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US 2004/0166886 A1Published application
Pilot signals for use in multi-sector cells
AssigneeQUALCOMM Incorporated
InventorsRajiv Laroia, John L. Fan, Junyi Li
Life of this patent
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AssigneeQUALCOMM Incorporated
InventorsRajiv Laroia, John L. Fan, Junyi Li
Estimating the term…
Pilot signal transmission sequences and methods are described for use in a multi-sector cell. Pilots in different sectors are transmitted at different known power levels. In adjacent sectors a pilot is transmitted while no pilot is transmitted in the adjoining sector. This represents transmission of a NULL pilot signal. A cell NULL is also supported in which NULL pilots are transmitted in each sector of a cell at the same time. Multiple pilot signal measurements are made. At least two channel quality indicator values are generated from measurements corresponding to at least two pilot signals of different power levels. The two values are transmitted back to the base station which uses both values to determine the transmit power required to achieve a desired SNR at the wireless terminal. The wireless terminal also reports information indicating its location to a sector boundary.
A method of transmitting pilot tones in a multi-sector cell including at least a first sector and a second sector, the second sector being located adjacent said first sector, the method comprising:
A method of transmitting pilot signals in a multi-sector cell, the multi-sector cell including at least first, second and third sectors, each of the first, second and third sectors being located adjacent at least one other one of said first, second and third sectors in said cell, the method comprising:
An apparatus for transmitting pilot tones in a multi-sector cell, the apparatus comprising:
Dependencies are inferred from the claim text.