A Congestion Control and Multi-session Routing Algorithm in Coordinated Multi-point Wireless Communication Networks

• Main Authors: Li-Wen Fang, 方莉雯
• Other Authors: Yeong-Sung Lin
• Format: Others
• Language: en_US
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/88091250756142229191

碩士 === 國立臺灣大學 === 資訊管理學研究所 === 104 === Coordinated Multi-Point (CoMP) technology plays an important role in the heterogeneous wireless networks. It provides coordination and cooperation mutually between the base stations and mobile devices (MDs). The operators try to achieve high efficient and effective resource management to face the increasing number of MDs and the amount of data requirements under the limited resource constraints. A flow control mechanism is designed to solve resource insufficient problem. Furthermore, various types of application have diverse requirements of wireless network resources. Hence, this thesis tries to design a flow control with multi-session routing algorithm to handle resource allocation. This thesis considers a centralized management scheme in the heterogeneous wireless networks with the 4G base station, the fixed public AP and a back-end control center. The operator supports the flow control and routing selection, such as routing assignment through 4G network and Wi-Fi. The objective function is constructed as a mathematical model to obtain high revenue minus the penalty costs. Lagrangean Relaxation (LR) based method is proposed to optimize the objective value. The primal problem will be decomposed into several independent sub-problems by LR, Subgradient method, and the routing algorithm are proposed will be used jointly and repeatedly to get the approximate optimal solution quickly. The solution can be applied for operators in next generation wireless communication networks.