1、 ETSI TS 102 674 V1.1.1 (2009-11)Technical Specification Satellite Earth Stations and Systems (SES);Broadband Satellite Multimedia (BSM);PIM-SM AdaptationETSI ETSI TS 102 674 V1.1.1 (2009-11)2Reference DTS/SES-00291 Keywords broadband, interworking, IP, satellite ETSI 650 Route des Lucioles F-06921
2、Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-Prfecture de Grasse (06) N 7803/88 Important notice Individual copies of the present document can be downloaded from: http:/www.etsi.or
3、g The present document may be made available in more than one electronic version or in print. In any case of existing or perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF). In case of dispute, the reference shall be the printing on ETS
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5、.org/tb/status/status.asp If you find errors in the present document, please send your comment to one of the following services: http:/portal.etsi.org/chaircor/ETSI_support.asp Copyright Notification No part may be reproduced except as authorized by written permission. The copyright and the foregoin
6、g restriction extend to reproduction in all media. European Telecommunications Standards Institute 2009. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTM, TIPHONTM, the TIPHON logo and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members. 3GPPTM is a Trade Mark of ETSI reg
7、istered for the benefit of its Members and of the 3GPP Organizational Partners. LTE is a Trade Mark of ETSI currently being registered for the benefit of its Members and of the 3GPP Organizational Partners. GSM and the GSM logo are Trade Marks registered and owned by the GSM Association. ETSI ETSI T
8、S 102 674 V1.1.1 (2009-11)3Contents Intellectual Property Rights 4g3Foreword . 4g3Introduction 4g31 Scope 5g32 References 5g32.1 Normative references . 6g32.2 Informative references 6g33 Definitions and abbreviations . 6g33.1 Definitions 6g33.2 Abbreviations . 7g34 PIM-SM Scenarios in BSM 8g34.1 Sou
9、rce and Rendezvous Point Scenarios 8g34.1.1 Source and RP in Core Network . 8g34.1.2 RP and Source in Premises Network 9g34.1.3 Source in Premises Network, RP in Core Network 9g34.1.4 PIM-SSM, Source in Core Network (or in CPN) . 10g34.1.5 Conclusion 10g34.2 PIM Processing Options over the BSM 11g34
10、.2.1 Scenario 1: Native PIM-over-Satellite 11g34.2.1.1 BSM Link Architecture Impacts . 12g34.2.1.1.1 Star Architecture 12g34.2.1.1.2 Hybrid Star-Mesh (Transparent) . 12g34.2.1.1.3 Hybrid Star Mesh (Regenerative Satellite) 13g34.2.1.1.4 Mesh Architecture . 13g34.2.1.2 Mesh Join Ambiguity and Assert P
11、rocess . 14g34.2.2 Scenario 2: Adapted PIM-over-Satellite (S-PIM) . 14g34.2.3 Scenario 3: PIM Snooping/Proxying 15g35 BSM PIM Adaptation (S-PIM) 15g35.1 S-PIM over BSM Functional Architecture . 15g35.2 Overall S-PIM Processing 16g35.2.1 Case1: S-PIM with normal egress-initiated set-up 16g35.2.2 Case
12、2: S-PIM with ingress-initiated set-up 17g35.3 S-PIM Message Processing and Forwarding 18g35.3.1 RP and BSR Processes (PIM Server, etc.) 19g35.3.2 Other PIM Server functions 19g35.3.3 S-PIM Prune Processing . 19g36 S-PIM Message Sequence Charts . 19g36.1 S-PIM (Case 1) . 19g36.2 S-PIM (Case 2) . 20g
13、3Annex A (informative): Configuration of PIM-SM over BSM 22g3A.1 S-PIM Layer 2 Forwarding 22g3A.2 Reduction of Hello messages . 23g3A.3 Reduction of periodic Join Messages . 23g3A.4 Reduction of Overrun of Multicast Transmission on “Prune“ failure 23g3A.5 Prune Message Impacts 24g3Annex B (informati
14、ve): Bibliography . 25g3History 26 ETSI ETSI TS 102 674 V1.1.1 (2009-11)4Intellectual 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
15、 non-members, and can be found in ETSI SR 000 314: “Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards“, which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (http:/webapp.etsi.org/
16、IPR/home.asp). Pursuant to the ETSI IPR Policy, no investigation, 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 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential
17、 to the present document. Foreword This Technical Specification (TS) has been produced by ETSI Technical Committee Satellite Earth Stations and Systems (SES). Introduction PIM-SM is the mode of the PIM protocol most widely used in existing and proposed multicast routing applications today. In the fo
18、llowing discussion “PIM-SM“ is understood to mean the messages and operation of this protocol. The way in which PIM-SM may be carried over satellite is described herein. In particular, ways in which PIM-SM can be adapted over satellite links are defined, which may lead to more efficient use of satel
