1、ETSI TR 101 985 1.1.2(2002-11) Technical Repor Satellite Earth Stations and Systems (SES); Broadband Satellite Multimedia; IP over Satellite 2 ETSI TR 101 985 VI .I .2 (2002-1 1) Reference RTRISES-00089 Keywords architecture, broadband, IP, multimedia, satellite ETSI 650 Route des Lucioles F-O6921 S
2、ophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 O0 Fax: +33 4 93 65 47 16 Siret No 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-prfecture de Grasse (06) No 7803/88 Important notice Individual copies of the present document can be downloaded from: http:lwmv.etsi .
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6、nications Standards Institute 2002. All rights reserved. DECTTM, PLUGTESTSTMand UMTSTMare Trade Marks of ETSI registered for the benefit of its Members. TIPHONTM and the TIPHON logo are Trade Marks currently being registered by ETSI for the benefit of its Members. 3GPPTM is a Trade Mark of ETSI regi
7、stered for the benefit of its Members and of the 3GPP Organizational Partners. ETSI 3 ETSI TR 101 985 VI . 1 . 2 (2002-1 1) Contents Intellectual Property Rights 6 Foreword . 6 1 Scope 7 2 References 7 3 Definitions and abbreviations . 9 . 9 3.1 . 10 3.2 4 Overview 12 5 Reference architectures 12 .
8、12 . 13 . 13 . . 13 Protocol architecture . . 13 5.3.1 Definitions . 13 5.3.2 SI-SAP reference model . . 14 5.3.3 Interworking models for satellite subnetworks . . 15 5.3.3.1 General . 15 5.3.3.2 Bridge interworking functions . 15 5.3.3.3 IP interworking function . . 15 5.3.3.4 Higher layer interwor
9、king functions . . 16 6 Bearer services for transport of IP structured signals . 17 . 17 6.1 . 17 6.2 General requirements . 17 6.2.1 17 6.2.1.1 17 6.2.1.2 es . IP network services 18 6.2.1.3 6.2.2 Specific requirements 18 6.2.2.1 Maximum Transmission Units (MTUs) and IP fragmentation 18 6.2.2.2 BSM
10、 frame size and segmentation . 18 6.2.2.3 MTU path discovery 18 6.2.2.4 Maximum Segment Lifetime (MSL) . . 19 6.2.2.5 Reordering of packets . . 19 6.2.2.6 Error detection . . 19 6.3 Higher layer protocols . 19 6.3.1 Transport layer protocols . 19 6.3.1.1 User Datagram Protocol (UDP) . 19 6.3.1.2 Tra
11、nsmission Control Protocol (TCP) . . 19 6.3.1.3 New transport protocols . 19 6.3.2 Application layer protocols . . 20 6.3.2.1 Hypertext Transfer Protocol (HTTP) . 20 5.1 5.2 5.2.1 5.2.2 5.3 7 7.1 7.2 7.2.1 7.2.2 7.2.3 7.2.4 7.2.5 7.3 7.3.1 Performance and availability 20 . 20 . 20 . 20 . 20 . 21 Tra
12、nsmission errors 21 . 21 . 21 21 . ETSI 4 ETSI TR 101 985 VI .I .2 (2002-1 1) 7.3.2 7.4 7.4.1 7.4.2 8 8.1 8.1.1 8.1.2 8.1.3 8.1.4 8.2 8.2.1 8.2.2 8.2.3 8.2.4 8.3 8.3.1 8.3.2 8.3.3 8.3.4 8.4 8.4.1 8.4.2 8.4.3 9 9.1 9.2 9.2.1 9.2.2 9.2.3 9.2.4 9.2.5 9.3 9.3.1 9.3.2 9.3.3 10 10.1 10.2 10.2.1 10.2.2 10.
13、2.3 10.3 10.3.1 10.3.2 10.3.3 10.3.4 .22 links 22 . .22 . .22 Quality of Service (QoS) . .23 Overview of QoS . 23 QoS definition . . 23 QoS architecture . . 23 End-to-End QoS . 23 . .24 . .24 . . .24 . . .24 . .24 25 25 . 25 26 26 26 26 . 27 . 27 BSM Quality of Service . . IP Integrated Services (In
14、tserv) . IP Differentiated Services (Diffserv) . IP transfer capabilities . Dedicated Bandwidth (DBW) transfer capability. . Statistical Bandwidth (SBW) transfer capability . Best effort (BE) transfer capability BSM QoS to IP QoS interworking Background . .26 Mapping IP QoS to BSM QoS Functional mod
15、el for BSM QoS . Routing and Addressing .28 General . 28 General . . 29 Address resolution. . 29 General . . 29 Reference model . External interfaces . 30 30 30 . 31 . 31 . 31 . . .32 Multicast and Broadcast. . .32 General . . .32 Reference models . 32 IP multicast model . . 32 Addressing functiona
16、. 33 Replication functio . 34 IP Multicast functions . 34 Static multicast gro . 35 Dynamic multicast . 35 Multicast addressing . 35 . Satellite specific address resolution protocols . Multicast routing . . 36 11 Security . 37 11.1 Introduction . .37 11.1.1 IP threats . . .37 11.1.2 BSM security pro
17、cesses . .37 11.2 Security requirements . 38 11.2.1 General performance requirements . 38 11.2.2 Compatibility requirements 38 1 1.2.3 Services requirements . 38 1 1.3 Security in the satellite independent layer 39 11.3.1 General 39 11.3.2 IPSec . 39 11.3.3 Constraints on the use of IPSec 40 ETSI 5
18、ETSI TR 101 985 VI .I .2 (2002-1 1) 11.4 Security in the satellite dependent layers . 40 . O . O . 41 41 41 41 41 42 . . . . . . . . . . . . . . . . . . . . . . . .42 . . . . . . . . . . . . . . . . . . . . . . . .42 . . . . . . . . . . . . . . . . . . . . . . . .43 . . . . . . . . . . . . . . . . .
