1、 ETSI TS 102 462 V1.2.1 (2015-07) Satellite Earth Stations and Systems (SES); Broadband Satellite Multimedia (BSM); QoS Functional Architecture TECHNICAL SPECIFICATION ETSI ETSI TS 102 462 V1.2.1 (2015-07)2 Reference RTS/SES-00356 Keywords broadband, interworking, IP, multimedia, QoS, satellite ETSI
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7、I. 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 Mark
8、s 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 102 462 V1.2.1 (2015-07)3 Contents Intellectual Property Rights 6g3Foreword . 6g3Modal verbs terminology 6g3Intr
9、oduction 6g31 Scope 7g32 References 7g32.1 Normative references 7g32.2 Informative references . 8g33 Definitions and abbreviations . 10g33.1 Definitions . 10g33.2 Abbreviations 13g34 BSM QoS Service Requirements . 16g34.1 General 16g34.2 End-to-End and Bearer QoS 16g34.2.0 Introduction 16g34.2.1 Bea
10、rer Scenarios for BSM Systems . 18g34.2.1.1 BSM Star Network Topology 18g34.2.1.2 BSM Mesh Topology . 18g34.3 Generic End-to-End QoS Attributes 19g34.4 Multimedia Application QoS Classification 19g34.5 Relationship between BSM Traffic Classes and IP Traffic Classes 20g34.6 Service Requirements - Con
11、clusions . 21g35 BSM QoS Functional Architecture Requirements . 21g35.1 General 21g35.2 QoS Architecture Approach for IP Networks 21g35.3 QoS Network Building Blocks 22g35.4 Interactions between building blocks 23g35.4.0 Exchange of QoS parameters . 23g35.4.1 Options for QoS Architectures. 23g35.4.2
12、 QoS Signalling . 24g35.4.3 QoS Call Signalling and Policy Control Scenarios 24g35.4.3.0 General . 24g35.4.3.1 Proxied QoS with policy-push . 25g35.4.3.2 User-requested QoS with policy-pull . 26g35.4.3.3 User-requested QoS with policy-push-pull 26g35.4.3.4 User-originated application layer QoS signa
13、lling 27g35.5 Policy Control . 27g35.6 BSM Global QOS Architecture . 28g35.6.0 General . 28g35.6.1 ST. 30g35.6.1.0 Principal types 30g35.6.1.1 Diffserv operation 31g35.6.2 Resource Management . 32g35.6.2.0 General . 32g35.6.2.1 BSM Resource Controller 32g35.6.3 Guaranteed and Relative QoS Coexistenc
14、e . 34g35.6.4 QoS Routing 34g35.6.5 SIP Proxy . 34g35.7 QoS Architecture Requirements - Conclusion 34g36 BSM QoS Functional Architecture Definition . 35g36.1 Scope . 35g36.2 BSM QIDs . 35g36.2.0 General. 35g3ETSI ETSI TS 102 462 V1.2.1 (2015-07)4 6.2.1 QID Management 35g36.3 BSM SI-SAP . 36g36.4 QoS
15、 Cases . 36g36.4.0 Basic principle . 36g36.4.1 Case 1 36g36.4.1.0 General . 36g36.4.1.1 Key Features 37g36.4.2 Case 2 37g36.4.2.0 General . 37g36.4.2.1 Key Features 37g36.4.3 Case 3 38g36.4.3.0 General . 38g36.4.3.1 Key Features 38g36.4.4 Functional entities 42g36.4.5 Interfaces 42g36.5 Detailed arc
16、hitecture at the SI-SAP . 42g36.5.0 General . 42g36.5.1 User Plane 42g36.5.1.0 General . 42g36.5.1.1 ST Architecture 42g36.5.1.2 IP Queues . 43g36.5.1.2.1 Relative QoS . 43g36.5.1.2.2 Guaranteed QoS 44g36.5.1.3 QIDs . 44g36.5.1.4 Mapping between IP queues and QIDs 44g36.5.2 Hub Station Architecture
17、 45g36.5.3 Control Plane . 45g36.5.4 Management Plane . 45g36.6 DVB-RCS Example 46g3Annex A (informative): End-to-End Traffic Classes . 47g3Annex B (informative): BSM Traffic Classes 49g3Annex C (informative): QoS Building Block Functions 50g3C.0 General . 50g3C.1 User-plane mechanisms 50g3C.1.1 Tr
18、affic classification 50g3C.1.2 Packet marking 50g3C.1.3 Traffic policing 50g3C.1.4 Traffic shaping 51g3C.1.4.0 General . 51g3C.1.4.1 Congestion avoidance 51g3C.1.5 Queuing and scheduling 52g3C.1.6 Queue (or buffer) management . 52g3C.2 Control-plane mechanisms . 53g3C.2.1 Admission control . 53g3C.2
19、2 Resource reservation . 53g3C.3 Management-plane mechanisms 54g3C.3.1 Policy . 54g3C.3.2 QoS routing . 54g3C.3.3 Service level agreement . 55g3C.3.4 Provisioning 55g3C.3.5 Billing (Traffic metering and recording) . 55g3Annex D (informative): Example of DVB-RCS Queue implementation . 56g3D.1 Layer
