US 11,729,666 B2
Retransmission schemes based on LLR combining in WLAN
Jianhan Liu, San Jose, CA (US); Yongho Seok, San Jose, CA (US); Chung-ta Ku, San Jose, CA (US); and Thomas Edward Pare, Jr., San Jose, CA (US)
Assigned to Mediatek Singapore PTE. LTD., Singapore (SG)
Filed by MediaTek Singapore Pte. Ltd., Singapore (SG)
Filed on Jan. 5, 2022, as Appl. No. 17/569,299.
Application 17/569,299 is a continuation of application No. 16/570,518, filed on Sep. 13, 2019, granted, now 11,252,603.
Claims priority of provisional application 62/743,010, filed on Oct. 9, 2018.
Prior Publication US 2022/0132367 A1, Apr. 28, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 28/04 (2009.01); H04L 1/1607 (2023.01); H04L 1/1812 (2023.01); H04L 1/1829 (2023.01); H04W 80/02 (2009.01); H04W 84/12 (2009.01)
CPC H04W 28/04 (2013.01) [H04L 1/1614 (2013.01); H04L 1/1812 (2013.01); H04L 1/1845 (2013.01); H04W 80/02 (2013.01); H04W 84/12 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of data retransmission in a wireless network, the method comprising:
transmitting a wireless packet comprising an aggregated MAC Protocol Data Unit (AMPDU) comprising a plurality of MAC Protocol Data Units (MPDUs) and codewords associated with the plurality of MPDUs, wherein the plurality of codewords comprises respective cyclic redundancy checks (CRCs);
receiving an acknowledgement from a receiver indicating failed MPDUs of the AMPDU that were received with error according to the respective CRCs, wherein the receiver stores log-likelihood ratios (LLRs) for codewords associated with the failed MPDUs; and
responsive to the acknowledgement, transmitting a set of codewords to the receiver for performing chase combining to resolve the MPDUs of the AMPDU, wherein the receiver chase combines the set of codewords with the plurality of codewords associated with the MPDUs using the stored LLRs to generate combined codewords, decodes the combined codewords to generate decoded codewords, and resolves the plurality of MPDUs of the AMPDU using the decoded codewords.