NOTE: The slides contain the visual effects. So for complete information download the presentation and view it in slideshow mode. Description of Non-orthogonal Multiple access in 5G networks Detailed discussion on downlink NOMA scenario and future challenges and trends.

1. NOMA IN 5G
Netowrks
Upcomgin Revolution In
Wireless
Communications
Student CMS ID
Hadi Askari 237753
Anwar Sarwar 212552
Syed Shaharyaar Hussain 218177
Shaheer Bhatti 212291

2. • Non-orthogonal multiple access (NOMA) is an essential
enabling technology for the fifth-generation (5G) wireless
networks to meet the heterogeneous demands on low
latency, high reliability, massive connectivity, improved
fairness, and high throughput.
• The primary reason for adopting NOMA in 5G owes to its
ability of serving multiple users using the same time and
frequency resources.
• In contrast to OMA, non-orthogonal multiple access (NOMA)
allows inter-user interference in the resource allocation of
users and thus multiple users are served using the same
resource block.​
What is NOMA?

3. Fundamentals of NOMA
• There are two main types of NOMA​
• Power Domain NOMA​
• Code Domain NOMA
• P-NOMA assigns a unique power level to a user and multiple users transmit
their signals sharing the same time-frequency-code resources, each using its
allocated power.​
• The level of power for a user is decided based on its channel gain: a user
with higher channel gain is often assigned a lower power level. At the receiving
ends, different users' signals can be separated by exploiting the users’ power-
difference based on SIC.

4. Benefits of NOMA
over OMA
• Superior Spectral Efficiency
• Can support large number of
users​
• Lower Latency for user​
• Maintains user fairness and
quality of service via power
control between users.​

5. Clustering
• Clustering is done in
two steps
• Spatial Clustering
• NOMA Clustering
Spatial
NOMA

6. • If there are m UEs in a spatial cluster
𝛾1 ≥ 𝛾2 ≥··· ≥ 𝛾𝛼 ≫ 𝛾𝛼+1 ≥ 𝛾𝛼+2 ≥··· ≥ 𝛾𝑚
Moderate
Extreme

7. What is SIC?
Any SIC Example?
What’s logical basis for SIC?
What is Data-Rate constraint?
SIC and Data Rate constraint are
different?
SIC and Rate
Constraints
SIC
e

8. What is SIC?
Any SIC Example?
What’s logical basis for SIC?
What is Data-Rate constraint?
SIC and Data Rate constraint are
different?
SIC and Rate
Constraints
SIC

9. What is SIC?
Any SIC Example?
What’s logical basis for SIC?
What is Data-Rate constraint?
SIC and Data Rate constraint are
different?
SIC and Rate
Constraints
SIC

10. What is SIC?
Any SIC Example?
What’s logical basis for SIC?
What is Data-Rate constraint?
SIC and Data Rate constraint are
different?
SIC and Rate
Constraints
Data
Rate

11. What is SIC?
Any SIC Example?
What’s logical basis for SIC?
What is Data-Rate constraint?
SIC and Data Rate constraint are
different?
SIC and Rate
Constraints
Data
Rate

12. Optimization Problems
• Data Rate Maximization
• Power Allocation Optimization
• Energy Consumption Optimization
• Latency Minimization
• Joint Optimization of Power and Bandwidth Allocation

13. Resource Scheduling
• Fundamental step to optimization problems
• Different for each optimization problem
• Power and frequency allocation

14. FUTURE
OPPORTUNITES AND
CHALLENGES
NB-IoT

15. FUTURE
OPPORTUNITES AND
CHALLENGES
Het-
Nets

16. FUTURE
OPPORTUNITES AND
CHALLENGES
Hybrid
Models

17. FUTURE
OPPORTUNITES AND
CHALLENGES
SWIPT
NOMA

18. References

19. THANK YOU!