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US 10,396,925 B2Granted
Small cell interference coordination method and wireless communication device
AssigneeSony Corporation
InventorsLiang Wu, Zaichen Zhang, Jian Dang, Yingying Yu, Weiwei Qin
Life of this patent
Estimating the term…
Abstract
A small cell interference coordination method and wireless communication device. The method includes: obtaining mobile information of at least one of the small cells; determining relative movement between the small cells according to at least the movement information; estimating a Doppler frequency shift of a signal between small cells according to the relative movement; and implementing an interference alignment policy between small cells according to the estimated Doppler frequency shift.
Claims13
A method for performing interference coordination between small cells, comprising:
- obtaining movement information on at least one of the small cells;
- determining a relative moving condition between the small cells at least based on the movement information;
- estimating a Doppler shift of a signal between the small cells based on the relative moving condition;
- and
- performing an interference alignment strategy between the small cells based on the estimated Doppler shift, wherein
- the interference alignment is performed by a method based on frequency shift, and
- the interference alignment performed by the method based on frequency shift comprises:
- in a case that, in frequency domain, subcarriers with first numbers of a transmission signal of a first small cell of the at least one of the small cells carry signals while subcarriers with the other numbers are set to carry no signal, performing a frequency shift on a transmission signal of a second small cell of the at least one small cells, so that, in frequency domain, subcarriers with the first numbers of a signal received by the first small cell from the second small cell carry no signals while subcarriers with the other numbers carry signals.
5 more elements
A wireless communication device, comprising:
- a processing circuitry configured to:
- obtain movement information on at least one of small cells in a macro cell;
- determine a relative moving condition between the small cells at least based on the movement information;
- estimate a Doppler shift of a signal between the small cells based on the relative moving condition;
- and
- trigger an interference alignment strategy to be performed between the small cells based on the estimated Doppler shift, wherein
- the interference alignment is performed based on frequency shift that comprises:
- in a case that, in frequency domain, subcarriers with first numbers of a transmission signal of a first small cell of the at least one of the small cells carry signals while subcarriers with the other numbers are set to carry no signal, the processing circuitry performs a frequency shift on a transmission signal of a second small cell of the at least one small cells, so that, in frequency domain, subcarriers with the first numbers of a signal received by the first small cell from the second small cell carry no signals while subcarriers with the other numbers carry signals.
5 more elements
A wireless communication device, comprising:
- a processing circuitry configured to:
- determine a relative moving condition between the present small cell and another small cell based on movement information on the present small cell and/or the other small cell;
- estimate a Doppler shift of a signal between the present small cell and the other small cell based on the relative moving condition;
- and
- perform interference alignment between the present small cell and the other small cell based on the estimated Doppler shift, wherein
- the interference alignment is performed based on frequency shift that comprises:
- in a case that, in frequency domain, subcarriers with first numbers of a transmission signal of a first small cell of the at least one of the small cells carry signals while subcarriers with the other numbers are set to carry no signal, the processing circuitry performs a frequency shift on a transmission signal of a second small cell of the at least one small cells, so that, in frequency domain, subcarriers with the first numbers of a signal received by the first small cell from the second small cell carry no signals while subcarriers with the other numbers carry signals.
4 more elements
Dependencies are inferred from the claim text.