the location the engine

This part focuses on RSSI-based location methods relying on the location the engine in CC2431 to calculate position of location node (also known as mobile nodes). The whole algorithm is based on the protocol stack ZigBee2006 platform. Discussed in detail the communication rules of three kinds of nodes (reference nodes, blind node, the gateway node) between them (9 kinds of 12hot cheap prom dresses string command). These string command defined the information that nodes in order to calculate the coordinates, For example, gateway nodes (also called the coordinator node) receive packets of coordinates location node sends, send data packet need for configuring reference node or blind sell discount wedding dresses nodes the data packet, Reference node to receive packet blind node request to collect RSSI average value, packet response to request of RSSI blind node sends. After blind nodes have wedding gowns dresses collected all the parameters and coordinates, and save them into register MEASPARM and REFCOORD, which are used to calculate coordinates by location engine. Because of the algorithm of the location process were firmed in the location Engine, there are no way to know which algorithm are discount wedding gowns used for location, so we implemented the triangular measurement method and maximum likelihood cheap jeans shop estimation method to compare with the coordinates the location engine calculated, in the calculation of the algorithm the signal strength between nodes is important, but the sensor nodes only collect RSSI value, so we derived relationship between the physical distance, signal strength and RSSI value ,which aim at convert three kinds of values into each other.
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