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cdfbc793b22dba975ca2a8fa9f7f80c7 | 100 615 | 4.4.3 Scan report notification | The "scanReport" notification will be supported in the PLMN measurement system as defined in subclause 4.2.1.4 and CCITT Recommendation X.738 [19]. |
cdfbc793b22dba975ca2a8fa9f7f80c7 | 100 615 | 4.4.4 Activate scan report action | In the scope of the present document, there are no specific conformance requirements for the action request. The action reply will be supported according to the requirements for the scan report notification. |
cdfbc793b22dba975ca2a8fa9f7f80c7 | 100 615 | 4.5 Application Context | The Application Context Name of the 12.04 application context shall have the following object identifier value: {gsm-OM-DomainId gsm-12-04 (4) protocolSupport (1) applicationContext (0) gsm-Management (0)} and the following object description value: "gsm12.04 management application context" The object identifier gsm-OM... |
cdfbc793b22dba975ca2a8fa9f7f80c7 | 100 615 | 5 Future Enhancements | The simple scanner can scan an attribute, but is unable to perform any calculations on it. This means that the simple scanner is unable to apply any algorithm on any attribute to derive a master value, e.g. a calculation of the mean value. Therefore, within the present document, an approach has been chosen where the at... |
6ce15bf95a1b22a297ad4f2826214f21 | 100 594 | 1 Scope | The use and general aspects of the A-bis interface are given in Technical Specification GSM 08.51. The present document defines the structure of the physical layer (layer 1) of the BSC - BTS/TRX interface for supporting traffic channels and control channels. Use of the physical layer for supporting link protocol is cov... |
6ce15bf95a1b22a297ad4f2826214f21 | 100 594 | 2 References | The following documents contain provisions which, through reference in this text, constitute provisions of the present document. • References are either specific (identified by date of publication, edition number, version number, etc.) or non-specific. • For a specific reference, subsequent revisions do not apply. • Fo... |
6ce15bf95a1b22a297ad4f2826214f21 | 100 594 | 3 Abbreviations | Abbreviations used in the present document are listed in GSM 01.04 |
6ce15bf95a1b22a297ad4f2826214f21 | 100 594 | 4 Layer 1 specification | All the CCITT recommendations referred to are Blue Book. Layer 1 shall utilize digital transmission at a rate of 2 048 kbit/sec with a frame structure of 32 * 64 kbit/sec time slots, as specified in CCITT Recommendation G.705 section 3 or at a rate of 64 kbit/sec. The physical/electrical characteristics are defined in ... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 1 Scope | The use and general aspects of the Base Station Controller (BSC) to Base Station Transceiver (BTS) interface (the A-bis interface) are given in GSM 08.51. The present document specifies the general structure of layer 3 and traffic management procedures and messages used on the A-bis interface to support signalling proc... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 1.1 References | The following documents contain provisions which, through reference in this text, constitute provisions of the present document. • References are either specific (identified by date of publication, edition number, version number, etc.) or non-specific. • For a specific reference, subsequent revisions do not apply. • Fo... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 1.2 Abbreviations | Abbreviations used in the present document are listed in GSM 01.04. |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 2 Protocol model | A model for L3 can be found in figure 2.1. L2 addressing is made to TRX (or BCF) using the TEI of LAPD. Different L2 links are used for traffic management messages (RSL, Radio Signalling Link), network management messages (OML, Operation & Maintenance Link) and L2 management messages (L2ML, Layer 2 Management Link). Fo... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 3 Radio Link Layer Management Procedures | This clause describes procedures related to the management of a link layer connection on the radio path. |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 3.1 Link establishment indication | This procedure is used by BTS to indicate to BSC that a layer 2 link on the radio path has been established in multi- frame mode at the initiative of an MS. BSC can use this indication to set up an SCCP connection to MSC. Upon reception of a SABM frame on a link on an active channel, the BTS sends an ESTablish INDicati... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 3.2 Link establishment request | This procedure is used by BSC to request the establishment of a link layer connection in multi-frame mode on the radio path. The procedure is started by BSC sending an ESTablish REQuest message to BTS. BTS then establishes the link by sending an SABM frame. Upon reception of the acknowledgement (UA-frame) from MS, BTS ... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 3.3 Link release indication | This procedure is used by BTS to indicate to BSC that a link layer connection on the radio path has been released at the initiative of an MS. When receiving a DISC frame on a link layer connection in multi-frame mode, BTS sends a RELease INDication message to BSC. (If the link layer is in idle mode, BTS will send a DM ... