Enabling ultra-reliable low-latency communications in 5G wireless networks creates challenging design requirements, particularly on the air interface. The stringent latency and reliability targets require enhancements at different layers of the protocol stack. On the other hand, the Parallel Redundancy Protocol, wherein each data packet is duplicated and transmitted concurrently over two independent networks, provides a simple solution for improving reliability and reducing latency in wireless networks. PRP can be realized in cellular networks through the dual connectivity solution. Recently, 3GPP has introduced packet duplication functionality in 5G wireless networks. To this end, this article provides an overview of the packet duplication functionality in 5G in light of recent developments within 3GPP, and also highlights the related technical challenges.
[1]
Luc Martens,et al.
The industrial indoor channel: large-scale and temporal fading at 900, 2400, and 5200 MHz
,
2008,
IEEE Transactions on Wireless Communications.
[2]
IMT Vision – Framework and overall objectives of the future development of IMT for 2020 and beyond M Series Mobile , radiodetermination , amateur and related satellite services
,
2015
.
[3]
Gianluca Cena,et al.
Seamless Link-Level Redundancy to Improve Reliability of Industrial Wi-Fi Networks
,
2016,
IEEE Transactions on Industrial Informatics.
[4]
Thomas Watteyne,et al.
Leapfrog collaboration: Toward determinism and predictability in industrial-IoT applications
,
2017,
2017 IEEE International Conference on Communications (ICC).
[5]
Klaus I. Pedersen,et al.
Dual connectivity for LTE small cell evolution: functionality and performance aspects
,
2016,
IEEE Communications Magazine.
[6]
Gerhard Fettweis,et al.
5G-Enabled Tactile Internet
,
2016,
IEEE Journal on Selected Areas in Communications.