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A method for avoiding space division interference of wireless local area network obss stations

A technology of wireless local area network and space division interference, which is applied in the field of space division interference avoidance of wireless local area network OBSS sites to achieve the effect of improving system throughput

Inactive Publication Date: 2015-09-16
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention is aimed at the scenario proposed above, and aims to solve the problem of how to meet the service quality requirements of the OBSS site in the wireless local area network

Method used

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  • A method for avoiding space division interference of wireless local area network obss stations
  • A method for avoiding space division interference of wireless local area network obss stations
  • A method for avoiding space division interference of wireless local area network obss stations

Examples

Experimental program
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Effect test

Embodiment 1

[0028] The sending station sends an RTS frame to the receiving station for polling to obtain the different available bandwidth of each receiving station, and the sending end of the station at the OBSS can perform polling by slightly modifying the "Enhanced RTS" frame of the traditional RTS frame structure, using The function of this frame is to be compatible with other wireless LAN protocols. New protocols can add this frame to deal with the interference problem of OBSS. Correspondingly, the station at OBSS can use the "Enhanced CTS" frame to respond, and use this frame to respond Because the station at the OBSS can carry the beam vector information used by the station, then in the protection period of the network allocation vector, the interference sender (AP) needs to process after receiving the frame, and use the received beam information of the OBSS station as One of the constraints of precoding is to perform MU-MIMO transmission on the BSS site where it is located, and the...

Embodiment 2

[0030] The sending station sends an RTS frame or a short data frame to the receiving station for polling to obtain different available bandwidth for each receiving station, and the "more data" bit in the "frame control" field in the traditional CTS frame structure is useless , the station at the OBSS can distinguish whether it is in the position of the OBSS through the beacon frames sent by different BSSs at different timings, so the station at the OBSS can set the "frame control" field in the CTS frame structure under the premise of knowing its own position The "more data" bit position is "1", as shown in the attached figure figure 2, so as to inform the sender that within a period of time after the CTS frame (this time can be equal to SIFS, and other values ​​depend on the manufacturer), there is a frame to be sent carrying the beam vector information to be used by the OBSS site, then the network In the protection period of the allocation vector, the interference sender (AP...

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Abstract

The invention discloses a space division interference avoiding method for a wireless local area network OBSS (object-based storage system) site. The method comprises the following steps: step 1, a site at the OBSS is enabled to carry beam vector information used by the site through modifying the structure of an RTS (ready to send) frame and a CTS (clear to send) frame, and an MU-MIMO (multi-user multi-input multi-output) sending mode is realized; and step 2, interference AP (access point) in the MU-MIMO sending mode considers the zero-forcing beam direction as an extra constraint condition in the protection time interval of network allocation vector. The space division interference avoiding method for the wireless local area network OBSS site can effectively satisfy the service quality requirement of the site at the OBSS under scarce spectrum resource.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a method for avoiding space division interference of a wireless local area network OBSS station. Background technique [0002] In a wireless local area network, a base station is also called an access point (AP, access point). Regardless of the number of users, the basic construction of a wireless local area network is not much different in essence. However, due to the introduction of multiple users, many problems follow . The following scenarios illustrate the problems caused by multi-user access to the current WLAN. [0003] Scenario 1: When adjacent BSSs use the same main channel, that is, APs of adjacent BSSs use the same frequency band as the main channel for transmission. If it is assumed that AP1 targets STA1, STA2 and STA3, and AP2 targets STA4, STA5 and STA6, STA3 is an OBSS site (as shown in the attached figure figure 1 shown), then when these stations compete f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W16/14H04W28/24H04W84/12
Inventor 杨绿溪冀保峰瞿培培黄永明胡莹王海荣
Owner SOUTHEAST UNIV
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