Browsing by Subject "ATM networks"

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    A framework for handling connectionless services in ATM networks
    (1997) Abdelati, Mohamed
    ATM networks, which are connection-oriented transport inediums, are well-suited to handle interactive and real-time applications such as telephony and video conferencing. However, they will be underutilized if used directly in aipplications characterized by sporadic behaivior and short service time requirements such as mail and file transfer. For such applications, in which the user information typically consists of a single block of data., connection-oriented services are inefficient due to connection establishment and teardown overhead. These applications are more efficiently handled by a connectioidess service which multiplexes data from individual applications into a pre-established virtual connection. In this work a method for providing connectionless services in ATM networks is proposed. This method is based on a pricing scheme which allocates the communication resources in a Pareto-optimal way that achieves maximum total surplus. The key idea, is to decompose the service provision procedure among three separate parties whose interactions are governed by a. set of competitive pricing mechanisms.
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    Markov modulated periodic arrival process offered to an ATM multiplexer
    (Elsevier BV * North-Holland, 1995-04) Akar, N.; Arıkan, E.
    When a superposition of on/off sources is offered to a deterministic server, we are faced with a particular queueing system, the analysis of which has a significant role in ATM networks. Periodic cell generation during active times is a major feature of these sources. We provide an analytical approach to solve for this queueing system via an approximation to the transient behavior of the nD/D/1 queue. The solution to the queue length distribution is given in terms of a solution to a linear differential equation with variable coefficients. The technique proposed here has close similarities with the fluid flow approximation and is amenable to extension for more complicated queueing systems with such correlated arrival processes. A numerical example for a packetized voice multiplexer is finally given to demonstrate our results.
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    A simulation study of forward error correction for lost packet recovery in B-ISDN/ATM
    (IEEE, 1993-05) Oğuz, Nihat Cem; Ayanoğlu, E.
    We present the results of a simulation study for a virtual circuit connection over an ATM network where forward error correction is performed at both the ATM cell level and the packet data unit (PDU) level. A main conclusion of this study is that at low loads ATM cells from the same source dominate in the switch buffers, while at high loads there is a mixing of ATM cells from different sources. For the latter case. ATM cell level coding performs better, while for the former, PDU level coding performs better. The combination of the two techniques has the best overall performance.