Wireless Mesh network MAC layer bandwidth request and allocation method based on IEEE802.16d standard

Abstract

The invention relates to a request and distribution method of MAC bandwidth of wireless Mesh network based on standard of IEEE802.16d. Based on MAC standard, the invention is combined with some queue scheduling algorithms to make bandwidth request and distribution strategy with QoS guarantee under the mode of Mesh. The strategy preferentially treats real-time business request, reserves bandwidth, and guarantees time delay of the real-time business. Simultaneously, size and step-length of the reserved bandwidth are dynamically adjusted according to non-real time business request queue length, and equity of service is enhanced. Simultaneously, the request and distribution method of the invention realizes that different applications are provided with different levels of QoS guarantee to a certain extent, and higher bandwidth availability ratio can still be achieved.

Description

technical field [0001] The invention relates to a method for requesting and allocating bandwidth of a MAC layer of a wireless Mesh network based on the IEEE802.16d standard, and belongs to the field of wireless Mesh network communication. Background technique [0002] The design of the MAC protocol is one of the key technologies in the Mesh network. The quality of the MAC protocol directly affects the quality of performance indicators such as network throughput and delay. However, the specific QoS scheduling algorithm is not clearly specified in the standard, which is the current Research hotspots. [0003] The MAC layer of the IEEE802.16 standard mainly solves the channel resource sharing among competing multiple users through scheduling. Although the standard defines the scheduling mechanism in Mesh mode in detail, it does not clearly stipulate the allocation method of data channels under various scheduling mechanisms. . [0004] At this stage, there is also research on ...

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Problems solved by technology

[0004] At this stage, there is also research on priority-based packet scheduling algorithms. The algorithm judges network congestion through two checkpoints and changes the scheduling method of non-real-time services. However, due to the randomness of network services, it only judges network traffic through fixed checkpoints. The state is not very reasonable. In addition, although the algorithm reduces the delay of real-time services to a certain extent, it increases the packet loss rate of non-real-time services and lacks fairness.

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