Cloud transcoder: bridging the format and resolution gap between internet videos and mobile devices
Proceedings of the 22nd international workshop on Network and Operating System Support for Digital Audio and Video
Airlift: Video conferencing as a cloud service using inter-datacenter networks
ICNP '12 Proceedings of the 2012 20th IEEE International Conference on Network Protocols (ICNP)
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With the advancements in wireless networks and the pervasive adoptions of smartphones with camera capabilities, hundreds of millions mobile users are attracted to video messaging services on their smartphones. Unlike text messaging, transmitting large video messages (with a size of ~ 10 MBytes vs. a 140 Bytes limit for text messages) demands effective network resource provisioning. In this work, we investigate current practices of video messaging on smartphones. Focusing on the two most popular video messaging services, WhatsApp and WeChat, we conduct extensive experiments with commodity smartphones based on the three mainstream mobile OSes, namely, iOS, Android, and Windows Phone, from both the USA and China. We find that WhatsApp and WeChat have different resource provisioning strategies when serving video messaging clients, leading to a degraded service experience for WeChat users compared to WhatsApp users. Neither WhatsApp nor WeChat provides location aware service that can significantly improve the user experience. We further evaluate a few enhancements that can help reduce end-to-end delay in video messaging services. Our results provide new insights for both service providers and users for this type of newly emerging services.