水声无线传感网中延迟敏感应用的跨层方案

Cross-layer Scheme for Delay-sensitive Applications in Underwater Acoustic Wireless Sensor Networks

在能量受限的水声无线传感网络中,为了满足不同业务的通信质量,提出了一个分布式的跨层方案,综合考虑传输层、网络层、物理层因素,延迟容忍的用户在传输层进行流量控制,并根据当前信道状态和网络层队列,通过Lyapunov优化和发射功率控制来进行资源分配,以保持整个网络队列稳定,满足网络公平性.仿真结果表明,此方案在满足延迟敏感用户服务质量(QoS)的同时,能够最大化延迟容忍用户的数量.

For purposes of satisfying the quality of service requirement of different types of services in underwater wireless acoustic sensor networks with limited energy,a distributed cross layer scheme combined with flow control and resources allocation is proposed.By considering effect factors among transfer layer,network layer,and physics layer,delay tolerant users process the resources allocation through Lyapunov optimization and power control in order to keep the network stable and satisfy the fairness.Simulation results demonstrate that this scheme not only meets requirements of delay sensitive users,but also maximizes the number of delay tolerant users.