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b565fbd182a148565ebdcfaa5e266698 | 100 589 | 6.1.3 Establishment procedure in case iii) | In this case connection establishment is undertaken by the MSC on the reception of a voice group or broadcast call initiation request. At the reception of the voice group or broadcast call establishment request message, the MSC will determine that a voice group or broadcast call is required and retrieve the required in... |
b565fbd182a148565ebdcfaa5e266698 | 100 589 | 6.1.4 Establishment procedure in case iv) | In this case, the connection establishment may be performed at the request of the BSS or MSC. It will normally be as a result of a response to a notification message for a voice group or broadcast call which is received by the BSS. At the reception of the Connection Request message, the MSC may check, based on the rece... |
b565fbd182a148565ebdcfaa5e266698 | 100 589 | 6.2 Connection release | This procedure is always initiated at the MSC side. A connection is released when the MSC realizes that a given signalling connection is no longer required. That may occur, in normal cases: ETSI 33 ETSI TS 100 589 V7.0.1 (1999-07) (GSM 08.06 version 7.0.1 Release1998) - when a BSSAP release procedure is terminated; - w... |
b565fbd182a148565ebdcfaa5e266698 | 100 589 | 6.3 Transfer of DTAP and BSSMAP data | The DTAP and BSSMAP Layer 3 messages between the MSC and the BSS are contained in the user data field of the exchanged SCCP frames. This field is optional for the Connection Request (CR) (except for BSS originated connections, see section 6.1); Connection Confirm (CC) and Connection Refused (CREF). The use of this fiel... |
b565fbd182a148565ebdcfaa5e266698 | 100 589 | 6.3.1 Distribution function | |
b565fbd182a148565ebdcfaa5e266698 | 100 589 | 6.3.1.1 CCITT Recommendation | The distribution of messages between the BSSMAP and DTAP functions and the distribution/multiplexing of DTAP messages to/from the various radio link layer 2 access points are performed in an intermediate layer of protocol between SCCP and Layer 3 later referred as the distribution sublayer. The protocol for this sublay... |
b565fbd182a148565ebdcfaa5e266698 | 100 589 | 6.3.1.2 ANSI Specification | The distribution of messages between the BSSMAP and DTAP functions and the distribution/multiplexing of DTAP messages to/from the various radio link layer 2 access points are performed by a function of BSSAP referred to as a distribution function. The distribution of messages is performed based on a distribution data u... |
b565fbd182a148565ebdcfaa5e266698 | 100 589 | 6.3.2 Transfer of DTAP messages | The DTAP function is in charge of transferring layer 3 messages from the MS (resp from the MSC) to the MSC (resp to the MS) without any analysis of the message contents. The interworking between the layer 2 protocol on the radio side and signalling system 7 at the landside is based on the use of individual SCCP connect... |
b565fbd182a148565ebdcfaa5e266698 | 100 589 | 6.3.3 Transfer of BSSMAP messages | The transfer of BSSMAP messages over a SCCP connection allows the BSSMAP functions in both the MSC and the BSS to identify to which particular Mobile Station association the exchanged message (e.g. assign, handover request, etc..) applies. The structure of the user data field is given in figure 3. The user data field c... |
b565fbd182a148565ebdcfaa5e266698 | 100 589 | 6.4 Connectionless services | Some BSSMAP procedures described in GSM 08.08 use the connectionless services of the SCCP. The structure of the user data field of the unit data message (UDT) is given in figure 3. The user data field contains a distribution data unit, a length indicator, and the actual layer 3 message. The Distribution Data Unit only ... |
b565fbd182a148565ebdcfaa5e266698 | 100 589 | 6.4.1 Discrimination parameter (CCITT Recommendation) | This parameter is coded on one octet, as follows: 8 7 6 5 4 3 2 1 0 0 0 0 0 0 0 D The discrimination bit D is set to the "Not Transparent" value 0. The length indicator is coded in one octet, and is the binary representation of the number of octets of the subsequent layer 3 message parameter. The coding of the BSSMAP l... |
