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Method and apparatus for protecting high throughput stations

A technology with high throughput and modulation scheme, which is applied in the direction of data exchange network, access restriction, wireless communication, etc., and can solve problems such as inability to decode packets

Inactive Publication Date: 2009-08-19
INTERDIGITAL TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, a receiver of a first type HT STA may not be able to decode packets transmitted by a second type HT STA, and vice versa

Method used

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  • Method and apparatus for protecting high throughput stations
  • Method and apparatus for protecting high throughput stations
  • Method and apparatus for protecting high throughput stations

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Experimental program
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Embodiment

[0033] 1. A high throughput (HT) transmission method implemented in a wireless communication system comprising a first type station (STA) and a second type STA, the method comprising:

[0034] the first STA transmits at least one HT physical layer (PHY) packet data unit (PPDU), the PPDU includes an HT preamble and an HT PHY payload, the HT preamble includes information related to the HT PHY payload;

[0035] the second STA receives the PPDU from the first STA; and

[0036] The second STA extracts information related to the HT PHY payload from the HT preamble, even if the HT PHY payload cannot be decoded.

[0037] 2. The method of embodiment 1, wherein the HT PPDU transmitted by the first STA includes a legacy PHY preamble, the method further comprising:

[0038] The second STA sets a Network Allocation Vector (NAV) timer for the transmission based on information included in the legacy PHY preamble.

[0039] 3. The method of one of embodiments 1 and 2, wherein the HT PPDU tra...

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PUM

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Abstract

A method and apparatus for protecting high throughput (HT) stations (STAs) are disclosed. In one embodiment, a physical layer (PHY) legacy preamble transmitted by one STA is decoded by another STA that does not use a legacy preamble. In another embodiment, one STA is identified by another STA by using bits in the preamble of a packet to indicate which PHY type will be used in the remaining portion of the packet. In yet another embodiment, one STA sends ready-to-send (RTS) / clear-to-send (CTS) or CTS-to-self messages for reserving a medium in the presence of another STA of a different type than the one STA. In yet another embodiment, an access point (AP) transmits a beacon or an association message including a capability information element (IE) that indicates operation or support for a legacy preamble, HT STA preambles and a medium access control (MAC) packet transmission with HT protection mechanisms.

Description

[0001] This application is a divisional application with an application date of March 13, 2008 and an application number of 200680033681.5. technical field [0002] The present invention relates to wireless communication systems. More particularly, the present invention relates to the protection of HT transports in the presence of otherwise incompatible High Throughput (HT) transports as well as legacy transports. Background technique [0003] HT transmissions require protection from legacy stations (STAs) because legacy STAs using contention cannot decode HT physical layer (PHY) packet data units (PPDUs), so legacy STAs cannot interpret the medium because they are busy. Similarly, a given HT STA's HT transmissions require protection from other HT STAs in case of HT PHY incompatibilities. In "802.11 Wireless Network: The Definitive Guide, Second Edition" (802.11 Wireless Network: The Definitive Guide, Second Edition)" written by Matthew Gast, the enhanced protection mechani...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/06H04L12/56H04W72/12H04W88/10H04W88/14H04L45/28H04W74/08H04W48/08H04W80/02
CPCH04L1/0079H04W92/02H04W16/14H04W74/08H04L1/0631H04W88/02H04W88/08H04L1/0612
Inventor 亚蒂·钱德拉爱尔戴德·M·莱尔约瑟·S·李维史蒂芬·E·泰利苏希尔·A·格兰帝
Owner INTERDIGITAL TECH CORP