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Fast optimization algorithm of D2D power distribution in case of single-channel cellular users

A cellular user and optimization algorithm technology, applied in the field of D2D communication, can solve the problem of reducing the flexibility of D2D system

Active Publication Date: 2015-12-09
SOUTHEAST UNIV
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Problems solved by technology

[0004] In most of the current research at home and abroad, it is assumed that the same cellular channel can only be shared by at most one D2D user at the same time, which greatly simplifies the complexity of the problem, but undoubtedly reduces the flexibility of the D2D system

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  • Fast optimization algorithm of D2D power distribution in case of single-channel cellular users

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Embodiment Construction

[0041] The communication rate optimization problem of D2D users based on the cellular network is a complex non-convex nonlinear optimization problem. The cellular users targeted by the present invention are single-channel, and the D2D users are multi-channel. The algorithm can be used in cellular users and power constraints, Under various conditions such as independent power limitation, D2D user and power limitation and independent power limitation, quickly optimize and solve the cellular user transmit power p i and D2D user transmit power q i . The transmission power obtained by using this optimization algorithm can guarantee the communication rate requirements of cellular users, and maximize the sum of communication rates of all D2D users on all cellular frequency bands. The present invention will be further described below in conjunction with the accompanying drawings.

[0042] figure 1 and figure 2 The solid line in the middle is the non-interference channel, and the ...

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Abstract

The invention discloses a fast optimization algorithm of D2D power distribution in case of single-channel cellular users. A communication rate optimization problem of D2D users based on a cellular system is a complex nonconvex nonlinear optimization problem. The cellular users that the fast optimization algorithm aims at utilize a single channel, while the D2D users utilize multiple channels; the algorithm can be used for quickly optimizing and solving the transmitting power pi of the cellular users and the transmitting power qi of the D2D users in a plurality of cases such as cellular users, power limitation and independent power limitation, and D2D users, power limitation and independent power limitation, and the like. The transmitting power obtained by use of the optimization algorithm is capable of ensuring the communication rate requirements of the cellular users and maximizes the sum of the communication rate of all the D2D users on all the cellular frequency bands. The algorithm has the advantages of high convergence rate, small calculation amount, easy implementation, high result accuracy and the like.

Description

technical field [0001] The invention belongs to the D2D communication technology based on the cellular network, and specifically relates to a fast optimization algorithm for power distribution between the cellular user and the D2D user under the conditions of single-channel cellular users and different power constraints. 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 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 ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/04H04W4/00
CPCH04W72/0473H04W72/51
Inventor 王家恒张建飞史锋峰梁霄赵春明
Owner SOUTHEAST UNIV
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