On level-dependent QBD processes with explosive state space
On level-dependent QBD processes with explosive state space
复制标题
具有爆炸状态空间的水平相关 QBD 过程
DOI:
10.1007/s11134-022-09796-1
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发表时间:
2022
期刊:
影响因子:
1.2
通讯作者:
T. Takine
中科院分区:
文献类型:
--
作者:
車塚 彩菜;矢島 萌子;三好 直人;三好 直人;三好 直人;豊泉 洋,三好 直人;T. Takine
3 Discussion In [1], a FIFO M/M/1 queue with exclusive positions for customers and forward moving delays is studied. 1 In this model, positions for customers are numbered from one to infinity and the customer in position 1 is served at rate μ. Let L (t) denote the system length, ie, the position occupied by the last customer at time t. When L (t)= l, customers arrive at rate λl and occupy position l+ 1. The customer in positionk (k= 2, 3,...) moves to positionk− 1 at rateγ only if positionk− 1 is vacant (ie, communication blocking). This model can be formulated as an LD-QBD-ESS process, ie, Ω0={∅}, Ω1={(1; 1)}, and Ωl={(l; 1, xl− 1); xl− 1∈{0, 1} l− 1}(l= 2, 3,...), where xl− 1=(xl− 1, xl− 2,..., x1). Note that (l; 1, xl− 1) represents the state that (i) the system length is l (and position l is occupied by the last customer) and (ii) the kth (k= 1, 2,..., l− 1) position is occupied by a customer if xk= 1 and otherwise, it is vacant. The stationary probability π (l; 1, xl− 1)(l= 1, 2,...) of state (l; 1, xl− 1) is given in a form [1]: π (l; 1)= π0 (λ0/μ) and π (l; 1, xl− 1)= π0 λ0 μ