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100 596
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8.3.8 RELEASE CONFIRM
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This message is sent from BTS to BSC to confirm the release of multi- frame mode of a radio link layer connection. INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 Channel number 9.3.1 M TV 2 Link Identifier 9.3.2 M TV 2 ETSI ETSI TS 100 596 V7.4.1 (2000-05) 38 (GSM 08.58 version 7.4.1 Release 1998)
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100 596
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8.3.9 RELEASE INDICATION
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This message is sent from BTS to BSC to indicate the release of a radio link layer connection (initiated by MS). INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 Channel number 9.3.1 M TV 2 Link Identifier 9.3.2 M TV 2
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100 596
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8.3.10 UNIT DATA REQUEST
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This message is sent from BSC to BTS to request the sending of a message in unacknowledged mode on a radio link layer connection. INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 Channel number 9.3.1 M TV 2 Link Identifier 9.3.2 M TV 2 L3 Information 9.3.11 M TLV 3-25
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100 596
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8.3.11 UNIT DATA INDICATION
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This message is sent from BTS to BSC to indicate the reception of a message in unacknowledged mode on a radio link layer connection. INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 Channel number 9.3.1 M TV 2 Link Identifier 9.3.2 M TV 2 L3 Information 9.3.11 M TLV 3-23
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100 596
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8.4 DEDICATED CHANNEL MANAGEMENT MESSAGES
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These messages are related to Dedicated Channel Management procedures. They all have the following general format: INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 Channel number 9.3.1 M TV 2 (Information elements depending on message type) ETSI ETSI TS 100 596 V7.4.1 (2000-05) 39 (GSM 08.58 version 7.4.1 Release 1998) The messages concerned are the following: Message name Reference section CHANnel ACTIVation 8.4.1 CHANnel ACTIVation ACKnowledge 8.4.2 CHANnel ACTIVation Negative ACK 8.4.3 CONNection FAILure INDication 8.4.4 DEACTIVATE SACCH 8.4.5 ENCRyption CoMmanD 8.4.6 HANDOver DETection 8.4.7 TALKER DETection 8.4.21 LISTENER DETection 8.4.22 MEASurement RESult 8.4.8 MODE MODIFY REQuest
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100 596
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8.4.9 MODE MODIFY
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ACKnowledge 8.4.10 MODE MODIFY Negative ACKnowledge 8.4.11 PHYsical CONTEXT REQuest 8.4.12 PHYsical CONTEXT CONFirm 8.4.13 RF CHANnel RELease 8.4.14 MS POWER CONTROL 8.4.15 BS POWER CONTROL 8.4.16 PREPROCecc CONFIGure 8.4.17 PREPROCessed MEASurement RESult 8.4.18 RF CHANnel RELease ACKnowledge 8.4.19 SACCH INFO MODIFY 8.4.20 REMOTE CODEC CONFiguration REPort 8.4.23 Round Trip Delay REPort 8.4.24 PRE-HANDOver NOTIFication 8.4.25 MultiRate CODEC MODification REQuest 8.4.26 MultiRate CODEC MOD ACKnowledge 8.4.27 MultiRate CODEC MOD Negative ACK 8.4.28 MultiRate CODEC MOD PERformed 8.4.29 TFO REPort 8.4.30 TFO MODification REQuest 8.4.31 ETSI ETSI TS 100 596 V7.4.1 (2000-05) 40 (GSM 08.58 version 7.4.1 Release 1998)
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100 596
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8.4.1 CHANNEL ACTIVATION
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This message is sent from BSC to BTS in order to activate a radio channel. The attributes of the channel are defined in the message. INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 Channel number 9.3.1 M TV 2 Activation Type 9.3.3 M TV 2 Channel Mode 9.3.6 M TLV 8-9 Channel Identification 9.3.5 O 7) TLV 8 Encryption information 9.3.7 O 1) TLV >=3 Handover Reference 9.3.9 C 2) TV 2 BS Power 9.3.4 O 3) TV 2 MS Power 9.3.13 O 3) TV 2 Timing Advance 9.3.24 C 3) 4) TV 2 BS Power Parameters 9.3.32 O 5) TLV >=2 MS Power Parameters 9.3.31 O 5) TLV >=2 Physical Context 9.3.16 O 6) TLV >=2 SACCH Information 9.3.29 O 8) TLV >=3 UIC 9.3.50 O 9) TLV 3 Main channel reference 9.3.45 O 10) TV 2 MultiRate configuration 9.3.52 O 11) TLV >=4 MultiRate Control 9.3.53 O 12) TV 2 Supported Codec Types 9.3.54 O 12) TLV >=5 1) The Encryption Information element is only included if ciphering is to be applied. 2) The Handover Reference element is only included if activation type is handover. 3) If BS Power, MS Power and/or Timing Advance elements are present, they are to be used to set the initial transmission power and the initial L1-header. 4) The Timing Advance element must be included if activation type is intra cell channel change. 5) The BS and MS Power Parameters elements are included to indicate that BS and/or MS power control is to be performed by BTS. The maximum power to be used is indicated in the BS and MS Power elements respectively. 6) Optional element for additional physical channel information. 7) Included if compatibility with phase1 is required. ETSI ETSI TS 100 596 V7.4.1 (2000-05) 41 (GSM 08.58 version 7.4.1 Release 1998) 8) Optional element for setting the SACCH filling information individually for this channel. If this element is present, the SACCH filling information as given by this element shall be used for this channel (replacing any SACCH filling information as given by the SACCH FILLING message(s)) until the channel is released or the information is changed by a SACCH INFO MODIFY message. (If this element is not present, the SACCH filling as given by the SACCH FILLING message(s) shall be used.) 9) The UIC element may be included for voice group calls. It is used in the same way as the BSIC for decoding the random access bursts when decoding uplink access bursts. If not included, the BSIC shall be used for decoding uplink access bursts. 10) Optional element for multislot operation, it may be used in case of power control in the BTS. 11) Included if the Channel Mode indicates that a multi-rate speech codec is used. 12) Optionally included if the Channel Mode indicates that a multi-rate speech codec is used and TFO control is required or to give to the BTS the possibility to change autonomously the multi-rate codec configuration.
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8.4.2 CHANNEL ACTIVATION ACKNOWLEDGE
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This message is sent from BSC to BTS to acknowledge that the requested channel activation has been completed correctly. INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 Channel number 9.3.1 M TV 2 Frame number 9.3.8 M TV 3 The Frame Number element is used by BSC to calculate the Starting Time parameter when required.
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100 596
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8.4.3 CHANNEL ACTIVATION NEGATIVE ACKNOWLEDGE
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This message is sent from BTS to BSC to indicate that the channel activation could not be performed as requested. INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 Channel number 9.3.1 M TV 2 Cause 9.3.26 M TLV >=3 If the Channel Activation message was received with an erroneous Channel number information element, the Channel Activation Negative Acknowledge message is returned with the Channel Number information element equal to the received (and erroneous) Channel number and the Cause value "Mandatory Information Element Error" with Diagnostics equal to the Channel number element identifier value. ETSI ETSI TS 100 596 V7.4.1 (2000-05) 42 (GSM 08.58 version 7.4.1 Release 1998)
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100 596
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8.4.4 CONNECTION FAILURE INDICATION
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This message is sent from BTS to BSC to indicate that an active connection has been broken for some reason. INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 Channel number 9.3.1 M TV 2 Cause 9.3.26 M TLV >=3
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100 596
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8.4.5 DEACTIVATE SACCH
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This message is sent from BSC to BTS in order to deactivate the SACCH of an active channel. INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 Channel number 9.3.1 M TV 2
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100 596
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8.4.6 ENCRYPTION COMMAND
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This message is sent from BSC to BTS to start ciphering mode operation. INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 Channel number 9.3.1 M TV 2 Encryption information 9.3.7 M TLV >=3 Link Identifier 9.3.2 M TV 2 L3 Info (CIPH MOD CMD) 9.3.11 M TLV 6 The L3 Info element contains the complete Ciphering Mode Command message as defined in GSM 04.08.
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100 596
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8.4.7 HANDOVER DETECTION
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This message is sent from BTS to BSC when BTS correctly receives information from an MS on the handover activated channel. INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 Channel number 9.3.1 M TV 2 Access Delay 9.3.17 O 1) TV 2 ETSI ETSI TS 100 596 V7.4.1 (2000-05) 43 (GSM 08.58 version 7.4.1 Release 1998) 1) The Access Delay element is included if the sending of the handover detection message was triggered by the reception of a handover access burst with the correct handover reference.
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8.4.8 MEASUREMENT RESULT
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This message from BTS to BSC is used to report to BSC the results of radio channel measurements made by BTS (uplink) and to convey the measurement reports from MS received on SACCH and in the L1 headers. INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 Channel number 9.3.1 M TV 2 Measurement result number 9.3.27 M TV 2 Uplink Measurements 9.3.25 M TLV >=5 BS Power 9.3.4 M TV 2 L1 Information 9.3.10 O 1) TV 3 L3 Info(MEAS REP or EXT MEAS REP) 9.3.11 O 1) TLV 21 MS Timing Offset 9.3.37 O 2) TV 2 1) The L1 Information element contains the last received L1-header (MS Power and Timing Advance) from MS and the L3 Information element contains the complete MEASurement REPort message or EXTended MEASurement REPort message freceived from MS. They are included only if received since last (EXTended) MEASurement RESult message. 2) MS Timing Offset can be optionally included to increase the accuracy of possible distance measurements. 8.4.9 MODE MODIFY This message is sent from BSC to BTS to request a change of channel mode of an active channel. INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 Channel number 9.3.1 M TV 2 Channel Mode 9.3.6 M TLV 8-9 Encryption information 9.3.7 O 1) TLV >=3 Main channel reference 9.3.45 O 2) TV 2 MultiRate configuration 9.3.52 O 3) TLV >=3 Multirate Control 9.3.53 O 4) TV 2 Supported Codec Types 9.3.54 O 4) TLV >=5 1) The Encryption Information element is only included if ciphering is to be applied. 2) Optional element for multislot operation, it may be used in case of power control in the BTS. 3) Included if the Channel Mode indicates that a multi-rate speech codec is used. ETSI ETSI TS 100 596 V7.4.1 (2000-05) 44 (GSM 08.58 version 7.4.1 Release 1998) 4) Optionally included if the Channel Mode indicates that a multi-rate speech codec is used and TFO control is required or to give to the BTS the possibility to change autonomously the multi-rate codec configuration.
