User clustering and resource distribution method in D2D multicast scene

Abstract

The invention relates to the field of communication, and specifically relates to a user clustering and resource distribution method in a D2D multicast scene. The method comprises the steps that S1, each mobile terminal uploads data information to a base station after measurement; S2, the base station selects a proper cluster head for a content requesting user according to the data information uploaded by each mobile terminal, and forms an optimal D2D multicast cluster; S3, the base station transmits the clustering information to the content requesting user; S4, resources are distributed to the formed D2D multicast cluster, and a cellular user who meets the requirements of a cellular user and D2D multicast cluster QoS at the same time and generates the minimum interference with the D2D multicast cluster; S5, each mobile terminal carries out the data transmission after receiving the clustering and resource distribution information. The method can improve the service experience of an edge user, reduces the load of the base station, improves the transmission efficiency, reduces the interference, caused by the multiplexing of the frequency spectrum resources of the cellular user, with the D2D multicast cluster, and improves the utilization rate of resources.

Description

technical field [0001] The present invention relates to the communication field, in particular to a user clustering and resource allocation method in a D2D multicast scenario. Background technique [0002] The popularity of the Internet and the rapid development of communication technology have promoted the prosperity of local shared data services. When a large number of users request the same data transmission, data forwarding through the base station will undoubtedly increase the load of the base station, resulting in low utilization of system resources, excessive transmission delay, and reduced reliability. The multicast technology proposed in the LTE system can reduce resource waste to a great extent and relieve network pressure. When some users have the same content needs, the same data can be obtained through the base station multicast service. However, in the traditional base station-based multicast transmission, due to the different distribution locations of users,...

AI Technical Summary

Problems solved by technology

[0005] In summary, the existing technical solutions have the following disadvantages: the performance of D2D multicast clusters is not considered from the perspective of energy efficiency; clustering or resource allocation is only performed from a single aspect, and different D2D multicast cluster structures and different resources are not considered comprehensively Effect of Allocation Scheme on D2D Multicast Cluster Performance

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