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Improve UMTS/HSDPA network efficiency

Posted: 16 Oct 2009 ?? ?Print Version ?Bookmark and Share

Keywords:UMTS HSDPA network? network efficiency? network architecture?

UMTS and HSDPA are the preferred services in many markets. However, challenges with interference and isolation among the RF cells are reducing bandwidth and coverage in dense areas and inside buildings. This article proposes a supplemental UMTS/HSDPA network architecture that cost-effectively improves service by increasing isolation to reduce interference, while increasing data speed bandwidth and coverage. The architecture improves network efficiency while reducing mobile operator production costs.

UMTS and HSDPA are noise-sensitive systems. The data speed delivered is directly related to SNR. Every cell in a UMTS/HSDPA network use the same frequency, and signals from different cells overlap, collide and interfere with one another. This interference is due to a lack of cell isolation. This phenomenon reduces data speeds and decreases network capacity since it causes inter-cell interference in the overlapping areas.

The overlap issue impacts mobile operators' ability to deliver service in urban core areas and inside buildings, where broadband users rely on the service most. Subscribers opt for UMTS/HSDPA to gain the benefits of high-speed broadband. Unfortunately, the lack of isolation limits network bandwidth in densely populated areas.

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