Methods and apparatus for performing handoff based on the mobility of a subscriber station
DCFirst Claim
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1. A method of handoff in a wireless system having a base station that communicates with a subscriber station, the method comprising:
- establishing, at the base station, a service with the subscriber station in a licensed spectrum;
determining, at the base station, a first value of a mobility factor indicative of a relative motion of the subscriber station;
transferring, at the base station, the service from the licensed spectrum to a non-licensed spectrum associated with the base station if the first value of the mobility factor indicates that the subscriber station has been in a low mobility state for at least a predetermined period of time.
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Abstract
In a wireless communication system, a mobility factor is used to influence handoff. If a subscriber station has been in a low mobility state for some period of time, the system may handoff operation from a first service type to a second service type. If the mobility factor indicates that the subscriber station is moving, the system may handoff operation from the second service type back to the first service type.
35 Citations
18 Claims
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1. A method of handoff in a wireless system having a base station that communicates with a subscriber station, the method comprising:
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establishing, at the base station, a service with the subscriber station in a licensed spectrum; determining, at the base station, a first value of a mobility factor indicative of a relative motion of the subscriber station; transferring, at the base station, the service from the licensed spectrum to a non-licensed spectrum associated with the base station if the first value of the mobility factor indicates that the subscriber station has been in a low mobility state for at least a predetermined period of time. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 18)
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2. A subscriber station comprising:
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a front end module configured to establish a service with a base station in a licensed spectrum; and a mobility monitoring module configured to; determine a first value of a mobility factor indicative of a relative motion of the subscriber station communicating using the licensed spectrum; and determine an availability of the service from the base station via a non-licensed spectrum; and wherein the front end module is further configured to initiate transfer of the service to the non-licensed spectrum associated with the base station if the first value of the mobility factor indicates that the subscriber station has been in a low mobility state for at least a predetermined period of time. - View Dependent Claims (11, 12)
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13. A subscriber station comprising:
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a front end module configured to establish a service with a base station via a non-licensed spectrum; a mobility monitoring module configured to; determine a first value of a mobility factor indicative of a relative motion of the subscriber station communicating using the non-licensed spectrum; and determine an availability of the service from the base station via a licensed spectrum; and wherein the front end module is further configured to initiate transfer of the service to the licensed spectrum associated with the base station if the first value of the mobility factor indicates that the subscriber station has been in a high mobility state for at least a predetermined period of time. - View Dependent Claims (14, 15, 17)
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16. A method of handoff in a wireless system having a base station that communicates with a subscriber station, the method comprising:
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establishing, at the base station, a service with the subscriber station in a non-licensed spectrum; determining, at the base station, a first value of a mobility factor indicative of a relative motion of the subscriber station; transferring, at the base station, the service from the non-licensed spectrum to a licensed spectrum associated with the base station if the first value of the mobility factor indicates that the subscriber station has been in a high mobility state for at least a predetermined period of time.
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Specification