Method for channel allocation in D2D (device to device) communications with unlicensed spectrum and WiFi coexisting
An unlicensed frequency band and channel allocation technology, applied in wireless communication, wireless communication services, electrical components, etc., can solve problems such as non-standardization, difficulty in channel reuse, and reduced WiFi system performance, and achieve the effect of improving performance
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[0069] In order to improve the system capacity and ensure the fair coexistence of D2D-U and WiFi, the embodiment of the present invention proposes a cluster-based distributed channel selection mechanism:
[0070] 1) Cluster selection channel. The D2D-U devices are clustered based on the distance. After the clusters are formed, the working channels in the clusters are dynamically adjusted according to the spectrum environment around the clusters: the idle unlicensed spectrum resources can be fully utilized, and the interference with WiFi can also be reduced. , as much as possible to improve communication performance, to achieve a win-win situation.
[0071] 2) The cluster heads compete for the channel. After the working channel in each cluster is selected, the cluster head will use the LBT (Listen Before Talk, Listen Before Talk) mechanism to compete for channel access on behalf of the cluster. After the channel competition is successful, the D2D-U devices in the cluster will ...
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