(queue) : often used in wireless communication system mechanism of automatic retransmission request (ARQ) to reduce the transmission in the process of packet error rate, now suppose phone includes three types of business: business data, multimedia and voice business, reliable data transmission business requirements (small package) by mistake, voice business requirement is time delay is small, multimedia business requirements of smaller time delay and high reliability (package by mistake and time delay control appropriate), if the total packets arrive in accordance with the "distribution, try to design a better queuing strategy to ARQ retransmission of three kinds of business, meet the transport needs of the three business, request to write programs for simulation and analysis of the ARQ performance of queuing strategy