Uplink power control method and device

Abstract

The invention discloses an uplink power control method and an uplink power control device. The method comprises: pre-estimating the transmission power control command and power gain of a time slot and the time slot domain of a high-speed special physical control channel in the time slot; and computing a transmission power and a gain factor according to the result of the pre-estimation. The method and the device solve the problem that it is difficult to accomplish power control computing within 512chips in the prior art, thereby avoiding the limitation of 512chips, allowing the entire system to complete channel quick power control over channels including high speed packet access(HSPA) effectively and ensuring system performance and stability.

Description

technical field [0001] The present invention relates to the communication field, and in particular, relates to an uplink power control method and device in Universal Mobile Telecommunications System (UMTS for short) / HSPA. Background technique [0002] In order to overcome the "near-far effect" and combat fast fading of wireless channels, the Wideband Code Division Multiple Access (WCDMA) system introduces power control technology. Data Channel, referred to as DPDCH) DPDCH / DPCCH dedicated physical control channel (Dedicated Physical Control Channel, referred to as DPCCH), mainly uses closed-loop power control, which includes outer loop power control (slow power control) and inner loop power control (Fast power control), especially in the uplink, if there is no power control, the user equipment (User Equipment, referred to as UE) transmitting with super power will block the entire cell; the outer loop power control is mainly through the statistical dedicated physical channel (...

AI Technical Summary

Problems solved by technology

In order to achieve "fast" power control and effectively counteract the effect of deep fading, the 3Gpp protocol has strict requirements on the timing of uplink power control, that is, each time slot (slot) needs to perform uplink power control according to the power control command TPC. adjustment, and the time from sending the uplink power control command TPC to the completion of an uplink power control is only 512chips from the base station side, and the timing relationship is as follows figure 1 As shown, after the introduction of HSPA in R5 and R6, due to the large increase in the number of uplink dedicated physical channels, the power calculation amount of the uplink channel is greatly increased, and it is often difficult to guarantee a calculation within 512chips, making the entire system performance decline and instability

[0017] It can be seen from the existing technical solutions that the focus of uplink power control is often on how to improve the effect of power control; and in order to obtain better power control performance, it is often necessary to use more data and perform a larger amount of calculations, so that First, it is difficult to meet the task of completing a power control calculation within the 512chip

[0018] The focus of uplink power control in related technologies is often on how to improve the effect of power control, and in order to obtain better power control performance, it is often necessary to use more data and perform a larger amount of calculations, so it is difficult to meet the needs of 512chips The problem of completing the task of power control calculation within one time has not yet proposed an effective solution

Images