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1、IEEE P802.11n/D2.00, February 2007 Copyright 2007 IEEE. All rights reserved.i This is an unapproved IEEE Standards Draft, subject to change. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56
2、57 58 59 60 61 62 63 64 65 IEEE P802.11n/D2.00 Draft 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) specification
3、s: Amendment : Enhancements for Higher Throughput EDITORIAL NOTEthe amendment number will be inserted by IEEE-SA editorial staff in the publication preparation phase. The editing instructions are shown in bold italic. Four editing instructions are used: change, delete, insert, and replace. Change is
4、 used to make corrections in existing text or tables. The editing instruction specifies the location of the change and describes what is being changed by using strikethrough (to remove old mate- rial) and underscore (to add new material). Delete removes existing material. Insert adds new material wi
5、th- out disturbing the existing material. Insertions may require renumbering. If so, renumbering instructions are given in the editing instruction. Replace is used to make changes in figures or equations by removing the existing figure or equation and replacing it with a new one. Editorial notes wil
6、l not be carried over into future editions because the changes will be incorporated into the base standard. Authorized licensed use limited to: National Taiwan University. Downloaded on November 11, 2008 at 02:56 from IEEE Xplore. Restrictions apply. IEEE P802.11n/D2.00, February 2007 Copyright 2007
7、 IEEE. All rights reserved.ii This is an unapproved IEEE Standards Draft, subject to change. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 Editorial Notes EDITO
8、RIAL NOTETwo 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. E
9、ditorial Comments are marked (Ed: ), and contain references to submissions or comment resolutions to track the origin of changes. EDITORIAL NOTEHeadings with empty content or Headings preceding editing instructions that modify the contents of the referenced subclause are there to provide context to
10、the reader of this document, they have no other significance. EDITORIAL NOTEEquations are confined to Clause 20, and are shown in the form “20-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. ED
11、ITORIAL NOTEExcept 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 NOTECross references are generally shown like this: “20.3.11.1 (Implicit feedback be
12、amforming)” or “Figure n64 (Transmitter block diagram for the greenfield format packet and HT portion of the mixed format packet except HT signal field)”. 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
13、 removal of the additional text is achieved automatically by updating the cross-reference styles in the FrameMaker document. EDITORIAL NOTEThe 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 tabl
14、e 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 NOTELine numbering is only approximate. This is a
15、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
16、unavoidable behavior. EDITORIAL NOTENew 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 it
17、s own editorial instruction. The instruction intentionally does not include where to insert the subclause because that is determined uniquely by the subclause number. EDITORIAL NOTEPronunciation. It is assumed that while reading the spec aloud, a reader will read “HT” as “ aitch tee “ (which slightl
18、y 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
19、 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. Authorized licensed use limited to: National Taiwan University. Downloaded on November 11, 2008 at 02:56 from IEEE Xplore. Restrictions app
20、ly. IEEE P802.11n/D2.00, February 2007 Copyright 2007 IEEE. All rights reserved.iii This is an unapproved IEEE Standards Draft, subject to change. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54
21、55 56 57 58 59 60 61 62 63 64 65 IEEE P802.11n/D2.00 Draft 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) specifi
22、cations: Amendment : Enhancements for Higher Throughput EDITORIAL NOTEthe 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 Copyright 2007 the IEEE. Three Park Avenue New York, NY 10016-5997, USA
23、 All rights reserved. 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 f
24、or 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 Inte
25、llectual 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
26、, Standards Intellectual Property 445 Hoes Lane, P.O. Box 1331 Piscataway, NJ 08854, USA Authorized licensed use limited to: National Taiwan University. Downloaded on November 11, 2008 at 02:56 from IEEE Xplore. Restrictions apply. IEEE P802.11n/D2.00, February 2007 ivCopyright 2007 IEEE. All rights
27、 reserved. This is an unapproved IEEE Standards Draft, subject to change. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 Abstract: This amendment defines modific
