Substitution call control system in a communication network
AssigneeJuniper Networks, Inc.
InventorMasashi Tanaka
Life of this patent
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Abstract
A substitution call control system includes an ATM (Asynchronous Transfer Mode) subscriber network of an ATM communication network. The ATM subscriber network includes a plurality of network terminators respectively connected with a plurality of subscriber terminals, and an ATM subscriber line concentrator, which accommodates VCs (Virtual Connection) to the plurality of network terminators, and is connected with a ATM switching apparatus of the ATM network through a UNI (User-Network Interface). The ATM subscriber line concentrator includes a substitution call control function to substitute for the plurality of network terminators and the subscriber terminals for a call control.
Claims20
A call control system for use in a communication network, the system comprising:
- a subscriber line concentrator including:
- a first communication layer structure to communicate, using a first protocol stack, with a switching apparatus;
- a second communication layer structure to communicate, using a second protocol stack that differs from the first protocol stack, with a plurality of network terminators, respectively coupled to a plurality of subscriber terminals, where at least one layer of the first protocol stack and at least one layer of the second protocol stack use a same protocol;
- and
- a substitution control component to perform a protocol conversion between the first protocol stack, used by the first communication layer structure, and the second protocol stack, used by the second communication layer structure.
A method of providing a connection, in a subscriber communication network, between a network switching apparatus and a plurality of subscriber terminals that do not have call control functions, the method comprising:
- converting communications from the network switching apparatus, at a subscriber line concentrator, from a first protocol stack to a second protocol stack, where the first protocol stack and the second protocol stack differ;
- communicating, using the second protocol stack, between the subscriber line concentrator and a plurality of network terminators;
- converting communications from the subscriber line concentrator, at the plurality of network terminators, from the second protocol stack to a third protocol stack, where the second protocol stack differs from the third protocol stack;
- and
- communicating, using the third protocol stack, between the plurality of network terminators and the plurality of subscriber terminals, where at least one layer of the first, second, and third protocol stacks uses a same protocol.
A call control system for use in a communication network, the system comprising:
- a subscriber line concentrator to:
- establish and terminate, using a call control function, VCs (Virtual Connections) with a plurality of network terminators,
- couple to a switching apparatus of the network through a UNI (User-Network Interface), and
- perform a protocol conversion between a first protocol stack used between the subscriber line concentrator and the switching apparatus and a second protocol stack used between the subscriber line concentrator and the plurality of network terminators;
- and
- the plurality of network terminators to:
- respectively connect to a plurality of subscriber terminals, and
- perform a protocol conversion between the second protocol stack and a third protocol stack used between the plurality of network terminators and the plurality of subscriber terminals, where at least one layer of the first protocol stack and at least one layer of the second protocol stack comprise a same protocol.
Dependencies are inferred from the claim text.