The Differences of between ZigBee and Bluetooth technologies
The Differences of betweenZigBee and Bluetooth technologies Can Kaya 201171221 CENG 502 Computer Networks - Cankaya University Ankara, TURKEY November 15, 2012
What is a ZigBee Wireless Network? ZigBee networks can be cluster, star or mesh networks as shown in the diagram. Each ZigBee network has one device that is setup as a coordinator that controls and initializes the network. Other devices can either be setup as routers that can pass data or as End Points, that can only have one connection. End points or Reduced Function Devices can be set to sleep mode so they use very little power and so can be battery operated.Because of this very low power requirement, ZigBee is ideal for sensor networks or other control applications, whichrequire: Low to medium data rates Lots of nodes (up to 65,565) Easy addition or removal of nodes from network robust mesh network that doesnt fall over if one node fails very low power, battery operated equipmentZigBee protocols are intended for use in embedded applications requiring low data rates and low powerconsumption. ZigBee’s current focus is to define a general-purpose, inexpensive, self-organizing meshnetwork that can be used for industrial control, embedded sensing, medical data collection, smoke andintruder warning, building automation, home automation, etc. The resulting network will use very smallamounts of power – individual devices must have a battery life of at least two years to pass ZigBeecertification.ZigBee is a low-cost, low-power, wireless mesh networking proprietary standard. The low cost allows thetechnology to be widely deployed in wireless control and monitoring applications, the low power-usageallows longer life with smaller batteries, and the mesh networking provides high reliability and largerrange.ZigBee can activate (go from sleep to active mode) in 15 msec or less, the latency can be very low anddevices can be very responsive — particularly compared to Bluetooth wake-up delays, which are
typically around three seconds. Because ZigBees can sleep most of the time, average powerconsumption can be very low, resulting in long battery life.Where to use ZigBee? Building Automation Remote Control Home energy savings Health and fitness monitoring Smart homes Easy-to-use touchpads mice, keyboards, wands LED lighting control etc…What can ZigBee do for you?ZigBee protocols are intended for embedded applications requiring low data rates and low powerconsumption. The resulting network will use very small amounts of power — individual devices must havea battery life of at least two years to pass ZigBee certification Home Entertainment and Control — Home automation, smart lighting, advanced temperature control, safety and security, movies and music Wireless sensor networks — Starting with individual sensors like Telosb/Tmote and Iris from Memsic Industrial control Embedded sensing Medical data collection Smoke and intruder warning Building automationWhat is a Bluetooth Wireless Network? Bluetooth technology was invented in 1994 by engineers at Ericsson. Bluetooth is a standard and a communications protocol primarily designed for low power consumption, with a short range (power-class-dependent: 100m, 10m and 1m, but ranges vary in practice) based on low-cost transceiver microchips in each device. Bluetooth makes it possible for these devices to
communicate with each other when they are in range.Where to use Bluetooth?Specifically, Bluetooth connects devices such as; Mobile phones, PDA, laptops, Pcs together Modems, headsets, computer mouse, keyboards Digital Camera Personal digital assistants Printers, Fax machines Car Kits etc….Bluetooth exists in many products, such as telephones, modems and headsets.. I you are specific usersto file transfer or synchronization something, multi-functional cell phone and so on.What can Bluetooth do for you? The technology is useful when transferring information between two or more devices that arenear each other in low-bandwidth situations. Bluetooth is commonly used to transfer sound data withtelephones (i.e., with a Bluetooth headset) or byte data with hand-held computers (transferring files).For instance, you can use your phone or PDA to consult databases located in your laptop, or even toprint documents. You can use your MP3 player around the house to listen to music stored on your PC.Recently, car manufacturers such as BMW, Lexus and Toyota have equipped some of their models withBluetooth car kits. This allows you to use the features of your cell phone through the cars audio systemwhile the phone itself is stored away in the trunk, for instance.
What are differences between ZigBee and Bluetooth wirelessnetworks?There is a table about difference between ZigBee and Bluetooth wireless network technologies. Welisted major difference between the two technologies. ZigBee BluetoothRange 10-100 meters 10 metersNetworking Topology Ad-hoc, peer to peer, star, or mesh Ad-hoc, very small networksOperating Frequency 868 MHz (Europe) 2.4 GHz 900-928 MHz (NA), 2.4 GHz (worldwide)Complexity (Device Low Highand applicationimpact)Power Consumption Very low (low power is a design Medium(Battery option and goal)life)Security 128 AES plus application layer 64 and 128 bit encryption securityTypical Applications Industrial control and monitoring, Wireless connectivity between devices sensor networks, building such as phones, PDA, laptops, headsets automation, home control and automation, toys, gamesModulation technique Direct Sequence Spread Spectrum Frequency Hopping Spread SpectrumSpreading (DSSS) (FHSS)Protocol stack size 28 Kbyte 250 KbyteBattery Not rechargeable (one reason Intended for frequent recharging batteries will last for up to 10 years)Data Rate 250 Kbit/s 1 Mbit/sTypical network join 30 milliseconds 3 secondstimeApplication Monitoring and Control Cable replacementNumber of devices for 64K 7Network Industrial control and monitoring, sensor networks, building Wireless connectivity between devicesTypical Applications automation, home control and such as phones, PDA, laptops, headsets automation, toys, gamesPhysical/ MAC layers IEEE 802.15.4 IEEE 802.15.1Basic Cell star Piconet
Bluetooth is more oriented toward user mobility and eliminating short-distance cabling; ZigBee aimsmore for grand-scale automation and remote control.