19、 . . . . . . .43 . . . . . . . . . . . . . . . . . . . . . . . .43 . . . . . . . . . . . . . . . . . . . . . . . .43 . 43 12.4 . . . . . . . . . . . . . . . . . . . . . . . .44 12.4.1 . . . . . . . . . . . . . . . . . . . . . . . .44 12.4.2 45 Annex A: Segmentation and fragmentation 46 Annex B: Bibl
20、iography 47 History 48 12.1 Overview of PEPS . 12.2 12.2.1 Definitions . . . . . . . . . . . . . . . . . . . . . . . Layering . . . . . . . . . . . . . . . . . . . 12.2.2 Implementation distributio . 12.2.3 Implementation symmetry . 12.2.4 Split TCP connections . . using PEPs . . . . . . . . . . . .
21、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Alternatives to using PEPs Alternative transport layer protocols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Space Communications Protocol Standards
22、(SCPS). . ETSI 6 ETSI TR 101 985 VI .I .2 (2002-1 1) Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and ca
23、n be found in ETSI SR O00 314: “Intellectual Property Rights (7PRs); Essential, orpotentially Essential, IPRs notlJied to ETSI in respect ofETSI standards“, which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (5). Pursuant to the ETSI IPR Policy, no inve
24、stigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR O00 3 14 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This Technical Repo
25、rt (TR) has been produced by ETSI Technical Committee Satellite Earth Stations and Systems (SES). ETSI 7 ETSI TR 101 985 VI .I .2 (2002-1 1) 1 Scope The scope of the present document is the review of study topics with respect to the provision of IP-based services via Broadband Satellite Multimedia (
26、BSM) networks. The present document builds on the following two earlier reports: TR 101 374-1 i, “Survey on Standardization Objectives for Broadband Satellite Multimedia“. TR 101 374-2 2, “Standardization Objectives for Broadband Satellite Multimedia: The Standardization Scenario“. The present docum
27、ent also builds on the general BSM Services and Architectures defined in: TR 101 984 3, “Services and Architectures“ The present document discusses the standardization approach, relevant issues and provides a reference framework for further work that should be undertaken within ETSI with regard to t
28、he use of Broadcast Satellite Multimedia (BSM) networks to transport IP-structured traffic. The report is focussed on the following aspects off IP over satellite: BSM systems based on GeoSynchronous Orbit (GSO) satellites; integration of BSM services with IP-based services; integration of BSM satell
29、ite networks with terrestrial networks; integration of BSM broadcast and multicast services with IP-based services, including IP multicast services. The structure defined in the present document is intended to provide a framework for a series of detailed studies on specific issues which are expected
30、 to identiSl existing standards and to identiSl areas where new standards are required, in order to achieve these objectives. The objectives of BSM standardization are: to enable users to access a wide range of telecommunications services, with particular emphasis on multi-media services and high da
31、ta rates; to provide an efficient means of using network resources (particularly radio spectrum); to enable the benefits of satellite technology to be made available to a wide range of users; to facilitate the provision of a high quality of service for transporting IP traffic over BSM networks; to f
32、acilitate the provision of low cost terminals. 2 Re fe re nces For the purposes of this Technical Report (TR) the following references apply: il ETSI TR 101 374-1: “Satellite Earth Stations and Systems (SES); Broadband satellite multimedia; Part 1 : Survey on standardization objectives“. ETSI TR 101
33、 374-2: “Satellite Earth Stations and Systems (SES); Broadband satellite multimedia; Part 2: Scenario for standardization“. 21 31 ETSI TR 101 984: “Satellite Earth Stations and Systems (SES); Broadband Satellite Multimedia; Services and Architectures“. 41 ISO/IEC 3309 (1 993): “Information Technolog
34、y - Telecommunications and information exchange between systems - High level data link control (HDLC) procedures - Frame structure“. ISO/IEC 7498: “Information Technology - Open Systems Interconnection - Basic Reference Model“. 51 61 ETSI TS 123 107: “Universal Mobile Telecommunications System (UMTS
35、); QoS Concept and Architecture (Rele ase 1 9 9 9) l. ETSI 8 ETSI TR 101 985 VI .I .2 (2002-1 1) i71 i91 i81 i101 i1 11 i121 i131 i141 i151 i171 i161 i181 i221 i231 i241 i251 i271 i291 i301 i3 i1 i321 i261 i281 i331 i341 i351 i3 61 i3 81 i371 IETF RFC 791: “Internet Protocol“. IETF RFC 2460: “Intern
