Re: [ipwave] PC5 at 5.9GHz - modules

Alexandre Petrescu <alexandre.petrescu@gmail.com> Wed, 31 March 2021 14:52 UTC

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From: Alexandre Petrescu <alexandre.petrescu@gmail.com>
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Subject: Re: [ipwave] PC5 at 5.9GHz - modules
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I am told in private about success reports on linux with:
- USRP B210 SDR Kit - Dual Channel Transceiver (70 MHz - 6GHz) - Ettus
   Research - ~1000Eur.
- CohdaWireless MK6 evaluation kits.

For my part, I am looking for cheap miniPCIe cards for C-V2X at 5.9GHz 
for linux.

Maybe these will come up a little bit later.

Alex


Le 31/03/2021 à 15:17, Alexandre Petrescu a écrit :
> For information,
> 
> Me and a colleague have looked independently at the pdf of devices for
> C-V2X.
> 
> My goal is to identify the best possible C-V2X miniPCIe card that is
> supported in linux.
> 
> By reputation, maybe the Unex is the most likely to offer one such card.
>   A few of us already worked with Unex cards in the past, but for ITS-G5.
>   But Unex card for C-V2X at 5.9GHz is not yet available to acquire
> easily (like e.g. buying on Amazon or alibaba).
> 
> I wait for easy availability because of the risk of what might happen at 
> customs.  The regulation of C-V2X spectrum in Europe and in the country 
> where I live is far from straightforward: it is not clear in Europe 
> whether or not C-V2X technology is allowed at 5.9GHz.  BEcause of that 
> uncertainty the customs prices can skyrocket easily (add up to double to 
> the original price).
> 
> We wait.
> 
> Alex
> 
> 
> 
> Le 26/01/2021 à 17:41, Alexandre Petrescu a écrit :
>> 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 
>> https://5gaa.org/wp-content/uploads/2020/11/5GAA_List-of-C-V2X-Devices.pdf 
>>
>>
>>  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?
>>
>> Alex
>>
>> 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 https://www.commsignia.com/hardware/)
>>>  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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