In this paper, we introduce a handoff scheme for data mobile cellular radio systems. A steady-stale traffic model is established and an analytical model of the system performance is presented. Average queue length and...
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In this paper, we introduce a handoff scheme for data mobile cellular radio systems. A steady-stale traffic model is established and an analytical model of the system performance is presented. Average queue length and transmission delay are evaluated. Although mobile users holding channels move from one cell to another, there is almost no packet loss except for the negligibly small blocking probability because a channel request can be transferred from the queue of one base station to another.
We propose and analyze a preemptive handoff scheme for an integrated real-time and non real-time service wireless mobile network. The total channels of each cell are divided into three parts, one is for real-time serv...
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We propose and analyze a preemptive handoff scheme for an integrated real-time and non real-time service wireless mobile network. The total channels of each cell are divided into three parts, one is for real-time service calls only, the second is for non real-time service calls only, and the last one is for overflowed handoff requests that can not be served in the first two parts. Out of third part, a few channels are reserved exclusively for the real-time handoffs service. To give the real-time service handoff requests higher priority over non-real-time service handoff requests, the real-time service handoff request is allowed to preempt the non-real-time service call when it finds no channel available on its arrival. The interrupted non-real-time service call returns back to the non-real-time service handoff request queue. The system is modeled by a multi-dimensional Markov chain and a numerical analysis is presented to estimate blocking probabilities of originating calls, forced termination probability of real-time service handoff requests calls, and average transmission delay of non-real-time service calls. This scheme is also simulated using extensive runs and both results are observed to agree fairly well. It is seen that the forced termination probability of real-time service calls is significantly reduced with our scheme while the probability of packet loss of non-real-time transmission is made to be negligibly small, as a non- real-time service handoff request can be transferred from the queue of current base station to another one.
A handoff scheme in integrated voice and data mobile cellular radio systems with priority reservation voice handoff procedure is proposed. A method of numerical analysis of the system performance is presented. Blockin...
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A handoff scheme in integrated voice and data mobile cellular radio systems with priority reservation voice handoff procedure is proposed. A method of numerical analysis of the system performance is presented. Blocking probabilities of originating voice and data calls, voice and data handoff requests, forced termination probability of voice handoff requests, and average length of voice and data handoff requests are evaluated. Forced termination probability of voice handoff request calls can be decreased by increasing the number of reserved channels. There is no packet loss for data users except for the negligibly small blocking probability because a data handoff request can be transferred from a queue of one base station to another.
We propose an analytical modeling for integrated voice/data wireless networks with priority reservation and preemptive priority procedures. In our scheme, calls are separated into three different classes: originating ...
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We propose an analytical modeling for integrated voice/data wireless networks with priority reservation and preemptive priority procedures. In our scheme, calls are separated into three different classes: originating calls (including originating voice and data calls), voice handoff and data handoff request calls. In the proposed scheme, there is a queue for data handoff request calls. Some channels in each cell are reserved exclusively for handoff request calls. Out of these channels, some are reserved exclusively for the voice handoff request calls. The remaining channels are shared by both the originating and handoff request calls. More priority is given to voice handoff request calls over the data handoff request calls. That is, the right to preempt the service of data is given to a voice handoff request call if on arrival it finds no free channels. The interrupted data call returns to the queue. The system is modeled by a three-dimensional Markov chain. A method of numerical analysis of the system performance is presented to estimate blocking probabilities of originating calls and forced termination probability of voice handoff requests calls.
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