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A New Presence Lists Service in SIP Environment

  • Journal of The Korea Society of Computer and Information
  • Abbr : JKSCI
  • 2010, 15(12), pp.67-73
  • Publisher : The Korean Society Of Computer And Information
  • Research Area : Engineering > Computer Science

Jang,Choon-Seo 1

1금오공과대학교

Accredited

ABSTRACT

In SIP(Session Initiation Protocol) environment, the presence event notification operation makes presence service user to recognize presence information status changes of the other party. In conventional method, the user should send each SIP SUBSCRIBE message containing the address of the other party to the presence server. Furthermore each presence subscription requires refresh messages, and the amount of notification messages from the other party becomes large. These facts increases network traffic and the load of presence server. In this paper, to solve these problems a new presence list service has been suggested. It uses a presence list consists of URI of the other party and make it possible to subscribe by using one SUBSCRIBE message. So this method decreases the amount of SUBSCRIBE messages and refresh messages, and it also decreases the amount processing event notification messages from the subscribed the other party. And to increase the efficiency, a presence filtering method which enables to include some parts of selected presence information into the notification message body has been also suggested. The implemented system can reduce SIP message related network traffic and message processing time of the presence server. The performance of this proposed system has been evaluated by experiments ,and the results showed decreasing of server processing time.

Citation status

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