Method and device for correcting SINR

Abstract

The invention discloses a method and a device for correcting an SINR, and the method comprises the steps: converting a CQI reported by UE into a corresponding SINR through a mapping relation between the CQI and the SINR; according to the length of an up-regulation window and the length of a down-regulation window, respectively counting the ACK number in the up-regulation window and the NACK numberin the down-regulation window, obtaining an accumulated SINR adjustment value delta-SINR and SINR adjustment times according to a statistical result and a set condition, and adding the delta-SINR tothe SINR to obtain an adjusted SINR; adjusting the window length of the up-regulation window and / or the window length of the down-regulation window according to the SINR adjustment times, and adjusting the window length of the down-regulation window according to the adjustment of the window length of the up-regulation window, or adjusting the window length of the up-regulation window according tothe adjustment of the window length of the down-regulation window; and looking up a table according to the adjusted SINR to obtain a candidate MCS and the number of repetitions. Through application ofthe technical scheme disclosed by the invention, an SINR adjustment algorithm can be more flexible, and the change of channels can be better tracked.

Description

technical field [0001] The present application relates to the field of communication technologies, and in particular to a method and device for correcting SINR. Background technique [0002] The downlink adaptive modulation and coding (AMC) algorithm includes three modules, namely: channel quality indicator (CQI) adjustment module, signal-to-interference and noise ratio (SINR) maintenance module, modulation and coding strategy (MCS) and repetition number selection module. The downlink AMC algorithm includes: [0003] The CQI adjustment module is for the UE to adjust the value of the CQI index through the set up and down conditions according to the received ACK / NACK feedback queue, and transfer the adjusted CQI index adj The value is output to the SINR maintenance module. The SINR maintenance module converts the CQIindex according to the CQI mapping table adj Convert to the corresponding SINR value, and then perform reliability correction on the SINR value according to th...

AI Technical Summary

Problems solved by technology

[0009] On the one hand, when the channel condition is poor or the CQI_index reported by the UE is too large, there are more NACKs fed back at this time, and the window length configured by the network is too long, for example, when the window length is configured as 80 and the down-regulation threshold is configured as 0.1, 8 The CQI_index will be lowered only after a NACK. It can be seen that the above fixed value reduces the speed of the lowering

[0010] On the other hand, when the channel condition is good or the CQI_index reported by the UE is too small, more ACKs are fed back at this time, and if the window length configured by the network is too short, for example, when the window length is configured as 20 and the up-adjustment threshold is configured as 1, the detection CQI_index will be raised up to 20 ACKs, which will lead to too fast increase, resulting in an increase in the block error rate

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