# US 2023/0412352 A1 · Automotive asymmetric ethernet using frequency-division duplex > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2023/0412352 A1 - Document ID: US20230412352A1 - Status: Published application - Kind: A1 - Application number: 18/460,546 - Filed: 2023-09-03 - Published: 2023-12-21 - Earliest claimed: 2021-12-09 - Assignees: Marvell Asia Pte Ltd - Applicants: Marvell Asia Pte Ltd - Inventors: Xing Wu; Shaoan Dai; Dance Wu; William Chu - Web page: https://patentgrep.com/patent/US20230412352A1 ## CPC - H04L 5/14: Two-way operation using the same type of signal, i.e. duplex - H04B 3/23: using a replica of transmitted signal in the time domain, e.g. echo cancellers - H04L 7/04: Speed or phase control by synchronisation signals {(H04L7/0075 takes precedence)} - H04L 7/0058: {detection of error based on equalizer tap values} - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04B: TRANSMISSION ## Abstract An Ethernet Physical Layer (PHY) device includes a link interface and a transceiver. The link interface is configured to connect to a full-duplex wired Ethernet link. The transceiver is configured to receive first Ethernet signals carrying first data at a first data rate over the Ethernet link in a first direction, the first Ethernet signals occupying a first frequency band, and to transmit second Ethernet signals carrying second data at a second data rate different from the first data rate, over the Ethernet link in a second direction that is opposite the first direction, the second Ethernet signals occupying a second frequency band that is different from the first frequency band. ## Claims ### Claim 1 An Ethernet Physical Layer (PHY) device, comprising: a link interface, configured to connect to a full-duplex wired Ethernet link; and a transceiver, configured to: receive first Ethernet signals carrying first data at a first data rate over the Ethernet link in a first direction, the first Ethernet signals occupying a first frequency band; and transmit second Ethernet signals carrying second data at a second data rate different from the first data rate, over the Ethernet link in a second direction that is opposite the first direction, the second Ethernet signals occupying a second frequency band that is different from the first frequency band. ### Claim 2 (depends on 1) The Ethernet PHY device according to claim 1, wherein the transceiver is configured to receive the first Ethernet signals without canceling an echo of the transmitted second Ethernet signals. ### Claim 3 (depends on 1) The Ethernet PHY device according to claim 1, wherein the second frequency band partly overlaps the first frequency band. ### Claim 4 (depends on 1) The Ethernet PHY device according to claim 1, wherein the transceiver comprises: a first filter tuned to the first frequency band and configured to filter the first Ethernet signals received from the Ethernet link; and a second filter tuned to the second frequency band and configured to filter the second Ethernet signals transmitted to the Ethernet link. ### Claim 5 (depends on 4) The Ethernet PHY device according to claim 4, wherein the first filter is configured to suppress a portion of the first Ethernet signal that is above the first data rate, and wherein the second filter is configured to suppress a portion of the second Ethernet signal that is below the second data rate. ### Claim 6 (depends on 1) The Ethernet PHY device according to claim 1, wherein the transceiver is locally coupled to a sensor in a vehicle, the sensor providing the second data having the second data rate to the transceiver for transmission in the second frequency band, the transceiver being configured to receive the first data, having the first data rate and received in the first frequency band, from a processor or switch in the vehicle over the Ethernet link. ### Claim 7 (depends on 1) The Ethernet PHY device according to claim 1, wherein the transceiver is locally coupled to a processor or switch in a vehicle, the processor or switch providing the second data having the second data rate to the transceiver for transmission in the second frequency band, the transceiver being configured to receive the first data, having the first data rate and received in the first frequency band, from a sensor in the vehicle over the Ethernet link. ### Claim 8 A method for communication, comprising: in an Ethernet Physical Layer (PHY) device connected to a full-duplex wired Ethernet link, receiving first Ethernet signals carrying first data at a first data rate over the Ethernet link in a first direction, the first Ethernet signals occupying a first frequency band; and transmitting second Ethernet signals carrying second data at a second data rate different from the first data rate, over the Ethernet link in a second direction that is opposite the first direction, the second Ethernet signals occupying a second frequency band that is different from the first frequency band. ### Claim 9 (depends on 8) The method according to claim 8, wherein receiving the first Ethernet signals is performed without canceling an echo of the transmitted second Ethernet signals. ### Claim 10 (depends on 8) The method according to claim 8, wherein the second frequency band partly overlaps the first frequency band. ### Claim 11 (depends on 8) The method according to claim 8, further comprising: filtering the first Ethernet signals, received from the Ethernet link, by a first filter tuned to the first frequency band; and filtering the second Ethernet signals, transmitted to the Ethernet link, by a second filter tuned to the second frequency band. ### Claim 12 (depends on 11) The method according to claim 11, wherein filtering the first Ethernet signals comprises suppressing a portion of the first Ethernet signals that is above the first data rate, and wherein filtering the second Ethernet signals comprises suppressing a portion of the second Ethernet signals that is below the second data rate. ### Claim 13 (depends on 8) The method according to claim 8, wherein receiving the first Ethernet signals comprises receiving the first Ethernet signals, having the first data rate and received in the first frequency band, from a processor or switch in a vehicle over the Ethernet link, and wherein transmitting the second Ethernet signals comprises obtaining the second data, having the second data rate, from a sensor in the vehicle, and transmitting the second Ethernet signals carrying the obtained second data, having the second data rate, in the second frequency band. ### Claim 14 (depends on 8) The method according to claim 8, wherein receiving the first Ethernet signals comprises receiving the first Ethernet signals, having the first data rate and received in the first frequency band, from a sensor in a vehicle over the Ethernet link, and wherein transmitting the second Ethernet signals comprises obtaining the second data, having the second data rate, from a processor or switch in the vehicle, and transmitting the second Ethernet signals carrying the obtained second data in the second frequency band.