1、 - STD.EIA TSBSO-ENGL 1798 3234b00 0630293 75b TIAIEIA TELECOMMUNICATIONS SYSTEMS BULLETIN - High Level Requirements for Common Air Interface for GEO-mobile (Super-GEO) Satellite Communications Featuring Interoperation with Terrestrial GSM TSB90 SEPTEMBER i998 TELECOMMUNICATIONS INDUSTRY ASSOCIATION
2、 Elactrank Industries Alliance STD-EIA TSBSO-ENGL 1798 = 3234b00 Ob10292 by2 NOTICE WEA Engineering Standards and Publications are designed to serve the public interest through eliminating misunderstandings between manufacturers and purchasers, facilitating interchangeability and improvement of prod
3、ucts, and assisting the purchaser in selecting and obtaining with minimum delay the proper product for his particular need. Existence of such Standards and hbiications shall not in any respect preclude any member or nonmember of TIA/EA from manufacturing or selling products not conforming to such St
4、andards and Publications, nor shaU the existence of such Standards and Publicatins preclude their voluntary use by those other than TIAIEM members, whether the standard is to be used either domestically or internationay. Standards, Publications and Bulletins are adopted by EIA in accordance with the
5、 American Nationai Standards Institute (ANSI) patent policy. By such action, TLA/EIA does not assume any liability to any patent owner, nor does it assume any obligation whatever to parties adopting the Standard, miblication, or Bulletin. Technical Bulletins are distinguished flom TIA/EA Standards o
6、r Interim Standards, in that they contain a compilation of engineering data or information useful to the technid community, and represent approaches to good engineering practices that are suggested by the formulating committee. This Bulletin is not intended to preclude or discourage other approaches
7、 that similarly represent good engineering practice, or that may be acceptable to, or have been accepted by, appropriate bodies. Parties who wish to bring other approaches to the attention of the formulating committee to be considered for inclusion in future revisions of this Bulletin are encouraged
8、 to do so. It is the intention of the formulating committee to revise and update this Bulletin from time to time as may be occasioned by changes in technology, industry practice, or government reguations, or for other appropriate reasons. (From Project No. 4026, formulate under the cognizance of the
9、 TIA TR-34.1 Subcommittee on Communications and Intemperability). Published by TELECOMMUNICATIONS INDUSTRY ASSOCIATION 1998 Standards and Technology Department 2500 Wilson Boulevard Arlington, VA 22201 PRICE Please refer to the current Catalog of EIA, JEDEC and TIA STANDARDS and ENGI“G PUBLICATIONS
10、or call Global Engineering Documents, USA and Canada (1-S-854-7179) International (303-397-7956) Ail rights reserved printed in U.S.A. STD-EIA TSBSO-ENGL 1778 U 3234b00 Ob10273 527 m Table of Contents TINEIAITSBSO Table of Contents . i Document History ii 1 . References . 1 2 . Object . 1 3 . Offere
11、d Services . 2 3.1. Teleservices 2 3.2. Bearer Services 2 3.3. Supplementary Services . 3 3.4. Security Aspects . 3 Operating Scenario 4 4.1. Orbit 4 4.2. Number of Satellites . 4 4.3. Spot Beams 4 4.4. Number of Gateways 4 4.5. Channel Model 4 Network Requirements 5 5.1 . Higher Layer (3) Protocols
12、 5 5.2. Data Link Layer Protocol . 5 5.3. User Terminal Characteristics . 5 5.4. Numbering Plan 5 5.5. Gateway Characteristics . 5 5.6. 5.7. 4 . 5 . Satellite Power Efficiency 5 Channel Bandwidth Efficiency . 6 5.8. Registration 6 5.9. Security . 6 5.1 O . Position Location 6 5.1 I . Handover Betwee
13、n Channels . 6 5.1 2 . Time Synchronization for Random Access Channels 6 5.1 3 . Frequency Synchronization . 6 5.14. Power Control . 6 5.1 5 . Voice Activation 7 5.1 6 . Optimal Routing 7 5.1 7 . Mobile to Mobile Call . 7 Performance Requirements . 7 6.1. Quality of Service (QoS) . 7 6.1 . 1. Voice
14、Service Quality 7 6.1.2. Data Service Quality 7 6 . I . 3. Facsimile Service Quality 7 Camp-on Time and Spot Beam Selection Accuracy 7 6 . 6.2. 6.3. 6.4. 6.5. 6.6. High Penetration Operation in Disadvantaged Locations 8 Frequency Control Accuracy . 8 Time Control Accuracy 8 Power Control Dynamic Ran
15、ge . 8 i STD-EIA TSBSO-ENGL 1798 323Lib00 Ob10274 4b5 1 2 TIAIEIAITSBSO 1-13-98 TSB-90 Revision O 4-22-98 TSB-90 Revision 1 Document History 3 4 I Revision I Date I Remarks I 6-25-98 8-29-98 TSB-90 2nd revision after first letter ballot TSB-90 3 revision after second letter ballot I 2 3 4 5 6 7 8 9
16、10 Il 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 STD-EIA TSBSO-ENGL 1778 D 323Lib00 Ob10275 3T1 TINEIATSBSO 1. References I GSM 02.01 Version 4.4.2 “Principles of Telecommunication Services Supported by a GSM Public Land Mobile Network” 2 GSM 02.02 Version 4.
