SATNAC 2009 Conference Papers
The Intelligent IP Edge
Title: An Advanced Video Interactivity Framework for IPTV
Services
Authors: Lesang Dikgole (
Abstract: Research has highlighted a need for a comprehensive interactivity
framework for Internet Protocol Television (IPTV) services. Standardized IPTV
architectures do not adequately address this need. Current video access
techniques deployed over the Internet such as download and content-caching
techniques offer limited video interactivity functions. This paper presents an
advanced interactivity framework for IPTV services. The proposed framework is
designed over the IP Multimedia Subsystem (IMS) architecture. The IMS based
interactivity platform demonstrates that the advanced interactivity framework
can be implemented using standardized protocols such as SIP and RTSP over the
IMS based IPTV system.
Title: Service Brokering in IP Multimedia Subsystem
Authors: Asma
Elmangosh
(Higher
Abstract: The IP Multimedia Subsystem (IMS) has been
standardized as a Service Delivery Platform (SDP) positioned in the control
layer of the Next Generation Network (NGN) infrastructure. To meet the diverse
demands from NGN customers, it is effective to integrate different
technologies, such as telecommunication, mobile, and Internet to enrich offered
services. To integrate these domains the Service Oriented Architecture (SOA)
concept developed for enterprise networks, can be applied into the IMS
architecture. In this paper we overview the service control methods in
IMS, discuss the concept of using a Service Broker (SB) to control and
orchestrate service executions, and address some main issues of the integration
of the SB component in the IMS architecture.
Title: Service Outsourcing and Billing in Inter-domain IMS Scenarios
Authors: Vitalis Ozianyi (
Abstract: Resource sharing
in commercial mobile networks may present operators with options to cut costs
and prevent network churn. In resource sharing, when the network experiences
resource constraints, the operator would negotiate with other reachable
networks to outsource the provision of network access to users. The revenues
earned from user payments would be shared by the
home operator and the serving operator.
Operators participating in service outsourcing are faced with financial
challenges with regard to network resource sharing. Moreover, an operator’s users are
placed under service control of the visited operator, a situation that may
impact customer experience. On the other hand, the visited operator allocates
network resources to visiting users, thus there is a risk of service blockage
for home users. In this paper we explore resource sharing in inter-domain
frameworks, and investigate factors that influence revenue distribution amongst
involved operators. We develop strategies for use by operators to maximize
revenues from resource sharing. The work is done in the domain of IP Multimedia
Subsystem communications.
Title: Dynamic Service
Orchestration in the IP Multimedia Subsystem
Authors: Richard Spiers (
Abstract: Telecommunication
operators have begun moving to an all IP-based Next Generation Network (NGN) to
save costs as well as enabling the rapid development of new services. A NGN is
defined as a packet-based network where the service functionality is
independent of the underlying transport technologies. The IP Multimedia
Subsystem (IMS) is considered to be an intrinsic part of a NGN, and it provides
mechanisms such as user authentication, Quality of Service (QoS) and charging.
Traditionally, these mechanisms had to be created for each new service that the
network operator wished to offer. The ability to reuse these features greatly
speeds up the development of new services. This, together with the open
protocols being used for the control signalling, is predicted to create a vast increase
in the number of services being offered by the network operator as specialised
telephony knowledge is no longer needed to develop new services. This increase
in the number of potential services on offer has exacerbated the traditional
problem of service conflict detection and resolution. This paper describes the
current state of research in this area, discussing the advantages and
disadvantages of current systems, as well as proposing a novel design that aims
to address this issue.
Title: Mobicents as a Service Deployment Environment for OpenIMSCore
Authors: Mosiuoa
Tsietsi (Rhodes
University), Alfredo Terzoli (Rhodes
University), George Wells (Rhodes
University)
Abstract: The OpenIMSCore is a testbed environment that allows researchers to experiment with components of a Next Generation Network, providing open source implementations of the IP Multimedia Subsystem Call Session Control Functions, as well as a Home Subscriber Server. As a control platform for IP communications, IMS behaves as a docking station for multimedia services which can be developed using various programming languages. Open source implementations of certain multimedia servers do currently exist which are based on different programming platforms and have been used by developers to enhance their testbeds. However, there is a practical downside to a heterogeneous service deployment strategy that employs disparate communication services in an expanding testbed. In order to reduce time-to-market, a consistent service deployment environment is needed, which is comprehensive enough to deliver most of the services currently available, but in a unified manner. The Mobicents platform is a suitable candidate for this requirement, bundling a number of multimedia servers and possessing interfaces to several popular IP protocols, all within the context of a common JAIN SLEE standard-compliant infrastructure, allowing a more consistent service development and deployment experience for developers. This paper compares the various components of Mobicents with a few popular open source servers that have been used in conjunction with the OpenIMSCore, and shows the benefits of its use as a service deployment platform.