Internet on the train
نویسندگان
چکیده
AN Internet connection on the train offers a lot of perspectives for the passengers [1]. Within the train they can now enjoy leisure activities like infotainment, on line gaming, web surfing, Video on Demand etc. Business travelers have a virtual office during their journey with applications such as e-mail and video conferencing. But apart from gaining additional revenues due to both Internet access billing and increased ticket sales, an Internet connection comes with other additional advantages for train operators. Those include extra services towards the passengers such as travel and touristic information but also enhanced internal applications: fleet management, crew communication, CCTV, tele-diagnosis etc. Although several trials and early commercial releases already deliver wireless Internet to passengers in fast moving vehicles, many issues remain unresolved: • Broadband Internet: current solutions only provide a limited bandwidth to be shared by a many users • Continuity: Uninterrupted Internet connectivity will only be possible through seamless handover between heterogeneous wireless access technologies • Quality of Service: current solutions do not offer any QoS in terms of bandwidth and latency, and certainly do not take into account the
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