Resource Management Research In Heterogeneous Networks Based On Multi-Network Cooperation

With the growing demand of high speed and ubiquitous trend in mobile communication, multiple types of wireless telecommunication systems have been extensively researched, developed and deployed for different communication scenarios and various user requirements. Nowadays, several heterogeneous networks have been applied.3G network is starting to bloom, and evolving to4G network deployment while2G telecommunication system is already well-established. On the other hand, WLAN technology represented by IEEE802.11is proved to be a major success due to its distinctive technical features and definite market orientation.Inspecting the current situation in mobile communication network,2G network is undertaking heavy load due to the large base of subscribers while3G and WLAN are just at the stage of their blooming development with much less subscribers and low utilization. The deployment of LTE is speeding up, however, it will face similar load and utility situation with3G network in the near future. Considering the complementarity of different networks for different services, effective and cooperative resource management technology can reduce the burden of2G network and enhance the utilization of3G and WLAN network. This thesis addresses the task of resource management based on multi-network cooperative optimization from the following aspects.First, the optimization of single network including2G and3G is crucial. The Optimization of2G network can be realized through the joint effort of radio resource management and technology of self-organizing networks. Coverage optimization and network throughput enhancement are concerned in the optimization of3G network. In this thesis a carrier frequency level capacity planning scheme based on improved stochastic knapsack is proposed to cope with mobile operator’s lack of effective3G network planning tool. Furthermore, the network cooperation and optimization scheme under heterogeneous network environment consisting of2G,3G, WLAN and LTE is studied and deployed. Additionally, practical network operation consists of many typical scenarios such as the seamless interoperability between2G and3G networks, high-speed communication scenario. This thesis analyzes in detail the effective scheme for resource management in these special scenarios and provides feasibility analysis and validation. Finally, the conclusion of this thesis is presented; the further improvement of current scheme and the future research work are pointed out.