Title:
INTERFERENCE MANAGEMENT FOR DISTRIBUTED ANTENNA SYSTEMS
Document Type and Number:
WIPO Patent Application WO/2012/024122
Kind Code:
A3
Abstract:
A central base station for interference management in a distributed antenna system comprises a processor; a memory; and a frequency partition module configured to divide the remote radio heads into clusters and allocate a frequency band to each cluster. Multiple clusters use the same frequency band and groups of clusters are formed. A joint scheduler is configured, for each group, to activate at most two clusters at any given time and deactivate remaining clusters in the group, one of the at most two activated clusters being a serving cluster of the group, and to associate one or more users with the serving cluster in the group. An interference alignment module is configured to apply downlink interference alignment between the at most two activated clusters in each group to align transmit directions of all interferences between the at most two activated clusters.
Inventors:
GAO LONG (US)
ACHARYA JOYDEEP (US)
ACHARYA JOYDEEP (US)
Application Number:
PCT/US2011/047192
Publication Date:
May 24, 2012
Filing Date:
August 10, 2011
Export Citation:
Assignee:
HITACHI LTD (JP)
GAO LONG (US)
ACHARYA JOYDEEP (US)
GAO LONG (US)
ACHARYA JOYDEEP (US)
International Classes:
H04B7/04; H04B15/00; H04W16/02; H04W88/08
Foreign References:
| US20080205336A1 | 2008-08-28 | |||
| US20080212703A1 | 2008-09-04 | |||
| KR20090005793A | 2009-01-14 | |||
| US20100099451A1 | 2010-04-22 |
Other References:
See also references of EP 2606581A4
Attorney, Agent or Firm:
LEUNG, Chun-Pok et al. (PC1800 Diagonal Rd.,Suite 37, Alexandria VA, US)
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