1、 ETSI TS 102 463 V1.2.1 (2015-08) Satellite Earth Stations and Systems (SES); Broadband Satellite Multimedia (BSM); Interworking with IntServ QoS TECHNICAL SPECIFICATION ETSI ETSI TS 102 463 V1.2.1 (2015-08)2 Reference RTS/SES-00360 Keywords broadband, interworking, IP, multimedia, QoS, satellite ET
2、SI 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 Association but non lucratif enregistre la Sous-Prfecture de Grasse (06) N 7803/88 Important notice The present document can be downloaded from: http
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6、spx Copyright Notification No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm except as authorized by written permission of ETSI. The content of the PDF version shall not be modified without the written authorization of E
7、TSI. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2015. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTMand the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members. 3GPPTM and LTE are Trade Ma
8、rks 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 by the GSM Association. ETSI ETSI TS 102 463 V1.2.1 (2015-08)3 Contents Intellectual Property Rights 5g3Foreword 5g3Modal verbs terminology . 5g3In
9、troduction 5g31 Scope 6g32 References 6g32.1 Normative references . 6g32.2 Informative references . 7g33 Definitions and abbreviations 7g33.1 Definitions . 7g33.2 Abbreviations . 9g34 Overview 9g35 BSM IntServ Functional Architecture . 10g35.0 General . 10g35.1 Outline of BSM IntServ Operation 10g35
10、.2 BSM IntServ Architecture . 11g35.2.1 ST IntServ Functions 11g35.2.2 Overall BSM IntServ Functions . 12g35.2.2.0 Main scenarios 12g35.2.2.1 Distributed RSVP architecture 13g35.2.2.2 Centralized RSVP architecture . 13g35.2.3 BSM Ingress ST QoS Functional Definition 14g35.2.3.0 Ingress architecture
11、. 14g35.2.3.1 User Plane . 15g35.2.3.2 Control Plane (CP) 15g35.2.3.2.0 General 15g35.2.3.2.1 RSVPA Functions . 15g35.2.3.2.2 STQRM Functions 15g35.2.4 BSM Egress ST QoS Functional Definition . 16g36 QID Control and Management . 16g36.0 General . 16g36.1 Description . 16g36.2 Relationship of QID man
12、agement to SD resource reservation 16g36.3 QID Control Interfaces 17g36.3.0 General . 17g36.3.1 RSVPA and STQRM Interaction . 17g36.4 QID Control Primitives 18g37 IntServ QoS Mapping across the SI-SAP 18g37.1 Approaches to flow queuing at IP and SD layers . 18g37.2 Queue Management Approaches . 20g3
13、7.2.1 Guaranteed Services . 20g37.2.2 Controlled Load (CL) services . 20g37.2.3 Best Effort Services 21g3Annex A (normative): QID Definition and Control 22g3A.0 General . 22g3A.1 Definition of QIDs . 22g3A.1.0 General . 22g3A.1.1 Queue IDentifier (QID) 22g3A.1.2 QID QoS Invocation and Definition (QI
14、DSPEC) 22g3A.2 QID mapping to IP and SD Queues . 23g3ETSI ETSI TS 102 463 V1.2.1 (2015-08)4 A.2.0 General . 23g3A.2.1 IP-to-QID mapping 23g3A.2.2 QID-to-SD mapping . 24g3A.3 QoS Control Plane Primitives 25g3A.3.0 General . 25g3A.3.1 QID Creation 26g3A.3.2 QID Modification. 26g3A.3.3 QID Release . 28
15、g3A.3.4 QID Status Update . 29g3History 31g3ETSI ETSI TS 102 463 V1.2.1 (2015-08)5 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 m
16、embers and 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:/ipr.et
17、si.org). 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 to th
18、e present document. Foreword This Technical Specification (TS) has been produced by ETSI Technical Committee Satellite Earth Stations and Systems (SES). Modal verbs terminology In the present document “shall“, “shall not“, “should“, “should not“, “may“, “need not“, “will“, “will not“, “can“ and “can
19、not“ are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of provisions). “must“ and “must not“ are NOT allowed in ETSI deliverables except when used in direct citation. Introduction IP-based services and their users are growing ever more sophi
20、sticated, and QoS is a feature which will be increasingly valuable for service differentiation and support. In contrast to wired or optical networks where over-provisioning of capacity is often used to ensure QoS for packet-based transport, satellite systems, as in other wireless networks and access
21、 networks in general, allocate capacity carefully according to needs. This requires more sophisticated QoS methods which are closely linked to resource provision and control at lower protocol layers than IP, and which take into account the presence of other non-real time traffic. There are many pote
22、ntial system mechanisms for providing QoS for real-time services; those which provide implementable and efficient solutions need to be identified. The general issues concerning Quality of Service (QoS) and architectures in BSM systems are described in ETSI TS 102 462 1. ETSI TS 102 357 2 describes f
23、urther specific QoS requirements. IETF RFC 2205 3 describes functional models for QoS concerning IP-over-satellite aspects. The BSM architecture is characterized by the separation between common Satellite-Independent (SI) protocol layers and alternative lower Satellite-Dependent (SD) layers ETSI TS
24、102 357 2. At the SI layers, several methods of ensuring end-to-end QoS over integrated networks are foreseen, by means of signalling protocols (e.g. based on SIP IETF RFC 3261 i.4, NSIS IETF RFC 4080 i.5, etc.) at the session (or application) layers and DiffServ, RSVP/IntServ at the IP layer. The p
25、resent document focuses on the latter approach. At the SD Layers, alternative lower protocol layers offer their own QoS characteristics, depending on the satellite system technology adopted, which are closely linked to lower layer resource management and control. The SI-SAP offers an “agnostic“ inte
26、rface to whichever SD layer is used. End-to-end QoS provision for the user via the BSM architecture is made capable of traversing the SI-SAP interface in a standardized way to enable compatibility between existing SI QoS functions in the IP layer and above, and the SD lower layer QoS capabilities. E
27、TSI ETSI TS 102 463 V1.2.1 (2015-08)6 1 Scope The present document defines an open specification for enabling QoS for IP-based multimedia satellite systems, based on the IntServ model, including the use of RSVP for resource allocation and control IETF RFC 2210 4. The focus is on the mapping of IP-la
