1、 ETSI TS 102 636-6-1 V1.1.1 (2011-03)Technical Specification Intelligent Transport Systems (ITS);Vehicular Communications;GeoNetworking;Part 6: Internet Integration;Sub-part 1: Transmission of IPv6 Packets overGeoNetworking ProtocolsETSI ETSI TS 102 636-6-1 V1.1.1 (2011-03) 2Reference DTS/ITS-003000
2、5 Keywords ITS, IPv6, addressing, network, point-to-multipoint, point-to-point, protocol 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 Association but non lucratif enregistre la Sous-Prfecture
3、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 or perceived difference in contents between such versions
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6、p 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 reserved. DECTTM, PLUGTESTSTM, UMTSTM, TIPHONTM, the TIPHON
7、 logo and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members. 3GPPTM is a Trade Mark of ETSI registered 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 th
8、e 3GPP Organizational Partners. GSM and the GSM logo are Trade Marks registered and owned by the GSM Association. ETSI ETSI TS 102 636-6-1 V1.1.1 (2011-03) 3Contents Intellectual Property Rights 6g3Foreword . 6g3Introduction 6g31 Scope 8g32 References 9g32.1 Normative references . 9g32.2 Informative
9、 references 10g33 Definitions, symbols and abbreviations . 12g33.1 Definitions 12g33.2 Symbols 12g33.3 Abbreviations . 12g34 GN6ASL in the ITS station architecture 13g35 IPv6 link models and interfaces . 14g35.1 Rationales . 14g35.2 Required properties of supported IPv6 link models . 15g35.2.1 Numbe
10、r and types of virtual link 15g35.2.2 Geographical virtual links . 15g35.2.3 Topological virtual links . 15g35.3 Recommended properties of virtual interfaces . 15g35.3.1 Number and types of virtual interfaces . 15g35.3.2 Usage of specific virtual interfaces . 16g35.3.2.1 Ethernet V2.0/IEEE 802.3 LAN
11、 virtual interfaces 16g35.3.2.2 NBMA virtual interfaces . 16g35.3.2.3 Point-to-point virtual interfaces 16g36 Bridging support . 17g36.1 Rationales . 17g36.2 Required properties 18g36.3 Media-dependent implementations 18g36.3.1 IEEE 802 integration service 18g37 IPv6/GeoNetworking interface service
12、specification . 19g38 Encapsulation characteristics . 19g38.1 Maximum transmission unit . 19g38.2 Packet delivery . 19g38.2.1 Outbound traffic 19g38.2.2 Inbound traffic 21g38.3 Frame format 22g39 IPv6 multicast and anycast support 23g39.1 Overview 23g39.2 Legacy IPv6 multicast support . 23g39.2.1 IP
13、v6 link-local multicast . 23g39.2.2 IPv6 wider-scope multicast. 24g39.2.3 Geocasting of legacy IPv6 multicast traffic 24g39.3 Legacy IPv6 anycast support 24g310 IPv6 neighbor discovery support 24g310.1 On-link determination 24g310.2 Address configuration 25g310.2.1 Stateless address autoconfiguratio
14、n 25g310.2.2 Stateful address configuration. 25g310.2.3 Manual address configuration . 26g310.3 Address resolution 26g3ETSI ETSI TS 102 636-6-1 V1.1.1 (2011-03) 410.3.1 Non-ND-based address resolution 26g310.3.2 ND-based address resolution 26g310.4 Neighbor unreachability detection . 27g310.5 Protoc
15、ol constants. 27g311 Support for pseudonym change 27g311.1 Rationales . 27g311.2 Required operations 28g3Annex A (normative): ASN.1 encoding of the GN6ASL MIB 29g3A.1 Modules 29g3A.1.1 ITSGN6ASL-MIB 29g3Annex B (normative): MIB attributes 32g3B.1 ITSGN6ASL-MIB attributes values . 32g3Annex C (inform
16、ative): IPv6/GeoNetworking data SAP 33g3C.1 Basic data SAP (GN6_SAP) 33g3C.1.1 Overview 33g3C.1.2 Service primitives . 33g3C.1.2.1 GN6-UNITDATA.request 33g3C.1.2.1.1 Semantics 33g3C.1.2.1.2 When generated . 33g3C.1.2.1.3 Effect on receipt 33g3C.1.2.2 GN6-UNITDATA.indication 34g3C.1.2.2.1 Semantics 3
17、4g3C.1.2.2.2 When generated . 34g3C.1.2.2.3 Effect on receipt 34g3C.2 Experimental extended data SAP (EGN6_SAP) 34g3C.2.1 Overview 34g3C.2.2 Service primitives . 35g3C.2.2.1 EGN6-UNITDATA.request 35g3C.2.2.1.1 Semantics 35g3C.2.2.1.2 When generated . 35g3C.2.2.1.3 Effect on receipt 35g3C.2.2.2 EGN6-
18、UNITDATA.indication . 35g3C.2.2.2.1 Semantics 35g3C.2.2.2.2 When generated . 36g3C.2.2.2.3 Effect on receipt 36g3Annex D (informative): Geographic IPv6 multicast support (experimental) . 37g3D.1 Overview 37g3D.2 Pre-defined geographical IPv6 multicast groups 37g3D.3 Other studied mechanisms 37g3Anne
