WSU Master of Engineering Project: Full-Duplex Communications in 5G

This report examines full-duplex (FD) communications in 5G mobile systems, contrasting it with half-duplex (HD) and simplex modes. It highlights the advantages of FD, such as increased data transmission rates and collision avoidance, while also addressing challenges like self-interference, link reliability degradation, and higher packet loss rates. The report discusses implementation issues, including hybrid HD/FD relaying, optimal relay selection, and power allocation. The conclusion emphasizes the potential of in-band full-duplex (IBFD) to solve 5G challenges, but also acknowledges the increased structural requirements on full-duplex radio handsets. The report is based on research and analysis of existing literature, providing a comprehensive overview of the topic. The report also discusses the advantages of FD, such as increased data transmission rates and collision avoidance, while also addressing challenges like self-interference, link reliability degradation, and higher packet loss rates.

Full-Duplex
Communications
in 5G
Student Name
Institution Affiliation

Introduction
• Full-duplex is the transmission of the data where the
transmissions of data in two ways is simultaneous. A good
example is that of a telephone where there exists a full
duplex with the essence that the devices can communicate
once. This has been contrasted with the half-duplex
devices as it is only one party which can be transmitted at
a time.
• In the concept of the full duplex, data can be transmitted
and thus not appearing on the screen until it the recipient
receive and send it back to the sender.

Advantages of FD Mode
• Ideally when compared to half duplex, the full duplex is almost twice the output
of the single-hop of the links which are wireless such as the 5G in the physical
layer. The secondary is that there exists a collision avoidance (Everett, 2016).
• It is able to solve the problems with hidden terminals. In this concept, in case a
node has started its transmission to the AP which simultaneously starts to
transmit data back to the node, the other existing node will have to listen other
nodes will listen to that transmission and thus avoiding collisions.
• Reduces the congestion with the help of the MAC schedule.
• It usually has an enhanced detection which is of high quality in the environment
of CR.

Challenges Faced by Full-Duplex
Communications
• FD communication is usually constrained by Self-
Interference.
• The link reliability has been degraded.
• It usually suffers from the higher PLR.
• There exists a higher buffer due to the size of the
requirement.

Issues of Implementation of Full-
Duplex communication's
• Hybrid HD/FD relaying
• Selection of the optimal relays
• Allocation of the optimal power

Conclusion
• In conclusion, in-band full duplex (IBFD) idea is a
substantial contender for settling a few difficulties of
people to the future (5G) versatile systems. The
presentation of FD in 5G, in any case, builds the structure
prerequisites on the full-duplex radio handsets. For
business significance and usage close by held gadgets,
these handsets should bolster thick (co-)joining in minimal
effort process innovation and be tunable to help elective
correspondence plans and in reverse similarity.

References
• Chung, M., Sim, M.S., Kim, J., Kim, D.K. and Chae, C.B., 2015. Prototyping real-
time full duplex radios. IEEE Communications Magazine, 53(9), pp.56-63.
• Everett, E., 2016. Full-duplex infrastructure nodes: Achieving long range with
half-duplex mobiles (Doctoral dissertation, Rice University).
• Nikjah, R. and Beaulieu, N.C., 2015, May. Achievable rates and fairness in
rateless coded decode-and-forward half-duplex and full-duplex opportunistic
relaying. In 2015 IEEE International Conference on Communications (pp. 3701-
3707). IEEE.
• Zlatanov, N. and Schober, R., 2015. Buffer-aided half-duplex relaying can
outperform ideal full-duplex relaying. IEEE Communications Letters, 17(3),
pp.479-482.