Wireless CATV/ATM - Architecture and modeling

This work presents a frame-structure, referred to as CATV/ATM, to serve as a wireless network architecture. The widespread CATV networks are attractive infrastructures for next generation wireless networks. Providing interactive broadband services over CATV networks is a major trend in communication and ATM (Asynchronous Transfer Mode) networks with broadband communication features well fitted to be the backbone of CATV networks. Based on the proposed network architecture, this work addresses and investigates the problems of call setup and handoff handling. When designing and configuring an ATM/based broadband CATV (B-CATV), it remains difficult to guarantee the quality of service (QoS) for different service classes, while still allowing enough statistical sharing of bandwidth so that the network is efficiently utilized. These two goals are often conflicting. Guaranteeing QoS requires traffic isolation, as well as allocation of enough network resources (e.g. buffer space and bandwidth) to each call. However, statistical bandwidth sharing means the network resources should be occupied on demand, leading to less traffic isolation and minimal resource allocation. For real-time applications the authors obtain maximum queuing delay and queue length, which are important in buffer design and virtual path (VP) routing. Future multimedia and Internet services will have more complex characteristics than traditional service types. Accurate planning of mobile networks requires accurate prediction of traffic flows, which involves complex relationships between the services themselves, the mobility of users and the business environment.