US Patent No. 10,142,953

METHOD AND APPARATUS FOR PERFORMING SYNCHRONOUS HARQ OPERATION ACCORDING TO VARIABLE TTI ALLOCATION


Patent No. 10,142,953
Issue Date November 27, 2018
Title Method And Apparatus For Performing Synchronous Harq Operation According To Variable Tti Allocation
Inventorship Soojung Jung, Daejeon (KR)
Anseok Lee, Daejeon (KR)
Seungkwon Cho, Daejeon (KR)
Sung Cheol Chang, Daejeon (KR)
Assignee Electronics and Telecommunications Research Institute, Daejeon (KR)

Claim of US Patent No. 10,142,953

1. A method for performing a synchronous hybrid automatic repeat reQuest (HARQ), comprising:allocating a length of a transmission time interval (TTI) with variable size per HARQ process;
transmitting resource allocation information including a duration field corresponding to a length of a TTI allocated to each of the HARQ processes;
determining whether an HARQ error occurs at predetermined timing after the resource allocation information is transmitted; and
when the HARQ error occurs, handling the HARQ error,
wherein a new HARQ round trip time (RTT) for retransmission in a terminal is determined according to the length of the TTI corresponding to the duration field and then a transmission timing for next retransmission is determined according to the new HARQ RTT.