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Method and device for controlling transmitting power

A transmission power control and transmission power technology, applied in the field of communication, can solve problems such as E-DPDCH and E-DPCCH being out of sync and affecting E-DPDCH demodulation performance

Active Publication Date: 2012-10-24
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0005] At present, the transmit power is controlled according to the gain factor configured by the control channel, but the inventor found the following defects in the prior art during the research of the present invention: the total transmit power of the UE in the WCDMA system exceeds the maximum allowable threshold , if E-DCH including E-DPDCH and E-DPCCH is configured, transmit power control may cause E-DPDCH and E-DPCCH to be out of sync
If the demodulation of E-DPDCH is performed, the receiving end may regard the noise in E-DPDCH as useful data, resulting in combining noise into useful data for demodulation, thereby affecting the demodulation performance of E-DPDCH

Method used

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  • Method and device for controlling transmitting power

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Embodiment 1

[0030] figure 1 It is a flow chart of the transmission power control method provided by Embodiment 1 of the present invention. The method specifically includes performing a power control process when it is determined that the total transmission power exceeds the maximum threshold value of the transmission power. The power control subject may be a user-side device or a network-side device. In this embodiment, the power control subject is preferably a user equipment UE. When the power control subject executes a certain strategy to increase the total transmission power, it may cause the total transmission power to exceed the maximum threshold value of the transmission power and a power control process needs to be executed. Wherein the power control process includes at least the following steps:

[0031] Step 110, when the total transmit power exceeds the maximum threshold value of transmit power, reduce the gain factor of the data channel;

[0032] Step 120, when the power rati...

Embodiment 2

[0034] figure 2 It is a flow chart of a transmission power control method provided in Embodiment 2 of the present invention. The transmission power control method includes at least the following steps:

[0035] Step 210, when the total transmit power exceeds the maximum threshold value of transmit power, reduce the gain factor of the data channel;

[0036] Step 220: When the power ratio of the data channel to the first control channel is less than the threshold value of the power ratio, if at least one of the data channels is in the DTX state, put all the data channels in the DTX state , and put the second control channel in the DTX state.

[0037] In Embodiment 1 and Embodiment 2, the threshold value of the power ratio is the minimum value between the ratio configured by the high layer and the power ratio between the data channel and the first control channel before reducing the gain factor of the data channel, or the power ratio The threshold value is the minimum value in...

Embodiment 3

[0043] The transmission power control method provided by Embodiment 3 of the present invention is applicable to a WCDMA system, specifically, it is applicable to a UE performing transmission power control in an uplink of a WCHMA system as an example.

[0044] If the total transmit power of the UE in the WCDMA system exceeds the maximum threshold value of transmit power, in the case where E-DCH including E-DPDCH and E-DPCCH is configured, in order to reduce the total transmit power, the UE first reduces the E- The gain factor of the DPDCH, as the gain factor of the E-DPDCH decreases, some or all of the E-DPDCH may be in the DTX state. DTX is discontinuous transmission. For example, in a communication process, users only have a small time to talk. In order to save system resources and reduce interference in the system, no messages are sent during the gap period, but comfortable noise is sent. Because in the prior art, no matter what state the E-DPDCH is in, the E-DPCCH will cont...

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Abstract

The invention discloses a method and a device for controlling a transmitting power. The method comprises the following steps of reducing a gain factor of a data channel when a total transmitting power exceeds a maximum threshold value of the transmitting power; and after a power ratio of the data channel and a first control channel is less than the threshold value of the power ratio, and if the data channels are in a discrete transmission (DTX) state, setting a second control channel into the DTX state. According to the method and the device for controlling the transmitting power provided by the invention, the problem of data channel demodulation performance reduction caused by introducing noises when a receiving terminal demodulates the data of the data channel as the data channel and the control channel are asynchronous can be solved, and demodulation performance of the data channel during a power control process is improved.

Description

technical field [0001] Embodiments of the present invention relate to communication technologies, and in particular, to a method and device for controlling transmission power. Background technique [0002] With the rapid development of communication technology, Wideband Code Division Multiple Access (WCDMA for short), as one of the mainstream technologies of the third generation mobile communication system, has been extensively researched and applied worldwide. [0003] At present, WCDMA already has multiple versions such as the 99th version (Release99, R99), the 4th version (Release4, R4)-the 10th version (Release10, R10). In order to increase the data transmission rate and meet different needs, WCDMA introduced the High Speed ​​Downlink Packet Access (HSDPA) technology in the fifth release (Release5, R5), and introduced the High Speed ​​Downlink Packet Access (HSDPA) technology in the sixth release (Release6, R6) Among them, the uplink is optimized and evolved for the pac...

Claims

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Application Information

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IPC IPC(8): H04W52/04
CPCY02B60/50
Inventor 邵家枫赵悦莹
Owner HUAWEI TECH CO LTD
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