An Intelligent Method to Control Overload in Multimedia Networks

Session initiation protocol (SIP) is the most important application layer protocol for multi-media applications.SIP is considered as a signaling protocol for IP multimedia subsystem (IMS) introduced by 3rd generation partnershipproject as signaling foundation in next generation networks (NGN). In this way, SIP should be able to respond to theneeds of such a largely-used network. One of the major problems in SIP networks is overload. Many methods have beenproposed to overcome overload in SIP, among which, multi-agent systems (MAS) are new agent-based and increasinglygrowing approaches. Since a distributed SIP network is a complex system composed of subsystems interacting witheach other, MAS is proposed for overload control in the SIP networks with each scale. In this paper, holonicorganization is applied to reduce the MAS complexity for modeling a large SIP network. Therefore, SIP network isdivided into geographical areas in which each holon controls an area. The entire network is controlled in hierarchicalstructure of holons. Hence, hierarchical structure is formed for holons. The overload control is achieved bycommunication and the knowledge exchange between the holons. Experimental results show that the Holonic-MASoverload control prevents overload in the SIP network while it causes increase whole throughput and reduce delay.

کلیدواژه ها:

Holonic Multi-Agent ، Overload Control ، SIP Network