Hi,
I wrote a gnuRadio code that allows me to switch between a Tx_Path and Rx_Path every 10 seconds.
The code is based on the tb.lock() , tb.unlock() functions and the benchmarks provided with gnuradio.
I am able to do the switching fine, however after switching from transmission to reception, the node receives some of the packets that were sent during its own transmission period.
How can I overcome this echo like effect between the TX and RX periods ?
In the main() function I have :
tb.start()
while True:
time.sleep(10)
tb.lock()
tb.conf_transmit()
tb.unlock()
tb.transmit_packets()
tb.lock()
tb.conf_sense()
tb.unlock()
tb.wait()
In the top_block class I have:
def conf_transmit(self):
self.disconnect(self.source, self.rxpath)
self.connect(self.txpath, self.sink)
def conf_sense(self):
self.disconnect(self.txpath, self.sink)
self.connect(self.source, self.rxpath)
def transmit_packets(self):
begin_time = time.time()
pkt_size=1500
pktno = 0
while time.time() - begin_time < 10: # Send for 10 minutes
data = "" - 2) * chr(pktno & 0xff)
payload = struct.pack('!H', pktno & 0xffff) + data
self.send_pkt(payload)
pktno += 1
def send_pkt(self, payload='', eof=False):
### Main Function to Send Packets.
return self.txpath.send_pkt(payload, eof)