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8.4.10 MODE MODIFY ACKNOWLEDGE
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This message is sent from BTS to BSC to confirm the change of channel mode of an active channel. INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 Channel number 9.3.1 M TV 2
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100 596
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8.4.11 MODE MODIFY NEGATIVE ACKNOWLEDGE
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This message is sent from BTS to BSC to indicate that the channel mode modification could not be performed as requested. INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 Channel number 9.3.1 M TV 2 Cause 9.3.26 M TLV >=3
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100 596
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8.4.12 PHYSICAL CONTEXT REQUEST
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This message is sent from BSC to BTS to request the "physical context" of an active channel. INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 Channel number 9.3.1 M TV 2
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100 596
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8.4.13 PHYSICAL CONTEXT CONFIRM
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This message is sent from BTS to BSC as a response to a PHYsical CONTEXT REQuest message. The message contains the "physical context" information. ETSI ETSI TS 100 596 V7.4.1 (2000-05) 45 (GSM 08.58 version 7.4.1 Release 1998) INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 Channel number 9.3.1 M TV 2 BS Power 9.3.4 M TV 2 MS Power 9.3.13 M TV 2 Timing Advance 9.3.24 M TV 2 Physical Context 9.3.16 O 1) TLV >=2 1) Optional element for additional physical channel information.
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100 596
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8.4.14 RF CHANNEL RELEASE
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This message is sent from BSC to BTS to inform that a radio channel is no longer needed. INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 Channel number 9.3.1 M TV 2
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100 596
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8.4.15 MS POWER CONTROL
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This message is sent from BSC to BTS to change the MS power level or the parameters used by TRX to control the MS power. INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 Channel number 9.3.1 M TV 2 MS Power 9.3.13 M TV 2 MS Power Parameters 9.3.31 O 1) TLV >=2 1) If the MS Power Parameters element is present it indicates that the MS power control is to be performed by TRX. The MS Power element then indicates the maximum MS power to be used.
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100 596
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8.4.16 BS POWER CONTROL
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This message is sent from BSC to BTS to change the TRX transmission power level or the parameters used by TRX to control its transmission power. ETSI ETSI TS 100 596 V7.4.1 (2000-05) 46 (GSM 08.58 version 7.4.1 Release 1998) INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 Channel number 9.3.1 M TV 2 BS Power 9.3.4 M TV 2 BS Power Parameters 9.3.32 O 1) TLV >=2 1) If the BS Power Parameters element is present it indicates that the TRX transmission power control is to be performed by TRX. The BS Power element then indicates the maximum transmission power to be used.
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100 596
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8.4.17 PREPROCESS CONFIGURE
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This message is sent from BSC to BTS to modify the pre-processing parameters used by BTS. INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 Channel number 9.3.1 M TV 2 Preproc. Parameters 9.3.33 M TLV >=3
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8.4.18 PREPROCESSED MEASUREMENT RESULT
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This message is used by BTS to report the results of radio parameter pre-processing. INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 Channel number 9.3.1 M TV 2 Preproc. Measurements 9.3.34 M TLV >=2
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8.4.19 RF CHANNEL RELEASE ACKNOWLEDGE
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This message is sent from BTS to BSC as an acknowledge to a RF CHANnel RELease message. INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 Channel number 9.3.1 M TV 2
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8.4.20 SACCH INFO MODIFY
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This message is sent from BSC to BTS to modify the SACCH filling information sent on an individual SACCH channel. This new SACCH filling information shall be sent on the indicated channel until the channel is released or the information is changed by another SACCH INFO MODIFY message. ETSI ETSI TS 100 596 V7.4.1 (2000-05) 47 (GSM 08.58 version 7.4.1 Release 1998) INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 Channel number 9.3.1 M TV 2 System Info Type 9.3.30 M TV 2 L3 Info 9.3.11 O 1) TLV 22 Starting Time 9.3.23 O 2) TV 3 1) If the L3 Info information element is not included, this indicates that transmission of the indicated message shall be stopped, i.e. message shall no longer be sent on this channel. 2) The Starting Time element is optionally used to indicate when transmission of the new information is to start and when transmission is to stop. The System Info Type element indicates the type of SYSTEM INFORMATION/EXTENDED MEASUREMENT ORDER message which follows in the L3 Info field. The L3 Information element contains the relevant SYSTEM INFORMATION/EXTENDED MEASUREMENT ORDER message as defined in GSM 04.08.
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100 596
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8.4.21 TALKER DETECTION
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This message is sent from BTS to BSC when BTS correctly receives on a channel activated for VGCS an access from an MS indicating that it requires the uplink of the channel. INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 Channel number 9.3.1 M TV 2 Access Delay 9.3.17 O 1) TV 2 1) The Access Delay element is included if the sending of the uplink access message was triggered by the reception of an uplink access burst with the correct values.
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8.4.22 LISTENER DETECTION
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This message is sent from BTS to BSC when BTS correctly receives on a channel activated for VGCS or VBS an access from an MS indicating its presence on the channel. INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 Channel number 9.3.1 M TV 2 Access Delay 9.3.17 O 1) TV 2 1) The Access Delay element is included if the sending of the uplink access message was triggered by the reception of an uplink access burst with the correct value. ETSI ETSI TS 100 596 V7.4.1 (2000-05) 48 (GSM 08.58 version 7.4.1 Release 1998)
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100 596
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8.4.23 REMOTE CODEC CONFIGURATION REPORT
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This message is sent by the BTS to the BSC to report the codec information received from a remote BTS prior to TFO establishment or in TFO. INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 Channel number 9.3.1 M TV 2 Codec Configuration 9.3.55 M TLV >=3 Supported Codec Types 9.3.54 M TLV >=5
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100 596
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8.4.24 ROUND TRIP DELAY REPORT
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This message is sent by the BSC to the BTS to report the computed round trip transmission delay between the BTS and the transcoder or between the BTS and the remote BTS when TFO is established. INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 Channel number 9.3.1 M TV 2 Round Trip Delay 9.3.56 M TV 2
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100 596
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8.4.25 PRE-HANDOVER NOTIFICATION
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This message is sent by the BSC to the serving BTS to notify the BTS that an handover is going to be performed. It is also sent by the BSC to the serving BTS if the announced handover has failed. INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 Channel number 9.3.1 M TV 2 MultiRateControl 9.3.53 M TV 2 Codec Configuration 9.3.55 M TLV >=3
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8.4.26 MULTIRATE CODEC MODIFICATION REQUEST
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This message is sent by the BSC to the BTS to request and authorise the BTS to change the Multi-Rate codec configuration using inband signalling message exchange. ETSI ETSI TS 100 596 V7.4.1 (2000-05) 49 (GSM 08.58 version 7.4.1 Release 1998) INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 Channel number 9.3.1 M TV 2 MultiRate Configuration 9.3.52 O 1) TLV >=4 1) Not included if the BTS can solve the codec mismatch for TFO establisment
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100 596
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8.4.27 MULTIRATE CODEC MODIFICATION ACKNOLEWDGE
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This message is sent by the BTS to the BSC to acknowledge the performed change of the MultiRate Codec configuration, when it was requested by the BSC with the MultiRate CODEC MODification REQuest message INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 Channel number 9.3.1 M TV 2 MultiRate Configuration 9.3.52 O 1) TLV >=4 8.4.28 MULTIRATE CODEC MODIFICATION NEGATIVE ACKNOWLEDGE This message is sent by the BTS to the BSC to report a failure to change the MultiRate Codec Configuration. INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 Channel number 9.3.1 M TV 2 Cause 9.3.26 M TLV >=3
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100 596
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8.4.29 MULTIRATE CODEC MODIFICATION PERFORMED
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This message is sent by the BTS to the BSC to inform the BSC of a performed change of the MultiRate Codec Configuration in case the BTS is generally authorised to perform this change and has initiated this on its own. INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 Channel number 9.3.1 M TV 2 MultiRate Configuration 9.3.52 M TLV >=4 ETSI ETSI TS 100 596 V7.4.1 (2000-05) 50 (GSM 08.58 version 7.4.1 Release 1998)
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100 596
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8.4.30 TFO REPORT
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This message is sent by the BTS to the BSC to inform the BSC that Tandem Free Operation with AMR is established, or is not established anymore. INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 Channel number 9.3.1 M TV 2 TFO Status 9.3.57 M TV 1
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8.4.31 TFO MODIFICATION REQUEST
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This message is sent by the BSC to the BTS to change the configuration of TFO while operating with AMR. INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 Channel number 9.3.1 M TV 2 MultiRateControl 9.3.53 M TV 2 Supported Codec Type 9.3.54 O 1) TLV >=5 1) Optionally included if TFO is enabled within I.E. MultiRateControl
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100 596
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8.5 COMMON CHANNEL MANAGEMENT MESSAGES
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These messages are related to Common Channel Management procedures. They all have the following general format: INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 Channel number 9.3.1 M TV 2 (Information elements depending on message type) The messages concerned are the following: Message name Reference section BCCH INFOrmation 8.5.1 CCCH LOAD INDication 8.5.2 CHANnel ReQuireD 8.5.3 DELETE INDication 8.5.4 PAGING CoMmanD 8.5.5 NOTification CoMmanD 8.5.10 ETSI ETSI TS 100 596 V7.4.1 (2000-05) 51 (GSM 08.58 version 7.4.1 Release 1998) IMMEDIATE ASSIGN COMMAND 8.5.6 SMS BroadCast REQuest 8.5.7 SMS Broadcast Command 8.5.8 CBCH LOAD INDICATION 8.5.9
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100 596
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8.5.1 BCCH INFORMATION
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This message is sent from BSC to BTS to indicate new information to be broadcast on BCCH. INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 Channel number 9.3.1 M TV 2 System Info Type 9.3.30 M TV 2 Full BCCH Info (SYS INFO) 9.3.39 O 1) TLV 25 Starting Time 9.3.23 O 2) TV 3 1) If the Full BCCH information element is not included this indicates that transmission of the indicated SYSTEM INFORMATION message shall be stopped. 2) The Starting Time element is optionally used to indicate when transmission of the new information is to start or when transmission is to stop. The System Info Type element indicates the type of SYSTEM INFORMATION message which follows in the Full BCCH Information element. The Full BCCH Information element contains the relevant SYSTEM INFORMATION message as defined in GSM 04.08.
