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22、-PN-4957.210 Contents 1 1 Introduction . - 1 - 2 1.1 Scope and Purpose . - 1 - 3 1.2 Release History - 1 - 4 2 References . - 2 - 5 2.1 Normative References - 2 - 6 2.2 Informative References - 2 - 7 3 Definitions . - 3 - 8 3.1 Definitions . - 3 - 9 3.2 Acronyms . - 3 - 10 4 Overview & Architecture
23、- 4 - 11 4.1 Architecture . - 4 - 12 4.2 Overview . - 5 - 13 4.3 Addressing . - 6 - 14 4.4 Protocol Identifier - 6 - 15 4.5 Multi-Hop Delivery . - 7 - 16 4.5.1 Sequence Numbers . - 7 - 17 4.5.2 Broadcast and Multicast MHD-PDUs - 7 - 18 4.5.3 Neighbors . - 7 - 19 4.5.4 Routes - 7 - 20 4.6 RAMP - 8 -
24、21 4.6.1 Service Announcement - 8 - 22 4.6.2 Service Registration . - 9 - 23 4.6.3 Route Maintenance . - 9 - 24 4.6.4 Loops - 10 - 25 4.6.5 Timers - 10 - 26 4.6.6 Link Cost - 11 - 27 4.6.7 Link Quality . - 11 - 28 5 Data Structures - 12 - 29 5.1 Representation Order . - 12 - 30 5.2 MHD-PDU Format -
25、12 - 31 5.2.1 MHD-HDR . - 12 - 32 5.2.2 MHD-Control . - 12 - 33 5.2.3 Address List . - 13 - 34 5.2.4 MHD-PDU Data. - 13 - 35 5.3 RAMP Data Elements - 14 - 36 5.3.1 Route Announcement (RTA) Data Element. - 15 - 37 5.3.2 Service Registration (SREG) Data Element . - 15 - 38 5.3.3 SREG Acknowledgement (
26、SREG-ACK) Data Element - 16 - 39 5.3.4 SREG Negative Acknowledgement (SREG-NACK) Data Element - 16 - 40 5.3.5 Route Announcement Request (RTA-REQ) Data Element . - 16 - 41 5.3.6 Route Removal (RTR) Data Element . - 16 - 42 6 Data Link Service Access Points - 18 - 43 6.1 Data Link Data Interface (D-D
27、ATA) . - 18 - 44 6.1.1 D-DATA.request - 18 - 45 6.1.2 D-DATA.confirm . - 18 - 46 6.1.3 D-DATA.indication . - 18 - 47 6.2 Data Link Layer Management Service Access Point (DLM-DATA) - 19 - 48 6.2.1 DLM-Data.request . - 19 - 49 6.2.2 DLM-DATA.confirm . - 22 - 50 6.2.3 DLM-DATA_indication. - 22 - 51 6.3
28、 Data Link Layer Parameters & Constants - 23 - 52 ANSI/TIA-PN-4957.210 iii 7 Multi-Hop Delivery Sub-Layer Functional Specification . - 24 - 1 7.1 General Purpose Data Link Procedures . - 24 - 2 7.1.1 Construct a MHD-HDR . - 24 - 3 7.2 Forwarding a MHD-PDU - 25 - 4 7.3 MHD-PDU Reception Procedure - 2
29、5 - 5 7.4 MHD-PDU Transmission Procedure . - 26 - 6 8 RAMP Protocol . - 28 - 7 8.1 Local Broadcast . - 28 - 8 8.2 Periodic RAMP Actions - 28 - 9 8.3 Route Information Update . - 29 - 10 8.4 Generation of a RTA Data Element . - 29 - 11 8.5 Generation of a RTR MHD-PDU - 29 - 12 8.6 Generation of a SRE
30、G MHD-PDU - 30 - 13 8.7 Generation of a SREG-ACK MHD-PDU - 30 - 14 8.8 Generation of a SREG-NACK MHD-PDU . - 30 - 15 8.9 Generation of a RTA-REQ MHD-PDU . - 31 - 16 8.10 RAMP Reception Procedure - 31 - 17 8.10.1 RTA Data Element . - 32 - 18 8.10.2 SREG Data Element . - 32 - 19 8.10.3 SREG_ACK Data E
31、lement - 33 - 20 8.10.4 SREG-NACK Data Element - 33 - 21 8.10.5 RTA-REQ Data Element - 34 - 22 8.10.6 RTR Data Element . - 34 - 23 8.11 RAMP Transmission Procedure - 35 - 24 8.11.1 Route Announcement . - 35 - 25 8.11.2 Route Removal . - 36 - 26 8.11.3 Service Registration . - 36 - 27 8.11.4 Service
32、Registration Response . - 36 - 28 8.11.5 Service Registration Negative Response - 37 - 29 8.11.6 Route Announcement Request . - 37 - 30 Table of Figures 31 Figure 1 Multi-Hop Delivery Service Communications Model . - 4 - 32 Figure 2: Multi-Hop Delivery Architecture - 5 - 33 Figure 3: Multi-hop Data
33、Link Delivery . - 5 - 34 Figure 4: RAMP Entities - 6 - 35 Figure 5: General MHD-PDU Format - 12 - 36 Figure 6 MHD-HDR Format - 12 - 37 Figure 7 MHD-Control Field Format . - 12 - 38 Figure 8: MHD-HDR Protocol Field Values - 13 - 39 Figure 9: Address List Field Format . - 13 - 40 Figure 10: Normal Var
34、iant MHD-PDU Data Field Format - 13 - 41 Figure 11: Vendor Specific Protocol MHD-PDU Data Format - 13 - 42 Figure 12: Data Element Format - 14 - 43 Figure 13: Data Element Type Field Values . - 14 - 44 Figure 14: Sequence Number Data Element Format - 14 - 45 Figure 15 : RAMP Data Element Format . -
35、14 - 46 Figure 16 : RAMP Data Element ID Field Values . - 15 - 47 Figure 17 : RTA Data Element Format. - 15 - 48 Figure 18 : SREG Data Element Format - 15 - 49 Figure 19: Upstream Neighbor Descriptor . - 15 - 50 Figure 20 : SREG-ACK Data Element Format . - 16 - 51 Figure 21 : SREG-NACK Data Element
