Multiplex communications – Pathfinding or routing – Switching a message which includes an address header
Reexamination Certificate
1999-06-24
2001-03-06
Ton, Dang (Department: 2732)
Multiplex communications
Pathfinding or routing
Switching a message which includes an address header
Reexamination Certificate
active
06198745
ABSTRACT:
TECHNICAL FIELD
The present invention relates generally to asynchronous transfer mode (ATM) based very-high-bit-rate digital subscriber line (VDSL) communications for providing video and data services and, more particularly, to an ATM based VDSL communication system for providing video and data alarm services between an alarm service provider and a subscriber.
BACKGROUND ART
Alarm service providers have provided alarm services to their customers using telephone dial systems, limited low speed data on metallic copper wire pair systems, low speed wireless systems, and dedicated line services. In general, these systems transmit data too slow, are too expensive, and require too many resources to satisfy the demand for providing alarm services to a greater mass of subscribers. Very-high-bit-rate subscriber line (VDSL) communication systems provide high speed video and data transmission between service providers and their subscribers at a relatively low cost with fewer resources needed per subscriber. For the foregoing reasons, there is a need for an ATM based VDSL communication system and associated method for providing video and data alarm services between an alarm service provider and a subscriber that overcome the limitations of the prior art.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to provide an asynchronous transfer mode (ATM) based very-high-bit-rate digital subscriber line (VDSL) communication system for providing video and data alarm services between an alarm service provider and a subscriber.
It is another object of the present invention to provide an ATM based VDSL communication system in which video and data alarm services provided by an alarm service provider to a subscriber can be switched between data alarm services during normal conditions and video alarm services during alarm conditions.
It is a further object of the present invention to provide an ATM based VDSL communication system in which an alarm service provider can share the same twisted pair drop with another information provider to a subscriber.
In carrying out the above objects and other objects, the present invention provides an asynchronous transfer mode (ATM) based very-high-bit-rate digital subscriber line (VDSL) communication system for providing alarm services between an alarm service provider and a subscriber. The ATM based VDSL communication system includes an ATM network connected to an alarm service provider. A host digital terminal is connected to the ATM network by an ATM permanent virtual circuit. The ATM permanent virtual circuit is supported on a fiber optics link. The host digital terminal and the alarm service provider communicate alarm signals on the ATM permanent virtual circuit through the ATM network. An optical network unit is connected to the host digital terminal by a fiber optics link. A customer provided equipment (CPE) data device is connected through the optical network unit to the host digital terminal by a well known VDSL permanent virtual circuit. The well known VDSL permanent virtual circuit is supported on a fiber optics link between the host digital terminal and the optical network unit and a twisted pair link between the optical network unit and the CPE data device. The CPE data device and the host digital terminal communicate alarm signals on the well known VDSL permanent virtual circuit. A subscriber terminal unit is connected to the CPE data device for communicating alarm signals with the CPE data device. The host digital terminal connects the ATM permanent virtual circuit and the well known VDSL permanent virtual circuit to communicate the alarm signals between the alarm service provider and the subscriber terminal unit.
Preferably, the ATM permanent virtual circuit is selected by the host digital terminal from a plurality of ATM permanent virtual circuits for connection to the well known VDSL permanent virtual circuit. The host digital terminal switches between a first ATM permanent virtual circuit for communicating data alarm signals between the alarm service provider and the subscriber terminal unit and a second ATM permanent virtual circuit for communicating video alarm signals between the alarm service provider and the subscriber terminal unit. The host digital terminal switches between the first and second ATM permanent virtual circuits in response to an ATM permanent virtual circuit request data signal from the subscriber terminal unit.
Further, in carrying out the above objects and other objects, the present invention provides another ATM based VDSL communication system having an ATM network connected to an alarm service provider and an information service provider. A host digital terminal is connected to the ATM network by first and second ATM permanent virtual circuits. The first and second ATM permanent virtual circuits are supported on a fiber optics link. The host digital terminal and the alarm service provider communicate alarm signals on the first ATM permanent virtual circuit through the ATM network. The host digital terminal and the information service provider communicate information signals on the second ATM permanent virtual circuit through the ATM network. An optical network unit is connected to the host digital terminal by a fiber optics link. A customer provided equipment (CPE) data device is connected through the optical network unit to the host digital terminal by first and second well known VDSL permanent virtual circuits. The first and second well known VDSL permanent virtual circuits are supported on a fiber optics link between the host digital terminal and the optical network unit and a twisted pair link between the optical network unit and the CPE data device. The CPE data device and the host digital terminal communicate alarm signals on the first and second well known VDSL permanent virtual circuits. A subscriber alarm terminal unit is connected to the CPE data device by a first 10baseT port for communicating alarm signals with the CPE data device. A subscriber information terminal unit is connected to the CPE data device by a second 10baseT port for communicating information signals with the CPE data device. The host digital terminal connects the first ATM permanent virtual circuit and the first well known VDSL permanent virtual circuit to communicate the alarm signals between the alarm service provider and the subscriber alarm terminal unit and connects the second ATM permanent virtual circuit and the second well known VDSL permanent virtual circuit to communicate the information signals between the information service provider and the subscriber information terminal unit.
The above objects and other objects, features, and advantages of the present invention will be apparent from the following detailed description of the best mode for carrying out the invention when taken in connection with the accompanying drawings.
REFERENCES:
patent: 6044079 (2000-03-01), Calvignac et al.
patent: 6046983 (2000-04-01), Hasegawa et al.
Brooks & Kushman P.C.
Qwest Communications International Inc.
Ton Dang
LandOfFree
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