We propose a hybrid automatic repeat request (HARQ) message combining method for frequency division duplex (FDD)-based flexible duplex systems. Utilizing a link condition between the base station (BS) and the user equipment (UE) while combining HARQ messages can reduce the throughput performance degradation caused by HARQ message bundling, which is necessary when the number of HARQ messages exceeds that of resources to report them. We analyze the average throughput performance according to the number of HARQ messages associated with multiple HARQ feedback bits and propose an algorithm to obtain an optimal solution. Moreover, we show the superiority of the proposed algorithm by evaluating the average throughput performance and the computational complexity.
Bibliographical noteFunding Information:
Manuscript received January 29, 2019; revised April 15, 2019; accepted May 18, 2019. Date of publication May 23, 2019; date of current version October 11, 2019. This work was supported by Digital Media and Communications Research and Development Center, Samsung Electronics Company Ltd. under Grant IO 140227-01308-01. The associate editor coordinating the review of this paper and approving it for publication was S. De. (Corresponding author: Chungyong Lee.) The authors are with the School of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, South Korea (e-mail: firstname.lastname@example.org; email@example.com). Digital Object Identifier 10.1109/LWC.2019.2918515
© 2012 IEEE.
All Science Journal Classification (ASJC) codes
- Control and Systems Engineering
- Electrical and Electronic Engineering