无线多跳网络快速跨层资源优化分配算法

针对背压路由算法容易造成大量队列积压和收敛速度慢的缺陷，该文研究了无线多跳网络中节点功率受限情况下的联合拥塞控制、路由和功率分配的跨层优化问题。以最大化网络效用为目标，以流平衡条件、功率等为约束条件建模，基于牛顿法提出了一种具有超线性收敛性能的算法，并运用矩阵分裂技术使该算法能够分布式实施。仿真结果表明，该算法在实现网络效用最大化的同时，能够有效提高网络中的能量效用，且能将网络中的队列长度稳定在一个较低水平，降低包传输延时。

A Fast Convergent Cross-layer Resource Optimization Allocation Algorithm in Wireless Multi-hop Networks

In order to improve the performance of the large queue backlogs and low convergence rate in back pressure routing algorithm, the cross-layer optimization of joint congestion control, multi-path routing and power allocation in wireless multi-hop networks is investigated. The system is modeled as a network utility maximization problem under the constraints of flow balancing condition and power. Based on the Newton’s method, the problem is solved and an algorithm with superlinear convergence speed is proposed. With matrix splitting technology, the algorithm can be implemented distributedly further. The simulation results show that the algorithm can effectively increase the energy utility while achieving the maximum network utility, and can keep the queue length at a very low level to decrease the packet transmission delay.