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Method and apparatus for determining cp value

A device and a technology for determining units, applied in the field of communication, can solve the problems of excellent robustness, inefficient use of CP, and unoptimized system throughput, and achieve the effect of optimizing system throughput and reducing overhead

Active Publication Date: 2018-09-28
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These issues lead to inefficient use of CP, where robustness trumps efficiency and system throughput is not optimized

Method used

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  • Method and apparatus for determining cp value
  • Method and apparatus for determining cp value
  • Method and apparatus for determining cp value

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Embodiment Construction

[0024] The technical solutions of the embodiments of the present invention are clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Apparently, the described embodiments are only part but not all of the embodiments of the present invention. All other embodiments that can be obtained by those skilled in the art based on the embodiments of the present invention without any creative effort will fall within the protection scope of the present invention.

[0025] figure 1 It is a schematic diagram showing a basic service set (basic service set, BSS). The BSS provides basic components of an 802.11 wireless local area network (local area network, LAN). In infrastructure mode, a single access point (accesspoint, AP) together with all related stations (stations, STAs) is called BSS. The AP acts as a controller to control the stations within the BSS; the simplest BSS consists of an access point and a station. ...

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Abstract

The present application provides a method for determining a CP. A STA performs channel estimation, determines a CP value according to the result of channel estimation, and sends indication informationto an AP, wherein the indication information is used for indicating the CP value, so that the AP may choose a suitable CP according to the indication information. Therefore, overhead may be reduced and system throughput may be optimized.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of communications, and in particular, to a method and device for determining a CP value. Background technique [0002] The main purpose of the cyclic prefix (Cyclic Prefix, CP) is to make Orthogonal Frequency Division Multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) transmission robust against long-delay propagation of physical multipath channels. On the other hand, CP itself is an overhead that reduces system efficiency and reduces the actual data rate. In order to adapt the CP value to specific link conditions and reduce overhead, the latest 802.11n and 802.11ac standards introduce two options for the CP value. However, in many applications, the access point (Access Point, AP) selects the CP according to the average or worst case of all clients, so a client requiring a long CP means that all transmissions are done with the long CP. Another problem related to the d...

Claims

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Application Information

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IPC IPC(8): H04W56/00
CPCH04L27/2646H04L27/2607H04L25/0204
Inventor 根纳季·特所迪克王宁娟于健薛鑫希米·西隆多伦·埃兹里奥德·里德里刘乐林伟
Owner HUAWEI TECH CO LTD