Research On Network Composite Of Composite Reconfigurable Wireless Communications System

Composite reconfigurable wireless communications system is an evolution solution of multi-standard heterogeneous wireless network toward future wireless mobile communications system. It is a solution of future wireless system based on Europe research. With multiple wireless access networks and multi-mode terminals, composite reconfigurable wireless communications system has its characters that can fulfil desired 4G performance than that of single wireless network technology evolution. This needs theory support. From the view of theory, mathematical models of composite reconfigurable wireless communications system are established. Based on the modeling, it was argued in this paper how to compose different wireless networks into composite reconfigurable wireless communications system. And architechture, vertical mobility and network control of composite reconfigurable wireless communication system were analysis in this article. This work is useful for future research on future wirelss communications. In this paper, main topics include:1. Analysis on background, origin of composite reconfigurable wireless communication system and concept of composite network system. In first chapter, from the character of 4G communications system and the evolution of composite reconfigurable wireless communications system, concept of composite netowrk is debated in detail at the first time. Concepts of network coexisting, network cooperating, network composite, network convergence are differentiated. New concept of composite network and reconfigurable terminal is given.2. Research on choosing wireless networks and system architecture of composite reconfigurable wireless communications system. Based on the research of Europe and character of various wireless networks, architecture of composite reconfigurable wirless communications system was presented in macro architecture, space architecture, logic architecture, signaling architecture in second chapter. Methods of composite different wireless networks were presented in this part.3. Research on network control of composite reconfigurable wireless communications system. It mainly concern on user access control and analysis on flow control. It needs new wireless radio resource management and new admission control that was different with that before because of character of composite reconfigurable wireless communications system. Addoped flow control algorithms, every controller just knows the state of backlog in queueing of nodes without knowledge of input rate, channel stastic or whole network topology. This algorithm reduced complex of system in system control.4. Analysis on vertical mobility of composite reconfigurable wireless communications system. Problem of vertical mobility is feature problem of composite reconfigurable wireless communications system. It related to vertical handoff scheme, vertical handoff signaling scheme, vertical handoff algorithms, etc. With three RATs, WCDMA, IEEE 802.16e and IEEE 802.11g chose as example, vertical handoff scheme, handoff signaling scheme were decribed. Two multiple criteria decision making algorithms were adopt for how to make decision in composite reconfigurable wireless communications system.5. Performance analysis on composite reconfigurable wireless communications system. Mathematics modeling is the solution for this problem.Applied queueing theory in this part, composite reconfigurable wireless communications system without vertical mobility was modeled as M/H₃/m/m queueing system, and composite reconfigurable wireless communications system with vertical mobility was modeled as M/ME/m/m queueing system. Mean system service time, system block probability are got by analysis.In final chapter of this paper, conclution and prospect are given.