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A mobile hotspot in a vehicular environment consists of a group of end users that move as a whole in a public transit. This paper analyzes the performance of video service in mobile hotspots based on heterogeneous wireless technologies. The authors jointly consider the contention-based random access of the WLAN for the link layer, adaptive modulation and coding of the WWAN link at the physical layer, and batch packet arrivals of video traffic at the application layer. Taking into account the highly varying WWAN link due to vehicle mobility and multipath fading, they analyze the delay and loss performance of video service at the packet level.
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