Abstract

Light fidelity (LiFi) is a recently proposed wireless technology that operates in a way similar to wireless fidelity (WiFi) but uses light as a signal bearer. Combining the high-speed data transmission of LiFi and the ubiquitous coverage of WiFi, hybrid LiFi and WiFi networks (HLWNets) are able to improve the system capacity of indoor wireless communications. Meanwhile, the process of access point (AP) selection becomes challenging, since the coverage areas of different networks completely overlap each other. Relying on instantaneous channel information, the conventional load balancing method assigns each user to a specific AP, providing the optimal solution for a given time instant. However, this method might cause frequent handovers for mobile users and compromise their throughputs. In this paper, mobility-aware load balancing (MALB) methods are proposed for HLWNets in both single transmission (ST) and multiple transmission (MT) modes. In the ST mode, each user is served by only one AP, chosen from either LiFi or WiFi. In this mode, the proposed method assigns each user to a certain type of network over a period of time, to suppress vertical handovers. In the MT mode, each user is simultaneously served by LiFi and WiFi, and no vertical handover occurs. A joint optimization problem is formulated to balance traffic loads between LiFi and WiFi in this mode. Results show that against the conventional load balancing method, MALB-ST and MALB-MT can improve system throughput by up to 46% and 76%, respectively, with significantly reduced computational complexity.

© 2019 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Joint Optimization of Power Allocation and Load Balancing for Hybrid VLC/RF Networks

Mohanad Obeed, Anas M. Salhab, Salam A. Zummo, and Mohamed-Slim Alouini
J. Opt. Commun. Netw. 10(5) 553-562 (2018)

Design and Analysis of a Visible-Light-Communication Enhanced WiFi System

Sihua Shao, Abdallah Khreishah, Moussa Ayyash, Michael B. Rahaim, Hany Elgala, Volker Jungnickel, Dominic Schulz, Thomas D. C. Little, Jonas Hilt, and Ronald Freund
J. Opt. Commun. Netw. 7(10) 960-973 (2015)

Client-Weighted Medium-Transparent MAC Protocol for User-Centric Fairness in 60  GHz Radio-Over-Fiber WLANs

G. Kalfas, P. Maniotis, S. Markou, D. Tsiokos, N. Pleros, L. Alonso, and C. Verikoukis
J. Opt. Commun. Netw. 6(1) 33-44 (2014)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (10)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Tables (1)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (26)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription