Optimized routing of terminating calls within a mobile telecommunications network

Claim 1

A method for routing a call to a mobile station within a mobile telecommunications network, said method comprising the steps of: originating a first call setup signal from a telecommunications node to establish a call connection with a mobile station; routing said first call setup signal to a gateway mobile switching center (GMSC) serving a mobile telecommunications network associated with said mobile station, wherein said GMSC differs from said telecommunications node; transmitting a first signal from said GMSC to a home location register (HLR) associated with said mobile station, said first signal including first data identifying said telecommunications node; transmitting a second signal from said HLR to a mobile switching center (MSC) serving said mobile station in response to a receipt of said first signal, said second signal requesting a roaming number from said MSC; receiving a third signal at said HLR from said MSC, said third signal including said roaming number; determining that an optimal routing of said call connection between the telecommunications node and the MSC should be performed by evaluating said first data and said received roaming number; transmitting a fourth signal from said HLR to said telecommunications node informing said telecommunications node to perform an optimal routing of said call connection, said fourth signal including said received roaming number; and originating a second call setup signal from said telecommunications node to said MSC using said received roaming number.

Claim 2

A method for routing a call to a mobile station within a mobile telecommunications network, said method comprising the steps of: originating a first call setup signal from a telecommunications node to establish a call connection with a mobile station; routing said first call setup signal to a gateway mobile switching center (GMSC) serving a mobile telecommunications network associated with said mobile station, wherein said GMSC differs from said telecommunications node; transmitting a first signal from said GMSC to a home location register (HLR) associated with said mobile station, said first signal including first data identifying said telecommunications node; transmitting a second signal from said HLR to a mobile switching center (MSC) serving said mobile station in response to a receipt of said first signal, said second signal requesting a roaming number from said MSC; receiving a third signal at said HLR from said MSC, said third signal including said roaming number; determining that an optimal routing of said call connection between the telecommunications node and the MSC should be performed by evaluating said first data and said received roaming number; transmitting a fourth signal from said HLR to said telecommunications node informing said telecommunications node to perform an optimal routing of said call connection, said fourth signal including said received roaming number; and originating a second call setup signal from said telecommunications node to said MSC using said received roaming number.

Claim 11

A method for routing a terminating call to a mobile station within a mobile telecommunications network, said method comprising the steps of: receiving a first call setup signal originated from a telecommunications node and received at a gateway mobile switching center (GMSC) serving a mobile telecommunications network associated with a particular mobile station, said call setup signal requesting a call connection towards said mobile station; transmitting a first signal from said GMSC to a home location register (HLR) associated with said mobile station requesting said HLR for a routing instruction, said first signal including data identifying said telecommunications node; transmitting a second signal, in response to a receipt of said first signal, from said HLR to a mobile switching center (MSC) serving said mobile station requesting said MSC for a roaming number; receiving a third signal at said HLR from said MSC, said third signal including said roaming number identifying said MSC; determining that an optimal routing of said call connection between the telecommunications node and the MSC should be performed by evaluating said data and said roaming number; transmitting a fourth signal from said HLR to said telecommunications node instructing said telecommunications node to release said call connection established between said telecommunications node and said GMSC as a result of said first call setup signal and to originate a second call setup signal directly towards said MSC by utilizing said received roaming number as a destination address.

Claim 12

A method for routing a terminating call to a mobile station within a mobile telecommunications network, said method comprising the steps of: receiving a first call setup signal originated from a telecommunications node and received at a gateway mobile switching center (GMSC) serving a mobile telecommunications network associated with a particular mobile station, said call setup signal requesting a call connection towards said mobile station; transmitting a first signal from said GMSC to a home location register (HLR) associated with said mobile station requesting said HLR for a routing instruction, said first signal including data identifying said telecommunications node; transmitting a second signal, in response to a receipt of said first signal, from said HLR to a mobile switching center (MSC) serving said mobile station requesting said MSC for a roaming number; receiving a third signal at said HLR from said MSC, said third signal including said roaming number identifying said MSC; determining that an optimal routing of said call connection between the telecommunications node and the MSC should be performed by evaluating said data and said roaming number; transmitting a fourth signal from said HLR to said telecommunications node instructing said telecommunications node to release said call connection established between said telecommunications node and said GMSC as a result of said first call setup signal and to originate a second call setup signal directly towards said MSC by utilizing said received roaming number as a destination address.

