Abstract
Full-duplex (FD) radios can transmit and receive packets simultaneously in the same frequency band. Although this potentially doubles the spectral efficiency, it also causes inter-node interference, which was not an issue for half-duplex (HD) radios and can significantly reduce FD radio throughput. This paper proposes a hybrid transmission switching algorithm to reduce performance degradation due to inter-node interference. In contrast to previous studies that only considered channel capacity, we determine the transmission mode by considering the modulation and coding scheme (MCS). The access point compares the required transmission time for HD, FD, and hybrid mode and selects the mode with the best network throughput. We also designed an analytical model to evaluate network throughput for the proposed algorithm. In particular, we consider FD pair probability, which has not been addressed previously. Analytical and simulation results verify that the proposed algorithm improves network performance.
Highlights
Full-duplex (FD) radios can improve spectral efficiency by simultaneously transmitting and receiving packets in the same frequency band
The asymmetric FD pair transmission signal from the UL node interferes with the DL node, reducing DL channel capacity, and the access point (AP) transmits a packet to the lower modulation and coding scheme (MCS) level
FD pair probability with MCS level m is the probability that the DL node is located in the corresponding MCS area, which can be computed as the ratio of the MCS region to AP coverage
Summary
Full-duplex (FD) radios can improve spectral efficiency by simultaneously transmitting and receiving packets in the same frequency band. Several FD medium access control (MAC) protocols to support an asymmetric FD pair have been proposed [6,7,8] They collect the SIRinformation to prevent transmission failure due to inter-node interference and establish the FD pair based on this information. The AP schedules packet transmission based on this information and collects hidden node and buffer state information for each node to establish FD pairs. This paper proposes a hybrid transmission switching algorithm that selects the transmission mode considering the wireless channel environment. Most conventional studies selected the transmission mode based on channel capacity to maximize the instantaneous data rate This is an appropriate method in terms of link level, but not in terms of network level.
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call