Device and methods for acquiring a public land mobile network of a mobile station and providing public land mobile network information in a cellular communication system
First Claim
1. A method for acquiring a public land mobile network (PLMN) of a mobile station for registering the mobile station in a cell overlapped operated by a first business operator with a cell of a base station operated by a second business operator, the method comprising the steps of:
- (i) scanning a plurality of slot synchronizations having different signal strengths using a previously set carrier frequency, (ii) determining whether a corresponding base station is operated based on home PLMN information included in system information in response to a slot synchronization having a strongest signal strength;
(iii) extracting cell overlapped information from the system information when the corresponding base station is not operated based on the home PLMN, the cell overlapped information indicating that a base station is overlapped with the base station operated by the second business operator; and
(iv) re-executing a PLMN acquisition procedure for different slot synchronizations with respect to an identical frequency based on the cell overlapped information.
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Accused Products
Abstract
Methods for acquiring a public land mobile network (PLMN) of a mobile station and providing PLMN information of a base station in a cellular communication system and a base station capable of guaranteeing an acquisition of a home PLMN for registering a mobile station in a home base station which forms an overlapped signal cell together with a base station operated by a second business operator using the same frequency. It is determined whether a corresponding base station is a home PLMN. Cell overlapped information is extracted from the system information when the corresponding base station is not the home PLMN. The cell overlapped information indicates that the home base station forms an overlapped cell together with the base station operated by the second business operator. A PLMN acquisition procedure for different slot synchronizations with respect to an identical frequency is executed based on the cell overlapped information.
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Citations
18 Claims
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1. A method for acquiring a public land mobile network (PLMN) of a mobile station for registering the mobile station in a cell overlapped operated by a first business operator with a cell of a base station operated by a second business operator, the method comprising the steps of:
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(i) scanning a plurality of slot synchronizations having different signal strengths using a previously set carrier frequency, (ii) determining whether a corresponding base station is operated based on home PLMN information included in system information in response to a slot synchronization having a strongest signal strength;
(iii) extracting cell overlapped information from the system information when the corresponding base station is not operated based on the home PLMN, the cell overlapped information indicating that a base station is overlapped with the base station operated by the second business operator; and
(iv) re-executing a PLMN acquisition procedure for different slot synchronizations with respect to an identical frequency based on the cell overlapped information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for providing public land mobile network (PLMN) information of a base station operated by a first business operator having a cell which is overlapped with a cell of a base station operated by a second business operator using an identical frequency, the method comprising the steps of:
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(c) producing system information;
(b) producing cell overlapping information indicating that the base station is overlapped with the base station operated by the second business operator;
(c) adding the cell overlapping information to the system information; and
(d) broadcasting the system information including the cell overlapped information. - View Dependent Claims (11, 12, 13)
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14. A mobile station having a home public land mobile network (PLMN) function for registering a mobile station in a cell operated by a first business operator overlapped with a cell of a base station operated by a second business operator, the mobile station comprising:
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a controller for acquiring system information corresponding to a slot synchronization having a strongest signal strength among a plurality of acquired slot synchronizations using a previously set carrier frequency during an acquisition of the PLMN;
extracting PLMN information from the acquired system information;
determining whether a corresponding base station is a home PLMN based on the extracted PLMN information;
determining whether cell overlapped information is included in the system information when the corresponding base station is not the home PLMN, wherein the cell overlapped information indicates that a base station is overlapped with the base station operated by the second business operator; and
executing a PLMN acquisition procedure for different slot synchronizations based on the cell overlapped information. - View Dependent Claims (15, 16, 17, 18)
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Specification