Centralized-scheduling method and apparatus for inter-cell interference coordination in heterogeneous network
AssigneeSamsung Electronics Co., Ltd.
InventorsHeekwang Lee, Hojoong Kwon, Chungryul Chang, June Moon
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Abstract
A centralized scheduling method and apparatus is provided for minimizing inter-cell interference in the wireless communication system adopting femto-eNB-based service coverage expansion (range expansion). The method includes establishing, by a server, a connection with at least one base station, collecting channel information between the at least one base station connected to the server and terminals, determining interfering base stations causing interference to each terminal based on the channel information, and selecting the terminals to be scheduled in consideration of the interfering base stations.
Claims19
An inter-cell interference control method of a server in a heterogeneous network, the method comprising:
- establishing a connection with at least one base station;
- collecting channel information between the at least one base station connected to the server and at least one terminal;
- determining interfering base stations causing interference to each terminal based on the channel information;
- determining an interference base station set among the determined interfering base stations for stopping data transmission based on a number of an interference base station to be blanked and signal strength of the interfering base stations;
- selecting the terminal to be scheduled based on the interference base station set;
- expanding, when the at least one base station includes at least one of a micro base station and a macro base station, service coverage of the micro base station after establishing the connection;
- and
- performing, after collecting the channel information, a handover of the terminal having outage probability to the macro base station among the terminals located in the expanded service coverage of the micro base station.
An inter-cell interference canceling apparatus of a heterogeneous network, the apparatus comprising:
- a transceiver configured to establish a connection with at least one base station;
- and
- a controller configured to collect channel information between the at least one base station connected to the server and at least one terminal, determine interfering base stations causing interference to each terminal based on the channel information, determine an interference base station set among the determined interfering base stations for stopping data transmission based on a number of an interference base station to be blanked and signal strength of the interfering base stations, and select the terminal to be scheduled in consideration of the interfering base stations,
- wherein the at least one base station comprises at least one of a micro base station and a macro base station, and the controller is further configured to expand service coverage of the micro base station after establishing the connection and perform, after collecting the channel information, a handover of the terminal having an outage probability to the macro base station among the terminals located in the expanded service coverage of the micro base station.
Dependencies are inferred from the claim text.