Re: [ipwave] PC5 at 5.9GHz - Mode 4 linux drivers?

Alexandre Petrescu <> Tue, 26 January 2021 16:41 UTC

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From: Alexandre Petrescu <>
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Date: Tue, 26 Jan 2021 17:41:49 +0100
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Subject: Re: [ipwave] PC5 at 5.9GHz - Mode 4 linux drivers?
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I was provided in private the 5GAA's list of PC5 capable devices.  It is
a public document whose links clicked ok in OCtober 2020; the document
is at URL

Some of the links no more work.

The document is sorted by: chips, modules, OBUs, RSUs, etc.

The chips are from: Autotalks, Huawei, Qualcomm.

The modules are from: SimCOM, muRata, Quectel, WNC, LG Innotek, ZTE,
Neoway, Unex, Datang, Alps Alpine.

A promising chips to try might be the those who say 'linux' and 'Mode 4'
(a kind of LTE equivalent of 802.11 'ad-hoc' mode).  Because the
software driver in linux would be freely available and the Mode 4 would
be the mode not needing SIM card.

I am not sure though whether or not there are currently linux drivers
available freely for 'Mode 4' implementations?


Le 24/01/2021 à 13:48, Alexandre Petrescu a écrit :
> Hi, IPWAVErs,
> Is there cheaply available hardware to make work PC5 at 5.9GHz?  PC5
> is a part of 5G specs that deal with direct communications between 
> vehicles, presumably without SIM cards and without the involvement of
> a Mobile Network Operator (MNO).
> For my part, I think no, there is no PC5 hardware at 5.9GHz.
> It is very likely, I think, that PC5 hardware (modems, interfaces)
> might use a very different PHY layer than what 802.11-OCB uses.  That
> might be the 'New Radio' (NR) of 5G.  NR is incompatible with 802.11
> PHY layer.
> There are no 5.9GHz bands, no spectrum, allocated neither in USA by
> FCC nor in Europe by the Commission, for 'C-V2X' or for 'PC5' even
> though there might have been a request for comments ('an 'NPRM') at
> FCC in USA in that sense.  That NPRM did not lead to allocating
> 5.9GHz spectrum for C-V2X.  It is one year now since that NPRM
> closed.
> Currently, all 5.9GHz bands are fully allocated to 'DSRC' (or, 802.11
> if you wish, or 'ITS-G5').
> However, I was pointed by a vehicle manufacturer to a router 
> manufacturer (Comsignia, see 
> description that states that one feature is "DSRC and C-V2X (PC5) 
> communication interfaces".  The price of that OBU is not displayed,
> but I suspect it to be in the range of a couple thousand euros, which
> can still be affordable, even though not for a series car whose price
> might be highly affected.
> Also, I was pointed to a recent cheap hardware "AirPrime® EM9190 5G
> NR Sub-6 GHz and mmWave Module" which lists the following bands:
> "Sub-6: n1, n2, n3, n5, n7, n8, n12, n20, n25, n28, n38, n40, n41,
> n48, n66, n71, n77, n78, n79, mmWave: n257, n258, n260, n261".  In
> this list, there are not the bands 'n46' and 'n47', which are the
> bands for 5.9GHz.
> This brings me the question: is there cheap hardware for PC5 at
> 5.9GHz?
> Alex
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