D2D distributed power optimization method in cellular network

A power-optimized, distributed technology applied in the field of communication

Active Publication Date: 2016-07-27
SOUTHEAST UNIV
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  • D2D distributed power optimization method in cellular network
  • D2D distributed power optimization method in cellular network
  • D2D distributed power optimization method in cellular network

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[0034] The present invention will be further explained below in conjunction with the accompanying drawings.

[0035]The communication rate optimization problem of D2D users based on cellular network is a complex non-convex nonlinear optimization problem. The present invention aims at the joint power allocation problem of D2D and base station in cellular network, and the proposed distributed algorithm can be applied to cellular users with and Power limit, independent power limit, D2D user has and power limit, independent power limit and cellular user has QoS limit, etc., fast distributed optimization of the transmit power p of the base station 0 and D2D user transmit power p -0 . The transmission power obtained by adopting the algorithm proposed by the present invention can maximize the communication rate of all D2D users on all cellular frequency bands under the condition of ensuring the communication rate of cellular users. The present invention will be further described be...

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Abstract

The invention discloses a D2D distributed power optimization method in a cellular network. The transmission power of a base station and a D2D user is solved in a distributed manner through fixed point iteration, so that the power distribution and communication rate of a D2D device and the base station on different channels are obtained. According to the invention, a non-convex problem is approximated as a divisible convex optimization problem by using a convex approximation method and an optimal solution of the convex problem is obtained through multi-layer iteration rapid convergence. The method provided by the invention is wide in application range, realizes frequency spectrum resource sharing, improves system performance flexibly, reduces computation amount and improves computation speed.

Description

technical field [0001] The invention belongs to the communication field, and in particular relates to a D2D distributed power optimization method in a cellular network. Background technique [0002] The D2D communication based on the cellular network is a technology that directly uses the resources of the cellular network to realize communication between adjacent users without switching through the base station. D2D technology is expected to reduce base station load, improve coverage, reduce energy efficiency, and improve cellular spectrum utilization. Numerous studies have shown that D2D communication based on cellular networks can provide better and more direct wireless services in local areas. D2D technology has bright application prospects. For example, in a large-scale concert, the organizer provides related resource download services for the audience through a remote server. Due to too many download requests at the same time, it is easy to cause network congestion. I...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W52/26H04W52/34
CPCH04W52/265H04W52/267H04W52/346
Inventor 王家恒官伟史锋峰赵春明
Owner SOUTHEAST UNIV
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