DocumentCode :
60134
Title :
Full duplex techniques for 5G networks: self-interference cancellation, protocol design, and relay selection
Author :
Zhongshan Zhang ; Xiaomeng Chai ; Keping Long ; Vasilakos, Athanasios V. ; Hanzo, Lajos
Author_Institution :
Sch. of Comput. & Commun. Eng., Univ. of Sci. & Technol. Beijing (USTB), Beijing, China
Volume :
53
Issue :
5
fYear :
2015
fDate :
May-15
Firstpage :
128
Lastpage :
137
Abstract :
The wireless research community aspires to conceive full duplex operation by supporting concurrent transmission and reception in a single time/frequency channel for the sake of improving the attainable spectral efficiency by a factor of two as compared to the family of conventional half duplex wireless systems. The main challenge encountered in implementing FD wireless devices is that of finding techniques for mitigating the performance degradation imposed by self-interference. In this article, we investigate the potential FD techniques, including passive suppression, active analog cancellation, and active digital cancellation, and highlight their pros and cons. Furthermore, the troubles of FD medium access control protocol design are discussed for addressing the problems such as the resultant end-to-end delay and network congestion. Additionally, an opportunistic decode-and-forward- based relay selection scheme is analyzed in underlay cognitive networks communicating over independent and identically distributed Rayleigh and Nakagami-m fading channels in the context of FD relaying. We demonstrate that the outage probability of multi-relay cooperative communication links can be substantially reduced. Finally, we discuss the challenges imposed by the aforementioned techniques and a range of critical issues associated with practical FD implementations. It is shown that numerous open challenges, such as efficient SI suppression, high-performance FD MAC-layer protocol design, low power consumption, and hybrid FD/HD designs, have to be tackled before successfully implementing FD-based systems.
Keywords :
5G mobile communication; Nakagami channels; Rayleigh channels; access protocols; cognitive radio; cooperative communication; decode and forward communication; interference suppression; probability; relay networks (telecommunication); telecommunication network reliability; 5G networks; FD MAC-layer protocol design; FD medium access control protocol design; FD wireless devices; Nakagami-m fading channels; Rayleigh fading channels; active analog cancellation; active digital cancellation; cognitive networks; decode-and-forward- based relay selection scheme; end-to-end delay; frequency channel; full duplex techniques; half duplex wireless systems; multirelay cooperative communication links; network congestion; outage probability; self-interference cancellation; Full duplex communication; MIMO; Receiving antennas; Relays; Throughput; Transmitting antennas; Wireless communication;
fLanguage :
English
Journal_Title :
Communications Magazine, IEEE
Publisher :
ieee
ISSN :
0163-6804
Type :
jour
DOI :
10.1109/MCOM.2015.7105651
Filename :
7105651
Link To Document :
بازگشت