Transmission power level setting during channel assignment...

Details Transmission power level setting during channel assignment... Transmission power level setting during channel assignment...

2004-11-05

2011-11-29

Nguyen, David Q (Department: 2617)

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

C455S447000, C455S450000, C455S452200, C455S454000

Reexamination Certificate

active

08068845

ABSTRACT:
The present invention relates to a method for balancing the distribution of interference between radio cells in a wireless communication system comprising cells in which subcarrier blocks are used for communication. A number of adjacent cells build a cell cluster. Moreover, the present invention relates to a corresponding method adapted for use in a system in which multi beam antennas or multiple antennas are used. Furthermore, the present invention relates to base stations performing the above method as well as a communication system comprising the base stations. To reduce the large average SIR variations without causing additional SIR estimation, measurement and calculation problem as introduced with power control the invention suggests to group subcarrier blocks into a plurality of subcarrier block sets in each cell of a cell cluster, to determine transmission power levels for each of the cells of said cell cluster, and to assign transmission power levels to the subcarrier block sets.

REFERENCES:
patent: 5341397 (1994-08-01), Gudmundson
patent: 5579373 (1996-11-01), Jang
patent: 5649292 (1997-07-01), Doner
patent: 6047186 (2000-04-01), Yu et al.
patent: 7355960 (2008-04-01), Kang et al.
patent: 7412212 (2008-08-01), Hottinen
PCT International Search Report dated Feb. 18, 2005.
H. Rohling, et al.; “Performance of an OFDM-TDMA Mobile Communication System”, Institute of Telecommunications, Technical University Braunschweig, Braunschwieg, Germany, 1996, pp. 1589-1593.

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