Abstract. For the wireless channel characteristics, this paper modifies the cumulative ARQ in order to improve the performance of the traditional cumulative ARQ. We put in sequence confirmed feedback to satisfy the demands of the new generation cellular mobile communication. An analysis model is developed for parameter manipulation in the proposed framework, where an important performance metrics, goodput, is investigated. Finally, the simulation results show that the performance of modified cumulative ARQ is better than traditional mechanism.

An double SW-ARQ system model has been established for wireless communication in this paper. We analyzed the packet average delay for the system by an alternative method of retransmission, and recognize the packet's number in the buffer at receiver as the initial state of the system, the final state of the buffer reaches the channel's number by a limited times of retransmissions. For this complete transmission process, the packet average delay formula is obtained based on Markov state transition probability matrix, and make a comparative study how to control the optimal packet length to guarantee the largest throughput.