20、3 QoS mechanisms . 56g3D.1.1 Layer 3 Qos Support On Forward Link . 56g3D.1.2 Layer 3 Qos Support On Return Link . 58g3ETSI ETSI TS 102 462 V1.2.1 (2015-07)5 D.1.2.1 Overview . 58g3D.1.2.2 ST role in QoS support on the RL . 58g3D.1.2.3 QoS levels on the return link . 60g3D.2 Layer 2 (MAC) QoS mechani
21、sms 61g3D.2.1 Introduction . 61g3D.2.2 Layer 2 Resource Organization . 62g3D.2.2.1 Logical resources (layer 2 addressing). 62g3D.2.2.1.0 General . 62g3D.2.2.1.1 Access topology . 62g3D.2.2.1.2 Mesh topology 63g3D.2.2.1.3 Multiple PVC model 64g3D.2.2.2 Physical resources 65g3D.2.3 Layer 2 Functionali
22、ty 66g3D.2.3.0 General . 66g3D.2.3.1 User plane functionality . 66g3D.2.3.2 Control plane functionality 67g3D.2.4 Return (Uplink) Link Dynamic Resource Control 69g3D.2.4.1 Overview . 69g3D.2.4.2 Resource organization in the Scheduler . 70g3D.2.4.3 Scheduling hierarchy . 71g3D.2.4.3.0 Concept 71g3D.2
23、4.3.1 Access topology . 71g3D.2.4.3.2 Mesh topology 72g3D.2.4.4 DVB-RCS capacity types 73g3D.2.4.4.0 Categories. 73g3D.2.4.4.1 Constant Rate Assignment (CRA) . 73g3D.2.4.4.2 Rate Based Dynamic Capacity (RBDC) 74g3D.2.4.4.3 Volume Based Dynamic Capacity (VBDC) . 74g3D.2.4.4.4 Free Capacity Assignmen
24、t (FCA) 74g3D.2.4.4.5 Mapping of MAC QoS classes into capacity types 75g3D.2.4.5 Capacity requesting mechanisms . 76g3D.2.4.6 Outline of the capacity scheduling process 77g3D.2.4.6.0 General . 77g3D.2.4.6.1 Access topology . 77g3D.2.4.6.2 Mesh topology 77g3History 79g3ETSI ETSI TS 102 462 V1.2.1 (20
25、15-07)6 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 can be found in ETSI SR 000 314: “Intellectual
26、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.etsi.org). Pursuant to the ETSI IPR Policy, no investigation, including IPR s
27、earches, 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 the present document. Foreword This Technical Specification (TS) has been pro
28、duced 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 “cannot“ are to be interpreted as described in clause 3.2 of the ETSI Drafting
29、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 sophisticated, and QoS is a feature which will be increasingly valuable for serv
30、ice differentiation and support of more sensitive applications (e.g. MMoIP). In contrast to wired or optical networks where over-provisioning of capacity is often used to ensure QoS for packet-based transport, in satellite systems, as in other wireless networks and access networks in general, capaci
31、ty is precious and is carefully allocated. This requires more sophisticated QoS methods which are closely linked to resource provision and control at lower protocol layers than IP. QoS provision within BSM systems themselves is one of the first aims, but since BSM systems are intended for use within
32、 the Internet, end-to-end QoS across integrated networks including satellites is also a key aspect that will be needed to be enabled by BSM systems. The general issues concerning Quality of Service (QoS) and architectures in BSM systems are described in ETSI TR 101 984 i.3. ETSI TR 101 985 i.4 descr
33、ibes further specific QoS requirements. ETSI TR 102 157 i.5 describes functional models for QoS concerning IP-over-satellite aspects. The present document takes the requirements of the above documents and defines functional architectures that are needed within BSM systems to implement end-to-end QoS
34、 for IP-based applications with the potential to run over integrated network scenarios. Compatibility with QoS requirements for generic internetworking, such as those from IETF, ETSI TISPAN are taken into account . The BSM architecture is characterized by the separation between common Satellite-Inde
35、pendent (SI) protocol layers and alternative lower Satellite-Dependent (SD) layers 3. 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.28), NSIS, etc.) the session (or application)
