Resource distribution method for supporting full-duplex D2D communication in cellular network

Abstract

The invention requests for protecting a resource distribution method based on full-duplex D2D communication in a cellular network. Full-duplex (FD) D2D (Device-to-device) communication is introduced in the cellular network; therefore, the burden of a base station can be reduced; the energy consumption of a terminal can be reduced; the cell coverage range can be enlarged; but, resource sharing of D2D users and cellular users brings about a certain same-frequency interference to a system; mutual interference can be reduced through reasonable resource distribution; a resource distribution algorithm having the maximum weight matching is provided in the invention; on the premise that the service quality requirements of the cellular users are ensured through the algorithm, the lowest requirements of D2D link communication can also be ensured through the algorithm; the resource distribution relationship of the cellular users and the D2D users in the system is equivalent to the vertex matching relationship in a graph theory; wireless resources are reasonably distributed between D2D user pairs and the cellular users by utilizing the maximum weight matching algorithm in the graph theory; interference between the cellular users and the D2D users can be effectively reduced; the relatively good fairness can be obtained; and simultaneously, the throughput capacity of the system is maximized.

Description

Technical field [0001] The invention belongs to the field of mobile communication technology, and particularly relates to resource allocation supporting full-duplex short-distance direct communication technology in a cellular network. Background technique [0002] With the rapid development of fourth-generation mobile communication technology, more and more communication terminal access requirements have made spectrum resources increasingly scarce. In order to solve the increasingly scarce wireless spectrum resources, and at the same time to make more reasonable use of wireless spectrum resources, there is an urgent need for a new resource utilization method, which can more flexibly and efficiently utilize precious wireless spectrum resources full-duplex D2D (Device- to-Device) communication technology came into being. D2D communication makes the resource allocation of hybrid networks different from traditional cellular networks. At this time, D2D users share cellular resources....

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Problems solved by technology

(References: Ali, S. Rajatheva, N. Latva-aho, M. Fullduplexdevice-to-devicecommunicationincellularnetworks[C].IEEENetworksandCommunications(EuCNC), 2014European Conference on Bologna.2014:1-5.) This scheme is effective compared to half-duplex The system throughput is improved, and the spectrum utilization rate is improved. However, the system only considers the scenario where a pair of D2D users and one cellular user exist, and does not consider the situation where multiple pairs of D2D users share resources with multiple cellular users. The actual environment is very different

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