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 3.4 Link release request | This procedure is used by BSC to request the release of a link layer connection on the radio path. The procedure is started by BSC sending a RELease REQuest message to BTS. BTS then sends a DISC frame to MS. When it has received the acknowledgement (UA or DM frame), BTS sends a RELease CONFirm message to BSC. Collision... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 3.9 Link error indication | This procedure is used by BTS to indicate an abnormal case such as the following. - a protocol error as specified in GSM 04.06, subclauses 5.6.4, 5.7.3 and annex G; - a link layer failure, i.e. the repetition of an I-frame N200 times without an acknowledgement; - the repetition of an SABM or DISC frame N200 times witho... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 4 Dedicated channel management procedures | |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 4.1 Channel activation | This procedure is used to activate a channel at the BTS for an MS which later will be commanded to this channel by an IMMediate ASSIGN, an ASSIGN CoMmanD, an ADDitional ASSIGNment; a NOTIFICATION, a CHANNEL RELEASE (with a Channel description) a HANDOver CoMmanD or a CONFiguration CHange CoMmanD message. In the handove... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 4.1.1 Signalling Procedure | BSC determines what channel shall be used and starts up that channel at BTS by sending a CHANnel ACTIVation message to the relevant TRX. This message contains the reason for the activation (immediate assignment, assignment, asynchronous/synchronous handover, additional assignment, activation of a secondary channel in a... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 4.1.2 Activation for Intra-Cell Channel Change | This activation precedes the Immediate Assignment, Assignment or Additional assignment procedures. The Timing Advance element must be included in the CHANNEL ACTIVATION message. BTS activates the channel and starts transmission and reception on the main channel in the indicated mode. Ciphering is started if so indicate... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 4.1.3 Activation for Asynchronous Handover | BTS starts transmission immediately on the main channel in the indicated mode and with encryption if so indicated. If the MS Power element is present the BTS may start transmission also on the SACCH. When receiving a correct access burst with the correct handover reference, BTS starts the normal reception process on th... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 4.1.4 Activation for Synchronous Handover | BTS starts transmission immediately on the main channel in the indicated mode and with encryption if so indicated. If the MS Power and Timing Advance element are present, BTS shall start transmission also on SACCH with the timing advance and MS power control parameters indicated. If only the MS power element is present... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 4.1.5 Activation for Secondary Channels in Multislot Configuration | BTS activates the channel and starts transmission and reception on the traffic and SACCH channels in the indicated mode. Ciphering is applied if so indicated in the encryption information. If the BS and/or MS power elements and/or the Physical Context element are present, the reception if applicable and transmission pr... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 4.1.6 Channel reactivation | This procedure is used by BSC to request a reactivation of an active channel. During the reactivation, information flows, e.g., user information such as speech or data, that are common for the two phases of operation, are not interrupted. BSC initiates the procedure by sending a CHANNEL ACTivation message to BTS where ... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 4.2 Channel MODE MODIFY | This procedure is used by BSC to request a change of the channel mode and/or a change between uni-directional and bi- directional channel types of an active channel. In addition, for secondary channels in a multislot configuration, the procedure can be used by BSC to request a change in the encryption information of an... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 4.3 Handover detection | This procedure is used between the target BTS and BSC when a handed over MS accesses the new BTS. The procedure is initiated by BTS upon detection of an MS on a channel activated for handover as described in subclause 4.1.3 for the asynchronous handover and in subclause 4.1.4 for synchronous handover. In case of an asy... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 4.4 Start of encryption | This procedure is used to start encryption according to the procedure defined in GSM 04.08. The procedure is initiated by BSC upon reception of the CIPHER MODE COMMAND message from MSC (see GSM 08.08). ETSI ETSI TS 100 596 V7.4.1 (2000-05) 17 (GSM 08.58 version 7.4.1 Release 1998) BSC sends the ENCRyption CoMmanD messa... