• 제목/요약/키워드: M/D/1/c queueing system

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Comments on "Optimal Utilization of a Cognitive Shared Channel with a Rechargeable Primary Source Node"

  • El Shafie, Ahmed;Salem, Ahmed Sultan
    • Journal of Communications and Networks
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    • 제17권3호
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    • pp.265-266
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    • 2015
  • In a recent paper [1], the authors investigated the maximum stable throughput region of a network composed of a rechargeable primary user and a secondary user plugged to a reliable power supply. The authors studied the cases of an infinite and a finite energy queue at the primary transmitter. However, the results of the finite case are incorrect. We show that under the proposed energy queue model (a decoupled M/D/1 queueing system with Bernoulli arrivals and the consumption of one energy packet per time slot), the energy queue capacity does not affect the stability region of the network.

서버 유휴 시의 고객 집단 도착과 서버 다운이 존재하는 M/G/1 모형의 분석 (M/G/1 queue with disasters and mass arrival when empty)

  • 김진동;양원석;채경철
    • 한국경영과학회:학술대회논문집
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    • 대한산업공학회/한국경영과학회 2002년도 춘계공동학술대회
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    • pp.841-844
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    • 2002
  • Recently there has been an increasing interest in queueing models with disasters. Upon arrival of a disaster, all the customers present are noshed out. Queueing models with disasters have been applied to the problems of failure recovery in many computer networks systems, database systems and telecommunication networks in this paper, we suffest the steady state and sojourn time distributions of the M/G/l model with disaster and mass alway when the system is empty.

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