# US 2013/0159489 A1 · System and method for managing ethernet communication network for use in vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0159489 A1 - Document ID: US20130159489A1 - Status: Published application - Kind: A1 - Application number: 13/567,371 - Filed: 2012-08-06 - Published: 2013-06-20 - Earliest claimed: 2011-12-15 - Assignees: Hyundai Motor Company - Inventors: Sang Ho CHA; Dong Ok KIM; Jin Hwa YUN; Yong Ho NOH - Web page: https://patentgrep.com/patent/US20130159489A1 ## CPC - H04L 61/5038: for local use, e.g. in LAN or USB networks, or in a controller area network [CAN] - H04L 12/40039: {Details regarding the setting of the power status of a node according to activity on the bus} - H04L 41/0809: {Plug-and-play configuration} - H04L 61/5014: using dynamic host configuration protocol [DHCP] or bootstrap protocol [BOOTP] - H04L 65/1045: Proxies, e.g. for session initiation protocol [SIP] - H04L 65/1069: Session establishment or de-establishment - H04L 65/611: for multicast or broadcast (systems for broadcast or conference H04L12/18; arrangements for broadcast or distribution combined with broadcast H04H20/00; arrangements for broadcast applications with a direct linkage to broadcast information or to broadcast space-time H04H60/00; selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS], H04W4/06) - H04L 2012/40273: {the transportation system being a vehicle} - Y02D 30/50: in wire-line communication networks, e.g. low power modes or reduced link rate - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE ## Abstract A system and method for managing a vehicle Ethernet communication network are disclosed. More specifically, each unit in a vehicle Ethernet communication network is configured to initially enter a power-on (PowerOn) mode when is applied to each unit of the vehicle to initialize operational programs. Once powered on, each unit enters a normal mode in which a node for each unit participates in a network to request the network. Subsequently, each unit enters a sleep indication (SleepInd) mode where other nodes are not requested even though the network has already been requested by the other nodes. A communication mode is then terminated at each unit and each unit enters a wait bus sleep (WaitBusSleep) mode in which all nodes connected to the network are no longer in communication and are waiting to switch to sleep mode. Finally, each unit is powered off to prevent communication between units in the network. ## Claims ### Claim 1 A method for managing a vehicle Ethernet communication network in which a node for each internal unit of the vehicle performs Ethernet communication, the method comprising: entering, by each unit in the network, a power-on (PowerOn) mode wherein power is provided to each unit in the network of the vehicle to initialize each operation in each unit; entering, by each unit in the network, a normal mode wherein a node in each unit participates in the network and the network is then requested; entering, by each unit in the network, a sleep indication (SleepInd) mode wherein other nodes are not requested even when the network is requested by the other nodes; terminating, by each unit in the network, a communication mode; entering, by each unit in the network, a wait bus sleep (WaitBusSleep) mode wherein all nodes connected to the network are not in communication and are awaiting; and entering, by each unit in the network, a power-off mode in which each unit is powered off thereby preventing each unit from communicating with another unit in the network. ### Claim 2 (depends on 1) The method according to claim 1, wherein basic operations of the sleep indication (SleepInd) mode are identical to those of the normal mode, but the sleep indication (SleepInd) mode does not awaken the network any longer. ### Claim 3 (depends on 1) The method according to claim 1, further comprising: entering the sleep indication (SleepInd) mode when a communication message occurs in the wait bus sleep (WaitBusSleep) mode. ### Claim 4 (depends on 1) The method according to claim 1, further comprising: entering the sleep mode once the wait bus sleep (WaitBusSleep) is maintained for a predetermined time. ### Claim 5 (depends on 1) The method according to claim 1, further comprising: in the sleep mode or the sleep indication (SleepInd) mode, once a corresponding node receives a predetermined wakeup signal, entering the normal mode. ### Claim 6 (depends on 5) The method according to claim 5, wherein the predetermined wakeup signal is implemented as a local wakeup signal caused by self-operations of each unit and a remote wakeup signal caused by Ethernet communication. ### Claim 7 (depends on 1) The method according to claim 1, further comprising: in the power-on (PowerOn) mode or the normal mode, performing address allocation for Ethernet communication of each node constructing the network. ### Claim 8 (depends on 7) The method according to claim 7, further comprising: when the address allocation is completed, entering the normal mode. ### Claim 9 (depends on 1) The method according to claim 1, wherein the power-off (PowerOff) mode is activated when a battery is detached from the vehicle or when all units are powered off. ### Claim 10 (depends on 7) The method according to claim 7, further comprising: when the battery is attached to the vehicle, sequentially entering the power-on (PowerOn) mode, the normal mode, the sleep indication (SleepInd) mode, and the sleep mode, thereby completing network initial setup. ### Claim 11 (depends on 1) The method according to claim 1, further comprising: when all units contained in the network enter the sleep indication (SleepInd) mode, performing the wait bus sleep (WaitBusSleep) mode. ### Claim 12 A system for managing a vehicle network wherein a node for each unit contained in the vehicle performs Ethernet communication based on at least one unit which includes a dynamic host configuration protocol (DHCP) server, the system comprising: each unit of the network including: a first operation program storage unit configured to store an operation program including an Ethernet communication protocol, a first controller configured to provide overall control of a device based on a program stored in the first operation program storage unit, a first Ethernet communication unit configured to communicate with at least one other unit or the DHCP server, and a first self-address information storage unit configured to store self-address information allocated through communication with the DHCP server, wherein the at least one unit including the DHCP server includes: a second operation program storage unit configured to store an operation program including an Ethernet communication protocol, a second controller configured to provide overall control of a device based on a program stored in the second operation program storage unit, a second Ethernet communication unit configured to communicate with at least one other unit in the network, a second self-address information storage unit configured to store self-address information, a third storage unit configured to store address information of each unit so as to store address information of each unit constructing the network, and a mode storage unit configured to store an operation mode indicating an operation state of the network as data.