US 8,301,134 B2Granted

Main device of cordless telephone system

AssigneeBrother Kogyo Kabushiki Kaisha

InventorHideki Arimoto

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Abstract

There is provided a main device of a cordless telephone system that performs communication with at least one additional device, each of which includes a search unit that intermittently searches for a radio wave generated from the main device, and a search stopping unit that stops execution of the search unit after a state in which the search unit does not receive a radio wave continues for a predetermined time. The main device includes a radio wave generating unit, an operation stopping unit that stops an operation of the radio wave generating unit, and a temporary returning unit that temporality recovers the operation of the radio wave generating unit and stops the operation of the radio wave generating unit after the additional device executes multiple searches by using the search unit after stopping the operation of the radio wave generating unit, but before the predetermined time elapses.

Claims10

Dependent claims

A main device of a cordless telephone system configured to perform communication with at least one additional device, each of the at least one additional device comprising:

a search unit configured to search intermittently for a radio wave generated from the main device;
and
a search stopping unit configured to stop execution of the search unit after a state in which the search unit does not receive a radio wave continues for a predetermined time,
wherein the main device comprises:
a radio wave generating unit configured to generate the radio wave;
an operation stopping unit configured to stop an operation of the radio wave generating unit;
and
a temporary returning unit configured to recover temporarily the operation of the radio wave generating unit to generate a radio wave and configured to stop the operation of the radio wave generating unit after the at least one additional device executes multiple searches by using the search unit after stopping the operation of the radio wave generating unit, but before the predetermined time elapses, wherein the temporary returning unit comprises:
a recovery unit configured to recover the operation of the radio wave generating unit;
a judging unit configured to judge whether communication with the at least one additional device is established after the recovery of the operation by the recovery unit;
and
a re-stop unit configured to stop the operation of the radio wave generating unit under a condition that the judging unit judges that communication with all of the at least one additional device is established,
wherein the search unit is configured to execute searches a predetermined number of times within the predetermined time, and
wherein the temporary returning unit is configured to recover temporarily the operation of the radio wave generating unit to generate a radio wave while the at least one additional device executes a search corresponding to the predetermined number-th search, which is counted from the stoppage of the operation of the radio wave generating unit by the operation stopping unit or the re-stop unit, by using the search unit.

11 more elements

A main device of a cordless telephone system configured to perform communication with at least one additional device, each of the at least one additional device comprising:

a search unit configured to search intermittently for a radio wave generated from the main device;
and
a search stopping unit configured to stop execution of the search unit after a state in which the search unit does not receive a radio wave continues for a predetermined time,
the main device comprising:
a radio wave generating unit configured to generate the radio wave;
an operation stopping unit configured to stop an operation of the radio wave generating unit;
and
a temporary returning unit configured to recover temporarily the operation of the radio wave generating unit to generate a radio wave and stops the operation of the radio wave generating unit after the at least one additional device executes multiple searches by using the search unit after stopping the operation of the radio wave generating unit, but before the predetermined time elapses, wherein the temporary returning unit comprises:
a recovery unit configured to recover the operation of the radio wave generating unit;
a judging unit configured to judge whether communication with the at least one additional device is established after the recovery of the operation by the recovery unit;
and
a re-stop unit configured to stop the operation of the radio wave generating unit under a condition that the judging unit judges that communication with all of the at least one additional device is established;
a cycle determining unit configured to determine a recovery cycle corresponding to the predetermined time;
and
an additional device model type identifying unit configured to identify model types of the at least one additional device,
wherein the temporary returning unit is configured to recover the operation of the radio wave generating unit in the recovery cycle determined by the cycle determining unit, and
wherein the cycle determining unit is configured to determine a cycle shorter than a shortest time among predetermined times corresponding to the at least one additional device as the recovery cycle when the additional device model type identifying unit identifies that all the model types of the at least one additional device are known.

14 more elements

A cordless telephone system comprising:

a main device comprising:
a radio wave generating unit configured to generate a radio wave;
and
an operation stopping unit configured to stop an operation of the radio wave generating unit;
and
at least one additional device configured to connect with the main device via a wireless communication, the additional device comprising:
a search unit configured to search intermittently for the radio wave generated from the main device;
and
a search stopping unit configured to stop execution of the search unit after a state in which the search unit does not receive a radio wave continues for a predetermined time,
wherein the main device further comprises:
a temporary returning unit configured to recover temporarily the operation of the radio wave generating unit to generate a radio wave and configured to stop the operation of the radio wave generating unit after the at least one additional device executes multiple searches by using the search unit after stopping the operation of the radio wave generating unit, but before the predetermined time elapses wherein the temporary returning unit comprises:
a recovery unit configured to recover the operation of the radio wave generating unit;
a judging unit configured to judge whether communication with the at least one additional device is established after the recovery unit recovers the operation;
and
a re-stop unit configured to stop the operation of the radio wave generating unit under a condition that the judging unit judges that communication with all additional devices of the at least one additional device is established,
wherein the search unit of the at least one additional device is configured to execute one or more searches a predetermined number of times within the predetermined time, and
wherein the temporary returning unit is configured to recover temporarily the operation of the radio wave generating unit to generate a radio wave while the at least one additional device executes a search corresponding to the predetermined number-th search, which is counted from the stoppage of the operation of the radio wave generating unit by one or more of the operation stopping unit and the re-stop unit, by using the search unit.

14 more elements

Dependencies are inferred from the claim text.