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e1df81e32c85ac85801df65e6181a587
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100 596
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8.5.2 CCCH LOAD INDICATION
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This message is sent from BTS to BSC to report the current load on the indicated CCCH timeslot (random access, RACH, and paging, PCH). INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 Channel number (note) 9.3.1 M TV 2 RACH Load 9.3.18 C 1) TLV >=8 Paging Load 9.3.15 C 2) TV 3 NOTE: The BTS may set the "Channel Number" information element in this message to either the "uplink CCCH" or the "downlink CCCH" on that timeslot number. 1) The RACH load information element is included only if the Channel number information indicates "uplink CCCH". 2) The Paging load information element is included only if the Channel number information indicates "downlink CCCH". ETSI ETSI TS 100 596 V7.4.1 (2000-05) 52 (GSM 08.58 version 7.4.1 Release 1998)
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100 596
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8.5.3 CHANNEL REQUIRED
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This message is sent from BTS to BSC to indicate the reception of a CHANnel REQuest message (special access burst message) from an MS. INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 Channel number 9.3.1 M TV 2 Request Reference 9.3.19 M TV 4 Access Delay 9.3.17 M TV 2 Physical Context 9.3.16 O 1) TLV >=2 1) Optional element for additional physical channel information. The Request Reference element contains the random access reference value sent by MS in the CHANnel REQuest message and some low order bits of the absolute frame number for the reception of the access burst.
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100 596
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8.5.4 DELETE INDICATION
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This message is sent from BTS to BSC to indicate the deletion of an access grant message (IMMediate ASSIGN) due to overload of downlink CCCH. INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 Channel number 9.3.1 M TV 2 Full Imm. Assign Info 9.3.35 M TLV 25
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100 596
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8.5.5 PAGING COMMAND
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This message is sent from BSC to BTS to request the paging of an MS. INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 Channel number 9.3.1 M TV 2 Paging Group 9.3.14 M TV 2 MS Identity 9.3.12 M TLV 2-10 Channel Needed 9.3.40 O 1) TV 2 eMLPP Priority 9.3.49 O 2) TV 3 1) If the Channel Needed element is not present, the default value is assumed to be 00 (any channel). 2) If the eMLPP Priority is not present then the BTS does not include the eMLPP priority in the radio interface message. ETSI ETSI TS 100 596 V7.4.1 (2000-05) 53 (GSM 08.58 version 7.4.1 Release 1998) The Paging Group element is used by BTS to calculate the correct DRX paging block to be used for the transmission of the PAGing REQuest message as defined in GSM 05.02.
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100 596
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8.5.6 IMMEDIATE ASSIGN COMMAND
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This message is sent from BSC to BTS to request the transmission of an immediate assignment message. INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 Channel number 9.3.1 M TV 2 Full Imm. Assign Info 9.3.35 M TLV 25 The Full Imm. Assign Info element contains the relevant immediate assignment message as defined in GSM 04.08 (IMMEDIATE ASSIGNMENT or IMMEDIATE ASSIGNMENT EXTENDED or IMMEDIATE ASSIGNMENT REJECT) with the "Page Mode" element set to the value "no change".
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100 596
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8.5.7 SMS BROADCAST REQUEST
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This message is sent from BSC to BTS to request the sending of a Short Message Service Cell Broadcast message. INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 Channel number 9.3.1 M TV 2 SMSCB Information 9.3.36 M TV 24 SMSCB Channel Indicator 9.3.44 O 1) TV 2 The SMSCB Information element contains the complete information to be broadcast on the CBCH as defined in GSM 04.12 (including the Layer 2 header to be used on the radio path). 1) The SMSCB Channel Indicator IE indicates the CBCH which shall be used for broadcasting the data. If this information element is not present the basic CBCH (see GSM 05.02) shall be used.
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100 596
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8.5.8 SMS BROADCAST COMMAND
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This message is sent from BSC to BTS to command Short Message Service Cell Broadcast. INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 Channel number 9.3.1 M TV 2 CB Command type 9.3.41 M TV 2 SMSCB message 9.3.42 M TLV 2-90 SMSCB Channel Indicator 9.3.44 O 1) TV 2 ETSI ETSI TS 100 596 V7.4.1 (2000-05) 54 (GSM 08.58 version 7.4.1 Release 1998) The CB Command type IE contains the command to be performed, allowing the BSC to: - request immediate broadcast i.e. transmission in the next CBCH opportunity; - set the BTS broadcast default mode. The SMSCB message IE contains the actual message to be broadcast on the CBCH i.e. a maximum of 88 octets of data. The BTS is responsible for performing the segmentation, building the block types and padding if necessary, see GSM 04.12 for the message format on the radio path. 1) The SMSCB Channel Indicator IE indicates the CBCH which shall be used for broadcasting the data. If this information element is not present the basic CBCH [see GSM 05.02] shall be used.
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100 596
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8.5.9 CBCH LOAD INDICATION
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This message is sent from BTS to BSC to indicate a CBCH underflow/overflow situation in the BTS and to request the BSC to accelerate or pause the cell broadcast for a period indicated by BTS. INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 Channel number 9.3.1 M TV 2 CBCH Load Information 9.3.43 M TV 2 SMSCB Channel Indicator 9.3.44 O 1) TV 2 The CBCH Load Information element indicates the load situation in CBCH (underflow/overflow) and information about the requested acceleration/suspension period of cell broadcast. 1) The SMSCB Channel Indicator IE indicates the CBCH which shall be used for broadcasting the data. If this information element is not present the basic CBCH [see GSM 05.02] shall be used.
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100 596
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8.5.10 NOTIFICATION COMMAND
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This message is sent from BSC to BTS to request a change of notification for voice group call. INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 Channel number 9.3.1 M TV 2 Command indicator 9.3.48 M 1) TLV 3-4 Group call reference 9.3.45 O TLV 3-10 Channel Description 9.3.46 O TLV 3-n NCH DRX information 9.3.47 O TLV 3 1) This information element indicates the type of command that is to be performed by the BTS with respect to information contained in the rest of the message. ETSI ETSI TS 100 596 V7.4.1 (2000-05) 55 (GSM 08.58 version 7.4.1 Release 1998)
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100 596
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8.6 TRX MANAGEMENT MESSAGES
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These messages are related to TRX Management procedures. They all have the following general format (no channel number included): INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 (Information elements depending on message type) The messages concerned are the following: Message name Reference section RF RESource INDication 8.6.1 SACCH FILLing 8.6.2 OVERLOAD 8.6.3 ERROR REPORT 8.6.4
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8.6.1 RF RESOURCE INDICATION
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This message is sent from BTS to BSC to indicate the interference level on idle channels of a TRX. INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 Resource Information 9.3.21 M TLV >=2
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100 596
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8.6.2 SACCH FILLING
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This message is sent from BSC to BTS to indicate the new broadcast information to be used as filling information on downlink SACCH. INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 System Info Type 9.3.30 M TV 2 L3 Info (SYS INFO) 9.3.11 O 1) TLV 22 Starting Time 9.3.23 O 2) TV 3 1) If the L3 Info information element is not included this indicates that transmission of the indicated SYSTEM INFORMATION message shall be stopped. 2) The Starting Time element is optionally used to indicate when transmission of the new information is to start and when transmission is to stop. ETSI ETSI TS 100 596 V7.4.1 (2000-05) 56 (GSM 08.58 version 7.4.1 Release 1998) The System Info Type element indicates the type of SYSTEM INFORMATION message which follows in the L3 Info field. The L3 Information element contains the relevant SYSTEM INFORMATION message as defined in GSM 04.08.
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8.6.3 OVERLOAD
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This message is sent from BTS to BSC to indicate an overload situation. Possible cause values include: - CCCH overload; - ACCH overload; - processor overload. INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 Cause 9.3.26 M TLV >=3
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8.6.4 ERROR REPORT
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This message is sent from BTS to BSC to report a detected error which cannot be reported in any other message. INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 Cause 9.3.26 M TLV >=3 Message Identifier 9.3.28 O 1) TV 2 Channel Number 9.3.1 O 2) TV 2 Link identifier 9.3.2 O 3) TV 2 Erroneous Message 9.3.38 O 4) TLV >=3 1) Used to indicate which type of message was considered erroneous. 2) Used to indicate for which radio channel the error is reported. 3) Used to indicate for which radio L2 link the error is reported. 4) This element may be used to carry the complete erroneous message as it was received from the BSC. ETSI ETSI TS 100 596 V7.4.1 (2000-05) 57 (GSM 08.58 version 7.4.1 Release 1998)
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100 596
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8.7 LOCATION SERVICES MESSAGES
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These messages are related to Location Services (LCS).
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100 596
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8.7.1 LOCATION INFORMATION
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This message is sent by the BSC, the BTS or Sandalone Type B LMU via Abis interface to convey an embedded LCS LLP message. INFORMATION ELEMENT REFERENCE PRESENCE FORMAT LENGTH Message discriminator 9.1 M V 1 Message type 9.2 M V 1 LLP APDU 9.3.58 M LV 2-N
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100 596
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9 Information element codings
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This clause contains the codings of the signalling elements used. The following conventions are assumed for the sequence of transmission of bits and bytes: - Each bit position is numbered as 1 to 8. 8 7 6 5 4 3 2 1 - The least significant bit is bit 1 and is transmitted first, followed by bits 2, 3, 4 etc. - In an element, octets are identified by number. Octet 1 is transmitted first, then octet 2 etc. - When a field extends over more than one octet, the order of bit values progressively decreases as the octet number increases. The least significant bit of the field is represented by the lowest numbered bit of the highest numbered octet of the field. - For variable length elements, a length indicator is included. This indicates the number of octets following in the element. - All spare or reserved bits are set to 0.
