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Performance analysis of NOMA-based mobile edge computing with imperfect CSI
- Source :
- EURASIP Journal on Wireless Communications and Networking, Vol 2020, Iss 1, Pp 1-16 (2020)
- Publication Year :
- 2020
- Publisher :
- Springer Science and Business Media LLC, 2020.
-
Abstract
- In this paper, a non-orthogonal multiple access (NOMA)-based mobile edge computing (MEC) system is proposed, where paired users (the mth user and the nth user) offload tasks to the MEC server under imperfect channel state information (ipCSI) condition. To evaluate the effect on performance under ipCSI condition in NOMA-MEC system, this study derives new exact and asymptotic expressions of the offloading outage probability for two users under ipCSI and perfect channel state information (pCSI) conditions. On the basis of the theoretical derivation, the diversity orders of the nth user under ipCSI and pCSI conditions are zero and n, respectively, while those for the distant user are all zeros. In addition, we also investigate the system throughput and energy efficiency of NOMA-MEC in delay-limited transmission. Numerical results show that (1) the offloading outage behaviors of NOMA-MEC are better than those of time division multiple address (TDMA), (2) the offloading outage performance of paired users under ipCSI is worse than that under pCSI, and (3) the NOMA-MEC system achieves higher throughput and energy efficiency than does the TDMA-MEC system.
- Subjects :
- Computer Networks and Communications
Computer science
Time division multiple access
lcsh:TK7800-8360
Throughput
02 engineering and technology
lcsh:Telecommunication
Noma
0203 mechanical engineering
lcsh:TK5101-6720
0202 electrical engineering, electronic engineering, information engineering
medicine
Offloading outage probability
Mobile edge computing
business.industry
lcsh:Electronics
020302 automobile design & engineering
020206 networking & telecommunications
Division (mathematics)
medicine.disease
Computer Science Applications
Transmission (telecommunications)
Channel state information
Non-orthogonal multiple access
Signal Processing
Imperfect channel state information
business
Efficient energy use
Computer network
Subjects
Details
- ISSN :
- 16871499
- Volume :
- 2020
- Database :
- OpenAIRE
- Journal :
- EURASIP Journal on Wireless Communications and Networking
- Accession number :
- edsair.doi.dedup.....2b7bde61b641e2e547edf32d334aefae