Efficient Railroad Wireless Communication Scheme Using 3GPP LTE and WiFi Interworking
Kwang Kiun Yoo, Ronny Yongho Kim · Advanced Science and Technology Letters · 2013
In order to offload heavy traffic of cellular network, WiFi has chosen since WiFi normally operates in license exempt bands. 3rd Generation Partnership Program (3GPP) has started study item on 3GPP-WiFi interworking in order to alleviate heavy traffic problem. Global System for Mobile-Railroad (GSM-R), which is an extension of GSM, is the standard providing railroad wireless communication. As a next generation of GSM-R, Long Term Evolution (LTE) has been studied. Same problem of heavy traffic wireless network is anticipated for LTE-R. LTE-WiFi interworking has a technical challenge of WiFi network detection. In this paper, we propose LTE and WiFi interworking scheme for railroad wireless communication.