b565fbd182a148565ebdcfaa5e266698 | 100 589 | 6.4.2 Discrimination parameter (ANSI Specification) | This parameter is coded on one octet, as follows: 8 7 6 5 4 3 2 1 X x X x x x x D The discrimination bit D is set to the "BSSMAP" value 0. The bits indicated with X values denote to air interface message groups as shown in the table “Coding Of The Discrimination Parameter for PCS 1900” (see section 6.3.2.2). ETSI ETSI ... |
b565fbd182a148565ebdcfaa5e266698 | 100 589 | 6.4.3 User Data Field Structure | DTAP BSSMAP +-----------------+ +-----------------+ 1 | DISCRIMINATION | 1 | DISCRIMINATION | +-----------------+ +-----------------+ +-----------------+ 2 | DLCI | +-----------------+ ------------------Distribution Data Unit---------------- +-----------------+ +-----------------+ 3 | LENGTH IND L | 2 | LENGTH IND L | ... |
b565fbd182a148565ebdcfaa5e266698 | 100 589 | 7 Use of the SCCP for operations and maintenance | O&M messages have to be passed between the O&M functions and the BSS. If the O&M functions use the MSC-BSS interface to transport messages to the BSS, then the SCCP of No.7 should be used. X25 may also be used for the transfer of O&M messages between BSS and OMC, this is not further considered in this Technical Specifi... |
b565fbd182a148565ebdcfaa5e266698 | 100 589 | 7.1 Connectionless service | The connectionless service of the SCCP is supported at the BSS for management purposes and can be used for the transport of O&M information. Addressing should be decided by the operator and manufacturer (e.g. by E164 number, this may require additional addressing capability at the BSS). Further information is given con... |
b565fbd182a148565ebdcfaa5e266698 | 100 589 | 7.2 Connection oriented services | Connection oriented services are also supported by the BSS for management and call control. Connection oriented services can also be used for the transport of O&M information. In order to set up the connection additional addressing capability may be required at the BSS. To use a signalling connection between the BSS an... |
b565fbd182a148565ebdcfaa5e266698 | 100 589 | 7.3 BSS failure | If a system failure at the BSS occurs then sufficient MTP functions to allow message transmission and reception should be maintained. ETSI 37 ETSI TS 100 589 V7.0.1 (1999-07) (GSM 08.06 version 7.0.1 Release1998) Annex A (informative): Change history TDoc SPEC CR REV PHAS VERS SUBJECT CAT NEW_V P-99-244 08.06 A007 1 R9... |
8b7236eb626bfed891fdc71b1ad04207 | 100 588 | 1 Scope | The present document defines the structure of the physical layer (layer 1) of the BSS-MSC interface for supporting traffic channels. Use of the physical layer for supporting Signalling System No.7 signalling links is covered in Technical Specification GSM 08.06. The physical layer is the lowest layer in the OSI Referen... |
8b7236eb626bfed891fdc71b1ad04207 | 100 588 | 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... |
8b7236eb626bfed891fdc71b1ad04207 | 100 588 | 3 Definitions and abbreviations | Abbreviations used in the present document are listed in GSM 01.04 ETSI ETSI TS 100 588 V7.0.1 (1999-07) 6 (GSM 08.04 version 7.0.1 Release 1998) |
8b7236eb626bfed891fdc71b1ad04207 | 100 588 | 4 Layer 1 Specification | All CCITT recommendations referred to are Blue Book. Layer 1 shall utilise digital transmission - at a rate of 2048 kbit/sec with a frame structure of 32 * 64kbit/sec time slots, as specified in CCITT Recommendation G.705 section 3 for E1 interface, or - at a rate of 1544kbit/sec with a frame structure of 24*64 kbit/s ... |
abd9f7e0eacccd252c5ecb0a8a4dc4d0 | 100 587 | 0 Introduction | |
abd9f7e0eacccd252c5ecb0a8a4dc4d0 | 100 587 | 0.1 Scope | The present document is an introduction to the GSM 08.0X series of Technical Specifications and deals with the definition of the base station system (BSS) to mobile switching centre (MSC) (referred to as the A-interface) defined for the GSM system. It also introduces Technical Specifications in the GSM 08.20 series, de... |
abd9f7e0eacccd252c5ecb0a8a4dc4d0 | 100 587 | 0.2 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... |
abd9f7e0eacccd252c5ecb0a8a4dc4d0 | 100 587 | 0.3 Definitions and abbreviations | Abbreviations used in this specification are listed in GSM 01.04 |
