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Content for  TS 43.010  Word version:  16.0.0

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1  ScopeWord‑p. 6

This specification is only applicable for a GERAN PLMN. In the 2nd generation is this a GSM PLMN. In the 3rd generation is this a PLMN that uses a GERAN as radio access network operating either in A/Gb mode or in Iu mode.
A PLMN may be described by a limited set of access interfaces (refer to TS 24.002 and TS 22.001) and a limited set of PLMN connection types to support the telecommunication services described in the 3GPP 22-series of specifications. The present document identifies and defines these connection types in so far as they relate to the particular network capabilities for a PLMN.
The basic lower layer capabilities of a PLMN are represented by a set of PLMN connection types. The definition of a set of PLMN connection types provides the necessary input to identify network capabilities of a PLMN. In addition to describing network capabilities of a PLMN, the identification of connection types facilitates the specification of network-to-network interfaces. It may also assist in the allocation of network performance parameters.
The present document should be considered in conjunction with other 3GPP specifications with particular reference to TS 22.001, TS 22.002, TS 22.003, TS 23.002, TS 24.002 and TS 44.004.
The present document provides a bridge between the service specification in the 3GPP TS 22-series of specifications and the more detailed specifications such as the 3GPP TS 43, 44, 23, 24, 27 and 29 series. As such, it establishes a framework for the specification and understanding of the more detailed specifications. It is therefore not a specification against which detailed conformance testing can be performed. However, it shall be considered mandatory for the understanding of the more detailed specifications and used to resolve issues of conflict in these specifications.
From R99 onwards the following services are no longer required by a PLMN:
  • the dual Bearer Services "alternate speech/data" and "speech followed by data"
  • the dedicated services for PAD and Packet access
  • the single asynchronous and synchronous Bearer Services (BS 21..26, BS 31..34)
From Release 4 onwards the following services are no longer required by a PLMN:
  • the synchronous Bearer Service non-transparent (BS 30 NT).
  • the Basic Packet access
  • the Teleservice Facsimile non-transparent (TS 61/62 NT).
If a PLMN network still provides these services it has to fulfil the specification of former releases.
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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.
  • For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document.
[1]  Void
[2]  Void
[3]
TS 22.001: "Principles of telecommunications services supported by a Public Land Mobile Network (PLMN)".
[4]
TS 22.002: "Circuit Bearer Services (BS) supported by a Public Land Mobile Network (PLMN)".
[5]
TS 22.003: "Circuit Teleservices supported by a Public Land Mobile Network (PLMN)".
[6]  Void.
[7]
TS 23.002: "Network architecture".
[8]
TS 23.009: "Handover procedures".
[9]
TS 23.034: "High Speed Circuit Switched Data (HSCSD) - Stage 2 Service Description".
[10]
TS 23.040: "Technical realization of the Short Message Service (SMS) Point to Point (PP)".
[11]
TS 23.041: "Technical realization of Short Message Service Cell Broadcast (SMSCB)".
[12]
TS 43.045: "Technical realization of facsimile group 3 transparent".
[13]
TS 44.001: "Mobile Station Base Station System (MS BSS) interface General aspects and principles".
[14]
TS 24.002: "GSM-UMTS Public Land Mobile Network (PLMN) access reference configuration".
[15]
TS 44.004: "Layer 1 - General Requirements".
[16]
TS 44.005: "Data Link (DL) layer; General aspects".
[17]
TS 44.006: "Mobile Station Base Station System (MS BSS) interface Data Link (DL) layer specification".
[18]
TS 24.007: "Mobile radio interface signalling layer 3; General aspects".
[19]
TS 24.008: "Mobile radio interface layer 3 specification".
[20]
TS 24.011: "Point to Point (PP) Short Message Service (SMS) support on mobile radio interface".
[21]
TS 24.012: "Short Message Service Cell Broadcast (SMSCB) support on the mobile radio interface".
→ to date, withdrawn by 3GPP
[22]
TS 44.021: "Rate adaption on the Mobile Station Base Station System (MS BSS) interface".
[23]
TS 24.022: "Radio Link Protocol (RLP) for circuit switched bearer and teleservices"
[24]
TS 45.001: "Physical layer on the radio path (General description)".
[25]
TS 45.003: "Channel coding".
[26]
TS 45.008: "Radio subsystem link control".
[27]
TS 46.031: "Discontinuous Transmission (DTX) for full rate speech traffic channels".
[28]
TS 27.001: "General on Terminal Adaptation Functions (TAF) for Mobile Stations (MS)".
[29]
TS 27.002: "Terminal Adaptation Functions (TAF) for services using asynchronous bearer capabilities".
[30]
TS 27.003: "Terminal Adaptation Functions (TAF) for services using synchronous bearer capabilities".
[31]
TS 48.004: "Base Station System Mobile services Switching Centre (BSS MSC) interface Layer 1 specification".
[32]
