Multi-carrier frequency-division multiplexing (FDM) architecture for high speed digital service
First Claim
1. A method of providing bi-directional communication in a cable transmission network between a first device and a second device, the method comprising the steps of:
- allocating a first downstream bandwidth having a downstream frequency channel via a controller based on a first non-shared time slot assignment in a downstream packet, and a first upstream bandwidth having a first non-shared upstream frequency channel for a first full duplex point-to-point channel between the first device and the second device via the controller;
conveying high priority data traffic over the first full duplex point-to-point channel between the first device and the second device, wherein the high priority data traffic between the first device and the second device communicates Ethernet/802.3 frames;
converting the Ethernet/802.3 frames to frame management sublayer (FMS) frames;
multiplexing the FMS frames to provide MPEG frames; and
modulating the MPEG frames to provide RF data, wherein the RF data is transmitted in the downstream frequency channel.
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Accused Products
Abstract
An architecture for providing high-speed access over frequency-division multiplexed (FDM) channels allows transmission of ethernet frames and/or other data across a cable transmission network or other form of FDM transport. The architecture involves downstream and upstream FDM multiplexing techniques to allow contemporaneous, parallel communications across a plurality of frequency channels. Furthermore, the architecture allows a central concentrator to support a plurality of remote devices that each have guaranteed bandwidth through connection-oriented allocations of bi-directional data flows. The upstream and downstream bandwidth allocation can support symmetrical bandwidth as well as asymmetrical bandwidth in either direction. The architecture generally can be used to support connection-oriented physical layer connectivity between a remote device and the central concentrator. Furthermore, the architecture may be integrated into other higher level devices such as, but not limited to, bridges, switches, routers, and/or gateways. The architecture generally may peacefully coexist with other services commonly-found in cable distribution networks.
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Citations
19 Claims
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1. A method of providing bi-directional communication in a cable transmission network between a first device and a second device, the method comprising the steps of:
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allocating a first downstream bandwidth having a downstream frequency channel via a controller based on a first non-shared time slot assignment in a downstream packet, and a first upstream bandwidth having a first non-shared upstream frequency channel for a first full duplex point-to-point channel between the first device and the second device via the controller; conveying high priority data traffic over the first full duplex point-to-point channel between the first device and the second device, wherein the high priority data traffic between the first device and the second device communicates Ethernet/802.3 frames; converting the Ethernet/802.3 frames to frame management sublayer (FMS) frames; multiplexing the FMS frames to provide MPEG frames; and modulating the MPEG frames to provide RF data, wherein the RF data is transmitted in the downstream frequency channel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system that provides bi-directional communication in a cable transmission network between a first device and a second device, the system comprising:
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logic configured to allocate first downstream bandwidth on at least one downstream frequency channel based on at least one first non-shared time slot assignment in at least one downstream packet and first upstream bandwidth of at least one first non-shared upstream frequency channel for a first full duplex point-to-point channel; a transmit side device comprising; a converter for converting Ethernet/802.3 frames into frame management sublayer (FMS) frames; a multiplexer for multiplexing the FMS frames into MPEG frames; and a modulator for modulating the MPEG frames to provide RF data wherein the RF data is transmitted in the at least one downstream frequency channel; and logic configured to convey a first upstream and downstream data flow over the first full duplex point-to-point channel. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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Specification