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Power distribution method in satellite communication system

A technology of satellite communication system and allocation method, applied in the field of resource allocation

Active Publication Date: 2014-06-11
PLA UNIV OF SCI & TECH
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Problems solved by technology

[0005] The purpose of the present invention is to provide a power allocation method in a satellite communication system to solve the problem of power allocation in a satellite communication system, so as to improve the utilization efficiency of system power resources

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Embodiment Construction

[0029] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0030] combine Figure 1~4 , assuming that the power resources on the satellite in the system can be arbitrarily allocated to different users in different beams, but the total bandwidth of each beam is fixed. The invention mainly solves the problem of how to allocate on-board power for different users in the downlink, so as to improve the overall performance of the system. In this system, it is assumed that the system has K beams and M users. where each beam uses B i Represents, i∈{1,2,…,K}; each user uses U i Denotes, i∈{1,2,…,M}, and in beam B i The collection of all users in the express. The total power on the star in the system is P total . The service application volume of the i-th user is T i , the on-board power resource allocated to it is P i .

[0031] In the actual satellite communication system, the information to be sent by each user i...

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Abstract

The invention discloses a power distribution method in a satellite communication system. The power distribution method comprises the steps of firstly, determining the relation between the capacity of each user and distributed power according to a satellite link budget equation in the satellite communication system; then modeling the power distribution problem in the satellite communication system into a non-linear convex optimization problem with constraints; finally, on the basis of the duality theorem, obtaining the optimal power distribution scheme through solution of the duality problem of the optimization problem. Compared with a traditional uniform or proportional power distribution method, the power distribution method has the advantage that on the premise that the whole system capacity is kept unchanged, the fairness of power distribution to each user is improved; in addition, due to the fact that the satellite link budget equation is adopted to calculate the capacity distributed to each user, the distribution result has higher practicability in the actual satellite communication system.

Description

technical field [0001] The invention belongs to the technical field of resource allocation, and in particular relates to a power allocation method in a satellite communication system. Background technique [0002] In modern satellite communication systems, due to the limitation of the satellite platform, the power resources on the satellite are limited and precious. In order to better meet the service requirements of users, it is necessary to improve the utilization efficiency of power resources. Since each user has different service application volumes, and channel conditions of different users are also different. Therefore, power resources must be dynamically assigned to different users according to the user's service application volume and channel conditions to improve resource utilization. [0003] Power allocation has been extensively studied since it affects the performance of the entire satellite communication system. For example, the well-known "Water Filling Algo...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W52/34
Inventor 刘爱军张邦宁王恒潘小飞郭道省潘克刚童新海张应宪叶展杨思祥丁科方华晋军龚超续欣
Owner PLA UNIV OF SCI & TECH
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