Managing evolution in telecommunication systems

Recent advances in telecommunication technology, including wireless networks and the Internet, along with the competition of network operators for offering advanced and different services, are putting increasing pressure for building telecommunication software systems that are adaptive to new requirements and easily reconfigurable, even in run time. We propose a new modelling primitive coordination contract - that we have developed and applied to other applications domains, as a means to provide an effective solution to this problem, We briefly describe coordination contracts and discuss how they can support the evolution of the specifications of the Wireless Application Protocol (WAP) Datagram layer.