Applying FDTD to the Coverage Prediction of WiMAX Femtocells
Femtocells, or home base stations, are a potential future solution for operators to increase indoor coverage and reduce network cost. In a real WiMAX femtocell deployment in residential areas covered by WiMAX macrocells, interference is very likely to occur both in the streets and certain indoor reg...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2009-01-01
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| Series: | EURASIP Journal on Wireless Communications and Networking |
| Online Access: | http://dx.doi.org/10.1155/2009/308606 |
| _version_ | 1818964690310529024 |
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| author | Alvaro Valcarce Guillaume De La Roche Álpar Jüttner David López-Pérez Jie Zhang |
| author_facet | Alvaro Valcarce Guillaume De La Roche Álpar Jüttner David López-Pérez Jie Zhang |
| author_sort | Alvaro Valcarce |
| collection | DOAJ |
| description | Femtocells, or home base stations, are a potential future solution for operators to increase indoor coverage and reduce network cost. In a real WiMAX femtocell deployment in residential areas covered by WiMAX macrocells, interference is very likely to occur both in the streets and certain indoor regions. Propagation models that take into account both the outdoor and indoor channel characteristics are thus necessary for the purpose of WiMAX network planning in the presence of femtocells. In this paper, the finite-difference time-domain (FDTD) method is adapted for the computation of radiowave propagation predictions at WiMAX frequencies. This model is particularly suitable for the study of hybrid indoor/outdoor scenarios and thus well adapted for the case of WiMAX femtocells in residential environments. Two optimization methods are proposed for the reduction of the FDTD simulation time: the reduction of the simulation frequency for problem simplification and a parallel graphics processing units (GPUs) implementation. The calibration of the model is then thoroughly described. First, the calibration of the absorbing boundary condition, necessary for proper coverage predictions, is presented. Then a calibration of the material parameters that minimizes the error function between simulation and real measurements is proposed. Finally, some mobile WiMAX system-level simulations that make use of the presented propagation model are presented to illustrate the applicability of the model for the study of femto- to macrointerference. |
| first_indexed | 2024-12-20T13:05:07Z |
| format | Article |
| id | doaj.art-c90e8612dde647a3875b752ab71b6d4f |
| institution | Directory Open Access Journal |
| issn | 1687-1472 1687-1499 |
| language | English |
| last_indexed | 2024-12-20T13:05:07Z |
| publishDate | 2009-01-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | EURASIP Journal on Wireless Communications and Networking |
| spelling | doaj.art-c90e8612dde647a3875b752ab71b6d4f2022-12-21T19:39:47ZengSpringerOpenEURASIP Journal on Wireless Communications and Networking1687-14721687-14992009-01-01200910.1155/2009/308606Applying FDTD to the Coverage Prediction of WiMAX FemtocellsAlvaro ValcarceGuillaume De La RocheÁlpar JüttnerDavid López-PérezJie ZhangFemtocells, or home base stations, are a potential future solution for operators to increase indoor coverage and reduce network cost. In a real WiMAX femtocell deployment in residential areas covered by WiMAX macrocells, interference is very likely to occur both in the streets and certain indoor regions. Propagation models that take into account both the outdoor and indoor channel characteristics are thus necessary for the purpose of WiMAX network planning in the presence of femtocells. In this paper, the finite-difference time-domain (FDTD) method is adapted for the computation of radiowave propagation predictions at WiMAX frequencies. This model is particularly suitable for the study of hybrid indoor/outdoor scenarios and thus well adapted for the case of WiMAX femtocells in residential environments. Two optimization methods are proposed for the reduction of the FDTD simulation time: the reduction of the simulation frequency for problem simplification and a parallel graphics processing units (GPUs) implementation. The calibration of the model is then thoroughly described. First, the calibration of the absorbing boundary condition, necessary for proper coverage predictions, is presented. Then a calibration of the material parameters that minimizes the error function between simulation and real measurements is proposed. Finally, some mobile WiMAX system-level simulations that make use of the presented propagation model are presented to illustrate the applicability of the model for the study of femto- to macrointerference.http://dx.doi.org/10.1155/2009/308606 |
| spellingShingle | Alvaro Valcarce Guillaume De La Roche Álpar Jüttner David López-Pérez Jie Zhang Applying FDTD to the Coverage Prediction of WiMAX Femtocells EURASIP Journal on Wireless Communications and Networking |
| title | Applying FDTD to the Coverage Prediction of WiMAX Femtocells |
| title_full | Applying FDTD to the Coverage Prediction of WiMAX Femtocells |
| title_fullStr | Applying FDTD to the Coverage Prediction of WiMAX Femtocells |
| title_full_unstemmed | Applying FDTD to the Coverage Prediction of WiMAX Femtocells |
| title_short | Applying FDTD to the Coverage Prediction of WiMAX Femtocells |
| title_sort | applying fdtd to the coverage prediction of wimax femtocells |
| url | http://dx.doi.org/10.1155/2009/308606 |
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