suryanasmilingdevil
2011-06-10, 11:51 PM
hy guys
this is a document about 1xEV-DO Femtocell Performance and Capacity Analysis
ABSTRACT
Femtocell is a miniature base station installed in subscriber’s residence and office for providing cellular service within the local home/office environment. Femtocells extend the coverage of an operator’s existing macro network and thereby improve a user’s voice and data experience. In addition, femtocells offload traffic from the macro network, which helps to solve the capacity crunch faced by operators due to exploding data demand on their macro networks. While femtocells improve a user’s coverage and throughput, they also cause interference to existing macro networks. Qualcomm has developed a suite of techniques to manage interference on both forward link (FL) and reverse link (RL) for robust performance in 1xEV-DO femtocell deployments. For example, algorithms for self-calibration of femtocell transmit power, autonomous carrier selection and PN offset selection are developed to mitigate FL interference issues. For the RL, adaptive attenuation algorithm is presented to handle large out-of-cell interference. An overview of these interference management techniques is provided in this paper. Performance of these techniques is analyzed using detailed system level simulations. Results show that in addition to coverage enhancements, significant capacity improvements are achieved when 1xEV-DO femtocells are deployed.
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tersenyumlah
this is a document about 1xEV-DO Femtocell Performance and Capacity Analysis
ABSTRACT
Femtocell is a miniature base station installed in subscriber’s residence and office for providing cellular service within the local home/office environment. Femtocells extend the coverage of an operator’s existing macro network and thereby improve a user’s voice and data experience. In addition, femtocells offload traffic from the macro network, which helps to solve the capacity crunch faced by operators due to exploding data demand on their macro networks. While femtocells improve a user’s coverage and throughput, they also cause interference to existing macro networks. Qualcomm has developed a suite of techniques to manage interference on both forward link (FL) and reverse link (RL) for robust performance in 1xEV-DO femtocell deployments. For example, algorithms for self-calibration of femtocell transmit power, autonomous carrier selection and PN offset selection are developed to mitigate FL interference issues. For the RL, adaptive attenuation algorithm is presented to handle large out-of-cell interference. An overview of these interference management techniques is provided in this paper. Performance of these techniques is analyzed using detailed system level simulations. Results show that in addition to coverage enhancements, significant capacity improvements are achieved when 1xEV-DO femtocells are deployed.
download via 4shared: 1xev-do-femtocell-performance-and-capacity-analysis.pdf - 4shared.com - document sharing - download (http://www.4shared.com/document/igfSWb8s/1xev-do-femtocell-performance-.html)
please add me a reputation if you like it
thanks you
tersenyumlah