ECE 305 Presentation: 4G/5G Power Control and Link Adaptation Analysis

This presentation provides a comprehensive overview of power control and link adaptation techniques in both 4G and 5G wireless networks. It begins with an introduction to 4G and 5G technologies, followed by a detailed exploration of power control mechanisms, including open-loop, closed-loop, adaptive, and interference-based methods. The presentation examines Power Control in 4G and 5G networks, specifically focusing on PUSCH power control. It further analyzes link adaptation strategies in both technologies, including UL, DL, and frequency domain link adaptation. A comparative analysis highlights the key differences and advancements in power control and link adaptation between 4G and 5G, culminating in a conclusion summarizing the key takeaways and referencing relevant academic sources. The presentation includes figures and equations to illustrate key concepts such as interference measurement based power control and adaptive power control. This document is designed to assist students in understanding the complex dynamics of wireless communication systems.

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Supervisor A/Prof Sandy K.Sandrasegaran
Presentation Outline
• Introduction
• What is 4G and 5G
• Power control of 4G
• Power control of 5G
• Comparison of 4G and 5G power control
• Link adaptation of 4G
• Link adaptation of 5G
• Comparison of 4G and 5G Link adaptation
• Conclusion

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Supervisor A/Prof Sandy K.Sandrasegaran
4G Technology
What is 4G Wireless Technology ?

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Supervisor A/Prof Sandy K.Sandrasegaran
5G Technology
What is 5G Wireless Technology ?

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Supervisor A/Prof Sandy K.Sandrasegaran
Power Control

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Supervisor A/Prof Sandy K.Sandrasegaran
Power Control in wireless Network
• PUSCH Power Control (Open-loop power control +
Closed-loop power control)
• Open- Loop power control
• Close-Loop power control
• Adaptive power control
• Distributed power control
• Transmit Power control
• Opportunistic power control
• Dynamic-SIR tracking power control

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Power control in wireless Network
• PUSCH Power control
PUSCH Power control in 4G
PUSCH Power control in 5G

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Supervisor A/Prof Sandy K.Sandrasegaran
Power Control in 4G Network
• Interference measurement based power control
Ptf=min(Ptf,max,γtarget+ PI (βm,βf)+Pn−Gf)dBm
Where,
Gf=path-gain between HeNB and femto UE
PI (βm,βf) = total downlink interference power
estimated by femto UE (dbm)
Ptf,max = maximum transmit power of HeNB (dbm)
Pn = noise power (dbm).

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Supervisor A/Prof Sandy K.Sandrasegaran
Power Control in 4G Network
• Performance with Power Control
Fig. CDF of downlink SINR of MUEs with HeNB power control

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Power Control in 4G Network
• Adaptive Power Control
Pc ≤ Pmax, subchannel
∑c=0C−1Pc≤Pmax,total
Where, Pc= Per subchannel,

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Power Control in 4G Network
• Closed Loop Power Control
Fig. Closed Loop control view of the OFDMA DL resource scheduling tasks

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Power Control in 5G Network
• Power Control Options Based on LTE Mechanisms
* Open-Loop Power control
* Close-Loop Power control
PUE=P0−αG+ΔTF+f(ΔTPC)+10log10M

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Power Control in 5G Network
• Open-Loop Power control
Fig. Open-loop power control

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Power Control in 5G Network
• Closed-Loop Power Control
Fig. Closed-loop power control

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Link Adaptation
• What is Link Adaptation?

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Link Adaptation
• UL Link Adaptation

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Link Adaptation
• DL Link Adaptation

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Link Adaptation
• Self configured Link Adaptation

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Link Adaptation
• Frequency domain Link Adaptation
• Basic Link Adaptation
m = arg maxm{ Rm | Pe ≤ Ptarget }

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Conclusion

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References
• Abdallah Shami, Martin M., C. Assi 2009, Broadband Access Networks, Series Edition, Springer,
Canada.
• Chandhar, Prabhu; Ghosh, Das Suvro S. 2014, ‘Performance Analysis of co-channel deployment of
femtocells with power control in 4G network’, Communications (NCC), pp. 1-6.
• Misfa Susanto, R. Hutabarat, Yettio Y., S. Alam 2017, ’Interference Management using power control
for uplink transmission in femtocell- microcell cellular communication network’, Symposium on
Electrical and Computer Engineering, Vol. 2017, pp. 245-250.
• Rainer S., Fei Qin 2009, ‘Adaptive power control for 4G OFDMA system on frequency swlwctive
fading channels’, 5th International conference,
• Lliev, T.B; Mihaylov, Gr Y; Ivanova, E. P 2017, ‘ Power control schemes for device-to-device
communications in 5G mobile network’, International Convention on Information and
Communication Technology, pp. 416-419.
• Muneta, S; Matsumoto, ‘A new frequency domain link adaptation scheme for broadband OFDM
system’, Gateway to 21st communications village, Vol. 1, No. 1, PP. 253-257.

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• Ekram Hossain, Mehdi Rattri, H. Tabassum 2014,
‘Evaluation Towards 5G Multi-tier Cellular wireless
Network’, An Interference Management Perspective, vol.
01,