Re: [ipwave] RSU minor textual issue

[François Simon <[e-mail]>]

Three definitions related to RSx in the U.S.:

 

FCC (CFR 90.7 - 2010):

*	RSU: “Roadside unit (RSU). A Roadside Unit is a DSRC transceiver that is mounted along a road or pedestrian passageway. An RSU may also be mounted on a vehicle or is hand carried, but it may only operate when the vehicle or hand-carried unit is stationary. Furthermore, an RSU operating under this part is restricted to the location where it is licensed to operate. However, portable or hand-held RSUs are permitted to operate where they do not interfere with a site-licensed operation. A RSU broadcasts data to OBUs or exchanges data with OBUs in its communications zone. An RSU also provides channel assignments and operating instructions to OBUs in its communications zone, when required”.

 

FHWA ( Vehicle to Infrastructure Deployment Guidance and Products – 2015):

*	RSU: “A connected device that is only allowed to operate from a fixed position (which may in fact be a permanent installation or from temporary equipment brought on-site for a period of time associated with an incident, road construction, or other event). Some RSEs may have connectivity to other nodes or the Internet.”;

 

*	RSE: “Term used to describe the compliment of equipment to be located at the roadside; the RSE will prepare and transmit messages to the vehicles and receive messages from the vehicles for the purpose of supporting the V2I applications. This is intended to include the DSRC radio, traffic signal controller where appropriate, interface to the backhaul communications network necessary to support the applications, and support such functions as data security, encryption, buffering, and message processing. It may also be referred to as the 2015 FHWA Vehicle to Infrastructure Deployment Guidance and Products HANDOUT September 12, 2014 (Rev. 1) Page 7 Term Description roadside ITS station. When speaking of the DSRC radio alone, the correct term is RSU.”.

 

Sincerely,

 

Francois Simon

 

 

 

 

From: its [mailto:[e-mail]] On Behalf Of William Whyte
Sent: Monday, May 29, 2017 7:41 PM
To: Alexandre Petrescu <[e-mail]>
Cc: Russ Housley <[e-mail]>; [e-mail]
Subject: Re: [ipwave] RSU minor textual issue

 

Hi Alex,

 


        RSU: Road Side Unit.  A computer equipped with at least one
        IEEE 802.11 interface operated in OCB mode.  An RSU may be
        connected to the Internet, and may be equipped with additional
        wired or wireless network interfaces running IP.

 

This doesn't cover the difference between an RSU and an OBU :-)

 

Maybe "a computer equipped with at least one IEEE 802.11 interface operated in OCB mode, which is physically located in communications range of vehicles but is not a vehicle device itself".

 

Cheers,

 

William

 

On Tue, May 30, 2017 at 1:56 AM, Alexandre Petrescu <[e-mail] <mailto:[e-mail]> > wrote:



Le 18/05/2017 à 15:33, Russ Housley a écrit :

 

On May 18, 2017, at 5:39 AM, Alexandre Petrescu
<[e-mail] <mailto:[e-mail]>  <mailto:[e-mail] <mailto:[e-mail]> >>
wrote:

OLD:

RSU: Road Side Unit. An IP router equipped with, or connected to, at
least one interface that is 802.11 and that is an interface that
operates in OCB mode.


A comment was made stating that an RSU is not a router, and that an RSU
may be connected to a router via an interface, e.g. Ethernet, to access
the infrastructure if required.

But I think that some Road Side Units are indeed IP routers and they
access the infrastructure and the Internet.  This is an important point
when using the IP protocol - be connected.

I think I keep that text that way at this time.

End issue.


Alex:

Some RSUs will be routers, but others will not.  For example, an RSU
that sends messages to vehicles about foggy conditions does not need to
be a router.  I think the definition should allow both cases.


Russ,

I propose the following new definition.  It allows both cases:

        RSU: Road Side Unit.  A computer equipped with at least one
        IEEE 802.11 interface operated in OCB mode.  An RSU may be
        connected to the Internet, and may be equipped with additional
        wired or wireless network interfaces running IP.


Alex

 


Russ


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