Adjustment method and device for outer loop link self-adaptation

Abstract

Embodiments of the present invention provide an adaptive adjustment method and device for an outer ring link. By acquiring at least one channel quality information of a terminal device, the base station obtains at least one channel quality information of the terminal device and the channel quality of multiple clusters in the cell. Range, determine the target cluster to which the terminal device belongs, and update the SINR error adjustment amount of the target cluster and the channel quality fluctuation parameter of the cell according to at least one channel quality information of the terminal device, and finally according to the SINR error adjustment amount of the target cluster and the channel quality of the cell The fluctuation parameter determines the initial value of the OLLA adjustment amount of the terminal equipment. The method of this embodiment determines the initial value of the OLLA adjustment amount of the terminal device from the two dimensions of SINR measurement error and SINR fluctuation, and takes into account the difference in channel quality of different terminal devices during adjustment, so that the initial value of the OLLA adjustment amount of the terminal device more precise.

Description

Technical field[0001]The embodiments of the present invention relate to communication technology, and in particular, to an adjustment method and device for Outer Loop Link Adaptation (OLLA for short).Background technique[0002]Adaptive Modulation and Coding (AMC) technology has been widely used in wireless transmission systems. This technology adapts the modulation and coding scheme (Modulation Coding Scheme, MCS) used by the communication system adaptively. Equipped with constantly changing wireless channel quality, thereby improving the reliability of wireless transmission and system throughput. Specifically, the technology needs to monitor the Signal to Interference Noise Ratio (SINR) of the wireless channel to measure the quality of the wireless channel, and predict the channel quality at the future time based on the measurement result. Finally, use the prediction result to search The preset SINR threshold table, select the appropriate MCS.[0003]Due to the unideal factors in the ...

AI Technical Summary

Problems solved by technology

However, the existing OLLA initial value adopts a fixed initial value, which cannot reflect the situation of all wireless environments

Improper selection of the initial value of OLLA will directly lead to a longer time required for OLLA to adjust to the convergence state, thus affecting the performance of the system

Especially, for the small packet service in the mobile broadband (Mobile Broad Band, MBB) service, the transmission time of the data service is short, and there is not enough data for the adjustment and convergence of the OLLA

Therefore, during the entire transmission process of the small packet service, due to the deviation of the OLLA adjustment amount, the performance of the AMC is greatly reduced

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