Abstract:
A method of categorizing a data packet or frame, such as an Ethernet packet or a Sonet frame, where one or more features of the packet or frame are identified and a corresponding priority assigned. At least two priorities, a higher and a lower priority, are used. If none of the sought after features are identified, such as if the packet or frame is of an unknown type, the packet or frame is assigned the higher priority.
Abstract:
A method for providing broadband communications over a multi-layered network having a plurality of Open System Interconnection (OSI) Reference Model layers functioning therein includes monitoring at least one OSI reference model layer functioning in the multi-layered network. A quality of service event is determined whether to have occurred in the multi-layered network. The quality of service event is determined to have occurred at a layer N in the OSI reference model. Network provisioning is changed at a layer less than N in response to the quality of service event, and a signal is provided when the network provisioning at the layer less than N has been changed. A system for providing broadband communications includes a multi-layered network, a network monitor, and a network controller. The multi-layered network has a plurality of Open System Interconnection (OSI) reference model layers functioning therein. The network monitor is coupled to the multi-layered network, and the network monitor is adapted to monitor at least one OSI reference model layer functioning in the multi-layered network, determine that a quality of service event has occurred in the multi-layer network, and determine that the quality of service event occurred at a layer N in the OSI reference model. The network controller is coupled to the multi-layered network, and the network monitor is adapted to respond to the quality of service event in the multi-layered network by changing the network provisioning at a layer less than N.
Abstract:
A communication system. The system includes an MPLS network (12) and a modified ATM network (14) connected to the MPLS network (12) on which MPLS packets can travel. A switch (16) for switching MPLS packets and ATM cells in a network. The switch includes input ports (23) for receiving MPLS packets and ATM cells from the network. Each MPLS packet has a first label for directing the packet to a desired switch and a second label for directing the packet to a desired output port (24) in the switch. The system includes output ports for sending MPLS packets and ATM cells to the network. The system includes a mechanism for reviewing the second label while maintaining the first label with the packet. The reviewing mechanism is connected to the input ports and the output ports.
Abstract:
A method for providing broadband communications over a multi-layered network having a plurality of Open System Interconnection (OSI) Reference Model layers functioning therein includes monitoring at least one OSI reference model layer functioning in the multi-layered network. A quality of service event is determined whether to have occurred in the multi-layered network. The quality of service event is determined to have occurred at a layer N in the OSI reference model. Network provisioning is changed at a layer less than N in response to the quality of service event, and a signal is provided when the network provisioning at the layer less than N has been changed. A system for providing broadband communications includes a multi-layered network, a network monitor, and a network controller. The multi-layered network has a plurality of Open System Interconnection (OSI) reference model layers functioning therein. The network monitor is coupled to the multi-layered network, and the network monitor is adapted to monitor at least one OSI reference model layer functioning in the multi-layered network, determine that a quality of service event has occurred in the multi-layer network, and determine that the quality of service event occurred at a layer N in the OSI reference model. The network controller is coupled to the multi-layered network, and the network monitor is adapted to respond to the quality of service event in the multi-layered network by changing the network provisioning at a layer less than N.
Abstract:
A switch (620, 650) to provide multi-service internetworking between multiple protocols (e.g., SS7, frame relay) using asynchronous transfer mode (ATM) routing. The switches (620, 650) receive traffic from multiple sources using multiple protocols, convert the traffic to ATM cells and providing routing of the ATM cells. The switches (620, 650) also receive traffic from the ATM network (640) and route the traffic to the appropriate devices (600, 670). Traffic from multiple sources using multiple protocols can be routed in a single ATM connection (e.g., virtual path, virtual connection). When the bandwidth of an ATM connection is reserved or consumed by traffic routed between switches (620, 650), additional ATM connections between the source and destination switches (620, 650) can be established to carry the additional traffic.
Abstract:
A method for establishing a multimedia connection with quality of service (QoS) using an ATM backbone (100) for ISDN network or IP network calls. QoS makes IP over ATM useful for video and audio conferencing by ensuring a minimum packet error rate at acceptable bit transmission rates. The invention will utilize the H.323 annex C protocol to transmit IP gateway transmissions through an ATM backbone network. This invention enables H.320 endpoints (102, 106) having a connection to an ATM network (100) to send QoS communications to other endpoints. When call setup is initiated between two endpoints, an ISDN (or IP) call is sent to a gateway (104, 108). The gateway will utilize a network gatekeeper (103) to route the call to the addressed endpoint's corresponding gateway. When a route is established, the call will be converted to an H.323 annex C protocol transmission and sent through the ATM backbone (100) to the destination gateway. At the destination gateway, the call will be converted to another protocol (as necessary) for delivery to the destination endpoint.
Abstract:
Multimedia information, voice, video, image, and data, is transported over a cell switching communications network to a multimedia switch that performs cell to frame and frame to cell conversions. With a negotiated quality of service and explicit rate flow control with RM cell priority, the frames are transported over a high-speed link to a remote desktop, which contains an Ethernet type network interface device for processing the frames. The high-speed link is typically a digital subscriber line twisted pair or coaxial cable via a cable modem.
Abstract:
The invention relates to a method and a gateway (N1) for transmitting data from a first router (R1) to a second router (R2) via an external communications network (ATM), which makes it possible to couple notably local networks (LAN1, LAN2) connected to these routers. The first router (R1) is connected to the communications network (ATM) via a gateway (N1) which, among other things, is used for conversion between a transmission protocol used by the first router (R1) and a transmission protocol used by the communications network (ATM). The first router assigns to the data a hardware address (MAC2) which identifies the second router (R2) and constitutes a target address. In the gateway (N1) a network address (ATM2) which identifies an output point (N2) from the communications network is assigned to this target address. On the basis of this network address the data are transmitted to the output point (N2) of the communications network and from there to the second router (R2).
Abstract:
An SOH (101) of an SDH (SONET) transmission frame is terminated/added on the sender- and receiver-side transmitters and the information in the other regions (102, 103) including the administration pointer (102) is divided into ATM cells evenly at the sending-side transmitter (3 or 4) and the ATM cells are transmitted into an ATM network (2). The ATM cells are reconstructed to the original state at the receiver-side transmitter (4 or 3), thereby to maintain, operate and administrate the lines (sections) independently before and after the ATM network and to realize the processing (ATM-cellulation/reconstruction) independently of the difference between the administration pointer (102) and the payload (103) and the number of path signals (104) multiplexed in the payload (103).
Abstract:
Voice over Digital Subscriber Line (VoDSL) is an emerging technology, and as such requires subscriber acceptance and take-up both for the future development of this technology and to repay access network operator investment in VoDSL equipment. The present invention provides an improved equipment architecture and improved methods of separating VoDSL equipment to enhance performance and/or enable the provision of improved services. In one aspect the invention provides a Digital Access System (DAS) Customer Premises Equipment (CPE) comprising: an internal packet switched network comprising a switch; a DAS modem connected to said internal network and arranged such that in use the internal network is coupled to an external packet switched network by a DAS link over an access network; a controller arranged to control said switch in order to establish packet transfer paths between said modem and one or more internal network interfaces to customer appliances connected to the CPE in order to complete calls between said appliances and entities on the external network; wherein the CPE is arranged to reconfigure parameters corresponding to a first layer dependent on parameters corresponding to a second layer.