Wireless Sensor Networks " Mesh Networking"

• Self-forming, Self-healing
• Low-power (5+ years of Battery-life)
• Flexible Topologies – Including Star, Hybrid-Star and Mesh
  

XMesh is a full featured multi-hop, ad-hoc, mesh networking protocol developed by Crossbow for wireless networks. An XMesh network consists of nodes (Motes) that wirelessly communicate to each other and are capable of hopping radio messages to a base station where they are passed to a PC or other client. The hopping effectively extends radio communication range and reduces the power required to transmit messages.

By hopping data in this way, XMesh can provide two critical benefits, improved radio coverage and improved reliability. Two nodes do not need to be within direct radio range of each other to communicate. A message can be delivered to one or more nodes in-between which will route the data. Likewise, if there is a bad radio link between two nodes, that obstacle can be overcome by rerouting around the area of bad service. Typically the nodes run in a low power mode, spending most of their time in a sleep state, in order to achieve multi-year battery -life.

XMesh is a software library, using the TinyOS operating system that runs on embedded devices called Motes. All wireless mesh networking systems share a set of common requirements. These include:

• Low-power Consumption
• Ease-of-Use
• Scalability
• Responsiveness
• Range

XMesh Key Features:

• Reliable, Multi-hop Mesh Networking
• Self-forming and Self-healing Network
• Star, Hybrid-star (ZigBee) and Mesh Topology for Entirely Battery Operated Networks
• Over-the-Air Programming (XOtap)
• Fully Bi-Directional Communication with Fast Response Times
• 802.15.4 /ZigBee Support

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Wireless Sensor Networks

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Sensor network

Why Wireless?

Wireless sensor networks represent an entirely new way of looking at computing. In a sensor network, dozens, hundreds, or even thousands of tiny, battery-powered computers, often called “Motes”, are scattered throughout the environment to collect sensor data, e.g. light, temperature, humidity, vibration. The Motes form an adhoc network that relays the sensor data, to a specified destination for processing. This sensory input gets analyzed by more traditional enterprise computing system to optimize operational processes.

Crossbow’s XMesh technology delivers a mesh networking solution for self-forming, self-healing wireless sensor applications. Over-the-air-programming enables live updates and provisioning of deployed networks.

Crossbow’s Radio Communication: Our hardware platform provides highly optimal microcontroller, radio and sensor integration for low-cost, low-power sensor applications with multiple frequency bands.

The XServe gateway server middleware allows easy integration of the wireless sensor network with enterprise computing systems.

The MoteView visualization and management tool enables to optimize network configuration and analyze sensor information interactively.

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