ETSI EN 302 636-5-1-2014 Intelligent Transport Systems (ITS) Vehicular Communications GeoNetworking Part 5 Transport Protocols Sub-part 1 Basic Transport Protocol (V1 2 1)《智能运输系统 (_1.pdf
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1、 ETSI EN 302 636-5-1 V1.2.1 (2014-08) Intelligent Transport Systems (ITS); Vehicular Communications; GeoNetworking; Part 5: Transport Protocols; Sub-part 1: Basic Transport Protocol EUROPEAN STANDARD ETSI ETSI EN 302 636-5-1 V1.2.1 (2014-08)2Reference REN/ITS-0030036 Keywords addressing, autonomic n
2、etworking, ITS, network, 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 de Grasse (06) N 7803/88 Important notice The present d
3、ocument can be downloaded from: http:/www.etsi.org The present document may be made available in electronic versions and/or in print. The content of any electronic and/or print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any exis
4、ting or perceived difference in contents between such versions and/or in print, the only prevailing document is the print of the Portable Document Format (PDF) version kept on a specific network drive within ETSI Secretariat. Users of the present document should be aware that the document may be sub
5、ject to revision or change of status. Information on the current status of this and other ETSI documents is available at http:/portal.etsi.org/tb/status/status.asp If you find errors in the present document, please send your comment to one of the following services: http:/portal.etsi.org/chaircor/ET
6、SI_support.asp 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 authori
7、zation of ETSI. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2014. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTMand the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members. 3GPPTM and LTE a
8、re 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 by the GSM Association. ETSI ETSI EN 302 636-5-1 V1.2.1 (2014-08)3Contents Intellectual Property Rights 4g3Foreword . 4g3Modal verbs ter
9、minology 4g3Introduction 4g31 Scope 6g32 References 6g32.1 Normative references . 6g32.2 Informative references 6g33 Definitions and abbreviations . 7g33.1 Definitions 7g33.2 Abbreviations . 7g34 Services provided by the Basic Transport Protocol . 8g35 Format convention 8g36 BTP packet structure 9g3
10、7 BTP header . 9g37.1 Overview 9g37.2 BTP-A header . 10g37.2.1 Structure of the BTP-A header . 10g37.2.2 Fields of the BTP-A header 10g37.3 BTP-B header . 10g37.3.1 Structure of the BTP-B header 10g37.3.2 Fields of the BTP-B header 11g38 Protocol operations . 11g38.1 General . 11g38.2 Source operati
11、ons . 11g38.3 Destination operations 12g3Annex A (informative): BTP data services . 13g3A.1 General . 13g3A.2 BTP-Data.request . 13g3A.3 BTP-Data.indication . 14g3Annex B (normative): Well-known BTP port numbers . 16g3Annex C (informative): Bibliography . 17g3History 18g3ETSI ETSI EN 302 636-5-1 V1.
12、2.1 (2014-08)4Intellectual 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: “Intelle
13、ctual 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
14、 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. Foreword This European Standard (EN) has been pro
15、duced by ETSI Technical Committee Intelligent Transport Systems (ITS). The present document is part 5, sub-part 1 of a multi-part deliverable. Full details of the entire series can be found in ETSI EN 302 636-1 2. National transposition dates Date of adoption of this EN: 14 July 2014 Date of latest
16、announcement of this EN (doa): 31 October 2014 Date of latest publication of new National Standard or endorsement of this EN (dop/e): 30 April 2015 Date of withdrawal of any conflicting National Standard (dow): 30 April 2016 Modal verbs terminology In the present document “shall“, “shall not“, “shou
17、ld“, “should not“, “may“, “may not“, “need“, “need not“, “will“, “will not“, “can“ and “cannot“ 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
18、direct citation. Introduction The Basic Transport Protocol (BTP) provides an end-to-end, connection-less transport service in the ITS ad hoc network. Its main purpose is the multiplexing of messages from different processes at the ITS facilities layer, e.g. CAM and DENM from the cooperative awarenes
19、s basic service and the distributed environmental notification basic service, for the transmission of packets via the GeoNetworking protocol as well as the de-multiplexing at the destination. BTP enables protocol entities at the ITS facilities layer to access services of the GeoNetworking protocol a
20、nd to pass protocol control information between the ITS facilities layer and the GeoNetworking protocol. ETSI ETSI EN 302 636-5-1 V1.2.1 (2014-08)5Message multiplexing/demultiplexing is based on ports, an ITS station-internal 16 bit address. A port represents a communication endpoint that identifies
21、 the ITS station protocol entity at the source (source port) or the destination (destination port). The usage of ports is similar to the two-stage packet transport in the IP protocol suite, where the IP provides the routing of packets from source to destination and the transport protocol, such as UD
22、P, multiplexes/demultiplexes messages from/to application processes. In the case of BTP, the GeoNetworking protocol transports the packets among the ITS stations and the BTP protocol delivers the packets to the entities at the ITS facilities layer. BTP also adopts the concept of “well-known ports“ f
23、rom the IP protocol suite that assigns fixed ports to specific ITS facilities layer protocols. The definition of the ports, however, is beyond the scope of the present document. BTP is a lightweight protocol: It has a 4-byte protocol header and requires minimal processing. It provides an unreliable
24、transport of packets, i.e. packets can arrive out-of-order, appear duplicated or can be lost. The design of BTP assumes that entities using the protocol are either tolerant against the unreliable packet transport or provide appropriate mechanisms for reliable communication in their protocols. ETSI E
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- ETSIEN302636512014INTELLIGENTTRANSPORTSYSTEMSITSVEHICULARCOMMUNICATIONSGEONETWORKINGPART5TRANSPORTPROTOCOLSSUBPART1BASICTRANSPORTPROTOCOLV121
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