Dear 6Lo WG,
I recently submitted a draft for IPv6 over Controller Area Network and
would like to call for adoption by the 6Lo WG.
The title of the document is draft-wachter-6lo-can-00 [1].
Controller Area Network (CAN) is a widely used field bus initially
designed for the automotive domain. It has a payload length of eight
bytes for classic CAN and 64 bytes for CAN-FD. CAN only describes the
data-link-layer, but various protocols already exist on top. The
submitted draft introduces IPv6 over CAN (6LoCAN), a 6lo-adaption-layer
to send IPv6 packets over the constrained CAN-bus. 6LoCAN uses a subset
of the already widely used ISO-TP standard for fragmentation and
reassembly to meet the 1280 minimum MTU requirement of IPv6. It also
uses the IPHC (RFC6282) to reduce the protocol overhead of IPv6.
A broad range of devices, from small and cheap MCUs to big application
processors, already have CAN controllers onboard. With 6LoCAN, it is
possible to create networks of resource-constrained MCUs that can
leverage the broad range of protocols and security mechanisms built on
top of the IP.
Additionally, multiple 6LoCAN networks can be connected together or even
to the internet by utilizing the routing capabilities of IP networks.
A reference implementation of 6LoCAN already exists in the mainline
Zephyrproject RTOS [2] tree. It includes a sample server-client
application. The source for it is located under [3] and can be used on
any boards supporting CAN.
I am looking forward to your comments on the draft.
Kind regards,
Alexander
[1] https://datatracker.ietf.org/doc/draft-wachter-6lo-can/
[2] https://www.zephyrproject.org/
[3]
https://github.com/zephyrproject-rtos/zephyr/tree/master/samples/net/sockets/echo_client
--
Alexander Wachter, BSc
Student of Information and Computer Engineering
Graz University of Technology
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