Modeling the Hand-off Mechanism Effect on the In-Cell and Other-Cell Interference of IS-95 Cellular CDMA Networks

The reverse link in-cell and other-cell interference in power controlled cellular CDMA networks determine the reverse link capacity, and thus to a large extent the overall network capacity. A common modeling assumption is that a mobile is power controlled by a sector belonging to a set closest to it (minimum reverse link path-loss sense). However, in an actual IS-95-based system the mobile transmit power is controlled by that among the sectors in the active set, which requires the minimum transmit power to meet the reverse link FER requirement. Therefore, the power controlling sectors are not determined solely by reverse link path-loss, but also by system loading and forward link quantities. In this paper we model the reverse link in-cell and other-cell interference, jointly considering reverse link power control and the hand-off mechanism that defines the mobile’s active set. This more accurate modeling can lead to improved performance predictions for CDMA networks.