Soft handover downlink power control system and its method

Abstract

The related control system to soft switch down power can make a compromise for up and down link to avoid linkage couple and receiving SIR fluctuation, wherein for weak up signal, it stops down inner power control as up TPC, and changes into down inner power control as DPB algorithm. This invention also set the down minimal emission power as mean value minus an offset.

Description

technical field [0001] The invention relates to the power control technology in mobile communication, in particular to the power control technology in the mobile communication system based on code division multiple access. Background technique [0002] CDMA is a mobile communication technology developed on the basis of spread spectrum communication technology. It uses spread spectrum codes to distinguish different users, and transmits data through wireless links after spread spectrum. CDMA technology has the characteristics of high confidentiality, strong anti-interference, high spectrum utilization, simple network planning, large system capacity and flexibility, and has become the mainstream technology for the future development of mobile communications. Currently, several third-generation mobile communications (TheThird Generation, referred to as "3G") technical standards, including code division multiple access 2000 (Code Division Multiple Access 2000, referred to as "CDM...

AI Technical Summary

Problems solved by technology

[0036] In practical applications, the above solution has the following problems: the existing technical solution will cause waste of UE transmit power and increase uplink interference

[0037] The main reason for this situation is that neither the prior art scheme 1 nor the prior art scheme 2 takes into account the unbalanced coupling loss between links during soft handover, and the unbalanced coupling loss between links in soft handover is actually It is unavoidable, which may cause unbalanced received signals. At this time, because the uplink transmission power of the UE is controlled by the downlink with better received signals, and the quality of the uplink corresponding to the downlink is poor, the network side should The received signal of the uplink is also poor, and the UE will be required to increase the uplink transmission power. In fact, the uplink quality of the other link is better, and the received signal can fully meet the requirements. The UE does not need to increase the power. This wrong power The adjustment will continue until the received signal is balanced, which will cause a waste of UE transmit power, increase the fluctuation of the uplink received SIR, and increase the uplink interference

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