A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : A SIP server event package for SIP server farm
Author(s) : T. Ma, et al.
Filename : draft-ma-sipping-server-event-package-00.txt
Pages : 15
Date : 2009-05-26
This document defines the Session Initiation Protocol (SIP) server
even package for SIP server farm using the SIP event framework. The
SIP server event package allows clients to subscribe to the
servers for server information in the server farm, and serves
to communicate information with each other. Based on this, an
overall view of the SIP server farm is built and delivered to the
entity (including SIP phone proxy or other SIP servers) which
subscribes and receives the event packages. The view would help
failover and load balancing in the server farm. The event
notification mechanism of SIP event framework guarantees its
adaption to the dynamic changes of server state. We instantiate
the usage of SIP server event package in three scenarios: client
based failover, DNS based failover, load balancer based load
balancing. To be added, we introduce some specific usage
in Peer-to-Peer SIP(P2PSIP) and service discovery to expand and
explore the potential usage space. Compared with the failover and
load balancing mechanisms in traditional SIP, the new SIP event
package would apply its explicit and dynamic notification mechanism
to improve the efficiency and service availability of SIP server
farm.
This mechanism using server event package can also be a complementary
way for the DNS functionality defined in RFC 3263[RFC 3263] to
locate SIP servers.
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