28 Dec '15, 12am

Wireless Sensor Networking for the Industrial Internet of Things

One general principle in designing a network for reliability is redundancy, where failover mechanisms for likely problems enable systems to recover without data loss. In a wireless sensor network, there are two basic opportunities to harness this redundancy. First is the concept of spatial redundancy, where every wireless node has at least two other nodes with which it can communicate, and a routing scheme that allows data to be relayed to either node, but still reach the intended final destination. A properly formed mesh network – one in which every node can communicate with two or more adjacent nodes – enjoys higher reliability than a point-to-point network by automatically sending data on an alternate path if the first path is unavailable. The second level of redundancy can be achieved by using multiple channels available in the RF spectrum. The concept of channel hoppi...

Full article: http://www.newelectronics.co.uk/electronics-technology/wi...

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