Edinburgh Research Explorer

Joint Optimisation of Load Balancing and Handover for Hybrid LiFi and WiFi Networks

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Original languageEnglish
Title of host publication2017 IEEE WIRELESS COMMUNICATIONS AND NETWORKING CONFERENCE (WCNC)
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Number of pages5
Publication statusPublished - 2017
EventIEEE Wireless Communications and Networking Conference (WCNC) - San Francisco, Canada
Duration: 19 Mar 201722 Mar 2017

Publication series

NameIEEE Wireless Communications and Networking Conference
PublisherIEEE
ISSN (Print)1525-3511

Conference

ConferenceIEEE Wireless Communications and Networking Conference (WCNC)
CountryCanada
CitySan Francisco
Period19/03/1722/03/17

Abstract

Recently a promising concept of hybrid networks based on light fidelity (LiFi) and wireless fidelity (WiFi) emerged. The idea is to combine ultra-small cell LiFi networks with ubiquitous coverage radio frequency (RF) communication systems. In such a hybrid network, WiFi access points (APs) serve a relatively large coverage area with limited bandwidth, and are thus susceptible to traffic overload. This issue is magnified with an increasing number of users because of the inefficient medium access control (MAC) in WiFi systems. LiFi can alleviate this issue by providing additional capacity. LiFi cells, however, have a limited coverage and this could result in significant handover overhead. A conventional load balancing (LB) method optimises the network throughput when the signal-to-noise ratio (SNR) of each user is known and fixed. Although this method delivers maximum throughput at a given time instance, it fails to consider the throughput loss due to handover, especially in an indoor scenario where users may frequently switch between APs. Taking the handover overhead into account, in this paper we propose a novel LB method that focuses on optimising the network throughput over a period of time. Simulation results show that the proposed method can increase the system throughput by up to 70% compared to existing LB methods.

    Research areas

  • LiFi, WiFi, attocell, hybrid network, handover, load balancing, MOBILE COMMUNICATIONS

Event

IEEE Wireless Communications and Networking Conference (WCNC)

19/03/1722/03/17

San Francisco, Canada

Event: Conference

ID: 47199539