36、et Protocol, Version 6 (IPv6) Specification“. IETF RFC 11 12: “Host extensions for IP multicasting“. IETF RFC 2236: “Internet Group Management Protocol, Version 2“. IETF RFC 1633: “Integrated Services in the Internet Architecture: an Overview“. IETF RFC 2475: “An Architecture for Differentiated Serv
37、ice“. IETF RFC 2990: “Next steps for the IP QoS Architecture“ IETF RFC 2205: “Resource Reservation Protocol (RSVP) - Version 1 Functional Specification“. IETF RFC 2210: “The Use of RSVP with IETF Integrated Services“. IETF RFC 221 1 : “Specification of the Controlled-Load Network Element Service“. I
38、ETF RFC 2212: “Specification of Guaranteed Quality of Service“ IETF RFC 2474: “Definition of the Differentiated Services Field (DS Field) in the IPv4 and IPv6 Headers“. IETF RFC 2597: “Assured Forwarding PHB Group“ IETF RFC 2598: “An Expedited Forwarding PHB“. IETF RFC 2208: “Resource Reservation Pr
39、otocol (RSVP) - Version 1 Applicability Statement Some Guidelines on Deployment“. IETF RFC 3 135: “Performance Enhancing Proxies Intended to Mitigate Link-Related Degradations“. IETF RFC 826: “Ethernet Address Resolution Protocol: Or converting network protocol addresses to 48.bit Ethernet address f
40、or transmission on Ethernet hardware“. IETF RFC 246 1 : “Neighbour Discovery for IP Version 6 (IPv6)“. IETF RFC 2960: “Stream Control Transmission Protocol“. IETF RFC 2616: “Hypertext Transfer Protocol - HTTP/l.l“. IETF RFC 1 19 1 : “Path MTU discovery“. IETF RFC 3 168: “The Addition of Explicit Con
41、gestion Notification (ECN) to IP“. IETF RFC 2402: “IP Authentication Header“. IETF RFC 2406: “IP Encapsulating Security Payload (ESP)“. IETF RFC 2409: “The Internet Key Exchange (IKE)“. IETF RFC 3077: “A Link-Layer Tunnelling Mechanism for Unidirectional Links“. IETF RFC 2362: “Protocol Independent
42、Multicast-Sparse Mode (PIM-SM): Protocol Specification“. IETF RFC 2488: “Enhancing TCP Over Satellite Channels using Standard Mechanisms“. draft-ietf-pilc-link-design-12 (2002): “Advice for Internet Subnetwork Designers“, Phil Karn IETF Protocol Independent Multicast (pim) working group; e. IETF Mul
43、ticast Security (msec) working group; www.iet.org. IETF Multicast www.iet.org ETSI 9 ETSI TR 101 985 VI .I .2 (2002-1 1) i3 91 i401 i411 i421 i43 1 i441 i451 i461 i471 i481 i491 IETF Performance Implications of Link Characteristics (pilc) working group, mi. ietf.org. ITU-R Recommendation P.6 18: “Pr
44、opagation data and prediction methods required for the design of Earth-space telecommunication systems“. ITU-R Recommendation P. 837: “Characteristics of precipitation for propagation modelling“. ITU-R Recommendation P.83 8: “Specific attenuation model for rain for use in prediction methods“. ITU-R
45、Recommendation P. 839: “Rain height model for prediction methods“. ITU-T Recommendation Y. 1541 : “Network performance objectives for IP-Based services“. ITU-T Recommendation Y. 1540: “Internet protocol data communication service - IP packet transfer and availability performance parameters“. ITU-T D
46、raft Recommendation Y.iptc: “Traffic Control and Congestion Control in IP based Networks“. Space Communications Protocol Standards (SCPS) website; www.i.ctx.org. IS0 15893 (2000): “Space data and information transfer systems - Protocol specification for space communications - Transport protocol“. Mi
47、litary Standard (MIL-STD-2045-44000): “DoD Interface Standard: Transport Protocol“. 3 3.1 Definitions and abbreviations De fi nit ions For the purposes of the present document, the following terms and definitions apply: service attribute: specified characteristic of a telecommunication service NOTE:
48、 The value(s) assigned to one or more service attributes may be used to distinguish that telecommunication service from others. service category or service class: service offered to the users described by a set of performance parameters and their specified values, limits or ranges NOTE: The set of p
49、arameters provides a comprehensive description of the service capability. service component: single type of telecommunication service NOTE: Service components are divided into speech, audio, video and data: Speech: voice telecommunication. Audio: telecommunication of sound in general. Video: telecommunication of full motion pictures, and of stills. Data: telecommunication of information-files (text, graphics, etc). MultiMedia (MM): a combination of two or more of the above components (speech, audio, video, data), with a temporal relation
