IEEE 802.3u标准历史文档：1995年版本

5星 · 超过95%的资源需积分: 42 141 浏览量更新于2024-07-27 收藏 1.91MB PDF 举报

IEEE 802.3u标准，也称为100Base-T标准，是信息技术领域的一个重要里程碑，它属于以太网（Ethernet）系列标准中的一个分支。该标准最初发布于1995年，由美国电气与电子工程师学会（IEEE）制定，主要目的是为了提升局域网（LAN）的数据传输速度，从早期的10Mbps提升到100Mbps，这对于当时的网络通信具有革命性的影响。 100Base-T标准特别针对使用双绞线（Twisted Pair Cables）作为传输介质的情况进行了优化，这种技术允许数据在普通的电话线或五类（Cat5）以太网电缆上以更快的速度传输。它采用了全双工模式，即数据可以在两个方向同时进行，显著提高了数据交换的效率。然而，值得注意的是，这段提供的信息指出该标准已被后续版本取代，可能意味着它已经过时或者不再被广泛采用。对于任何实际应用来说，查阅IEEE Standards Status report（在线可访问：http://standards.ieee.org/db/status/）是非常重要的，以确保使用的是最新、最有效且得到官方认可的标准。尽管如此，作为历史文档，IEEE 802.3u标准仍然具有研究价值，因为它揭示了以太网技术的发展历程，以及标准制定过程中的重要决策。它不仅对当时的网络设计者和工程师有着深远影响，也为我们理解网络技术的演进提供了宝贵的参考。在版权方面，标准的使用受到限制，仅限于清华大学图书馆，并且下载日期为2012年9月21日。任何未经授权的复制或电子检索都必须得到IEEE的书面许可。此外，该标准被国际标准化组织（ISO）认可为美国国家标准（ANSI），反映了其在国际上的权威地位。 IEEE 802.3u标准是网络通信发展史上的一个重要章节，尽管已不再是推荐使用的最新标准，但它对于了解早期高速以太网技术，尤其是100Base-T技术的实现原理和技术规范，依然具有不可替代的价值。

29. System considerations for multi-segment 100BASE-T networks ...................................................... 281

29.1 Overview ................................................................................................................................. 281

29.1.1 Single collision domain multi-segment networks ................................................... 282

29.1.2 Repeater usage ........................................................................................................ 283

29.2 Transmission System Model 1 ................................................................................................ 283

29.3 Transmission System Model 2 ................................................................................................ 283

29.3.1 Round-trip collision delay ....................................................................................... 285

30. Layer Management for 10 Mb/s and 100 Mb/s .................................................................................. 289

30.1 Overview ................................................................................................................................. 289

30.1.1 Scope ....................................................................................................................... 290

30.1.2 Relationship to objects in IEEE Std 802.1F-1993 .................................................. 290

30.1.3 Systems management overview .............................................................................. 290

30.1.4 Management model ................................................................................................. 291

30.2 Managed objects ..................................................................................................................... 292

30.2.1 Introduction ............................................................................................................. 292

30.2.2 Overview of managed objects ................................................................................. 292

30.2.3 Containment ............................................................................................................ 295

30.2.4 Naming .................................................................................................................... 296

30.2.5 Capabilities ............................................................................................................. 296

30.3 Layer management for 10 Mb/s and 100 Mb/s DTEs ............................................................. 302

30.3.1 MAC entity managed object class .......................................................................... 302

30.3.2 PHY entity managed object class ........................................................................... 309

30.4 Layer management for 10 Mb/s and 100 Mb/s baseband repeaters ........................................ 312

30.4.1 Repeater managed object class ............................................................................... 312

30.4.2 Group managed object class ................................................................................... 316

30.4.3 Repeater port managed object class ........................................................................ 317

30.5 Layer management for 10 Mb/s and 100 Mb/s MAUs ........................................................... 322

30.5.1 MAU managed object class .................................................................................... 322

30.6 Management for link Auto-Negotiation .................................................................................. 326

30.6.1 Auto-Negotiation managed object class ................................................................. 326

ANNEXES

22A (informative) MII output delay, setup, and hold time budget .......................................................... 331

