Wired communication system including asymmetrical physical layer devices
AssigneeAxonne, Inc.
InventorWilliam Lo
Life of this patent
Estimating the term…
Abstract
A first physical layer device includes a first transmitter and a first receiver. The first transmitter transmits first data to a second physical layer device over a medium at a first line rate during a first transmit period. The first receiver is configured to not receive data during the first transmit period and an echo reflection period occurring after the first transmit period. The echo reflection period is based on a length of the medium between the first physical layer device and the second physical layer device. The first receiver is configured to, after the echo reflection period, receive second data from the second physical layer device over the medium at a second line rate that is less than the first line rate.
Claims16
A first physical layer device, comprising:
- a first transmitter configured to send first transmit bursts on a cable at a first line rate during a first transmit period to a second physical layer device, wherein the first transmit bursts include a training header and a training frame including a timing field;
- a first receiver configured to receive second transmit bursts on the cable at a second line rate during a second transmit period from the second physical layer device,
- wherein, during a normal operating mode, the first line rate is greater than or equal to the second line rate and the first transmit period is greater than or equal to the second transmit period, and
- wherein the first transmitter and first receiver communicate asymmetrically with the second physical layer device;
- and
- a delay calculator configured to selectively adjust a first quiet period between an end of the first transmit bursts from the first transmitter and echo caused by a start of the second transmit bursts from a slave transmitter of the second physical layer device.
A first physical layer device, comprising:
- a first transmitter configured to send first transmit bursts on a cable at a first line rate during a first transmit period to a second physical layer device, wherein the first transmit bursts include a training header and T frames, where T is an integer greater than zero;
- and
- a first receiver configured to receive second transmit bursts on the cable at a second line rate during a second transmit period from the second physical layer device, wherein the second transmit bursts include a training header and P frames, where P is an integer greater than zero,
- wherein, during a normal operating mode, the first line rate is greater than or equal to the second line rate and the first transmit period is greater than the second transmit period,
- wherein a transmit cycle includes one of the first transmit bursts and one of the second transmit bursts, and
- wherein the first transmitter transmits in-band data including B bytes over two or more of the T frames, where B is an integer greater than one.
A first physical layer device, comprising:
- a first transmitter configured to send first transmit bursts on a cable at a first line rate during a first transmit period to a second physical layer device, wherein the first transmit bursts include a training header and a training frame including a timing field;
- a first receiver configured to receive second transmit bursts on the cable at a second line rate during a second transmit period from the second physical layer device,
- wherein, during a normal operating mode, the first line rate is greater than or equal to the second line rate and the first transmit period is greater than or equal to the second transmit period, and
- wherein the first transmitter and first receiver communicate asymmetrically with the second physical layer device;
- and
- a frequency offset calculator configured to calculate a local frequency adjustment based on a first symbol rate of the first line rate and a grandmaster clock.
Dependencies are inferred from the claim text.