Re: [ipwave] PC5 at 5.9GHz - modules

Alexandre Petrescu <alexandre.petrescu@gmail.com> Wed, 31 March 2021 16:47 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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In private I am pointed to Wistron as well.  Wistron's web page looks 
attractive and their reputation is high.

It is there 
https://www.wnc.com.tw/index.php?action=pro_cate_third_close&top_id=106&scid=123&tid=145

But it is not a mass produced device.  It is way too expensive.  I 
wouldnt put a 1000EUR device in a cheap car that costs itself 5000EUR. 
It is not proportional.

I wait so it becomes cheaper.

Alex


Le 31/03/2021 à 16:52, Alexandre Petrescu a écrit :
> 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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