Abstract. This paper presents an open queueing model with blocking that enables us to determine the optimal fraction c * of the uplink channel capacity that should be dedicated to the contention channel in order to minimize the mean response time in a DOCSIS cable network. To assess the performance of this queueing network we make use of a decomposition technique. One of the key components of the model exists in capturing the behavior of the conflict resolution algorithm by means of a single processor sharing queue. The model is validated in three successive steps by means of several simulation programs. We also explore the impact of a variety of systems parameters, e.g., the number of cable modems, the initial backoff window size, etc. , on the optimum c * .
In REF is presented a model to determine the optimal fraction of the uplink subframe dedicated to contention in order to minimize the response time in DOCSIS (Data Over Cable Service Interface Specifications).
Dimensioning the Contention Channel of DOCSIS Cable Modem Networks
NETWORKING
Computer Science