abd9f7e0eacccd252c5ecb0a8a4dc4d0 | 100 587 | 1 A-Interface capabilities | The BSS-MSC interface shall be capable of supporting all the services offered to GSM users and subscribers. In addition it also allows for the allocation of suitable radio resources within the PLMN, and the operation and maintenance of those resources. |
abd9f7e0eacccd252c5ecb0a8a4dc4d0 | 100 587 | 2 A-Interface specification objectives | The MSC to BSS interface specifications shall allow the following: i) Connection of various manufacturers BSSs to the same MSC; ii) The use of several manufacturers MSCs to the same type of BSS; iii) The use of the same BSS in any PLMN; iv) The use of the same MSC in any PLMN; v) The separate evolution of MSC and BSS t... |
abd9f7e0eacccd252c5ecb0a8a4dc4d0 | 100 587 | 3 A-Interface characteristics | The interface is defined to be at the boundary of the MSC. The MSC to BSS interface is specified by a set of characteristics, including: i) Physical and electromagnetic parameters; ii) Channel structures; iii) Network operating procedures; iv) Operation and Maintenance information support. ETSI ETSI TS 100 587 V7.0.0 (... |
abd9f7e0eacccd252c5ecb0a8a4dc4d0 | 100 587 | 4 Other specifications on the MSC-BSS interface | The full structure of the Technical Specifications specifying the MSC to BSS link are as follows: |
abd9f7e0eacccd252c5ecb0a8a4dc4d0 | 100 587 | 4.1 Technical Specification GSM 08.02 Interface Principles | The present document deals with the functional split between the BSS and the MSC. This functional split is then supported by the other Technical Specifications in the GSM 08.0X series. Technical Specification GSM 08.02 also contains some information on the placement of transcoders/rate adapters, these being functionall... |
abd9f7e0eacccd252c5ecb0a8a4dc4d0 | 100 587 | 4.2 Technical Specification GSM 08.04 Layer 1 - Specification | The present document defines the physical layer at the BSS-MSC interface point. The physical interface chosen is a 2Mbits/s (32*64kbits/s) interface according to the standard CCITT recommendations. The speech coding called up in the present document is standard A-law, coding of the traffic bit streams for data calls is... |
abd9f7e0eacccd252c5ecb0a8a4dc4d0 | 100 587 | 4.4 Technical Specification GSM 08.08 Layer 3 Specification | In the present document the application parts are described. There are two currently identified in the BSS to MSC interface protocol, these are the: BSSOMAP; BSSAP. The BSSAP is further subdivided into two subprotocols, the BSSMAP and the DTAP. The BSSMAP and DTAP are fully defined, the BSSOMAP is only supported in ter... |
c03dccd6ab8811300bb2ead5136d757c | 100 573 | 1 Scope | This ETSI Technical Specification (TS) is an introduction to the 05 series of the GSM technical specifications for GSM and DCS 1 800. It is not of a mandatory nature, but consists of a general description of the organization of the physical layer with reference to the technical specifications where each part is specifi... |
c03dccd6ab8811300bb2ead5136d757c | 100 573 | 1.1 Normative references | References may be made to: a) specific versions of publications (identified by date of publication, edition number, version number, etc.), in which case, subsequent revisions to the referenced document do not apply; or b) all versions up to and including the identified version (identified by "up to and including" befor... |
c03dccd6ab8811300bb2ead5136d757c | 100 573 | 1.2 Abbreviations | Abbreviations used in this TS are listed in GSM 01.04 [1]. |
c03dccd6ab8811300bb2ead5136d757c | 100 573 | 2 Set of channels | The radio subsystem provides a certain number of logical channels that can be separated into two categories according to GSM 04.03 [5] and GSM 03.64 [15]: 1) The traffic channels (TCH): they are intended to carry two types of user information streams: encoded speech and data. Four types of traffic channels are defined:... |
c03dccd6ab8811300bb2ead5136d757c | 100 573 | 3 Reference configuration | For the purpose of elaborating the physical layer specification, a reference configuration of the transmission chain is used as shown in annex A. This reference configuration also indicates which parts are dealt with in details in which technical specification. It shall be noted that only the transmission part is speci... |
