Experimental range extension of concurrent cooperative transmission in indoor environments at 2.4GHz

On cooperative transmission range extension in multi-hop wireless ad-hoc and sensor networks: A review

“…We demonstrate concurrent CT (CCT)-based algorithms with a real testbed using 20 software-defined radios (SDRs) in [57,6,[82][83][84], because off-the-shelf radios do not support the physical-layer signal combining capability, which is required in CCT. One node of the testbed, shown in Fig.…”

“…In [84], we demonstrate the two-hop CT range extension in indoor environments. In this section, we present some new experimental results, not covered in our previous work.…”

“…As in [84], the purpose of this study is to compare the maximum range reached in two hops by CCT and the conventional non-CT. For non-CT, the two hops consist of two consecutive single-input-single-output (SISO) links using a single relay. On the other hand, in CCT, multiple relays from two to four are used in the second-hop transmission creating a virtual multiple-input-single-output (VMISO) link, while the first-hop transmission from the source to each relay is a SISO link without cooperative reception.…”

“…We measure the average packet error rate (APER) at the second-hop destination, when the source transmits 1000 packets. The APER is the averaged over 120 iterations with different multi-path channel realizations as described in [84].…”

EECDC-MAC: An energy efficient cooperative duty cycle MAC protocol

“…Upon receiving the CFC packet, the receiving node B will go to sleep. After a SIFS, CT by Node C and the selected cooperators will be concurrently performed [4]. After receiving the DATA packet, Node A will respond with ACK to Node B and then B forwards it to C and D. In the current cycle, Node B has to wake up again before the arrival of the ACK packet since ACK for CT will be sent back to Node C via Node B.…”