H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 7/26 (2006.01) H04Q 7/12 (2006.01) H04M 11/02 (2006.01)
Patent
CA 2061697
After bit synchronization and frame synchronization are established in accordance with a transmission signal from a transmission office, reception RX is stopped until a reception timing assigned to a group of a portable radio unit comes. A receiving operation is performed again at the reception timing assigned to the group of the unit. If the ID code of the received signal coincides with the ID of the unit, an informing operation is performed. At the same time, transmission TX is performed. A transmitting operation is performed during a transmission signal stop period TXOF upon completion of transmission of data corresponding to all the eight groups. The transmission timing of the portable radio unit is based on the fact that frame synchronization is established in the reception RX, so that transmission TX is performed at a timing assigned to the group of the unit in the reception RX. The above-described timings prevent the transmission office and the portable radio unit from performing simultaneous transmission.
Corporation Nec
Smart & Biggar
LandOfFree
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