Channel allocation method and network system

Abstract

The invention discloses a channel allocation method and network system. The network system comprises at least one access point and a plurality of stations which are in intercommunication connection. The stations carry out data communication with the access point according to a communication period. Each communication period comprises a channel contention phase and a data transmission phase. The method comprises the steps that the plurality of stations needing to transmit data carry out channel contention and the access point adds the stations having a channel occupation condition to a contention queue; when the channel contention phase terminates, the access point sends a beacon frame which is used for notifying that the channel contention phase terminates and the data transmission phase starts to the plurality of stations; and the plurality of stations carry out data transmission with the access point in sequence according to a queue sequence of the contention queue until the contention queue is empty. The channel contention and data transmission are decoupled into two phases and each phase is managed by a corresponding management and control mechanism, so a utilization rate of channels and the throughput of the whole system are improved, and the data business transmission quality of each station is guaranteed.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular, to a channel allocation method and a network system. Background technique [0002] With continuous development of WLANs (Wireless Local Area Networks, wireless local area networks), WLANs are widely used in various fields. At present, IEEE802.11 series standards are mainstream standards of WLAN systems, and the MAC (Medium Access Control, Media Access Control) layer is one of the focuses of its research. [0003] In the current IEEE802.11 series standards, channel sharing is mainly implemented through the 802.11DCF (Distributed Coordination Function, distributed coordination function) mechanism. A BEB (Binary Exponential Back off, Binary Exponential Back off) algorithm is usually used to avoid site collisions. [0004] In the 802.11DCF mechanism, when a station has data to send, the station first listens to the channel, if the channel is idle, then continue...

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Problems solved by technology

[0005] It can be seen that in the 802.11DCF mechanism, the channel utilization rate is very low, especially when the network state tends to be saturated, the channel collision of the DCF mechanism under high-density network conditions will increase sharply, and the high collision rate will lead to a significant increase in system throughput. decline, abnormal performance and increased delay, it is difficult to guarantee the quality of data service transmission at each site

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