Re: [Discuss-gnuradio] Half-Duplex Relay

[Marcus Müller]

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Hi David,

this is not an easy question by itself -- what you're describing is
the implementation of slotted medium access. This implies
synchronization and some considerations regarding arbitration etc.

There have been several attempts at MAC with GNU Radio, with differing
results.
What kind of MAC you actually want depends on a multitude of factors
- -- a priori knowledge of involved transceivers, knowledge of geometry,
acceptable interference power, acceptable length of preamble,
acceptable latencies and so on.

As soon as all your transceivers know when to start and stop
transmitting/listening, you can use the USRPs' timed_commands to time
your frames. Please refer to the GNU Radio doxygen -> UHD source/sinks
- -> set_command_time.

Greetings,
Marcus

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