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We envisage extending the coverage of existing terrestrial wireless broadband wireless networks to the sea so that cost-efficient wireless access is available to the ships near the shore. The coverage extension is achieved through a multi-hop WiMAX wireless mesh networks where ships, maritime beacons and buoys are the nodes. In such a multi-hop network, routing protocol plays an important role in...
We envisage extending radio coverage of the existing terrestrial wireless broadband networks to the sea to provide ships with cost-efficient high-speed connection to the Internet. This is achieved by forming a WiMAX based maritime wireless mesh network where ships are network nodes connected to the land station across multiple hops. In such a maritime wireless mesh network, time slot allocation is...
WiMAX Mesh networking is of many advantages for intelligent transportation systems (ITS) applications. In long-hop-distance ITS networks, multi-channel transmission may alleviate problem of insufficiency of bandwidth when a network uses single frequency channel. This paper presents algorithm of multi-channel bandwidth allocation in WiMAX mesh networks. Simulation is carried out with a maritime simulator,...
Existing communications from ships via satellites are expensive. We are motivated to extend the cheaper terrestrial communication coverage to sea via multi-hop networking. Maritime environment presents new challenges because sea surface moves randomly resulting in wave occlusion that breaks communication links. This paper models the maritime communication link after considering the wave occlusion...
This paper details a novel approach of developing a low-cost and high speed maritime ship-to-ship/shore mesh network to complement or replace satellite communications in narrow water channels or traffic lanes close to shorelines. To design the system, we gathered requirements from typical users of the system. We then carried out preliminary studies such as radio channel propagation over sea water,...
We envisage coverage extension of the high bit rate terrestrial communication networks to the ships to reduce the cost in maritime communications. The coverage extension is achieved by forming a mobile wireless mesh network amongst neighboring ships, marine beacons and buoys. The wireless mesh network will be connected to the terrestrial networks across multiple hops via land stations at shore. In...
We are interested in extending the coverage of a terrestrial wireless communication network to the sea so that cost effective communications can be provided to the ships. The coverage extension can be achieved by using ships as relay nodes for other ships that are further away. This paper studies the feasibility of doing so at the Singapore east coast. The feasibility is based on having 90% of the...
We developed a framework for simulating wireless communications in the ocean environment, The framework incorporates three unique maritime features: the wave motion and its effect on wireless transmissions, the ocean surface path loss characteristics, and the mobility pattern of the ships conducting wireless transmissions. We implemented our design in the Qual-Net network simulator. Using the enhanced...
This paper gives an overview of the TRITON project that aims to develop a high-speed maritime ship-to-ship/shore mesh network. We present the general architecture of the TRITON system and detail our preliminary studies and findings that will help us determine the feasibility of using ships and shoreline base stations to form a mesh network.
An IEEE 802.16 MESH network is envisaged for multihop inter-ship communications and its MAC performance is investigated by simulations. Results show that, with respect to throughput, delivery ratio, and average delay, when sea wave direction is perpendicular to the nodes connection direction, good MESH MAC performance can be achieved in sea states 1.0, 3.0, 5.0, and 7.0, for both 1-hop and 2-hop CBR...
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