Random Multiple Access Probability Detection Function Control Of The Ad Hoc Network Protocol Analysis

Ad Hoc network is a self-organizing, adaptive network. It has broad application prospects in the military, civil, or commercial areas. At present, mobile Ad Hoc network technology has caused a great deal of attention worldwide. Between network nodes, whether the efficient and equitable allocation of shared wireless channel resources are controlled by the MAC protocol, so since the Ad Hoc network, MAC protocol has been an important area of research.In recent years, with the rapid development of wireless network technology, the growth of the number of users, the development of multi-service, this puts forward more requirements for network QoS. Through the analysis of random multiple access technology, multi-channel technology and Ad Hoc Networks technology, On this basis. This paper analyses a new Ad Hoc network protocol of Random Multiple Access and function of the probability detection Control for the point of view to improve Ad Hoc Networks multi-service QoS, enhance system reliability and realize load balancing.The basic theory of the protocol is:information packet transmission period TP is divided into the four parts. They are the information packet transmission time "1", the information packet transmission lag time "a ",the confirmation signal ACK transmission time " τACK ". and the confirmation signal ACK propagation delay time "a". Within a transmission period TP, Nodes of the new packet arrival use the probability of detection function value P(x) of continuous time-varying to continued listen for channel and use the1-P(x) to give up to listen for channel. Thus the protocol can dynamically control node continues to listen for the number of channels to make the control more flexible. At the same time, in the process of packet transmission, to increase the acknowledgment signal, the protocol achieves two-way handshake communication to increase the reliability of packet transmission. In the channel idle period, the packet arrival node sends packets with probability1. The protocol uses a multi-channel mechanism, and fixed channel assignment for Ad Hoc Networks through the division of business priorities based on the multi-channel business system to guarantee the QoS of the high priority business and the fairness and effectiveness of the systems.This paper uses the way of average cycle analysis to mathematical modeling and analysis for protocol. We obtain the mathematical expression of throughput of the system and the priority services such as network key performance indicators. In addition, we analysis the performance of the protocol through the computer simulation and combined with the experimental results.