TS 48.006: "Signalling transport mechanism specification for the Base Station System Mobile services Switching Centre (BSS MSC) interface".
[33]
TS 48.008: "Mobile Switching Centre Base Station System (MSC BSS) interface Layer 3 specification".
[34]
TS 48.020: "Rate adaption on the Base Station System Mobile services Switching Centre (BSS MSC) interface".
[35]  Void.
[36]
TS 29.007: "General requirements on interworking between the Public Land Mobile Network (PLMN) and the Integrated Services Digital Network (ISDN) or Public Switched Telephone Network (PSTN)".
[37]
ITU-T Recommendation I.460: "Multiplexing, rate adaption and support of existing interfaces".
[38]
ITU-T Recommendation V.110: "Support of Data Terminal Equipments (DTEs) with V-Series interfaces by an integrated services digital network".
[39]
ITU-T Recommendation V.21: "300 bits per second duplex modem standardised for use in the general switched telephone network".
[40]
ITU-T Recommendation V.22: "1 200 bits per second duplex modem standardised for use in the general switched telephone network and on point to point 2-wire leased telephone-type circuits".
[41]
ITU-T Recommendation V.22bis: "2 400 bits per second duplex modem using the frequency division technique standardised for use on the general switched telephone network and on point-to-point 2-wire leased telephone-type circuits".
[42]
ITU-T Recommendation V.24: "List of definitions for interchange circuits between Data Terminal Equipment (DTE) and Data Circuit-terminating Equipment (DCE)".
[43]
ITU-T Recommendation V.26ter: "2 400 bits per second duplex modem using the echo cancellation technique standardised for use on the general switched telephone network and on point-to-point 2-wire leased telephone-type circuits".
[44]
ITU-T Recommendation V.32: "A family of 2-wire, duplex modems operating at data signalling rates of up to 9 600 bit/s for use on the general switched telephone network and on leased telephone-type circuits".
[45]
ITU-T Recommendation V.42bis: "Data Compression for Data Circuit terminating Equipment (DCE) using Error Correction Procedures".
[46]
ITU-T Recommendation V.120: "Support by an ISDN of data terminal equipment with V-Series type interfaces with provision for statistical multiplexing".
[47]
ITU-T Recommendation X.21: "Interface between Data Terminal Equipment (DTE) and Data Circuit-terminating Equipment (DCE) for synchronous operation on public data networks".
[48]
ITU-T Recommendation X.21bis: "Use on public data networks of Data Terminal Equipment (DTE) which is designed for interfacing to synchronous V series modems".
[49]
ITU-T Recommendation X.25: "Interface between Data Terminal Equipment (DTE) and Data Circuit-terminating Equipment (DCE) for terminals operating in the packet mode and connected to public data networks by dedicated circuit".
[50]
ITU-T Recommendation X.28: "DTE/DCE interface for a start-stop mode data terminal equipment accessing the Packet Assembly/Disassembly facility (PAD) in a public data network situated in the same country".
[51]
ITU-T Recommendation X.30: "Support of X.21, X.21bis and X.20bis based Data Terminal Equipments (DTEs) by an Integrated Services Digital Network (ISDN)".
[52]
ITU-T Recommendation X.31: "Support of packet mode terminal equipment by an ISDN".
[53]
ITU-T Recommendation X.32: "Interface between Data Terminal Equipment (DTE) and Data Circuit-terminating Equipment (DCE) for terminals operating in the packet mode and accessing a packet switched public data network through a public switched telephone network or an integrated services digital network or a circuit switched public data network".
[54]
ITU-T Recommendation V.34 (1994): "A modem operating at data signalling rates of up to 28 800 bits for use on the general switched telephone network and on leased point-to-point 2-wire telephone-type circuits".
[55]
ITU-T Recommendation I.440 (1989): "ISDN user-network interface data link layer - General aspects".
[56]
ITU-T Recommendation I.450 (1989): "ISDN user-network interface layer 3 General aspects".
[57]
ISO/IEC 6429 (1992): "Information technology - Control functions for coded character sets".
[58]
TS 23.060: "General Packet Radio Service (GPRS) Service Description; Stage 2".
[59]
ITU-T Recommendation V.90: A digital modem and analogue modem pair for use on the public switched telephone network (PSTN) at data signalling rates of up to 56 000 bit/s downstream and up to 33 600 bit/s upstream.
[60]
TR 21.905: "Vocabulary for 3GPP Specifications "
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3  Definitions, symbols and abbreviationsWord‑p. 9

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 telecommunication network to support a single communication.
PLMN connection:
A connection that is established through PLMN between specified PLMN reference points.
PLMN connection type:
A description of a set of PLMN connections which have the same characteristics.
EDGE channels:
A general term referring to channels based on 8PSK modulation; i.e. TCH/F28.8, TCH/F32.0, and TCH/F43.2.
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3.2  Abbreviations

Abbreviations used in this specification are listed in TR 21.905.

