Broadcom Corporation

Avago Technologies International Sales Pte. Limited

Avago Technologies General IP (Singapore) Pte. Ltd.

Braodcom Corporation

Avago Technologies General IP Pte, Ltd.

Niki Roberta Pantelias

Lisa Voigt Denney

John Daniel Horton

Richard Stephen Prodan

Thomas J Kolze

Victor Hou

David Michael Pullen

Bruce Joseph Currivan

Shane Patrick Lansing

A Scott Hollums

Joel I Danzig

Jonathan S Min

Leo Montreuil

Sean Francis Nazareth

Mark Edward Laubach

Hooman Moshar

Gale Shallow

Francisco J Gomez

Thomas J Quigley

Avi Kliger

Roger Wayne Fish

Yushan Lu

Ramon Alejandro Gomez

Edward Wayne Boyd

Daniel Harvey Howard

Hanli Zou

David Dworkin

Kenneth G Zaleski, Ii

Taruna Tjahjadi

Son Dinh Nguyen

Young Vu

Yitshak Ohana

John D Horton, Jr

Scott Hollums

Gerald Grand

Dannie Gay

R Jeff Lee

Michael R Zelnick

David A Ferguson

Ba-Zhong Shen

Tak Kwan Lee

Dolors Sala

Ajay Chandra V Gummalla

Avraham Kliger

Anatoli Shindler

Victor T Hou

Thomas J Quigley, Jr

Tom Quigley

Andres Alvarez

Christopher John Plachta

Hagay Garti

Richard S Broadcom Corporation Prodan

Lisa Denney

David Roger Dworkin

Scott A Hollums

In some aspects, the disclosure is directed to methods and systems for overlapping orthogonal frequency-division multiple-access (OFDMA) channels for coexistence of devices and legacy devices, including DOCSIS 3.1 mid-split and high-split cable modems (CMs). Described are systems and methods for providing a CMTS with capability for managing overlapping OFDMA channels to support mid-split and high-split CMs, without modification to legacy CMs.

Overlapping OFDMA channels for coexistence of 3.1 mid-split and high-split cable modems

In some aspects, the disclosure is directed to methods and systems for interference mitigation and cancellation in full duplex amplifiers for cable modem or broadband communication systems. In many implementations, an interference canceller in the downstream path may be provided to equalize composite power on the FDX upstream subbands within a predetermined range of amplitude (e.g. X dB) from the desired downstream signal on the same subband, without affecting the downstream subbands.

North port interference mitigation in a full duplex (FDX) amplifier

A communication device (alternatively, device) includes a processor configured to support communications with other communication device(s) and to generate and process signals for such communications. In some examples, the device includes a communication interface and a processor, among other possible circuitries, components, elements, etc. to support communications with other communication device(s) and to generate and process signals for such communications. Such a communication device includes a processor configured to perform codeword builder functionality to generate information that undergoes error checking and correction (ECC) and/or forward error correction (FEC) coding. The processor intelligently selects packets from buffers to generate information blocks that undergo ECC and/or FEC coding and transmission and to meet certain latency constraints in conjunction with a predetermined period of time (e.g., a programmable threshold). Such a communication device may be implemented in a point-to-multipoint communication system that services multiple other communication devices.

Codeword builder for communication systems

A transmitter for use in a cable modem termination system includes a data processing module that generates a plurality of OFDM symbols from a data packet. A probe symbol generator generates a probe symbol, as one of a plurality of probe symbol types. The probe symbol is selectively inserted within the plurality of OFDM symbols, at a pre-defined probe symbol interval.

Communication system with proactive network maintenance and methods for use therewith

Embodiments provide solutions to reduce power utilization (either at individual cable modems or in the overall network) in future cable modem networks. Particularly, embodiments seek to reduce power utilization at individual cable modems and in the overall network, by allocating upstream frequency bands and/or transmission modulation schemes among cable modems while accounting for cable loss experienced by individual upstream cable modem transmissions. According to embodiments, frequency spectrum and modulation scheme allocation techniques are provided to optimize power utilization and enable lower upstream transmission power by cable modems while maintaining similar signal strength of received signals or lower signal strength with reduced SNR requirements using lower capacity modulation at the headend.

Frequency spectrum and modulation scheme allocation for high speed data networks

Embodiments include systems and methods for enabling a physical layer (PHY) link signaling channel between a network termination modem and a cable modem in a cable network. The PHY link signaling channel is embedded within the same multi-carrier channel as the data and enables PHY link up between the network termination modem and cable modern without involvement of higher layers (e.g., MAC). The PHY link signaling channel can be implemented in the downstream (from the network termination modem to the cable modem(s)) or in the upstream from a cable modem to the network termination modem. Embodiments are applicable to any known cable network, and particularly to cable networks implementing the DOCSIS and EPoC standards.