Claim 19

A method for originating a call connection towards a mobile station within a telecommunications network, said method comprising the steps of: originating a first call setup signal to a gateway mobile switching center (GMSC) of a mobile telecommunications network from a telecommunications node serving a calling party terminal, said first call setup signal including, as a called party address, a first directory number associated with said mobile station; receiving a connection-less signal at said telecommunications node from the mobile telecommunications network associated with said mobile station, said connection-less signal instructing said telecommunications node to perform optimal call connection towards said mobile station between the telecommunications node and a mobile switching center (MSC) serving said mobile station and including a second directory number representing the MSC serving said mobile station; releasing a trunk call connection established by said telecommunications node toward said mobile telecommunications network as a result of said first call setup signal; and originating a second call setup signal from said telecommunications node to the MSC serving the mobile station with said second directory number associated with said MSC as a called party address.

Claim 20

A method for originating a call connection towards a mobile station within a telecommunications network, said method comprising the steps of: originating a first call setup signal to a gateway mobile switching center (GMSC) of a mobile telecommunications network from a telecommunications node serving a calling party terminal, said first call setup signal including, as a called party address, a first directory number associated with said mobile station; receiving a connection-less signal at said telecommunications node from the mobile telecommunications network associated with said mobile station, said connection-less signal instructing said telecommunications node to perform optimal call connection towards said mobile station between the telecommunications node and a mobile switching center (MSC) serving said mobile station and including a second directory number representing the MSC serving said mobile station; releasing a trunk call connection established by said telecommunications node toward said mobile telecommunications network as a result of said first call setup signal; and originating a second call setup signal from said telecommunications node to the MSC serving the mobile station with said second directory number associated with said MSC as a called party address.

Claim 26

A system for routing a terminating call to a mobile station within a mobile telecommunications network, said system comprising: means for receiving, at a gateway mobile switching center (GMSC), a first call setup signal originated from a telecommunications node, said GMSC serving a mobile telecommunications network associated with a particular mobile station, said first call setup signal requesting a call connection towards said mobile station; means for transmitting a first signal from said GMSC to a home location register (HLR) associated with said mobile station requesting for a routing instruction from said HLR, said first signal including data identifying said telecommunications node; means for determining at said HLR an identity of a mobile switching center (MSC) currently serving said mobile station; means for determining that an optimal routing of said call connection between the telecommunications node and the MSC should be performed by evaluating said data and said identity of said MSC; and means for instructing said telecommunications node to release said call connection established as a result of said first call setup signal and to originate a second call setup signal from the telecommunications node directly towards said MSC.

Claim 27

A system for routing a terminating call to a mobile station within a mobile telecommunications network, said system comprising: means for receiving, at a gateway mobile switching center (GMSC), a first call setup signal originated from a telecommunications node, said GMSC serving a mobile telecommunications network associated with a particular mobile station, said first call setup signal requesting a call connection towards said mobile station; means for transmitting a first signal from said GMSC to a home location register (HLR) associated with said mobile station requesting for a routing instruction from said HLR, said first signal including data identifying said telecommunications node; means for determining at said HLR an identity of a mobile switching center (MSC) currently serving said mobile station; means for determining that an optimal routing of said call connection between the telecommunications node and the MSC should be performed by evaluating said data and said identity of said MSC; and means for instructing said telecommunications node to release said call connection established as a result of said first call setup signal and to originate a second call setup signal from the telecommunications node directly towards said MSC.