Re: [Discuss-gnuradio] adapt the MAC of the gr-ieee802.11

[Bastian Bloessl]

Hi,

On 10/26/18 9:18 AM, Steve Joumessi Demeffo wrote:
> 
> I want to build a LiFi test bench by implementing the old PHY 802.11 IR
> layer specification (PPM-4 modulation, FEC, header) and a CSMA MAC layer
> without Ack and then split the MAC between SDR and FPGA to improve
> performance.
> I would like to start from the project gr-ieee802.11 for the
> construction of the MAC, but it is built for the PHY OFDM 802.11 a / b
> standard.
> I want to know which blocks I have to modify to adapt the MAC to my
> project. I am also looking for source code documentation. Thanks for
> your help.

I'm afraid gr-ieee802-11 is of not much help here. It is mainly the PHY.
The MAC block just adds the required headers but doesn't implement CSMA.
I also worked on a simplified channel access (broadcast only), but that
was for the FPGA of the N210.

Best,
Bastian


> Best regards
> 
> Steve JOUMESSI DEMEFFO
> 
>  
> 
> Le 2018-10-25 18:00, address@hidden a écrit :
> 
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>> Today's Topics:
>>
>>    1. Re: Simulation to compute BER of a Modulator/Demodulator
>>       Encoding/Decoding system (Cinaed Simson)
>>    2. adapt the MAC of the gr-ieee802.11 (Steve Joumessi Demeffo)
>>    3. Re: adapt the MAC of the gr-ieee802.11 (Bastian Bloessl)
>>
>>
>> ----------------------------------------------------------------------
>>
>> Message: 1
>> Date: Wed, 24 Oct 2018 15:20:36 -0700
>> From: Cinaed Simson <address@hidden <mailto:address@hidden>>
>> To: address@hidden <mailto:address@hidden>
>> Subject: Re: [Discuss-gnuradio] Simulation to compute BER of a
>>      Modulator/Demodulator Encoding/Decoding system
>> Message-ID: <address@hidden <mailto:address@hidden>>
>> Content-Type: text/plain; charset=utf-8
>>
>> On 10/23/2018 08:28 PM, Christian BusquielSanz wrote:
>> > I am having this output with my Reed Solomon test:
>> > 
>> > Generating: '/home/cbusquielsanz/GNURadio/work/ReedSolomon_Test_001.py'
>> > 
>> > Generating: '/home/cbusquielsanz/GNURadio/work/ReedSolomon_Test_001.py'
>> > 
>> > Executing: /usr/bin/python -u
>> > /home/cbusquielsanz/GNURadio/work/ReedSolomon_Test_001.py
>> > 
>> > Traceback (most recent call last):
>> >   File "/home/cbusquielsanz/GNURadio/work/ReedSolomon_Test_001.py",
>> > line 283, in <module>
>> >     main()
>> >   File "/home/cbusquielsanz/GNURadio/work/ReedSolomon_Test_001.py",
>> > line 271, in main
>> >     tb = top_block_cls()
>> >   File "/home/cbusquielsanz/GNURadio/work/ReedSolomon_Test_001.py",
>> > line 87, in __init__
>> >     self.satellites_encode_rs_0 = satellites.encode_rs(0)
>> > AttributeError: 'module' object has no attribute 'encode_rs'
>> > 
>> >>>> Done (return code 1)
>> > 
>> > 
>> > 
>> > 
>> > It seems that there is a problem with GR Satellites "CCSDS Reed-Solomon 
>> > Encoder"
>> > 
>> > I am attaching the flowgraph, the GRC file
>> > 
>> > I have not found information about this issue
>> > 
>> > What am I doing wrong?
>> > Thank you
>>
>> It runs without error for me under version 3.7.13.4.
>>
>> That is, it generates 3 windows each with a single straight line of
>> amplitude 0.
>>
>> -- Cinaed
>>
>> > 
>> > 
>> > 
>> > Christian S?ngir     Busquiel Sanz
>> > 
>> > 
>> > 
>> > _______________________________________________
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>> > address@hidden <mailto:address@hidden>
>> > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>> > 
>>
>>
>>
>>
>> ------------------------------
>>
>> Message: 2
>> Date: Thu, 25 Oct 2018 10:30:07 +0200
>> From: Steve Joumessi Demeffo <address@hidden <mailto:address@hidden>>
>> To: discuss-gnuradio <address@hidden <mailto:address@hidden>>
>> Subject: [Discuss-gnuradio] adapt the MAC of the gr-ieee802.11
>> Message-ID: <address@hidden <mailto:address@hidden>>
>> Content-Type: text/plain; charset="utf-8"
>>
>> I want to adapt the MAC of the gr-ieee802.11 project to a PPM physical
>> layer.
>> I want to know which blocks I need to adapt to my
>> project.
>>
>> Thanks for your help
>>
>> Best regards 
>> Steve JOUMESSI
>>
>>  
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>> ------------------------------
>>
>> Message: 3
>> Date: Thu, 25 Oct 2018 16:50:45 +0100
>> From: Bastian Bloessl <address@hidden <mailto:address@hidden>>
>> To: Steve Joumessi Demeffo <address@hidden <mailto:address@hidden>>,
>>      discuss-gnuradio <address@hidden <mailto:address@hidden>>
>> Subject: Re: [Discuss-gnuradio] adapt the MAC of the gr-ieee802.11
>> Message-ID: <address@hidden <mailto:address@hidden>>
>> Content-Type: text/plain; charset=utf-8
>>
>> Hi Steve,
>>
>> On 10/25/18 9:30 AM, Steve Joumessi Demeffo wrote:
>> > I want to adapt the MAC of the gr-ieee802.11 project to a PPM physical
>> > layer. I want to know which blocks I need to adapt to my project.
>>
>> Probably `lib/mac.cc`, but that's hard to tell with this little
>> information. It would be helpful if you could be a bit more specific.
>>
>> Best,
>> Bastian
>>
>>
>>
>>
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-- 
Dr. Bastian Bloessl
Research Fellow @ CONNECT Center
Trinity College Dublin

GitHub/Twitter: @bastibl
https://www.bastibl.net/