Yufeng Wang, Athansios V. Vasliakos, Qun Jon and Hongbo Zhu

• Architecture: Device-to-Device Communications Technologies. Peer and Service Discovery in Proximity Service. Message Forwarding Strategies. Profile Matching and Recommendation Systems in Proximity Service. Proximity-Service Application Development Framework. Fundamental Issues: Smart Phone-Based Human Activity Recognition. Indoor Localization and Tracking Systems. Mobile Crowdsourcing with Built-in Incentives. Energy-Efficient Technologies in Device-to-Device-Based Proximity Service. Applications of Proximity Service: Vehicular Social Networks. Device-to-Device-Based Traffic Offloading.

Yufeng Wang, Athansios V. Vasliakos, Qun Jon and Hongbo Zhu

• Architecture: Device-to-Device Communications Technologies. Peer and Service Discovery in Proximity Service. Message Forwarding Strategies. Profile Matching and Recommendation Systems in Proximity Service. Proximity-Service Application Development Framework. Fundamental Issues: Smart Phone-Based Human Activity Recognition. Indoor Localization and Tracking Systems. Mobile Crowdsourcing with Built-in Incentives. Energy-Efficient Technologies in Device-to-Device-Based Proximity Service. Applications of Proximity Service: Vehicular Social Networks. Device-to-Device-Based Traffic Offloading.

Yufeng Wang, Athansios V. Vasliakos, Qun Jon and Hongbo Zhu

• Architecture: Device-to-Device Communications Technologies. Peer and Service Discovery in Proximity Service. Message Forwarding Strategies. Profile Matching and Recommendation Systems in Proximity Service. Proximity-Service Application Development Framework. Fundamental Issues: Smart Phone-Based Human Activity Recognition. Indoor Localization and Tracking Systems. Mobile Crowdsourcing with Built-in Incentives. Energy-Efficient Technologies in Device-to-Device-Based Proximity Service. Applications of Proximity Service: Vehicular Social Networks. Device-to-Device-Based Traffic Offloading.