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US 2010/0248728 A1Published application
User group-based adaptive soft frequency reuse method to mitigate downlink interference for wireless cellular networks
AssigneeIntel Corporation
InventorsHONGMEI SUN, Hua Yang, Shilpa Talwar, Nageen Himayat, Clark Chen
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Abstract
A novel soft fractional frequency reuse (FFR) technique is disclosed. The novel FFR technique includes reuse partition and power restriction, dynamic user grouping, channel quality indicator feedback based on reuse, and a user group-based interference aware scheduler. The FFR technique reduces co-channel interference for cell edge users.
Claims20
A method, comprising:
- partitioning a designated frequency band into a plurality of sub-bands, wherein each sub-band is assigned a reuse factor and a power level, wherein the frequency band is used for communication between a base station and one or more subscriber stations in a cellular network;
- splitting each cell in the cellular network into at least two groups based on a degree of satisfaction metric obtained from each subscriber station, wherein one of the groups is a cell edge user group;
- based on the at least two user groups, calculating a number of available resource units for each user group;
- and
- scheduling the cell edge user group before another user group of the at least two user groups using a best resource unit of the available number of resource units;
- wherein the interference to cells in the cell edge user group is mitigated.
3 more elements
A method, comprising:
- partitioning a designated frequency band into a first sub-band, a second sub-band, and a third sub-band, wherein each sub-band is assigned a reuse factor and a power level, wherein the frequency band is used for communication between a base station and one or more subscriber stations in a cellular network;
- assigning a plurality of subscriber stations in a cellular network as being in either a cell edge user group, a cell middle user group, and a cell center user group, based on the location of each subscriber station in a cell;
- notifying each subscriber station in the cellular network of the partition and assignment;
- and
- receiving from each subscriber station an amount of channel quality indicator feedback on each of the three sub-bands.
2 more elements
A method, comprising:
- partitioning a designated frequency band into a first sub-band, a second sub-band, and a third sub-band, wherein each sub-band is assigned a reuse factor and a power level, wherein the frequency band is used for communication between a base station and one or more subscriber stations in a cellular network;
- assigning a plurality of subscriber stations in a cellular network as being in either a cell edge user group, a cell middle user group, and a cell center user group, based on the location of each subscriber station in a cell;
- based on the grouping, calculating a number of available resource units for each user group;
- selecting a best subset of the available resource units;
- and
- assigning the best subset to the edge user group.
3 more elements
Dependencies are inferred from the claim text.