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Due to the 60Hz or higher LCD refresh operations, display controller (DC) reads the pixels out from frame buffer at fixed rate. Accessing frame buffer consumes not only memory bandwidth, but power as well. Thus frame buffer compression (FBC) can contribute to alleviating both bandwidth and power consumption. A conceptual frame buffer compression model is proposed, and to the best of our knowledge,...
In this paper, we propose an optimization model under the scenario where multi-channels are cooperatively sensed and used by multi-secondary users (SUs). The model aims to maximize the system throughput and optimize the parameters including the sensing time and the weight coefficient of the sampling result of each SU for each channel, meanwhile the false access probability for each channel must not...
Existing literature in Cooperative Cognitive Radio Networks (CCRNs) always assumed a scenario where only one Primary User (PU) and several Secondary Users (SUs) coexist. However, in practice, multi-PUs and multi-SUs always coexist and the number of SUs is usually greater than that of PUs. Under such complex yet real scenarios, we assume that each PU not only allows a set of SUs to access its pre-allocated...
In this paper, we propose an optimization model under the scenario where multi-channels are cooperatively sensed and used by multi-secondary users (SUs). The model aims to maximize the system throughput and optimize the parameters including the sensing time and the weight coefficient of the sampling result of each SU for each channel, meanwhile the false access probability for each channel must not...
Barrier coverage is a hot issue in wireless sensor networks for its various applications, such as border surveillance and intrusion detection. In wireless sensor networks, it is a very important problem that how to prolong the network life time. In this paper, we focus on the problem that how to prolong the network lifetime for barrier coverage application. Firstly, the surveillance region is divided...
To achieve scalability, a few resource-rich heterogeneous nodes are scattered in a wireless sensor network consisting of a large number of energy-constrained sensor nodes. Heterogeneous nodes are equipped with powerful radio transceiver and their main task is to organize a backbone communication network and to relay data to the sink. For the scenario, this paper proposes a coverage problem which maintaining...
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