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ITU-T J 115-1999 Interaction Channel Using the Global System for Mobile Communications - Series J Transmission of Television Sound Programme and Other Multimedia Signals - Interacton.pdf

1、 48b2591 Obb8590 890 INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU J.115 (09/99) SERIES J: TRANSMISSION OF TELEVISION, SOUND PROGRAMME AND OTHER MULTIMEDIA SIGNALS Interactive systems for digital television distribution Interaction channel using the glob

2、al system for mobile communications ITU-T Recommendation J. 1 15 (Previously CCITT Recommendation) INTERNATIONAL TELECOMMU N CATION U NION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU J.115 (09/99) SERIES J: TRANSMISSION OF TELEVISION, SOUND PROGRAMME AND OTHER MULTIMEDIA SIGNALS Interactiv

3、e systems for digital television distribution Interaction channel using the global system for mobile communications ITU-T Recommendation J.115 (Previously CCITT Recommendation) ITU-T J-SERIES RECOMMENDATIONS TRANSMISSION OF TELEVISION, SOUND PROGRAMME AND OTHER MULTIMEDIA SIGNALS General Recommendat

4、ions General specifications for analogue sound-programme transmission Performance characteristics of analogue sound-programme circuits Equipment and lines used for analogue sound-programme circuits Digital encoders for analogue sound-programme signals Digital transmission of sound-programme signals

5、Circuits for analogue television transmission Analogue television transmission over metallic lines and interconnection with radio-relay links Digital transmission of television signais Ancillary digital services for television transmission Operational requirements and methods for television transmis

6、sion Interactive systems for digital television distribution Transport of WEG-2 signals on packetised networks Measurement of the quality of service Digital television distribution through local subscriber networks J. 1-J.9 J. 1 0-J. 19 J.20-J.29 J.30-J.39 J.40-J.49 J.50-J.59 J.60-J.69 J.70-J.79 J.8

7、0-J.89 J.90-J.99 J. 100-J. 109 J. 11O5.129 J. 130-5.139 J. 140-5.149 J.150-J.159 For further details, please refer to ITU-T List of Recommendations. b2591 Obb593 5TT = ITU-T RECOMMENDATION 5.115 INTERACTION CHANNEL USING THE GLOBAL SYSTEM FOR MOBILE COMMUNICATIONS Summary This Recommendation is the

8、baseline specification for the provision of an interaction channel using the Global System for Mobile Communications (GSM) in conjunction with a digital broadcasting delivery medium. It is suitable for use with any broadcast transmission medium, such as cable, satellite, terrestrial, etc., thus ensu

9、ring the maximum degree of interoperability and economies of scale. Source ITU-T Recommendation J. 1 15 was prepared by ITU-T Study Group 9 (1 997-2000) and was approved under the WTSC Resolution No. 1 procedure on the 16 September 1999. Recommendation 5.115 (09/99) i FOREWORD ITU (International Tel

10、ecommunication Union) is the United Nations Specialized Agency in the field of telecommuni- cations. The ITU Teiecommunication Standardization Sector (ITU-T) is a permanent organ of the IT. The ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on

11、 them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Conference (WTSC), which meets every four years, establishes the topics for study by the ITU-T Study Groups which, in their turn, produce Recommendations on these topics. The appro

12、val of Recommendations by the Members of the ITU-T is covered by the procedure laid down in WTSC Resolution No. 1. In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with IS0 and IEC. NOTE In this Recommendation, th

13、e expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. INTELLECTUAL PROPERTY RIGHTS The IT draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a clai

14、med Intellectual Property Right. The ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation development process. As of the all users of this Recommendation are therefore

15、 encouraged to investigate the possibility of applying the most recent edition of the Recommendations and other references listed below. A list of the currently valid ITU-T Recommendations is regularly published. ITU-T Recommendation J. 1 1 O (1997), Basic principles for a worldwide common family of

16、 systems for the provision of interactive television services. ITU-T Recommendation J. 1 1 1 (1 998), Network independent protocols for interactive systems. EN 50201: 1998, Interfaces for DVB-IRD. ETSI ETS 300 505, Digital cellular telecommunications system (Phase 2); Mobile Station (MS) features (G

17、SM 02.07 version 4.8.2). ETSI ETS 300 5 56, European digital cellular telecommunications system (Phase 2); Mobile radio interface signalling layer 3; General aspects (GSM 04.07). ETSI ETS 300 557, Digital cellular telecommunications system (Phase 2); Mobile radio interface; Layer 3 specification (GS

18、M 04.08 version 4.22.0). ETSI ETS 300 600, European digital cellular telecommunications system (Phase 2); Signalling requirements on interworking between the Integrated Services Digital Network QSDN) or Public Switched Telephone Network (PSnV) and the Public Land Mobile Network (PLIWV) (GSM 09.03).

