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D2D power distribution fast optimization algorithm in presence of multichannel cellular subscribers

A technology of cellular users and optimization algorithms, applied in the field of D2D communication, can solve problems such as reducing the flexibility of D2D systems

Active Publication Date: 2015-11-25
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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  • D2D power distribution fast optimization algorithm in presence of multichannel cellular subscribers

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Embodiment Construction

[0026] 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 multi-channel, and the D2D users are multi-channel. The application of this algorithm can limit the independent power of cellular users, Under the condition of D2D user 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 on all cellular frequency bands, 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.

[0027] figure 1 and figure 2 The solid line in the middle is the non-interference channel, and the dotted line i...

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Abstract

The invention provides a D2D power distribution fast optimization algorithm in presence of multichannel cellular subscribers. The communication speed optimization problem of cellular network based D2D subscribers is a complex non-convex and non-linearity optimization problem. Aiming at the multichannel cellular subscribers and multichannel D2D subscribers, the transmission power pi of the cellular subscribers and the transmission power qi of the D2D subscribers can be optimized and solved rapidly under the conditions of independent power limitation of the cellular subscribers and independent power limitation of the D2D subscribers by applying the algorithm. The transmission power obtained by adoption of the optimization algorithm can ensure requirements of the cellular subscribers on the communication speeds on all the cellular frequency bands and can maximize the sum of the communication speeds of all the D2D subscribers on all the cellular frequency bands. The algorithm has the advantages of a fast rate of convergence, low calculated amount, easy implementation, high result precision and the like.

Description

technical field [0001] The present invention belongs to the D2D communication technology based on the cellular network, and specifically relates to a method for power allocation between the cellular user and the D2D user under the condition that the cellular user occupies multiple channels, and the cellular user and the D2D user have a maximum transmission power limitation on each frequency band. Fast optimization algorithm. 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...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W52/26H04W52/38
CPCH04W52/265H04W52/267H04W52/383
Inventor 王家恒张建飞史锋峰梁霄赵春明
Owner SOUTHEAST UNIV
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