Title :
Optimal modulation and coding scheme selection in cellular networks with hybrid-ARQ error control
Author :
Kim, Dongwook ; Jung, Bang Chul ; Lee, Hanjin ; Sung, Dan Keun ; Yoon, Hyunsoo
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Korea Adv. Inst. of Sci. & Technol., Daejeon
fDate :
12/1/2008 12:00:00 AM
Abstract :
We propose an optimal modulation and coding scheme (MCS) selection criterion for maximizing user throughput in cellular networks. The proposed criterion adopts both the Chase combining and incremental redundancy based hybrid automatic repeat request (HARQ) mechanisms and it selects an MCS level that maximizes the expected throughput which is estimated by considering both the number of transmissions and successful decoding probability in HARQ operation. We also prove that the conventional MCS selection rule is not optimized with mathematical analysis. Through link-level and system-level simulations, we show that the proposed MCS selection criterion yields higher average cell throughput than the conventional MCS selection schemes for slowly varying channels.
Keywords :
automatic repeat request; cellular radio; decoding; error correction codes; mathematical analysis; modulation coding; Chase combining; average cell throughput; cellular networks; decoding probability; hybrid automatic repeat request mechanisms; hybrid-ARQ error control; incremental redundancy; mathematical analysis; optimal modulation and coding scheme; system-level simulations; through link-level; user throughput maximisation; Automatic repeat request; Decoding; Error correction; Land mobile radio cellular systems; Mathematical analysis; Modulation coding; Multiaccess communication; OFDM modulation; Redundancy; Throughput; (IR), OFDM, HSDPA.; Link adaptation (LA), hybrid automatic repeatrequest (HARQ), modulation and coding scheme (MCS), expected; throughput, Chase combining, incremental redundancy;
Journal_Title :
Wireless Communications, IEEE Transactions on
DOI :
10.1109/T-WC.2008.070950