Virtual closed loop power control method used in uncontinuous transmission period

Abstract

The invention discloses a virtual closed loop power control method used in a discontinuity transmission period. In receiving two gusty front and back interval periods of the same transmitting terminal, the method carries out a single operation as follows every a period of fixed time: Virtual signal to interference ratio is calculated; a corresponding TPC command word is set up according to the calculated virtual SIR; the TPC command word is transmitted to an emission end. Good power control effect can be obtained by using the method, thus guaranteeing the reception quality of the emission end and controlling disturbance on other users.

Description

technical field [0001] The invention relates to a power control technology in a wireless communication system, in particular to a virtual closed-loop power control method used during discontinuous transmission. Background technique [0002] In a time-division code-division multiple access (TD-SCDMA) system, when the number of users in the network increases or the transmission power of other users increases, the interference to the current user will increase, resulting in the current user's signal at the receiving end. The signal-to-interference ratio (SIR) decreases. When such interference is large enough, the current user cannot communicate normally. Therefore, it is necessary to adopt a certain power control technology to control the user's transmission power, so that each user can obtain acceptable call quality with the minimum transmission power corresponding to the current wireless environment, thereby minimizing the interference between users and improving system capa...

AI Technical Summary

Problems solved by technology

[0017] However, the above method ii has the following disadvantages: on the one hand, signaling cannot be sent too frequently, otherwise the burden on the air interface will be increased; Users cause relatively strong interference, which affects the overall quality of the system

[0034] Due to scheduling reasons, the continuous transmission of HS-SCCH / HS-SICH for a certain user cannot be guaranteed. Therefore, in most cases, HS-SICH will adopt open-loop power control

However, frequent open-loop power control also has the same problems as the existing DTX period power control method ii, namely: increased burden on the air interface and increased interference to other users

[0035] From the above analysis, it can be seen that the performance of the existing power control method used during discontinuous transmission is relatively poor, resulting in poor power control effect, unable to guarantee the reception quality of the receiving end and control the interference to other users

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