This paper presents a performance simulation analysis of several protocols proposed for implementation in a Cable TV Network. One of the protocols simulated is DQRAP (Distributed Queuing Random Access Protocol). DQRAP is a multiple access protocol with packet reservation scheme using contention mmislots. DQRAP requires that channel time be divided into slots, each of which consists of three mimslots used to schedule the transmission of packets followed by one data slot used to tranmait ~ t ~ and that stations maintain two common distributed queues (TQ -data transmission queueand RQ -resolution collision queue). Stations will follow DQRAP rules by txanmaitfing in the data slot and/or one of the minislots on the inbotmd dmnnel. Throughput and delay under various loads will be simulated. Performance results will demonstrate the superiority of DQRAP compared to other multiple access protocols in Cable TV networks. "Permission to make digital or hard copies of part or all of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice ,and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, to republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee." ,~ 1997 ACM 0-89791-850-9 97 0002 3.50
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