36、Format - 16 - 52 Figure 22 : RTA-REQ Data Element Format . - 16 - 53 Figure 23 : RTR Data Element Format . - 16 - 54 ANSI/TIA-PN-4957.210 Figure 24: D-Data.request Parameters - 18 - 1 Figure 25: D-Data.confirm Parameters . - 18 - 2 Figure 26: D-Data.indication Parameters . - 19 - 3 Figure 27: DLM-Da
37、ta.request Parameters - 19 - 4 Figure 28: DLM-Data.request Parameters for RAMP - 20 - 5 Figure 29: RAMP RTA Request Parameters - 20 - 6 Figure 30: RAMP Route Removal Request Parameters . - 21 - 7 Figure 31: RAMP Service Registration Request Parameters - 21 - 8 Figure 32: RAMP Service Registration Re
38、sponse Request Parameters . - 21 - 9 Figure 33: RAMP Negative Service Registration Response Request Parameters - 22 - 10 Figure 34: RAMP Route Announcement Request Parameters . - 22 - 11 Figure 35: DLM-Data.confirm Parameters . - 22 - 12 Figure 36: DLM-Data.indication Parameters . - 23 - 13 Figure 3
39、7: Data Link Layer Parameters & Constants . - 23 - 14 15 ANSI/TIA-PN-4957.210 v Foreward (This foreword is not part of this standard) 1 This document is a TIA Telecommunications Standard produced by the Layer 2 Working Group of the TR51 Committee. 2 The standard was produced in accordance with TIA p
40、rocedural guidelines, and represents the consensus of the Working 3 Group and its parent committee which served as the formulating group. 4 The standard consists of 5 clauses. The normative Overview and Architecture clause describes the principles and intended 5 operation of an implementation of the
41、 standard. The normative Data Structures clause defines the encoding and data 6 structures used to represent information. The Service Access Points clause provides data and management interface 7 definitions together with a set of parameters. The Service Access Point clause is informative since it i
42、s implementation 8 specific but is referenced in the description of parts of the normative Functional Specification clause. The Functional 9 Specification clause describes procedures to be executed by an implementation of the standard and is normative. The 10 normative RAMP protocol clause describes
43、 the procedures to be used in implementing the multi-hop functions defined in 11 this specification although other protocols may also be used to provide multi-hop delivery management. 12 The TR51 Layer 2 group officers wish to acknowledge the contributions and support of the following TR51 members i
44、n the 13 preparation of this standard: 14 Organization Representatives TIA-TR51 MJLynch & Associates Mike Lynch TR51 Chair Beecher Communications Phil Beecher Layer 2 Chair Analog Devices, Inc. Jeritt Kent Participant Blind Creek Consulting Ben Rolfe Participant DTC (UK) Larry Taylor Editor Ericsson
45、 Octavio Lima ParticipantNICT Fumihide Kojima Chin Sean Sum Participant Proto6 Geoff Mulligan ParticipantSilver Spring Networks Thomas Herbst Sterling Hughes Participant SUNA John Notor Participant15 Comments, corrections or requests for enhancement should be addressed to: 16 Telecommunications Indu
46、stry Association 17 Suite 200 18 1320 N. Courthouse Road 19 Arlington, VA 22201 20 (http:/www.tiaonline.org) 21 22 ANSI/TIA-PN-4957.210 - 1 - 1 Introduction 1 1.1 Scope and Purpose 2 This document defines a Forwarding sub-layer protocol and a Routing sub-layer protocol for the Data Link layer of TR5
47、1, 3 including processes, functions, service interfaces and externally visible frame formats. The Forwarding protocol provides 4 data transfer services between non-neighboring devices. The Routing protocol provides discovery and maintenance of 5 multi-hop routes between certain non-neighboring devic
48、es. 6 1.2 Release History 7 to be included when the standard is released and updated thereafter with each release 8 Date Version Author Comments 9 ANSI/TIA-PN-4957.210 2 References 1 2.1 Normative References 2 The following are referenced in this proposal: 3 1 ANSI/TIAPN4957.200 TR51 MAC SubLayer St
49、andard 4 2.2 Informative References 5 The following are referenced in this proposal: 6 2 IEEE Standards Association Registration Authority, http:/standards.ieee.org/develop/regauth/ 7 3 IEEEStandards Association Guidelines for 64bit Global Identifier (EUI64), 8 http:/standards.ieee.org/develop/regauth/tut/eui64.pdf 9 4 ITU X.200 / ISO/IEC 74981 OSI Basic Reference Model 10 ANSI/TIA-PN-4957.210 - 3 - 3 Definitions 1 3.1 Definitions 2 Forwarding Protocol A protocol for multi-hop packet delivery 3 Hold Down Interval The interval between determining a route is no longe
