IEEE 802.3br™-2016：TSN Ethernet Amendment for Express Traffic Interleaving

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IEEE Std 802.3br™-2016 是 IEEE 对 Ethernet 标准的一次重大修订，它作为 IEEE 802.3™-2015 标准的补充，旨在解决工业控制和实时通信领域对高性能、低延迟以太网（称为 Time-Sensitive Networking, TSN）的需求。该标准是 LAN/MAN 标准委员会赞助的，由 IEEE 计算机协会制定，于2016年6月30日获得批准。该标准的核心内容是定义了在标准以太网环境中如何有效地管理和服务时间敏感的 Express 交通，也就是那些对传输延迟和带宽有严格要求的实时应用，例如工业自动化、远程医疗和自动驾驶等。802.3br引入了新的机制，如优先级队列（Priority Queuing, PQ）、流量整形（Traffic Shaping）、流量控制（Flow Control）和错误检测与恢复（Error Detection and Recovery），以确保这些关键业务的可靠传输。 IEEE 802.3br标准特别关注服务质量（Quality of Service, QoS）的实现，它允许在网络中为不同类型的流量分配不同的服务级别，确保关键数据包能够在拥挤的网络环境中优先发送，减少数据丢失和延迟。此外，它还规定了管理参数，如时间敏感服务标识符（TSID）和时间敏感优先级字段（TS Priority Field），以便网络设备能够识别和区分时间敏感流量。值得注意的是，802.3br标准是在 IEEE 802.3bw™-2015, IEEE 802.3by™-2016, IEEE 802.3bq™-2016 和 IEEE 802.3bp™-2016 等先前标准的基础上进行扩展和演进的，它们共同构建了 TSNA（Time-Sensitive Networking for Automation）生态系统，为工业物联网（IIoT）和其他实时通信应用提供了强大的基础设施。下载该标准时，需注意版权限制，仅限于指定的用户——United Arab Emirates University，并且只能通过 IEEE Xplore 获取，可能存在特定的使用规定。 IEEE Std 802.3br™-2016 是现代工业网络中的重要里程碑，它通过标准化和优化以太网在时间敏感通信中的行为，为实时和关键业务提供了一个可靠且可管理的平台，对于推动工业4.0和智能制造的发展具有深远影响。

When the IEEE-SA Standards Board approved this standard on 30 June 2016, it had the following

membership:

Jean-Philippe Faure, Chair

Ted Burse, Vice Chair

John D. Kulick, Past Chair

Konstantinos Karachalios, Secretary

*Member Emeritus

Chuck Adams

Masayuki Ariyoshi

Stephen Dukes

Jianbin Fan

Ronald W. Hotchkiss

J. Travis Griffith

Gary Hoffman

Michael Janezic

Joseph L. Koepfinger*

Hung Ling

Kevin Lu

Gary Robinson

Annette D. Reilly

Mehmet Ulema

Yingli Wen

Howard Wolfman

Don Wright

Yu Yuan

Daidi Zhong

Authorized licensed use limited to: United Arab Emirates University. Downloaded on April 22,2017 at 05:02:34 UTC from IEEE Xplore. Restrictions apply.

Introduction

IEEE Std 802.3 was first published in 1985. Since the initial publication, many projects have added

functionality or provided maintenance updates to the specifications and text included in the standard. Each

IEEE 802.3 project/amendment is identified with a suffix (e.g., IEEE Std 802.3ba™-2010).

The half-duplex Media Access Control (MAC) protocol specified in IEEE Std 802.3-1985 is Carrier Sense

Multiple Access with Collision Detection (CSMA/CD). This MAC protocol was key to the experimental

Ethernet developed at Xerox Palo Alto Research Center, which had a 2.94 Mb/s data rate. Ethernet at

10 Mb/s was jointly released as a public specification by Digital Equipment Corporation (DEC), Intel, and

Xerox in 1980. Ethernet at 10 Mb/s was approved as an IEEE standard by the IEEE Standards Board in 1983

and subsequently published in 1985 as IEEE Std 802.3-1985. Since 1985, new media options, new speeds of

operation, and new capabilities have been added to IEEE Std 802.3. A full duplex MAC protocol was added

in 1997.

Some of the major additions to IEEE Std 802.3 are identified in the marketplace with their project number.

This is most common for projects adding higher speeds of operation or new protocols. For example,

IEEE Std 802.3u™ added 100 Mb/s operation (also called Fast Ethernet), IEEE Std 802.3z™ added 1000 Mb/

operation (also called Gigabit Ethernet), IEEE Std 802.3ae

™

added 10 Gb/s operation (also called

10 Gigabit Ethernet), IEEE Std 802.3ah™ specified access network Ethernet (also called Ethernet in the

First Mile), and IEEE Std 802.3ba added 40 Gb/s operation (also called 40 Gigabit Ethernet) and 100 Gb/s

operation (also called 100 Gigabit Ethernet). These major additions are all now included in and are

superseded by IEEE Std 802.3-2015 and are not maintained as separate documents.