19、lite resources. ETSI ETSI TS 102 674 V1.1.1 (2009-11)51 Scope The present document specifies the way in which PIM-SM multicast routing protocols may be used over satellite systems. From the many possible scenarios for PIM-SM implementation over different network configurations, three types of PIM sc
20、enarios are initially considered: Native PIM-over-Satellite; Adapted PIM-over-Satellite (S-PIM); PIM Snooping/Proxying. In particular, an adaptation of the PIM-SM standard to a non-standard BSM-internal version of PIM (i.e. S-PIM) is described. In addition, PIM-SM protocol configuration, and/or prox
21、ying needed to enable efficient operation over the satellite system and the associated interworking with terrestrial networks is described. The present document builds upon previous BSM documents referenced in annex B, and notably: TS 102 293 4: Multicast Group Management; IGMP adaptation. TS 102 29
22、4 1: BSM Multicast Functional Architecture. TS 102 461 i.2: Multicast Source Management. The PIM-SM protocol 2 (including the PIM-SSM variant 3) is the main subject of the present document since it is most widely used in preference to other multicast routing protocols today. PIM-SM over satellite is
23、 assumed to mean that PIM-SM relating to a given multicast flow is present at a BSM ingress router and is processed by the BSM network in such a way that the PIM-SM relating to the same flow is also made available to attached downstream networks at one or more BSM egress routers. It is also possible
24、 that PIM traverses the BSM system but only IGMP is then available downstream from the BSM egress ST, but this configuration is considered a minor variation as far as S-PIM is concerned and is not considered further here. The PIM over BSM scenarios are outlined in i.2 and in more detail in clause 4
25、below. As PIM-SM is considered to be a control plane protocol, the main subject addressed by the present document function is the “Multicast Control“ function as outlined in i.2, rather than multicast IP flows in the user plane. 2 References References are either specific (identified by date of publ
26、ication and/or edition number or version number) or non-specific. For a specific reference, subsequent revisions do not apply. Non-specific reference may be made only to a complete document or a part thereof and only in the following cases: - if it is accepted that it will be possible to use all fut
27、ure changes of the referenced document for the purposes of the referring document; - for informative references. Referenced documents which are not found to be publicly available in the expected location might be found at http:/docbox.etsi.org/Reference. NOTE: While any hyperlinks included in this c
28、lause were valid at the time of publication ETSI cannot guarantee their long term validity. ETSI ETSI TS 102 674 V1.1.1 (2009-11)62.1 Normative references The following referenced documents are indispensable for the application of the present document. For dated references, only the edition cited ap
29、plies. For non-specific references, the latest edition of the referenced document (including any amendments) applies. 1 ETSI TS 102 294: “Satellite Earth Stations and Systems (SES); Broadband Satellite Multimedia (BSM) services and architectures; IP interworking via satellite; Multicast functional a
30、rchitecture“. 2 IETF RFC 4601: “Protocol Independent Multicast - Sparse Mode (PIM-SM): Protocol Specification (Revised)“. 3 IETF RFC 4607: “Source-Specific Multicast for IP“. 4 ETSI TS 102 293: “Satellite Earth Stations and Systems (SES); Broadband Satellite Multimedia (BSM) services and architectur
31、es; IP Interworking over satellite; Multicast group management; IGMP adaptation“. 2.2 Informative references The following referenced documents are not essential to the use of the present document but they assist the user with regard to a particular subject area. For non-specific references, the lat
32、est version of the referenced document (including any amendments) applies. i.2 ETSI TS 102 461: “Satellite Earth Stations and Systems (SES); Broadband Satellite Multimedia (BSM); Multicast Source Management“. 3 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, t
33、he following terms and definitions apply: architecture: abstract representation of a communications system NOTE: Three complementary types of architecture are defined: square4 Functional Architecture: the discrete functional elements of the system and the associated logical interfaces. square4 Netwo
34、rk Architecture: the discrete physical (network) elements of the system and the associated physical interfaces. square4 Protocol Architecture: the protocol stacks involved in the operation of the system and the associated peering relationships. control plane: plane that has a layered structure and p
