A distributed queue metropolitan area network for combined video, voice, wideband data and narrowband data

The authors examine a distributed queue metropolitan area network that serves video, voice, and wideband and narrowband data traffic. The protocol that is required for such combined services in the QPSX (queue packet and synchronous circuit exchange) network is proposed, and the performance of this protocol is computed. An integration scheme of the movable frame type is proposed to guarantee different types of services, a basic capacity plus a capacity on the demand. In light of the proposed protocol, the flexibility of the QPSX network was realized. The mathematical model of the proposed system is formulated, and the computation of the performance of a network example is derived. The results show the high capacity potential of such a network. It was found that the best priority scheme is the so-called restricted priority scheme