Cross-Layer Design for Mission-Critical IoT in Mobile Edge Computing Systems

Changyang She, Yifan Duan, Guodong Zhao, Tony Q.S. Quek, Yonghui Li, Branka Vucetic

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

In this paper, we establish a cross-layer framework for optimizing user association, packet offloading rates, and bandwidth allocation for mission-critical Internet-of-Things (MC-IoT) services with short packets in mobile edge computing (MEC) systems, where enhanced mobile broadband (eMBB) services with long packets are considered as background services. To reduce communication delay, the fifth generation new radio is adopted in radio access networks. To avoid long queueing delay for short packets from MC-IoT, processor-sharing (PS) servers are deployed at MEC systems, where the service rate of the server is equally allocated to all the packets in the buffer. We derive the distribution of latency experienced by short packets in closed form, and minimize the overall packet loss probability subject to the end-to-end delay requirement. To solve the nonconvex optimization problem, we propose an algorithm that converges to a near optimal solution when the throughput of eMBB services is much higher than MC-IoT services, and extend it into more general scenarios. Furthermore, we derive the optimal solutions in two asymptotic cases: communication or computing is the bottleneck of reliability. The simulation and numerical results validate our analysis and show that the PS server outperforms first-come-first-serve servers.

Original languageEnglish
Article number8772198
Pages (from-to)9360-9374
Number of pages15
JournalIEEE Internet of Things Journal
Volume6
Issue number6
DOIs
Publication statusPublished - 2019 Dec

All Science Journal Classification (ASJC) codes

  • Signal Processing
  • Information Systems
  • Hardware and Architecture
  • Computer Science Applications
  • Computer Networks and Communications

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