Improving performance and reliability of an IMS network by co-locating IMS servers

SUMMARYThe services of next generation networks are envisioned to be potentially capable of seamless mobility in spite of the heterogeneity in underlying access technologies. It is undoubted that to accomplish seamless services across heterogeneous networking environments gets harder in case of simultaneous mobility. In this article, we propose a mobile-initiated network-executed (MINE) session initial protocol (SIP)-based handover mechanism to facilitate simultaneous mobility in IP multimedia subsystem over heterogeneous accesses. The novelty of the proposed approach is that no changes are required to the existing network infrastructure since handover decision is fully made by the mobile host (MH) and handover execution is performed by a new-added application server called mobility server (MS). When the MH decides to initiate a handover and obtains a new IP address, it will send a SIP Publish message to trigger the MS to carry out the handover execution. With the network-executed design of the MINE, the MS can perform third-party registration for security re-association and third-party call control for session re-establishment in parallel. Moreover, the Master-Slave Determination procedures derived from H.245 are used in the MS to handle fairly the racing conditions resulting from simultaneous mobility such that redundant message flows are eliminated. Mathematical analyses present that the MINE can shorten the handover latency and reduce power consumption, as observed from a comparison with the integrated solution of an optimized macro-mobility mechanism and a receiver-side simultaneous mobility approach.

show abstract

“…We use the following set of data, which comes from the Global System for Mobile Communications (GSM) world [36]:…”

Section: Handover Latencymentioning

confidence: 99%

Mobile‐initiated network‐executed SIP‐based handover in IMS over heterogeneous accesses

Chiang

Chang

2010

Int J Communication

View full text Add to dashboard Cite

show abstract

“…It is important to understand that the self-organizing IMS is different than P2P-SIP concept [12] where significant research results are available. Bessis [3] describes performance analysis and benefits of running multiple SIP servers on the same host. That paper shows how to design the IMS networks in order to maximize IMS server co-location and explains which types of SIP calls can benefit from the co-location of IMS servers.…”

Section: Related Workmentioning

confidence: 99%

Self organizing IP Multimedia Subsystem

Makaya¹,

Das²,

Chee³

et al. 2009

2009 IEEE International Conference on Internet Multimedia Services Architecture and Applications (IMSAA)

View full text Add to dashboard Cite

While there have been tremendous efforts to develop the architecture and protocols to support advanced Internet-based services over 3G and 4G networks, IMS is far from being deployed in wide scale. Effort to create an operator controlled signaling infrastructure using IP-based protocols has resulted in a large number of functional components and interactions among those components. Thus, the carriers are trying to explore alternative ways to deploy IMS that will allow them to manage their network in a cost effective manner while offering the value-added services. One of such approaches is self-organization of IMS. The self-organizing IMS can enable the IMS functional components and corresponding nodes to adapt them dynamically based on the features like network load, number of users and available system resources. This chapter introduces such a self-organizing and adaptive IMS architecture, describes the advanced functions and demonstrates the initial results from the prototype test-bed. In particular, we show how all IMS functional components can be merged and split among different nodes as the network demand and environment change without disrupting the ongoing sessions or calls. Although it is too early to conclude the effectiveness of self-organizing IMS, initial results

show abstract

“…Bessis [5] describes performance analysis and benefits of running multiple SIP servers on the same host. That paper shows how to design the IMS networks in order to maximize IMS server co-location and explains which types of SIP calls can benefit from the co-location of IMS servers.…”

Section: Introductionmentioning

confidence: 99%

Service continuity support in self-organizing IMS networks

Makaya¹,

Das²,

Chee³

et al. 2011

2011 2nd International Conference on Wireless Communication, Vehicular Technology, Information Theory and Aerospace &Amp; Elect

View full text Add to dashboard Cite

Abstract-With the increasing interest in deploying 4G/LTE networks, IMS has a potential to be deployed in a wide scale in order to support mobile Internet and value-added services over next-generation networks. Moreover, the effort to create an operator-controlled signaling infrastructure using IP-based protocols has resulted in a large number of functional components and interactions between core networks elements. Thus, the carriers are trying to explore alternative ways to deploy IMS that will allow them to manage their network in a cost effective manner while offering rich communications services. One of such approaches is self-organization of IMS (SOIMS). The self-organizing IMS can enable the IMS functional components to adapt dynamically based on the features like network load, number of users, node failures and available system resources. This paper proposes different mechanisms to handle self-organizing IMS with usage of load balancing paradigm. The proposed solution enables topology hiding, IMS nodes failure recovery, session continuity support, and IMS scalability.

show abstract

Improving performance and reliability of an IMS network by co-locating IMS servers

Cited by 19 publications

References 2 publications

Mobile‐initiated network‐executed SIP‐based handover in IMS over heterogeneous accesses

Mobile‐initiated network‐executed SIP‐based handover in IMS over heterogeneous accesses

Self organizing IP Multimedia Subsystem

Service continuity support in self-organizing IMS networks

Contact Info

Product

Resources

About