1、 TIA-4957.300 February 2013Layer 3 Standard Specification for the Smart Utility Network ANSI/TIA-4957.300-2013 APPROVED: FEBRUARY 5, 2013 NOTICE TIA Engineering Standards and Publications are designed to serve the public interest through eliminating misunderstandings between manufacturers and purcha
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22、ts 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 . - 4 - 11 4.1 Addressing . - 4 -
23、12 4.2 Network Layer Profile . - 4 - 13 4.3 Use of Data Link Data Service - 5 - 14 5 Data Structures - 6 - 15 5.1 Representation Order . - 6 - 16 5.2 Network Layer Packet Format . - 6 - 17 6 Network Layer Service - 7 - 18 6.1 Network Layer Data Interface. - 7 - 19 6.2 Protocol Identifiers - 7 - 20 6
24、.3 Network Layer Constants - 7 - 21 Table of Figures 22 Figure 1 Network Layer Profile Communications Model - 4 - 23 Figure 2: General Network Layer Packet Format . - 6 - 24 Figure 3: Protocol Identifiers - 7 - 25 Figure 4: Network Layer Constants - 7 - 26 27 ANSI/TIA-4957.300 iii Foreword (This for
25、eword is not part of this standard) 1 This document is a TIA Telecommunications Standard produced by the Layer 3 Working Group of the TR51 Committee. 2 The standard was produced in accordance with TIA procedural guidelines, and represents the consensus of the Working 3 Group and its parent committee
26、 which served as the formulating group. 4 The standard consists of 3 clauses. The normative Overview clause describes the principles and intended operation of an 5 implementation of the standard. The normative Data Structures clause defines the specific Network Layer packet structure 6 supported by
27、this standard and the normative Network Layer Service clause defines specific parameter values to be used in 7 the invocation of the TR51 Data Link service. 8 The TR51 Layer 3 group officers wish to acknowledge the contributions and support of the following TR51 members in the 9 preparation of this
28、standard: 10 Organization Representatives TIA-TR51 MJLynch 17 ANSI/TIA-PN-4957.100 (7) relaxes the requirements for packet size constraints allowing ANSI/TIA-PN-18 4957.200 (8) frames to encapsulate fragmented or non-fragmented IP packets; 19 There is a requirement to minimize packet sizes for energ
29、y and spectrum efficiency; 20 There is no IEEE registered protocol identifier for RFC 4944 (3)/RFC 6282 (4) (6LoWPAN) (see 6); 21 this specification: 22 endorses the Network Layer protocol defined in RFC 4944, as amended by RFC 6282 with: 23 Support of the 6LoWPAN dispatch type for uncompressed IPv6
30、 Headers 24 Replacement of references to IEEE 802.15.4 and its services and facilities with references to ANSI/TIA-25 PN4957.200 services and facilities and specifically references to IEE 802.15.4 MAC Address (whether 26 EUI64 or 16-bit short addresses) with ANSI/TIA-PN4957.200 MAC Addresses 27 ANSI
31、/TIA-4957.300 - 5 - 1 Defines a protocol identifier for 6LoWPAN in the reserved range for protocol identifiers defined in 2 ANSI/TIA-PN-4957.210 3 4.3 Use of Data Link Data Service 4 Invocation of the Data Link data transfer service is as defined in ANSI/TIA-PN4957.210 with: 5 The Protocol ID parame
32、ter set to c6LoWPan as defined in Figure 4. 6 7 ANSI/TIA-4957.300 5 Data Structures 1 5.1 Representation Order 2 Data representation for this specification is as defined for 6LoWPAN in RFC 4944 3. 3 5.2 Network Layer Packet Format 4 The general format of the Network Layer packet is as defined in RFC
33、 4944 and shown in Figure 2. 5 Octets: 1 40 Variable 6LoWPAN Dispatch IPv6 Header IPv6 Payload Figure 2: General Network Layer Packet Format 6 The 6LoWPAN Dispatch field is set to cIPv6Header (see 4). 7 The IPv6 Header field is set according to RFC 2460 (see 2). 8 The IPv6 Payload field is set to Ne
34、twork Layer Client data. 9 ANSI/TIA-4957.300 - 7 - 6 Network Layer Service 1 6.1 Network Layer Data Interface. 2 No specific Network Service is defined in this specification. 3 6.2 Protocol Identifiers 4 This specification updates the ANSI/TIA-PN4957.210 defined protocol identifiers as shown in Figu
35、re 3. 5 Protocol Identifier Field Value Description 0x0000 Reserved 0x0001 RAMP 0x0002 6LoWPAN 0x0003-0x02FF Reserved 0x0300-0x05FF Vendor Specific Protocol 0x600-0xFFFF IEEE Registered Protocol (see6) Figure 3: Protocol Identifiers 6 6.3 Network Layer Constants 7 Figure 4 defines constants for this
36、 specification. 8 Name Type Values Description c6LoWPAN Integer 0x0002 Protocol ID value for 6LowPAN cIPv6Header Integer 0x41 6LoWPAN Dispatch value for uncompressed IPv6 header format Figure 4: Network Layer Constants 9 10 11 ANSI/TIA-4957.300 THE TELECOMMUNICATIONS INDUSTRY ASSOCIATION TIA represe
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