Systems and methods for GSM selection
First Claim
Patent Images
1. A method for selecting a GSM network service provider comprising:
- scanning at least one frequency band;
receiving a Location Area Code (LAC);
selecting a network service provider to attempt to perform a location update based on the LAC; and
providing a plurality of files in a Subscriber Identity Module (SIM) of a mobile station (MS),wherein at least one of the plurality of files is used in selecting the network service provider, andwherein the plurality of files includes a first file dictating in what order to scan frequency bands when the MS powers up, a second file containing location areas that are to be considered as a part of a home network, a third file dictating which frequency bands to scan when the MS is in a home MCC but not within home network LACs, a fourth file dictating in what order to scan frequency bands within the home MCC, a fifth file dictating which frequency bands to scan when the MS is not in the home MCC, and a sixth file containing location areas of preferred networks.
3 Assignments
0 Petitions
Accused Products
Abstract
The present invention provides enhanced GSM network selection process. The present utilizes a LAC, along with unique selection files, in selecting a network service provider, thus providing granularity in network selection process. A mobile first searches for a home network LAC. If the mobile finds a home network LAC, the mobile then attempts to perform a location update on the home network LAC. If not, the mobile searches for a preferred network LAC. If the mobile does not find a preferred network LAC, the mobile than searches for a preferred network PLMN.
60 Citations
30 Claims
-
1. A method for selecting a GSM network service provider comprising:
-
scanning at least one frequency band; receiving a Location Area Code (LAC); selecting a network service provider to attempt to perform a location update based on the LAC; and providing a plurality of files in a Subscriber Identity Module (SIM) of a mobile station (MS), wherein at least one of the plurality of files is used in selecting the network service provider, and wherein the plurality of files includes a first file dictating in what order to scan frequency bands when the MS powers up, a second file containing location areas that are to be considered as a part of a home network, a third file dictating which frequency bands to scan when the MS is in a home MCC but not within home network LACs, a fourth file dictating in what order to scan frequency bands within the home MCC, a fifth file dictating which frequency bands to scan when the MS is not in the home MCC, and a sixth file containing location areas of preferred networks. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A reselection process in a GSM network for selecting a network service provider comprising:
-
providing a first file listing frequency bands to scan when the MS is in a home MCC; scanning the frequency bands listed in the first file when a period defined by a home PLMN timer in a SIM of the MS expires; and searching for a home network LAC utilizing a second file listing location areas that are to be considered as a part of a home network to perform a location update. - View Dependent Claims (13, 14)
-
-
15. A reselection process in a GSM network for selecting a network service provider comprising:
-
providing a first file listing frequency bands to scan when the MS is not in a home MCC in a SIM of the MS; and determining whether the MS is on a home LAC when a period defined by a home PLMN timer in a SIM of the MS expires, wherein if the MS in on the home LAC, the MS remains on an incumbent network, and if the MS is not on the home LAC, the MS determines if the MS is in the home MCC. - View Dependent Claims (16, 17, 18, 19, 20)
-
-
21. A reselection process in a GSM network for selecting a network service provider for a MS when the MS loses a network signal comprising:
-
providing a plurality of files on a SIM of the MS; scanning frequency bands according to an order in a first file when a period defined by a home PLMN timer in the SIM of the MS expires; searching for a home network LAC; and attempting to perform a location update on the home network LAC, wherein the home network LAC is defined in a second file in the SIM of the MS. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
-
Specification