Method and Base Station for Realizing Inner Loop Closed Loop Power Control

Abstract

The invention provides a method for realizing inner-loop closed-loop power control. In this method, when the user equipment is in the soft handover state, the cell that does not belong to the same radio link set as the serving cell of the user equipment is controlled to issue a fixed power control instruction to notify the user equipment to increase the transmission power, which effectively limits the non-serving cells. The adverse effect on the user equipment prevents the uplink control channel serving the HS-DSCH cell, especially the problem of unreliable decoding of the HS-DPCCH channel, and improves the service quality of HSDPA. The invention also provides a base station for realizing inner-loop closed-loop power control.

Description

technical field [0001] The invention relates to a power control technology, in particular to a method and a base station for realizing inner-loop closed-loop power control. Background technique [0002] The service provided by the wireless cellular network for each user needs to meet certain service quality requirements, but the service quality is mainly determined by the SIR (signal-to-interference, signal-to-interference ratio) of each user's received signal. Taking the Wideband Code Division Multiple Access (WCDMA) system as an example, each user in the same cell occupies the same frequency band and time, and users are isolated from each other only by the orthogonality of spreading codes. However, due to wireless Due to channel multipath, delay and other reasons, the mutual correlation between signals of each user is not ideal, and other users will interfere with the current user. In this way, when the number of inter-cell users increases or the power of other users incr...

AI Technical Summary

Problems solved by technology

At this time, it is very likely that the UE received the inner-loop closed-loop power control instruction of the macro cell requiring the UE to increase the transmit power, but the UE received the inner-loop closed-loop power control instruction of the micro cell cell requiring the UE to reduce the transmit power.

According to the current inner-loop closed-loop power control combination principle, as long as one of the power control instructions received by the UE requests to reduce the transmit power, the UE will reduce the transmit power, resulting in further degradation of the UE's signal received by the macro station.

At this time, the decoding of the uplink control channel from the UE to the HS-DSCH cell served by the macro station, especially the HS-DPCCH channel (the HS-DPCCH channel contains the acknowledgment message ACK / NACK of the hybrid automatic repeat transmission and the downlink channel quality indicator CQI information) changes. Unreliable (ACK / NACK decoding errors will cause HSDPA (High Speed ​​Downlink Packet Access, High Speed ​​Downlink Packet Access) packet loss or increase unnecessary retransmissions, CQI decoding errors will cause HSDPA scheduling blocks to be too large and cannot be decoded correctly or the scheduled block is too small to waste resources), which seriously affects the service quality of HSDPA

[0006] In short, according to the current inner-loop closed-loop power control method, when the UE is in the process of soft handover and the uplink and downlink are unbalanced, it is very easy to cause the uplink control channel of the serving HS-DSCH cell, especially the HS-DPCCH channel, to be undecoded. Reliable issues that affect service quality

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