1、 ETSI TS 102 464 V1.2.1 (2015-12) Satellite Earth Stations and Systems (SES); Broadband Satellite Multimedia (BSM); Interworking with DiffServ QoS TECHNICAL SPECIFICATION ETSI ETSI TS 102 464 V1.2.1 (2015-12)2 Reference RTS/SES-00357 Keywords broadband, interworking, IP, multimedia, QoS, satellite E
2、TSI 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: htt
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7、ETSI. 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 M
8、arks 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 102 464 V1.2.1 (2015-12)3 Contents Intellectual Property Rights 5g3Foreword . 5g3Modal verbs terminology 5g3I
9、ntroduction 5g31 Scope 6g32 References 6g32.1 Normative references . 6g32.2 Informative references 7g33 Definitions and abbreviations . 8g33.1 Definitions 8g33.2 Abbreviations . 10g34 Overview 11g35 DiffServ BSM Functional Architecture 12g35.0 Aim and Scope . 12g35.1 Overall BSM DiffServ Architectur
10、e . 12g35.2 ST DiffServ Architecture . 14g35.2.0 Overview 14g35.2.1 DiffServ Functions 15g35.2.1.0 Introduction . 15g35.2.1.1 User-Plane Functions 15g35.2.1.2 Control-Plane Functions 16g35.2.2 Detailed Functional Architecture 17g35.2.2.0 U- and C-plane operations 17g35.2.2.1 Ingress ST DiffServ Func
11、tions 19g35.2.2.1.0 Detailed Functional Architecture . 19g35.2.2.1.1 RSVP . 20g35.2.2.1.2 NSIS 21g35.2.2.2 Egress ST DiffServ Functions . 21g36 DiffServ QID Management 21g36.0 Aim and Scope . 21g36.1 Description . 21g36.2 QID Relationship to SD Resource Reservation 22g36.2.0 QID-to-SD Mapping . 22g3
12、6.2.1 Static SD Resources 23g36.2.1.0 Overview . 23g36.2.1.1 Static QIDs 23g36.2.1.2 Dynamic QIDs 23g36.2.2 Dynamic SD Resources 24g36.2.2.0 Overview . 24g36.2.2.1 Static QIDs 25g36.2.2.2 Dynamic QIDs 25g36.2.3 Summary . 26g36.3 QID Relationship to SI layers. 26g36.3.0 DiffServ Per Hop Behaviours (P
13、HBs) 26g36.3.1 Best Effort . 27g36.3.2 Expedited Forwarding. 28g36.3.3 Assured Forwarding 29g36.3.4 Class Selector 30g36.3.5 Summary . 31g3Annex A (informative): Relationship to the RSM-B Air Interface family (DVB-RCS) . 32g3A.0 General . 32g3ETSI ETSI TS 102 464 V1.2.1 (2015-12)4 A.1 SATLIFE satell
14、ite system summary . 32g3A.2 SATLIFE QoS model . 33g3A.3 RCST/NCC Model . 35g3A.3.0 Overview 35g3A.3.1 User Plane 35g3A.3.2 Control Plane 36g3Annex B (informative): Relationship to the TSS-A Air Interface Family (DVB-RCS) . 37g3Annex C (informative): DiffServ DSCPs 38g3Annex D (informative): Bibliog
15、raphy . 39g3History 40g3ETSI ETSI TS 102 464 V1.2.1 (2015-12)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 members and non-membe
16、rs, 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.etsi.org). Pursuant to
17、 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 the present document.
18、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 “cannot“ are to be inter
19、preted 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 The BSM architecture is characterized by the separation between common Satellite-
20、Independent (SI) protocol layers and alternative lower Satellite-Dependent (SD) layers, which are connected through the Satellite Independent Service Access Point (SI-SAP) 1. The general issues concerning the architecture of BSM systems are described in ETSI TR 101 984 i.1, further specific requirem
21、ents and functional models for Quality of Service (QoS) concerning IP-over-satellite aspects are presented in ETSI TR 101 985 i.2 and ETSI TR 102 157 i.3. In general the SI-SAP offers an agnostic interface to whichever SD layer is used. So QoS provision in the BSM architecture has to face the issue
22、of traversing the SI-SAP interface by means of standardized signalling, which is expected to enable on one side maintaining compatibility with existing QoS functions required in the IP layers and above, and on the other side communication to the lower layer entities deputed to QoS accomplishment. At
23、 the IP layer, two principal techniques for QoS provision exist: DiffServ 7, and RSVP/IntServ 4, 5. At the SD layers more sophisticated QoS methods are closely linked to lower layer resource management and control, they strongly depend on the satellite technology adopted and on the particular implem
24、entation. For QoS provision in a BSM network the concept of QIDs (Queue Identifiers) is a key concept 2. They 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 satellite cap
25、acity and/or particular forwarding behaviour to these abstract queues according to defined properties. The reader should in particular refer to ETSI TS 102 463 i.14, for a detailed description of QIDs and of the associated primitives. ETSI ETSI TS 102 464 V1.2.1 (2015-12)6 1 Scope The aim of the pre
26、sent document is to define an open specification for enabling QoS for IP-based multimedia satellite systems, based on the DiffServ model. If IP packets entering the BSM network require a particular QoS treatment, they have to be mapped onto QIDs. The choice of the QID to be used inside the BSM netwo
27、rk is thus particularly important. So the present document specifies the allocation of the QIDs and their mapping to IP QoS classes, when DiffServ is used to provide QoS at IP layer. The present document assumes the QoS functional architecture described in ETSI TS 102 462 2. The present document des
28、cribes in detail how QIDs are defined, how they are allocated and handled by the BSM network, and the requirements needed by sending and receiving Satellite Terminals (STs) in a BSM network to provide QID management functionalities. The present document also defines the primitives that should be use