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 4.5 Measurement reporting | These procedures are used to report to BSC all parameters and measurement results required by BSC for handover requirement determination. One procedure is also used to report to the BSC extended measurements made by Mobile Stations. MS measures downlink received signal level and quality from the serving cell and receiv... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 4.5.1 Basic measurement reporting | This procedure is used by BTS to report the results of the basic radio measurements made by MS and TRX according to GSM 05.08 and GSM 05.05. The support of this procedure is mandatory in all BTS:s and all BSC:s. It is the default procedure to use unless otherwise indicated (see subclause 4.5.2.1). TRX reports all these... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 4.5.2 Measurement pre-processing | These additional and optional procedures are included to support some pre-processing in BTS of radio measurement data. When used, they may replace the basic procedure defined in subclause 4.5.1. However, it shall be possible to change back to the basic procedure. Pre-processing in BTS must not affect the procedures on ... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 4.5.2.1 Pre-processing configuration | This procedure is used by BSC to modify the pre-processing parameters according to reported communication conditions (e.g. degradation of the communication). In order to change the parameters, BSC sends a PREPROCESS CONFIGURE message to BTS. A parameter setting in the PREPROCESS CONFIGURE message indicates if the basic... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 4.5.2.2 Pre-processed measurement reporting | This procedure is used by BTS to report the results of measurement pre- processing. To report the results, BTS sends a PREPROCESSED MEASUREMENT RESULT message to BSC. The conditions to send the message are set in the PREPROCESS CONFIGURE message. |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 4.5.3 Extended measurement reporting | This procedure is used by BTS to report the results of the extended measurements made by MS according to GSM 05.08. If an uplink SACCH block contains an EXTended MEASurement REPort from MS, it shall be forwarded to the BSC using the same procedure as when reporting regular measurement reports from an MS. Though, no mea... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 4.6 Deactivate SACCH | This procedure is used by BSC to deactivate the SACCH at BTS according to the Channel Release procedure defined in GSM 04.08. When sending the Channel Release message to MS, BSC also sends the DEACTIVATE SACCH message to BTS to deactivate the SACCH (see GSM 04.08, Channel Release procedure). |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 4.7 Radio channel release | This procedure is used by BSC to release a radio channel which is no longer needed. When an activated radio channel is no longer needed, BSC sends an RF CHANnel RELease message to the relevant TRX and channel. After having released the addressed resources, the BTS sends a RF CHANnel RELease ACKnowledge to BSC. |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 4.8 MS power control | This procedure is used by BSC to set the MS power level or the parameters required by TRX for the control of MS power. The initial parameters are set by BSC in the CHANNEL ACTIVATION message (see Channel Activation procedure). If these parameters are to be changed for an active channel, BSC sends a MS POWER CONTROL mes... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 4.9 Transmission power control | This is an optional procedure which is used between BSC and BTS to set the TRX transmission power level or the parameters required by TRX for the control of TRX transmission power. The initial parameters are set by BSC in the CHANNEL ACTIVATION message (see Channel Activation procedure). If these parameters are to be c... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 4.10 Connection failure | This procedure is used by BTS to indicate to BSC that an active connection has been broken (e.g. due to a radio link failure as defined in GSM 05.08). When BTS detects that a connection has been broken, BTS sends a CONNection FAILure INDication message to BSC with the most proper cause value. Further actions are define... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 4.11 Physical context request | This is an optional procedure which allows the BSC to obtain information on the "physical context" of a radio channel just prior to a channel change. This information may be forwarded to the new TRX (possibly in another collocated cell). The procedure is initiated by BSC sending a PHYsical CONTEXT REQuest message to TR... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 4.12 SACCH information modify | This procedure is used by the BSC to modify the SACCH filling information (System Information) sent on an individual SACCH channel. For this purpose, the BSC sends a SACCH INFO MODIFY message to the BTS. The SACCH filling information as given in the SACCH INFO MODIFY message shall be used on the indicated channel until... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 4.13 Talker detection | The procedure is used by the BTS during the period the channel is activated for a voice group call. Upon detection of an MS on a channel activated for group call as specified in subclause 4.1, the BTS builds the VGCS UPLINK GRANT message as specified in GSM 04.08, sends the message to the MS in unacknowledged mode on t... