Overload Control in SIP Networks: A Heuristic Approach Based on Mathematical Optimization
Abstract
The Session Initiation Protocol (SIP) is an application-layer control protocol for creating, modifying and terminating multimedia sessions. An open issue is the control of overload that occurs when a SIP server lacks sufficient CPU and memory resources to process all messages. We prove that the problem of overload control in SIP network with a set of n servers and limited resources is in the form of NP-hard. This paper proposes a Load-Balanced Call Admission Controller (LB-CAC), based on a heuristic mathematical model to determine an optimal resource allocation in such a way that maximizes call admission rates regarding the limited resources of the SIP servers. LB-CAC determines the optimal "call admission rates" and "signaling paths" for admitted calls along optimal allocation of CPU and memory resources of the SIP servers through a new linear programming model. This happens by acquiring some critical information of SIP servers. An assessment of the numerical and experimental results demonstrates the efficiency of the proposed method.
Keywords
Cite
@article{arxiv.1710.00817,
title = {Overload Control in SIP Networks: A Heuristic Approach Based on Mathematical Optimization},
author = {Ahmadreza Montazerolghaem and Mohammad Hossein Yaghmaee Moghaddam and Farzad Tashtarian},
journal= {arXiv preprint arXiv:1710.00817},
year = {2017}
}
Comments
arXiv admin note: substantial text overlap with arXiv:1709.10260