netman 2008-4-13 23:12
ANSI/IEEE Std 802.5-1998E(R2003)
【资料成文时间】： (Revision of ANSI/IEEE 802.5-1995)
(Adopted by ISO/IEC and redesignated as
ISO/IEC 8802-5:1995)Adopted by the ISO/IEC and redesignated as
ISO/IEC 8802-5: 1998E
【语言】：E
【页数】： 260
【何人（公司）所著】： IEEE
【文件格式】： PDF
【文件原名】：
【摘要或目录】：
Contents
1. Overview............................................................................................................................................. 1
1.1 Scope........................................................................................................................................... 1
1.2 Normative references ................................................................................................................... 3
1.3 Definitions................................................................................................................................... 4
1.4 Conventions ................................................................................................................................ 9
1.5 Abbreviations and acronyms........................................................................................................ 9
1.6 Conformance requirements—station ......................................................................................... 12
1.7 Conformance requirements—concentrator................................................................................ 13
1.8 Local regulations....................................................................................................................... 13
2. General description ............................................................................................................................ 14
2.1 Architectural view...................................................................................................................... 14
2.2 Station functional organization and data flow ........................................................................... 14
2.3 Physical structure of a token ring network ................................................................................ 17
2.4 Data stations, servers, and system management ........................................................................ 18
3. Formats and facilities........................................................................................................................ 20
3.1 Formats ..................................................................................................................................... 20
3.2 Field descriptions ....................................................................................................................... 21
3.3 Medium Access Control (MAC) frames.................................................................................... 29
3.4 System timing parameters.......................................................................................................... 41
3.5 Station policy flags .................................................................................................................... 44
3.6 Error counters............................................................................................................................ 46
4. Token ring protocols .......................................................................................................................... 48
4.1 Overview................................................................................................................................... 48
4.2 Specification definitions ............................................................................................................ 62
4.3 Token ring MAC protocol specification .................................................................................... 79
5. Station specific components ............................................................................................................ 105
5.1 General.................................................................................................................................... 105
5.2 Data signaling rate ................................................................................................................... 110
5.3 Symbol coding (differential Manchester 1, 0, J, K)................................................................. 111
5.4 Repeat path.............................................................................................................................. 112
5.5 Symbol encoder ....................................................................................................................... 112
5.6 Symbol decoder ....................................................................................................................... 113
5.7 Symbol acquisition/loss and timing synchronization .............................................................. 113
5.8 Latency.................................................................................................................................... 114
5.9 Ring access control .................................................................................................................. 116
6. Token ring management .................................................................................................................. 117
6.1 Station management primitives................................................................................................ 117
6.2 Token ring station managed objects ........................................................................................ 123
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Copyright © 1998 IEEE. All rights reserved.
7. Station attachment specifications..................................................................................................... 144
7.1 Media-independent PHY specifications .................................................................................. 144
7.2 Media-dependent PMC specifications ..................................................................................... 146
8. Concentrator specifications.............................................................................................................. 173
8.1 Concentrator lobe port ............................................................................................................. 173
8.2 Concentrator trunk ports .......................................................................................................... 175
8.3 Ring access control function.................................................................................................... 176
8.4 Passive concentrator................................................................................................................. 178
8.5 Active retiming concentrator ................................................................................................... 182
ANNEXES
Annex A (normative) Protocol Implementation Conformance Statement (PICS) proforma .................... 184
Annex B (normative) Channel design considerations............................................................................... 198
Annex C (informative) Jitter considerations ............................................................................................. 210
Annex D (informative) Transmitter example ............................................................................................ 220
Annex E (informative) Safety and environmental considerations ............................................................ 222
Annex F (informative) Low-level finite state machines (FSMs).............................................................. 224
Annex G (informative) Differences from 1992 version ............................................................................ 229
Annex H (informative) Example of a MAC frame parsing algorithm ...................................................... 233
Annex I (informative) Recommended use of priorities for token ring .................................................... 235
Annex J (informative) Bibliography ........................................................................................................ 241
Annex P (normative) Bit error rate (BER) criteria for lobe media testing ............................................... 242