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Uplink power control method and network side equipment

A power control, network-side technology, applied in transmission control/equalization, advanced technology, communication between multiple stations, etc. The effect of improving compatibility

Active Publication Date: 2008-03-12
HUAWEI TECH CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0011] In practical applications, there are the following problems: the transmission power of the wireless terminal is wasted, and the burden on the wireless terminal is increased
[0012] The main reason for this situation is that in the prior art, when there are not enough MCS schemes to choose from, in the SINR-BLER performance curve, the SINR spacing between some adjacent curves will be relatively large (such as spacing 1db above), so that when the specified BLER hard threshold is met, the actual SINR value of the channel exceeds the SINR required by the MCS finally selected by the AMC
Without considering the deviation and delay of the channel SINR measurement, the actual SINR has a lot of margin at this time, which causes a waste of transmit power of the wireless terminal and increases the burden on the wireless terminal

Method used

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Embodiment Construction

[0035] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0036] The core of the present invention is that the network side selects the MCS for the corresponding wireless terminal according to the measured uplink SINR and the maximum BLER threshold, and subtracts the selected MCS from the measured SINR under the maximum BLER threshold. When the difference obtained by the SINR is greater than the preset value, the corresponding wireless terminal is notified to reduce the transmission power of the uplink. Prompt the wireless terminal to provide only the transmission power necessary to meet the transmission rate when its transmission rate has been determined, avoid or reduce the power waste of the wireless terminal and the network side, and reduce the impact of the wireless terminal on other users in the cell and on the rela...

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Abstract

The present invention discloses an uplink power control method and a network side device to enable users to reduce power loss of wireless terminals to acquire the same transmission rate. In the present invention, a network side selects a MCS for a corresponding wireless terminal according to measured uplink SINR and maximum BLER threshold and notifies the wireless terminal to reduce its uplink transmission power while a difference between the SINR and a SINR needed for the maximum BLER threshold of the MCS. While the network side notifies the MCS selected by the wireless terminal, the network side informs the wireless terminal of reducing its uplink transmission power by dispatching an uplink control command. When the wireless terminal receives one uplink power control command, the wireless terminal reduces its uplink transmission power by one step length.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to the uplink power control technology of wireless terminals. Background technique [0002] The third-generation mobile communication system Wideband Code Division Multiple Access (WCDMA) system is popular because of its powerful multimedia communication capabilities, high-speed data transmission rate and efficient spectrum utilization. And become the development goal of future mobile communication. However, the development of technology is endless, and the rapidly rising demand for mobile multimedia communication and increasingly tight wireless resources also put forward higher and higher requirements for the performance of WCDMA systems. [0003] In the cellular communication system led by WCDMA, the received signal quality of the wireless terminal is related to many factors, such as the distance between the terminal and the base station and the base station of adjacent cells,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/005H04B7/26
CPCY02B60/50Y02D30/70
Inventor 王向华
Owner HUAWEI TECH CO LTD
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