An Energy Efficient Zigbee Standard 802.15.4 Enviornment for a Holter Device

ZigBee-style networks began to be conceived around 1999, when many installers realized that both Wi-Fi and Bluetooth were going to be unsuitable for many applications. In particular, many engineers saw a need for selforganizing ad-hoc digital radio networks. The real need for mesh has been cast in doubt since that, in particular as mesh is largely absent in the market. The fir stack release is now called ZigBee 2004. The second stack release is called ZigBee 2006, and mainly replaces the MSG/KVP (Message/Key Value Pair) structure used in 2004 with a "cluster library". The 2004 stack is now more or less obsolete. The cellular network was a natural extension of the wired telephony network that became pervasive during the mid-20th century. As the need for mobility and the cost of laying new wires increased, the motivation for a personal connection independent of location to that network also increased. ZigBee technology is a low data rate, low power consumption, low cost, wireless networking protocol targeted towards automation and remote control applications. ZigBee looks rather like Bluetooth but is simpler, has a lower data rate and spends most of its time snoozing. ZigBee routing algorithm can be thought of an hierarchical routing strategy with table-driven optimizations applied where possible. The routing layer is said to start with the well-studied publicdomain algorithm Ad hoc On Demand Distance Vector (AODV) and Motorola’s Cluster-Tree algorithm.