D2D-based wireless cache network system throughput optimization method

Abstract

The invention discloses a D2D-based wireless cache network system throughput optimization method. The method comprises the steps of establishing a system throughput optimization model of a wireless cache network under a constraint condition; decomposing the throughput optimization model of the wireless cache network system into an access selection and distribution model and a power control model;providing access service and channel allocation for the D2D request user according to the access selection and allocation model; judging and maintaining the feasibility of power control of the channelallocated by the D2D user; in response to power control feasibility, converting the power control model into a DC plan and a solution to the DC plan is solved, and performing throughput optimizationbased on the solution to the DC plan. According to the method provided by the invention, the system throughput of the D2D wireless cache network is effectively improved, the lowest transmitting powerselection is provided for the D2D user, the reuse rate of the frequency spectrum of the cellular user is greatly improved, and a better solution is provided for the application of the D2D-based wireless cache network system.

Description

technical field [0001] The invention belongs to the field of content sharing and resource allocation in a wireless caching network; in particular, it relates to a system throughput optimization method in a D2D-based wireless caching network. Background technique [0002] As a very promising technology, the D2D-based wireless cache network can effectively reduce the backhaul link load of the base station and the user's service delay by deploying the content in the network in the cache near the D2D user; By reusing spectrum resources of cellular users, D2D communication can effectively improve spectrum utilization and system throughput. However, if the mutual interference between cellular users and D2D users caused by spectrum reuse cannot be effectively dealt with, the advantages of the D2D-based wireless caching network cannot be fully utilized. Although many important technical achievements have been developed in the resource allocation algorithm in the current wireless ca...

AI Technical Summary

Problems solved by technology

However, if the mutual interference between cellular users and D2D users caused by spectrum reuse cannot be effectively dealt with, the advantages of the D2D-based wireless caching network will not be fully utilized.

Although many important technical achievements have been developed in the resource allocation algorithm in the current wireless caching network, most studies only consider the multiplexing of a single cellular user spectrum resource by a single D2D user, and do not consider the impact of multiple D2D user access on resource allocation.

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