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Cooperative transmission method and device in wireless local area network

A technology of wireless local area network and cooperative transmission, which is applied in the field of communication and can solve problems such as mutual influence of data transmission

Active Publication Date: 2017-08-11
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The present invention provides a method and device for cooperative transmission in a wireless local area network, to at least solve the problem of mutual influence between OBSSs due to data transmission between stations in the related art

Method used

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  • Cooperative transmission method and device in wireless local area network
  • Cooperative transmission method and device in wireless local area network
  • Cooperative transmission method and device in wireless local area network

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0116] Such as image 3 As shown, there are two BSSs in the network, and the APs of the two BSSs are AP1 and AP2 respectively. STA1 and AP1 belong to the same BSS, and STA2 and AP2 belong to the same BSS. AP1 and AP2 establish the CoMP group. The identification of the multi-point coordination group can be distinguished by saving the attribution identification of the basic service set or generating the identification of the basic coordination group. This embodiment describes saving the basic service set attribution identifier, AP1 sends the basic service set attribution identifier (such as BSS color=1) to AP2, and AP2 also sends the BSS attribution identifier of the BSS (such as BSS color=2) Send to AP1. AP1 and AP2 save the attribution identifier of the basic service set that constitutes the basic service set by themselves.

[0117] The communication protocol negotiated by AP1 and AP2 is not limited to the wireless local area network technology, and the CoMP group can be e...

Embodiment 2

[0125] AP1 and multiple APs (such as AP2, AP4) form a coordinated multi-point group. During the establishment of the coordinated multi-point group, AP1, AP2, and AP4 notify each other of the basic service set attribution identifier. This implementation uses BSS color to distinguish, such as Figure 10 as shown, Figure 10 is a schematic diagram of multi-BSS coordinated multi-point according to an optional embodiment of the present invention.

[0126] STA1 and AP1 belong to the same BSS. AP1 successfully received the physical layer preamble (Preamble) of STA1, and analyzed that the site has enabled the multi-point coordination function. Through the BSS color carried in the physical layer preamble, AP1 knows that the subsequent data is sent to itself. , then if AP1 can correctly receive the subsequent data part, then AP1 does not need to wait for the data forwarded by other APs, if AP1 cannot correctly receive the subsequent data part, it will wait for other forwarded data withi...

Embodiment 3

[0132] AP1, AP2, and AP4 establish a coordinated multi-point group, and AP1 sends the basic service set identifier (such as BSS color) to AP2 and AP4, such as Figure 10 shown.

[0133] During the association process, STA1 and AP1 conduct capability negotiation for Coordinated Multi-point, and STA1 learns about the combination mode and / or response mode supported by AP1. Or notify by means of broadcast (beacon, beacon).

[0134] STA1 and AP1 belong to the same BSS. STA1 indicates in the transmitted wireless frame that the coordinated multi-point function is enabled, and indicates the information combination method. The information combination method includes forwarding the original signal. The receiving AP only forwards the correct signal, and the receiving AP first forwards the received signal. For status forwarding, etc., the supported information merging methods are not limited to the situations described above, and other information merging methods can also be indicated. ...

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Abstract

The invention provides a cooperative transmission method and device in a wireless local area network. The method comprises the following steps: receiving first data from a site by a first access point, wherein the first data carry information used for indicating to open a multi-point collaboration function, and the site and the first access point belong to a same basic service set; receiving second data forwarded by a second access point by the first access point, wherein the second access point and the first access point belong to a same multi-point cooperation group, and the second data are from the basic service set that the first access point belongs to; and judging the first data and the second data by the first access point, and transmitting a confirmation message to the site for indicating that the first data are correctly received according to a judging result. The cooperative transmission method in the wireless local area network provided by the invention solves the problem in the prior art that the data transmission between the sites between OBSSs (Overlapping Basic Service Set) is influenced by each other, thereby achieving the effect of improving the correctness of the data transmission

Description

technical field [0001] The present invention relates to the communication field, in particular to a method and device for cooperative transmission in a wireless local area network. Background technique [0002] At present, with the explosive application of WLAN networks, the deployment of WLAN networks is becoming more and more intensive, and the network load is also increasing. With the increase of networks, the overlapping of network coverage is also more serious, and the efficiency of WLAN networks will be significantly reduced. Simply increasing the rate cannot solve this problem. Therefore, the IEEE standard organization has set up a related task group dedicated to solving the problem of WLAN network efficiency. Among them, solving the problem of collision and aggravated interference in dense deployment scenarios has attracted extensive attention and research. [0003] figure 1 is a schematic diagram of the basic structure of a wireless frame in related technologies, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L5/00H04L1/16H04L1/06
CPCH04L1/0675H04L1/1692H04L5/0035H04L5/0055H04W84/12H04L5/00
Inventor 韩志强侯蓉晖王祖袖吕开颖孙波李楠
Owner ZTE CORP
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