c03dccd6ab8811300bb2ead5136d757c | 100 573 | 4 The block structures | The different block structures are described in more detail in GSM 05.03 (Channel coding). A summarized description appears in table 1, in terms of net bit rate, length and recurrence of blocks. ETSI TS 100 573 V6.1.1 (1998-07) 9 GSM 05.01 version 6.1.1 Release 1997 Table 1: Channel block structures Type of channel net... |
c03dccd6ab8811300bb2ead5136d757c | 100 573 | 5 Multiple access and timeslot structure | The access scheme is Time Division Multiple Access (TDMA) with eight basic physical channels per carrier. The carrier separation is 200 kHz. A physical channel is therefore defined as a sequence of TDMA frames, a time slot number (modulo 8) and a frequency hopping sequence. The basic radio resource is a time slot lasti... |
c03dccd6ab8811300bb2ead5136d757c | 100 573 | 5.1 Hyperframes, superframes and multiframes | A diagrammatic representation of all the time frame structures is in figure 1. The longest recurrent time period of the structure is called hyperframe and has a duration of 3 h 28 mn 53 s 760 ms (or 12 533,76 s). The TDMA frames are numbered modulo this hyperframe (TDMA frame number, or FN, from 0 to 2 715 647). This l... |
c03dccd6ab8811300bb2ead5136d757c | 100 573 | 5.2 Time slots and bursts | The time slot is a time interval of ≈ 576,9 µs (15/26 ms), that is 156,25 bit durations, and its physical content is called a burst. Four different types of bursts exist in the system. A diagram of these bursts appears in figure 1. - normal burst (NB): this burst is used to carry information on traffic and control chan... |
c03dccd6ab8811300bb2ead5136d757c | 100 573 | 5.3 Channel organization | The channel organization for the traffic channels (TCH), FACCHs and SACCH/T uses the 26-frame multiframe. It is organized as described in figure 2, where only one time slot per TDMA frame is considered. T T T T T T T T T T T T A T T T T T T T T T T T T - T t T t T t T t T t T t A T t T t T t T t T t T a (a) (b) 26 fram... |
c03dccd6ab8811300bb2ead5136d757c | 100 573 | 6 Frequency hopping capability | The frequency hopping capability is optionally used by the network operator on all or part of its network. The main advantage of this feature is to provide diversity on one transmission link (especially to increase the efficiency of coding and interleaving for slowly moving mobile stations) and also to average the qual... |
c03dccd6ab8811300bb2ead5136d757c | 100 573 | 7 Coding and interleaving | |
c03dccd6ab8811300bb2ead5136d757c | 100 573 | 7.1 General | A brief description of the coding schemes that are used for the logical channels mentioned in clause 2, plus the synchronization channel (SCH, see subclause 5.2), is made in the following tables. For all the types of channels the following operations are made in this order: - external coding (block coding); - internal ... |
c03dccd6ab8811300bb2ead5136d757c | 100 573 | 7.2 Packet Traffic and Control Channels | All packet traffic and control channels, except PRACH, use rectangular interleaving of one Radio Block over four bursts in consecutive TDMA frames. ETSI TS 100 573 V6.1.1 (1998-07) 16 GSM 05.01 version 6.1.1 Release 1997 |
c03dccd6ab8811300bb2ead5136d757c | 100 573 | 7.2.1 Channel coding for PDTCH | Four different coding schemes, CS-1 to CS-4, are defined for the Radio Blocks carrying RLC data blocks. For the Radio Blocks carrying RLC/MAC Control blocks code CS-1 is always used. The exception are messages that use the existing Access Burst [9] (e.g. Packet Channel Request). An additional coding scheme is defined f... |
c03dccd6ab8811300bb2ead5136d757c | 100 573 | 7.2.2 Channel coding for PACCH, PBCCH, PAGCH, PPCH and PNCH | The channel coding for the PACCH, PBCCH, PAGCH, PPCH and PNCH is corresponding to the coding scheme CS-1. |
c03dccd6ab8811300bb2ead5136d757c | 100 573 | 7.2.3 Channel Coding for the PRACH | Two types of packet random access burst may be transmitted on the PRACH: an 8 information bits random access burst or an 11 information bits random access burst called the extended packet random access burst. The MS shall support both random access bursts. The channel coding used for the burst carrying the 8 data bit p... |
