每年出版 12 期
ISSN 打印: 0040-2508
ISSN 在线: 1943-6009
Indexed in
Allocation of the Optimal Number of Frequencies in the Cellular Communications Network using Simulation Results
摘要
During the process of the cellular communications network (CCN) design work, as rule, the optimal proportions of the frequencies to base stations (BS) can be analytically specified for the acceptable telephone traffic. In this case the probability of the signaling cansellation over the period of the haviest traffic is a normalized parameter in the calculations. Normally the frequency allocation and the BS sitting are performed concurrently, either the frequency procedure is to be arried out independently, but after the stage of the BS territorial sitting. Most of the methods for calculating the CCN frequency plan allow for the Erlang's formula for the no-repeat signaling systems. Meanwhile, under the real operating conditions of the CCN, i.e. the presence of repeated signaling, occasional duration of conversations, the availability of common ringing and access channels, the fading effects and signal overlapping in the radio channels, etc., the number of conversation channels, which cater for the network subscribers with a specified quality, may differ from the calculated one. In order to lock deeper into this particular issue the stochastic CCN models and the subscriber access (SA) to its resources have been elaborated. An experiment on the SA simulation has been made to determine the number of conversation channels (CC) at the BS for the high quality communications systems.
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