The Analysis On Transmitting End Delay Of Cooperative SR-ARQ Protocol Based On The Electromagnetic Wave Reflection

With the rapid development of wireless communication,the demand of transmitting broadband services in wireless communication networks is increasing.General diversity systems use single antenna user as a relay,forming a virtual multi-antenna arrays to achieve antenna diversity and resist fading of the wireless channel.In the traditional relay model,if the distance between the transmitting end and the receiving end is long,many relay nodes must be set up between the transmitting end and the receiving end to improve the correctly receiving probabi lity of the receiving end,therefore,in this case,it will consume large amounts of resources.To solve the above problem,this paper presents a cooperation diversity model based on reflection which uses the huge object as a relay node,saving a lot of resources.The transmission delay is not only an important parameter to measure network performance but also directly affect the flow control of the system packets in the wireless data communication system.This paper mainly studies the transmission end delay performance of the selective automatic repeat request(SR-ARQ)based on the reflection of the electromagnetic waves.Firstly,in this paper the object in the nature is used as the relay,the feedback delay of the system is assumed a fixed value,the radi o channel of this diversity system is modeled and analyzed,the finite-state Markov channel models are respectively built by using the selection combination and the maximal-ratio combination at the receiving end.Based on the queuing theory and the feature of the SR-ARQ protocol,the paper builds the end-to-end transmission queue model of the data packet,studies the stationary feedback delay and the Markov model for different delay on the basis of the feedback delay,and calculates the packet steady probab ility and delay probability distribution of the transmitting end using matrix geometric theory.This paper analyzes and simulates the delay performance of the transmitting end of the SR-ARQ protocol under the multiple delay value,the simulation results ve rify the accuracy of the model calculation.Calculation process,data and results of the transmitting end delay of the SR-ARQ protocol under the multiple delay value are all relatively accurate,fully reflecting the characteristics that the network delay i s random variable,providing a reliable method for computingthe delay of the data services in the wireless communication system.