c03dccd6ab8811300bb2ead5136d757c | 100 573 | 8 Modulation | The modulation scheme is gaussian MSK (GMSK) with BT = 0,3. As already mentioned the modulation rate is 1 625/6 kbit/s (≈ 270,83 kbit/s). This scheme is specified in detail in GSM 05.04 (Modulation and demodulation). ETSI TS 100 573 V6.1.1 (1998-07) 17 GSM 05.01 version 6.1.1 Release 1997 |
c03dccd6ab8811300bb2ead5136d757c | 100 573 | 9 Transmission and reception | The modulated stream is then transmitted on a radio frequency carrier. The frequency bands and channel arrangement are the following. i) Standard or primary GSM 900 Band, P-GSM; For Standard GSM 900 Band, the system is required to operate in the following frequency band: 890 - 915 MHz: mobile transmit, base receive 935... |
c03dccd6ab8811300bb2ead5136d757c | 100 573 | 10 Other layer 1 functions | The transmission involves other functions. These functions may necessitate the handling of specific protocols between BS and MS. Relevant topics for these cases are: 1) The power control mechanisms which adjust the output level of the mobile station (and optionally of the base station) in order to ensure that the requi... |
c03dccd6ab8811300bb2ead5136d757c | 100 573 | 11 Performance | Under typical urban fading conditions (i.e. multipath delays no greater than 5 µs), the quality threshold for full-rate speech and PDTCH/CS1 is reached at a C/I value of approximately 9 dB. The maximum sensitivity is approximately -104 dBm for base stations and GSM mobiles and -102 dBm and -100 dBm for GSM 900 small MS... |
cac5298328be863191f60ee4e84455e7 | 100 552 | 1 Scope | This Technical Specification (TS) defines limited sets of channel types, access capabilities and channel configurations at reference point Um (radio interface). |
cac5298328be863191f60ee4e84455e7 | 100 552 | 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... |
cac5298328be863191f60ee4e84455e7 | 100 552 | 1.2 Abbreviations | Abbreviations used in the present document are listed in GSM 01.04. |
cac5298328be863191f60ee4e84455e7 | 100 552 | 2 General definitions | A channel represents a specified portion of the information-carrying capacity of an interface. Channels are classified by channel types, which have common characteristics. Channel types appearing on the radio interface are specified in clauses 3 and 4. At a given time, the complete interface between a Base Station and ... |
cac5298328be863191f60ee4e84455e7 | 100 552 | 3.1 User channels | User channels are intended to carry a wide variety of user information streams. A distinguishing characteristic is that user channels do not carry signalling information for Connection Management (CM), Mobility Management (MM) or Radio Resource (RR) management. This signalling information is carried over other types of... |
cac5298328be863191f60ee4e84455e7 | 100 552 | 3.2 Bm Channel | A Bm channel is a bi-directional or uni-directional user channel able to carry: - a 13 kbit/s rate bit stream with an error structure and a transmission delay compatible with some grade of service, intended to carry voice encoded according to Technical Specifications in GSM 06-series; or - a bit stream at a rate of 14,... |
cac5298328be863191f60ee4e84455e7 | 100 552 | 3.3 Lm Channels | A Lm channel is a user channel with a carrying capability lower than a Bm channel. A Lm channel is a user channel able to carry: - some bit stream to be defined with an error structure and a transmission delay compatible with some grade of service, intended to carry voice encoded according to a method to be defined; - ... |
cac5298328be863191f60ee4e84455e7 | 100 552 | 4 Channel types and their use: Control channels | NOTE: The term "Dm channel" may be used to refer to the controls channels used by a Mobile Station at a given moment, independently of their type. (The term "Dm channel" in conjunction with the packet control channels shall be avoided.) Control channels are used to provide all active Mobile Stations with a continuous f... |
cac5298328be863191f60ee4e84455e7 | 100 552 | 4.1 Control channel types | |