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100 596
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9.1 Message discriminator
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A 1 octet field is used in all messages to discriminate between Transparent and Non-Transparent messages and also between Radio Link Layer Management, Dedicated Channel Management, Common Channel Management and TRX Management messages. 8 7 6 5 4 3 2 1 G7 G6 G5 G4 G3 G2 G1 T The T-bit is set to 1 to indicate that the message is to be/was considered transparent by BTS. All other messages shall have the T-bit set to 0. ETSI ETSI TS 100 596 V7.4.1 (2000-05) 58 (GSM 08.58 version 7.4.1 Release 1998) The G-bits are used to group the messages as follows: G7 G6 G5 G4 G3 G2 G1 Message Group 0 0 0 0 0 0 0 reserved 0 0 0 0 0 0 1 Radio Link Layer Management messages 0 0 0 0 1 0 0 Dedicated Channel Management messages 0 0 0 0 1 1 0 Common Channel Management messages 0 0 0 1 0 0 0 TRX Management messages 0 0 1 0 0 0 0 Location Services messages All other values are reserved for future use.
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100 596
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9.2 MESSAGE TYPE
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The Message Type uniquely identifies the function of the message being sent. It is a single octet and coded in the following way: 8 7 6 5 4 3 2 1 EM Message type Bit 8 is the extension bit and is reserved for future use. The following message types are used (all other values are reserved): 8 7 6 5 4 3 2 1 Message Reference 0 0 0 0 - - - - Radio Link Layer Management messages: 0 0 0 1 - DATA REQuest 8.3.1 0 0 1 0 - DATA INDication 8.3.2 0 0 1 1 - ERROR INDication 8.3.3 0 1 0 0 - ESTablish REQuest 8.3.4 0 1 0 1 - ESTablish CONFirm 8.3.5 0 1 1 0 - ESTablish INDication 8.3.6 0 1 1 1 - RELease REQuest 8.3.7 1 0 0 0 - RELease CONFirm 8.3.8 1 0 0 1 - RELease INDication 8.3.9 1 0 1 0 - UNIT DATA REQuest 8.3.10 1 0 1 1 - UNIT DATA INDication 8.3.11 0 0 0 1 - - - - Common Channel Management/TRX Management messages: 0 0 0 1 - BCCH INFOrmation 8.5.1 0 0 1 0 - CCCH LOAD INDication 8.5.2 0 0 1 1 - CHANnel ReQuireD 8.5.3 0 1 0 0 - DELETE INDication 8.5.4 0 1 0 1 - PAGING CoMmanD 8.5.5 0 1 1 0 - IMMEDIATE ASSIGN COMMAND 8.5.6 0 1 1 1 - SMS BroadCast REQuest 8.5.7 1 0 0 1 - RF RESource INDication 8.6.1 1 0 1 0 - SACCH FILLing 8.6.2 1 0 1 1 - OVERLOAD 8.6.3 1 1 0 0 - ERROR REPORT 8.6.4 1 1 0 1 - SMS BroadCast CoMmanD 8.5.8 1 1 1 0 - CBCH LOAD INDication 8.5.9 1 1 1 1 - NOTification CoMmanD 8.5.10 ETSI ETSI TS 100 596 V7.4.1 (2000-05) 59 (GSM 08.58 version 7.4.1 Release 1998) 0 0 1 - - - - - Dedicated Channel Management messages: 0 0 0 0 1 - CHANnel ACTIVation 8.4.1 0 0 0 1 0 - CHANnel ACTIVation ACKnowledge 8.4.2 0 0 0 1 1 - CHANnel ACTIVation Negative ACK 8.4.3 0 0 1 0 0 - CONNection FAILure 8.4.4 0 0 1 0 1 - DEACTIVATE SACCH 8.4.5 0 0 1 1 0 - ENCRyption CoMmanD 8.4.6 0 0 1 1 1 - HANDOver DETection 8.4.7 0 1 0 0 0 - MEASurement RESult 8.4.8 0 1 0 0 1 - MODE MODIFY REQuest 8.4.9 0 1 0 1 0 - MODE MODIFY ACKnowledge 8.4.10 0 1 0 1 1 - MODE MODIFY Negative ACKnowledge 8.4.11 0 1 1 0 0 - PHYsical CONTEXT REQuest 8.4.12 0 1 1 0 1 - PHYsical CONTEXT CONFirm 8.4.13 0 1 1 1 0 - RF CHANnel RELease 8.4.14 0 1 1 1 1 - MS POWER CONTROL 8.4.15 1 0 0 0 0 - BS POWER CONTROL 8.4.16 1 0 0 0 1 - PREPROCess CONFIGure 8.4.17 1 0 0 1 0 - PREPROCessed MEASurement RESult 8.4.18 1 0 0 1 1 - RF CHANnel RELease ACKnowledge 8.4.19 1 0 1 0 0 - SACCH INFO MODIFY 8.4.20 1 0 1 0 1 - TALKER DETection 8.4.21 1 0 1 1 0 - LISTENER DETection 8.4.22 1 0 1 1 1 - REMOTE CODEC CONFiguration REPort 8.4.23 1 1 0 0 0 - Round Trip Delay REPort 8.4.24 1 1 0 0 1 - PRE-HANDOver NOTIFication 8.4.25 1 1 0 1 0 - MultiRate CODEC MODification REQest 8.4.26 1 1 0 1 1 - MultiRate CODEC MOD ACKnowledge 8.4.27 1 1 1 0 0 - MultiRate CODEC MOD Negative ACKnowledge 8.4.28 1 1 1 0 1 - MultiRate CODEC MOD PERformed 8.4.29 1 1 1 1 0 - TFO REPort 8.4.30 1 1 1 1 1 - TFO MODification REQuest 8.4.31 0 1 - - - - - - Location Services messages: 0 0 0 0 0 1 - Location Information 8.7.1
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100 596
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9.3 Other information elements
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The information elements used and the coding of their Element Identifier fields are: Element Identifier bits 8 7 6 5 4 3 2 1 Element name Reference 0 0 0 0 0 0 0 1 Channel Number 9.3.1 0 0 0 0 0 0 1 0 Link Identifier 9.3.2 0 0 0 0 0 0 1 1 Activation Type 9.3.3 0 0 0 0 0 1 0 0 BS Power 9.3.4 0 0 0 0 0 1 0 1 Channel Identification 9.3.5 0 0 0 0 0 1 1 0 Channel Mode 9.3.6 0 0 0 0 0 1 1 1 Encryption Information 9.3.7 0 0 0 0 1 0 0 0 Frame Number 9.3.8 0 0 0 0 1 0 0 1 Handover Reference 9.3.9 0 0 0 0 1 0 1 0 L1 Information 9.3.10 0 0 0 0 1 0 1 1 L3 Information 9.3.11 0 0 0 0 1 1 0 0 MS Identity 9.3.12 0 0 0 0 1 1 0 1 MS Power 9.3.13 0 0 0 0 1 1 1 0 Paging Group 9.3.14 ETSI ETSI TS 100 596 V7.4.1 (2000-05) 60 (GSM 08.58 version 7.4.1 Release 1998) 0 0 0 0 1 1 1 1 Paging Load 9.3.15 0 0 0 1 0 0 0 0 Physical Context 9.3.16 0 0 0 1 0 0 0 1 Access Delay 9.3.17 0 0 0 1 0 0 1 0 RACH Load 9.3.18 0 0 0 1 0 0 1 1 Request Reference 9.3.19 0 0 0 1 0 1 0 0 Release Mode 9.3.20 0 0 0 1 0 1 0 1 Resource Information 9.3.21 0 0 0 1 0 1 1 0 RLM Cause 9.3.22 0 0 0 1 0 1 1 1 Starting Time 9.3.23 0 0 0 1 1 0 0 0 Timing Advance 9.3.24 0 0 0 1 1 0 0 1 Uplink Measurements 9.3.25 0 0 0 1 1 0 1 0 Cause 9.3.26 0 0 0 1 1 0 1 1 Measurement result number 9.3.27 0 0 0 1 1 1 0 0 Message Identifier 9.3.28 0 0 0 1 1 1 0 1 reserved 0 0 0 1 1 1 1 0 System Info Type 9.3.30 0 0 0 1 1 1 1 1 MS Power Parameters 9.3.31 0 0 1 0 0 0 0 0 BS Power Parameters 9.3.32 0 0 1 0 0 0 0 1 Pre-processing Parameters 9.3.33 0 0 1 0 0 0 1 0 Pre-processed Measurements 9.3.34 0 0 1 0 0 0 1 1 reserved 0 0 1 0 0 1 0 0 SMSCB Information 9.3.36 0 0 1 0 0 1 0 1 MS Timing Offset 9.3.37 0 0 1 0 0 1 1 0 Erroneous Message 9.3.38 0 0 1 0 0 1 1 1 Full BCCH Information 9.3.39 0 0 1 0 1 0 0 0 Channel Needed 9.3.40 0 0 1 0 1 0 0 1 CB Command type 9.3.41 0 0 1 0 1 0 1 0 SMSCB message 9.3.42 0 0 1 0 1 0 1 1 Full Immediate Assign Info 9.3.35 0 0 1 0 1 1 0 0 SACCH Information 9.3.29 0 0 1 0 1 1 0 1 CBCH Load Information 9.3.43 Element Identifier bits 8 7 6 5 4 3 2 1 Element name Reference 0 0 1 0 1 1 1 0 SMSCB Channel Indicator 9.3.44 0 0 1 0 1 1 1 1 Group call reference 9.3.45 0 0 1 1 0 0 0 0 Channel description 9.3.46 0 0 1 1 0 0 0 1 NCH DRX information 9.3.47 0 0 1 1 0 0 1 0 Command indicator 9.3.48 0 0 1 1 0 0 1 1 eMLPP Priority 9.3.49 0 0 1 1 0 1 0 0 UIC 9.3.50 0 0 1 1 0 1 0 1 Main channel reference 9.3.51 0 0 1 1 0 1 1 0 MultiRate configuration 9.3.52 0 0 1 1 0 1 1 1 MultiRate Control 9.3.53 0 0 1 1 1 0 0 0 Supported Codec Types 9.3.54 0 0 1 1 1 0 0 1 Codec Configuration 9.3.55 0 0 1 1 1 0 1 0 Round Trip Delay 9.3.56 0 0 1 1 1 0 1 1 TFO Status 9.3.57 0 0 1 1 1 1 0 0 LLP APDU 9.3.58 0 0 1 1 1 1 0 1 to 1 1 1 0 1 1 1 1 Reserved for future use 1 1 1 1 0 0 0 0 to 1 1 1 1 1 1 1 1 Not used ETSI ETSI TS 100 596 V7.4.1 (2000-05) 61 (GSM 08.58 version 7.4.1 Release 1998)
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100 596
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9.3.1 Channel Number
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In the direction BSC to BTS the Channel Number parameter is used to indicate on which physical channel/subchannel the message is to be sent. In the direction BTS to BSC the Channel Number indicates on which physical channel/subchannel the message was received. It is coded in two octets as follows: 8 7 6 5 4 3 2 1 Element identifier 1 C5 C4 C3 C2 C1 TN 2 The C-bits describe the channel as follows: C5 C4 C3 C2 C1 0 0 0 0 1 Bm + ACCH's 0 0 0 1 T Lm + ACCH's 0 0 1 T T SDCCH/4 + ACCH 0 1 T T T SDCCH/8 + ACCH 1 0 0 0 0 BCCH 1 0 0 0 1 Uplink CCCH (RACH) 1 0 0 1 0 Downlink CCCH (PCH + AGCH) The T-bits indicate, coded in binary, the sub-channel number as specified in GSM 05.02. TN is time slot number, binary represented as in GSM 05.02.
