Green Heterogeneous Wireless Networks

Chapter 10Emerging Device-Centric Communications

Smartphones are equipped with multiple radio interfaces that enable them to access different types of wireless networks, including WLANs, Bluetooth and Zigbee, besides cellular networks. Emerging device-centric systems (DCS) such as devices-to-device communications are considered standard components of future mobile networks, where operators/consumers involve their devices in direct communications to improve the cellular system throughput, latency, fairness and energy efficiency. However, the battery life of the mobile devices involved in such communications is crucial for 5G smartphone users to explore the potential of emerging applications in DCS. It is anticipated that the owners of 5G-enabled smartphones will use their devices to talk, text, e-mail and surf the Internet more often than the customers with 4G smartphones and traditional handsets, which puts a significantly higher demand on the battery life. This chapter introduces a new scheme to support emerging features in DCS, where a device-to-device (D2D)-enabled mobile device (sink device or a content requester) aggregates the radio resources of multiple mobile devices (source devices or content providers) to improve the file transfer latency (FTL), energy efficiency and battery life. This scheme is referred to as devices-to-device (Ds2D) communications. In such a networking setting, this chapter discusses a network-controlled algorithm for optimal selection of source ...