US 12,355,562 B2
Channel reencoding to reduce invalid physical downlink control channel signals
Jiancao Hou, Surbiton (GB); Wei Li, Stevenage (GB); Matthew David Brown, Hants (GB); and Chi-ming Leung, Hardwick (GB)
Assigned to VIAVI Solutions Inc., Chandler, AZ (US)
Filed by VIAVI Solutions Inc., Chandler, AZ (US)
Filed on Oct. 21, 2022, as Appl. No. 18/048,809.
Prior Publication US 2024/0137153 A1, Apr. 25, 2024
Prior Publication US 2024/0235734 A9, Jul. 11, 2024
Int. Cl. H04L 1/00 (2006.01); H03M 13/13 (2006.01); H03M 13/37 (2006.01); H04L 1/20 (2006.01); H04L 1/24 (2006.01)
CPC H04L 1/0038 (2013.01) [H04L 1/208 (2013.01); H04L 1/24 (2013.01); H03M 13/13 (2013.01); H03M 13/3776 (2013.01); H04L 1/0054 (2013.01); H04L 1/0061 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method, comprising:
receiving, by a device, a physical downlink control channel (PDCCH) signal from a base station;
providing, by the device, the PDCCH signal to a special-purpose processor of the device;
decoding, by the special-purpose processor, encoded bits of the PDCCH signal to generate coded bits;
reencoding, by the special-purpose processor, the coded bits;
calculating, by the device, a detection error probability of each coded bit at an output of soft demodulation;
calculating, by the device, a channel decoding error probability that cyclic redundancy check bits are still attached to the coded bits;
calculating, by the device, an error probability of channel reencoding, of each coded bit of the coded bits, due to error propagation of polar decoding and reencoding;
calculating, by the device, a probability density of a bit mismatch ratio associated with the coded bits;
calculating, by the device, a threshold based on the detection error probability, the channel decoding error probability, the error probability of channel reencoding, and the probability density of a bit mismatch ratio;
determining, by the special-purpose processor, whether the bit mismatch ratio associated with the coded bits is greater than the threshold; and
performing, by the device, one or more actions based on determining whether the bit mismatch ratio associated with the coded bits is greater than the threshold.