doi: 10.7763/IJCTE.2016.V8.1076
Priority-Based Queue Management Scheme to Reduce Overloads on SIP Servers
Tadasuke Nozoe
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- NTT Network Service Systems Laboratories, Nippon Telegraph and Tele
Abstract
If a session initiation protocol (SIP) server receives enough SIP messages to exceed its processing capacity, it goes into overload. When a SIP server receives new SIP messages under overload, the SIP message queue in the server lengthens, which may cause significant throughput degradation in the network. An overload control mechanism using the 503 response code is specified in the SIP standard to improve throughput in the event of such an overload. However, it is known that this is insufficient to control overloading in a large SIP network. In this paper we propose a queue management scheme at a SIP server to improve throughput and prevent overload propagation when overload occurs. In the proposed scheme, SIP messages are dropped based on a dropping probability that is calculated by prioritizing the items in the SIP queue. We also show the effectiveness of the proposed scheme by simulation experiments.
Keywords
- IMS
- overload control
- queue management
- SIP
How to Cite
Tadasuke Nozoe, Masahiko Noguchi, Minoru Sakuma, Kazuaki Misawa, and Mikio Isawa, "Priority-Based Queue Management Scheme to Reduce Overloads on SIP Servers," International Journal of Computer Theory and Engineering, vol. 8, no. 5, pp. 389-392, 2016. https://doi.org/10.7763/IJCTE.2016.V8.1076
Copyright & License
Copyright © 2016 by the authors. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).