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Transmitting power controlling method for realizing target signal noise ratio fast convergence

A technology of transmission power control and target signal-to-noise ratio, which is applied in the field of communication, can solve problems such as small step size, impact on system capacity, and large gap, so as to ensure precision and accuracy, ensure the quality of received signals, and shorten the convergence time Effect

Active Publication Date: 2008-12-03
DATANG MOBILE COMM EQUIP CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0017] The purpose of the present invention is to provide a power control method that realizes the rapid convergence of the initial target SNR, so as to solve the relatively large gap between the target SNR and the actual suitable target SNR in the prior art. The problem of how to quickly converge the initial target signal-to-noise ratio in the case of
Due to the currently set power control adjustment period is long and the step size is relatively small, the convergence speed of the target signal-to-noise ratio is slow, which in turn leads to technical problems that affect the quality of the received signal or affect the system capacity

Method used

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  • Transmitting power controlling method for realizing target signal noise ratio fast convergence
  • Transmitting power controlling method for realizing target signal noise ratio fast convergence
  • Transmitting power controlling method for realizing target signal noise ratio fast convergence

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Embodiment Construction

[0033] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0034] When the wireless link is established, there may be a large gap between the target SNR initially set by the sending end and the target SNR required by the system. Adjustment, the original adjustment cycle is shortened from a statistical BLER time to a transmission time interval TTI of a data block. In addition, during the fast convergence period, the present invention dynamically and adaptively adjusts the step size up and down to speed up the convergence speed of the target signal-to-noise ratio. The invention can not only ensure the rapid convergence of the target signal-to-noise ratio, but also enable the target signal-to-noise ratio to converge to a more accurate position.

[0035] see image 3 , which is a schematic flowchart of the transmission power control for realizing the rapid convergence of the target signal-to-noise ratio in the present inventio...

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Abstract

A method for controlling emission power to realize object S-N ratio to be quickly converged includes setting initial valve of step size, receiving data block and storing CRC calibration result, adjusting object S-N ratio as per calibration result i.e. down-adjusting one step size of object S-N ratio if calibration result is correct or otherwise up-adjusting one step size of object S-N ratio, comparing object S-N ratio with measured S-N ratio to generate TPC command being sent to emission end for adjusting its emission power, entering said adjusting step if CRC calibration result is not changed or otherwise ending quick convergence of object S-N ratio.

Description

technical field [0001] The invention relates to the communication field, in particular to a transmission power control method in a CDMA (Code Division Multiple Access) communication system. Background technique [0002] In a CDMA communication system, since the base station and the mobile station use the same wireless frequency band, when the base station transmits a signal to a certain mobile station, the transmission power of the base station will cause interference to the mobile station in this cell and the adjacent cell. Similarly, when the base station receives a signal from a certain mobile station, the received signal will also be interfered by other mobile stations. Therefore, the transmission power control technology must be adopted in the CDMA communication system to ensure the quality of the received signal at the receiving end (base station or mobile station) and to maximize the capacity of the system. That is to say, the transmission power control method is to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/005
Inventor 李楠王定伟
Owner DATANG MOBILE COMM EQUIP CO LTD
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