19、ETSI ETS 300 604, Digital cellular telecommunications system (Phase 2); General requirements on interworking between the Public Land Mobile Network (PLIWV) and the Integrated Services Digital Network QSDN) or Public Switched Telephone Network (PSnV) (GSM 09.07). ETSI ETS 300 582, Digital cellular te

20、lecommunications system (Phase 2); General on Terminal Adaptation Functions (TAF) for Mobile Stations (MS) (GSM 07.01). ETSI ETS 300 5 83, European digital cellular telecommunications system (Phase 2); Terminal Adaptation Functions PAF) for services using asynchronous bearer capabilities (GSM 07.02)

21、. Recommendation 5.115 (09/99) 1 ETSI ETS 300 500, Digital cellular telecommunications system (Phase 2); Principles of telecommunication services supported by a GSMPublic Lund Mobile Network (PLMN) (GSM 02.01). ETSI ETS 300 501, European digital cellular telecommunications system (Phase 2); Bearer S

22、ervices (BS) supported by a GSMPublic Land Mobile Network (PLm) (GSM 02.02). ETSI ETS 300 522, Digital cellular telecommunications system (Phase 2); Network architecture (GSM 03.02). ETSI ETS 300 528, European digital cellular telecommunications system (Phase 2); GSMPubIic Land Mobile Network (PLW)

23、connection types (GSM 03.10). ETSI ETS 300 550, European digital cellular telecommunications system (Phase 2); Mobile Station - Base Station System (MS - BSS) interface; General aspects andprinciples (GSM 04.01). ETSI ETS 300 55 1, European digital cellular telecommunications system (Phase 2); GSMPu

24、blic Land Mobile Network (PLMN) access reference configuration (GSM 04.02). ETSI ETS 300 552, European digital cellular telecommunications system (Phase 2); Mobile Station - Base Station System (MS - BSS) interface; Channel structures and access capabilities (GSM 04.03). ETSI ETS 300 554, European d

25、igital cellular telecommunications system (Phase 2); Data Link (DL) layer; General aspects (GSM 04.05). ETSI ETS 300 555, European digital cellular telecommunications system (Phase 2); Mobile Station - Base Station System (MS - BSS) interface; Data Link PL) layer specijcation (GSM 04.06). ETSI ETS 3

26、00 562, European digital cellular telecommunications system (Phase 2); Rate adaption on the Mobile Station - Base Station System (MS - BSS) interface (GSM 04.2 1). ETSI ETS 300 586, European digital cellular telecommunications system (Phase 2); Use of the Vseries Data Terminal Equipment -Data Circui

27、t terminating Equipment (DTE - DCE) interface at the Mobile Station (M) for Mobile Termination (m) con$guration (GSM 07.06). Abbreviations This Recommendation uses the following abbreviations: BC BIM BSC BTS DCE DTE DVB EN ETS GMSK GSM IC IIM INA ISDN MS MSC MT MU os1 PSTN 2 Broadcast Charinel Broad

28、cast Interface Module Base Station Controller Base Transceiver Station Data Circuit-terminating Equipment Data Terminal Equipment Digital Video Broadcasting European Norm European Telecommunication Standard Gaussian Minimum Shift Keying Global System for Mobile Communications Interactive Channel Int

29、eractive Interface Module Interactive Network Adapter Integrated Switched Digital Network Mobile Station Mobile Switching Centre Mobile Termination Network Interface Unit Open Systems Interconnection Public Switched Telephone Network Recommendation 5.115 (09199) RA Radio Adaptation SMS Short Message

30、 Service STB Set-Top Box STU Set-Top Unit TDMA Time Division Multiple Access TE Terminating Equipment 4 Reference model A reference model for the system architecture of narrow-band interaction channels in a broadband scenario (asymmetric interactive services) is presented in this clause. i 4.1 Proto

31、col stack model Within the DVB requirements for asymmetric interactive services supporting broadcast to the home with narrow-band return channel, a simple communications model has been used to identi the necessity and importance of each requirement consisting of the following layers (the layers do n

32、ot coincide exactly with the OS1 layers): Physical layer: Where all the physical (electrical) transmission parameters are defined. Transport layer: Defines all the relevant data structures and communication protocols like data containers, etc. Application layer: Is the interactive application softwa

33、re and runtime environment (e.g. home shopping application, script interpreter, etc.). This Recommendation addresses the lower two layers (the physical and transport layers), leaving the application layer open to competitive market forces. A simplified model of the OS1 layers was adopted to facilita