28、yer QoS functions, primarily the Guaranteed (GS IETF RFC 2212 6) and Controlled Load (CL IETF RFC 2211 5) services, to BSM-specific QoS functions across the SI-SAP. This results in specifications for the SI-SAP including its interactions with higher and lower layers. The present document is based on
29、 the findings of the Technical Report on Performance, Availability and Quality of Service ETSI TR 102 157 i.2 and the Technical Specification on QoS Architecture ETSI TS 102 462 1. It is also based on current ETSI BSM architecture document ETSI TS 102 292 i.3 and is aligned with the relevant IETF st
30、andards. The key to providing real-time multimedia services such as those offered by the IntServ model is the interaction of a resource reservation protocol like RSVP with lower layer (i.e. link layer) resource reservation. For IntServ provision in a BSM network the concept of QIDs (Queue Identifier
31、s) at the SI-SAP is the concept used to provide this interaction with alternative link layers, ETSI TS 102 357 2. QIDs represent abstract queues, each with a defined class of service, for transfer of IP packets to the SD layers. The satellite dependent lower layers are responsible for assigning sate
32、llite capacity and/or particular forwarding behaviour to these abstract queues according to defined properties. The present document deals with the QoS issues arising in the management of these QIDs, when IntServ is adopted at IP layer. A BSM IntServ functional architecture is described and the func
33、tions, protocols and primitives needed to ensure QoS provision are specified. IntServ for unicast services is the primary focus of the present document, although the approach described may also be applicable to multicast. The use of other IP resource reservation protocols such as NSIS is at present
34、excluded from the present document. NOTE: RSVP can be used for a number of other functions, apart from IntServ Resource reservation, which are not in the scope of the present document: square4 DiffServ resource reservation. square4 Policy distribution. square4 Traffic engineering. 2 References 2.1 N
35、ormative 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 version applies. For non-specific references, the latest version of the reference document (including any amendments
36、) 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 in this clause were valid at the time of publication, ETSI cannot guarantee their long term validity. The follo
37、wing referenced documents are necessary for the application of the present document. 1 ETSI TS 102 462: “Satellite Earth Stations and Systems (SES); Broadband Satellite Multimedia (BSM); QoS Functional Architecture“. 2 ETSI TS 102 357: “Satellite Earth Stations and Systems (SES); Broadband Satellite
38、 Multimedia (BSM); Common Air interface specification; Satellite Independent Service Access Point (SI-SAP) interface: Primitives“. ETSI ETSI TS 102 463 V1.2.1 (2015-08)7 3 IETF RFC 2205: “Resource ReSerVation Protocol (RSVP) Version 1 Functional Specification“. 4 IETF RFC 2210: “The Use of RSVP with
39、 IETF Integrated Services“. 5 IETF RFC 2211: “Specification of the Controlled-Load Network Element Service“. 6 IETF RFC 2212: “Specification of Guaranteed Quality of Service“. 7 IETF RFC 2215: “General Characterization Parameters for Integrated Service Network Elements“. 2.2 Informative references R
40、eferences are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the reference document (including any amendments) applies. NOTE: Whil
41、e any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee their long term validity. The following referenced documents are not necessary for the application of the present document but they assist the user with regard to a particular subject area. i.1 ETSI
42、 TR 101 985: “Satellite Earth Stations and Systems (SES); Broadband Satellite Multimedia; IP over Satellite“. i.2 ETSI TR 102 157: “Satellite Earth Stations and Systems (SES); Broadband Satellite Multimedia; IP Interworking over satellite; Performance, Availability and Quality of Service“. i.3 ETSI
43、TS 102 292: “Satellite Earth Stations and Systems (SES); Broadband Satellite Multimedia (BSM) services and architectures; Functional architecture for IP interworking with BSM networks“. i.4 IETF RFC 3261: “SIP: Session Initiation Protocol“. i.5 IETF RFC 4080: “Next Steps in Signaling (NSIS): Framewo
44、rk“. 3 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. Three complementary types of architecture are defined: functional architecture: discrete functio
45、nal elements of the system and the associated logical interfaces network architecture: discrete physical (network) elements of the system and the associated physical interfaces protocol architecture: protocol stacks involved in the operation of the system and the associated peering relationships bea
46、rer service: type of telecommunication service that provides the capability for the transmission of signals between user-network interfaces behaviour aggregate: collection of packets with the same DS code point crossing a link in a particular direction BSM bearer service: telecommunication service t
47、hat a BSM subnetwork provides between a pair of SI-SAPs in different STs Best-effort service: offers no QoS guarantees, just end-to-end connectivity NOTE: When using queuing to prevent congestion BE queues are always the first ones to experience packet drop. ETSI ETSI TS 102 463 V1.2.1 (2015-08)8 Cl
48、ass Of Service (COS): defines a way to divide traffic into separate categories (classes) to provide (e.g. DiffServ) to each class within the network classification: examination of a packet to determine the CoS to which the packet should belong connection oriented: communication method in which commu
49、nication proceeds through three well-defined phases: connection establishment, data transfer, and connection release connectionless: communication method that allows the transfer of information between users without the need for connection establishment procedures Control Plane (CP): plane that 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 connections controlled load: integrated Service class defi
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