cac5298328be863191f60ee4e84455e7 | 100 552 | 4.1.1 Broadcast Control Channel | A broadcast control channel is a point-to-multipoint uni-directional control channel, from the fixed sub-system to the Mobile Stations. Broadcast control channels are physically sub-divided into the broadcast control channel (BCCH) and the packet broadcast control channel (PBCCH). BCCH and PBCCH are intended to broadca... |
cac5298328be863191f60ee4e84455e7 | 100 552 | 4.1.2 Common Control Channel | A common control channel is a point-to-multipoint bi-directional control channel. Common control channels are physically sub-divided into the common control channel (CCCH) and the packet common control channel (PCCCH). CCCH and PCCCH are primarily intended to carry signalling information necessary for access management... |
cac5298328be863191f60ee4e84455e7 | 100 552 | 4.1.3 Dedicated Control Channel | A dedicated control channel (DCCH) is a point-to-point bi-directional or uni-directional control channel. DCCHs exist with a variety of bit rates. DCCHs are further classified as follows according to some technical particularities: A SDCCH (Stand-alone DCCH) is a bi-directional DCCH whose allocation is not linked to th... |
cac5298328be863191f60ee4e84455e7 | 100 552 | 5 BS access capability | The BS access capability is composed of: one BCCH; one CCCH physically related to the BCCH; {{0 to 3 additional CCCHs; and a global resource. OR: BCCH, CCCH plus 4 SDCCHs and a global resource.}} The global resource can be used to accommodate: i) n1 (Bm + FACCH + SACCH); ii) 2n2 (Lm + FACCH + SACCH); iii) 8n3 (SDCCH of... |
cac5298328be863191f60ee4e84455e7 | 100 552 | 6 Channel configurations | At a given moment, a Mobile Station accesses only a limited number of the channels appearing on its radio interface. Different compositions for the accessed channels set are identified, and specified below. Different channel configurations are: i) BCCH; ii) CCCH; iii) CCCH + BCCH; ETSI ETSI TS 100 552 V7.0.0 (1999-08) ... |
cac5298328be863191f60ee4e84455e7 | 100 552 | 6.1 Mandatory capabilities | The following access capabilities are mandatory for all MSs. - All MSs shall support the SDCCH. - If a given service is supported by an MS on a TCH/H, this MS shall support this service on a TCH/F (but not necessarily vice versa). - An MS supporting a service on TCH/F shall support the signalling only mode on TCH/F as ... |
2c9d130f4599201b7ff29ffb2e9ae502 | 100 528 | 1 Scope | A GSM PLMN may be described by a limited set of access interfaces (refer to GSM 04.02 and 02.01) and a limited set of GSM PLMN connection types to support the telecommunication services described in the GSM 02-series of specifications. This Global System for Mobile communications Technical Specification (GTS) identifie... |
2c9d130f4599201b7ff29ffb2e9ae502 | 100 528 | 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... |
2c9d130f4599201b7ff29ffb2e9ae502 | 100 528 | 3 Definitions and Abbreviations | |
2c9d130f4599201b7ff29ffb2e9ae502 | 100 528 | 3.1 Definitions | For the purposes of the present document, the following definitions apply. (DIGITAL) connection: A concatenation of (digital) transmission channels or (digital) telecommunication circuits, switching and other functional units set up to provide for the transfer of (digital) signals between two or more points in a teleco... |
2c9d130f4599201b7ff29ffb2e9ae502 | 100 528 | 3.2 Abbreviations | Abbreviations used in the present document are listed in GSM 01.04. |
2c9d130f4599201b7ff29ffb2e9ae502 | 100 528 | 4 General considerations | Low layer capabilities are defined in GSM 02.01 and characterized in GSM 02.02 for Bearer Services and GSM 02.03 for Teleservices. Apart from the short message service, all Bearer Services and Teleservices are provided using low layer capabilities in the connection mode. Network capabilities to support the short messag... |
2c9d130f4599201b7ff29ffb2e9ae502 | 100 528 | 4.2 Transparent and non-transparent lower layer capabilities | Two classes of low layer capabilities have been identified (see GSM 02.02 and GSM 02.03): ETSI ETSI TS 100 528 V7.0.1 (1999-07) 11 (GSM 03.10 version 7.0.1 Release 1998) - a transparent class which is characterized by constant throughput, constant transit delay and variable error rate; - a non-transparent class for whi... |
