Combined Model for Outdoor to Indoor Radio Propagation

In this paper, a new model used to compute the outdoor to indoor signal strength emitted by a base station is presented. This model is based on the combination of 2 existing models: IRLA (Intelligent Ray Launching), a 3D geometric-like model especially optimized for outdoor predictions, and MR-FDPF (Multi Resolution Frequency Domain ParFlow), a 2D FDTD-like model initially implemented for indoor propagation. The combination of these models implies the conversion of the ray launching signals on the border of the buildings, into virtual source flows that will be used as an input for the indoor model. The performance of the new combined model is evaluated via measurements, and it appears to be an efficient solution for radio network planning, both in term of accuracy and computational cost.

[1]  Jie Zhang,et al.  Femtocells: Technologies and Deployment , 2010 .

[2]  Nik Bessis,et al.  A new approach to solve angular dispersion of discrete ray launching for urban scenarios , 2009, 2009 Loughborough Antennas & Propagation Conference.

[3]  F. Fuschini,et al.  Speed-Up Techniques for Ray Tracing Field Prediction Models , 2009, IEEE Transactions on Antennas and Propagation.

[4]  M. Thiel,et al.  3D-Wave Propagation Analysis of Indoor Wireless Channels Utilizing Hybrid Methods , 2009, IEEE Transactions on Antennas and Propagation.

[5]  Cyril Decroze,et al.  Outdoor to Indoor Channel Characterization by Simulations and Measurements for Optimising WiMAX Relay Network Deployment , 2009, VTC Spring 2009 - IEEE 69th Vehicular Technology Conference.

[6]  Lajos Nagy,et al.  Algorithmic complexity of FDTD and ray tracing method for indoor propagation modelling , 2009, 2009 3rd European Conference on Antennas and Propagation.

[7]  Jie Zhang,et al.  Applying FDTD to the Coverage Prediction of WiMAX Femtocells , 2009, EURASIP J. Wirel. Commun. Netw..

[8]  Katia Jaffrès-Runser,et al.  On predicting in-building WiFi coverage with a fast discrete approach , 2007 .

[9]  J.-M. Gorce,et al.  Deterministic Approach for Fast Simulations of Indoor Radio Wave Propagation , 2007, IEEE Transactions on Antennas and Propagation.

[10]  D.N. Schettino,et al.  Efficient Ray Tracing for Radio Channel Characterization of Urban Scenarios , 2007, IEEE Transactions on Magnetics.

[11]  Fredrik Tufvesson,et al.  A Cluster-Based Analysis of Outdoor-to-Indoor Office MIMO Measurements at 5.2 GHz , 2006, IEEE Vehicular Technology Conference.

[12]  M. Reynaud,et al.  Modeling indoor propagation using an indirect hybrid method combining the UTD and the FDTD methods , 2005, 7th European Conference on Wireless Technology, 2004..

[13]  Stavros Stavrou,et al.  Factors influencing outdoor to indoor radio wave propagation , 2003 .

[14]  Tokio Taga,et al.  Outdoor-to-indoor propagation modelling with the identification of path passing through wall openings , 2002, The 13th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications.

[15]  Thomas Kürner,et al.  Prediction of outdoor and outdoor-to-indoor coverage in urban areas at 1.8 GHz , 2002, IEEE J. Sel. Areas Commun..

[16]  Ying Wang,et al.  A hybrid technique based on combining ray tracing and FDTD methods for site-specific modeling of indoor radio wave propagation , 2000 .

[17]  F. De Flaviis,et al.  Indoor channel characterization for wireless communications using reduced finite difference time domain (R-FDTD) , 1999, Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324).

[18]  F.M. Landstorfer,et al.  Intelligent ray tracing-a new approach for field strength prediction in microcells , 1997, 1997 IEEE 47th Vehicular Technology Conference. Technology in Motion.

[19]  J. Kunisch,et al.  Multi-mode FDTD simulations of indoor propagation including antenna properties , 1995, 1995 IEEE 45th Vehicular Technology Conference. Countdown to the Wireless Twenty-First Century.