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 4.14 Listener detection | The procedure is used by the BTS during the period the channel is activated for a voice group call. Upon detection of an uplink access having the value reserved for replying to an uplink access request as specified in subclause 4.1. The BTS builds the LISTENER DETection message and sends the message to the BSC. This me... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 4.15 Remote Codec Configuration | This procedure is used by the BTS to report to the BSC the codec information received from the remote BSS prior to a MultiRate Codec TFO establishment or within TFO. This information can be used by the BSC to solve potential codec type and codec mode mismatches. ETSI ETSI TS 100 596 V7.4.1 (2000-05) 23 (GSM 08.58 versi... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 4.16 Round Trip Delay Report | This procedure is used by the BTS to report to the BSC the BTS to Transcoder or BTS to Remote BTS round trip transmission delay. This information can be used by the BSC to set the correct timing for a pre-handover warning and to optimise the AMR Configuration and/or Adaptation algorithm. |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 4.17 Pre-handover Warning | This procedure is used by the BSC to notify the serving BTS that a handover is going to be performed and allow the serving BTS to take the necessary steps in preparation of the handover (adaptation freezing for MultiRate Codec, TFO discontinuation,….). The Pre-handover Warning may disable (withdraw the “general authori... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 4.18 MultiRate Codec Configuration Change | This procedure is used by the BSC to authorise the BTS to change the MultiRate Codec Configuration to solve a codec mismatch prior to TFO establishment or within TFO. The BTS shall use the RATSCCH inband signalling with the MS as defined by Rec GSM 05.09. Once the MultiRate Codec Configuration has been changed, the BTS... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 4.19 MultiRate Codec Configuration Change Performed | This procedure is used by the BTS to report to the BSC that a MultiRate Codec Modification was performed using the RATSCCH in-band signalling capability. The BTS shall report the MultiRate codec configuration after the completion of the procedure. |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 4.20 TFO Report | This procedure is used by the BTS to report to the BSC that TFO (based on AMR) is established, or is not in operation anymore. |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 4.21 TFO Modification Request | This procedure is used by the BSC to change the TFO configuration while operating with AMR: enabling or disabling TFO. This procedure shall be used only during an established call. At call setup, Channel Activation procedure shall be used. During an in-call modification from data to speech, Mode Modify procedure shall ... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 5 Common channel management procedures | |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 5.1 Channel request by MS | The procedure is initiated by TRX upon detection of a random access from an MS (CHANnel REQuest message from MS). TRX then sends a CHANnel ReQuireD message to BSC containing the Request Reference parameter (random number selected by MS plus some low order bits of the TDMA frame number for the access) and the measured d... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 5.2 Paging | This procedure is used to request the paging of one mobile station on a given paging subchannel. The paging of an MS is initiated by BSC sending a PAGing CoMmanD message to BTS. The message contains the MS identity (TMSI or IMSI), the paging population number of the MS, optionally an indication for the MS about which c... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 5.3 Delete indication | This procedure is used by BTS to indicate that due to overload on the downlink CCCH, an IMMEDIATE ASSIGN COMMAND has been deleted. For that purpose BTS sends a DELETE INDication message to BSC. ETSI ETSI TS 100 596 V7.4.1 (2000-05) 26 (GSM 08.58 version 7.4.1 Release 1998) |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 5.4 CCCH load indication | This procedure is used by a BTS to inform the BSC of the load on a particular CCCH timeslot. The CCCH LOAD INDication message is sent regularly from BTS to BSC if the load exceeds some value set by O&M. The sending rate is also set by O&M. |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 5.5 Broadcast information modify | This procedure is used by BSC to indicate to BTS the new information to be broadcast on BCCH. For that purpose, BSC sends a BCCH INFOrmation message to BTS. |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 5.6 Short Message Cell Broadcast | Short Message Service Cell Broadcast messages are sent to BTS as SMS BROADCAST REQUEST or SMS BROADCAST COMMAND messages. With the SMS BROADCAST REQUEST mode of operation, the BSC handles the queuing, repetition and transmission of the messages taking the capacity of the CBCHs (basic and extended channel (see GSM 05.02... