Defining a Service Delivery Platform Architecture
using Generic IMS and SOA concepts
Rolan Christian and Hu Hanrahan
Centre for Telecommunications Access and Services∗
School of Electrical and Information Engineering
University of the Witwatersrand, Johannesburg, South Africa
Abstract – Currently, the telco network is evolving into a
Service Delivery Platform (SDP), that manages telco and In-
ternet/IT convergence. However, the SDP is a concept with no
standardised architecture. This paper defines a SDP architecture
and promotes its standardisation using technology neutral refer-
ence points. The architecture is founded on generic concepts
extracted from the telco-based IMS and Internet-based SOA.
Index Terms –Convergence, Standardisation, Architecture
Telco networks are complex systems with components
implemented using standardised architectures and tech-
nologies. Systems continuously evolve, by decompos-
ing infrastructure into standardised service and network
functional entities . Entities are structured within a
service platform architecture or network architecture. We
focus on service platform architectures.
Currently, the telco requires a service platform to man-
age telco/Internet/IT convergence. Presently, the telco
uses the IMS  and the Internet/IT community uses the
SOA  as convergence enablers.
The IMS uses SIP  as a call/session signalling pro-
tocol and defines functional entities and reference points
for both fixed and mobile telco networks. However, the
IMS lacks a complete service platform architecture.
The SOA is a service platform architecture, that ab-
stracts diverse system functions into services and inte-
grates services into applications. The SOA depends on
web service  technologies. Therefore, implementing
SOAs are restrictive.
Both IMS and SOA provide limited technology depen-
dent service platform architectures. So, what service plat-
form architecture is used to