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Uniform WLAN multi-AP physical layer methods

A technology of layer information and sectors, applied in diversity/multi-antenna systems, space transmit diversity, radio transmission systems, etc., can solve problems such as inefficient use of available network resources, non-support, and limited network coverage

Inactive Publication Date: 2015-08-26
INTERDIGITAL PATENT HLDG INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current IEEE 802.11 specification does not support this type of operation
STA cannot associate with more than one AP at a time also limits network coverage
These limitations result in an inefficient use of the network's available resources

Method used

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  • Uniform WLAN multi-AP physical layer methods
  • Uniform WLAN multi-AP physical layer methods
  • Uniform WLAN multi-AP physical layer methods

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0233] CLAIMS 1. A method used in an access point (AP), the method comprising: enabling multi-access point (multi-AP) transmission.

[0234] 2. The method according to embodiment 1, further comprising:

[0235] Coordinate multi-AP transmissions.

[0236] 3. The method according to embodiment 1, further comprising:

[0237] Control multi-AP transmission.

[0238] 4. The method as in any preceding embodiment, wherein control of the multi-AP transmission is from a central wireless local area network (WLAN) controller.

[0239] 5. The method as in any preceding embodiment, wherein said coordination of multi-AP transmissions is from a central WLAN controller.

[0240] 6. The method as in any preceding embodiment, wherein cyclic shift diversity (CSD) is applied to short training fields (STF) transmitted from multiple APs by using a WLAN controller.

[0241] 7. The method as in any preceding embodiment, wherein a different cyclic phase delay is applied for each AP to transmit the...

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PUM

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Abstract

A method and apparatus are disclosed for training and feedback in sectorized transmissions. An IEEE 802.11 station may receive a Sector Training Announcement frame from an AP. The station may then receive a plurality of Training frames from the AP, wherein each of the plurality of Training frames is separated by a short interframe space (SIFS) and each of the plurality of Training frames is received using a different sectorized antenna pattern. The station may generate a Sector Feedback frame indicating a sector based on the plurality of Training frames. The station may send the Sector Feedback frame to the AP. The Sector Feedback frame may indicate a desire to enroll in sectorized transmissions. Alternatively, the Sector Feedback frame may indicate a desire to change sectors.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Application No. 61 / 719,081, filed October 26, 2012, and US Provisional Application No. 61 / 751,503, filed January 11, 2013, the contents of which are incorporated herein by reference. Background technique [0003] Allowing simultaneous transmission from multiple access points (APs) to a station (STA) can improve network coverage and throughput. However, the current IEEE 802.11 specification does not support this type of operation. The inability of a STA to associate with more than one AP at a time also limits network coverage. These limitations result in an inefficient use of the network's available resources. Since IEEE 802.11 does not support simultaneous transmission from more than one AP to a single STA, a method of enabling this operation is needed to facilitate better network coverage for STAs. Contents of the invention [0004] Methods and apparatus for tra...

Claims

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Application Information

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IPC IPC(8): H04B7/04H04B7/06H04B7/08
CPCH04B7/061H04B7/0491H04B7/088H04B7/0695H04B7/0619H04W88/08
Inventor P·夏O·奥特莱H·刘M·高希R·L·奥勒森N·B·沙阿
Owner INTERDIGITAL PATENT HLDG INC
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