Clasificación De Servicios

A new approach to classify and describe telecommunication services
A.Lehmann1,2, W.Fuhrmann3, U.Trick1, B.Ghita²
1

Research Group for Telecommunication Networks, University of Applied Sciences Frankfurt/M., Frankfurt/M., Germany 2 Centre for Security, Communications and Network Research, University of Plymouth, Plymouth, United Kingdom 3 University of Applied Sciences Darmstadt, Darmstadt,Germany E-mail: lehmann@e-technik.org

Abstract
Service composition, especially the reusability of distributed Internet Protocol (IP) multimedia services, will play a decisive role in future telecommunication networks. Therefore present classifications and specifications for telecommunication services have been researched. The summarised results clearly illustrate the insufficiency of describingservices from a consumer's view. So a new classification for telecommunication services is presented that will support customers to simplify the description of services. The aim of this approach is a simple specification and description language for reusable and distributed services which will support customers not only in describing services and service compositions. It should support customersto describe, find and use existing distributed telecommunication services.

Keywords
Multimedia, Value-added services, Service composition, Telecommunication

1. Introduction
Based on future networks, especially Next Generation Networks (NGN), and their service delivery platforms (SDP) the provision and composition of telecommunication services, also distributed telecommunication services,will be facilitated. In future customers will demand telecommunication services which will satisfy their requirements. To meet these increasing requirements, two of the critical steps are to implement the support for openness towards new services and to support the ability to describe services from a customer's view in future networks. This will lead to a number of challenges, such as classifyingand characterising telecommunication services that will support customers to simplify the description of service compositions. Therefore present classifications and specifications for telecommunication services have been researched and are presented in the next chapter. The summarised results clearly illustrate the insufficiency of describing services from a consumer's view. A new classificationfor telecommunication services is presented in chapter 3 that will support customers to simplify the description of services. The aim of this approach is a simple specification and description language for reusable and distributed services which will support customers not only in describing services and service compositions. It should support customers to

describe, find and use existingdistributed telecommunication services. Chapter 4 shows an example of a possible service description. Finally chapter 5 concludes the paper.

2. Existing definitions and classification models
Telecommunications (communications engineering) deals with capturing, processing, transmitting and storing information (communications). For this purpose telephony companies provide services (telecommunicationservices). The understanding of services differs in a broad range. The following lists different definitions and specifications for the notion of services in telecommunications.       Services are functional properties of the network which support a certain form of communication between sources and sinks (P. Kühn, 1991). A service is a set of goods or valuable functions offered by a serviceprovider to a customer (C. Abarca et al., 1997). An IP multimedia service is the user experience provided by one or more IP multimedia applications (ETSI TS 122.228, 2009). Services are made up of different service capability features (ETSI TS 122.105, 2008). A (Basic) telecommunication service is a term that is used as a common reference to both bearer services and teleservices (ETSI TS 122.105,...