Enhanced sleep mode in radiocommunication systems
AssigneeTelefonaktiebolaget LM Ericsson
InventorAlex K. Raith
Life of this patent
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Abstract
A method and system for providing an enhanced sleep mode for remote units in a radiocommunication system are described. Measurement periodicity for control channels of neighboring cells is optimized. Paging frame classes can also be temporarily modified to extend sleep periods.
Claims32
A method for evaluating a plurality of control channels in a radiocommunication system comprising the steps of:
- providing a default frequency of signal strength measurement for at least one of said plurality of control channels to be made by a remote station which is being served by a current control channel;
- reducing said default frequency of signal strength measurement for at least one of said plurality of control channels if said current control channel has been serving said remote station for greater than a predetermined time period;
- and
- scanning, at said remote station, said at least one of said plurality of control channels at said reduced default frequency signal strength measurement.
A method for evaluating a plurality of control channels in a radiocommunication system comprising the steps of:
- providing a default frequency of signal strength measurement for at least one of said plurality of control channels to be made by a remote station;
- reducing said default frequency of signal strength measurement for at least one of said plurality of control channels if a first change of an average received signal strength on a current serving control channel is less than a first predetermined threshold and if a second change of an average received signal strength on said plurality of control channels is less than a second predetermined threshold;
- and
- measuring, at said remote station, a signal strength of said at least one of said plurality of control channels at said reduced frequency of signal strength measurement.
A method for evaluating a plurality of control channels in a radiocommunication system comprising the steps of:
- providing a default frequency of signal strength measurement for at least one of said plurality of control channels to be made by a remote station;
- reducing said default frequency of signal strength measurement for at least one of said plurality of control channels if a change of a difference between an average received signal strength of a current serving control channel and one of said plurality of control channels is less than a predetermined threshold;
- and
- measuring, at said remote station, a signal strength of said at least one of said plurality of control channels at said reduced frequency of signal strength measurement.
A remote station comprising:
- a receiver for receiving, on a current control channel which is serving said remote stations, neighboring lists identifying other control channels;
- means for scanning said other control channels at a default scanning rate;
- and
- means for reducing said default scanning rate for at least one of said other control channels if said current control channel has been serving said remote station for greater than a predetermined time period.
A remote station comprising:
- a receiver for receiving, on a current control channel, neighboring lists identifying other control channels;
- means for scanning said other control channels at a default scanning rate;
- and
- means for reducing said default scanning rate for at least one of said other control channels if a change of an average received signal strength on said current control channel is less than a first predetermined threshold and if a change of an average received signal strength on said other control channels is less than a second predetermined threshold.
A remote station comprising:
- a receiver for receiving, on a current control channel, neighboring lists identifying other control channels;
- means for scanning said other control channels at a default scanning rate;
- and
- means for reducing said default scanning rate for at least one of said other control channels if a change of a difference between an average received signal strength of said current control channel and one of said plurality of control channels is less than a predetermined threshold.
A method for scanning a plurality of control channels by a remote station which is listening to a serving control channel comprising the steps of:
- providing a default scanning frequency for said plurality of control channels for use by said remote station;
- and
- if said serving control channel has been serving said remote station for greater than a predetermined period of time, then modifying said default scanning frequency for at least one of said plurality of control channels.
A method for scanning a plurality of control channels by a remote station which is listening to a serving control channel comprising the steps of:
- providing a default scanning frequency for said plurality of control channels;
- and
- if a change in an average received signal strength on said serving control channel is less than a predetermined threshold for a predetermined period of time, then modifying said default scanning frequency for at least one of said plurality of control channels.
A method for scanning a plurality of control channels by a remote station which is listening to a serving control channel comprising the steps of:
- providing a default scanning frequency for said plurality of control channels;
- and
- if a difference between a change in an average received signal strength on said serving control channel and a change in an average received signal strength on one of said plurality of control channels is less than a predetermined threshold for a predetermined period of time, then modifying said default scanning frequency for at least one of said plurality of control channels.
A method for scanning a plurality of control channels by a remote station which is listening to a serving control channel comprising the steps of:
- providing a default scanning frequency for said plurality of control channels;
- and
- if a change in a difference between an average received signal strength on said serving control channel and an average received signal strength on one of said plurality of control channels is less than a predetermined threshold for a predetermined period of time, then modifying said default scanning frequency for at least one of said plurality of control channels.
Dependencies are inferred from the claim text.