Methods for the synchronization of multiple base stations in a wireless communication system
First Claim
1. In a wireless system, a method comprising:
- storing time stamp information at a first base station having a first counter;
setting the first counter of the first base station based on a signal provided by a second base station having a second counter; and
generating timing information for transmission by the first base station using the first counter.
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Accused Products
Abstract
A plurality of base station devices are linked together and synchronized to facilitate communication between the respective base station devices and respective downlink subscriber stations. According to one embodiment of the invention, one of the base station devices is designated as a master device, and the other base station devices are designated as slave devices. The respective base station devices are connected to each other by means of a synchronization bus. The master base station device then generates and broadcasts a future time stamp value, which is received by the respective slave base station devices. When the time stamp counter in the master base station device reaches the transmitted value, a control signal is broadcast over the synchronization bus. The slave base station devices then retrieve the time stamp value and reset their respective local time stamp counters to the received value. In this manner, the base station devices are synchronized.
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Citations
24 Claims
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1. In a wireless system, a method comprising:
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storing time stamp information at a first base station having a first counter; setting the first counter of the first base station based on a signal provided by a second base station having a second counter; and generating timing information for transmission by the first base station using the first counter. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. In a wireless system, a method comprising:
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transmitting MAF information including identifiers associated with respective uplink channels from a first base station to subscriber stations coupled to the uplink channels; and filtering the MAP information at a second base station based on an identifier of the MAP information that corresponds with an uplink channel that is connected to the second base station. - View Dependent Claims (9, 10, 11)
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12. A method of synchronizing plural base stations in a wireless system, the method comprising:
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generating a future time stamp value; transmitting the future time stamp value to a first base station and to a plurality of second base stations; storing the future time stamp value at each base station; comparing the future time stamp value with a current time stamp value at the first base station; generating a signal at the first base station when the future time stamp value matches the current time stamp value; transmitting the signal to the respective second base stations; and at each second base station, setting a local counter to the future time stamp value upon receipt of the signal. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. In a wireless system having multiple base stations, with each base station being coupled to at least one uplink channel, a method of allocating time slots on a plurality of uplink channels, the method comprising:
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assigning a unique identifier to each of the uplink channels; generating time-slot allocation information for the respective uplink channels; transmitting the allocation information to at least one of the base stations; forwarding the allocation information to a plurality of subscriber stations via a downlink channel; transmitting the allocation information to the remainder of the base stations; at each base station, determining whether the allocation information pertains to an uplink channel associated with that base station; and at each base station, processing the allocation information if the allocation information pertains to an uplink channel associated with that base station. - View Dependent Claims (20, 21, 22, 23, 24)
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Specification