Method of, and signalling system for, transferring data

Details Method of, and signalling system for, transferring data Method of, and signalling system for, transferring data

2005-11-08

2005-11-08

Maung, Nay (Department: 2684)

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

C455S009000, C455S343300, C455S041200

Reexamination Certificate

active

06963764

ABSTRACT:
A method of transferring data signals between a primary station (10) and secondary stations (SL1to SL5) of a master/slave radio network, comprises the primary station assigning the secondary stations to a plurality of categories (Z1, Z2). The primary station transmits beacon signals containing indications of those categories of the plurality for which it has data to be transferred. A secondary station operating in accordance with a wakeup sequence receives the beacon signals and determines if there is an indication of its category in a received beacon signal. If so, it transmits a request including an indication of its identity. The primary station checks to see if it has a data packet for the identified secondary station and, if it has, it transmits the data packet and, if not, it transmits a negative acknowledgement. Those secondary stations not participating in the exchange of messages can revert to a sleep mode thereby saving power.

REFERENCES:
patent: 5790946 (1998-08-01), Rotzoll
patent: 5862345 (1999-01-01), Okanoue et al.
patent: 6728244 (2004-04-01), Takabatake
patent: 6732144 (2004-05-01), Kizu et al.

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