Techniques for interference mitigation in multi-tier communication system
AssigneeSamsung Electronics Co., Ltd.
InventorsYing LI, Baowei JI, Zhouyue PI, Jung Je SON, Sudhir Ramakrishna, Youngkyo BAEK
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Abstract
A method and a Mobile Station (MS), for use in a wireless communication network comprising a plurality of Base Stations (BSs) capable of communicating with a plurality of MSs, wherein at least some of the BSs are Femtocell BSs (FBSs) and at least some of the BSs are Macrocell BSs (MBSs), for mitigating interference are provided. The method includes detecting, by an MS, an interfering Closed Subscriber Group (CSG) FBS that the MS is not authorized to access, and transmitting, by the MS, a request for mitigation of interference.
Claims22
For use in a wireless communication network comprising a plurality of Base Stations (BSs) capable of communicating with a plurality of Mobile Stations (MSs), wherein at least some of the BSs are Femtocell BSs (FBSs) and at least some of the BSs are Macrocell BSs (MBSs), a method for mitigating interference, the method comprising:
- detecting, by an MS, an interfering Closed Subscriber Group (CSG) FBS that the MS is not authorized to access;
- and
- transmitting, by the MS, a request for mitigation of interference.
For use in a wireless communication network comprising a plurality of Base Stations (BSs) capable of communicating with a plurality of Mobile Stations (MSs), wherein at least some of the BSs are Femtocell BSs (FBSs) and at least some of the BSs are Macrocell BSs, a method for mitigating DownLink (DL) control channel interference, the method comprising:
- establishing, by an open access FBS, a first control channel in the same time-frequency resource as an MBS;
- and
- establishing, by a closed access FBS, a second control channel in a time-frequency resource different from the MBS.
A Mobile Station (MS) for use in a wireless communication network comprising a plurality of Base Stations (BSs) capable of communicating with the MS and other MSs, wherein at least some of the BSs are Femtocell BSs (FBSs) and at least some of the BSs are Macrocell BSs (MBSs), the MS comprising:
- a receiver for receiving signals from at least one of the BSs;
- a transmitter for transmitting signals to at least one of the BSs;
- and
- a controller for controlling the receiver and transmitter, for controlling detection of an interfering Closed Subscriber Group (CSG) FBS that the MS is not authorized to access, and for controlling transmission of a request for mitigation of interference.
A Femtocell Base Station (FBS) for use in a wireless communication network comprising a plurality of Base Stations (BSs) capable of communicating with a plurality of Mobile Stations (MSs), at least some of the BSs are Femtocell BSs (FBSs) and at least some of the BSs are Macrocell BSs (MBSs), the FBS comprising:
- a network transceiver for transceiving network signals;
- a receiver for receiving signals from at least one MS;
- a transmitter for transmitting signals to a least one MS;
- and
- a controller for controlling the network transceiver, receiver and transmitter, for controlling reception of a request for mitigation of interference, the request originating from an MS that is not authorized to access the FBS, and for controlling at least one of a reduction of transmission power and a communication with another network entity to cooperate on performing interference mitigation.
Dependencies are inferred from the claim text.