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e1df81e32c85ac85801df65e6181a587
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100 596
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9.3.2 Link Identifier
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This element identifies the signalling channel and SAPI of the radio data link. 8 7 6 5 4 3 2 1 Element identifier 1 C2 C1 NA priority SAPI 2 The NA bit (bit 6 in octet 2) is set to 1 to indicate thet the Link Identifier is not applicable for this message. In all other cases it is set to 0. The C-bits indicate the channel type as follows: C2 C1 0 0 main signalling channel (FACCH or SDCCH) 0 1 SACCH All other values are reserved for future use. The SAPI field contains the SAPI value as defined in GSM 04.05. The priority field contains the message priority for SAPI 0, as defined in GSM 04.06, as follows: 0 0 normal priority 0 1 high priority 1 0 low priority All other values for SAPI 0 and all values for other SAPIs are reserved for future use. ETSI ETSI TS 100 596 V7.4.1 (2000-05) 62 (GSM 08.58 version 7.4.1 Release 1998)
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100 596
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9.3.3 Activation Type
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This element is used to indicate the type of activation requested in the CHANnel ACTIVation message. It is coded in two octets as follows: 8 7 6 5 4 3 2 1 Element identifier 1 R Reserved A3 A2 A1 2 The R bit indicates if the procedure is an initial activation or a reactivation. R 0 - Initial activation 1 - Reactivation The A-bits indicate the type of activation, which defines the access procedure and the operation of the data link layer, as follows: A3 A2 A1 0 0 - Activation related to intra-cell channel change 0 - related to immediate assignment procedure 1 - related to normal assignment procedure 0 1 - Activation related to inter-cell channel change (handover) 0 - related to asynchronous handover procedure 1 - related to synchronous handover procedure 1 0 - Activation related to secondary channels 0 - related to additional assignment procedure 1 - related to multislot configuration All other values reserved for future use. NOTE: For the main TCH channel in a Multislot configuration activation types for intra-cell and inter-cell channel change are used. ETSI ETSI TS 100 596 V7.4.1 (2000-05) 63 (GSM 08.58 version 7.4.1 Release 1998)
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100 596
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9.3.4 BS Power
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This information element indicates the TRX transmission power level on a particular channel. 8 7 6 5 4 3 2 1 Element identifier 1 Reserved Power Level 2 The Power Level field (octet 2) indicates the number of 2 dB steps by which the power shall be reduced from its nominal value, Pn, set by the network operator to adjust the coverage. Thus the Power Level values correspond to the following powers (relative to Pn): Value Power level 0 0 0 0 0 Pn 0 0 0 0 1 Pn - 2 dB 0 0 0 1 0 Pn - 4 dB . . 0 1 1 1 0 Pn - 28 dB 0 1 1 1 1 Pn - 30 dB All other values are reserved for future use. See also GSM 05.05, subclause 4.1.2 and GSM 05.08, subclause 4.5.
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e1df81e32c85ac85801df65e6181a587
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100 596
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9.3.5 Channel Identification
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This information element describes some aspects of a channel together with its SACCH. 8 7 6 5 4 3 2 1 Element identifier 1 Length 2 04.08 "Channel Description" * 04.08 "Mobile Allocation" * A * denotes that the whole of the 04.08 element including the element identifier and length should be included. The 04.08 "Mobile Allocation" shall for compatibility reasons be included but empty, i.e. the length shall be zero.
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e1df81e32c85ac85801df65e6181a587
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100 596
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9.3.6 Channel Mode
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This element gives information on the mode of coding/decoding and transcoding/rate adaption of a channel. 8 7 6 5 4 3 2 1 Element identifier 1 Length 2 Reserved for future use DTXd DTXu 3 Speech or data indicator 4 Channel rate and type 5 Speech coding algor./data rate + transp ind 6 ETSI ETSI TS 100 596 V7.4.1 (2000-05) 64 (GSM 08.58 version 7.4.1 Release 1998) The DTX bits of octet 3 indicate whether DTX is applied: 1 DTX is applied 0 DTX is not applied. DTXd indicates use of DTX in the downlink direction (BTS to MS) and DTXu indicates use of DTX in the uplink direction (MS to BTS). The "Speech or data indicator" field (octet 4) is coded as follows: 0000 0001 Speech 0000 0010 Data 0000 0011 Signalling All other values are reserved. The "Channel rate and type" field (octet 5) is coded as follows: 0000 0001 SDCCH 0000 1000 Full rate TCH channel Bm 0000 1001 Half rate TCH channel Lm 0000 1010 Full rate TCH channel bi-directional Bm, Multislot configuration 0001 1010 Full rate TCH channel uni-directional downlink Bm, Multislot configuration 0001 1000 Full rate TCH channel Bm Group call channel 0001 1001 Half rate TCH channel Lm Group call channel 0010 1000 Full rate TCH channel Bm Broadcast call channel 0010 1001 Half rate TCH channel Lm Broadcast call channel All other values are reserved. The "speech coding algorithm/data rate + transparency indicator" field (octet 6) is coded as follows: If octet 4 indicates speech, then octet 6 is coded as follows: 0000 0001 GSM speech coding algorithm version 1 0001 0001 GSM speech coding algorithm version 2 0010 0001 GSM speech coding algorithm version 3 All other values are reserved. If octet 4 indicates signalling then octet 6 is coded as follows: 0000 0000 No resources required All other values are reserved. NOTE: GSM speech coding algorithm version 3 is also referred as GSM adaptive multirate speech coding algorithm version 1. If octet 4 indicates data, then octet 6 is coded as follows: 8 7 6 5 4 3 2 1 ext T/NT Rate octet 6 Bit 8: Reserved for extension Bit 7: 0 Transparent service 1 Non-transparent service. ETSI ETSI TS 100 596 V7.4.1 (2000-05) 65 (GSM 08.58 version 7.4.1 Release 1998) For the non-transparent service, bits 6 to 1 indicate the radio interface data rate: 65 4321 01 1000 14.5 kbit/s 01 0000 12 kbit/s 01 0001 6 kbit/s all other values are reserved. For the transparent service, bits 6-1 indicate the data rate: 65 4321 01 1000 14.4 kbit/s 01 0000 9.6 kbit/s 01 0001 4.8 kbit/s 01 0010 2.4 kbit/s 01 0011 1.2 kbit/s 01 0100 600 bit/s 01 0101 1 200/75 bit/s (1 200 network-to-MS, 75 MS-to-network) All other values are reserved.
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100 596
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9.3.7 Encryption information
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This element is a variable length element. It contains necessary information to control encryption devices. 8 7 6 5 4 3 2 1 Element identifier 1 Length 2 Algorithm identifier 3 Key 4 n The Algorithm Identifier field (octet 3) indicates the relevant ciphering algorithm. It is coded as: 0000 0000 Reserved 0000 0001 No encryption shall be used. 0000 0010 GSM encryption algorithm version 1 (A5/1) 0000 0011 GSM A5/2 0000 0100 GSM A5/3 0000 0101 GSM A5/4 0000 0110 GSM A5/5 0000 0111 GSM A5/6 0000 1000 GSM A5/7 All other values are reserved The Key field (octets 4-n) indicates the ciphering key. It shall be an integral number of octets and the length is given as the value of the Length field minus 1. ETSI ETSI TS 100 596 V7.4.1 (2000-05) 66 (GSM 08.58 version 7.4.1 Release 1998)
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e1df81e32c85ac85801df65e6181a587
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100 596
|
9.3.8 Frame Number
|
This element contains the absolute frame number (FN) modulo 42432. It is used to carry the current timing in BTS to BSC for calculation of the Starting Time parameter required in some messages. 8 7 6 5 4 3 2 1 Element identifier 1 T1' T3 (high) 2 T3 (low) T2 3 Octets 2-3 are coded as defined for octets 2-3 of the Starting Time information element of GSM 04.08.
