• Proceedings of the IEEK Conference
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• 1999.06a
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• pp.98-101
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• 1999

Proposed in this paper is an algorithm in which the maximum value of transmission delay due to collision during the reservation request minicell transmission in the uplink period is guaranteed for each traffic type in order to support real time multimedia traffic in wireless ATM environment. Also proposed is a scheme that uses minislots in which dynamic parameters can be transmitted without collision by using only 1-bit piggyback flag of each cell. Setting the piggyback flag is determined according to traffic characteristics and buffer length of each mobile terminal. It is shown that there has been a great improvement in performance of the proposed algorithm through performance analysis using simulation although the algorithm has little overhead.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.34 no.11B
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• pp.1142-1150
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• 2009

In this paper, we propose an novel bandwidth scheduling algorithm for the MAC protocol employed by the Data Over Cable Service Interface Specifications (DOCSIS) 3.0 compliant cable networks. The proposed algorithm statistically improves the chances of request piggybacking to minimize the access delay. It utilizes the piggyback request feature of the segment packets that has been newly specified in DCOSIS 3.0. In DOCSIS 3.0, a bandwidth request can be granted to several upstream channels within an upstream bonding group. The grant on each individual channel is treated as a segment packet. We find the optimal segment placement to minimize the access delay in the proposed algorithm. We also use a self-similar traffic model for simulation and analysis to evaluate the performance of the proposed algorithm.