A method and device for reducing decoding misdetection of convolutional codes

Abstract

The invention relates to the field of communications, and discloses a method and device for reducing decoding misdetection of convolutional codes, which can reduce the probability of false detection of convolutional code decoding. The method includes: decoding the uplink scheduling convolutional code and / or the downlink scheduling convolutional code, storing the decoded intermediate information, and the uplink and / or downlink scheduling convolutional codes are convolutions carrying uplink and / or downlink scheduling information respectively Product code, the data obtained by decoding are uplink scheduling data or downlink scheduling data respectively; CRC check is performed on uplink scheduling data or downlink scheduling data; if the CRC check of uplink and / or downlink scheduling data is correct, then combined with the decoding intermediate For the uplink and / or downlink scheduling data, a second verification is performed; if the result of the second verification of the uplink scheduling data meets the uplink preset condition, it is determined that the decoding of the uplink scheduling convolutional code is correct, otherwise it is a false detection; if If the result of the secondary verification of the downlink scheduling data satisfies the downlink preset condition, it is determined that the downlink scheduling convolutional code is decoded correctly; otherwise, it is a false detection.

Description

Technical field [0001] The present invention relates to the field of communication, and in particular to a method and device for reducing the error detection of convolutional code decoding. Background technique [0002] In the LTE (Long Term Evolution) communication system, the PDCCH (physical downlink control channel) is a set of physical resource particles, which carries uplink and downlink control information. According to different scopes, the PDCCH bears The information distinguishes public control information and dedicated control information. The public search space is used to search for public control information, and the dedicated search space is used to search for dedicated control information. The search space defines the starting position of blind detection and the channel search method. The PDCCH channel mainly carries the PUSCH. (Physical Uplink Shared Channel, physical uplink shared channel) and PDSCH (Physical Downlink Shared Channel, physical downlink shared chan...

AI Technical Summary

Problems solved by technology

Therefore, relying solely on the result of the CRC check to judge whether the convolutional code is decoded correctly will lead to a high probability of false detection

Once a false detection occurs, it may cause some unpredictable errors in the terminal

When a PDCCH is misdetected, regardless of whether the misdetected PDCCH is scheduled for uplink transmission or downlink reception, it will lead to an increase in terminal processing and power consumption.

Furthermore, if the wrongly detected PDCCH is scheduled for uplink transmission, the terminal will also send uplink data wrongly, which will further increase system interference and cause high-level retransmissions to reduce the uplink rate of the terminal

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