Research on Critical Technologies for Synergistic Relay Link Layer in Wireless Communications

This paper studies the wireless resource management and scheduling of synergistic relay system link layer. In order to optimize power of collaborative communications relay node and make other wireless resources allocation rational, this paper use a single cell relay system as a model to study efficient optimal allocation and cooperation strategies of resource in relay system. First, this paper proposes a power allocation algorithm that is based on convex optimization theory, and the maximize system capacity of it is the objective function, this algorithm utilizes ellipsoid algorithm to solve this optimization problem, this method greatly improves the selection of step length of the sub-gradient and convergence stability. Second, combine the user access fairness factors and introduce improved analytic hierarchy process to OFDMA resource scheduling, propose a joint optimization objective function of system subcarrier allocation, power distribution, transmission mode selection and relay selection. Obtain every relay node fairness weight of the system by the analytic hierarchy process, schedule priority of a user according to the system fairness weighting coefficient values. This method makes the system fair access and spectrum utilization efficiency to do an effective compromise.