Virtual Flows Allocation Algorithm in Collision Resistant Multiple Access

Collision Resistant Multiple Access (CRMA) to conduct multiple access problems is a new kind of spectrum shared protocol by the network coding. The virtual flow technology is the key technology of CRMA and contributes mostly to the high performance of the network. However, the efficiency of virtual flow technology drops with increase of physical flow caused by decoding failure and incomplete code. This paper proposes a virtual flow allocation algorithm, which not only self-adaptively curbs the number of real flows, but also increases the number of virtual flows of each physical flow, such that decoding failure declines and fully utilizes channel resources. The experimental results show that the virtual flow allocation algorithm can be more effective than virtual flow CRMA. The virtual flow allocation algorithm out-performs virtual flow technology by 30%-35%.