… their loved ones since the communication infrastructures were … to realize the importance of
device-to-device communications… of decentralized infrastructureless multihop communication, …

… Under this background, there has been increased interest recently in device-to-device (D2D) …
D2D communications in infraless/down situations [4]. Direct communication between two …

… focus on one-hop D2D communication, researchers from Tohoku University developed a
D2D system “Relay-by-Smartphone” to realize multihop D2D communications [92] for disaster …

… in a multihop fashion [13]. According to the real-time mobility, as well as the battery level, relay
by smartphone … direct device-to-device communication between any pair of smartphones. …

… and then the resource allocation issues in licensed band D2D, which can be realized in …
Relay-by-smartphone is a decentralized multi-hop D2D communication system developed …

… prototype called “Relay-bySmartphone”. This prototype is based on multi-hop D2D
communication for disaster relief … Kato, “Relay-by-smartphone: realizing multihop device-to-device …

… Achieving high energy efficiency in communications is crucial to IoT devices, typically … As
also discussed in [93], multi-hop D2D communication introduce potential security risks when …

… and SE of multi-hop D2D communications overlaying cellular … strategy (OAFS) for multi-hop
D2D communications that … realized in three different ways: 1) Cellular communications …

… , which enables direct communication between proximate … We examine a scenario of
multi-hop D2D communication … and they synchronized themselves after achieving RDV. During …

… based on the concept of wireless Multi-hop communication abstraction. In [6], … communication
as well as a virtual AP (VAP) to extend the network. This formed a tree-based multi-hop …