Method and system for acquiring time synchronization between base stations in a broadband wireless access communication system
First Claim
1. A method for acquiring time synchronization by a first base station in a broadband wireless access communication system including a plurality of base stations which include certain base stations having already acquired time synchronization and a first base station requiring acquisition of time synchronization, the method comprising the steps of:
- scanning neighbor base stations around the first base station and requesting time synchronization information from the scanned neighbor base stations by the first base station;
receiving responses from predetermined neighbor base stations having already acquired time synchronization from among the neighbor base stations, the responses including time synchronization information of the predetermined neighbor base stations; and
selecting a second base station from among the predetermined neighbor base stations and acquiring time synchronization based on the time synchronization information of the second base station; and
rescanning neighbor base stations around the first base station at a predetermined time period and requesting time synchronization information from the rescanned neighbor base stations by the first base station,wherein the time synchronization information is information which indicates a current time point and serves as a reference when other BSs acquire the time synchronization.
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Accused Products
Abstract
Method and system by which a base station without a Global Positioning System (GPS) receiver acquires time synchronization in a Broadband Wireless Access (BWA) communication system. The method includes scanning neighbor base stations around a first base station and requesting time synchronization information from the scanned neighbor base stations by the first base station; receiving responses from predetermined neighbor base stations having already acquired time synchronization from among the neighbor base stations, the responses including time synchronization information of the predetermined neighbor base stations; and selecting a second base station from among the predetermined neighbor base stations and acquiring time synchronization based on the time synchronization information of the second base station.
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Citations
24 Claims
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1. A method for acquiring time synchronization by a first base station in a broadband wireless access communication system including a plurality of base stations which include certain base stations having already acquired time synchronization and a first base station requiring acquisition of time synchronization, the method comprising the steps of:
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scanning neighbor base stations around the first base station and requesting time synchronization information from the scanned neighbor base stations by the first base station; receiving responses from predetermined neighbor base stations having already acquired time synchronization from among the neighbor base stations, the responses including time synchronization information of the predetermined neighbor base stations; and selecting a second base station from among the predetermined neighbor base stations and acquiring time synchronization based on the time synchronization information of the second base station; and rescanning neighbor base stations around the first base station at a predetermined time period and requesting time synchronization information from the rescanned neighbor base stations by the first base station, wherein the time synchronization information is information which indicates a current time point and serves as a reference when other BSs acquire the time synchronization. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for supporting acquisition of time synchronization of a first base station by a second base station in a broadband wireless access communication system including a plurality of base stations which include certain base stations having already acquired time synchronization and the first base station requiring acquisition of time synchronization, the second base station being one of the certain base stations and located adjacently to the first base station, the method comprising the steps of:
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receiving a time synchronization information request message from the first base station by the second base station; and transmitting a response message including time synchronization information of the second base station to the first base station in response to the time synchronization information request message, so that the first base station can acquire time synchronization with the second base station, wherein the time synchronization information is information which indicates a current time point and serves as a reference when other BSs acquire the time synchronization, and wherein the time synchronization information request message is received at a predetermined period by the second base station. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A system for acquiring time synchronization by a first base station in a broadband wireless access communication system including a plurality of base stations which include certain base stations having already acquired time synchronization and the first base station requiring acquisition of time synchronization, the system comprising:
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the first base station for scanning neighbor base stations around the first base station, requesting time synchronization information from the scanned neighbor base stations, receiving responses from predetermined neighbor base stations having already acquired time synchronization from among the neighbor base stations, selecting a second base station from among the predetermined neighbor base stations, and acquiring time synchronization based on the time synchronization information of the second base station, the responses including time synchronization information of the predetermined neighbor base stations; and the second base station for, in response to the request for the time synchronization information from the first base station, transmitting a response message including time synchronization information of the second base station to the first base station, so that the first base station can acquire time synchronization with the second base station, wherein the time synchronization information is information which indicates a current time point and serves as a reference when other BSs acquire the time synchronization,and wherein the first base station rescans neighbor base stations around the first base station at a predetermined time period and requests time synchronization information to the rescanned neighbor base stations. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24)
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Specification