19、x E (informative): Exemplary implementations . 39g3E.1 Virtual links and interfaces . 39g3E.2 Packet delivery with Ethernet V2.0/IEEE 802.3 LAN virtual interfaces . 39g3E.2.1 Outbound traffic . 39g3E.2.2 Inbound traffic 40g3E.3 Bridging support . 40g3E.4 GeoNet project implementations results 41g3An
20、nex F (informative): Support for Network Mobility Basic Support . 42g3F.1 Purpose of this annex . 42g3ETSI ETSI TS 102 636-6-1 V1.1.1 (2011-03) 5F.2 Mode of operation via GN6ASL 42g3F.3 Sub-optimal routing issues . 42g3Annex G (informative): Security and privacy considerations 43g3G.1 Purpose of thi
21、s annex . 43g3G.2 Recommendations for security mechanisms 43g3G.3 Recommendations for privacy-protecting deployment 43g3Annex H (informative): Bibliography . 44g3History 45g3ETSI ETSI TS 102 636-6-1 V1.1.1 (2011-03) 6Intellectual Property Rights IPRs essential or potentially essential to the present
22、 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); Essential, or potentially Essential, IPRs notified to ETSI in respe
23、ct of ETSI standards“, which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (http:/webapp.etsi.org/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
24、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 Committee Intelligent Transport System (ITS). The p
25、resent document is part 6, sub-part 1 of a multi-part deliverable covering GeoNetworking and Transport, as identified below: Part 1: “Requirements for GeoNetworking and Data Transport Protocol “; Part 2: “Scenarios for GeoNetworking“; Part 3: “Network architecture“; Part 4: “Geographical addressing
26、and forwarding for point-to-point and point-to-multipoint communications; Part 5: “Transport protocols“; Part 6: “Internet integration“; Sub-part 1: “Transmission of IPv6 Packets over GeoNetworking Protocols“; Part 7: “Network management“; Introduction The ETSI GeoNetworking protocol i.25 and i.26 i
27、s a non-IP network-layer protocol that provides geographic addressing and forwarding. Applications and facilities specifically designed for GeoNetworking exploit these functionalities, for example to disseminate warning or generic information messages to geographically scoped areas. This approach sa
28、tisfies the requirements of several ITS services, whose application domain is limited to networks that are disconnected from large existing network infrastructures. However, several ITS applications require the integration of ITS stations with larger networks like private transport networks or the I
29、nternet. In order to connect networks based on GeoNetworking to networks running the Internet Protocol (IP), which represent the majority of currently deployed large networks, it is necessary to allow GeoNetworking stations to act like Internet hosts or routers. ETSI Technical Committee ITS recogniz
30、es IP version 6 (IPv6,7) as the primary and only version of IP to be necessarily supported by ITS stations. The present document introduces a set of mechanisms that allow GeoNetworking to transport IPv6 packets without introducing modifications to existing IPv6 protocol implementations. By deploying
31、 these mechanisms, the following two main advantages are achieved: 1) coverage offered by point-of-attachment to the Internet like road-side ITS stations is extended by means of sub-IP geographic routing; and 2) IPv6 multicast traffic can be geocasted, i.e. addressed and delivered to all ITS station
32、s currently located within a geographic area. ETSI ETSI TS 102 636-6-1 V1.1.1 (2011-03) 7The present document includes a data SAP that enables an IPv6 protocol entity to send and receive packets over GeoNetworking. This SAP is defined in annex C. The present document does not include a management SA
33、P towards the ITS station management entity. NOTE: In the reminder of the present document, when the sole term “GeoNetworking“ is used, it is to be intended as the ETSI GeoNetworking protocol consisting of the combination of the media-independent part i.25 and at least one of the media-dependent par
34、ts (such as i.26). It should be noted that the media-dependent extensions do not represent distinct protocol layers. ETSI ETSI TS 102 636-6-1 V1.1.1 (2011-03) 81 Scope The present document specifies the transmission of IPv6 packets over the ETSI GeoNetworking protocol i.25 via a protocol adaptation