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e1df81e32c85ac85801df65e6181a587
|
100 596
|
9.3.9 Handover reference
|
The information is coded in two octets and contains the hand-over reference value. 8 7 6 5 4 3 2 1 Element identifier 1 Hand─over reference 2 The Handover Reference octet contains the handover reference value as defined in GSM 04.08.
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e1df81e32c85ac85801df65e6181a587
|
100 596
|
9.3.10 L1 Information
|
This element carries the information used in the L1 header of SACCH blocks. 8 7 6 5 4 3 2 1 Element identifier 1 MS power level Reserved 2 Actual Timing Advance Reserved 3 Octets 2-3 contain the L1 header information of SACCH blocks. The information fields and codings are as defined in GSM 04.04.
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e1df81e32c85ac85801df65e6181a587
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100 596
|
9.3.11 L3 Information (message name)
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This element contains a link layer service data unit (L3 message). It is used to forward a complete L3 message as specified in GSM 04.08 between BTS and BSC. 8 7 6 5 4 3 2 1 Element identifier 1 Length 2 Indicator 3 Link Layer Service Data Unit 4 (i.e. a layer 3 message as defined in GSM 04.08) n The Length Indicator field (octets 2-3) indicates in binary the remaining length of the element (octets 4-n). The most significant bit is bit 8 of octet 2 and the least significant bit is bit 1 of octet 3. Octets 4-n contain the complete L3 message as defined in GSM 04.08. In the message format section, the 04.08 message name to be included is indicated within brackets. ETSI ETSI TS 100 596 V7.4.1 (2000-05) 67 (GSM 08.58 version 7.4.1 Release 1998)
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e1df81e32c85ac85801df65e6181a587
|
100 596
|
9.3.12 MS Identity
|
This element carries the identity of an MS (TMSI or IMSI). It is a variable length element. 8 7 6 5 4 3 2 1 Element identifier 1 Length 2 3 MS Identity N The MS Identity field (octets 3-N) is coded as specified for the Mobile Identity information element of GSM 04.08, octets 3-N.
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e1df81e32c85ac85801df65e6181a587
|
100 596
|
9.3.13 MS Power
|
This element carries the power level of MS. 8 7 6 5 4 3 2 1 Element identifier 1 Reserved Power Level 2 The coding and meaning of the Power Level field is as defined in GSM 05.05 and GSM 05.08. See also GSM 04.04.
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e1df81e32c85ac85801df65e6181a587
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100 596
|
9.3.14 Paging Group
|
This element carries the paging population of an MS to be paged. 8 7 6 5 4 3 2 1 Element identifier 1 Paging Group 2 The Paging Group field (octet 2) contains the binary representation of the paging group as defined in GSM 05.02.
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e1df81e32c85ac85801df65e6181a587
|
100 596
|
9.3.15 Paging Load
|
This element carries data about the load of a paging channel (PCH). 8 7 6 5 4 3 2 1 Element identifier 1 2 Paging Buffer Space 3 The Paging Buffer Space field (octets 2-3) indicates the remaining space for Paging Commands associated with this CCCH timeslot, given as the number of additional Paging Commands that it is possible to store. The number is binary coded with the most significant bit in bit 8 of octet 2 and the least significant bit in bit 1 of octet 3.
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e1df81e32c85ac85801df65e6181a587
|
100 596
|
9.3.16 Physical Context
|
This element contains supplementary information on the transmission/reception process. It is a variable length element. 8 7 6 5 4 3 2 1 Element identifier 1 Length 2 Physical 3 Context Information N The Physical Context Information field is not specified. This information should not be analysed by BSC, but merely forwarded from one TRX/channel to another. ETSI ETSI TS 100 596 V7.4.1 (2000-05) 68 (GSM 08.58 version 7.4.1 Release 1998)
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e1df81e32c85ac85801df65e6181a587
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100 596
|
9.3.17 Access Delay
|
This element contains the delay of the access burst as measured by BTS at random access or at handover access. 8 7 6 5 4 3 2 1 Element identifier 1 Access Delay 2 The Access Delay field contains the delay of the access burst as measured by BTS. The delay is expressed as defined for the Timing Advance TA in GSM 05.10 but with the range extended to 8 bits, i.e. the six least significant bits of the field correspond to the Timing Advance.
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e1df81e32c85ac85801df65e6181a587
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100 596
|
9.3.18 RACH Load
|
This element is used to carry information on the load of the RACH (Random Access Channel) associated with this CCCH timeslot. It is of variable length. 8 7 6 5 4 3 2 1 Element identifier 1 Length 2 3 RACH Slot Count 4 5 RACH Busy Count 6 7 RACH Access Count 8 9 Supplementary Information N The RACH Slot Count field (octets 3-4) indicates the total number of available access slots over which the measurement (counting) was performed. The value is binary coded with the most significant bit in bit 8 of the first octet and the least significant bit in bit 1 of the second octet. The RACH Busy Count field (octets 5-6) indicates the number of RACH burst periods during which the received signal level has exceeded a given threshold. This will give a measure of the number of "busy" random access slots. The value is binary coded with the most significant bit in bit 8 of the first octet and the least significant bit in bit 1 of the second octet. The RACH Access Count field (octets 7-8) indicates the number of received access bursts during the same measurement period. The value is binary coded with the most significant bit in bit 8 of the first octet and the least significant bit in bit 1 of the second octet. The busy count signal level threshold and the measurement period are parameters set by O&M. The Supplementary Information field may carry additional operator dependent information.
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e1df81e32c85ac85801df65e6181a587
|
100 596
|
9.3.19 Request Reference
|
This element carries the Request Reference parameters used for contention resolution on RACH. 8 7 6 5 4 3 2 1 Element identifier 1 RA 2 T1' T3 (high) 3 T3 (low) T2 4 Octets 2-4 are coded as the corresponding fields of the Request Reference element of GSM 04.08. (Octet 2, RA, is the Random Access Information field set by MS in the CHANnel REQuest message. Octets 3-4 contain the absolute frame number modulo 42432 for the frame number when the access burst was received, see Starting Time information element of GSM 04.08). ETSI ETSI TS 100 596 V7.4.1 (2000-05) 69 (GSM 08.58 version 7.4.1 Release 1998)
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e1df81e32c85ac85801df65e6181a587
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100 596
|
9.3.20 Release Mode
|
This element is used to distinguish between normal release and local end release of the radio data link connection. 8 7 6 5 4 3 2 1 Element identifier 1 Reserved for future use M 2 The M bit is coded as follows: 0 normal release 1 local end release
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e1df81e32c85ac85801df65e6181a587
|
100 596
|
9.3.21 Resource Information
|
This element is used to indicate the interference level for each of the idle channels of a TRX. 8 7 6 5 4 3 2 1 Element identifier 1 Length 2 Channel Number (1) 3 Interference level (1) 4 Channel Number (N) N-1 Interference level (N) N The Length field indicates in binary the remaining length of the element (octets 3-N). Octets 3-N forms a list of Channel Numbers and Interference levels measured on the corresponding channel. The Channel Number octet is coded as octet 2 of the Channel Number information element, subclause 9.3.1. The Interference Level octet is coded as follows: 8 7 6 5 4 3 2 1 Interf Band Reserved for future use The Interf Band field (bits 6-8) indicates in binary the interference level expressed as one of five possible interference level bands as defined by O&M. The interference level is averaged over a period of Intave (parameter set by O&M, see GSM 05.08) immediately before the transmission of the RF RESource INDication message. See also GSM 08.08, subclause 3.1.3.1 and GSM 05.08, subclause 3.1 e) of appendix A.
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e1df81e32c85ac85801df65e6181a587
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100 596
|
9.3.22 RLM Cause
|
This element is used to indicate the precise protocol error or the reason for a release on the radio link layer. 8 7 6 5 4 3 2 1 Element identifier 1 Length 2 E Cause Value 3 The Cause Value is a one octet field if the extension bit is set to 0. If the extension bit is set to 1, the Cause Value is a two octet field. ETSI ETSI TS 100 596 V7.4.1 (2000-05) 70 (GSM 08.58 version 7.4.1 Release 1998) The Cause Value field is coded as follows: 8 7 6 5 4 3 2 1 0 0 0 0 0 0 0 0 reserved 0 0 0 0 0 0 0 1 timer T200 expired (N200+1) times 0 0 0 0 0 0 1 0 re-establishment request 0 0 0 0 0 0 1 1 unsolicited UA response 0 0 0 0 0 1 0 0 unsolicited DM response 0 0 0 0 0 1 0 1 unsolicated DM response, multiple frame established state 0 0 0 0 0 1 1 0 unsolicited supervisory response 0 0 0 0 0 1 1 1 sequence error 0 0 0 0 1 0 0 0 U-frame with incorrect parameters 0 0 0 0 1 0 0 1 S-frame with incorrect parameters 0 0 0 0 1 0 1 0 I-frame with incorrect use of M bit 0 0 0 0 1 0 1 1 I-frame with incorrect length 0 0 0 0 1 1 0 0 frame not implemented 0 0 0 0 1 1 0 1 SABM command, multiple frame established state 0 0 0 0 1 1 1 0 SABM frame with information not allowed in this state All other values are reserved for future use.
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e1df81e32c85ac85801df65e6181a587
|
100 596
|
9.3.23 Starting Time
|
This element provides the starting time expressed as FN modulo 42432 (FN is absolute frame number). 8 7 6 5 4 3 2 1 Element identifier 1 T1' T3 (high) 2 T3 (low) T2 3 Octets 2-3 are coded as defined for octets 2-3 of the Starting Time information element of GSM 04.08.
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e1df81e32c85ac85801df65e6181a587
|
100 596
|
9.3.24 Timing Advance
|
This element contains the timing advance to be used by MS in subsequent communications. It is calculated by BTS at the reception of a CHANnel REQuest message (random access burst) or a handover access burst. 8 7 6 5 4 3 2 1 Element identifier 1 Reserved Timing Advance 2 The Timing Advance field contains the timing advance TA as specified in GSM 05.10. Bits 7-8 of octet 2 are reserved for future use.
