Point-to-point protocol termination device
First Claim
1. A Point-to-Point Protocol (PPP) termination device in an access network system by which a subscriber gets access to a backbone network, comprising:
- a first interface to a Digital Subscriber Line Access Multiplexer (DSLAM);
a second interface to a backbone network;
a Point-to-Point Protocol (PPP) link controller for establishing and disconnecting a PPP link;
a header processor for converting between a network-layer packet and a PPP data packet including the network-layer packet and; and
a switch for switching a connection among the first interface, the second interface, the PPP link controller, and the header processor, depending on which one of a PPP data packet and a link control packet is inputted, wherein the link control packet is used for link establishment and disconnection.
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Accused Products
Abstract
A PPP termination device allowing PPP termination at a location where a decreased number of subscriber'"'"'s signals are multiplexed is disclosed. The PPP termination is performed in an access gateway including a switch in the access network system. The access gateway includes a first interface to a DSLAM, a second interface to a backbone network, and a header processor for converting between a network-layer packet and a PPP data packet including the network-layer packet. The switch switches a connection among the first interface, the second interface, the PPP link controller, and the header processor, depending on which one of a PPP data packet and a link control packet is inputted. The link control packet is used for link establishment and disconnection.
126 Citations
12 Claims
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1. A Point-to-Point Protocol (PPP) termination device in an access network system by which a subscriber gets access to a backbone network, comprising:
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a first interface to a Digital Subscriber Line Access Multiplexer (DSLAM);
a second interface to a backbone network;
a Point-to-Point Protocol (PPP) link controller for establishing and disconnecting a PPP link;
a header processor for converting between a network-layer packet and a PPP data packet including the network-layer packet and; and
a switch for switching a connection among the first interface, the second interface, the PPP link controller, and the header processor, depending on which one of a PPP data packet and a link control packet is inputted, wherein the link control packet is used for link establishment and disconnection.
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2. A Point-to-Point Protocol. (PPP) termination device in an access network system by which a subscriber gets access to a backbone network, comprising:
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a first interface for inputting and outputting PPP packets in Asynchronous Transfer Mode (ATM) cells from and to a corresponding Digital Subscriber Line Access Multiplexer (DSLAM);
a second interface for inputting and outputting network-layer packets in ATM cells from and to the backbone network;
a PPP link controller for establishing and disconnecting a PPP link;
a packet processor for converting between a network-layer packet and A PPP data packet including the network-layer packet and controlling cell forwarding; and
an ATM switch for switching ATM cells among the first interface, the second interface, the PPP link controller, and the packet processor, depending on which one of a PPP data packet in ATM cells and a link control packet in ATM cells is inputted, wherein the link control packet is used for link establishment and disconnection. - View Dependent Claims (3, 4, 5, 6)
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7. A Point-to-Point Protocol (PPP) termination device in an access network system by which a subscriber gets access to a backbone network, comprising:
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a first interface for inputting and putting PPP packets over SONET (Synchronous Optical NETwork) from and to a corresponding Digital Subscriber Line Access Multiplexer (DSLAM), wherein the first interface includes a first packet processor for determining which one of a PPP data packet and a link control packet is inputted, converting between a packet and ATM cells, and controlling cell forwarding;
a second interface for inputting and outputting network-layer packets over SONET from and to the backbone network, wherein the second interface includes a second packet processor for converting between a network-layer packet and a PPP data packet including the network-layer packet, converting between a packet and ATM cells, and controlling cell forwarding;
a PPP link controller for establishing and disconnecting a PPP link; and
an ATM switch for switching ATM cells among the first interface, the second interface, and the PPP link controller, depending on which one of a PPP data packet and a link control packet is inputted. - View Dependent Claims (8, 9, 10, 11)
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12. An access network system comprising:
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a plurality of subscriber computers;
a plurality of Remote ADSL Transceiver Units (ATU-Rs) each connected to the subscriber computers;
a plurality of Digital Subscriber Line Access Multiplexers (DSLAMs), each of which accommodates a plurality of ATU-Rs;
an access gateway to a backbone network, the access gateway accommodating a plurality of DSLAMs, wherein the access gateway comprises;
a first interface to a corresponding Digital Subscriber Line Access Multiplexer (DSLAM);
a second interface to the backbone network;
a Point-to-Point Protocol (PPP) link controller for establishing and disconnecting a PPP link with an ATU-R;
a header processor for converting between a network-layer packet and a PPP data packet including the network-layer packet and; and
a switch for switching a connection among the first interface, the second interface, the PPP link controller, and the header processor, depending on which one of a PPP data packet and a link control packet is inputted, wherein the link control packet is used for link establishment and disconnection.
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Specification