Mobile communication system, transmission mode switching...

Telecommunications – Transmitter and receiver at separate stations – With control signal

Reexamination Certificate

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Details

C455S068000, C455S067110, C455S067130, C455S522000, C370S252000, C375S222000

Reexamination Certificate

active

07050761

ABSTRACT:
To provide a mobile communication system capable of easily performing selection of an optimal transmission mode. Upon receiving a receiving error notice from a mobile station, a transmission mode switching selecting portion of a base station forwards an instruction to switch a transmission mode to a mode slower than a current transmission mode to a modulation/coding portion. After receiving the receiving error notice, if the receiving error notice is not continuously received for a predetermined number of blocks Ns, the transmission mode switching selecting portion forwards an instruction to switch a transmission mode to a mode faster than the current transmission mode to the modulation/coding portion. The modulation/coding portion switches the modulation/coding code to any one of a QPSK modulation/coding circuit, a 16QAM modulation/coding circuit and a 64QAM modulation/coding circuit in response to the switching instruction and performs modulation/coding in the circuit switched to.

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Japanese Office Action dated Jan. 6, 2004, with partial English translation.
Korean Office Action dated Mar. 12, 2004 with Japanese Translation.
Chinese Office Action dated Jun. 10, 2005 ( with English translation).

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