Precoding during link establishment
AssigneeIntel Corporation
InventorsAndrew K. LILLIE, Itamar LEVIN, Yaniv SABAG, Kent C. LUSTED
Life of this patent
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Abstract
Examples described herein relate to an Ethernet physical layer transceiver (PHY) circuitry for use in frame communication with a remote link partner. In some example, the Ethernet PHY circuitry can include Physical Medium Dependent (PMD) circuitry and transmitter circuitry and receiver circuitry for use in the frame communication. In some examples, the PMD circuitry is to perform link training with a partner transmitter and selectively request the partner transmitter to apply a modulation scheme with precoding during the link training based on a magnitude of one or more equalizer coefficient values.
Claims19
An apparatus comprising:
- Ethernet physical layer transceiver (PHY) circuitry for use in frame communication with a remote link partner, the Ethernet PHY circuitry comprising:
- Physical Medium Dependent (PMD) circuitry;
- and
- transmitter circuitry and receiver circuitry for use in the frame communication, wherein:
- the PMD circuitry is to perform link training with a partner transmitter and selectively request the partner transmitter to apply a modulation scheme with precoding during the link training based on a magnitude of one or more equalizer coefficient values,
- the modulation scheme comprises Pulse Amplitude Modulation 4-level (PAM-4) or Pulse Amplitude Modulation 6-level (PAM-6), and
- the request the partner transmitter to apply the modulation scheme with precoding during the link training comprises transmission of a control signal to the partner transmitter.
A non-transitory computer-readable medium comprising instructions stored thereon, that if executed by one or more processors, cause the one or more processors to:
- execute an operating system (OS) to configure circuitry of a network interface device to:
- enable performance of link training and selectively request a partner transmitter to use a modulation scheme with precoding during the link training based on a magnitude of one or more equalizer coefficient values.
A method comprising:
- Physical Medium Dependent (PMD) circuitry performing link training with a partner transmitter and selectively request the partner transmitter to apply a modulation scheme with precoding during the link training based on a magnitude of one or more equalizer coefficient values, wherein the modulation scheme comprises Pulse Amplitude Modulation 4-level (PAM-4) or Pulse Amplitude Modulation 6-level (PAM-6).
Dependencies are inferred from the claim text.