17、2.2 “Teleservices Supported by a GSM PLMN” 3 GSM 02.03 Version 4.3.1 “Bearer Services Supported by a GSM PLMN” 4 GSM 02.04 Version 4.5.1 “European digital cellular telecommunication system (phase 2); General on Supplementary Services”, 21 June, 1993. 5 GSM 03.20 Version 4.3.1 “Security Related Netwo
18、rk Functions” 6 E.450 (03/98) Facsimile quality of service on PSTN - General aspect 2. biect The object of this document is to define the minimum requirements in terms of services, operating scenario and service attributes of a common air interface (CAI) standard for a nominally Geostationary Earth
19、Orbit (GEO) Mobile Satellite Service (MSS) enabling singlemode or multimode user terminal operation with the terrestrial GSM network. Additional features, over and above those mandated by the minimum requirements are optional and shown italicized and enclosed in brackets. The subject of standardizat
20、ion is the satellite-mobile link in both uplink and downlink directions. A GE0 mobile satellite system has several elements which differentiate it from cellular systems, low earth orbit (LEO) systems and mid-earth orbit (MEO) systems. In particular, the propagation path is significantly longer resul
21、ting in larger path losses and longer round trip delays which must be accommodated by the protocol. On the other hand, there are opportunities to simplify the protocol or to introduce new features and services of which the other systems might not be capable. Multimode operation with terrestrial GSM
22、introduces the opportunity of minimizing the complexity of the ground station and the user terminal by reusing existing GSM hardware. As such, the CAI shall be developed based on concepts, services and Technical Specifications of Phase 2 GSM and allow reuse of existing GSM network infrastructure 1,2
23、,3,4. This requirements document is limited in scope and does not address, nor is it intended to preclude other standards which might describe mobile satellite communication interoperating with GSM or other types of existing or future wireless networks. 1 STD-EIA TSBSO-ENGL 1778 9 323Lib00 ObL027b 2
24、38 M TINEIAITSBSO 1 3. OfferedServices 2 3 4 5 6 The CAI shall enable as a minimum the following GSM phase 2 telecommunication services to a handheld user terminal 2,3,4. 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 3.1. Teleser
25、vices Teleservices provide a complete capability, including terminal equipment functions, for communication between users according to established protocols. The CAI shall enable as a minimum the following GSM phase 2 teleservices: TSI 1: Speech, telephony TS12: Speech, emergency calls TS21: Short m
26、essage, mobile terminated, point-to-point TS22: Short message, mobile originated, point-to-point TS23: Short message, cell broadcast . TS61: facsimile transmission, alternate speech and facsimile group 33 TS62: Automatic Facsimile group 3 3.2. Bearer Services Bearer services provide the capability o
27、f transmission of signals between points (called user-network interfaces in ISDN). The CAI shall enable as a minimum, the following GSM phase 2 bearer services. BSZl: Asynchronous 300 bps BSZZ: Asynchronous 1200 bps BS23: Asynchronous 1200/75 bps BS24: Asynchronous 2400 bps BS25: Asynchronous 4800 b
28、ps BS26: Asynchronous 9600 bps BS31: Synchronous 1200 bps BS32: Synchronous 2400 bps BS33: Synchronous 4800 bps BS34: Synchronous 9600 bps BS41: PAD access 300 bps BS42: PAD access 1200 bps BS43: PAD access 1200/75 bps BS44: PAD access 2400 bps BS45: PAD access 4800 bps BS46: PAD access 9600 bps BS5
29、1: Packet access 2400 bps BS51: Packet access 4800 bps BS51: Packet access 9600 bps 2 TINEIATSBSO , I 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 BS61: Alternate speech/data BS81: Speech followed by data 3.3. Supplementary Servic
30、es A supplementary service modifies or supplements a basic telecommunication service. Consequently, it cannot be offered to a customer as a stand alone service. It must be offered together or in association with a basic telecommunication service. The same supplementary service may be applicable to a
31、 number of telecommunication services. The CAI shall enable as a minimum the following phase 2 GSM supplementary services in association with telecommunication services specified by GSM phase 2. The CAI shall optionally enable these supplementary services in association with telecommunications servi
32、ces which the CAI enables which are not specified by GSM phase 2 such as optimal routing, as described in section 5.16, and mobile-to-mobile calls, as described in section 5.17. call forwarding, unconditional call forwarding when busy call forwarding when congested call forwarding when no reply oper
33、ator assistance operator call trace call restriction call waiting calling party identification calling party restriction connected line ID connected line restriction 3.4. Security Aspects Security in the GEO-Mobile system shall consist of the following functions: (a) User Authentication (b) Session
