Method for managing spectrum resources in D2D communications

Abstract

The invention relates to the field of wireless mobile communications, and provides a method for managing spectrum resources in D2D communications. The method specifically comprises the steps that in the same cell, a plurality of pairs of D2D users use the spectrum resources which are orthorhombic to spectrum resources used by cellular users for communications; the disturbance variable of same frequency interference which is borne mutually by every two pairs of D2D users in the communication process is obtained; the communication outage probability of each pair of D2D users when same frequency interference happens is calculated; clustering of the D2D users is achieved according to the communication outage probability and the disturbance variable, a plurality of mutually-orthorhombic spectrum resources in the spectrum resources used by the pairs of the D2D users are distributed to each cluster, and all the D2D user pairs in each cluster reuse the same spectrum resource. By means of the method for managing the spectrum resources in the D2D communications, low interference multiplex of the pairs of the D2D users to the same spectrum resource in the same cell in the D2D communications can be achieved.

Description

technical field [0001] The invention relates to the field of wireless mobile communication, and provides a spectrum resource management method in D2D communication. Background technique [0002] With the emergence of various new wireless services, people's demand for communication rate is getting higher and higher, but the spectrum resources that can be applied to wireless communication are very limited, and it is necessary to provide a high enough data communication rate in the limited spectrum resources to meet the needs of users. Therefore, it is very important to improve spectrum utilization. D2D (Device-to-Device, device-device) communication is a technology applied in a cellular network to perform direct short-distance communication by multiplexing cellular cell spectrum resources under the control of the system. Applying D2D technology to cellular networks can effectively increase local network throughput and improve spectrum utilization. However, when cellular spec...

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Problems solved by technology

[0004] However, most of the currently used spectrum resource management solutions are aimed at the one-to-one D2D transmission mode, that is, one spectrum resource is only used by one D2D user pair, and the spectrum resources used by different user pairs are orthogonal to each other.

This transmission mode has great limitations when the number of D2D users is large, because the one-to-one form causes the number of spectrum resources to directly determine the number of users

On the other hand, the current solution mainly considers the interference between cellular and D2D users. If multiple D2D user pairs reuse the same spectrum resource, it will generate a lot of co-channel interference, especially when the number of users is large. A lot of co-channel interference will make it difficult to guarantee the transmission quality

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