文档介绍：异构网络接入选择算法的设计异构网络接入选择算法的设计 1 异构网络接入选择算法的设计摘要随着网络技术与通信建设的发展和通信管理体制改革的进一步加深,通信网络管理系统将进一步优化、完善,并逐步形成完整的综合管理系统,实现通信网络运行全时受控性综合管理,保证通信网络稳定、可靠、高效运行。为了使通信网络能够在适应的场合提供给用户满意的服务,异构网络融合具备必要性,如果要实现网络融合,关键技术之一就是垂直切换。如UMTS 与WLAN 在网络融合时, 要保证无缝的垂直切换,对用户而言,既保证了用户的高速、大容量服务体验, 又解决了 WLAN 覆盖区域效的问题。本文主要讨论了异构网络融合过程中的垂直切换技术,通过构建代价函数, 比较代价参数的大小和接受信号强度的满足条件来选择网络接入方式,本文的只要目的就是证明网络融合的必要性和垂直切换的可行性。关键词: 异构;垂直切换;融合;网络异构网络接入选择算法的设计 2 Abstract With the further deepening work management technology, communication construction of large-scale development munication management system, work management system will be further optimized, improve, and gradually formed prehensive management plete, realize work running full time controlled integrated management, ensure work is stable and reliable, efficient operation. A solid foundation for the realization work, prehensive scientific, intelligent management, integration of work es the important breakthrough, and to achieve one of the key technologies of fusion is the vertical handoff problem, such as UMTS and WLAN in work convergence, to ensure a seamless vertical handoff, for users, not only guarantee the high speed, large capacity service user experience, but also solves the problem of the WLAN coverage area. This paper mainly discusses the integration of work Vertical Handoff Technology in process of construction, the cost function, comparative cost parameters and the size of the received signal strength to meet the conditions to choose work access, as long as the vertical the necessity and purpose is to prove that the feasibility of direct work. Keywords : work; vertical handoff; fusion; 异构网络接入选择算法的设计 3 引言无线通信系统也经历了从 1G到3G再到未来 4G的进化过程,这段发展历程证明一个事实:融合技术的发展的建立在客户对业务的需求上的。随着通信技术的逐步发展,各种网络之间为了服务需要,为了满足客户需求,网络融合已经注定成为必然趋势,这将会为未来移动行业的发展奠定基础。通信系统在不断的发展,异构网络也越来越需要融合,网络融合的技术也被越来越多的人开始讨论,人们开始理解无线通信的未来发展趋势,不再只是一种技术统一天下,就未来的网络融合技术中而言,不可能出现某一种特别先进的技术来取代其多种无线网络相互融合而产生具备多种服务方式和质量需求的异构融合网络。所以未来无线通信网,则将朝向宽带化、泛在化、全 IP方向发展。异构网络接入选择算法的设计 4 1绪论课题背景近年来随着信息网络技术的飞速发展,各种无线网络如