Wireless communication system, its base station and mobile station, communication synchronization management method and timer control program therefor
First Claim
1. A base station of a wireless communication system which performs communication between a mobile station and the base station, the base station comprising:
- a timer unit which sets a period for judging whether an uplink signal from the mobile station is synchronized; and
a timer control unit which determines the set period for each of mobile stations and notifies the set period to each of the mobile stations.
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Abstract
A wireless communication system is provided for reducing the probability that latency before data transmission increases when a mobile station that is actually in sync is judged to be out of sync. A base station causes the timing calculation part to calculate the timing advance (TA) of a transmit timing from the mth mobile station; causes the timer adaptive control part to obtain the traveling speed or the time variation in TA of the mth mobile station and, adaptively determines and outputs as the timer update information the length of the mth first timer within an M number in total of synchronization timers and the length of the second timer of the mth mobile station and update the length of the mth first timer; and transmits from the downlink transmission part a downlink signal which contains timer update information.
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Citations
21 Claims
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1. A base station of a wireless communication system which performs communication between a mobile station and the base station, the base station comprising:
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a timer unit which sets a period for judging whether an uplink signal from the mobile station is synchronized; and a timer control unit which determines the set period for each of mobile stations and notifies the set period to each of the mobile stations. - View Dependent Claims (2)
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3. A mobile station of a wireless communication system which performs communication between the mobile station and a base station, the mobile station comprising:
a unit which judges whether an uplink signal to the base station is synchronized based on a set period which is determined for each of a plurality of mobile stations and notified to each of the mobile stations. - View Dependent Claims (4)
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5. A method executed by at least one processor of controlling a base station of a wireless communication system which perfumes communication between a plurality of mobile stations and the base station, the method comprising:
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setting a period for judging whether an uplink signal from one of the mobile stations is synchronized; and determining the set period for each of the mobile stations and notifies the set period to each of the mobile stations.
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6. A method executed by at least one processor of controlling a mobile station of a wireless communication system. which performs communication between the mobile station and a base station, the method comprising:
judging whether an uplink signal to the base station is synchronized based on a set period which is determined for each of a plurality of mobile stations and notified to each of the mobile stations.
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7. A wireless communication system which performs communication between a mobile station and a base station, wherein the base station comprises:
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a timer unit which sets a period for judging whether an uplink signal from the mobile station is synchronized, a timer control unit which determines the set period for each of a plurality of mobile stations and notifies the set period to each of the mobile stations; and wherein the mobile station comprises; a unit which judges whether an uplink signal to the base station is synchronized based on a set period which is determined for each of the mobile stations and notified to each of the mobile stations.
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8. A method executed by a mobile station among a plurality of mobile stations in a cell managed by a base station, the method comprising:
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receiving a cell specific timer value of a timer, wherein the cell specific timer value of the timer is common to all of the plurality of mobile stations in the cell; receiving a mobile station dedicated timer value of the timer after receiving the cell specific timer value, wherein the mobile station dedicated timer value of the timer is transmitted by the base station to the mobile station dedicatedly; receiving a timing advance to control uplink synchronization; and determining if one or more uplink signals is synchronized by using the mobile station dedicated timer value of the timer after receiving the mobile station dedicated timer value of the timer. - View Dependent Claims (9, 16, 19)
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10. A mobile station among a plurality of mobile stations in a cell managed by a base station, the mobile station comprising:
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a receiver configured to; receive a cell specific timer value of a timer before receiving a mobile station dedicated timer value of the timer, wherein the cell specific timer value of the timer is common to all of the plurality of mobile stations in the cell; receive the mobile station dedicated timer value of the timer, wherein the mobile station dedicated timer value of the timer is transmitted by the base station to the mobile station dedicatedly; and receive a timing advance to control uplink synchronization; and a processor configured to determine if one or more uplink signals is synchronized by using the mobile station dedicated timer value of the timer after the receiver receives the mobile station dedicated timer value of the timer. - View Dependent Claims (11, 17, 20)
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12. A mobile station among a plurality of mobile stations in a cell managed by a base station, the mobile station comprising:
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a receiver configured to; receive a cell specific timer value of a timer, wherein the cell specific timer value of the timer is common to all of the plurality of mobile stations in the cell; receive a mobile station dedicated timer value of the timer after receiving the cell specific timer value, wherein the mobile station dedicated timer value of the timer is transmitted by the base station to the mobile station dedicatedly; and receive a timing advance to control uplink synchronization; and a processor configured to determine if one or more uplink signals is synchronized by using the mobile station dedicated timer value after the receiver receives the mobile station dedicated timer value of the timer. - View Dependent Claims (13, 14, 15, 18, 21)
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Specification