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 5.7 IMMEDIATE ASSIGNMENT | This procedure is used by BSC to request the transmission of an immediate assign message on downlink CCCH. To initiate the immediate assign, the BSC sends an IMMEDIATE ASSIGN COMMAND message. The message contains the complete immediate assign message as defined in GSM 04.08 (IMMEDIATE ASSIGNMENT or IMMEDIATE ASSIGNMENT... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 5.8 Notification | This procedure is used to request that notification be performed by the BTS. The BSC indicates the exact action required by the BTS in the command indicator. The NOTIFication messages to be sent on the radio path are built and sent by BTS. The BSC manages the NCH DRX information whilst the BTS manages the scheduling of... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 6 TRX management procedures | |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 6.1 Radio resource indication | This procedure is used to inform BSC on the interference levels on idle channels of a TRX. In the RF RESource INDication message, TRX reports the interference level for each of the channels which have been idle (not active) for the whole measurement period. See also GSM 08.08, subclause 3.1.3.1 and GSM 05.08, subclause... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 6.2 SACCH filling information modify | This procedure is used by BSC to indicate to BTS the new information to be used as filling information on SACCHs. For that propose BSC sends a SACCH FILLing message to BTS. |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 6.3 Flow control | This procedure is defined to give some degree of flow control. It can be used for TRX processor overload, downlink CCCH overload and ACCH overload. The algorithm used in BSC to control the traffic flow is as follows. Upon receipt of the first OVERLOAD message, BSC reduces the traffic by one step and starts timers T1 an... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 6.4 Error reporting | This procedure is used by BTS to report detected errors as described in clause 7 below if they cannot be reported by any other procedure. When TRX detects the reception of an erroneous message, it sends an ERROR REPORT message to BSC with the most appropriate cause value. In order to identify the erroneous message, the... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 6a Location services procedures | These procedures are related to Location Services (LCS). |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 6a.1 LLP message transport | This procedure is used to convey LLP messages between the BTS-or Standalone Type B LMU and the BSC, as defined in the Location Services (LCS) Stage 2 document GSM 03.71. The sending entity (BSC, Standalone Type B LMU or BTS) sends a Location Information message containing an embedded LLP message to the receiving entity... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 7 Error handling | |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 7.1 General | The procedures specified above apply to those messages which pass the checks described below. The behaviour of BSC in erroneous cases is implementation dependent. The behaviour of BTS in erroneous cases is to ignore the message and to send a report to BSC. The report can be sent in either of the following messages: - C... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 7.2 Message discriminator error | A message with a non-specified message discriminator is erroneous. |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 7.3 Message type error | A message with a non-specified message type is considered correct, but is ignored by BTS. |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 7.4 Message sequence error | A message with an existing message type which is not possible according to the specification and to the state of the BTS is erroneous. |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 7.5 General information element errors | This category includes: - information element out of sequence; - abnormally duplicated element; - missing element. A message with such an error is erroneous. |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 7.6 Mandatory information element errors | This includes: a) non-existing element type; b) information length error; c) content which does not comply with the specification (value reserved for future use is considered as case d)); d) value indicated as reserved for future use; e) bits reserved for future use not set to 0; f) content complying with specification... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 7.7 Optional information element errors | The same categories of errors as in previous subclause apply. In cases other than b), e), f) and g), BTS ignores the element and processes the rest of the message. Cases b), f) and g) are considered erroneous. In case e), BTS ignores the reserved (RFU) bits. ETSI ETSI TS 100 596 V7.4.1 (2000-05) 33 (GSM 08.58 version 7... