The Call Admission Control (CAC) optimizes the use of allocated channels against offered traffic maintaining the required Quality of Service (QoS). Provisioning QoS to user at cell-edge is a challenge where there is limitation in cell resources due to Inter-Cell Interference (ICI). Soft Frequency Reuse is ICI mitigation scheme that controls the distribution of resources between users. In this paper, the Impact of four CAC schemes (Cutoff Priority scheme (CP), Uniform Fractional Guard Channel (UFGC), Limited Fractional Guard Channel (LFGC), New Call Bounding (NCB) scheme) at cell-edge have investigated using queuing analysis in a comparative manner.
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