Low latency SDN-based MEC with priority flow scheduler in cellular networks

• Main Authors: Huang, Po-Hao, 黃柏豪
• Other Authors: Li, Chi-Yu
• Format: Others
• Language: en_US
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/sacfr6

碩士 === 國立交通大學 === 網路工程研究所 === 108 === Multi-access edge computing (MEC) is considered as a key factor to offer low-latency ser- vices in 4G/5G networks. However, we discover that the existing base station scheduler does not differentiate MEC traffic from the others. This might cause additional latency on the MEC traffic. Under different scenarios, we validate that such delays do exist in the current cellular networks. The main reason is that current schedulers do not prioritize the MEC traffic. Instead, they focus on the fairness of physical radio resources among multiple user equipments (UEs). To this end, we seek to propose a standard-compliant solution that does not make any modifi- cations on the existing network components. The major idea is to carry out a two-tier priority flow scheduling based on our fair service curve model of the MEC platform. We prototype and implement the solution using commodity LTE base stations and an open source LTE core network. We finally evaluate the performance of our prototype and discuss its downside.