IEEE802.11n无线网络标准资源-CSDN文库

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IEEE 802.11n无线网络标准是信息技术领域中一项重要的技术规范，它显著提升了无线局域网（WLAN）的传输速度与效率，为高速数据传输提供了强有力的支持。这一标准由IEEE（电气与电子工程师协会）的802.11工作组制定，作为对原有802.11标准的修订版，旨在提供更高吞吐量的增强功能。 ### 标准概述 IEEE 802.11n标准是在2006年提出的草案版本，尽管文档中提到这是一个未经批准的草案，可能仍会有所变动，但其核心理念和技术框架已经成型并被广泛采纳。这一标准的核心目标是通过一系列技术改进，如MIMO（多输入多输出）天线技术、更宽的频道带宽、更高的调制编码方案等，来大幅提升无线网络的数据传输速率，从而满足日益增长的高带宽需求。 ### 技术要点 1. **MIMO技术**：802.11n最显著的特征之一是引入了MIMO技术。MIMO允许同时通过多个空间路径传输数据，大大增加了数据传输的并行性和容量。这种技术不仅提高了传输速度，还增强了信号的稳定性和抗干扰能力。 2. **更宽的频道带宽**：相比之前的802.11g标准，802.11n支持更宽的频道带宽（最高可达40MHz），这使得在相同的频率下能够承载更多的数据。 3. **高级调制编码**：802.11n采用了更高效的调制编码技术，如64-QAM（正交幅度调制），这比传统的QPSK或16-QAM提供了更高的数据传输率。 4. **信道绑定**：为了实现40MHz的带宽，802.11n引入了信道绑定技术，即将两个相邻的20MHz信道绑定在一起，形成一个更宽的频段，从而支持更高的数据传输速率。 5. **帧聚合**：802.11n还支持帧聚合，即在网络层将多个数据包合并成一个大的数据包进行传输，减少了因头部信息而产生的开销，提高了传输效率。 6. **空间流的数量**：802.11n定义了最多四条空间流，这意味着在理想条件下，可以实现高达600Mbps的理论最大传输速率。 ### 实际应用与影响 IEEE 802.11n标准的实施，极大地推动了无线网络技术的发展，使得高清视频流、在线游戏、远程教育等高带宽需求的应用成为可能。此外，由于其对信号稳定性的改善，802.11n也促进了无线网络覆盖范围的扩大，增强了无线设备间的互操作性。 IEEE 802.11n无线网络标准通过引入多项创新技术，显著提升了无线网络的性能，满足了现代信息化社会对高速、稳定的无线连接的需求，对信息技术领域产生了深远的影响。

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IEEE

P802.11n/D1.04 September 2006

This is an unapproved IEEE Standards Draft, subject to change.

IEEE P802.11n™/D1.04

Draft Amendment to STANDARD for

Information Technology-

Telecommunications and information exchange

between systems-

Local and metropolitan area networks-

Specific requirements-

Part 11: Wireless LAN Medium Access Control

(MAC) and Physical Layer (PHY) specifications:

Amendment <number>: Enhancements for Higher

Throughput

EDITORIAL NOTE—the amendment number will be inserted by IEEE-SA editorial staff during

preparation for publication.

Prepared by the 802.11 Working Group of the 802 Committee

Three Park Avenue

New York, NY 10016-5997, USA

This document is an unapproved draft of a proposed IEEE Standard. As such, this document is subject to

change. USE AT YOUR OWN RISK! Because this is an unapproved draft, this document must not be uti-

lized for any conformance/compliance purposes. Permission is hereby granted for IEEE Standards commit-

tee participants to reproduce this document for purposes of international standardization consideration. Prior

to adoption of this document, in whole or in part, by another standards development organization permission

must first be obtained from the Manager, Standards Intellectual Property, IEEE Standards Activities Depart-

ment. Other entities seeking permission to reproduce this document, in whole or in part, must obtain permis-

sion from the Manager, Standards Intellectual Property, IEEE Standards Activities Department.

IEEE Standards Activities Department

Manager, Standards Intellectual Property

445 Hoes Lane,

P.O. Box 1331

Piscataway, NJ 08854, USA

IEEE

P802.11n/D1.04 September 2006

iii

This is an unapproved IEEE Standards Draft, subject to change.

Introduction

IEEE draft amendment P802.11n

This amendment specifies enhancements to the following draft standard and draft amendments, in order to

obtain higher throughput:

— IEEE P802.11 REV-ma D8.0

— IEEE P802.11k D4.0

— IEEE P802.11r D2.1

— IEEE P802.11p D1.0

Notice to users

Errata

Errata, if any, for this and all other standards can be accessed at the following URL:

http://standards.ieee.org/reading/ieee/updates/errata/index.html. Users are encouraged to check this URL for

errata periodically.

