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Generalized access control strategies for integrated services token passing systems

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3 Author(s)
Pang, J.W.M. ; Starlight Networks, Mountain View, CA, USA ; Tobagi, F.A. ; Boyd, S.

The demand for integrated services local area networks is increasing at a rapid pace with the advent of many new and exciting applications: office and factory automation, distributed computing, and multimedia communications. To support these new applications, it is imperative to integrate traffic with diverse statistical characteristics and differing delay requirements on the same network. An attractive approach for integrating traffic has been adopted in two token passing local area network standards, the IEEE 802.4 token bus standard and FDDI. The idea is to control the transmissions of each station based on a distributed timing algorithm, so as to achieve the following goals: (i) to limit the token cycles so that time-critical traffic can be accommodated, and (ii) to allocate pre-specified bandwidths to different stations when the network is overloaded. We have investigated the analysis and design of this protocol previously (see Pang and Tobagi, 1989). In this paper, we generalize the transmission control algorithm used with that protocol. The major advantages of the generalization over the original protocol are: (i) it provides a much expanded design space, (ii) it guarantees convergent behavior, and (iii) it gives meaningful insights into the dynamics of the basic control algorithm

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Communications, IEEE Transactions on  (Volume:42 ,  Issue: 8 )