2c9d130f4599201b7ff29ffb2e9ae502 | 100 528 | 4.3 The GSM environment | |
2c9d130f4599201b7ff29ffb2e9ae502 | 100 528 | 4.3.1 The hand-over procedure | The GSM connection is heterogeneous and merges PCM links and radio path as a unit for the user. One of the most specific characteristics of the mobile networks is the hand-over procedure (see GSM 03.09, 04.08, 05.08, 08.08) which result in a temporary break of the TCH, and consequently in a loss of information. The GSM... |
2c9d130f4599201b7ff29ffb2e9ae502 | 100 528 | 4.3.2 DTX procedure | For the full rate speech traffic channel, DTX function goes along with other procedures such as voice activity detection, generation of comfort noise, and is described in GSM 06.31. For the non-transparent traffic channels, DTX apply according to GSM 08.20. |
2c9d130f4599201b7ff29ffb2e9ae502 | 100 528 | 5 Framework for the description of connection types | |
2c9d130f4599201b7ff29ffb2e9ae502 | 100 528 | 5.1 Introduction | A GSM PLMN provides a set of network capabilities which enable telecommunication services to be offered to a user. A GSM PLMN connection is a connection established between GSM PLMN reference points. A GSM PLMN connection type is a way of referring to and describing a GSM PLMN connection. Thus a GSM PLMN connection is ... |
2c9d130f4599201b7ff29ffb2e9ae502 | 100 528 | 5.2 Purpose of GSM PLMN connection types | The definition of a set of GSM PLMN connection types provides the necessary input to identify the network capabilities of a GSM PLMN. Other key requirements of a GSM PLMN are contained in other GSM specifications, in particular GSM 03.01, 04.01 and 04.02. In addition to describing network capabilities of a GSM PLMN, th... |
2c9d130f4599201b7ff29ffb2e9ae502 | 100 528 | 5.3 Functions associated with a GSM PLMN connection | Any GSM PLMN connection involves an association of functions to support telecommunication services as shown in figure 3. Three sets of functions are required. i) Connection means - including transmission and switching. ii) Control functions and protocols - including signalling, flow/congestion control and routing funct... |
2c9d130f4599201b7ff29ffb2e9ae502 | 100 528 | 5.4 Applications of GSM PLMN connection types | The following situations to which GSM PLMN connection types apply (see figure 4) may arise: - Between two GSM PLMN user access points (refer to GSM 02.01 and 04.02): see figure 4a. - Between a GSM PLMN user access point and a network-to-network interface: see figure 4b. - Between a GSM PLMN user access point and an int... |
2c9d130f4599201b7ff29ffb2e9ae502 | 100 528 | 5.5 GSM PLMN connection involving several networks | A GSM PLMN connection may comprise a number of tandem network connections. Figure 5 shows an example in which each end network is a GSM PLMN. The intermediate network(s) must offer the appropriate network capabilities for the service provided by the (overall) GSM PLMN connection. In (overall) GSM PLMN connections invol... |
2c9d130f4599201b7ff29ffb2e9ae502 | 100 528 | 6 GSM PLMN connection types | |
2c9d130f4599201b7ff29ffb2e9ae502 | 100 528 | 6.1 Description of GSM PLMN connection types | The characterization of GSM PLMN connection types is done by using a set of attributes. A GSM PLMN connection type attribute is a specific characteristic of a GSM PLMN connection type whose values distinguish it from another GSM PLMN connection type. Particular values are assigned to each attribute when a given GSM PLM... |
2c9d130f4599201b7ff29ffb2e9ae502 | 100 528 | 6.1.1 Rate adaptation | The RA0 rate adaptation is only used with asynchronous interfaces. Incoming asynchronous data is padded by the addition of stop elements to fit the same or nearest higher synchronous rate defined by 2 to the power n (where n≤ 6) times 600 bit/s, 14.4 kbit/s or 28.8 kbit/s. Thus both 75 and 300 bit/s user data signallin... |
2c9d130f4599201b7ff29ffb2e9ae502 | 100 528 | 6.1.2 Radio Link Protocol | The Radio Link Protocol (RLP) is a layer 2 LAPB based protocol which performs grouping of user data for the purpose of implementing error control and retransmission mechanisms in the case of non-transparent low layer capabilities. The RLP layer is in charge of the transmission of the data compression parameters to the ... |
