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Wireless Smart Utility Network (Wi-SUN) combining TV White Space (TVWS), which leverages the benefits of TVWS for Wi-SUN with a view to improvement associated with coverage, bandwidth, scalability of current Wi-SUN, receives overwhelming attention. The recently released standard IEEE 802.15.4m details techniques to enable Wireless Personal Area Network (WPAN) work in TVWS. We develop the first IEEE...
The scattering centers induced by creeping waves on cone-shaped targets are studied. Because of separated transmitters and receivers, the scattering centers could be observed in bistatic mode, especially under situation of large bistatic angles. Although induced by the same scattering mechanism, i.e., creeping waves, scattering centers on different profiles of cone-shaped targets have distinguished...
This paper proposes a MAC protocol using multiple control channels for multi-channel ad-hoc network. In the proposed protocol, all channels are divided into some groups. Each group has a control channel. All nodes hops the control channels for searching a receiver. Because of using multiple control-channels, control frame collisions and the effect of searching overhead are mitigated in the proposed...
In multi-channel wireless ad-hoc network, the nodes need to negotiate the channel reservation. Preparing the control channel is one of the strategies for the channel reservation. When the control channel congests due to frame collisions, the control channel is bottleneck for obtaining high throughput. This paper proposes a MAC protocol for multi-channel wireless ad-hoc network for frame collision...
This paper proposes a MAC protocol for ad hoc networks with directional antennas for mitigating the directional hidden-node problem. In the proposed protocol, it is possible to tell the communication situation to the directional hidden node by using DATA-frame fragmentations and short busy advertisement signals. As a result, the frame collisions induced by the directional hidden nodes can be reduced...
In modern container terminal operations, the Global Positioning System(GPS) is applied to navigating the rubber-tired gantry crane (RTG) to eliminate operation mistakes. Both GPS navigating system and container terminal operation system such as COSMOS are parallel. However, the navigating system can be integrated into a container terminal operation system. To do this, the following 4 problems must...
Wireless ad hoc networks are expected to provide broadband services parallel to their wired counterparts in near future. To address this need, MIMO (multiple-input-multiple-output) antenna techniques hold significant promise. Most previous work on capacity analysis of ad hoc networks is based on an implicit assumption that each link exclusively occupies a geometric area, referred to as exclusion region...
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