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We develop an optimized FFT based Poisson solver on a CPU-GPU heterogeneous platform for the case when the input is too large to fit on the GPU global memory. The solver involves memory bound computations such as 3D FFT in which the large 3D data may have to be transferred over the PCIe bus several times during the computation. We develop a new strategy to decompose and allocate the computation between...
This paper presents a bandwidth-negotiation scheduling (BNS) for 802.16j MMR networks. The proposed BNS not only can allocate adequate bandwidth for UGS, rtPS, nrtPS, and BE in sequence of priority levels, but also can invoke negotiation between access and relay zones when the remaining bandwidth is insufficient to meet the minimum bandwidth requirement of rtPS or nrtPS. Besides, our BNS scheme can...
In some systems that employ overlay technology, nodes are highly heterogeneity. Classic routing protocols (such as Chord) consider nodes as homogeneous and all nodes maintain routing table with same size, taking on same routing load. Therefore the scalability of system is restricted by weakest node. Heterogeneity-aware routing mechanism (Hetero-RM) is proposed in this paper. It assigns each node certain...
Recently, the notions of compressed sensing (CS) have attracted attention as an innovative concept in signal processing. In this exploratory paper, a CS-based video compression approach suitable for wireless capsule endoscopy is proposed. In general, the amount of video data generated by capsule endoscopy is so large that video compression is the best way to lower the communication bandwidth and save...
This paper presents a generalized channel preemption model (GCPM) for multiclass traffic in mobile wireless networks. In the proposed model, a mobile call is identified by four parameters - call type, traffic class, channel requirement, and preemption ratio - in which different classes of traffic can have different priority levels. To effectively reduce dropping probability, high-priority handoff...
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