Erlang Capacity for the Reverse Link of a IS-95 Cellular System According to Approximation Method in Shadowing Channel


The Transactions of the Korea Information Processing Society (1994 ~ 2000), Vol. 7, No. 10, pp. 3210-3217, Oct. 2000
10.3745/KIPSTE.2000.7.10.3210,   PDF Download:

Abstract

In a IS-95 cellular system, blocking will occur when the reverse link user interference power reaches a predetermined level which is set to maintain acceptable signal quality. In this paper, it is assumed that a mobile radio channel is a shadowing channel and Erlang capacity is calculated for the reverse link of an imperfect power controlled IS-95 cellular system. The blocking probability is derived using lognormal approximation and the results according to guassian and lognormal approximation method are compared and analyzed, respectively. Assuming that blocking probability is 1% at the data rate of Rb=9.6kbps and Rb=14.4kbps, it is shown that Erlang capacity using lognormal approximation is 13.68 Erlang and 7.08 Erlang and then the approximation error is occurred about 24.4% and 40.4% in the gaussian approximation, respectively. It is also observed that if the power control becomes perfect, the Erlang capacity is increased more 6.99 and 4.21 Erlang than that of the imperfect power control that the power control error is 2.5dB, and if voice activity is considered as 10%, the Erlang capacity is increased more 8.21 and 1.25 Erlang than that using non voice activity, respectively.


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Cite this article
[IEEE Style]
Y. Park and H. R. Kim, "Erlang Capacity for the Reverse Link of a IS-95 Cellular System According to Approximation Method in Shadowing Channel," The Transactions of the Korea Information Processing Society (1994 ~ 2000), vol. 7, no. 10, pp. 3210-3217, 2000. DOI: 10.3745/KIPSTE.2000.7.10.3210.

[ACM Style]
Young Park and Hang Rae Kim. 2000. Erlang Capacity for the Reverse Link of a IS-95 Cellular System According to Approximation Method in Shadowing Channel. The Transactions of the Korea Information Processing Society (1994 ~ 2000), 7, 10, (2000), 3210-3217. DOI: 10.3745/KIPSTE.2000.7.10.3210.