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Interference Cancellation Method under Overlapping Basic Service Set

A basic service set and interference elimination technology, which is applied in the field of interference elimination under overlapping basic service sets, can solve problems such as data collisions, low system utilization, and small monitoring range of nodes, and achieve the effect of improving reliability

Active Publication Date: 2018-05-15
XIDIAN UNIV
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in a distributed environment, the system cannot perform centralized scheduling. Dynamic adjustment of the free channel assessment CCA threshold is a solution to the interference between BSSs. If the free channel assessment CCA threshold is small, the monitoring range of the node will be too large, and the data cannot be sent normally, which will cause waste of system resources; if the free channel assessment CCA threshold is large, the current monitoring range of the node will be too large. Small, causing data sent by other nodes to collide, affecting resource utilization

Method used

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  • Interference Cancellation Method under Overlapping Basic Service Set
  • Interference Cancellation Method under Overlapping Basic Service Set

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Embodiment Construction

[0048] The present invention will be described in detail below with reference to the accompanying drawings.

[0049] refer to figure 1 , the scene used in the present invention is a scene of mutual interference between two access points AP in a dense wireless local area network WLAN environment, which includes two access points AP1, AP2 and two stations STA1, STA2. The station associated with the first access point AP1 is the first station STA1, and the station associated with the second access point AP2 is the second station STA2. The two access points AP1 and AP2 interfere with each other. The positions of the stations STA1 and STA2 are uncertain, and may be in any position within the respective basic service set BSS areas.

[0050] refer to figure 2 , the implementation steps of the present invention are as follows:

[0051] Step 1: Enhance the existing BSS Color mechanism.

[0052] In the existing BSS Color mechanism, the BSS Color information is divided into the BSS...

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Abstract

The invention discloses an interference elimination method under an overlapping basic service set. The method is characterized in that an existing BSS Color mechanism is enhanced; when a neighbor access point and an associated site communicate, a current access point determines whether a current channel is busy or idle through idle channel assessment; if the channel is idle, the current access point sends data; if the channel is busy, the current access point acquires BSS Color information of data sent by the neighbor access point and the associated site, and the BSS Color information of data sent by the current access point to the associated site is combined to determine whether the current access point sends data to the associated site; and if nodes are determined not to be in the corresponding overlapping basic service set according to the correlation BSS Color information acquired by the current access point, the current access point sends the data to the associated site and the interference under the overlapping basic service set is eliminated. A resource utilization rate is increased and the method can be used in a densely-deployed wireless local area network environment.

Description

technical field [0001] The invention belongs to the technical field of communication, relates to a method for eliminating interference under overlapping basic service sets, and can be used for improving the IEEE 802.11 protocol. Background technique [0002] The full name of the IEEE 802.11 protocol is the Institute of Electrical and Electronics Engineers 802.11 protocol, which is a standard developed by the International Institute of Electrical and Electronics Engineers IEEE for wireless local area networks (WLANs). The development and formulation of the IEEE 802.11 protocol provides technical and compatibility guarantees for the rapid development of WLAN. In order to better manage WLAN, IEEE802.11 protocol proposes a BSS Color mechanism. The existing BSS Color is an identification mechanism used to distinguish different basic service set BSSs. Enhancing the existing BSS Color mechanism can solve the problem of reduced system resource utilization due to mutual interferenc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J11/00H04W16/10
CPCH04J11/0056H04W16/10
Inventor 侯蓉晖崔雪巍李建东李红艳
Owner XIDIAN UNIV
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