34、te the production of specifications for these nodes. Figure 1 points out the lower layers of the simplified model and identifies some of the key parameters. Following the user requirements for interactive services, no attempt will be made to consider higher layers in this Recommendation: Proprietary

35、 layers I Network-independent protocols I I Higher medium layers Access mechanism Network-dependent protocols Packet structure Modulation Channel coding Frequency range Filtering Equalization Power I I T0907930-99/d01 Figure UJ.115 - Layer structure for generic system reference model This Recommenda

36、tion addresses the GSM specific aspects only. The network-independent protocols are specified separately in Recommendation J. 1 1 1 2. Recommendation 5.115 (09/99) 3 lib257L ObbBb00 5bT - I- - - - - - - -1 Layer 3 Specification“ (GSM 04.08) 6. If the service provider is not reachable for any reason

37、(line is busy, coverage issues, channel availability, etc.), the upper layers will be responsible for repeating the calling attempts and/or informing the user. 5.3 Forced disconnection Disconnection for emergency calls can be implemented by the upper layer protocols using the signalling channel. Rec

38、ommendation 5.115 (09/99) 5 Appendix I Basic Characteristics of GSM I. 1 GSM, general The GSM (Global System for Mobile Communications) standards can be operated in several frequency bands, e.g. 900 MHz, 1800 MHz, and has reached worldwide success. The GSM network is realized as a network of contigu

39、ous cells, providing a complete coverage of the service area. Each cell has a Base Transceiver Station (BTS) operating on a dedicated set of radio channels. BTSs are logically grouped together and controlled by a Base Station Controller. A group of BSCs is served by a Mobile services Switching Centr

40、e (MSC). The GSM system uses TDMA and GMSK modulation on 200 kHz wide carriers which results in a gross data rate of 270 kbit/s. This capacity is split in 8 full- or 16 half-rate channels and some signalling channels. GSM is a digital cellular radio network containing standardized services as speech

41、, fax and data. Some of the GSM data services that can be used in the DVB context is presented below. A GSM network does not have to offer all the specified data services, so described data services may not be implemented in all GSM networks. GSM teleservices offer an end-to-end communication capabi

42、lity, including terminal equipment functions. GSM bearer services operate at OS1 layers 1 to 3 between access points, serving as a base for teleservices (not the teleservice SMS) or user-specific communication protocols. GSM offers secure data transfer within the GSM network, due to subscriber authe

43、ntication and data enciphering. GSM specifies a teleservice called SMS (Short Message Service). The short message MTPP (Mobile Terminated/ Point- to-Point) and short message MOFP (Mobile OriginatedRoint-tePoint) services can be used to transmit text messages with a maximum length of 160 characters (

44、SMS messages longer than 160 characters are specified and is achieved by a concatenation procedure) between a mobile station and an SMS Service Centre (SMS-SC). An SMS-SC operates as a store-and-forward relay for messages and can be accessed via different sources. GSM specifies severa! bearer servic

45、es. Bearer services are circuit switched and data rates up to 9.6 kbit/s are at present supported. A non-transparent bearer service uses ARQ (automatic retransmission request) and has, therefore an error rate of effectively zero, but a variable delay. A GSM Network can interwork with other GSM Netwo

46、rks, PSTN (Public Switched Telephone Network), ISDN (Integrated Services Digital Network) and PSPDN (Packet Switched Public Data Network). 1.2 Future GSM data services The GSM phase 1 and phase 2 data services, as those presented in 1.1, are introduced in most networks. GSM is still evolving, where

47、ETSI is standardizing GSM phase 2+ services. One of the phase 2+ services are packet data in GSM with speeds up to around 100 kbit/s. The GPRS (General Packet Radio Service) standardization is in its final stages. A High-speed Circuit-Switched Data (HSCSD) service formed by combining several traffic

48、 channels has also been standardized. 6 Recommendation 5.115 (09/99) P q8b257L Obb8b03 277 m Circuit mode 3.1 kHz Audio TransDarent and Non-tranmarent Apendix II Circuit mode 3.1 kHz Audio Interworking types When two dissimilar networks are required to interwork in order to support a communication b

49、etween two subscribers, one on each network, a number of Interworking Functions (MSC/IWFs) are required to support the communication. Service interworking is required when the Teleservices at the calling and called terminals are different. No service interworking has been identified as a requirement of GSM system for the purpose of this Recommendation. However, network interworking is required whenever a GSM network and a non-GSM network together are involved to provide an end-to-end connection. The concept of Bearer Services was deve

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