Communications technologies used in mobile devices

Pass 1: For each term explain what it is, how it works, a device which uses it
Transmission Technology

Infrared: Electromagnetic waves which connect with each other invisibly, for example remote controls. Small range and data transfer rates.
Bluetooth: Wireless technology where you can exchange data for example sending a song from one blackberry to another blackberry. Slow data transfer rates.
Wireless Fidelity (WiFi): Connects you to an internet modem or broadband, allowing you to access the internet for example a laptop. Quick transfer rates and high effective range.
GSM: This stands for Global System for Mobile communications which is a digital signal and is used in most 2G mobile phones for example Nokia 6700.
GPRS: This stands for a general pocket radio service which is used for data signal and uses high ranges and transfer rates for example the Sony Ericsson W995.
2.5G: This provides a slow wireless technology and capacity service the first iphone uses 2.5G.
3G: This provides a quick wireless technology with high range and capacity service and mainly used to connect to the internet. The iphone 3G uses 3G.
4G: This is the fourth generation which is an improved 3rd generation (3G) it has extremely fast wireless internet and transfer data. HTC desire 4G uses this.
Standards and protocols:
802.11 for WiFi: This is commonly used in RM laptops and is a type of WiFi for speed and connectivity which is between wireless stations.
IrDA for Infrared: This is used in Wii Remotes and is an abbreviation for infrared data association and is creates devices that use infrared electronics.
Wireless access protocols: This is commonly used with laptops for example, it connects to servers to access internet and allow information services to pass through.
SMS protocols: This is used for all mobile phones, and stands for short message service which delivers messages through the internet sending over signals like GSM.



Wireless Networking:
Hotspots: A hotspot is an area where you can access wireless internet or broadband for example on mobile phones and laptops. If you’re in a hotspot area you can freely gain access and connect.
Wireless network adaptors: Wireless network adaptors are USBs which allow you to access internet anywhere without having to find a hot spot. Companies such as O2 and Orange sell these where you can pay monthly.
Merit 1 Describe each protection measure, say which devices use it and how successful it is

Protection
Wireless encryption methods:
WEP: This stands for Wired Equivalent Privacy and is a type of safety method for example, you create your own unique password which will allow you to connect to a broadband modem. This will prevent unknown users trying to access your internet services which you have paid for. If you don’t have a WEP then any unknown user can connect to your broadband without paying.
WPA: This stands for Wi-Fi protected access and is an upgrade from a WEP. It works by having to authorise a network for example newer modem connections need further WPA codes when connecting to a device so instead of just having a password to need advanced information.
AES: This stands for Advanced Encryption Standards. This enables certain beta parts of information allowing many codes to encrypt someone’s safey is authorised and secure for access and editing files within the system.
EAP: This transports protocols, by using its own starting and ending of message however it is still allowing third parties to carry clients and access control for wireless access points.
Interference from other devices: Other devices may interfere with your device this can cause interruptions, and fuzziness to connections. However this can be stopped by changing your AES codes and information on the modems, also this can be stopped by moving away from other wireless devices.

Computer Operator

Computer Operators control and monitor the processing of work through large, mainframe computers. They often work shifts, including nights.

Usually, organizations that have to process a large volume of information use mainframe computers, for example, banks and the police.

If a fault occurs, operators have to find the problem and either fix it or call in someone from the supplier of the computer equipment.

Older computer systems need the operator to type in commands at several stages.

For this job these are the general characteristics you need:

·       Have good communication skills to explain problems clearly.

·       Be patient and able to pay good attention to detail, when making routine checks on the system.

·       Keep accurate written records.

These qualities are particularly important if you want to be a computer operator

  

·       Have an analytical mind and good problem-solving skills.

·       Keep information secure and confidential.

·       You will also need to be able to:

·       Work logically and methodically, and follow set procedures.

·       Think quickly and cope well with pressure.

·       Use your initiative.

·       Work both on your own and in a team.

I believe for this job these skills are the most important;

You need to have a good communication and problem-solving skills, I.T skills, to be patient and methodical, and to be able to pay good attention to detail.

Also for this job, it’s essential to be responsible for controlling or adjusting equipment, and also to be good at using a computer.  However you do not to be good at planning how much work is being carried out, or understanding how machinery or equipment works and you won’t be using the telephone or two way radio.

For this job it’s important to be able to explain your ideas and information to people. To be accurate and good at paying attention to details also to be good at following set procedures. Solving problems is important and keeping accurate records or reports is needed. Teamwork is used a lot when building ideas. Although it’s likely that you will be working evenings and weekends.