Optimized routing of calls to roaming subscribers within a telecommunications network
First Claim
1. A method for optimally connecting a call from a calling mobile station served by an originating mobile switching center (MSC) within a first Public Land Mobile Network (PLMN) to a called mobile station associated with a second PLMN, said called mobile station currently being located within said first PLMN, said method comprising the steps of:
- dialing a service code followed by a directory number associated with said mobile station by said calling mobile station;
receiving said dialed service code and said dialed directory number at said originating MSC within said first PLMN, said received service code indicating that said directory number is a mobile station number;
identifying, by said originating MSC, in response to said service code, a home location register (HLR) associated with said called mobile station, said HLR being located within said second PLMN;
interrogating, by said originating mobile switching center, said home location register (HLR) to determine a destination MSC currently serving said called mobile station, said destination MSC being located within said first PLMN; and
originating a call setup signal from said originating MSC directly towards said destination MSC, bypassing said second PLMN, to establish a call connection between said calling mobile station and said called mobile station.
6 Assignments
0 Petitions
Accused Products
Abstract
A calling party subscriber informs the serving telecommunications node that the dialed called party number represents a mobile number. The serving telecommunications node then interrogates the home location register (HLR) associated with the called party mobile station to determine the current location of the called party mobile station. Upon determining the mobile switching center (MSC) currently serving the called party mobile station, the serving telecommunications node then directly establishes a call connection with the serving MSC. The serving MSC then establishes a speech connection over a radio channel with the called party mobile station traveling within its coverage area to enable the calling party terminal to communicate with the called party mobile station.
41 Citations
10 Claims
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1. A method for optimally connecting a call from a calling mobile station served by an originating mobile switching center (MSC) within a first Public Land Mobile Network (PLMN) to a called mobile station associated with a second PLMN, said called mobile station currently being located within said first PLMN, said method comprising the steps of:
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dialing a service code followed by a directory number associated with said mobile station by said calling mobile station; receiving said dialed service code and said dialed directory number at said originating MSC within said first PLMN, said received service code indicating that said directory number is a mobile station number; identifying, by said originating MSC, in response to said service code, a home location register (HLR) associated with said called mobile station, said HLR being located within said second PLMN; interrogating, by said originating mobile switching center, said home location register (HLR) to determine a destination MSC currently serving said called mobile station, said destination MSC being located within said first PLMN; and originating a call setup signal from said originating MSC directly towards said destination MSC, bypassing said second PLMN, to establish a call connection between said calling mobile station and said called mobile station. - View Dependent Claims (2, 3, 4, 5)
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6. A system for optimally connecting a call from a calling mobile station served by an originating mobile switching center (MSC) within a first Public Land Mobile Network (PLMN) to a called mobile station associated with a second PLMN, said called mobile station currently being located within said first PLMN, said system comprising:
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means for dialing a service code followed by a directory number associated with said called mobile station by said calling mobile station; means for receiving said dialed service code and said directory number at said originating MSC, said received service code indicating that said directory number is a mobile station number; means for identifying, by said originating MSC, in response to said service code, a home location register (HLR) associated with said called mobile station, said HLR being located within said second PLMN; means for interrogating, by said originating MSC, said HLR to determine a destination MSC currently serving said mobile station, said destination MSC being located within said first PLMN; and means for originating a call setup signal from said originating MSC directly towards said destination MSC, bypassing said second PLMN, to establish a call connection between said calling mobile station and said called mobile station. - View Dependent Claims (7, 8, 9, 10)
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Specification