ABSTRACT
Contents Abstract ................................................................................................................................... 436 20.1 Introduction ................................................................................................................... 436 20.2 System Overview ............................................................................................................ 437
20.2.1 System Description and Model ........................................................................... 437 20.2.2 Vehicular Mobility .............................................................................................. 438 20.2.3 Antenna Orientation ........................................................................................... 440 20.2.4 Content Transmission ......................................................................................... 441
20.3 Codebook Design for Beamforming .............................................................................. 442 20.3.1 Codebook Design ............................................................................................... 442 20.3.2 Training Stage .................................................................................................... 444 20.3.3 Performance Evaluations ..................................................................................... 446
20.4 Beamforming for Multicasting ........................................................................................450 20.4.1 Communication Model .......................................................................................451 20.4.2 Multicast Beamforming Scheme ..........................................................................453 20.4.3 Performance Evaluation .......................................................................................455
20.5 Fluid Approximation-Based Model and Results ..............................................................458 20.5.1 Dissemination Time Model .................................................................................458 20.5.2 Numerical Results .............................................................................................. 460
20.6 Conclusion ..................................................................................................................... 462 Acknowledgments ................................................................................................................... 463 References ............................................................................................................................... 463
Abstract With the popularity of mobile data and applications, we introduce the system of collaborative and opportunistic mobile content dissemination with directional antennas, where the content is distributed within the network by device-to-device opportunistic communications and the network nodes are equipped with directional antennas. In such a system, opportunistic contact between mobile devices carried by humans or vehicles, is capable of providing high-bandwidth communication capacity for content dissemination via short-range communication technologies like millimeter wave communications, Ultra-Wide Bandwidth (UWB), and so on, which is known as opportunistic collaborative content dissemination.