36、 layers and DiffServ, RSVP/IntServ at the IP layer. At the SD Layers alternative lower protocol layers offer different QoS characteristics. The focus of the architecture definition here is on maintaining compatibility with these alternative methods and approaches by addressing the generic BSM QoS fu
37、nctions required in the IP and Satellite-Independent layers. These functions will provide interfaces where appropriate with higher-layer and lower-layer QoS functions, and with external networks and customer equipment. ETSI ETSI TS 102 462 V1.2.1 (2015-07)7 1 Scope The present document defines a BSM
38、 functional architecture required to provide multimedia Quality of Service to the end user. This architecture identifies the functional elements to allow QoS provision in BSM systems integrated with heterogeneous networks. It includes the interfaces of these elements to other QoS functional elements
39、 in adjacent networks and customer equipment, and in higher or lower protocol layers. The multimedia services targeted are based on the Internet Protocol (IP) and use the QoS capabilities of IP as far as necessary, without relying on the support of other underlying protocols (such as MPLS). QoS for
40、unicast rather than multicast services is the primary focus. A key feature of the BSM architecture is the SI-SAP. The way in which the QoS functions interact across the SI-SAP is also illustrated in the architecture. The approach adopted is to define the following aspects in sequence: the QoS servic
41、e requirements; the global QoS functional and network architecture requirements in which BSM systems will play a role; the detailed BSM QoS architecture of main functional blocks (STs, etc.). Several architectural cases are illustrated for QoS provision. These cases are intended to show the potentia
42、l evolution from a simple QoS solution with quasi-static resource allocations to more sophisticated services with dynamic resource reservation. 2 References 2.1 Normative references References are either specific (identified by date of publication and/or edition number or version number) or non-spec
43、ific. For specific references, only the cited version 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.
44、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 following referenced documents are necessary for the application of the present document. 1 ETSI TS 102 292: “Satellite Earth Stations and Syst
45、ems (SES); Broadband Satellite Multimedia (BSM) services and architectures; Functional architecture for IP interworking with BSM networks“. 2 IETF RFC 2475: “An Architecture for Differentiated Services“. NOTE: Available at http:/www.ietf.org/rfc/rfc2475.txt. 3 ETSI TS 102 357: “Satellite Earth Stati
46、ons and Systems (SES); Broadband Satellite Multimedia (BSM); Common Air interface specification; Satellite Independent Service Access Point (SI-SAP) interface: Primitives“. 4 IETF RFC 2474: “Definition of the DS Field“. NOTE: Available at http:/www.ietf.org/rfc/rfc2474.txt. 5 IETF RFC 2597: “Assured
47、 Forwarding PHB Group“. NOTE: Available at http:/www.ietf.org/rfc/rfc2597.txt. ETSI ETSI TS 102 462 V1.2.1 (2015-07)8 6 IETF RFC 2598: “An Expedited Forwarding PHB Group“. NOTE: Available at: http:/www.ietf.org/rfc/rfc2598.txt. 2.2 Informative references References are either specific (identified by
48、 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: While any hyperlinks included in this clause wer
49、e 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 TS 102 295: “Satellite Earth Stations and Systems (SES); Broadband Satellite Multimedia (BSM) services and architectures; BSM Traffic Classes“. i.2 ETSI TS 101 192: “Digital Video Broadcasting (DVB); DVB specification for data broadcasting“. i.3 ETSI TR 101 984: “Satellite Earth Statio
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