# US 10,484,280 B2 · Operation method of a communication node in network

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- Number: US 10,484,280 B2
- Document ID: US10484280B2
- Status: Granted
- Kind: B2
- Application number: 15/493,414
- Filed: 2017-04-21
- Published: 2017-10-26
- Granted: 2019-11-19
- Earliest claimed: 2016-04-21
- Assignees: Hyundai Motor Company
- Applicants: Hyundai Motor Company
- Inventors: Kang Woon Seo; Dong Ok Kim; Jin Hwa Yun
- Web page: https://patentgrep.com/patent/US10484280B2

## CPC

- H04L 45/745: Address table lookup; Address filtering
- H04L 1/00: Arrangements for detecting or preventing errors in the information received {(correcting synchronisation H04L7/00)}
- H04L 45/66: {Layer 2 routing, e.g. in Ethernet based MAN's}
- 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 69/40: for recovering from a failure of a protocol instance or entity, e.g. service redundancy protocols, protocol state redundancy or protocol service redirection (management of faults, events, alarms or notifications in data switching networks H04L41/06)
- H04L 2012/40273: {the transportation system being a vehicle}
- H04L 2012/445: {with switching in a hub, e.g. ETHERNET switch}
- 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 comprises: receiving a first frame from a second communication node; obtaining a destination address of the first frame; and transmitting a second frame including an indicator for indicating an occurrence of an error in the first frame to a communication node corresponding to a source address of the first frame, when a port corresponding to the destination address does not exist in a routing table.

## Claims

### Claim 1

An operation method of a first communication node in an Ethernet-based vehicle network, the operation method comprising:
receiving a first frame from a second communication node;
obtaining a destination address of the first frame without performing an error check operation on the first frame;
transmitting the first frame through a port corresponding to the destination address based on a routing table of the first communication node;
receiving a second frame including a first indicator indicating an occurrence of an error in the first frame from a third communication node receiving the first frame;
transmitting the second frame to a fourth communication node corresponding to a source address of the first frame;
receiving, from the third communication node, a third frame including a second indicator requesting to perform the error check operation;
receiving a fourth frame from the second communication node; and
performing the error check operation on the fourth frame.

### Claim 2 (depends on 1)

The operation method according to claim 1, wherein the destination address is obtained from a medium access control (MAC) header of the first frame.

### Claim 3 (depends on 1)

The operation method according to claim 1, wherein the second frame further includes a third indicator for instructing correction of the error in the first frame.

### Claim 4 (depends on 1)

The operation method according to claim 1, wherein the second frame further includes a fourth indicator for instructing transmission of an error-corrected frame in which the error in the first frame is corrected.

### Claim 5 (depends on 1)

The operation method according to claim 1, further comprising:
obtaining a destination address of the fourth frame when the fourth frame has no error; and
transmitting the fourth frame through a port corresponding to the destination address of the fourth frame based on the routing table.

### Claim 6 (depends on 1)

The operation method according to claim 1, wherein the first communication node is a switch or a bridge, and
wherein the second communication node and the third communication node are end nodes connected to the first communication node.

### Claim 7 (depends on 1)

The operation method according to claim 1, wherein the first communication node supports a cut-through frame routing scheme.

### Claim 8

An operation method of a first communication node in an Ethernet-based vehicle network, the operation method comprising:
receiving, from a second communication node, a first frame on which an error check operation has not been performed in the second communication node;
performing the error check operation on the first frame;
transmitting, to a third communication node corresponding to a source address of the first frame, a second frame including a first indicator indicating an occurrence of an error in the first frame when the first frame has the error; and
transmitting, to the second communication node, a third frame including a second indicator requesting to perform the error check operation.

### Claim 9 (depends on 8)

The operation method according to claim 8, wherein the error in the first frame is identified by performing a cyclic redundancy check on the first frame based on a frame check sequence (FCS) included in an FCS field of the first frame.

### Claim 10 (depends on 8)

The operation method according to claim 8, further comprising:
receiving, from the second communication node, a fourth frame on which the error check operation has been performed in the second communication node.

### Claim 11 (depends on 8)

The operation method according to claim 8, wherein the first communication node is an end node connected to the second communication node, and
wherein the second communication node is a switch or a bridge.