System and method for managing wireless base station handoff information
AssigneeAdaptix, Inc.
InventorsCheng Zhang, Heng Pan, Yanjun Yin
Life of this patent
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Abstract
The present invention is directed to a system and method which base stations send informational messages to neighbor base stations when conditions change, so that the neighbor base stations can update its database to keep itself current on the parameters (including availability, traffic load, modulation scheme, etc.) to use in effecting efficient base station to base station handoffs. In one embodiment, the receiving base station marks the time of the received message from a neighbor base station and if a new updated message is not received within a time window then the receiving base station assumes that there is a problem with that neighbor.
Claims17
A method for a wireless handoff from a serving base station to a target base station, said method comprising:
- receiving, at said serving base station, initial handoff parameters from a plurality of base stations, said plurality of base stations comprising said target base station;
- determining, at said serving base station, if said wireless handoff is required;
- selecting, at said serving base station, said target base station for said required wireless handoff;
- and
- setting a status flag for said target base station to inactive if said serving base station has not received updated handoff parameters from said target base station within a predetermined time after said receiving said initial handoff parameters.
A serving base station adapted to perform handoff of a wireless mobile device, said serving base station comprising:
- memory in said serving base station adapted for storing handoff parameters from a plurality of base stations, said plurality of base stations comprising a target base station;
- at least one processor in said serving base station adapted for determining if handoff is appropriate to said target base station;
- said at least one processor in said serving base station adapted for measuring time between receiving said stored handoff parameters from said target base station and receiving updated handoff parameters from said target base station;
- said at least one processor in said serving base station adapted for changing a status flag of said target base station to inactive if said measured time exceeds a time limit for receiving said updated handoff parameters from said target base station;
- said at least one processor in said serving base station adapted for controlling handoff to said target base station using said stored handoff parameters for said target base station and said status flag of said target base station;
- and
- a backbone network transmitter adapted for communication of at least one of said handoff parameters and said updated handoff parameters on a dedicated communication channel between said base station and said target base station.
A non-transitory computer readable medium containing program instructions for controlling certain aspects of a wireless communication base station, said program instructions comprising code for:
- controlling, at said wireless communication base station, receipt of updated working parameters of other base stations;
- storing, at said wireless communication base station, said received updated working parameters;
- determining, at said wireless communication base station, if a handoff is appropriate to one of said other base stations;
- and
- determining, at said wireless communication base station, based on the elapsed time between the receipt of said received updated working parameters, a status of a target base station.
A method for a wireless handoff from a serving base station to a target base station, said method comprising:
- receiving, at said serving base station, initial handoff parameters from a plurality of base stations, said plurality of base stations comprising said target base station;
- determining, at said serving base station, if said wireless handoff is required;
- selecting, at said serving base station, said target base station for said required wireless handoff;
- determining if said received handoff parameters from said target base station are valid for said required wireless handoff, said required handoff parameters including current traffic occupancy of said target base station;
- and
- if said received handoff parameters are determined to be valid, initiating said required wireless handoff to said target base station based on said received handoff parameters from said target base station.
A serving base station adapted to perform handoff of a wireless mobile device, said serving base station comprising:
- memory in said serving base station adapted for storing handoff parameters from a plurality of base stations, said plurality of base stations comprising a target base station, wherein said stored handoff parameters include current traffic occupancy of said target base station;
- at least one processor in said serving base station adapted for determining if handoff is appropriate to said target base station by verifying said stored handoff parameters;
- said at least one processor in said serving base station adapted for controlling handoff to said target base station using said stored handoff parameters for said target base station;
- and
- a backbone network transmitter adapted for communication of at least one of said handoff parameters and said updated handoff parameters on a dedicated communication channel between said base station and said target base station.
A non-transitory computer readable medium containing program instructions for controlling certain aspects of a wireless communication base station, said program instructions comprising code for:
- controlling, at said wireless communication base station, receipt of working parameters of other base stations;
- storing, at said wireless communication base station, said received working parameters;
- determining, at said wireless communication base station, if a handoff is appropriate to one of said other base stations based on verification of said received working parameters corresponding to said one of said other base stations, said working parameters corresponding to said one of said other base stations including current traffic occupancy of said one of said other base stations.
Dependencies are inferred from the claim text.