Mobile Instant Messaging (IM) apps, such as WhatsApp and WeChat, frequently send
heartbeat messages to remote servers to maintain always-online status. Periodic heartbeat …

Mobile Instant Messaging (IM) apps, such as WhatsApp and WeChat, frequently send
heartbeat messages to remote servers to maintain their always-online status. Periodic …

With the rapid proliferation of smartphones, hundreds of millions of mobile users are
attracted to Instant Messaging (IM) apps. While such apps have brought convenience to our …

The massive admiration of cellular devices has stimulated a flourishing growth of high data
rate wireless services, which has sparked an insisting need for more efficient spectrum …

Device-to-Device (D2D) communications in cellular networks allow devices to communicate
directly without going through the base station (BS). In this paper, we have established a …

With the high penetration rate of smart mobile devices, it is appealing to exploit device-to-
device (D2D) communications for data dissemination, eg, in disaster alerts and event …

Energy saving solutions on smartphone devices can greatly extend a smartphone's lasting
time. However, today's push services require keep-alive connections to notify users of …

The Device-to-Device (D2D) communication allows two user devices to communicate
directly without passing through the Base Station (BS). Most of the existing researches for …

There is a continuous requirement to increase the capacity of cellular communication
system. Device to Device communication is a technology of upcoming generation cellular …

Device-to-Device (D2D) communication in 5G networks is designed to offload the traffic on
the core networks and backhaul links, and to provide faster and energy-efficient access to …