Thimma V. J. Ganesh Babu

Modeling and analysis of telecommunications networks

Preface. Retrieving Files from the Wiley FTP and Internet Sites. 1. Performance Evaluation in Telecommunications. 2. Probability and Random Processes Review. 3. Application of Birth and Death Processes to Queueing Theory. 4. Networks of Queues: Product Form Solution. 5. Markov Chains: Application to Multiplexing and Access. 6. The M/G/1 Queue: Imbedded Markov Chains. 7. Fluid Flow Analysis. 8. The Matrix Geometric Techniques. 9. Monte Carlo Simulation. Index.

Performance of a priority-based dynamic capacity allocation scheme for WATM systems

Performance of a priority-based dynamic capacity allocation suitable for WATM systems is presented. The scheduling of ATM cell transmission in each uplink TDMA frame is based on a priority scheme with priority given to real-time traffic over non-real-time traffic. Real-time traffic exceeding the uplink capacity is lost while non-real-time traffic that cannot be served is stored in a FIFO queue. An analytical model is developed to evaluate the cell loss ratio (CLR) of both real-time and non-real-time traffic. Aggregate voice, video and data traffic is modelled by three 2-state Markov-modulated Poisson processes (MMPPs). Analytical results for different system capacities and various traffic loads and scenarios are discussed.

Performance analysis of on-board switching in broadband satellite communication systems

We consider a method for studying the statistical multiplexing gain of an on-board switching broadband satellite communication system supporting multimedia services, which satisfies the QoS requirements at call level and burst level. The different types of calls such as voice, video, etc., originating from a particular uplink beam and destined to a particular downlink beam, arrive according to a Poisson process, and stay in the system for an exponentially distributed holding time. Each call admitted into the system, is assumed to require the uplink and downlink capacity units at the burst level, according to either single on-off source or composites of many mini-on-off sources. The burst blocking probabilities can be calculated, based on quasi-static approximation and recursion. Using this analysis, we examine the achievable statistical multiplexing gain of the on-board switch for given required QoS of the traffic types.

Performance evaluation of a wireless ATM switch using priority-based dynamic capacity allocation scheme

Performance analysis of a wireless ATM switching system using priority-based dynamic capacity allocation is presented. The system provides connectivity between a number of clusters of wireless ATM remote terminals. The scheduling of ATM cell transmission at each lint with TDMA frame is based on a priority scheme with priority given to real-time traffic over non-real-time traffic. Both types of traffic arriving at the downstream links are approximated by a 2-state Markov-modulated Poisson process (MMPP) in order to obtain analytical results. Illustrative results for two different traffic loads and at the output of 4/spl times/4 switch are discussed.