1、 ETSI TS 102 856-2 V1.1.1 (2011-07)Technical Specification Satellite Earth Stations and Systems (SES);Broadband Satellite Multimedia (BSM);Multi-Protocol Label Switching (MPLS)interworking over satellite;Part 2: Negotiation and management of MPLS labels andMPLS signalling with attached networksETSI
2、ETSI TS 102 856-2 V1.1.1 (2011-07)2Reference DTS/SES-00307 Keywords broadband, IMS, internet, interworking, IP, MPLS, multimedia, QoS, satellite ETSI 650 Route des Lucioles F-06921 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 As
3、sociation 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.org The present document may be made available in more than one electronic version or in print. In any case of existing o
4、r 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 ETSI printers of the PDF version kept on a specific network drive within ETSI Secretariat. Users of the present document s
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6、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 foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2011. All rights res
7、erved. DECTTM, PLUGTESTSTM, UMTSTMand the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members. 3GPPTM and LTE are Trade Marks of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. GSM and the GSM logo are Trade Marks registered and owned b
8、y the GSM Association. ETSI ETSI TS 102 856-2 V1.1.1 (2011-07)3Contents Intellectual Property Rights 4g3Foreword . 4g3Introduction 4g31 Scope 5g32 References 5g32.1 Normative references . 5g32.2 Informative references 6g33 Definitions and abbreviations . 7g33.1 Definitions 7g33.2 Abbreviations . 8g3
9、4 General background on MPLS and BSM . 9g34.1 MPLS labels allocation and distribution 9g34.2 General QoS issues in MPLS . 10g34.3 MPLS/BSM architectural issues and relation to TS 102 856-1 11g34.4 Relevant BSM issues and organization of the present document . 12g34.5 Relevance of the present documen
10、t for Scenarios B and C 12g35 U-plane MPLS data transfer in BSM Systems . 13g35.1 SI-SAP as external interface . 14g35.2 SD transport of MPLS packets . 15g36 C-plane procedures for MPLS in BSM Systems 16g36.1 Forwarding policies for MPLS signaling . 16g36.1.1 MPLS-signalling QID: IP_queue_label and
11、QIDSPEC parameters . 16g36.1.2 MPLS-signalling QID: destination BSM_ID parameter . 16g36.1.3 MPLS-signalling QID: lease time parameter 16g36.2 QoS and resource allocation . 17g36.2.1 DiffServ 17g36.2.2 IntServ 18g36.3 MPLS interfaces at SI-SAP 19g36.3.1 MPLS outgoing interface at the ingress ST 21g3
12、6.3.2 MPLS incoming interface at the egress ST . 22g37 M-plane procedures in support of MPLS . 22g3Annex A (informative): Suggested update of SI-SAP U-plane primitives . 24g3A.1 Use of the BSM_ID in the SI-SAP U-plane primitives 25g3History 26g3ETSI ETSI TS 102 856-2 V1.1.1 (2011-07)4Intellectual Pr
13、operty 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 can be found in ETSI SR 000 314: “Intellectual Property Rights (IPRs);
14、 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:/ipr.etsi.org). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carri
15、ed 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 to the present document. Foreword This Technical Specification (TS) has been produced by ETSI Technical
16、 Committee Satellite Earth Stations and Systems (SES). The present document is part 2 of a multi-part deliverable covering the issues related to the use of MPLS (Multi-Protocol Label Switching) in “Satellite Earth Stations and Systems (SES); Broadband Satellite Multimedia (BSM)“, as identified below
17、: Part 1: “MPLS-based Functional Architecture“; Part 2: “Negotiation and Management of MPLS labels and MPLS signalling with attached networks“. Introduction Multi-protocol Label Switching (MPLS) is employed today as a solution for delivering quality of service (QoS) on IP-based terrestrial networks,
18、 and for traffic engineering e.g. MPLS-TE. The present document defines the way in which this technology may be implemented in next generation satellite networks based on the BSM model. For general background on MPLS the reader is referred to TS 102 856-1 13. ETSI ETSI TS 102 856-2 V1.1.1 (2011-07)5
19、1 Scope The BSM/MPLS technical specifications extend and complement the existing BSM functional architecture (1 to 3) and the SI-SAP interface 4 to enable transport of MPLS signalling and data flows over a BSM network, in a way such that MPLS networks connected by different STs can communicate as if
