Overload control in SIP signalling networks with redirect servers
by Kiran Kumar Guduru; Usha Jayadevappa
International Journal of Wireless and Mobile Computing (IJWMC), Vol. 19, No. 2, 2020

Abstract: Session Initiation Protocol (SIP) is the most popular IP-based application level signalling protocol used for managing multimedia sessions and chat sessions between two or more users. Expeditious growth in usage of smart phones spurred the usage of IP-based multimedia communications. Rapid growth in the usage of Internet Telephony is increasing the load on servers resulting in server overload. Overload control techniques for SIP servers were proposed and standardised; however, existing SIP signalling networks with redirect servers are not well equipped to handle overload conditions. This research work discusses the limitations of existing SIP overload control techniques when employing redirect servers and proposes a solution for controlling overload in downstream SIP servers when employing redirect servers. We propose an algorithm for controlling overload state and formulate the conditions for analysing the overload control parameters, based on queue lengths. Simulation studies revealed that retransmissions in the proposed system are reduced by 63.64% and that of throughput is increased by 27.39%. Call failure rate is reduced by 0.5%.

Online publication date: Thu, 08-Oct-2020

The full text of this article is only available to individual subscribers or to users at subscribing institutions.

 
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.

Pay per view:
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.

Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Wireless and Mobile Computing (IJWMC):
Login with your Inderscience username and password:

Username:        Password:          Forgotten your password?

Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.

If you still need assistance, please email subs@inderscience.com