29、d across the SI-SAP when allocating QIDs, when mapping DiffServ Code Points (DSCPs) and IP services to QIDs, when mapping QIDs to SD queues. Details on the QID mapping are presented with some examples. Some cases are presented to show the potential evolution from a simple QoS solution with quasi-sta
30、tic QID allocation to more sophisticated services with dynamic resource reservation. The combination of DiffServ with multicast transmissions is out of scope of the present document, as well as the use of Explicit Congestion Notification (ECN), which was linked to DiffServ only for historical reason
31、s, as the ECN bits are the two least significant bits of the IPv4 ToS octet. This is better explained in clause 4. 2 References 2.1 Normative references References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references
32、, 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.org/Reference. NOTE: While an
33、y 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 102 357: “Satellite Earth Stations and Systems (SES); Broadband Satellit
34、e Multimedia (BSM); Common Air interface specification; Satellite Independent Service Access Point (SI-SAP) interface: Primitives“. 2 ETSI TS 102 462: “Satellite Earth Stations and Systems (SES); Broadband Satellite Multimedia (BSM); QoS Functional Architecture“. 3 IETF RFC 3168: “The Addition of Ex
35、plicit Congestion Notification (ECN) to IP“, September 2001. 4 IETF RFC 1633: “Integrated Services in the Internet Architecture: an Overview“, June 1994. 5 IETF RFC 2210: “The Use of RSVP with IETF Integrated Services“, September 1997. 6 IETF RFC 2474: “Definition of the Differentiated Services Fiel
36、d (DS Field) in the IPv4 and IPv6 Headers“, December 1998. 7 IETF RFC 2475: “An Architecture for Differentiated Service“, December 1998. 8 IETF RFC 2597: “Assured Forwarding PHB Group“, June 1999. 9 IETF RFC 3246: “An Expedited Forwarding PHB (Per-Hop Behavior)“, March 2002. ETSI ETSI TS 102 464 V1.
37、2.1 (2015-12)7 10 IETF RFC 3247: “Supplemental Information for the New Definition of the EF PHB (Expedited Forwarding Per-Hop Behavior)“, March 2002. 11 IETF RFC 3260: “New Terminology and Clarifications for Diffserv“, April 2002. 2.2 Informative references References are either specific (identified
38、 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: While any hyperlinks included in this clause
39、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 TR 101 984: “Satellite Earth Stations an
40、d Systems (SES); Broadband Satellite Multimedia (BSM); Services and architectures“. i.2 ETSI TR 101 985: “Satellite Earth Stations and Systems (SES); Broadband Satellite Multimedia; IP over Satellite“. i.3 ETSI TR 102 157: “Satellite Earth Stations and Systems (SES); Broadband Satellite Multimedia;
41、IP Interworking over satellite; Performance, Availability and Quality of Service“. i.4 IETF RFC 2998: “A Framework for Integrated Services Operation over Diffserv Networks“, November 2000. i.5 IETF RFC 4080: “Next Steps in Signaling (NSIS): Framework“, June 2005. i.6 Satellite Access Technologies: L
42、eading Improvements For Europe. NOTE: Available at http:/www.satlife.org i.7 Wittig, Manfred; Casas, Jose-Maria. “A communications switchboard in the sky: AmerHis“. ESA Bulletin, No. 115. August 2003. i.8 S. Chacn, J-L. Casas, A. Cal, R. Rey, J. Prat, A. Rodriguez, J. de la Plaza, C. Nieto, F. Ruiz
43、Piar. Multimedia Applications of the Integrated Broadcast Interaction System (IBIS). ESA Workshop on Digital Signal Processing, Lisbon (Portugal), October 2001. i.9 ETSI TS 102 429-1: “Satellite Earth Stations and Systems (SES); Broadband Satellite Multimedia (BSM); Regenerative Satellite Mesh - B (
44、RSM-B); DVB-S/DVB-RCS family for regenerative satellites; Part 1: System Overview“. i.10 “SatLabs System Recommentations v2.0“, November 2006. NOTE: Available at http:/satlabs.org/. i.11 S. Floyd and V. Jacobson “Random Early Detection Gateways for Congestion Avoidance“. IEEE/ACM Transactions on Net
45、working, Vol. 1, Issue 4, August 1993. i.12 ETSI TS 102 429-3: “Satellite Earth Stations and Systems (SES); Broadband Satellite Multimedia (BSM); Regenerative Satellite Mesh - B (RSM-B); DVB-S/DVB-RCS family for regenerative satellites; Part 3: Connection control protocol“. i.13 ETSI TS 102 402: “Sa
46、tellite Earth Station and systems (SES); Broadband Satellite Multimedia; Transparent Satellite Star - A (TSS-A); DVB-S/DVB-RCS for transparent satellites; Sub-family 1 (TSS-A1)“. i.14 ETSI TS 102 463: “Satellite Earth Stations and Systems (SES); Broadband Satellite Multimedia (BSM); Interworking wit
47、h IntServ QoS“. ETSI ETSI TS 102 464 V1.2.1 (2015-12)8 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 NOTE: Three complementary types of architecture
48、 are defined: 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 protoco
49、l stacks involved in the operation of the system and the associated peering relationships. bearer service: type of telecommunication service that provides the capability for the transmission of signals between user-network interfaces Behaviour Aggregate (BA): collection of packets with the same DS code point crossing a link in a particular direction Best-Effort (BE) service: service that offers no QoS guarantees, just end-to-end connectivity NOTE: When using queuing to prevent congestion BE queues are a
