Title :
A Threshold Optimizing Method Based on Markov in AMC Combined with HARQ
Author :
Huaping, Feng ; Chen, Fan ; Tingjie, Lv
Author_Institution :
Sch. of Econ. & Manage., Beijing Univ. of Posts & Telecommun.
Abstract :
A Markov based method for modulation and coding scheme (MCS) selection is proposed for pilot assistant adaptive modulation and coding scheme (AMC) with hybrid ARQ (HARQ) retransmissions. A first-order finite-state Markov model (FSMM) is introduced to represent the time correlation character of channel fading during (channel quality indicator) CQI feedback and HARQ retransmissions. According to different QoS target, such as maximize the air interface throughput or maintains a target frame error rate (FER) for each user. The Markov based method can deduce different reference pilot thresholds for each MCS. Theoretical analysis and link level simulation results both show the efficiency of the Markov based method for pilot threshold calculation according to different QoS target and different HARQ retransmission times
Keywords :
Markov processes; adaptive modulation; automatic repeat request; channel coding; fading channels; modulation coding; quality of service; radio links; QoS; adaptive modulation and coding scheme; channel quality indicator; fading channels; first-order finite-state Markov model; hybrid HARQ retransmission; link level simulation; target frame error rate; threshold optimizing method; time correlation character; Analytical models; Automatic repeat request; Delay; Error analysis; Fading; Feedback; Modulation coding; Multiaccess communication; Optimization methods; Throughput;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2006. WiCOM 2006.International Conference on
Conference_Location :
Wuhan
Print_ISBN :
1-4244-0517-3
DOI :
10.1109/WiCOM.2006.100
