Decentralized token-CSMA/CD protocol for integrated voice/data LANs

ticularly in office automation. The characteristics and In this paper we propose a decentralized protocol for requirements for their traffic is different I' 2. Data traffic integrated voice and data local area networks. This requires reliable delivery because one bit error may protocol is based on a hybrid token-CSMA/CD protocol destroy the whole message. However, voice traffic is which combines all the merits of the CSMA/CD network tolerant of some toss but requires real-time delivery. If and the token-passing network. We apply the hybrid both voice and data traffic is integrated into one network, protocol to voice and data individually, and offer two the interaction between them may seriously affect the implicit tokens, one voice token and one data token, to system behaviour. So, careful choice of a suitable I_AN for achieve the priorities requirements. The voice transintegrated services is very important. Many random mission follows the token-passing protocol with a access protocols for integrated services have been contention-resolution mechanism. It enforces a bounded proposed 3-6. These protocols have an unbounded delay delay to guarantee the real-time delivery for voice. This and variations of delay for delivery messages due to hybrid protocol will serve data ofthe low priority as fairly as excessive collisions. This phenomenon causes random best. To evaluate the protocol's performance, analytical access protocols not to be suitable for voice cornformulations are derived. Numerical results are obtained munications, but with the token-passing protocols, the for the throughput as well as the mean packet delay, channel access delay is bounded. This makes the token-