Interpretations

Current interpretations can be accessed at the following URL:

http://standards.ieee.org/reading/ieee/interp/index.html.

Patents

Attention is called to the possibility that implementation of this standard may require use of subject matter

covered by patent rights. By publication of this standard, no position is taken with respect to the existence or

validity of any patent rights in connection therewith. The IEEE shall not be responsible for identifying pat-

ents or patent applications for which a license may be required to implement an IEEE standard or for con-

ducting inquiries into the legal validity or scope of those patents that are brought to its attention. A patent

holder or patent applicant has filed a statement of assurance that it will grant licenses under these rights

without compensation or under reasonable rates and nondiscriminatory, reasonable terms and conditions to

applicants desiring to obtain such licenses. The IEEE makes no representation as to the reasonableness of

rates, terms, and conditions of the license agreements offered by patent holders or patent applicants. Further

information may be obtained from the IEEE Standards Department.

(This introduction is not part of IEEE P802.11n/D1.04, Draft Amendment to Standard for Information

Technology-Telecommunications and information exchange between systems-Local and Metropolitan

networks-Specific requirements-Part 11: Wireless LAN Medium Access Control (MAC) and Physical

Layer (PHY) specifications: Enhancements for Higher Throughput.)

IEEE

P802.11n/D1.04 September 2006

This is an unapproved IEEE Standards Draft, subject to change.

Editorial Notes

EDITORIAL NOTE—Two forms of editorial markup are used: Notes and Comments. Editorial Notes

and Editorial Comments are not part of the amendment and will be removed before it is published,

together with any other contents in this subclause. This paragraph is an example of how an Editorial

Note is marked. Editorial Comments are marked (Ed: ), and contain references to submissions or

comment resolutions to track the origin of changes.

EDITORIAL NOTE—Headings with empty content or Headings preceding editing instructions that

modify the contents of the referenced subclause are there to provide context to the reader of this

document, they have no other significance.

EDITORIAL NOTE—Equations are confined to clause 21, and are shown in the form “21-m” where m

is an integer. This is a valid form of numbering according to the IEEE-SA Style Guide. This usage will be

reconsidered prior to sponsor ballot.

EDITORIAL NOTE—Except when referring to tables and figures that exist in the baseline, figure and

table numbers are preceded by “n” and are assigned sequentially. This will be changed prior to sponsor

ballot.

EDITORIAL NOTE—Cross references are generally shown like this: “21.3.11.1 (Implicit feedback

beamforming)” or “Figure n51 (Transmitter block diagram)”. The title in parenthesis is there to aid in

the review of this document and will be removed before a subsequent ballot or before publication. The

removal of the additional text is achieved automatically by updating the cross-reference styles in the

FrameMaker document.

EDITORIAL NOTE—The default IEEE-SA style for tables is to “float”. This means that they be

repositioned later, usually at the head of the next page, to avoid splitting the table and reduce the amount

of blank space. The table can appear to move out of the subclause it is referenced first from, and can even

split a paragraph. This is the intended IEEE-SA behavior, please do not report it as a defect in the draft.

EDITORIAL NOTE—Line numbering is only approximate. This is a limitation of the FrameMaker tool.

Whitespace between paragraphs is part of the IEEE-SA style, as defined in their templates. The

combination of these two facts leads to the appearance of blank lines in the draft between every

paragraph. Please do not report this as an editorial defect as it is the unavoidable behavior.

EDITORIAL NOTE—New subclauses are generally introduced by an editorial instruction “insert the

following new subclause”. New subclause headings are generally introduced by an editorial instruction

“insert the following new subclause heading”. Each new heading or subclause has its own editorial

instruction. The instruction intentionally does not include where to insert the subclause because that is

determined uniquely by the subclause number.

EDITORIAL NOTE—Pronunciation. It is assumed that while reading the spec aloud, a reader will read

“HT” as “ ‘aitch tee “ (which slightly more stress on the initial syllable) rather than read it as “high

throughput”. This determines the spelling of the indefinite article to be “an” rather than “a”. The

attention of readers is also drawn to Footnote 1 (As presented in Document 11-04-1097-r0 and approved

and minuted at the Berlin 2004 802.11 interim meeting, the standardized pronunciation of MIMO is ‘mie-

mow.), and are encourage to emit only compliant vocalizations of this and related terms.

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