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Energy-efficient power distribution method aiming at mixed energy supply distributed antenna system

A distributed antenna and hybrid energy technology, applied in radio transmission systems, power management, transmission systems, etc., can solve problems such as less research on collected energy and grid energy, and it is difficult to completely eliminate user interference, so as to improve energy efficiency. Effect

Active Publication Date: 2017-08-22
上海瀚芯实业发展合伙企业(有限合伙)
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Problems solved by technology

[0004] The power allocation problem in distributed antenna systems has been widely studied, but in the distributed antenna system with mixed energy supply, there are relatively few studies on how RAU can more effectively use the collected energy and grid energy
Moreover, many traditional energy efficiency studies consider the power allocation problem when system users access orthogonally
There are also many studies on eliminating interference between users through serial interference cancellation technology, so as to ensure that users are not subject to interference, but in actual communication systems, it is difficult to completely eliminate interference between users

Method used

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Embodiment Construction

[0039] The technical solution of the present invention will be further introduced below in conjunction with the accompanying drawings and specific embodiments.

[0040] The single-cell downlink multi-user distributed antenna system for mixed energy supply in this specific embodiment is as follows: figure 1 As shown, there are K users and M RAUs in the cell, figure 1 Where K=M=2. The RAU not only receives power from the grid, but also autonomously collects renewable energy. The system gives priority to using the collected energy to carry data services. When the collected energy is insufficient, the power grid is used to ensure data transmission. It is assumed that both the RAU and the user have a single antenna, and all the RAUs are connected to a central processing unit (Center Unit, CU) through an optical fiber. Assuming that both the sender and the receiver know the channel state information, the RAU sends the data stream x in a cooperative manner k to user k, then the s...

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Abstract

The invention discloses an energy-efficient power distribution method aiming at a mixed energy supply distributed antenna system. The method comprises the following steps: combining the mains supply with the energy acquired by an antenna unit so as to serve for the distributed antenna system in a mixed energy supply way; the system preferentially uses the energy acquired by the antenna unit and takes the mains energy as the reserve capacity. In an optimal problem modelling, the system energy efficiency maximization is used as the target, the rate QoS (quality of service) demand of each user and the antenna unit power constraint are taken as the constraint condition. An optimization problem is transformed into fractional programming problem by use of the Dinkelbach, and then the fractional programming is transformed into a geometric programming problem through continuous convex function approximation, and then the power distribution of the system at the optimal energy efficiency can be obtained through the iterative computation. By considering the interference factor between the users, the energy-efficient power distribution method is not only suitable for the traditional distributed antenna system, but also suitable for the mixed supply distributed antenna system, and the energy efficiency of the distributed antenna system can be obviously improved.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to an energy efficient power distribution method for a distributed antenna system powered by hybrid energy. Background technique [0002] Distributed Antenna Systems (Distributed Antenna Systems, DAS) can shorten the distance between antennas and users, increase macro-diversity gain, and effectively resist fading, Resistance to path loss. Compared with centralized MIMO technology, the transmit power of the antenna can be reduced. However, with the increase in the number of RAUs and transmitting antennas, huge energy consumption and limited power supply are one of the problems that need to be solved urgently. Therefore, it is meaningful to study energy-efficient power allocation methods for distributed antenna systems. [0003] Energy-Harvesting (EH) is an emerging hot technology. If it is applied to DAS, renewable energy can be fully utilized, and RAU can independen...

Claims

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Application Information

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IPC IPC(8): H04B7/0426H04W52/18H04W52/24H04W52/26H04W52/34H04W52/42
CPCH04B7/0426H04W52/18H04W52/241H04W52/243H04W52/265H04W52/346H04W52/42
Inventor 朱鹏程李佳珉肖果平尤肖虎
Owner 上海瀚芯实业发展合伙企业(有限合伙)
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