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Ke Xu - IEEE Xplore Author Profile

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Leveraging multiple wireless technologies and radio access networks (RANs), vehicles on the move have the potential to get robust connectivity and continuous service. To support the demands of as many vehicles as possible, an efficient and fast network selection scheme is critically important to achieve high performance and efficiency. So far, prior works have primarily focused on design of optimi...Show More
This paper introduces GENI Cinema (GC), a system that provides a scalable live video streaming service based on dynamic traffic steering with software defined networking (SDN) and demand driven instantiation of video relay servers in NSF GENI's distributed cloud environments. While the service can be used to relay a multitude of video content, its initial objective is to support live video streami...Show More
This paper proposes a system architecture for supporting efficient broadband data delivery in infrastructure based vehicular networks. The proposed approach addresses two major challenges for high throughput data transport from Internet to moving vehicles over infrastructure wireless networks such as today's 4G technologies: difficulty in maintaining stable throughput over high latency wide area p...Show More
This paper proposes a cloud-based architecture for enhancing the performance and capacity of vehicular networks of potentially multiple different wireless technologies. The approach addresses the well-known limitations of today's vehicle-initiated as well as base station-assisted handoff solutions; the former is reactive, therefore slow and inefficient, while the latter is mostly limited to within...Show More
This paper proposes four schedulers using location information and side information in telematics applications for vehicular networks. The scheduler algorithms consider peak traffic and link reliability, achieving savings of channel resources and reducing the number of retransmissions. A key feature of the proposed schedulers is the use side information in the form of a coverage map, which provide...Show More
This paper proposes an analytical throughput model for IEEE 802.11-based vehicle-to-infrastructure networks with omni-directional antennas (OA) and directional antennas (DA) applied in three different ways. The model considers the antenna gain pattern, multipath effect, co-channel interference, variable link rates and mobility effects. When DAs are applied, the deafness and hidden terminal problem...Show More