22B (informative) MII driver ac characteristics ....................................................................................... 334

22C (informative) Measurement techniques for MII signal timing characteristics ................................. 336

23A (normative) 6T code words ............................................................................................................ 338

23B (informative) Noise budget .............................................................................................................. 340

23C (informative) Use of cabling systems with a nominal differential characteristic

impedance of 120

Ω

.................................................................................................... 341

27A (normative) Repeater delay consistency requirements .................................................................. 342

28A (normative) Selector Field definitions ........................................................................................... 343

CLAUSE PAGE

Authorized licensed use limited to: Tsinghua University Library. Downloaded on September 21,2012 at 14:33:26 UTC from IEEE Xplore. Restrictions apply.

This is an Archive IEEE Standard. It has been superseded by a later version of this standard.

IEEE Standards for Local and Metropolitan Area Networks:

Supplement to Carrier Sense Multiple Access with Collision

Detection (CSMA/CD) Access Method and Physical Layer

Speciﬁcations

Revisions to ISO/IEC 8802-3 : 1993 [ANSI/IEEE Std 802.3,

1993 Edition]

EDITORIAL NOTES

1—The following changes to ISO/IEC 8802-3 : 1993 [ANSI/IEEE Std 802.3, 1993 Edition] (and supplements 802.3j-

1993, 802.3k-1992, 802.3l-1992, and 802.3p&q-1993) affect clauses 1, 2, 4, 5, 14, 19, 20, Annex A, and Annex D. These

changes must also be applied to the 1995 edition of ISO/IEC 8802-3, which will incorporate all the supplements.

2—The text as shown includes editorial changes that accommodate recent changes to the IEEE style.

3—Editing instructions are shown in

bold italic

type. Where modiﬁcations are made to paragraphs of existing text, dele-

tions are shown in strik

ethrough type and additions are underscored. Editorial notes will not be carried over into future

editions.

Replace ﬁgure 1-1 with the following:

PRESENTATION

APPLICATION

SESSION

TRANSPORT

NETWORK

DATA LINK

PHYSICAL

OSI

REFERENCE

MODEL

LAYERS

LAN

CSMA/CD

LAYERS

*AUI

**MII

MDI

HIGHER LAYERS

1 Mb/s, 10 Mb/s

AUI = ATTACHMENT UNIT INTERFACE

MDI = MEDIUM DEPENDENT INTERFACE

MII = MEDIA INDEPENDENT INTERFACE

PLS = PHYSICAL LAYER SIGNALING

PCS = PHYSICAL CODING SUBLAYER

* AUI is optional for 10 Mb/s systems and is not specified for 1 Mb/s and 100 Mb/s systems.

** MII is optional for 10 Mb/s DTEs and for 100 Mb/s systems and is not specified for 1 Mb/s systems.

NOTE—The three types of layers below the MAC sublayer are mutually independent.

PMA = PHYSICAL MEDIUM ATTACHMENT

PHY

MAU

MAU = MEDIUM ATTACHMENT UNIT

PHY = PHYSICAL LAYER DEVICE

*AUI

MDI

**MII

MDI

PMD = PHYSICAL MEDIUM DEPENDENT

*** PMD is specified for 100BASE-X only; 100BASE-T4 does not use this layer.

100 Mb/s

10 Mb/s

For an exposed AUI residing below an MII, see 22.5.

MEDIUM

LLC—LOGICAL LINK CONTROL

MAC—MEDIA ACCESS CONTROL

PMA

PLS

PMA

RECONCILIATION

PMA

PCS

***PMD

RECONCILIATION

PLS

Figure 1-1—LAN standard relationship to the ISO Opens Systems Interconnection

(OSI) reference model

Authorized licensed use limited to: Tsinghua University Library. Downloaded on September 21,2012 at 14:33:26 UTC from IEEE Xplore. Restrictions apply.

This is an Archive IEEE Standard. It has been superseded by a later version of this standard.

