Service zone switching method based on load considering inter-cell interference in 802.16/WIBRO systems
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United States of America Patent
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Nov 27, 2012
Grant Date -
Nov 12, 2009
app pub date -
May 6, 2009
filing date -
May 6, 2008
priority date (Note) -
Expired
status (Latency Note)
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Abstract
There is provided a method of switching a zone through which services are provided to subscriber stations (SS) in an environment using an FRF-1 zone and an FRF-3 zone based on traffic load of each zone in order to reduce the inter-cell interference in 802.16/WiBro systems. The service zone switching method based on load considering inter-cell interference in 802.16/WiBro systems may be useful to minimize the inter-cell interference, enhance the capacity of cells and improve users' transmission quality in the cells by determining whether the services are provided through one out of an FRF-1 zone (a zone where users in 3 sectors of one cell can use all subchannels) and an FRF-3 zone (a zone where users in each of 3 sectors of one cell can use one third of all subchannels; 3 sectors of one cell use 3 channel group, respectively), which are present in one frame, based on the distribution and traffic load of subscriber stations (SS) present in one cell, which consists of 3 sector units, under the environment of the 802.16/WiBro systems, and providing services through the selected zone.
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