Simulation Study of Low-Latency Network Model with Orchestrator in MEC

Katsuyoshi IIDA
Hiroyuki KOGA
Katsunori YAMAOKA

IEICE TRANSACTIONS on Communications   Vol.E102-B    No.11    pp.2139-2150
Publication Date: 2019/11/01
Publicized: 2019/05/16
Online ISSN: 1745-1345
DOI: 10.1587/transcom.2018EBP3368
Type of Manuscript: PAPER
Category: Network
mobile edge computing,  low-latency network,  orchestrator,  processor sharing,  simulation,  

Full Text: FreePDF

Most of latency-sensitive mobile applications depend on computational resources provided by a cloud computing service. The problem of relying on cloud computing is that, sometimes, the physical locations of cloud servers are distant from mobile users and the communication latency is long. As a result, the concept of distributed cloud service, called mobile edge computing (MEC), is being introduced in the 5G network. However, MEC can reduce only the communication latency. The computing latency in MEC must also be considered to satisfy the required total latency of services. In this research, we study the impact of both latencies in MEC architecture with regard to latency-sensitive services. We also consider a centralized model, in which we use a controller to manage flows between users and mobile edge resources to analyze MEC in a practical architecture. Simulations show that the interval and controller latency trigger some blocking and error in the system. However, the permissive system which relaxes latency constraints and chooses an edge server by the lowest total latency can improve the system performance impressively.