35、erforms the call control and connection control functions; it deals with the signalling necessary to set up, supervise and release calls and connections egress ST: ST at which an IP multicast flow (of user data) exits the BSM network flow (of IP packets): traffic associated with a given connection-o
36、riented, or connectionless, packet sequence having the same 5-tuple of source address, destination address, Source Port, Destination Port, and Protocol type forwarding: process of relaying a packet from source to destination through intermediate network segments and nodes NOTE: The forwarding decisi
37、on is based on information that is already available in the routing table. The decision on how to construct that routing table is the routing decision. ingress ST: ST at which an IP multicast flow (of user data) enters the BSM network ETSI ETSI TS 102 674 V1.1.1 (2009-11)7IP multicast: IP networking
38、 protocol that allows members of a specific host group to receive copies of the same IP datagram, identified by a reserved multicast address as the IP destination address IP multicast address: one of a range of IETF-defined addresses for multicast NOTE: For IPv4 this corresponds to the range from 22
39、4.0.0.0 to 239.255.255.255. IP host group: set of IP receivers for a given IP multicast group Network Control Centre (NCC): equipment at OSI Layer 2 that controls the access of terminals to a satellite network, including element management and resource management functionality user plane: plane that
40、 has a layered structure and provides user information transfer, along with associated controls (e.g. flow control, recovery from errors, etc.) 3.2 Abbreviations For the purposes of the present document, the following abbreviations apply: ASM Any-Source Multicast BMAC BSM Multicast Access Control BM
41、S BSM Management System BSM Broadband Satellite Multimedia BSM_GID BSM Group IDentity BSM_ID BSM IDentity BSR BootStrap Router CPN Customer Premises Network C-RP Candidate-Rendezvous PointEUG End User Group FDMA Frequency Division Multiple Access GID BSM Group ID address GW GateWay IETF Internet Eng
42、ineering Task Force IGMP Internet Group Message Protocol INT Internet/MAC Notification Table IntServ Integrated Services IP Internet ProtocolIPv4 Internet Protocol version 4 IPv6 Internet Protocol version 6 ISP Internet Service Provider MAC Medium Access Control MACC BSM Multicast Access Control Cli
43、ent MACD Multicast Access Control-D MACS BSM Multicast Access Control Server MAM BSM Multicast Address Management MAMC BSM Multicast Address Management Client MAMS BSM Multicast Address Management Server MAR Multicast Address Resolution MBGP Multicast Border Gateway Protocol MCM BSM Multicast Contro
44、l Management MCMC BSM Multicast Control Management Client MCMS BSM Multicast Control Management Server MER Multicast Edge Router MGID Multicast Group Identification Number MMT Multicast Mapping Table MSDP Multicast Source Discovery Protocol NCC Network Control Centre NMC Network Management Centre OB
45、P On-Board Processing OMCS On-demand multicast connection setup OUI Organizationally Unique Identifier PID Packet IDentifier ETSI ETSI TS 102 674 V1.1.1 (2009-11)8PIM Protocol Independent Multicast PIM-ASM Protocol Independent Multicast - Any-Source Multicast PIM-SM Protocol Independent Multicast -
46、Sparse Mode PIM-SSM Protocol Independent Multicast - Source Specific Multicast QID Queue IDentifier QoS Quality of Service RP Rendezvous PointRPF Reverse Path Forwarding RSM-A Regenerative Satellite Mesh - A SD Satellite Dependent SDAF Satellite Dependent Adaptation Functions SI Satellite Independen
47、t SIAF Satellite Independent Adaptation Functions SI-SAP Satellite Independent Service Access Point S-PIM BSM Adaptation of PIM SSM Source Specific Multicast ST Satellite Terminal UT User TerminalVP Virtual Port 4 PIM-SM Scenarios in BSM The scenarios described here represent the main ways in which
48、PIM-SM can be employed and configured across a BSM system, which together with its attached networks forms part of an overall IP network. The two modes of operation of PIM-SM are Any-Source Multicast (ASM) and Specific-Source Multicast (SSM). For example, Join messages in ASM specify only the Group
49、address, G, (not the source address, S) as symbolised by the couple (*, G), while Join messages in SSM specify (S, G). Join messages in ASM are forwarded up the tree towards the Rendezvous Point router (RP), while in SSM they are forwarded to the Source. ASM is often the default mode, and this mode can transition to the SSM mode during the multicast session. The relative positions of source and RP for ASM mode play a role in the message flows across the BSM as described in the following clauses. 4.1 Source and Rendezvous Point Scenarios
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