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Power control method of uplink multiple input multiple output channel

A power control and multi-output technology, applied in transmission control/equalization, power management, wireless communication, etc.

Inactive Publication Date: 2011-03-30
夏普高科技研发(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention proposes a method for solving uplink power control for the uplink using MIMO transmission mode

Method used

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  • Power control method of uplink multiple input multiple output channel
  • Power control method of uplink multiple input multiple output channel
  • Power control method of uplink multiple input multiple output channel

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Embodiment Construction

[0016] In order to clarify and describe the implementation steps of the present invention in detail, some specific embodiments of the present invention are given below, which are applicable to mobile communication systems supporting uplink using MIMO technology, especially LTE-Advanced cellular mobile communication systems. It should be noted that the present invention is not limited to these applications, but is applicable to more other related communication systems.

[0017] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, and unnecessary details and functions for the present invention will be omitted during the description to avoid confusing the understanding of the present invention.

[0018] The present invention takes the power control mechanism of the existing LTE system as an example to illustrate the required power control behavior after the MIMO transmission mode is introduced into the up...

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Abstract

The invention provides a method for solving uplink power control aiming at an uplink adopting MIMO transmission mode. The uplink transmitting power depends on the size of transmission block (or modulation coding scheme MCS), path loss, precoding vector type, bandwidth and base station expected receiving power (or signal to noise ratio) and the like. Uplink multi-antenna transmission is utilized, so that the base station obtains certain array gain and user equipment can correspondingly reduce uplink transmitting power; each transmission block of uplink transmission can share the same MCS parameter, the same array gain parameter or the same power adjusting parameter, or each transmission block has respective MCS parameter, array gain parameter and power adjusting parameter; under the conditions that the uplink adopts space multiplexing and CMP precoding vector is utilized, the actual transmitting power of antenna depends on the transmitting power of the layer where the antenna is transmitted; under the conditions that uplink adopts space multiplexing and CMF precoding vector is utilized, the transmitting power of antenna depends on the sum of transmitting powers of each layer where the antenna is transmitted actually, and the base station configures maximum transmitting power of each layer in a semi-static or dynamic way.

Description

technical field [0001] The present invention relates to a cellular mobile communication system, more particularly, to a method for controlling uplink transmission power of user equipment in a cellular communication system adopting multiple-input multiple-output (MIMO) technology. Background technique [0002] With the development of information technology, the demand for access rate of mobile terminals is getting higher and higher, which makes the future mobile communication system to have a higher transmission rate. The improvement of the transmission rate can be achieved by increasing the system transmission bandwidth or spectrum utilization. In the uplink transmission methods of communication systems such as WCDMA, TD-SCMDA, and LTE that use fixed bandwidth, the improvement of spectral efficiency is mostly achieved through power control and high-order modulation. In the discussion of IMT-Advanced technology research and standards such as LTE-Advanced, the uplink multiple...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W52/00H04B7/005
Inventor 张应余刘仁茂丁铭梁永明黄磊
Owner 夏普高科技研发(上海)有限公司
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