20、 they were connected by standard terrestrial LSRs (label switched routers). In this general scope, TS 102 856-1 13 clarifies the main architectural issues, including operational scenarios and protocol stacks, and discusses how BSM-compliant STs can be designed and configured to address MPLS-specific
21、 tasks. The present document, clarifies the signalling issues related to the use of MPLS in BSM systems, with a particular focus on the case when the LSR is completely integrated in an ST; in this case the ST still acts in a BSM-compliant manner over the satellite, but it also behaves as a classical
22、 LSR on its terrestrial interface to external networks. The setup of multicast MPLS paths is considered out of scope. 2 References References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references, only the cited versi
23、on applies. For non-specific references, the latest version of the reference document (including any amendments) applies. 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
24、in this clause were valid at the time of publication, ETSI cannot guarantee their long term validity. 2.1 Normative references The following referenced documents are necessary for the application of the present document. 1 ETSI TS 102 292: “Satellite Earth Stations and Systems (SES); Broadband Satel
25、lite Multimedia (BSM) services and architectures; Functional architecture for IP interworking with BSM networks“. 2 ETSI TR 101 984: “Satellite Earth Stations and Systems (SES); Broadband Satellite Multimedia (BSM); Services and architectures“. 3 ETSI TR 101 985: “Satellite Earth Stations and System
26、s (SES); Broadband Satellite Multimedia; IP over Satellite“. 4 ETSI TS 102 357 (V1.1.1): “Satellite Earth Stations and Systems (SES); Broadband Satellite Multimedia (BSM); Common Air interface specification; Satellite Independent Service Access Point SI-SAP“. 5 ETSI TS 102 462: “Satellite Earth Stat
27、ions and Systems (SES); Broadband Satellite Multimedia (BSM); QoS Functional Architecture“. 6 ETSI TS 102 463: “Satellite Earth Stations and Systems (SES); Broadband Satellite Multimedia (BSM); Interworking with IntServ QoS“. 7 ETSI TS 102 464: “Satellite Earth Stations and Systems (SES); Broadband
28、Satellite Multimedia (BSM); Interworking with DiffServ Qos“. 8 ETSI TS 102 672: “Satellite Earth Stations and Systems (SES); Broadband Satellite Multimedia (BSM); Management Functional Architecture“. ETSI ETSI TS 102 856-2 V1.1.1 (2011-07)69 ETSI TS 102 673: “Satellite Earth Stations and Systems (SE
29、S); Broadband Satellite Multimedia (BSM); Performance Parameters“. 10 ETSI TS 102 675-1: “Satellite Earth Stations and Systems (SES); Broadband Satellite Multimedia (BSM); Part 1: Performance Management at the SI-SAP“. 11 ETSI TS 102 675-2: “Satellite Earth Stations and Systems (SES); Broadband Sate
30、llite Multimedia (BSM); Part 2: Performance Management Information Base“. 12 IEEE EtherType Field Public Assignment Announcement. NOTE: Available at http:/standards.ieee.org/regauth/ethertype/eth.txt. 13 ETSI TS 102 856-1: “Satellite Earth Stations and Systems (SES); Broadband Satellite Multimedia (
31、BSM); Multi-Protocol Label Switching (MPLS) interworking over satellite Part 1: MPLS-based Functional Architecture“. 2.2 Informative references The following referenced documents are not necessary for the application of the present document but they assist the user with regard to a particular subjec
32、t area. i.1 ETSI TS 102 602: “Satellite Earth Stations and Systems (SES); Broadband Satellite Multimedia; Connection Control Protocol (C2P) for DVB-RCS; Specifications“. i.2 IETF RFC 2210: “Use of RSVP with IETF Integrated Services“. i.3 IETF RFC 2863: “The Interfaces Group MIB“. i.4 IETF RFC 3031:
33、“Multiprotocol Label Switching Architecture“. i.5 IETF RFC 3035: “MPLS using LDP and ATM VC Switching“. i.6 IETF RFC 3209: “RSVP-TE: Extensions to RSVP for LSP Tunnels“. i.7 IETF RFC 3270: “MPLS Support of Differentiated Services“. i.8 IETF RFC 3468: “The Multiprotocol Label Switching (MPLS) Working
34、 Group decision on MPLS signalling protocols“. i.9 IETF RFC 3564: “Requirements for Support of Differentiated Services-aware MPLS Traffic Engineering“. i.10 IETF RFC 363: “Traffic Engineering (TE) Extensions to OSPF Version 2“. i.11 IETF RFC 3813: “Multiprotocol Label Switching (MPLS) Label Switchin
35、g Router (LSR) Management Information Base (MIB)“. i.12 IETF RFC 3814: “Multiprotocol Label Switching (MPLS) Forwarding Equivalence Class To Next Hop Label Forwarding Entry (FEC-To-NHLFE) Management Information Base (MIB)“. i.13 IETF RFC 4090: “Fast Reroute Extensions to RSVP-TE for LSP Tunnels“. i.
36、14 IETF RFC 4204: “Link Management Protocol (LMP)“. i.15 IETF RFC 4875: “Extensions to Resource Reservation Protocol - Traffic Engineering (RSVP-TE) for Point-to-Multipoint TE Label Switched Paths (LSPs)“. i.16 IETF RFC 5036: “LDP Specification“. i.17 IETF RFC 5342: “IANA Considerations and IETF Pro
37、tocol Usage for IEEE 802 Parameters“. i.18 IETF RFC 5462: “MPLS Label Stack Entry - EXP Field renamed to Traffic Class Field“. i.19 Internet Draft draft-ietf-mpls-ldp-p2mp-13: “Label Distribution Protocol Extensions for Point-to-Multipoint and Multipoint-to-Multipoint Label Switched Paths“, April 20
38、11. ETSI ETSI TS 102 856-2 V1.1.1 (2011-07)73 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the following terms and definitions apply: architecture: abstract representation of a communications system NOTE: Three complementary types of architecture are define
39、d: square4 Functional Architecture: the discrete functional elements of the system and the associated logical interfaces. square4 Network Architecture: the discrete physical (network) elements of the system and the associated physical interfaces. square4 Protocol Architecture: the protocol stacks in
40、volved in the operation of the system and the associated peering relationships. BSM Network: BSM subnetwork together with the BSM interworking and adaptation functions that are required to provide IP interfaces (i.e. layer 3 and below) to attached networks BSM Subnetwork: all the BSM network element
41、s below the Satellite Independent Service Access Point (SI-SAP) BSM System (BSMS): system comprising a BSM Network together with a Network Management Centre (NMC) and Network Control Centre (NCC) NOTE: The BSM System also includes any additional elements that are required to provide the network serv
42、ices to the subscribers and their users. control plane: the plane that provides the control functions NOTE: The control plane has a layered structure and performs the call control and connection control functions; it deals with the signalling necessary to set up, supervise and release calls and conn
43、ections. flow (of IP packets): traffic associated with a given connection-oriented, 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
44、through intermediate network segments and nodes NOTE: The forwarding decision 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. management plane: the plane that provides the management functions NOTE:
45、The management plane provides two types of functions, namely Layer Management and plane management functions: square4 Plane management functions are functions related to a system as a whole and provides co-ordination between all the planes. Plane management has no layered structure. square4 Layer ma
46、nagement functions are functions relating to resources and parameters residing in its protocol entities. Layer management handles the operation and maintenance (OAM) of information flows specific to the layer concerned. network control centre: equipment at OSI Layer 2 that controls the access of ter
47、minals to a satellite network, including element management and resource management functionality user plane: plane that has a layered structure and provides user information transfer, along with associated controls (e.g. flow control, recovery from errors, etc.) ETSI ETSI TS 102 856-2 V1.1.1 (2011-
48、07)83.2 Abbreviations For the purposes of the present document, the following abbreviations apply: AF Assured Forwarding ATM Asynchronous Transfer Mode BA Behaviour Aggregate BE Best Effort BNMS BSM Network Management System BSM Broadband Satellite Multimedia BSMS BSM System CL Controlled LoadCS Cla
49、ss Selector DiffServ Differentiated services (IETF) DSCP DiffServ Code Point EF Expedited Forwarding E-LSP Explicitly TC-encoded-PSC LSP FEC Forwarding Equivalence Class FRR Fast Re-route FTN FEC-To-NHLFEGS Guaranteed Service IETF Internet Engineering Task Force ILM Incoming Label Map IntServ Integrated Services (IETF) IP Internet Protocol ISO International Organization for Standardization L2 Layer 2 (of the ISO/OSI protocol stack) L3 Layer 3LDP Label Distribution Protocol LER Label Edge Router L-LSP L
