Power control method and mobile station

A technology of power control and closed-loop power control, applied in the field of communication

Active Publication Date: 2010-09-22
SHANGHAI HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the adaptive retransmission of message 3 cannot quickly adjust the power for larger compensation under the premise of smaller power control granularity

Method used

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  • Power control method and mobile station
  • Power control method and mobile station
  • Power control method and mobile station

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Please refer to figure 1 , which is a schematic diagram of a power control method provided in Embodiment 1 of the present invention, including:

[0024] 101: Determine a closed-loop power control value according to a pre-established correspondence between a code point and each closed-loop power control value, where the code point is composed of bits in the bit joint control signaling field of the transmission power control (TPC) field ;

[0025] 102: Adjust transmit power by using the determined closed-loop power control value.

[0026] It should be noted that the value of the closed-loop power control may be an absolute value or an adjustment difference.

[0027] In the embodiment of the present invention, the transmit power is jointly indicated by combining bits in the TPC field with a code point composed of bits in the control signaling field, thereby obtaining a more accurate closed-loop power control value with a larger value range. This allows for more efficien...

Embodiment 2

[0029] Taking the LTE system as an example, in the contention mode random access process, when message 3 is initially transmitted or adaptively retransmitted, the channel quality information request (CQI request field) is a reserved field with 1 bit, so the TPC field can be The bits in the CQI request field are combined with the bits in the CQI request field to perform power indication.

[0030] Please refer to figure 2 , is a schematic diagram of the method in Embodiment 2 of the present invention, specifically:

[0031] 201: Combine the bits in the TPC field and the bits in the CQI request field to form a code point;

[0032] 202: Establish a correspondence between the code point and each closed-loop power control value;

[0033] 203: When message 3 is initially transmitted or adaptively retransmitted, determine a closed-loop power control value according to the correspondence;

[0034] 204: Perform power control on the transmit power according to the determined closed-l...

Embodiment 3

[0062] Please refer to image 3 , which is a schematic structural diagram of a mobile station according to Embodiment 3 of the present invention, and may include:

[0063] The determining unit 301 is configured to determine a closed-loop power control value according to a pre-established correspondence between a code point and each closed-loop power control value, the code point being a bit in the bit joint control signaling field of the transmission power control TPC field consist of;

[0064] The adjusting unit 302 is configured to use the closed-loop power control value determined by the determining unit 301 to adjust the transmission power.

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Abstract

The invention embodiment discloses a power control method and a mobile station. The method disclosed by the invention embodiment comprises the following steps: determining a closed loop power control value according to the corresponding relation of a code point built in advance and each closed loop power control value, wherein the code point consists of a TPC domain bit and a combination control signaling domain bit; and adjusting transmitting power by using the determined the closed loop power control value. The power can be adjusted more effectively through the invention embodiment.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a power control method and a mobile station. Background technique [0002] In the Long Term Evolution (LTE, Long Term Evolution) of the 3rd Generation Partnership Project (3GPP, The 3rd Generation Partnership Project), the uplink power control of the Physical Uplink Shared Channel (PUSCH, Physical Uplink Shared Channel) adopts open-loop power control and closed-loop power control phase way of combining. [0003] The accuracy of fading estimation for open-loop power control is based on the fact that uplink and downlink have consistent fading. However, in the frequency duplex (FDD) mode, the frequency bands of the uplink and downlink are inconsistent, and the difference is far greater than the coherent bandwidth of the signal, so the fading conditions of the uplink and downlink are completely irrelevant. This results in less accurate fade estimation for open-loop power con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W52/08
CPCY02B60/50
Inventor 汪凡
Owner SHANGHAI HUAWEI TECH CO LTD
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