IEEE

Std 802.3u-1995 SUPPLEMENT TO 802.3:

Change 1.1.1 to read as follows:

The Carrier Sense Multiple Access with Collision Detection (CSMA/CD) media access method is the means

by which two or more stations share a common transmission medium. To transmit, a station waits (defers)

for a quiet period on the medium (that is, no other station is transmitting) and then sends the intended mes-

sage in bit-serial form. If, after initiating a transmission, the message collides with that of another station,

then each transmitting station intentionally sends a few additional bytes transmits for an additional pre-

deﬁned period to ensure propagation of the collision throughout the system. The station remains silent for a

random amount of time (backoff) before attempting to transmit again. Each aspect of this access method

process is speciﬁed in detail in subsequent sections of this standard.

This is a comprehensive standard for Local Area Networks employing CSMA/CD as the access method.

This standard is intended to encompass several media types and techniques for signal rates of from 1 Mb/s to

20 Mb/s 100 Mb/s. This edition of the standard provides the necessary speciﬁcations for 10 Mb/s baseband

and broadband systems, a 1 Mb/s baseband system, and a Repeater Unit. three families of systems: a 1 Mb/s

baseband system, 10 Mb/s baseband and broadband systems, and a 100 Mb/s baseband system.

Change 1.1.2.2 to read as follows:

Two Three important compatibility interfaces are deﬁned within what is architecturally the Physical Layer.

Medium Dependent Interfaces (MDI).

To communicate in a compatible manner, all stations shall

adhere rigidly to the exact speciﬁcation of physical media signals deﬁned in Section clause 8 (and

beyond) in this standard, and to the procedures that deﬁne correct behavior of a station. The

medium-independent aspects of the LLC sublayer and the MAC sublayer should not be taken as

detracting from this point; communication by way of the ISO/IEC 8802-3 [ANSI/IEEE Std 802.3]

Local Area Network requires complete compatibility at the Physical Medium interface (that is, the

coaxial physical cable interface).

Attachment Unit Interface (AUI).

It is anticipated that most DTEs will be located some distance from

their connection to the coaxial physical cable. A small amount of circuitry will exist in the Medium

Attachment Unit (MAU) directly adjacent to the coaxial physical cable, while the majority of the

hardware and all of the software will be placed within the DTE. The AUI is deﬁned as a second com-

patibility interface. While conformance with this interface is not strictly necessary to ensure commu-

nication, it is highly recommended, since it allows maximum ﬂexibility in intermixing MAUs and

DTEs. The AUI may be optional or not speciﬁed for some implementations of this standard that are

expected to be connected directly to the medium and so do not use a separate MAU or its intercon-

necting AUI cable. The PLS and PMA are then part of a single unit, and no explicit AUI implemen-

tation is required.

Media Independent Interface (MII).

It is anticipated that some DTEs will be connected to a remote

PHY, and/or to different medium dependent PHYs. The MII is deﬁned as a third compatibility inter-

face. While conformance with implementation of this interface is not strictly necessary to ensure

communication, it is highly recommended, since it allows maximum ﬂexibility in intermixing PHYs

and DTEs. The MII is optional.

1.3 References

Replace 1.3 with the following:

The following standards contain provisions which, through references in this text, constitute provisions of

this International Standard. At the time of publication, the editions indicated were valid. All standards are

subject to revision, and parties to agreements based on this International Standard are encouraged to investi-

gate the possibility of applying the most recent editions of the standards listed below. Members of IEC and

ISO maintain registers of currently valid International Standards.

Authorized licensed use limited to: Tsinghua University Library. Downloaded on September 21,2012 at 14:33:26 UTC from IEEE Xplore. Restrictions apply.

This is an Archive IEEE Standard. It has been superseded by a later version of this standard.

IEEE

CSMA/CD Std 802.3u-1995

EDITORIAL NOTE—In the following references, changes are not indicated by strikethroughs and underscores.

ANSI X3.237-1995, Rev 2.1 (1 January 1995), FDDI Low-Cost Fibre Physical Layer—Medium Dependent

(LCF-PMD) (ISO/IEC CD 9314-9).

