version: PCQ (see desc. in the paper)
===
The time slots changed to be 3 slots. (TX, SLEEP, RX)

REQ:
===

REQ: eliminate the seqno in the data packets. 
		REQ carries a startByte and the following 6 bytes as vectors.
		Send: format.
		Receive: To avoid that REQ marks the unreceived packet as a packet to send, before the OR operation, the unreceived bits in the received REQ should be clear.
3. SLEEP slot is not real
===
just accounting the slot time duration in the logs.

Please note that you should add channel "CoCo" in the run.py file to record the logs.