Saturday 13 September 2014

  Wireless technologies

What is wireless technology?
A wireless technology such as cell phones, that users rsdio waves to transmit and receive data. It is use d increasingly for data trasmission.
Published by Houghton Mifflin company.
The main types of wireless technology
Here are the main types, listed as applications
1)Voice Communications                                                                                  2)Remote Control                                                                               3)Entertainment                                                                                                4) item tracking ect.                                                                                                       
1)Voice communications-This is where it all started... people just talking to each other over radios.Each was the size of about a hundred cellphones! While it was nice to communicate with an actual person, it was a  very slow way to exchange information. And wireless is good for much more than just a two-way voice  conversation. Cellphones are now the preferred means of voice communication, but they also allow texting and internet access.
2)remote control- There are many types of wireless technology remote controllers and you’ll already know about some of these... but some are a bit less well-known   
1)TV remote                                                                                                                                         2)Car remote access key ring                                                                                                3)Garage door opener                                                                                                                     4)Heat pump remote                                                                                                                     5)Wireless dog fence                                                                                                                          6)CD and DVD player controller                                                                                              7)Interactive games controller                                                                                8)Remote control of your house lights using your cellphone                                                      9)Remote control of spacecraft from an earth station                                                             10) wireless doorbell
Control applications-Some are more sophisticated than others, and usually require the thing they are controlling to acknowledge that it has correctly received the command… and acted on it! Otherwise it’s just a case of send, and hope the other party received what you sent. Not ideal, but now we can do better than this. Getting that acknowledgement tells you the command was successful. Not getting it allows you the option of trying again... as many times as you like, to get the result you want. And if you don’t get it? Well, at least you know!
Protocol-If the sender and the receiver have an agreed set of rules (protocol) on how they’ll communicate with each other, things go much more smoothly. A bit like people driving cars … road rules are the protocol that keeps the traffic flowing smoothly. Most types of wireless technology share this hidden, but very important function. Wireless protocols do the same for wireless traffic, minimizing collisions between packets of data traveling on the same wireless superhighway. Wireless protocols are allowing wireless devices to co-operate at ever-increasing levels of sophistication – making the whole wireless world, not just controllers, more efficient, reliable and dependable.
3) Entertainment- Entertainment is one of the types of wireless technology that is going to allow us to have some quite surreal experiences in the years to come. But a simple application, being able to record or listen to music without being tethered by a wire lets you do other things at the same time and is great if you need to move around.
Examples                                                                                                                                    Here are some products that are popular for wireless entertainment...
Wireless speakers                                                                                                               Wireless headphones                                                                                                                   Wireless earbuds                                                                                                  Wireless Microphone                                                                                    Wireless home theatre                                                                                       Interactive wireless games
4) Item Tracking- You can now track items easily, accurately and cheaply by attaching wireless Radio Frequency IDentification (RFID) tags to them.                                                                          A special RFID reader is used to read the tags.                                                                             RFID is becoming one of the more important types of wireless technology.                                                                                             Each tag has a unique number and allows you to track...
Products                                                                                                                                        Items in a store                                                                                                                           Vehicles                                                                                                                                                  Assets                                                                                                                                             Animals                                                                                                                             Laboratory samples                                                                                                                                              and even patients in a hospital...

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