Method for controlling upline control channel power in soft switching of high speed data packet insertion system

A technology for controlling channel power and control methods, which is applied in the field of uplink control channel power control in soft handover of high-speed data packet access systems, can solve problems such as occupation, achieve low transmission power, reduce average transmission power, and reduce the impact on other code channels Interference, the effect of saving transmission power

Inactive Publication Date: 2003-10-22
HUAWEI TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

For the former proposal, additional pilot symbols need to be added, occupying the position where CQI bits are transmitted

Method used

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  • Method for controlling upline control channel power in soft switching of high speed data packet insertion system
  • Method for controlling upline control channel power in soft switching of high speed data packet insertion system

Examples

Experimental program
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Embodiment Construction

[0012] Since the HSDPA high-speed uplink control channel HS-DPCCH communicates with only one base station at any time, including when the UE is in the soft handover area, during the soft handover period, if the HS-DPCCH power follows the R99 uplink DPCCH, the communication quality cannot be guaranteed. A fixed offset is added on the basis of the transmit power. Since this value must ensure that the HS-DPCCH power is higher than the target value during all periods of soft handover, it will cause waste of transmit power. Based on the above facts, the essence of the present invention is that the UE side detects the R99 uplink DPCCH channel power level, judges whether the R99 uplink DPCCH channel power level is not lower than the power target value in the HSDPA serving base station according to the detection result, and then performs an uplink HS-DPCCH The transmission power is dynamically adjusted so that the HS-DPCCH receiving signal-to-noise ratio remains near the target value, ...

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Abstract

The method sets powr offset of HS-DPCCH and RPP DPCCH as system default offst when UE is entering soft-switching area. It receives TPC of each base station and carries on TPC combination as well as sets power offset of HS-DPCCH and R 99 uplink DPCCH as system default offset if frequency of the combined TPC being the same with TPC received from service base station is over the appointed figure, and increases power offset tobe one more capacity if the combined TPC note being the same with TPC received from service base station at it being in range of the maximum allowable power offset when UE is on the period of soft-switching. By applying the method, HS-DPCCH emission power can be controlled in real-time when UE is at soft-switching area.

Description

technical field [0001] This patent relates to a power control method of a wireless communication system, in particular to a power control method of an uplink control channel of a Wideband Code Division Multiple Access (WCDMA) High Speed ​​Downlink Packet Access (HSDPA, High Speed ​​Downlink Packet Access) system in a soft handover area. Background technique [0002] The high-speed uplink control channel (HS-DPCCH) of the HSDPA system contains two parts of information, one part is the hybrid automatic repeat request response information ACK / NACK that the mobile station feeds back to the base station, indicating whether the mobile station has correctly received the corresponding data from the base station packet, ACK / NACK is sent in one slot. The other part is the downlink channel quality indicator information CQI, which is sent at a certain period within 2 time slots. Since the CQI is reported periodically, the system has no requirement on the bit error of the CQI. The erro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/005
CPCH04W52/146H04W52/325H04W52/40H04W52/286
Inventor 吴迪魏岳军
Owner HUAWEI TECH CO LTD
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