Broadcom Corporation

Avago Technologies International Sales Pte. Limited

Avago Technologies General IP (singapore) Pte. Ltd.

Other

Avago Technologies General IP Pte, Ltd.

Mehmet Vakif Tazebay

Ahmad Chini

Peiqing Wang

Scott R Powell

Chung Ming Tu

Wael William Diab

Ba-Zhong Shen

Xiaotong Lin

Linghsiao Wang

Bruce Howard Conway

Yencheng Chen

Bazhong Shen

Sang Bui

Seyed Hamidi

Yongbum Kim

Kevin Brown

Randall Bret Perlow

Sesha Thalpasai Panguluri

Santanu Sinha

Neven Pischl

Mohammad Tabatabai

James M Graba

Mehdi Tavassoli Kilani

Manfred Wagner

William Gene Bliss

Bruce Conway

A system to implement a communication line coding scheme using a non-complex bit-to-symbol mapping, a forward error correction (FEC) coding, and an additive bit scrambler after the FEC at the PHY layer is provided. The system may be a part of or implemented by an automobile component. The system may be a PHY device configured to convert data from the MAC layer into 2D-PAM3 symbols that are transmitted across a communication link at a predetermined transmission rate, such as to be compliant with a communication standard. The PHY device may select characteristics of the conversion, such as the FEC coded symbol, based on the target transmission rate. The PHY device may include a transceiver, and may convert the data from MAC layer to PHY layer and back.

Robust line coding scheme for communication under severe external noises

A primary device implementing the subject system of link establishment for single pair Ethernet may include at least one processor. The at least one processor may be configured to transmit a first synchronization sequence to a secondary device, detect a second synchronization sequence transmitted by the secondary device, the second synchronization sequence differing from the first synchronization sequence, and after detection of the second synchronization sequence, initiate a training stage, the train stage comprising exchanging training frames with the secondary device. The at least one processor may be further configured to enter a data mode for data transmissions after completion of the training stage, the data transmissions being distinct from the training frames. In the data mode, data may be forward error correction encoded and then scrambled.

Transition timing and training stage operation

In some aspects, the disclosure is directed to methods and systems for a device including a physical interface with electrical connection to a communication channel, and circuitry configured to detect energy received at the physical interface, wait a predetermined length of a time until the beginning of a time slot, monitor the physical interface during the time slot for a predefined pattern from the communication channel, and upon detection of the predefined pattern, transition the device to an increased-power mode.

Network energy consumption reduction

A transceiver system includes a transmitter circuit having a line driver with a programmable signal level to generate a transmit signal for transmission in an automotive environment over an unshielded-twisted pair (UTP) cable. The transceiver system further includes a physical layer (PHY) receiver. The PHY receiver includes a high-pass filter (HPF), an adaptive feed-forward equalizer (FFE) block and a noise aware adaptation block. The HPF rejects transient noise of a received signal, and the FFE block receives a digital signal and adaptively filters out narrowband continuous wave (CW) noise using an adaptation signal. The digital signal is based on the received signal, and the noise aware adaptation block receives an error signal and generates the adaptation signal. The error signal is generated based on an equalized signal of the FFE block and an estimated signal. The combined transmit and receive circuitry allow lowering emission while rejecting strong receiver automotive noises.

Emission control for receiver operating over UTP cables in automotive environment

Synchronization and training stage operation

Currently, there exists low power Ethernet PHY solutions running at 10 Gbps over twin-ax cables with SFP+ connectors. However, the cost and range of these cables, along with the size of the connectors, do not match the requirements of in-vehicle networks. If the cable is replaced with a single pair of shielded or coaxial cables, a different mechanism is needed to provide bi-directional communication. Time division duplexing (TDD) can be used to emulate full duplex communication over the single pair of cables by taking turns, in time, transmitting data over the pair of cables in each direction.

Robust electromagnetic compatibility performance for in-vehicle Ethernet PHYs utilizing time division duplexing

Systems and methods for implementing an Energy-Efficient Ethernet (EEE) communication are provided. In some aspects, a method includes identifying an EEE signal configured to be communicated via a first set of wires. The method also includes processing the EEE signal such that the processed EEE signal is configured to be communicated via a second set of wires. The second set of wires including fewer wires than the first set of wires. The method also includes communicating the processed EEE signal via the second set of wires.

Systems and methods for implementing energy-efficient ethernet communications

The present disclosure is directed to apparatuses for preventing significant amounts of common mode noise from a PHY transceiver, such as an Ethernet PHY transceiver, from coupling to an unshielded twisted-pair cable. The apparatuses can provide common mode noise isolation, while limiting any common mode noise to differential mode noise (CM-DM) conversion. Common mode noise is generally ignored by a PHY transceiver that receives a differential data signal because of differential signaling. However, when common mode noise is converted to differential mode noise, then data errors can result. Thus, limiting any CM-DM conversion is important.

Magnetic circuit for high speed automotive ethernet over UTP channels

A circuit for power on data line (PoDL) injection includes a power source, a first and a second coupling component, and an interface. The power source provides one or more DC voltage levels. The first coupling component couples the power source to an interface for coupling to a transmission medium. An Ethernet device is coupled through the second coupling component to the interface. The first coupling component is a balanced component, and the Ethernet device is isolated from the power source via a pair of DC blocking capacitors connected between the first coupling component and the second coupling component.

Power coupling circuits for single-pair ethernet with automotive applications

The present disclosure provides an apparatus and method for measuring echo responses of communication links used in in-vehicle networks with high resolution and high dynamic range, allowing for diagnostics of various failures and/or degradations with high precision. Additional information can be provided to indicate signaling quality, insertion loss, and return loss of the communication links used in in-vehicle networks. Together, these measures and information can provide a comprehensive diagnostic capability that improves network reliability and safety of in-vehicle networks.

Comprehensive high resolution cable diagnostics for in-vehicle Ethernet PHYs

A primary device implementing the subject system of link establishment for single pair Ethernet may include at least one processor circuit. The at least one processor circuit may be configured to transmit a first synchronization sequence to a secondary device and to subsequently detect a second synchronization sequence, different than the first, transmitted by the secondary device. The synchronization sequences may be pseudo-noise sequences that have strong autocorrelation characteristics. The at least one processor circuit may be configured to wait a predetermined amount of time after completing the detection of the second synchronization sequence, and then may initiate a training stage. The training stage may include exchanging scrambler states of additive scramblers used by the primary and secondary devices. The at least one processor circuit may be configured to enter a data mode upon completion of training. In the data mode, data is forward error correction encoded and then scrambled.

Network node modules within a vehicle are arranged to form a reconfigurable automotive neural network. Each network node module includes one or more subsystems for performing one or more operations and a local processing module for communicating with the one or more subsystems. A management system enables traffic from the one or more subsystems of a particular network node module to be re-routed to an external processing module upon failure of the local processing module of that particular network node module.

Growing community of inventors

Irvine, CA, United States of America

Mehmet Vakif Tazebay