ISO 13400-3:2016 pdf free download.Road vehicles Diagnostic communication over Internet Protocol (DoIP) Part 3:Wired vehicle interface based on
IEEE 802.3
Véhicules routiers — communication de diagnostic au travers dii protocole internet (DoIP) — Partie 3: lnterftice dii véhicule câblé stir Ia base de I’IEEE8O2.3.
7 Ethernet physical and data link layer requirements
7.1 General information
Ethernet is a collection of several standards for different tranSmiSSion technologies and speeds contained in IEEE 802.3 and is a frame-based networking technology for wired local area networks. Frames are defined as the foi’mat of data iackets on the wire. The Internet Protocol (lPv4) theoretically allows for a maximum IP packet length of 64 Khytes. This size is limited by the Ethernet specification, which defines a 16-bit-length field and requires a minimum packet length of64 bytes, as well as allowing for a maximum payload length of 1 500 bytes. Consequently, IP packets can have a maximum length of only 1 500 bytes on Ethernet. Howevei IP allows for fragmentation of IP packets over multiple Ethernet frames to work around this limitation. The rules for fragmentation of IP packets differ between IPv6 and lPv4 and are not specified in this document.
The Ethernet connection of a vehicle works with four transmission lines in accordance with IEEE 802.3
100BASE-TX, as well as using an additional activation line. 1’ Ethernet controller in the L)olP Edge
Node can he switched on and oft via the activation line when the test equipment is connected to, or
disconnected from, the vehicle.
There are two types of Ethernet patch cables available:
— one-to-one (1:1) connection, which is usually used to connect an end-node (e.g. a computer) with a network hub or switch. In this case, the pins of each RJ45 connector of the patch cable or the cable to the vehicle connector are directly connected to each other (e.g. Rx+ on the source port is connected to Rx+ on the destination port).
— cross-linked connection, which is usually used to connect two end nodes directly with each other (e.g. computer to computer). In this case, the Tx pins on the source port of the patch cable are connected to the Rx pins on the destination port and vice versa.
Depending on the Auto-MD!(X) capabilities of the [thernet implementation, it is possible that cross— linked connections or 1:1 connections can be used interchangeably. This depends on the Auto-MDI(X) capabilities of the PFIY. The Auto-MDI(X) feature was developed to allow for plug and play use of both types of patch cable.
7.2 Ethernet physical layer requirements
This suhclause specifies the requirements br implementation of the physical layer of Ethernet by the DoIP Edge Node, including stub length in the vehicle and maximum cable length between test equipment and the DoIP Edge Node PHY so as to allow for guaranteed operation even in noisy environments.
jDoEth-OO11 The DoIP Edge Node shall support the IOOI3ASE-TX (100 Mhit/s Ethernet) standard as specified in IEEE 802.3.
[DoEth-0021 The DoIP Edge Node shall support the 1OBASE-T (10 Mbit/s Ethernet) standard as speciIIC(l in IEEE 802.3.ISO 13400-3:2016 pdf free download.
Tags: Road vehicles
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