ANSI X3.263: 1995, Revision 2.2 (1 March 1995), FDDI Twisted Pair—Physical Medium Dependent (TP-

PMD) (ISO/IEC CD 9314-10).

CISPR 22: 1993, Limits and Methods of Measurement of Radio Interference Characteristics of Information

Technology Equipment.

IEC 60, High-voltage test techniques.

IEC 68, Basic environmental testing procedures.

IEC 96-1: 1986, Radio-frequency cables, Part 1: General requirements and measurement methods, and

Amendment 2: 1993.

IEC 169-8: 1978 and -16: 1982, Radio-frequency connectors, Part 8: Radio-frequency coaxial connectors

with inner diameter of outer conductor 6.5 mm (0.256 in) with bayonet lock—Characteristic impedence

50 ohms (Type BNC) and Part 16: Radio-frequency coaxial connectors with inner diameter of outer conduc-

tor 7 mm (0.276 in) with screw coupling—Characteristic impedence 50 ohms (75 ohms) (Type N).

IEC 380: 1985, Safety of electrically energized ofﬁce machines.

IEC 435: 1983, Safety of data processing equipment.

IEC 603-7: 1990, Connectors for frequencies below 3 MHz for use with printed boards, Part 7: Detail speci-

ﬁcation for connectors, 8-way, including ﬁxed and free connectors with common mating features.

IEC 793-1: 1992, Optical ﬁbres, Part 1: Generic speciﬁcation.

IEC 793-2: 1989, Optical ﬁbres, Part 2: Product speciﬁcations.

IEC 794-1: 1993, Optical ﬁbre cables, Part 1: Generic speciﬁcation.

IEC 794-2: 1989, Optical ﬁbre cables, Part 2: Product speciﬁcations.

IEC 807-2: 1992, Rectangular connectors for frequencies below 3 MHz, Part 2: Detail speciﬁcation for a

range of connectors with assessed quality, with trapezoidal shaped metal shells and round contacts—Fixed

solder contact types.

IEC 825-1: 1993, Safety of laser products, Part 1: Equipment classiﬁcation, requirements and user’s guide.

CISPR documents are available from the International Electrotechnical Commission, 3 rue de Varembé, Case Postale 131, CH 1211,

Genève 20, Switzerland/Suisse. CISPR documents are also available in the United States from the Sales Department, American

National Standards Institute, 11 West 42nd Street, 13th Floor, New York, NY 10036, USA.

IEC publications are available from International Electrotechnical Commission. IEC publications are also available in the United

States from the American National Standards Institute.

IEC 380: 1985 was withdrawn in 1991. It has been replaced by IEC 950: 1991.

IEC 435: 1983 was withdrawn in 1991. It has been replaced by IEC 950: 1991.

Subclause 9.9 is to be read with the understanding that the following changes to IEC 793-2: 1989 have been requested: a) Correction of

the numerical aperture tolerance in table III to ±0.015; and b) Addition of another bandwidth category of 150 MHz referred to 1 km, for

the type A1b ﬁbre in table III.

Authorized licensed use limited to: Tsinghua University Library. Downloaded on September 21,2012 at 14:33:26 UTC from IEEE Xplore. Restrictions apply.

This is an Archive IEEE Standard. It has been superseded by a later version of this standard.

剩余414页未读，继续阅读

polaris1122

粉丝: 1
资源: 4

IEEE 802.3u标准历史文档：1995年版本

802.3英文版（2015版）（6部分）

802.3-2012标准高清PDF带书签

IEEE 802.3标准全文下载

IEEE802.3和IEEE802.3bp区别

什么是IEEE 802.3ah EFM技术，它与传统IEEE 802.3标准有何不同？

简述IEEE 802.11a、IEEE 802.11b和IEEE 802.11i

深入解析IEEE 802.3ah EFM技术与传统IEEE 802.3标准的差异及其应用场景。

请阐述IEEE 802.3ah EFM技术的工作原理及其与传统IEEE 802.3标准的主要区别。

ieee802.3 最新版本资源

IEEE802.3bt

最新资源