Multiplex communications – Communication over free space – Combining or distributing information via time channels
Reexamination Certificate
2011-01-11
2011-01-11
Eng, George (Department: 2617)
Multiplex communications
Communication over free space
Combining or distributing information via time channels
C370S335000, C370S336000
Reexamination Certificate
active
07869416
ABSTRACT:
A method enables the use of a secondary pilot signal and a secondary antenna(s) in the forward link of a CDMA-based cellular network employing a slotted transmission scheme with a time-multiplexed primary pilot signal, with backwards compatibility. The forward link is divided into a number of time slots. For communications with “legacy” mobile stations that expect transmissions from a single, primary antenna (and that expect a single, primary pilot signal), during some of the time slots, only the primary antenna is used for transmissions, including transmitting the primary pilot signal. Neither the secondary pilot channel nor any other signals from the secondary antenna are transmitted. During the remaining time slots: (i) the primary pilot signal is transmitted from the primary antenna, and the secondary pilot signal is transmitted from the secondary antenna, but at different times; and (ii) data meant for the legacy mobile stations is not transmitted.
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Ramakrishna Sudhir
Rudrapatna Ashok N.
Alcatel-Lucent USA Inc.
Eng George
LaBruno David M.
Miller Brandon J
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