Marvell Asia Pte., Ltd.

KongHoei Susanto Lim

Seid Alireza Razavi Majomard

David H Shen

A method of operating an Ethernet transceiver includes initializing the Ethernet transceiver during a training mode of operation by monitoring background link operating characteristics with on-chip circuitry during a non-data-transfer interval to establish a baseline alien crosstalk value. Training data is then transmitted at a first transmit power level and first data rate to a link partner during a data transfer interval. The link is monitored with the on-chip circuitry during the data transfer interval to detect feedback indicating alien crosstalk effects to neighboring Ethernet links due to the transmitting. The first data rate and/or first transmit power level is then adjusted to an adjusted second data rate and/or second transmit power level based on the feedback. The Ethernet transceiver is then operated in a normal data transfer mode utilizing the adjusted second data rate and/or transmit power level.

Data rate and transmit power adjustments for data transmission over an ethernet link based on detected crosstalk

A network switch includes a plurality of Ethernet ports having their respective Physical (PHY) Layers interconnected via a common interface local to the network switch. The common interface passes local information among respective PHY layers of the Ethernet ports. One or more receivers receive for a first Ethernet port, over the common interface, information indicative of alien cross talk affecting at least one second Ethernet port of the network switch. A transmission attribute controller adjusts, based on the received information indicative of alien cross talk affecting the at least one second Ethernet port of the network switch, a first data rate and/or a first transmit power level to a second data rate and/or a second transmit power level for transmitting data to a remote network device. A first transmitter transmits data via the first Ethernet port according to the second data rate and/or the second transmit power level.

Ethernet link transmit power and rate adjustment based on alien crosstalk feedback

A method of operation on an Ethernet network having multiple Ethernet links interconnected via a network device. The method includes detecting installation of a new Ethernet link in the Ethernet network utilizing the network device. A link training process is then initiated for the new Ethernet link. The link training process includes transmitting training data at a first transmit power level and first data rate to a link partner during a data transfer interval. Network feedback information is then accessed, including performance metrics associated with the multiple Ethernet links during the training data transfer interval. The first data rate and/or first transmit power level are then adjusted to an adjusted second data rate and/or second transmit power level based on the network feedback information.

Ethernet link transmit power method based on network provided alien crosstalk feedback

Ethernet link transmit power method based on on-chip detected alien crosstalk feedback

A method of operating an Ethernet transceiver includes initializing the Ethernet transceiver during a training mode of operation by transmitting training data to a link partner at a first data rate and at a first transmit power level. The data rate and/or transmit power level is adjusted to an adjusted second data rate and/or second transmit power level based on feedback representing alien crosstalk effects to neighboring Ethernet links caused by the transmitting. A normal data transfer mode of operation is initialized utilizing the adjusted second data rate and/or transmit power level.

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San Jose, CA, United States of America

KongHoei Susanto Lim