Invited TALK | "Service Provisioning in 5G Communication Networks" by Prof. Weihua Zhuang, Fellow of the Royal Canadian Academy of Sciences, Fellow of the Canadian Academy of Engineering
Date: 2019-05-08 Source:
Prof. Weihua Zhuang, Fellow of the Royal Canadian Academy of Sciences, Fellow of the Canadian Academy of Engineering gave a report on “Service Provisioning in 5G Communication Networks”, in which she introduced the specific researches of her team for the technical support of 5G communication networks. She started her report by briefly reviewing the development of 5G technology standards and the services and performance that 5G networks can provide. Next, Prof. Zhuang proposed some of the main challenges facing the current 5G technology, including the realization of large-scale machine to machine connection and the problem of a large number of terminals randomly connecting to the base station. Prof. Zhuang then presented some of the research outcomes she has achieved on these challenges.
The first work is the radio bandwidth slicing based on the Software Defined Network (SDN) and Network Function Virtualization (NFV) technology, the purpose of which is to optimize the allocation of radio resources between the macro base station and the small base station within the cellular network, reduce the interference among the base stations and control the terminal’s connection to the base station. The second task that her team undertakes is the “bottleneck resource generalized processor sharing algorithm”. Its purpose is to realize the bidirectional and rational allocation of data transmission and resources in the core network, thus reducing the overall delay. Constructing the virtual network topology for multicast service is another work of Prof. Zhuang. It aims at combining traditional routing transmission with the requirements for server processing, and establishing optimal path for data transmission and processing by adopting heuristic algorithm concept. And eventually the network load will be optimized by reducing the overall resource.
The audience was very interested in the research of 5G and network communication. As to the question of layout of SDN server, Prof. Zhuang believed that the layout of the network should follow the actual need and keep self-adjusting by machine learning. To answer the question of whether the single controller in SDN network would cause congestion and instability, Prof. Zhuang explained that although the SDN controller may be simplified to one in the algorithm model, in real scenario it tended to have multiple SDN controllers distributed at different levels. These controllers interacts with each other, so normally it would not have the problem of congestion due to one controller. In her explanation of the difference between virtual network topology and the traditional routing network, Prof. Zhuang said that in the virtual network topology it doesn’t only take data transmission into account, but it is also limited by data processing and server distribution. Therefore, the virtual network topology is a dynamic routing choice. The algorithm will flexibly control the resource allocation in the topology. The computing power of the virtual network topology may achieve self-optimization and dynamic adjustment in the future by machine learning.