Method for controlling sub-channel cca, sending device and receiving device

A sub-channel and retransmission technology, which is applied in the field of controlling sub-channel idle channel evaluation, can solve the problem of large power consumption and achieve the effect of reducing power consumption

Inactive Publication Date: 2011-12-14
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The embodiment of the present invention provides a method for controlling sub-channel CCA, a sending device, and a receiving device, so as to solve the problem of large power consumption in the prior art and reduce power consumption

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  • Method for controlling sub-channel cca, sending device and receiving device
  • Method for controlling sub-channel cca, sending device and receiving device
  • Method for controlling sub-channel cca, sending device and receiving device

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Embodiment Construction

[0033] In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of the embodiments of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0034] figure 1 It is a schematic diagram of the method flow of an embodiment of a method for controlling a secondary channel CCA according to the present invention, including:

[0035] Step 11: The receiving end receives the corresponding RTS frame sent by the sending end before transmitting the data, performs CCA measurement on the se...

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Abstract

The invention provides a method, transmitting equipment and receiving equipment for controlling sub-channel CCA (Clear Channel Assessment). The method comprises the following steps of: receiving a corresponding RTS (Ready To Send) frame which is transmitted by a transmitting terminal before data are transmitted, carrying out CCA measurement on a sub-channel and transmitting a CTS (Clear To Send) frame to the transmitting terminal on a main channel, wherein the CTS frame is a response to the RTS frame; determining transmission bandwidth after receiving the CTS frame on the transmitting terminal; and receiving the transmitting terminal data transmitted on the transmission bandwidth, and stopping the CCA measurement on the sub-channel after finishing the data transmission. According to the embodiment of the invention, power consumption can be reduced.

Description

Technical field [0001] The present invention relates to wireless communication technology, and in particular to a method for controlling a secondary channel clear channel assessment (Clear Channel Assessment, CCA), a sending device and a receiving device. Background technique [0002] In a wireless local area network (WLAN), in order to avoid transmission conflicts, a CCA module can be used to detect whether the channel is idle. However, in some cases, the transmission of all other devices cannot be detected. For example, when the station (Station, STA)1 is outside the coverage of STA2, STA1 cannot detect STA2. At this time, STA1 is a hidden node, which may interfere Transmission to STA2. [0003] In order to avoid the problem of hidden nodes, a Request to Send (RTS) / Clear to Send (Clear to Send) mechanism can be used. In this mechanism, after the sending device detects that the medium is idle, it sends an RTS frame. The RTS frame contains One Network Allocation Vector (NAV) peri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W28/20H04W52/02
CPCY02B60/50Y02D30/70
Inventor 李云波朱胡飞李靖
Owner HUAWEI TECH CO LTD
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