Wireless network scheduling method based on serial interference cancellation and power control

Abstract

The invention discloses a wireless network scheduling method based on serial interference cancellation and power control, and mainly solves the traditional problem of low overall frequency spectrum utilization rate based on a serial interference cancellation scheduling algorithm. According to the technical scheme of the wireless network scheduling method, 1, a center node in a network receives first data packages Pkt-1 of all nodes and establishes a network topology and a conflict graph corresponding to the network topology, 2, the center node adjusts sending node transmission power so that receiving end can simultaneously receives a plurality of useful signals by utilizing a serial interference cancellation technology, and 3, the center node updates the conflict graph, the principle that the link path with the minimum satisfaction degree is preferentially scheduled is adopted to traverse the updated conflict graph, thus to find a link path set capable of performing transmission at the same time slot as the link path, and notify the corresponding nodes to perform data transmission on corresponding link paths. The wireless network scheduling method improves the frequency spectrum utilization rate and guarantees equitable distribution of a network resource at the same time, and the wireless network scheduling method can be used for resource distribution of a wireless network.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and mainly relates to a wireless network scheduling method, which can be used for resource allocation of the wireless network. Background technique [0002] In a wireless network, due to the broadcast characteristics of wireless channels, wireless links working on the same channel will interfere with each other. When the interference in the network is not effectively controlled, it will cause transmission interruption, network congestion, and ultimately lead to a significant drop in network spectrum utilization. Mutual interference between signals can be avoided by allocating different network resources, such as time, space, and frequency band resources, to different signals. [0003] Most of the existing wireless network scheduling algorithms are based on the interference avoidance mechanism, that is, the impact of interference on link performance is considered in the scheduling ...

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Problems solved by technology

[0005] However, since the transmission power of each sending node in the above method is fixed during the scheduling process, the transmission signal power cannot be actively adjusted to meet the serial interference cancellation conditions. Therefore, the receiving node can only passively perform interference cancellation and signal reception, it is difficult to further improve the spectrum utilization of the network

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