34、Encryption Key Generation (c) Encryption of Trafic Data The protocols to implement the above functions shall be structurally similar to those used by GSM 5. Specifically, User Authentication will follow a challenge-response protocol with the use of secret information (Ki) known only to the User and
35、the Home Gateway Authentication Center. The protocol for Authentication of Roaming Users shall be similar to that used in GSM. The Authentication algorithm shall be cryptographically strong, and is not required to be identical to the algorithm used in GSM. During the Authentication process, the secr
36、et information Ki shall never be sent over the air in any form. 3 STD-EIA TSBSO-ENGL L778 323Lib00 Ob10278 O00 1 2 TINEIAITSBSO Similarly, the Session Encryption Key (Kc) shall be generated using Ki and the challenge. The algorithm to generate Kc is not required to be that used by GSM. Finally, traf
37、ic data shall be encrypted by an algorithm that uses Kc. The algorithm shall be cryptographically strong and is not required to be that used by GSM. When calls are established directly from Mobile-to-Mobile, trafic data may be encrypted. In this case, the establishment of a common encryption key at
38、both Mobiles shall be achieved using a secure protocol. Such a protocol will be specific to the GEO-MSS system, as GSM does not support a direct Mobile-to-Mobile calls. 10 4. ODeratina Scenario 11 12 13 14 these attributes. This section describes the minimum attributes of the communications scenario
39、 to which the subject air interface is applicable. The specified air interface must accommodate 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 4.1. Orbit The satellite repeaters used for communications shall be at nominally geostationary orbits. The communication sy
40、stem shall maintain its performance in the presence of satellite orbit perturbations in declination and inclination and with orbit drift, with both performance and orbit perturbations to be specified in the CAI. 4.2. Number of Satellites The minimum number of satellites shall be I. No maximum is spe
41、cified for the number of satellites. 4.3. Spot Beams The satellite(s) shall have multiple spot beams within its coverage area. No limits are placed on the minimum and maximum number of spot beams per satellite. The satellite power, user terminal (UT) power, and link budget shall justify the number o
42、f spot beams per satellite. The satellite may have up to several hundred spot beams, and spot beam diameters may be as low as 400 km. 4.4. Number of Gateways The system shall feature multiple gateways tolfrom terrestrial public and private networks. The minimum number of gateways shall be 1. 4.5. Ch
43、annel Model The performances of the traffic and control channels shall be specified in the channel models specified below: 4 STDnEIA TSBSO-ENGL 1778 3234b00 0b10277 T47 TIAIEiAITSB90 1 (a) AWGN 2 3 4 characterize the area. 5 (c) Rayleigh fading 6 7 (b) Rician fading with specified k value where that
44、 k value is the lowest one thought to . The CAI shall specify quantitative models for each of the above channels. 8 5. Network Requirements 9 5.1. Higher Layer (3) Protocols 10 1 I 12 The CAI shall support, to the extent feasible, the use of GSM terrestrial network components, in terms of hardware a
45、nd sohare. 13 5.2. Data Link Layer Protocol 14 15 The Data Link Layer shall accommodate the round trip propagation delay and the bit error rate of the satellite links. 16 5.3. User Terminal Characteristics 17 18 19 20 specified Quality of Service. 21 It shall be a major object of the air interface s
46、tandard to facilitate minimizing the dualmode UTS complexity, relative to a typical GSM-only UT, subject to maintaining the 22 5.4. Numbering Plan 23 24 25 26 27 28 The Common Air Interface shall support the use of a single-number, single Subscriber Identity Module (SIM) card between the GSM network
47、 and the MSS network. In addition, the CAI may also support the use of separate numbers between satellite and cellular services and support simultaneous attachment. 29 5.5. Gateway Characteristics 30 31 32 33 34 35 during a call. The gateway(s) shall provide seamless interconnection to the GSM netwo
48、rk. Here, the term, “seamless” shall mean that the call setup shall occur automatically in either the satellite or the terrestrial channel, per predetermined call routing choice. It is not required to support handover between satellite and terrestrial transmission modes 36 5.6. Satellite Power Effic
49、iency 37 38 39 Maximizing the satellite power efficiency shall be a major object of the air interface standard, subject to maintaining the specified Quality of Service. 5 STD-EIA TSBSO-ENGL 1778 323Lib00 Ob10300 599 TINEIAITSBSO 5.7. Channel Bandwidth Efficiency 1 Maximizing the channel bandwidth efficiency shall be a major object of the air interface standard, subject to maintaining the specified Quality of Service. 2 3 5.8. Registration 4 The CAI shall support UT registration for power-on, change of location, an
