Re: [Discuss-gnuradio] MAC layer issue

[George Nychis]

Hi Chin-Ya,

MAC implementations are currently a work in progress in GNU Radio, that 
is making headway with the new m-blocks and in-band signaling but not 
done yet.

You do not need a true MAC layer to transmit packets.  The PHY 
transforms bits in to some waveform, right?  There is nothing stopping a 
transmitter and receiver from making sense of these bits.

OFDM sends and receives packets the same way benchmark_tx/rx.py do.  The 
transmitter has some framing bit sequence that the receiver is going to 
look for while it decodes the bits.  If it sees the bit sequence, it 
shoves the next X bits into a structure, which is your packet.  Or, it 
decodes enough to hit a payload field and then determines how many bits 
to decode next as the payload.

Dig in to the code and following code:
./gnuradio-core/src/python/gnuradio/ofdm_packet_utils.py

- George



CHIN-YA HUANG wrote:
> Hey,
>
> Does gnuradio implement any MAC layer thinngs, otherwise how the ofdm send and 
> receive packets?
>
> Thanks
>
>
> Chin-Ya
>
>
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