Hybrid multizone call delivery system
First Claim
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1. A zoned communication network comprising:
- a central node; and
at least two zone cells, each having a plurality of base stations and a zone controller for controlling an associated zone cell, said zone controller including a visitor location register that is distinct from said plurality of base stations and that maintains a list of portables currently in said zone cell such that said central node need not maintain a home location register for storing a list of locations of portables,wherein said central node establishes a communication link between an incoming call received at said central node and a portable in said zone cell, said zone controller registering an identifier of said portable in said visitor location register as said portable enters said zone cell and being responsive to an indication of said incoming call from said central node to page said portable and signal said central node to establish said communication link if said portable is available to receive said incoming call, said zone controller deleting said identifier of said portable from said visitor location register when said portable leaves said zone cell, said zone controller storing an updatable black list of identifiers of portables that said network will not service.
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Abstract
A hybrid multizone call delivery system delivers calls to portables by broadcasting from a central node a portable identification number (PIN) and dial-in number (DN) to all the zones in the system. Portables register their presence in zones as they roam throughout the coverage area. When a zone matches a broadcast PIN to a PIN registered therein, a zone controller pages the portable and initiates a call back to the broadcast DN. Upon receipt of the call back, the central node connects the incoming call to the portable through the call back connection.
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Citations
19 Claims
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1. A zoned communication network comprising:
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a central node; and at least two zone cells, each having a plurality of base stations and a zone controller for controlling an associated zone cell, said zone controller including a visitor location register that is distinct from said plurality of base stations and that maintains a list of portables currently in said zone cell such that said central node need not maintain a home location register for storing a list of locations of portables, wherein said central node establishes a communication link between an incoming call received at said central node and a portable in said zone cell, said zone controller registering an identifier of said portable in said visitor location register as said portable enters said zone cell and being responsive to an indication of said incoming call from said central node to page said portable and signal said central node to establish said communication link if said portable is available to receive said incoming call, said zone controller deleting said identifier of said portable from said visitor location register when said portable leaves said zone cell, said zone controller storing an updatable black list of identifiers of portables that said network will not service. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of communication in a zoned network, the method comprising the steps of:
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providing a zoned network having a central node and at least two zone cells, each of said at least two zone cells having a plurality of base stations and a zone controller for controlling an associated zone cell, said zone controller including a visitor location register that is distinct from said plurality of base stations and that maintains a list of portables currently in said zone cell such that said central node need not maintain a home location register for storing a list of locations of portables, storing an updatable black list of identifiers of portables that the network will not service in each said visitor location register; registering an identifier of a portable in said visitor location register of a zone cell as said portable enters said zone cell, provided said identifier does not appear in said updatable black list; upon receipt of an incoming message for said portable from a central node, paging said portable from said zone cell; signaling said central node from said zone cell to establish a communication link with said portable, if said portable is available to receive said incoming call; and deleting said identifier of said portable from said visitor location register when said portable leaves said zone cell. - View Dependent Claims (18, 19)
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Specification