System and method for restricting mobility of subscribers assigned to fixed subscription areas in a cellular telecommunications network
First Claim
1. A cellular telecommunication system having a plurality of cells and a plurality of subscribers utilizing cellular telephones of approximately equal radio frequency transmitter power to access said cellular system, said plurality of subscribers including at least one fixed subscriber assigned to a fixed subscription area (FSA) engaged in an ongoing call in a serving cell, said system comprising:
- a mobile switching center (MSC) which includes a database defining which of said plurality of cells are included in said FSA;
a home location register (HLR) that stores a subscriber profile for each of said plurality of subscribers, each subscriber profile identifying whether an associated subscriber is a fixed subscriber;
means for sending an inquiry from said MSC to said HLR to determine whether a subscriber is a normal subscriber or a fixed subscriber;
a plurality of base stations electronically connected to said MSC, each of said base stations transmitting radio frequency signals over a coverage area defining one of said cells, and receiving radio frequency signals from said cellular telephones of approximately equal radio frequency transmitter power; and
a restricted mobility function for restricting said on-going call of said fixed subscriber to said FSA.
1 Assignment
0 Petitions
Accused Products
Abstract
A system and method of restricting an on-going call of a fixed subscriber to a fixed subscription area (FSA) in a cellular telecommunication system having a plurality of cells and a plurality of subscribers. The plurality of subscribers includes at least one fixed subscriber assigned to the FSA and engaged in an on-going call in a serving cell. The system and method detect when the fixed subscriber is crossing a cell border between the serving cell and a neighbor cell, determine whether the neighbor cell is located in the FSA, and drop the on-going call of the fixed subscriber upon determining that the neighbor cell is located outside the FSA.
52 Citations
25 Claims
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1. A cellular telecommunication system having a plurality of cells and a plurality of subscribers utilizing cellular telephones of approximately equal radio frequency transmitter power to access said cellular system, said plurality of subscribers including at least one fixed subscriber assigned to a fixed subscription area (FSA) engaged in an ongoing call in a serving cell, said system comprising:
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a mobile switching center (MSC) which includes a database defining which of said plurality of cells are included in said FSA; a home location register (HLR) that stores a subscriber profile for each of said plurality of subscribers, each subscriber profile identifying whether an associated subscriber is a fixed subscriber; means for sending an inquiry from said MSC to said HLR to determine whether a subscriber is a normal subscriber or a fixed subscriber; a plurality of base stations electronically connected to said MSC, each of said base stations transmitting radio frequency signals over a coverage area defining one of said cells, and receiving radio frequency signals from said cellular telephones of approximately equal radio frequency transmitter power; and a restricted mobility function for restricting said on-going call of said fixed subscriber to said FSA. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. In a cellular telecommunication system having a serving mobile switching center (MSC), a home location register (HLR), a plurality of cells and a fixed subscription area (FSA), a method of restricting an on-going call of a fixed subscriber to said FSA, said method comprising the steps of:
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receiving radio frequency transmissions from a plurality of subscribers utilizing cellular telephones of approximately equal radio frequency transmitter power to access said cellular system, said plurality of subscribers including said fixed subscriber assigned to said FSA; defining, in a subscriber profile stored in said HLR, whether each of said plurality of subscribers is a fixed subscriber assigned to said FSA; detecting when one of said plurality of subscribers is crossing a cell border between a serving cell and a neighbor cell; sending an inquiry from said serving MSC to said HLR to determine whether said subscriber crossing the cell border is a fixed subscriber assigned to said FSA; determining, from a database in said MSC, whether said neighbor cell is located in said FSA; and dropping said on-going call of said fixed subscriber upon determining that said subscriber crossing the cell border is a fixed subscriber assigned to said FSA and said neighbor cell is located outside said FSA. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A cellular telecommunication system having a plurality of cells and a plurality of subscribers, said plurality of subscribers including at least one fixed subscriber assigned to a fixed subscription area (FSA) engaged in an on-going call in a serving cell, said system comprising:
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a mobile switching center (MSC) which includes a database defining which of said plurality of cells are included in said FSA; a home location register (HLR) that stores a subscriber profile for each of said plurality of subscribers, each subscriber profile identifying whether an associated subscriber is a fixed subscriber; means for sending an inquiry from said MSC to said HLR to determine whether a subscriber is a normal subscriber or a fixed subscriber; a plurality of base stations electronically connected to said MSC, each of said base stations transmitting radio frequency signals over a coverage area defining one of said cells; and a restricted mobility function for restricting said on-going call of said fixed subscriber to said FSA. - View Dependent Claims (18, 19, 20)
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21. In a cellular telecommunication system having a serving mobile switching center (MSC), a home location register (HLR), a plurality of cells and a fixed subscription area (FSA), a method of restricting an on-going call of a fixed subscriber to said FSA, said method comprising the steps of:
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receiving radio frequency transmissions from a plurality of subscribers utilizing mobile stations to access said cellular system, said plurality of subscribers including said fixed subscriber assigned to said FSA; defining, in a subscriber profile stored in said HLR, whether each of said plurality of subscribers is a fixed subscriber assigned to said FSA; detecting when one of said plurality of subscribers is crossing a cell border between a serving cell and a neighbor cell; sending an inquiry from said serving MSC to said HLR to determine whether said subscriber crossing the cell border is a fixed subscriber assigned to said FSA; determining, from a database in said MSC, whether said neighbor cell is located in said FSA; and dropping said on-going call of said fixed subscriber upon determining that said subscriber crossing the cell border is a fixed subscriber assigned to said FSA and said neighbor cell is located outside said FSA. - View Dependent Claims (22, 23, 24, 25)
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Specification