4  General considerationsWord‑p. 10

Low layer capabilities are defined in TS 22.001 and characterized in TS 22.002 for Bearer Services and TS 22.003 for Teleservices. Apart from the short message service and GPRS, all Bearer Services and Teleservices are provided using low layer capabilities in the connection mode.
Network capabilities to support the short message services are defined in TS 23.040 and TS 24.011 for the point-to-point service, and in TS 23.041 and 3GPP TS 24.012 [21] for the cell broadcast service. Network capabilities to support GPRS are described in TS 23.060.
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4.1  Relationship between lower layer capabilities and radio traffic channels

The realization of low layer capabilities for the provision of telecommunication services will make use of a physical medium consisting of a traffic channel TCH (refer to TS 44.004) or a combination of several full rate traffic channels (Multislot configuration for data) except for the short message point-to-point which uses a dedicated control channel DCCH (see TS 24.011) or the cell broadcast service which uses the CBCH (see 3GPP TS 24.012 [21]). No multiplexing of data connections on one TCH is allowed.
Either a full rate or a half rate channel may be used depending on the requirements of the individual service. User data rates below or equal to 4 800 bit/s may be supported either on a full rate channel or on a half rate channel. Single slot configurations of 9.6Kbit/s and above are always supported on a full rate channel. Multislot configurations for data use combinations of 4.8 kbit/s or 9.6 kbit/s or 14.4 kbit/s full rate traffic channels only.
Technically every MS, regardless of whether it uses a half or a full rate TCH for speech transmission, should be able to use both half and full rate TCHs for data transmission and telematic services. However, particular designs of MS may only provide access to a limited set of services and therefore only use limited options.
For the alternate speech and group 3 facsimile teleservice, when a full rate traffic channel is required for the speech or data portion of the service, a full rate traffic channel will be used for the duration of the call, see TS 22.002.
Within a PLMN, the transport of user data and access interface status information (if present) will use a rate adaptation method based on ITU-T Recommendation V.110 except on TCH/F14.4 or EDGE channels for which PLMN specific rate adaption is used between the mobile station and the interworking function. For the access interface, the rate adaptation schemes used are referenced in the 3GPP TS 27-series.
On the radio path, rate adaptation leads to rates of 43.5, 32.0, 29.0, 14.5, 12.0, 6.0 and 3.6 kbit/s per TCH (see TS 44.021). However, in multislot configurations for data the 3.6 kbit/s per TCH/F rate is excluded. At the BSS to MSC interface, the rate adaptation scheme used is described in TS 48.020.
Protection of information from errors on the radio path (i.e. between MS and BSS) will be implemented by use of FEC techniques (see TS 45.003).
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4.2  Transparent and non-transparent lower layer capabilities

Two classes of low layer capabilities have been identified (see TS 22.002 and TS 22.003):
  • a transparent class which is characterized by constant throughput, constant transit delay and variable error rate;
  • a non-transparent class for which an ARQ technique is used (see TS 24.022) on the radio path and extended to an appropriate interworking function. This class is characterized by improved error rate with variable transit delay and throughput. Data compression can optionally be used in combination of non-transparent lower layer capability, to increase the data rate on the DTE/DCE interface (or the equivalent interface depending on the TE type).
The considerations described above provide the basis for the definition of a limited set of connection types to be implemented by a GERAN PLMN.
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4.3  The PLMN environmentWord‑p. 11

4.3.1  The hand-over procedure

The PLMN 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 TS 23.009, TS 24.008, TS 45.008, TS 48.008) which result in a temporary break of the TCH, and consequently in a loss of information.
The PLMN makes it possible to use one TCH slot for signalling (frame stealing for FACCH) in one TDMA frame resulting in a loss of information.
For the transparent data calls, this will result in a period of highly errored stream. For the non-transparent services, the use of the ARQ procedure (TS 24.022) will overcome this problem.
After a hand-over, in case of loss of synchronization, the process to recover synchronization, as described in TS 29.007 and TS 44.021 should apply. If data compression is used, V.42bis procedure should apply.
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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 TS 46.031.
For the non-transparent traffic channels, DTX apply according to TS 48.020.

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