Approximating the othercell interference distribution in inhomogeneous UMTS networks

We present an analytical model for computing the othercell interference distribution in a third generation UMTS network with inhomogeneous user distribution. Our proposed model is based on an iterative calculation of a fixed-point equation which describes the interdependence of the interference levels at neighboring base stations. Furthermore, we develop an efficient algorithm based on lognormal approximations to compute the mean and standard deviation of the othercell interference. We show that our model is accurate and fast enough to be used efficiently in the planning process of large UMTS networks.

[1]  Phuoc Tran-Gia,et al.  Spatial traffic estimation and characterization for mobile communication network design , 1998, IEEE J. Sel. Areas Commun..

[2]  Kumar N. Sivarajan,et al.  Capacity evaluation for CDMA cellular systems , 2001, Proceedings IEEE INFOCOM 2001. Conference on Computer Communications. Twentieth Annual Joint Conference of the IEEE Computer and Communications Society (Cat. No.01CH37213).

[3]  Antti Toskala,et al.  Wcdma for Umts , 2002 .

[4]  D. Stoyan,et al.  Fractals, random shapes and point fields : methods of geometrical statistics , 1996 .

[5]  Andrew Sendonaris,et al.  CDMA coverage, capacity and pole capacity , 1997, 1997 IEEE 47th Vehicular Technology Conference. Technology in Motion.

[6]  Kenji Leibnitz,et al.  An Approximation of Othercell Interference Distributions for UMTS Systems using Fixed-Point Equations , 2002 .

[7]  Andrew J. Viterbi,et al.  Other-cell interference in cellular power-controlled CDMA , 1994, IEEE Trans. Commun..

[8]  Andrew J. Viterbi,et al.  Erlang Capacity of a Power Controlled CDMA System , 1993, IEEE J. Sel. Areas Commun..

[9]  A. Stolyar,et al.  Closed-Form Expressions for Other-Cell Interference in Cellular CDMA , 1997 .

[10]  Phuoc Tran-Gia,et al.  Analytical characterization of the soft handover gain in UMTS , 2001, IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211).

[11]  D. Everitt,et al.  On the teletraffic capacity of CDMA cellular networks , 1999 .

[12]  J. Kaufman,et al.  Blocking in a Shared Resource Environment , 1981, IEEE Trans. Commun..