Physical layer (PHY) link signaling for cable networks

A communication device is configured to receive a message that indicates request opportunity parameter(s). Based on the request opportunity parameter(s), the communication device is configured to generate and transmit a transmission request within one of two or more request opportunities (e.g., 2, 3, 4, etc. or generally N request opportunities such that N is a positive integer greater than or equal to 2) indicated by the request opportunity parameter(s). The two or more request opportunities are included within mini-slot(s) that span OFDM sub-carrier(s) of OFDM or OFDMA framing. A given mini-slot spans an OFDM or OFDMA frame, and a mini-slot is divided into any desired number of portions (e.g., 2, 3, 4, etc. or generally N portions) such that each of the request opportunities within that mini-slot occupies a common fraction of the mini-slot (e.g., each occupies &#xbd;, &#x2153;, &#xbc;, etc. or generally 1/N of the mini-slot).

Half-frame request opportunities and operation within wired and/or wireless communication systems

A method, system and computer program product to schedule transmissions in a two-tier network are provided. In an example, the system includes a Data Over Cable Service Interface Specification (DOCSIS) scheduler configured to generate a MAP message to allocate bandwidth and a first instance in time to a cable modem to transmit data to a branch node. The system further includes a MAP message translator coupled to the DOCSIS scheduler and configured to determine a second instance in time at which data from the cable modem arrives at the branch node and generate a GATE message that grants the branch node bandwidth to transmit the data received from the cable modem at the second instance in time to a headend node.

Scheduling in a two-tier network

A communication device is configured to communicate coded information to other communication device(s). The communication device uses NCPs to indicate locations of codewords within signal(s) transmitted to the other communication device(s). The communication device is configured to encode NCP(s) using an FEC code to generate coded NCP(s) and also to encode the NCP(s) using a cyclic redundancy check (CRC) code to generate NCP CRC bits. The communication device is also configured to encode the NCP CRC bits using the FEC code to generate coded NCP CRC bits. The communication device is then configured to generate OFDM or OFDMA symbol(s) include the coded NCP(s) and the coded NCP CRC bits to indicate beginnings of codeword(s) within at least one of the OFDM symbol(s) and/or additional OFDM symbol(s). The communication device is also configured to transmit the OFDM or OFDMA symbols to another communication device via a communication interface of the communication device.

Combining CRC and FEC on a variable number of NCPs

A new protocol uses a trigger message to identify one or more symbols transmitted between a first and a second communication device. The first device generates and transmits a trigger message to the second device. This process may be initiated based on the first device receiving a measurement initiation message from another device (e.g., such as the second device or another device within the system). Then, the first device transmits a signal that includes those one or more symbols to the second device. Before or during transmission, the first device generates a first capture of those one or more symbols. After receipt of the transmission from the first device, the second device performs a second capture of those one or more symbols identified within the trigger message. Then, any device having the first and second captures can determine a characterization of the communication pathway between the first and second devices.

Trigger synchronized event for channel characterization within communication systems

A system and method for allowing flexible associations between PHY devices and MAC devices in a point-to-multipoint communications system, such that a given upstream channel is not deterministically bound to a particular MAC device. An upstream MAC device may connect to a varying number of PHY devices depending on configured PHY capacity. Upstream service flows are intact by noting Service identifiers (SIDs) of each burst received at a PHY device. A burst is then directed via a switching infrastructure to the appropriate MAC on the basis of the SID.

Flexible MAC/PHY association

A cable modem that supports stateless requesting and/or limited contention-based requesting is provided herein. In an example, a physical layer (PHY) configured to communicate over a plurality of upstream channels is provided. A bandwidth requester is provided to request bandwidth using contention-based requesting over a first subset of the upstream channels for contention-based flows and request bandwidth using stateless requesting over a second subset of the upstream channels for stateless flows.

Solutions for upstream channel bonding

Embodiments include systems and methods for enabling a physical layer (PHY) link signaling channel between a network termination modem and a cable modem in a cable network. The PHY link signaling channel is embedded within the same multi-carrier channel as the data and enables PHY link up between the network termination modem and cable modem without involvement of higher layers (e.g., MAC). The PHY link signaling channel can be implemented in the downstream (from the network termination modem to the cable modem(s)) or in the upstream from a cable modem to the network termination modem. Embodiments are applicable to any known cable network, and particularly to cable networks implementing the DOCSIS and EPoC standards.

Growing community of inventors

Duluth, GA, United States of America

Niki Roberta Pantelias