下一代网络中基于相邻资源的分布式过载控制机制研究.pdfVIP

Vo1.30No.3 第30 卷第3 期 电子与信息学报 Mar.2008 2008 年3 月 Journal of Electronics Information Technology 下一代网络中基于相邻资源的分布式过载控制机制研究 正开西 杨放春 (北京邮电大学网络与交换国家重点实验室 北京 100876) 摘 要:下一代网络(NGN)不问功能实体由于业务请求形成依赖关系，根据这种依赖关系和NGN 相对扁平体系结 构的特点，该文给出相邻资顿的概;念，查找过载点的相邻资橱，在相邻资源实施分布式过载控制.分析可以看 出， i我算怯能有效解决SIP 协议的分发功能和实施负载平衡带来的过载控制问题，问时尽可能早地拒绝业务请求， 提高网络的有被利用率，较好地满足ETSI TISPAN 对NGNj立棋按制定义的需求。 关键词:下…代网络:体系结构:过载控制t 相邻资源 中朋分吉隆号: TP393 文献标识码:A 文章编号: 1009-5896(2008)03-0690-05 Study on the Overload Control Mechanism ßased on the Adjacent Resourse in NGN Wang Kai-xi Yang Fang嗣chun (State K ey Labo11αto叩 01 Networking Switchíng Technoω础， Beijing University 01 Posts Telecommunications , Be伽9 100876, China) Abstract: The dependence is formed between different function entitiωdue， to service requωt. The ωnc叩tnamed adjacent r酬。urces is prop咄咄 according to the dependence and the NGN日 flatter architecture than the traditional telecommunication network. A distributed algorithm for overload control is prωented， which is bωedon the proposedωncept. It throttlωthe request at the logical adjacent resources. The algorithm can effectively h缸Idle with the overload control issuing from SIP fork or 1000 balance scenarios. The mechanism can improve the network effective throughput by throttling the service request 嗣 soon as pω日íble， which satisfies with the overloOO control requirements presented in the ETSI TISPAN draft. Key words: Next Gen暗ration Network (NGN)j Architec