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Distributed Antenna System and Its Transmission Power Allocation Method

A distributed antenna and transmission power technology, applied in power management, wireless communication, electrical components, etc., can solve the problems of high power consumption in wireless coverage and low system throughput, so as to improve the quality of uplink channels and increase throughput Effect

Active Publication Date: 2019-01-25
ALCATEL LUCENT SHANGHAI BELL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] One of the objectives of the present invention is to provide a distributed antenna system and its transmission power allocation method, which can solve the problems of high power consumption and low system throughput in wireless coverage in indoor environments

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  • Distributed Antenna System and Its Transmission Power Allocation Method
  • Distributed Antenna System and Its Transmission Power Allocation Method
  • Distributed Antenna System and Its Transmission Power Allocation Method

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Embodiment Construction

[0015] In order to better understand the spirit of the present invention, it will be further described below in conjunction with some preferred embodiments of the present invention.

[0016] In the distributed antenna system, the baseband processing unit is connected to multiple remote radio heads, and each remote radio head can cover one or more user equipments. A user equipment in the coverage area of ​​one of the remote radio heads may be covered by other remote radio heads at the same time. In this case, although the user equipment is substantially served by only one or a few of the plurality of remote radio heads, other remote radio heads still allocate transmission power for the user equipment. Assuming that the distributed antenna system has a bandwidth of 20MHZ, a total of 1200 subcarriers, and the total power of all subcarriers is P, then in the case of equal distribution, the power of each subcarrier is Pi=P / 1200. For each user equipment, its transmission power is t...

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Abstract

The invention relates to a DAS and a transmission power distribution method thereof. A method for distributing the subcarrier power in a DAS comprises that a baseband processing unit determines the practical service relation between a remote RF head and user equipment covered by the RF head; and based on the determined practical service relation, the baseband processing unit determines the power factor for practical transmission subcarrier of the remote RF head, and thus, transmission power is distributed for user equipment which the remote RF head serves practically. The system and method have the advantages that the uplink channel quality of user equipment is improved, and the system throughput is improved.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a distributed-antenna system (DAS, distributed-antenna system) and a transmission power allocation method thereof. Background technique [0002] With the increase of indoor traffic, indoor communication in wireless communication becomes more and more important. The distributed antenna system is currently the most effective indoor coverage solution, and is usually based on optical fiber distributed antenna system. The optical fiber-based distributed antenna system includes a baseband processing unit (BBU, Baseband Unit) and a remote radio head (RRH, Remote Radio Head). All RF front-end functions. [0003] However, there are two main problems in the current distributed antenna system: one is that the baseband processing unit is not aware of the location of the user equipment, and the other is that it cannot dynamically allocate transmission power for each user equipment (Use...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W52/42H04W72/04
CPCH04W52/42H04W72/0473H04W88/085
Inventor 孟艳冷晓冰刘建国
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD