关键词: Ad Hoc网络, 分布式牛顿算法, 跨层, 速率和功率控制

Abstract:

In recent years, with increasing demands for mobile services in different scenarios, no-center, distributed and self-organized Ad Hoc network has rapidly developed and plays a more and more important role in social life. However, how to design a reasonable and effective resource allocation scheme in Ad Hoc network is facing enormous challenge. This paper introduces the distributed Newton algorithm to solve the resource allocation problem. The main idea of the algorithm is to use the current local information to solve the primary and dual variables in each iterative process. By introducing energy consumption cost into the utility maximization function, and using the information from network layer, data link layer and physical layer, this paper proposes a cross layer design joint rate and power control in the utility maximization model. This method transforms the maximization problem of object function after modeling the Ad Hoc network into sub-problems in each different layer, workingout the minimum power and the maximum rate of the Ad Hoc network, that the minimum power under the maximum sending rate. The simulation result shows that the secondary convergence speed of the algorithm is fast. Cross layer optimization joint rate and power control can guarantee network utility maximization and reduce the node transmit power at the same time, thus effectively prolonging the network lifetime. The lower power communication can also enhance the communication security of the Ad Hoc network.

Key words: Ad Hoc network, distributed Newton algorithm, cross layer, rate and power control.