Date Added: Aug 2012
As zigbee is an standard for wireless personal network. Tree routing is simple routing where the node communication is restricted to parent-child links only. There is no routing discovery in tree routing as well as routing overhead. But one demerit of tree routing is that end to end delay is increased during packet transmission which resulting more energy usage or energy consumption. After that when deeply study of Extended tree routing or improved tree routing in that neighbor table are implemented but finding the best neighbor node or apt node is not implemented.