Selective combining of multiple non-synchronous...

Telecommunications – Transmitter and receiver at separate stations – Having measuring – testing – or monitoring of system or part

Reexamination Certificate

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C455S067130, C455S423000

Reexamination Certificate

active

07630691

ABSTRACT:
Techniques for selectively combining multiple transmissions to recover a message comprised of multiple frames. Initially, each transmission is separately processed to recover the message. If the message cannot be recovered error-free from any single transmission, then portions of multiple transmissions are selectively combined to recover the message. Erased frames in a message recovered from a primary transmission (e.g., the one with the best pilot Ec/I0) and good frames from other transmissions are determined (e.g., based on the frame-level CRC). One or more combined messages are then formed, each including a different set of good frames substituting for the erased frames. If a good frame cannot be derived from any single transmission for a given erased frame, then symbols from multiple transmissions may be combined to derive the good frame. Each combined message is checked (e.g., based on the message-level CRC) to determine whether it is good or erased.

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Casaccia et al., “Method and Apparatus for Radio Link Control of Signaling Messages and Short Message Data Services in a Communication System,” U.S. Publication No. 2003/0156599, Aug. 21, 2003.
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International Search Report-PCT/US03/001542, International Search Authority - European Patent Office-May 20, 2003.
International Preliminary Examination Report PCT/US03/001542 IPEA/US Aug. 30, 2004.

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