28、ations to both the 802.11 physical layers (PHY) and the 802.11 Medium Access Control Layer (MAC) so that modes of operation can be enabled that are capable of much higher throughputs, with a maximum throughput of at least 100Mb/s, as measured at the MAC data service access point (SAP). Keywords: Wir
29、eless LAN, Medium Access Control, Physical Layer, Radio, Multiple Input Multiple Out- put, MIMO, MIMO-OFDM, High Throughput Authorized licensed use limited to: National Taiwan University. Downloaded on November 11, 2008 at 02:56 from IEEE Xplore. Restrictions apply. IEEE P802.11n/D2.00, February 200
30、7 Copyright 2007 IEEE. All rights reserved.v This is an unapproved IEEE Standards Draft, subject to change. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 Introd
31、uction 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 D9.0 IEEE P802.11k D7.0 IEEE P802.11r D4.1 IEEE P802.11p D2.0 Notice to users Errata Errata, if any, for this and
32、 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/i
33、eee/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 th
34、erewith. 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 a
35、pplicant 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 o
36、f 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/D2.00, Draft Amendment to Standard for Information Technology-Telecommunica
37、tions 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.) Authorized licensed use limited to: National Taiwan University. Downloa
38、ded on November 11, 2008 at 02:56 from IEEE Xplore. Restrictions apply. IEEE P802.11n/D2.00, February 2007 viCopyright 2007 IEEE. All rights reserved. This is an unapproved IEEE Standards Draft, subject to change. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
39、 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 Participants At the time this draft Standard was completed, the 802.11 Working Group had the following membership: Stuart J. Kerry, Chair Al Petrick and Harry Worstell, Vice-chairs Tim Godfrey, Secret
40、ary EDITORIAL NOTEa three column list of voting members of 802.11 on the day the draft was sent for sponsor ballot will be inserted The following were officers of Task Group n: Bruce Kraemer, Chair Sheung Li, Vice-Chair Garth Hillman, Secretary Adrian P. Stephens, Technical Editor The following memb
41、ers of the balloting committee voted on this Standard. Balloters may have voted for approval, disapproval, or abstention. EDITORIAL NOTEa three-column list of responding sponsor ballot members will be inserted by IEEE staff Authorized licensed use limited to: National Taiwan University. Downloaded o
42、n November 11, 2008 at 02:56 from IEEE Xplore. Restrictions apply. IEEE P802.11n/D2.00, February 2007 Copyright 2007 IEEE. All rights reserved.vii This is an unapproved IEEE Standards Draft, subject to change. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33
43、34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 Table of Contents 3.Definitions . 1 4.Abbreviations and acronyms . 6 5.General description 8 5.2.8HT STA 8 6.MAC service definition . 8 6.1 Overview of MAC services . 8 6.1.2Security services 8 6.1.5MAC d
44、ata service architecture 9 7.Frame formats 11 7.1 MAC frame formats. 11 7.1.1Conventions. 11 7.1.2General frame format. 11 7.1.3Frame fields . 12 7.1.3.1Frame control field. 12 7.1.3.1.2Type and Subtype fields 12 7.1.3.1.4More Fragments field. 13 7.1.3.1.8More Data field 13 7.1.3.1.10Order field 13
45、7.1.3.2Duration/ID field 13 7.1.3.3Address fields 13 7.1.3.3.4DA field . 13 7.1.3.3.5SA field 13 7.1.3.4.1Sequence Number field 14 7.1.3.4.2Fragment Number field 14 7.1.3.5QoS Control field. 14 7.1.3.5.1TID subfield. 15 7.1.3.5.3Ack Policy subfield 16 7.1.3.5.5Queue Size subfield. 16 7.1.3.5.6TXOP D
46、uration Requested subfield 17 7.1.3.5.7AP PS Buffer State subfield. 17 7.1.3.5aHT Control field. 17 7.1.3.6Frame Body field. 20 7.1.4Duration/ID field in data and management frames 21 7.2 Format of individual frame types. 22 7.2.1Control frames . 22 7.2.1.1RTS frame format 22 7.2.1.2CTS frame format
47、 22 7.2.1.7Block Ack Request (BlockAckReq) frame format 23 7.2.1.7.1Basic BlockAckReq variant. 24 7.2.1.7.2Compressed BlockAckReq variant 25 7.2.1.7.3Multi-TID BlockAckReq variant. 25 7.2.1.8Block Ack (BlockAck) frame format 27 7.2.1.8.1Basic BlockAck variant. 28 7.2.1.8.2Compressed BlockAck variant
48、 29 Authorized licensed use limited to: National Taiwan University. Downloaded on November 11, 2008 at 02:56 from IEEE Xplore. Restrictions apply. IEEE P802.11n/D2.00, February 2007 viiiCopyright 2007 IEEE. All rights reserved. This is an unapproved IEEE Standards Draft, subject to change. 1 2 3 4 5
49、 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 7.2.1.8.3Multi-TID BlockAck variant. 30 7.2.1.9Control Wrapper frame . 31 7.2.2Data frames 31 7.2.2.1Aggregate MSDU format (A-MSDU). 32 7.2.3Management frames. 34 7.2.3.1Beacon frame format . 34 7.2.3.4Association Request frame format. 34 7.2.3.5Association Response frame format 34 7.2.3.6Reassociation Request frame format . 35 7.2.3.7Reassociation Response frame form