35、sub-layer referred to as the GN6ASL (GeoNetworking to IPv6 Adaptation Sub-Layer). The scope of the present document is limited to the GN6ASL. The techniques specified in the present document fulfil the requirements for GeoNetworking and IPv6 integration described in 3, clause 5.9. In particular, the
36、se techniques allow for the transport of IPv6 packets by ETSI GeoNetworking protocol i.25, enabling sub-IP multi-hop delivery of IPv6 packets, e.g. in a vehicular network. As a result, the connectivity provided by point-of-attachments to IPv6 infrastructure networks is extended by means of mobile re
37、lay nodes. In addition to that, the techniques described in the present document allow for geocasting of IPv6 multicast packets. The scope of the GN6ASL is limited to the fulfilment of the requirements for GeoNetworking and IPv6 integration described in 3, clause 5.9, by enabling an ITS station incl
38、uding a Geoadhoc router 5 running GeoNetworking and an IPv6-compliant protocol layer to: 1) exchange IPv6 packets with other ITS stations using link-local IPv6 addresses; 2) acquire globally routable IPv6 unicast addresses and communicate with an arbitrary IPv6 host located in the Internet, whenever
39、 an ITS station including a Geoadhoc router and including or connected to an access router 5 providing IPv6 connectivity to the Internet is reachable directly or via other relay ITS stations; 3) to perform the operations required by 20 for a Mobile Router whenever i) an ITS mobile router supporting
40、Network Mobility Basic Support (NEMO BS) 20 is present in the ITS station and runs on top of the GN6ASL and ii) an ITS station including a Geoadhoc router and including or connected to an access router 5 providing IPv6 connectivity to the Internet is reachable directly or via other relay ITS station
41、s. NOTE: The present document adopts the definition of “IPv6-compliant“ and “sub-IP multi-hop delivery“ introduced in clause 3.1. Extending the IPv6 basic standards 7, 8, 9, 10 and 12 to support new features is outside the scope of the present document. Extensions to NEMO BS 15 are outside the scope
42、 of the present document. Mechanisms for the dissemination of IPv6 routing information for hosts and routers not directly attaching to the network where GeoNetworking is used are outside the scope of the present document (e.g. discovery of IPv6 in-vehicle prefixes). However, the present document aim
43、s at providing the underlying support for the dissemination of such routing information, i.e. IPv6 multicast support for the network where the GeoNetworking protocol is used. With respect to IPv6 multicast and anycast support, the present document is limited to the support required to enable distrib
44、ution of IPv6 multicast and anycast traffic on a shared link. Amendments to specific IPv6 multicast forwarding mechanisms are out of the scope of the present document. However, the present document aims at not preventing existing IPv6 multicast forwarding mechanisms from being used in conjunction wi
45、th the GN6ASL. In order to facilitate the deployment of ITS systems, the present document aims at maintaining backward compatibility with pre-existent IPv6-compliant protocol implementations and NEMO BS implementations compliant with 15. An exemplary usage of NEMO BS with the GN6ASL is overviewed in
46、 the informative annex F. The present document does not request any assignment or reservation of IPv6 prefixes or suffixes for specific purposes. The mechanisms specified in the present document are distinct from but compatible with the IPv6-related functionalities in i.24, which specifies how IPv6
47、networking is generally operated in ITS stations. The techniques described in the present document provide a way to transport IPv6 packets that is fully compatible with the IPv6 specifications and pre-existing implementations, and hence is compatible with i.19. ETSI ETSI TS 102 636-6-1 V1.1.1 (2011-
48、03) 92 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)
49、applies. Referenced documents which are not found to be publicly available in the expected location might be found at http:/docbo0x.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. 2.1 Normative references The following referenced documents are necessary for the application of the present document. 1 ETSI EN 302 665: “Intelligent Transport Systems (ITS); Communications Architecture“. 2 ETSI ES 202 663: “Intelligent Trans