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e1df81e32c85ac85801df65e6181a587
|
100 596
|
9.3.25 Uplink Measurements
|
This element is used to report the results of the TRX measurements on the uplink radio path of an activated basic radio channel. It is of variable length. 8 7 6 5 4 3 2 1 Element identifier 1 Length 2 rfu DTXd RXLEV─FULL─up 3 Reserved RXLEV─SUB─up 4 Reserved RXQUAL─FULL─up RXQUAL─SUB─up 5 Supplementary 6 Measurement Information N rfu = Reserved for Future Use. The Length field indicates in binary the remaining length of the element (octets 3-N). ETSI ETSI TS 100 596 V7.4.1 (2000-05) 71 (GSM 08.58 version 7.4.1 Release 1998) Octets 3-5 contain results from measurements made by TRX on the uplink. The Supplementary Measurement Information field (octets 6-N) may carry additional operator dependent information. The DTXd field (octet 3) indicates whether DTX was employed by TRX on the downlink transmission during the measurement period. The RXLEV-FULL-up and RXLEV-SUB-up fields (octets 3-4) report the average uplink signal level as measured by TRX over the measurement period on all slots and on a subset of the slots respectively (see GSM 05.08, subclause 8.2). Each field is coded as defined in GSM 05.08, subclause 8.1.4. The RXQUAL-FULL-up and RXQUAL-SUB-up fields (octet 5) report the average uplink quality as measured by TRX over the measurement period on all slots and on a subset of the slots respectively (see GSM 05.08, subclause 8.2). Each field is coded as defined in GSM 05.08, subclause 8.2.4.
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e1df81e32c85ac85801df65e6181a587
|
100 596
|
9.3.26 Cause
|
The cause element is used to indicate the reason for a particular event to have occurred and is coded as shown below. 8 7 6 5 4 3 2 1 Element identifier 1 Length 2 E Cause Value 3 Cause Extension 3a 4 Diagnostic(s) if any N The Length field indicates in binary the remaining length of the element (octets 3-N). The Cause Value is a single octet field (octet 3) if the extension bit E (bit 8) is set to 0. If it is set to 1 then the cause value is a 2 octet field (octets 3 and 3a). The Cause Value is divided into two fields: a class (bits 5-7 of octet 3) and a value within the class (bits 1-4 of octet 3). If the value of the first octet of the cause field is 1XXX 0000 then the second octet is reserved for national applications (XXX will still indicate the class). Diagnostic information is not available for every cause, see the table below. When available, it is coded in the same way as the corresponding information element in clause 9. Inclusion of diagnostics is optional. Classes: Class (000): Normal event Class (001): Normal event Class (010): Resource unavailable Class (011): Service or option not available Class (100): Service or option not implemented Class (101): Invalid message (e.g. parameter out of range) Class (110): Protocol error Class (111): Interworking ETSI ETSI TS 100 596 V7.4.1 (2000-05) 72 (GSM 08.58 version 7.4.1 Release 1998) CAUSE VALUES: Class Value Cause Diagnostics 0 0 0 - - - - Normal Event 0 0 0 0 0 0 0 radio interface failure Channel Number 0 0 0 0 0 0 1 radio link failure Channel Number 0 0 0 0 0 1 0 handover access failure Channel Number 0 0 0 0 0 1 1 talker access failure Channel Number 0 0 0 0 1 0 0 reserved for international use 0 0 0 0 1 0 1 reserved for international use 0 0 0 0 1 1 0 reserved for international use 0 0 0 0 1 1 1 O&M intervention 0 0 0 1 0 0 0 reserved for international use 0 0 0 1 : : : 0 0 0 1 1 1 0 0 0 0 1 1 1 1 normal event, unspecified 0 0 1 - - - - Normal Event 0 0 1 0 0 0 0 reserved for international use 0 0 1 0 : : : 0 0 1 0 1 1 1 0 0 1 1 0 0 0 reserved for national use 0 0 1 1 : : : 0 0 1 1 1 1 1 0 1 0 - - - - Resource unavailable 0 1 0 0 0 0 0 equipment failure 0 1 0 0 0 0 1 radio resource not available Channel Number 0 1 0 0 0 1 0 terrestrial channel failure Channel Number 0 1 0 0 0 1 1 CCCH overload Channel Number 0 1 0 0 1 0 0 ACCH overload Channel Number 0 1 0 0 1 0 1 processor overload 0 1 0 0 1 1 0 reserved for international use 0 1 0 0 1 1 1 BTS not equipped 0 1 0 1 0 0 0 remote transcoder failure Channel Number 0 1 0 1 0 0 1 notification overflow Channel Number 0 1 0 1 0 1 0 reserved for international use 0 1 0 1 0 1 1 reserved for international use 0 1 0 1 1 0 0 reserved for national use 0 1 0 1 1 0 1 reserved for national use 0 1 0 1 1 1 0 reserved for national use 0 1 0 1 1 1 1 resource not available, unspecified 0 1 1 - - - - Service or Option Not Available 0 1 1 0 0 0 0 requested transcoding/rate adaption not available Channel Number 0 1 1 0 0 0 1 reserved for international use 0 1 1 : : : : 0 1 1 1 1 1 0 0 1 1 1 1 1 1 service or option not available, unspecified ETSI ETSI TS 100 596 V7.4.1 (2000-05) 73 (GSM 08.58 version 7.4.1 Release 1998) Class Value Cause Diagnostics 1 0 0 - - - - Service or Option Not Implemented 1 0 0 0 0 0 0 encryption algorithm not implemented Channel Number 1 0 0 0 0 0 1 reserved for international use 1 0 0 0 : : : 1 0 0 0 1 1 1 1 0 0 1 0 0 0 reserved for national use 1 0 0 1 : : : 1 0 0 1 1 1 0 1 0 0 1 1 1 1 service or option not implemented, unspecified 1 0 1 - - - - Invalid Message 1 0 1 0 0 0 0 radio channel already activated/allocated Channel Number 1 0 1 0 0 0 1 reserved for international use 1 0 1 0 : : : 1 0 1 0 1 1 1 1 0 1 1 0 0 0 reserved for national use 1 0 1 1 : : : 1 0 1 1 1 1 0 1 0 1 1 1 1 1 invalid message, unspecified 1 1 0 - - - - Protocol Error 1 1 0 0 0 0 0 message discriminator error Message Discrim 1 1 0 0 0 0 1 message type error Message Type 1 1 0 0 0 1 0 message sequence error Message Type 1 1 0 0 0 1 1 general information element error 1 1 0 0 1 0 0 mandatory information element error Element Identif 1 1 0 0 1 0 1 optional information element error Element Identif 1 1 0 0 1 1 0 information element non-existent Element Identif 1 1 0 0 1 1 1 information element length error Element Identif 1 1 0 1 0 0 0 invalid information element contents Inform. Element 1 1 0 1 0 0 1 reserved for international use 1 1 0 1 0 1 0 reserved for international use 1 1 0 1 0 1 1 reserved for international use 1 1 0 1 1 0 0 reserved for national use 1 1 0 1 1 0 1 reserved for national use 1 1 0 1 1 1 0 reserved for national use 1 1 0 1 1 1 1 protocol error, unspecified 1 1 1 - - - - Interworking 1 1 1 0 0 0 0 reserved for international use 1 1 1 0 : : : 1 1 1 0 1 1 1 1 1 1 1 0 0 0 reserved for national use 1 1 1 1 : : : 1 1 1 1 1 1 0 1 1 1 1 1 1 1 interworking, unspecified ETSI ETSI TS 100 596 V7.4.1 (2000-05) 74 (GSM 08.58 version 7.4.1 Release 1998)
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e1df81e32c85ac85801df65e6181a587
|
100 596
|
9.3.27 Measurement result number
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This element is used by BTS to number, (on a channel), the measurement result messages sent to BSC. It is set to 0 at activation time of the channel. The numbering is modulo 256. 8 7 6 5 4 3 2 1 Element identifier 1 Measurement result number 2
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e1df81e32c85ac85801df65e6181a587
|
100 596
|
9.3.28 Message Identifier
|
This element is used to indicate a message type within a message. 8 7 6 5 4 3 2 1 Element identifier 1 Message Type 2 Octet 2 is coded as the Message Type information element, subclause 9.2.
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e1df81e32c85ac85801df65e6181a587
|
100 596
|
9.3.29 SACCH Information
|
This element is used to carry the SACCH filling information (System Information messages, or EXTENDED MEASUREMENT ORDER message) that is to be used on a specific channel. 8 7 6 5 4 3 2 1 Element identifier 1 Length 2 Number of messages 3 Type of 1st message 4 Length of 1st message 5 1st message j Type of n'th message l Length of n'th message l+1 N n'th message The Length field (octet 2) indicates in binary the total remaining length of the element (octets 3 - N). The Number of SI messages field (octet 3) indicates in binary the number of messages contained in the element. The coding of each of these messages consists of a type field (Type of n’th msg), a length field (Length of n’th message) and a message field (n’th message). The "Type of n’th msg" field indicates the type of SYSTEM INFORMATION, or an EXTENDED MEASUREMENT ORDER message that follows in the "n’th message" field. It is coded as follows: Value Message 0 0 0 0 0 1 0 1 SYSTEM INFORMATION 5 0 0 0 0 0 1 1 0 SYSTEM INFORMATION 6 0 0 0 0 1 1 0 1 SYSTEM INFORMATION 5bis 0 0 0 0 1 1 1 0 SYSTEM INFORMATION 5ter 0 1 0 0 0 1 1 1 EXTENDED MEASUREMENT ORDER All other values are reserved. The "Length of n’th SI message" field indicates in binary the length of the "n’th message" field that follows. The "n’th message" field contains a complete SACCH message as defended in GSM 04.08. ETSI ETSI TS 100 596 V7.4.1 (2000-05) 75 (GSM 08.58 version 7.4.1 Release 1998)
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e1df81e32c85ac85801df65e6181a587
|
100 596
|
9.3.30 System Info Type
|
This element is used to indicate the type of SYSTEM INFORMATION message or an EXTENDED MEASUREMENT ORDER message as defined in GSM 04.08 . 8 7 6 5 4 3 2 1 Element identifier 1 Sys Info Type 2 The Sys Info Field (octet 2) indicates the type of message. It is coded as follows: Value Message 0 0 0 0 0 0 0 0 SYSTEM INFORMATION 8 0 0 0 0 0 0 0 1 SYSTEM INFORMATION 1 0 0 0 0 0 0 1 0 SYSTEM INFORMATION 2 0 0 0 0 0 0 1 1 SYSTEM INFORMATION 3 0 0 0 0 0 1 0 0 SYSTEM INFORMATION 4 0 0 0 0 0 1 0 1 SYSTEM INFORMATION 5 0 0 0 0 0 1 1 0 SYSTEM INFORMATION 6 0 0 0 0 0 1 1 1 SYSTEM INFORMATION 7 0 0 0 0 1 0 0 0 SYSTEM INFORMATION 16 0 0 0 0 1 0 0 1 SYSTEM INFORMATION 17 0 0 0 0 1 0 1 0 SYSTEM INFORMATION 2bis 0 0 0 0 1 0 1 1 SYSTEM INFORMATION 2ter 0 0 0 0 1 1 0 1 SYSTEM INFORMATION 5bis 0 0 0 0 1 1 1 0 SYSTEM INFORMATION 5ter 0 0 0 0 1 1 1 1 SYSTEM INFORMATION 10 0 1 0 0 0 1 1 1 EXTENDED MEASUREMENT ORDER All other values are reserved.
