Outer loop power control method and device

Abstract

The invention discloses an outer loop power control (OLPC) method and device. The method includes the following steps: a. judging whether a wind-up model is activated, carrying out Step b if the wind-up model is activated, and carrying out Step d if the wind-up model is not activated; b. adjusting a target signal to noise ratio (SNR) as a first target SNR or a second target SNR in the nth cycle of OLPC adjustment, judging whether the wind-up model is still active at the end of the nth cycle, carrying out Step c if the wind-up model is still active, and carrying out Step d if the wind-up model is not active; c. adjusting the target SNR as the second target SNR or the first target SNR in the (n+1)th cycle of OLPC adjustment, judging whether the wind-up model is still active at the end of the (n+1)th cycle, adding 2 to the variable n and returning to Step b if the wind-up model is still active, and carrying out Step d if the wind-up model is not active; and d. carrying out the adjustment of the target SNR according to the normal model, wherein n is an integer equal to or larger than 1, the first target SNR is larger than the actual SNR, and the second target SNR is smaller than the actual SNR.

Description

technical field [0001] The invention is applied in the communication field, and in particular relates to an outer loop power control method and equipment in a wind-up mode of the outer loop power in the mobile communication field. Background technique [0002] Power control is an important aspect in communication systems such as CDMA. The purpose of power control is to ensure that the sending end transmits with an appropriate power, so as to avoid interference to adjacent systems caused by excessive power or communication failure caused by too low power. Power control is divided into outer loop power control (OLPC) and inner loop power control (or called fast power control). The process of inner loop power control is that the receiving end (base station or mobile terminal) adjusts the transmission power of the transmitting end by feeding back a power control command to the transmitting end (base station or mobile station), so as to achieve an acceptable signal-to-noise rati...

AI Technical Summary

Problems solved by technology

[0005] However, the disadvantage of the above method is that the SIR is adjusted after exiting the winding tightening mode is detected target It will still take a long time for the transmit power to fall back to normal mode, so it will cause interference to other channels for a long time after exiting the wind-up mode

[0009] However, although the above method realizes the rapid contraction of the transmission power when exiting the winding-up mode, the adjustment made when exiting the winding-up mode leads to the prolongation of the winding-up mode time, which is not conducive to the improvement of the overall performance of the system

[0010] In addition, the three methods described above all have a common disadvantage, that is, in the tight mode, the transmission power of the sending end is maintained at a very high level. If the sending end is a mobile terminal, the battery consumption is very serious.

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