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In this paper, we identify the potential of the television bands to be used for providing vehicular infotainment service. Specifically, content delivery from the roadside unit to vehicular users is conducted by exploiting the spectrum holes, which is also referred to as spatial spectrum reuse. In this manner, the spectrum utilization efficiency is improved and the digital television service is not...
Random access algorithm is critical for the performance of interactive broadcasting system. Random access with Dynamic Window Size and Random Access Slots(D-WS-RAS) is proposed as an efficient way to tackle this problem in the interactive broadcasting system. This algorithm is composed of three parts: utilize Bayes' rule to estimate the number of access, dynamically set backoff window size and dynamically...
To satisfy interaction between users and service providers (SP) in lots of rural areas without enough communication infrastructure, a dedicated return channel for the terrestrial digital TV is demanded. Therefore, we propose a specification on Dedicated Return Channel (DRC) based on SC-OFDMA technique for future broadcast, and promote it to Advanced Television Systems Committee (ATSC). To efficiently...
Device-to-Device (D2D) communications potentially can improve spectrum efficiency because of resource spatial reuse. In this paper, we consider a central-controlled D2D architecture, in which a cellular operator can decide whether mobile devices can connect to each other directly. We aim to maximize system throughput while also achieve fairness in resource allocation. A resource scheduling algorithm...
The largest-scale high-performance (HPC) systems are stretching parallel file systems to their limits in terms of aggregate bandwidth and numbers of clients. To further sustain the scalability of these file systems, researchers and HPC storage architects are exploring various storage system designs. One proposed storage system design integrates a tier of solid-state burst buffers into the storage...
A Multi-Cyclic Redundancy Check (CRC) selective Hybrid Automatic-Repeat-reQuest (HARQ) scheme for improving the throughput efficiency of Multiple Input Multiple Output (MIMO) systems is proposed in this paper. According to different feedback information from the receiver, the proposed HARQ scheme employs two strategies, referred to as retransmission frame selection and space diversity. These two strategies...
Wireless Mesh Network (WMN) is a promising broadband wireless network architecture. Security is an important component of the WMN architecture but is not fully considered so far. In this paper, we introduce a prototype secure wireless mesh network testbed called SJTU-MESH built by Shanghai Jiao Tong University. The detailed design and implementation of secure WMN nodes are presented, and the construction...
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