Journal of the Korea Society of Computer and Information (한국컴퓨터정보학회논문지)

Korean Society of Computer Information (한국컴퓨터정보학회)
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Efficient Congestion Control for Interworking between 5G-System and LTE

  • Kim, Seog-Gyu (Dept. of Information & Communication Engineering, Andong National University)
  • Received : 2019.01.15
  • Accepted : 2019.02.12
  • Published : 2019.02.28
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Abstract

In this paper, we propose an efficient congestion control scheme for interworking between 5GS(5G system) and LTE(Long-Term Evolution), called ECC(Efficient Congestion Control). The proposed congestion control scheme (ECC) is considered for coexistence of 5GS and legacy LTE systems and provides a prompt service connectivity based on overriding method while the backoff timer is running in the UE. Also, we briefly introduce Rel-15 5GS from a congestion control perspective and the proposed ECC and simulation results for the existing legacy congestion control mechanism and ECC in the 5GS-LTE coexisting environment are presented. Lastly, the improvement direction is considered in future 3GPP 5GS phase 2 standard in this paper.

Keywords

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Fig. 1. 3GPP 5G System Architecture

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Fig. 2. 3GPP Interworking architecture between 5GS and LTE

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Fig. 3. End-to-end delay for SM 백오프

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Fig. 4. End-to-end delay for MM 백오프

Table 1. 3GPP 5G System Entities

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Table 2. Simulation Environment

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References

  1. 3GPP TS 23.501 v15.3.0: "System Architecture for the 5G System; Stage 2".
  2. 3GPP TS 23.502 v15.3.0: "Procedures for the 5G System; Stage 2".
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