Research Article
An Effective Failure Recovery Mechanism for SIP/IMS Services
@INPROCEEDINGS{10.4108/eai.19-8-2015.2261247, author={Whai-En Chen and Li-Yao Tseng and Chien-Lung Chu}, title={An Effective Failure Recovery Mechanism for SIP/IMS Services}, proceedings={11th EAI International Conference on Heterogeneous Networking for Quality, Reliability, Security and Robustness}, publisher={IEEE}, proceedings_a={QSHINE}, year={2015}, month={9}, keywords={ims voip sip write-back write-through}, doi={10.4108/eai.19-8-2015.2261247} }- Whai-En Chen
Li-Yao Tseng
Chien-Lung Chu
Year: 2015
An Effective Failure Recovery Mechanism for SIP/IMS Services
QSHINE
IEEE
DOI: 10.4108/eai.19-8-2015.2261247
Abstract
There are many challenges to provide telecommunication services. The reliability is one of the most important challenges. Telecommunications systems require 99.999% reliability, which means that system only tolerant of downtime about 5 minutes per year. To achieve such high reliability, multiple servers and a shared database are deployed for a Session Initiation Protocol (SIP)/ IP Multimedia Subsystem (IMS) service. This paper investigates the effects of different database (DB) access mechanisms such as Write-Through (WT), Write-Back (WB), and the database-only (DB-only) mechanisms. Then this paper proposes an enhancement for the WB mechanism to improve the successful call setup probability. The analytic models are derived to analyze the performance of the proposed mechanism.