Method for controlling uplink and downlink power

Abstract

The invention discloses a method for controlling uplink power. When the uplink interference is normal, the uplink control is realized by the traditional uplink power control computation method; when the uplink interference has an overload trend and is not serious, if a measured SIR (Surface Impedance Resistance) is less than or equal to a target SIR, the transmitting power of UE (User Equipment) with a larger difference between the measured SIR and the target SIR is enhanced; the mode of alternately enhancing and reducing the transmitting power is adopted for the UE with a smaller difference between the measured SIR and the target SIR so that the competitive raise of the transmitting power of the UE is inhibited; and when the uplink interference is much serious, the mode of alternately enhancing and reducing the transmitting power is adopted for all UEs that follow the fact that the measured SIR is less than or equal to the target SIR so that the transmitting power of the UEs can be kept in a relatively constant state to avoid self-excitation of the power. The invention also provides a method for controlling downlink power. By applying the invention, the problem of the self-excitation of the power due to the competitive raise of the power of adjacent zones under the condition that the same frequency interference is much serious can be solved and the cutting off rate of a user is reduced.

Description

technical field [0001] The invention relates to wireless communication technology, in particular to an uplink and downlink power control method. Background technique [0002] The service provided by the wireless communication network for each user needs to meet a certain quality of service. When the user's transmission power increases, it will increase the interference to other users. When the interference is too large, some users cannot communicate normally. Therefore, it is necessary to adopt a certain power control technology to control the transmission power of users, so as to control the interference between users and improve the system capacity. [0003] Existing power control methods include: inner loop power control, outer loop power control and closed loop power control. The purpose of the outer loop power control is to periodically update the target signal-to-interference ratio (SIR) according to the current wireless environment and service quality requirements. ...

AI Technical Summary

Problems solved by technology

However, when the load of each physical resource is high, handover cannot effectively avoid the self-excitation problem of co-channel interference power

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