At the date of IEEE Std 802.3br-2016 publication, IEEE Std 802.3 is composed of the following documents:

IEEE Std 802.3-2015

Section One—Includes Clause 1 through Clause 20 and Annex A through Annex H and Annex 4A.

Section One includes the specifications for 10 Mb/s operation and the MAC, frame formats, and

service interfaces used for all speeds of operation.

Section Two—Includes Clause 21 through Clause 33 and Annex 22A through Annex 33E. Section

Two includes management attributes for multiple protocols and speed of operation as well as

specifications for providing power over twisted-pair cabling for multiple operational speeds. It also

includes general information on 100 Mb/s operation as well as most of the 100 Mb/s Physical Layer

specifications.

Section Three—Includes Clause 34 through Clause 43 and Annex 36A through Annex 43C. Section

Three includes general information on 1000 Mb/s operation as well as most of the 1000 Mb/s Physical

Layer specifications.

Section Four—Includes Clause 44 through Clause 55 and Annex 44A through Annex 55B. Section

Four includes general information on 10 Gb/s operation as well as most of the 10 Gb/s Physical Layer

specifications.

Section Five—Includes Clause 56 through Clause 77 and Annex 57A through Annex 76A. Clause 56

through Clause 67 and Clause 75 through Clause 77, as well as associated annexes, specify subscriber

access and other Physical Layers and sublayers for operation from 512 kb/s to 10 Gb/s, and defines

This introduction is not part of IEEE Std 802.3br™-2016, IEEE Standard for Ethernet—Amendment 5: Specification

and Management Parameters for Interspersing Express Traffic.

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services and protocol elements that enable the exchange of IEEE 802.3 format frames between stations

in a subscriber access network. Clause 68 specifies a 10 Gb/s Physical Layer specification. Clause 69

through Clause 74 and associated annexes specify Ethernet operation over electrical backplanes at

speeds of 1000 Mb/s and 10 Gb/s.

Section Six—Includes Clause 78 through Clause 95 and Annex 83A through Annex 93C. Clause 78

specifies Energy-Efficient Ethernet. Clause 79 specifies IEEE 802.3 Organizationally Specific Link

Layer Discovery Protocol (LLDP) type, length, and value (TLV) information elements. Clause 80

through Clause 95 and associated annexes include general information on 40 Gb/s and 100 Gb/s

operation as well the 40 Gb/s and 100 Gb/s Physical Layer specifications. Clause 90 specifies Ethernet

support for time synchronization protocols.

IEEE Std 802.3bw-2015

Amendment 1—This amendment includes changes to IEEE Std 802.3-2015 and adds Clause 96. This

amendment adds 100 Mb/s Physical Layer (PHY) specifications and management parameters for

operation on a single balanced twisted-pair copper cable.

IEEE Std 802.3by-2016

Amendment 2—This amendment includes changes to IEEE Std 802.3-2015 and adds Clause 105

through Clause 112, Annex 109A, Annex 109B, Annex 109C, Annex 110A, Annex 110B, and

Annex 110C. This amendment adds MAC parameters, Physical Layers, and management parameters

for the transfer of IEEE 802.3 format frames at 25 Gb/s.

IEEE Std 802.3bq-2016

Amendment 3—This amendment includes changes to IEEE Std 802.3-2015 and adds Clause 113 and

Annex 113A. This amendment adds new Physical Layers for 25 Gb/s and 40 Gb/s operation over

balanced twisted-pair structured cabling systems.

IEEE Std 802.3bp-2016

Amendment 4—This amendment includes changes to IEEE Std 802.3-2015 and adds Clause 97 and

Clause 98. This amendment adds point-to-point 1 Gb/s Physical Layer (PHY) specifications and

management parameters for operation on a single balanced twisted-pair copper cable in automotive and

other applications not utilizing the structured wiring plant.

IEEE Std 802.3br-2016

Amendment 5—This amendment includes changes to IEEE Std 802.3-2015 and adds Clause 99. This

amendment adds a MAC Merge sublayer and a MAC Merge Service Interface to support for

Interspersing Express Traffic over a single link.

A companion document IEEE Std 802.3.1 describes Ethernet management information base (MIB) modules

for use with the Simple Network Management Protocol (SNMP). IEEE Std 802.3.1 is updated to add

management capability for enhancements to IEEE Std 802.3 after approval of the enhancements.

IEEE Std 802.3 will continue to evolve. New Ethernet capabilities are anticipated to be added within the

next few years as amendments to this standard.

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