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Enhancing 5G Performance: Reducing Service Time and Research Directions for 6G Standards

Laura Landon, Vipindev Adat Vasudevan, Jaeweon Kim, Junmo Sung, Jeffery Tony Masters, Muriel Médard

TL;DR

Experimental results show that network coding reduces service times by up to 7% in low SNR regimes, with greater reduction across all SNR as the number of packets in flight increases, suggesting that future 6G standards should consider increasing the number of HARQ processes for better performance.

Abstract

This paper presents several methods for minimizing packet service time in networks using 5G and beyond. We propose leveraging network coding alongside Hybrid Automatic Repeat reQuest (HARQ) to reduce service time as well as optimizing Modulation and Coding Scheme (MCS) selection based on the service time. Our network coding approach includes a method to increase the number of packets in flight, adhering to the current standard of the 16 HARQ process limit, demonstrating that these strategies can enhance throughput and reduce latency. Experimental results show that network coding reduces service times by up to 7% in low SNR regimes, with greater reduction across all SNR as the number of packets in flight increases, suggesting that future 6G standards should consider increasing the number of HARQ processes for better performance.

Enhancing 5G Performance: Reducing Service Time and Research Directions for 6G Standards

TL;DR

Experimental results show that network coding reduces service times by up to 7% in low SNR regimes, with greater reduction across all SNR as the number of packets in flight increases, suggesting that future 6G standards should consider increasing the number of HARQ processes for better performance.

Abstract

This paper presents several methods for minimizing packet service time in networks using 5G and beyond. We propose leveraging network coding alongside Hybrid Automatic Repeat reQuest (HARQ) to reduce service time as well as optimizing Modulation and Coding Scheme (MCS) selection based on the service time. Our network coding approach includes a method to increase the number of packets in flight, adhering to the current standard of the 16 HARQ process limit, demonstrating that these strategies can enhance throughput and reduce latency. Experimental results show that network coding reduces service times by up to 7% in low SNR regimes, with greater reduction across all SNR as the number of packets in flight increases, suggesting that future 6G standards should consider increasing the number of HARQ processes for better performance.
Paper Structure (15 sections, 16 equations, 9 figures)

This paper contains 15 sections, 16 equations, 9 figures.

Table of Contents

  1. Introduction
  2. Related Work
  3. Methodology
  4. ARQ and HARQ
  5. Network Coding
  6. Methods to Minimize Service Time
  7. MCS Optimization
  8. Increasing Packets in Flight
  9. Results and Discussion
  10. Optimizing MCS for service time: HARQ
  11. Optimizing MCS for service time: Network coding reduces delay compared to HARQ
  12. Limitation of 16 HARQ Processes
  13. Increasing Packets in Flight via Network Coding
  14. Improved Service Level Agreement
  15. Conclusion

Figures (9)

  • Figure 1: Service times for two packets.
  • Figure 2: Limitation on number of packets due to HARQ process.
  • Figure 3: With network coding, the number of packets in flight can be increased by an order of how many original packets are included in a single code block.
  • Figure 4: New network coding layer introduced in the 5G protocol stack.
  • Figure 5: Optimizing MCS index for wait time vs. throughput for HARQ.
  • ...and 4 more figures