Utility-based emergency service and power control scheme in multi-hop WIFI/LTE heterogeneous networks

Yu Chen, Lin Zheng, Xiaoji Li
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Abstract

In recent years, integration and heterogeneous of network have become the two major characteristics of the future evolution about wireless communication. In this paper, multi-hop WIFI/LTE networks and dual-mode single communication mobile terminals, i.e. integral association, are considered in flat converged network. With the constraint of Quality of Service (QoS) for emergency service and load balance, a distributed optimization algorithms is constructed by jointing power control, vertical handoff and routing. More specifically, the framework model of network is represented by a generalized network utility maximization (NUM) problem. Furthermore, achieving utility maximization is proved to be NP-hard. Then, a generic framework is given to simplify the problem to arrive a distributed optimization algorithm. Simulation results show that the distributed algorithm can approach the optimal solution. Compared with greedy algorithm, the proposed one is able to improve the network utility on the basis of ensuring load balancing as much as possible.
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多跳WIFI/LTE异构网络中基于公用事业的应急服务与功率控制方案
近年来,网络的集成化和异构化已成为无线通信未来发展的两大特征。本文考虑平面融合网络中的多跳WIFI/LTE网络和双模单通信移动终端,即积分关联。以应急服务和负载均衡的服务质量(QoS)为约束,将功率控制、垂直切换和路由相结合,构建了分布式优化算法。更具体地说,网络的框架模型用广义网络效用最大化问题来表示。此外,实现效用最大化被证明是np困难的。然后,给出了一个通用框架,将问题简化为分布式优化算法。仿真结果表明,分布式算法可以逼近最优解。与贪心算法相比,该算法能够在尽可能保证负载均衡的基础上提高网络的利用率。
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