# US 10,484,235 B2 · Power management method in network and apparatus for the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,484,235 B2 - Document ID: US10484235B2 - Status: Granted - Kind: B2 - Application number: 15/481,926 - Filed: 2017-04-07 - Published: 2017-10-19 - Granted: 2019-11-19 - Earliest claimed: 2016-04-14 - Assignees: Hyundai Motor Company; Kia Motors Corporation; Yura Corporation Co., Ltd. - Applicants: Hyundai Motor Company; Kia Motors Corporation; Yura Corporation Co., Ltd. - Inventors: Woo Sub Kim; Seong Jin Park; Han Sop Kim; Seung Rok Dan - Web page: https://patentgrep.com/patent/US10484235B2 ## CPC - H04L 41/0668: by dynamic selection of recovery network elements, e.g. replacement by the most appropriate element after failure - H04L 12/10: Current supply arrangements - H04L 41/0677: Localisation of faults - H04L 43/0817: by checking functioning - H04L 61/103: across network layers, e.g. resolution of network layer into physical layer addresses or address resolution protocol [ARP] - H04L 61/35: {involving non-standard use of addresses for implementing network functionalities, e.g. coding subscription information within the address or functional addressing, i.e. assigning an address to a function} - H04L 67/12: specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks - H04L 2101/622: Layer-2 addresses, e.g. medium access control [MAC] addresses - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract An operation method of a first communication node includes: measuring a magnitude of a current supplied to a second communication node through a data line in the vehicle network; comparing the measured magnitude of the current with a predetermined threshold value; generating an address resolution protocol (ARP) frame including fault-related information when the second communication node is determined to be in a fault state based on a result of the comparison; and transmitting the ARP frame. ## Claims ### Claim 1 An operation method of a first communication node in a vehicle network, the method comprising: measuring a magnitude of a current supplied to a second communication node through a data line in the vehicle network; comparing the measured magnitude of the current with a predetermined threshold value; generating an address resolution protocol (ARP) frame including fault-related information when the second communication node is determined to be in a fault state based on a result of the comparison; and transmitting the ARP frame. ### Claim 2 (depends on 1) The operation method according to claim 1, wherein the fault-related information includes at least one of: an indicator indicating whether a fault has occurred, a code indicating a type of a fault, and an identifier of the second communication node in the fault state. ### Claim 3 (depends on 2) The operation method according to claim 2, wherein the code indicating the type of the fault is included in an operation field included in an ARP header of the ARP frame. ### Claim 4 (depends on 2) The operation method according to claim 2, wherein the identifier of the second communication node in the fault state is a physical (PHY) layer address or a medium access control (MAC) layer address. ### Claim 5 (depends on 1) The operation method according to claim 1, wherein the magnitude of the current is measured by a switch controlling a power supply included in the first communication node. ### Claim 6 (depends on 1) The operation method according to claim 1, wherein the first communication node is a gateway. ### Claim 7 (depends on 1) The operation method according to claim 1, further comprising: determining the second communication node is in a short state when the measured magnitude of the current is greater than the predetermined threshold value; and determining the second communication node is in an open state when the measured magnitude of the current is less than the predetermined threshold value. ### Claim 8 (depends on 1) The operation method according to claim 1, further comprising: determining the second communication node is in a short state when a current greater than the predetermined threshold value lasts for a predetermined time or longer; and determining the second communication node is in an open state when a current less than the predetermined threshold value lasts for the predetermined time or longer. ### Claim 9 (depends on 1) The operation method according to claim 1, further comprising stopping power supply to the second communication node through the data line when the second communication node is determined to be in the fault state. ### Claim 10 (depends on 1) The operation method according to claim 1, further comprising storing the fault-related information in a database when the second communication node is determined to be in the fault state. ### Claim 11 A first communication node in a vehicle network, the first communication node comprising: at least one switch controlling a power supply; a processor controlling the at least one switch; and a memory storing at least one instruction code executed by the processor, wherein, when the at least one stored instruction code is executed, the processor is caused to: measure a magnitude of a current supplied to a second communication node through a data line in the vehicle network; compare the measured magnitude of the current with a predetermined threshold value; generate an address resolution protocol (ARP) frame including fault-related information when the second communication node is determined to be in a fault state based on a result of the comparison; and transmit the ARP frame. ### Claim 12 (depends on 11) The first communication node according to claim 11, wherein the fault-related information includes at least one of: an indicator indicating whether a fault has occurred, a code indicating a type of a fault, and an identifier of the second communication node in the fault state. ### Claim 13 (depends on 12) The first communication node according to claim 12, wherein the code indicating the type of the fault is included in an operation field included in an ARP header of the ARP frame. ### Claim 14 (depends on 12) The first communication node according to claim 12, wherein the identifier of the second communication node in the fault state is a physical (PHY) layer address or a medium access control (MAC) layer address. ### Claim 15 (depends on 11) The first communication node according to claim 11, wherein the second communication node is determined to be in a short state when the measured magnitude of the current is greater than the predetermined threshold value, and the second communication node is determined to be in an open state when the measured magnitude of the current is less than the predetermined threshold value. ### Claim 16 (depends on 11) The first communication node according to claim 11, wherein the second communication node is determined to be in a short state when a current greater than the predetermined threshold value lasts for a predetermined time or longer, and the second communication node is determined to be in an open state when a current less than the predetermined threshold value lasts for the predetermined time or longer.