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 7.8 Conditional information element errors | The same categories of errors as in subclause 7.6 apply. If the conditions for presence of the element are met, the same erroneous cases as in subclause 7.6 apply. If the conditions for presence of the element are not met, the same erroneous cases as in subclause 7.7 apply. |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 8 Message formats and contents | This clause defines the format and contents of the messages sent over the A-bis interface. Similar coding principles as in recs. 04.08 and 08.08 are used. For each message, the contained Information Elements are listed. For each Information Element, the following information is given: - Name of Information Element; - R... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 8.1 Transparent messages | Transparent messages are used at the A-bis interface to convey layer 3 messages for the radio interface as defined in GSM 04.08 and for which BTS has to take or has taken no specific action. The T- bit of the Message Discriminator is set to 1. In the uplink direction (messages from MS), all messages received in I- fram... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 8.2 Non-transparent messages (BSC-BTS specific messages) | These messages are used over the A-bis interface for messages on which BTS has to take some action (BSC to BTS direction) and for messages which are the result from actions taken by BTS (BTS to BSC direction). The T-bit of the Message Discriminator is set to 0. |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 8.3 Radio link layer management messages | These messages are related to Radio Link Layer 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 Link Identifier 9.3.2 M TV 2 (Information elements depending on messag... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 8.3.1 DATA REQUEST | This message is sent from BSC to BTS to request the sending of a message in acknowledged 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... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 8.3.2 DATA INDICATION | This message is sent from BTS to BSC to indicate the reception of a message in acknowledged 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 ... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 8.3.3 ERROR INDICATION | This message is sent from BTS to BSC to indicate an abnormal case for 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 RLM Cause 9.3.22 M TLV 2-4 |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 8.3.4 ESTABLISH REQUEST | This message is sent from BSC to BTS to request the establishment of a multi-frame mode (acknowledged mode) link layer connection on the radio path. 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 |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 8.3.5 ESTABLISH CONFIRM | This message is sent from BTS to BSC to confirm the establishment of a radio link layer connection in multi-frame (acknowledged) mode. 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... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 8.3.6 ESTABLISH INDICATION | This message is sent from BTS to BSC to indicate the establishment of a radio link layer connection in multi-frame mode, initiated by 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 Link Identifier 9.3.2 M TV 2 L3 Information... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 8.3.7 RELEASE REQUEST | This message is sent from BSC to BTS to request 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 Release Mode 9.3.20 M TV 2 |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 8.3.8 RELEASE CONFIRM | 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... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 8.3.9 RELEASE INDICATION | 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 |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 8.3.10 UNIT DATA REQUEST | 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 T... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 8.3.11 UNIT DATA INDICATION | 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 ... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 8.4 DEDICATED CHANNEL MANAGEMENT MESSAGES | 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... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 8.4.9 MODE MODIFY | 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 ... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 8.4.1 CHANNEL ACTIVATION | 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 T... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 8.4.2 CHANNEL ACTIVATION ACKNOWLEDGE | 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 BS... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 8.4.3 CHANNEL ACTIVATION NEGATIVE ACKNOWLEDGE | 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 ... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 8.4.4 CONNECTION FAILURE INDICATION | 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 |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 8.4.5 DEACTIVATE SACCH | 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 |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 8.4.6 ENCRYPTION COMMAND | 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... |
e1df81e32c85ac85801df65e6181a587 | 100 596 | 8.4.7 HANDOVER DETECTION | 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 (20... |
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