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US 6,665,319 B1Granted
Circuit switching device in a telecommunication network
AssigneeAlcatel
InventorsAndré Bergaire, Germain Oliver
Life of this patent
Estimating the term…
Abstract
To provide a high bit rate link between telecommunication network users, HDSL modems are installed on the user premises and at corresponding subscriber line termination units in an exchange. The modems in the exchange are connected to access units of the exchange which include networks of add and drop multiplexers interconnected in a ring and connected to a drop port. It is shown that it is a simple matter to organize dynamic switching between users connected to the same access unit or neighboring access units in the same exchange. Other calls are routed to other exchanges.
Claims14
A circuit switching system in a telecommunication network, including:
- an exchange,
- a set of access units, each of said access units having its own primary ring of add and drop primary multiplexers, each of said add and drop primary multiplexers being connected to user equipments, and
- control means for controlling said primary multiplexers, said control means including:
- means for receiving signaling transmitted by a user equipment connected to said access units, and
- means for producing routing signals corresponding to said signaling, said routing signals constituting control signals for said primary multiplexers of said set of access units for setting up a connection between said subscriber equipment and another subscriber equipment.
2 more elements
A circuit switching system in a telecommunication network, including:
- an exchange,
- a set of access units, each of said access units having its own primary ring of add and drop primary multiplexers, each of said add and drop primary multiplexers being connected to user equipments, and
- control means for controlling said primary multiplexers, said control means including:
- means for receiving signaling transmitted by a user equipment connected to said access units, and
- means for producing routing signals corresponding to said signaling, said routing signals constituting control signals for said primary multiplexers of said set of access units for setting up a connection between said subscriber equipment and another subscriber equipment,
- further including a first high bit rate modem on a users premises and a second high bit rate modem in said exchange of said telecommunication network, wherein said second modem is connected to said first modem by a copper line of said telecommunication network and one of a plurality of inputs-outputs of a primary multiplexer is connected to said second modem.
3 more elements
A circuit switching system in a telecommunication network, including:
- an exchange,
- a set of access units, each of said access units having its own primary ring of add and drop primary multiplexers, each of said add and drop primary multiplexers being connected to user equipments, and
- control means for controlling said primary multiplexers, said control means including:
- means for receiving signaling transmitted by a user equipment connected to said access units, and
- means for producing routing signals corresponding to said signaling, said routing signals constituting control signals for said primary multiplexers of said set of access units for setting up a connection between said subscriber equipment and another subscriber equipment,
- said primary ring of an access unit including three primary multiplexers and one port, and
- wherein said access unit includes a port whose bit rate is in the range from 25% to 50% of, and preferably equal to ⅓ of, the potential total bit rate of said set of multiplexers of said ring.
4 more elements
A circuit switching system in a telecommunication network, including:
- an exchange,
- a set of access units, each of said access units having its own primary ring of add and drop primary multiplexers, each of said add and drop primary multiplexers being connected to user equipments, and
- control means for controlling said primary multiplexers, said control means including:
- means for receiving signaling transmitted by a user equipment connected to said access units, and
- means for producing routing signals corresponding to said signaling, said routing signals constituting control signals for said primary multiplexers of said set of access units for setting up a connection between said subscriber equipment and another subscriber equipment,
- wherein said exchange further includes a connection-switching stage including a very high bit rate secondary ring of secondary add and drop multiplexers, one input-output of one of said secondary multiplexers is connected to a port of said primary ring of an access unit and said routing signals constitute control signals of said primary and secondary multiplexers.
3 more elements
A circuit switching system in a telecommunication network, including:
- an exchange;
- a set of access units, each of said access units having its own primary ring of add and drop primary multiplexers, each of said add and drop primary multiplexers being connected to user equipments, and
- control means for controlling said primary multiplexers, said control means including:
- means for receiving signaling transmitted by a user equipment connected to said access units, and
- means for producing routing signals corresponding to said signaling, said routing signals constituting control signals for said primary multiplexers of said set of access units for setting up a connection between said subscriber equipment and another subscriber equipment,
- wherein said telecommunication network is characterized has having a plurality of exchanges, said plurality of exchanges being arranged in a hierarchy, and said exchange of said circuit switching system being one exchange of said plurality of exchanges of said telecommunication network, and
- wherein when a connection is set up between two users, and both user have equipment connected to add and drop primary multiplexers of said exchange of said circuit switching system, said routing signals control said add and drop primary multiplexers to locally route the connection within said exchange, whereby the connection is not routed via an exchange at a higher level of hierarchy in said telecommunication network.
4 more elements
Dependencies are inferred from the claim text.