Mobile telecommunications network having integrated wireless office system
AssigneeTelefonaktiebolaget L M Ericsson (publ)
InventorsIna Widergen, Marie Svensson, Sven Gunnar Ivar Thrysin
Life of this patent
Estimating the term…
Abstract
A mobile telecommunications network having an integrated wireless office system is disclosed. A wireless office system is integrated into both a private telephony network (PTN) and a public land mobile network (PLMN) which includes a public cellular system. The wireless office system provides mobile service to corporate mobile terminals (CMTs) that are part of a corporate group of terminals of the PTN. The CMTs of the wireless office system appear to the PTN as normal fixed extension terminals and PTN internal features such as call back, caller identification and operator assistance may be used at the CMTs.
Claims25
A method of call routing in a telecommunications system combination having a private telephony network, PTN, including a plurality of nodes, each of said nodes assigned at least one personal number, PN, and at least one subscriber number, wherein said PTN provides private telephony service at each of said nodes, said telecommunications system combination further having a mobile network including a wireless system coupled to a selected node of said PTN over a first interface, said wireless system having at least one mobile terminal associated with a selected at least one PN and a selected at least one subscriber number, both assigned to said selected node, said mobile network further including a cellular system coupled to said wireless system, said method comprising the steps of:
- receiving a call in said PTN directed to the selected node;
- routing said call over the first interface from said PTN to the wireless system;
- determining, in the wireless system, whether said call was received over the first interface;
- and
- in response to an affirmative determination:
- sending a request for a roaming number from the wireless system to the cellular system;
- receiving said roaming number in the wireless system;
- and
- routing said call to a location within the mobile network indicated by said roaming number.
A method of call routing in a telecommunications system combination having a private telephony network, PTN, including a plurality of nodes, each of said nodes assigned at least one personal number, PN, and at least one subscriber number, wherein said PTN provides private telephony service at each of said nodes, said telecommunications system combination further having a mobile network including a wireless system coupled to a selected node of said PTN over a first interface, said wireless system having a first at least one mobile terminal associated with a selected at least one PN and a selected at least one subscriber number, both assigned to said selected node, said mobile network further including a cellular system coupled to said wireless system over a trunk line, said cellular system having a second at least one mobile terminal, wherein said first and second mobile terminals may roam within said mobile network, said method comprising the steps of:
- receiving a call in the cellular system, said call directed from the first at least one mobile terminal to the second at least one mobile terminal, when the first and second at least one mobile terminals are located within the cellular system;
- routing said call to the wireless system over the trunk line;
- routing said call from the wireless system to the PTN;
- and
- routing said call from the PTN to the cellular system through an external network.
A method of call routing in a telecommunciations system combination having a private telephony network, PTN, including a plurality of nodes, each of said nodes assigned at least one personal number, PN, and at least one subscriber number, wherein said PTN provides private telephony service at each of said nodes, said telecommunications system combination further having a mobile network including a wireless system coupled to a selected node of said PTN over a first interface, said wireless system having at first at least one mobile terminal associated with a selected at least one PN and a selected at least one subscriber number, both assigned to said selected node, said mobile network further including a cellular system coupled to said wireless system over a trunk line, said cellular system having a second at least one mobile terminal, wherein said first and second mobile terminals may roam within said mobile network, said method comprising the steps of:
- receiving a call within the wireless system;
- determining whether said call was initiated from the first at least one mobile terminal or the second at least one mobile terminal;
- routing, responsive to a determination in the step of determining that said call was initiated from the first at least one mobile terminal, said call from the wireless system to the PTN;
- routing said call to the cellular system through the external network;
- and
- routing said call from the cellular system to the wireless system over the trunk line.
A telecommunications system combination comprising:
- a private telephony network, PTN, having a plurality of nodes, each of said nodes assigned at least one personal number, PN, wherein said private telephony network provides private telephony service at each of said nodes;
- and
- a mobile network including:
- a wireless system coupled to a selected node of said PTN, said wireless system having at least one mobile terminal associated with a first at least one PN assigned to said selected node, said wireless system comprising a gateway function for routing calls placed to and from said first at least one PN, initiated from within said wireless system, through said PTN when said at least one mobile terminal is located within the coverage area of said wireless system;
- and
- a cellular system coupled to said gateway function, said cellular system including a service controller for translating said first at least one PN into a selected at least one mobile identification number, MIN, said cellular system further comprising a home location register for storing a roaming number associated with said at least one MIN, said roaming number indicative of a location of said at least one mobile terminal within said mobile network, and calls received in said PTN for said first at least one PN are routed within said mobile network according to said roaming number.
A method of call routing in a telecommunications system combination having a private telephony network, PTN, including a plurality of nodes, each of said nodes assigned at least one personal number, PN, and at least one subscriber number, wherein said PTN provides private telephony service at each of said nodes, said telecommunications system combination further having a mobile network including a wireless system coupled to a selected node of said PTN over a first interface, said wireless system having at first at least one mobile terminal associated with a selected at least one PN and a selected at least one subscriber number, both assigned to said selected node, said mobile network further including a cellular system coupled to said wireless system over a trunk line, said cellular system having a second at least one mobile terminal, wherein said first and second mobile terminals may roam within said mobile network, said method comprising the steps of:
- receiving a call within the wireless office system;
- determining whether said call was initiated from the first at least one mobile terminal or the second at least one mobile terminal;
- routing, responsive to a determination in the step of determining that said call was initiated from the second at least one mobile terminal, said call from the wireless system to the cellular system through the external network;
- and
- routing said call from the cellular system to the PTN over the trunk line.
Dependencies are inferred from the claim text.