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e1df81e32c85ac85801df65e6181a587
|
100 596
|
9.3.31 MS Power Parameters
|
This element carries the parameters required by TRX for MS power control. 8 7 6 5 4 3 2 1 Element identifier 1 Length 2 MS Power Control 3 Parameters N The MS Power Control Parameters field contains the parameters and limits required when MS power control is to be performed by BTS. The coding is operator dependant. Examples of possible parameters and algorithms can be found in GSM 05.08 (RXLEV, RX-QUAL-FULL, RX-QUAL-SUB, DISTANCE (Timing Advance) etc.).
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e1df81e32c85ac85801df65e6181a587
|
100 596
|
9.3.32 BS Power Parameters
|
This element carries the parameters required by TRX for control of its own transmission power. 8 7 6 5 4 3 2 1 Element identifier 1 Length 2 BS Power Control 3 Parameters N The BS Power Control Parameters field contains the parameters and limits required when TRX transmission power control is to be performed by BTS. The coding is operator dependant. Examples of possible parameters and algorithms can be found in GSM 05.08 (RXLEV, RX-QUAL-FULL, RX-QUAL-SUB, DISTANCE (Timing Advance) etc.). ETSI ETSI TS 100 596 V7.4.1 (2000-05) 76 (GSM 08.58 version 7.4.1 Release 1998)
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e1df81e32c85ac85801df65e6181a587
|
100 596
|
9.3.33 Pre-processing Parameters
|
This element contains the parameters required by BTS for the pre-processing of radio measurement data. 8 7 6 5 4 3 2 1 Element identifier 1 Length 2 reserved for future use P 3 Pre-processing 4 Parameters N The P bit (bit 1 of octet 3) indicates whether pre-processing is to be used and it is coded as follows: 0 use the basic measurement reporting procedure (report raw data); 1 use the pre-processed measurement reporting procedure. If pre-processing is to be used, the Pre-processing Parameters field (octets 4-N) contains the parameters required by BTS. The coding of this field is operator dependant.
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e1df81e32c85ac85801df65e6181a587
|
100 596
|
9.3.34 Pre-processed Measurements
|
This element is used by BTS to report the results of the pre-processing of radio measurement data. 8 7 6 5 4 3 2 1 Element identifier 1 Length 2 Pre-processed 3 Measurements N The Pre-processed Measurements field (octets 3-N) contains the results of the pre-processing in BTS. The coding of this field is operator dependant.
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e1df81e32c85ac85801df65e6181a587
|
100 596
|
9.3.35 Full Immediate Assign Info
|
This element is used to convey a full L3 immediate assign message (3 types). 8 7 6 5 4 3 2 1 Element identifier 1 Length Indicator 2 Full Immediate 3 Assign Info 25 The Length Indicator field (octet 2) indicates in binary the remaining length of the element (octets 3-25). The Full Immediate Assign Info field (octets 3-25) contains a complete immediate assign message (IMMEDIATE ASSIGN or IMMEDIATE ASSIGN EXTENDED or IMMEDIATE ASSIGN REJECT) as defined in GSM 04.08. ETSI ETSI TS 100 596 V7.4.1 (2000-05) 77 (GSM 08.58 version 7.4.1 Release 1998)
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e1df81e32c85ac85801df65e6181a587
|
100 596
|
9.3.36 SMSCB Information
|
This element is used to convey a complete frame to be broadcast on the CBCH including the Layer 2 header for the radio path. 8 7 6 5 4 3 2 1 Element identifier 1 SMSCB frame 2 24
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e1df81e32c85ac85801df65e6181a587
|
100 596
|
9.3.37 MS Timing Offset
|
The information is coded in two octets and contains the MS Timing Offset as measured by the BTS. 8 7 6 5 4 3 2 1 Element identifier 1 Timing Offset 2 The meaning of the MS Timing Offset is as defined in GSM 05.10. The value of MS Timing Offset is the binary value of the 8-bit Timing Offset field (octet 2) - 63. The range of MS Timing Offset is therefore -63 to 192.
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e1df81e32c85ac85801df65e6181a587
|
100 596
|
9.3.38 Erroneous Message
|
This information element is used to carry a complete A-bis interface message which was considered erroneous at reception. 8 7 6 5 4 3 2 1 Element identifier 1 Length 2 Received Message 3 N The Received Message field contains a complete A-bis interface L3 message as defined in clause 8 of this GTS, including Message Discriminator and Message Type.
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e1df81e32c85ac85801df65e6181a587
|
100 596
|
9.3.39 Full BCCH Information (message name)
|
This information element contains a complete L3 message as specified in GSM 04.08. 8 7 6 5 4 3 2 1 Element identifier 1 Length Indicator 2 Layer 3 message 3 as 4 defined in GSM GSM 04.08 25 The Length Indicator field (octet 2) indicates in binary the remaining length of the element (octets 3-25). The most significant bit is bit 8 of octet 2 and the least significant bit is bit 1 of octet 2. Octets 3-25 contain the complete L3 message as defined in GSM 04.08. In the message format section, the GSM 04.08 message name to be included is indicated within brackets. ETSI ETSI TS 100 596 V7.4.1 (2000-05) 78 (GSM 08.58 version 7.4.1 Release 1998)
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e1df81e32c85ac85801df65e6181a587
|
100 596
|
9.3.40 Channel Needed
|
This information element is used to indicate to the mobile station which channel will be needed for the transaction linked to the paging procedure. 8 7 6 5 4 3 2 1 Element identifier 1 Reserved for future use Channel 2 The Channel Field (bits 1-2 of octet 2) indicates the further combination of channel which will be needed. It is coded as follows: Value Channel Needed. 0 0 Any Channel. 0 1 SDCCH. 1 0 TCH/F (Full rate). 1 1 TCH/F or TCH/H (Dual rate).
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e1df81e32c85ac85801df65e6181a587
|
100 596
|
9.3.41 CB Command type
|
This element is used to indicate the type of broadcast requested. 8 7 6 5 4 3 2 1 Element identifier 1 Command Default Broadcast 0 Spare Last Block 2 The Command Field (bits 5 to 8) indicates the command to be performed. It is coded as follows: Value Command 0 0 0 0 Normal message Broadcast. 1 0 0 0 Schedule message Broadcast. 1 1 1 0 Default message Broadcast. 1 1 1 1 Null message Broadcast. All other values are reserved. When the Command Field is different from the value 1110 (Default message Broadcast), the BTS uses the SMSCB message IE together with the Command Field and the Last Block Field to build the blocks sent on the Radio interface, as defined by GSM 04.12. In that case bit 4 is ignored. When the Command Field takes the value 1110 (Default message Broadcast), the BTS uses the SMSCB message IE together with the Default Broadcast Field and the Last Block Field to build the blocks sent on the Radio interface, as defined by GSM 04.12. The Default Broadcast Field (bit 4) is coded as follows: Value Default message to be broadcast 0 Normal message. 1 Null message. The BTS uses the Last Block Field to signal to the MS the last block containing useful information as defined by GSM 04.12. This Field (bits 1 and 2) is coded as follows: Value Last Block containing useful information 00 Block 4 01 Block 1 10 Block 2 11 Block 3 ETSI ETSI TS 100 596 V7.4.1 (2000-05) 79 (GSM 08.58 version 7.4.1 Release 1998)
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e1df81e32c85ac85801df65e6181a587
|
100 596
|
9.3.42 SMSCB Message
|
This element is used to convey the message to be broadcast on the CBCH. 8 7 6 5 4 3 2 1 Element identifier 1 Length 2 SMSCB Message 3 N
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e1df81e32c85ac85801df65e6181a587
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100 596
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9.3.43 CBCH Load Information
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This information element is used to indicate to the BSC the load situation of CBCH in the BTS. 8 7 6 5 4 3 2 1 Element identifier 1 CBCH Load Type Spare Message Slot Count 2 The CBCH Load Type field (bit 8 of octet 2) indicates either an underflow or an overflow situation of the CBCH in the BTS. It is coded as follows: Value CBCH Load Type 0 Underflow 1 Overflow The Message Slot Count field (bits 1-4 of octet 2) indicates either the amount of SMSCB messages that are needed immediately by BTS or the amount of delay in message slots that is needed immediately by BTS depending on the value of the CBCH Load Type field. It is coded as follows: CBCH Load Type Message Slot Count 0 indicates the amount of SMSCB messages (1-15) that are needed immediately by BTS. 1 indicates the amount of delay in message slots (1-15) that is needed immediately by BTS.
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