2c9d130f4599201b7ff29ffb2e9ae502 | 100 528 | 6.1.3 Layer 2 Relay function | The Layer 2 Relay function (L2R) performs protocol conversion between the user data structure (e.g. characters or X.25 Layer 2 frames) and a structure more adapted to the radio link protocol. This function is described in the relevant GSM 07-series specifications. The L2R function includes the data compression function... |
2c9d130f4599201b7ff29ffb2e9ae502 | 100 528 | 6.1.4 Resources allocated by the GSM network | Part of the GSM connection concerns the resources allocated by the GSM network on the basis of the attribute values of the connection elements. For the speech calls, the GSM codec is allocated. For data calls, resources are provided at the IWF/MSC such as: - V.110 based rate adaptation for such channel codings as TCH/F... |
2c9d130f4599201b7ff29ffb2e9ae502 | 100 528 | 6.2 GSM PLMN connection elements | The radio interface connection element is the portion of the connection spanning from the Mobile Termination to an appropriate internal reference point within the Base Station System. The A interface connection element is the portion of the connection from the above internal reference point within the base station to a... |
2c9d130f4599201b7ff29ffb2e9ae502 | 100 528 | 6.3.1 Information transfer mode | Attribute values for connection elements: Circuit. Attribute values for overall connection type: Circuit. Association Law: Circuit. |
2c9d130f4599201b7ff29ffb2e9ae502 | 100 528 | 6.3.2 Information transfer rate (kbit/s) | Attribute values for connection elements: 3.6 or 6.0 or 12.0 or 13.0 or 14.5 or 64.0 or n × 6.0 ( 1 ≤ n ≤ 4 ) or n × 12.0 ( 1 ≤ n ≤ 6 ) or n x 14.5 ( 1 ≤ n ≤ 5 ) Attribute values for overall connection type: 3.6 or 6.0 or 12.0 or 13.0 or 14.5 or 64.0; or n × 6.0 ( 1 ≤ n ≤ 4 ) or n × 12.0 ( 1 ≤ n ≤ 6 ) or n x 14.5 ( 1 ≤... |
2c9d130f4599201b7ff29ffb2e9ae502 | 100 528 | 6.3.3 Information transfer susceptance | Attribute values for connection elements: Speech processing functions (e.g. GSM Speech Coding/A Law conversion, Discontinuous Transmission) and/or Echo suppression functions and/or Multiple satellite hops or null. Attribute values for overall connection types: Unrestricted Digital Information or Speech. Association Law... |
2c9d130f4599201b7ff29ffb2e9ae502 | 100 528 | 6.3.4 Establishment of connection | Attribute values for connection elements: Demand. Attribute values for overall connection type: Demand. ETSI ETSI TS 100 528 V7.0.1 (1999-07) 19 (GSM 03.10 version 7.0.1 Release 1998) Association Law: If any of the connection elements are Demand, then the overall connection type is Demand. |
2c9d130f4599201b7ff29ffb2e9ae502 | 100 528 | 6.3.5 Symmetry | Attribute values for connection elements: Bidirectional Symmetric. Bidirectional Asymmetric (Multislot connections for data). Attribute values for overall connection type: Bidirectional Symmetric. Bidirectional Asymmetric (Multislot connections for data). Association Law: The overall symmetry can only be generated from... |
2c9d130f4599201b7ff29ffb2e9ae502 | 100 528 | 6.3.6 Connection configuration Topology | Attribute values for connection elements: Point-to-point. Attribute values for the overall connection type: Not applicable. Association Law: Not applicable. |
2c9d130f4599201b7ff29ffb2e9ae502 | 100 528 | 6.3.7 Structure | Attribute values for connection elements: Unstructured or Service Data Unit Integrity. Attribute values for the overall connection type: As per values for connection elements. Association Law: Unspecified. |
2c9d130f4599201b7ff29ffb2e9ae502 | 100 528 | 6.3.8 Channels | |
2c9d130f4599201b7ff29ffb2e9ae502 | 100 528 | 6.3.8.1 Information channel (rate) | Attribute values for connection elements: Radio interface connection element: Full rate TCH or Full rate TCHs or Half rate TCH. A interface connection element: 64.0 kbit/s. Attribute values for the overall connection type: Not applicable. ETSI ETSI TS 100 528 V7.0.1 (1999-07) 20 (GSM 03.10 version 7.0.1 Release 1998) |
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