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In this paper, we will introduce the necessity of real-time safety monitoring system for high-speed railway vehicle and propose a new type of safety monitoring system using a low-power wireless connection. To verify the proposed safety monitoring system is feasible, we measure the packet error rate on the moving train and show the analyzed results.
Multicast services need to satisfy all mobile devices even under very bad channel conditions. However, the method for accommodating this will result in the throughput of the service being determined and limited by the channel state of the mobile device with the worst channel conditions. In this way, the capacity of mobile devices under a good channel state is determined based on the capacity of the...
Wireless power transfer (WPT) charging technology using magnetic field can transfer power to battery for drone without any electrical contact. It can be one of the safe and convenient battery charging methods. In spite of the great advantages, WPT system generates strong electromagnetic fields (EMFs), which causes interference on the electrical devices such as DGPS, speed controller, Bluetooth data...
A lot of research have been done in wireless sensor networks (WSNs) based on IEEE 802.15.4. However, there is no study that the status of a device is monitored by the PAN coordinator in the IEEE 802.15.4 technology in order to reduce radio resource wastage. In this paper, we propose a procedure that the PAN coordinator can detect that the operation of a device is well. Therefore, we can utilize radio...
Channel state information (CSI) reporting at one mobile station (MS) often targets maximizing the throughput of one single link, hence is optimized for single-user multi-input multi-output (SU-MIMO) transmission at base station (BS). However, the system wide throughput may not be maximized when BS is performing multi-user multi-input multi-output (MU-MIMO) transmission utilizing the SU-MIMO optimized...
In this paper, a novel observe-and-forward (OF) cooperative scheme is proposed for relay-enhanced wireless cooperative systems. In this scheme, the codewords transmitted from the source are regenerated by the decoder at the relay and forwarded without re-encoding or interleaving. The decoding processes for different streams of a transmitted codeword can be parallel, which greatly reduces the relaying...
The new concept of customer infrastructure that can improve energy efficiency and accept various distributed energy resources for the electric industry to grow constantly for the next decades solving global energy security crisis and global warming problem from excessive CO2 emission. AMI (advanced metering infrastructure), the customer service infrastructure between the end user and the electric...
An efficient method for transmitting the robot control data over wireless Internet based on UDP protocol is proposed. The method allocates the highest priority to the robot control data and transmits them multiply from the base station. Simulation results show that very low packet delay and low packet errors can be achieved by the proposed method.
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