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US 7,680,457 B2Granted
Method and system for collaborated beamforming for reducing interference
AssigneeCisco Technology, Inc.
InventorsHang Jin, John Grabner
Life of this patent
Estimating the term…
Abstract
A method is provided for reducing interferences in a wireless communication system. First, in one or more cells, a plurality of frequency-time frames are generated each having at least one predetermined frequency-time open window unused for desired wireless communications. The interference information is derived from the predetermined open windows of the frames. The interference for incoming signals is reduced by calculating beamforming weights using the observed interference information.
Claims26
A method comprising:
- at a base station configured for wireless communication in a cell, receiving uplink communications arranged in a plurality of frequency-time frames, each frame having at least one predetermined frequency-time open window that is unused for desired wireless communications, wherein a size and position of the at least one predetermined frequency-time open window are varied across the plurality of frequency-time frames for an uplink communication;
- observing received signals occurring at the one or more predetermined open windows of the frames;
- determining existence of interference based on the presence of received signals at the predetermined open window of the frames and generating interference information based on the received signals at the predetermined open window;
- and
- calculating beamforming weights with respect to received desired signals using the interference information for reducing the interference with the desired signals.
2 more elements
A method comprising:
- at a base station configured for wireless communication in a cell, receiving uplink communications arranged in a plurality of frequency-time frames, each frame having one or more predetermined frequency-time open windows unused for desired wireless communications, wherein a size and position of the at least one predetermined frequency-time open window are varied across the plurality of frequency-time frames for an uplink communication;
- observing interference with respect to desired signals based on received signals during the predetermined open windows of the frames unused for the desired wireless communications;
- and
- determining beamforming weights based on the observed interference for reducing the interference with respect to the desired signals,
- wherein the frequency-time open windows are arranged in a pattern that is different in the cell from patterns used by a base station operating at least one neighboring cell.
2 more elements
Dependencies are inferred from the claim text.