Efficient Resource Subscribing Management Using Distributed Presence Information in Converged Networks

• Main Authors: Yi-Han Lin, 林義涵
• Other Authors: Jenq-Muh Hsu
• Format: Others
• Language: en_US
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/66169021004966542854

碩士 === 國立中正大學 === 資訊工程所 === 96 === Next-generation converged networks shall deliver many innovative services over the standardized SIP-based IMS signaling infrastructure. Such services exploit the joint presence information of a consumer, i.e. SIP entity requesting a service, and a vendor, i.e. SIP entity providing a service. This presence information is distributed across multiple presence servers. We propose a RLS-based Resource-Aware Query Routing scheme, called RLS-based RAQR, where each server obtains its neighbors’ utilization states notified from RLS. Compared to the RAQR without RLS, our RLS-based RAQR has better matches (achieve a 45% reduction in delay misses), thus demonstrating its suitability for the vicinity-based matching semantics required in Live Resource Finder pplication. Besides, our scheme is capable of minimizing message traffic between local presence server and its neighboring presence servers while maintaining full responsiveness for the resource subscribing management.