Engineering in Kenya

Cell Phones in Electronics Engineering

Posted by on Apr 20, 2018 in Electrical Engineering | 0 comments

300x250 animated Cell Phones in Electronics Engineering

Cell Phones in Electronics Engineering are used all over the world for communication. Cell Phones in Electronics Engineering range in sizes from as small as a human thumb to as large as a regular telephone booth if more efficient that way. Modern cell phones can fold, flip, compact and even store just about anything. It’s important that we understand how Cell Phones in Electronics Engineering work. Engineering in Kenya has more articles.

Cell Phones in Electronics Engineering Cell Phones in Electronics Engineering

Cell Phones in Electronics Engineering

How Cell Phones in Electronics Engineering Work

In a sense, Cell Phones in Electronics Engineering are just like radios. Cell phones pick up signals from aerial towers. If you wonder how the cell phone works and what makes it different from a regular household phone, then it’s important that we discuss the basics of any Cell Phones in Electronics Engineering.

All Cell Phones in Electronics Engineering have cellular systems. A cellular system is best defined as a division of a city into small portions termed as cells. Each cell has a base station which consists of an aerial tower and a small building containing the radio equipment that facilitates the cell phones. This allows widespread reuse of frequency across the city in question, so that millions of people can their use cell phones at the same time (concurrently). Each cell is typically sized and covers about 10 miles radius.

There is a need to have a large number of base stations in any city of any size to make Cell Phones in Electronics Engineering function conveniently. A typical large city can have hundreds of aerial towers placed in specific regions to cover most of the areas completely. The central offices called the MTSOs (Mobile Telephone Switching Office) handle all of the cell phone connections to the normal land based cell phone system, and controls all of the base stations in the region. Each carrier in each city runs one.

468x60 002 Cell Phones in Electronics Engineering

All Cell Phones in Electronics Engineering also have special codes related to them. These codes are used to identify the phone, phone’s owner, and the service provider that they employ. Here is what happens when one uses his/ her phone;

468x60 002 Cell Phones in Electronics Engineering

System Operations for Cell Phones in Electronics Engineering

When a person turns on the cell phone, it waits for a System Identification Code (SID) on the control channel. A system identification code for Cell Phones in Electronics Engineering is a unique 5-digit number that is assigned to each carrier. This is a unique frequency that the cell phone and base stations use to send signals to other base stations and cell phones about things like the call set-up and channel changing. If the phone can’t find any control channels to listen to/ wait for, then it is out of range and will display on the cell phone screen a “no service” or “emergency only” message.

When it receives the system identification code, it matches up to the system identification code programmed into the cell phone. If the SIDs match, the phone will then realize that the cell it is corresponding to is part of its home system.

The cell phone also transmits a registration request along with the system identification code, and the MTSO keeps track of one’s phone location in the database; this way it is known what cell one is, and thus easy to connect when it wants to ring your Cell Phones in Electronics Engineering.

The MTSO gets the caller that is calling you and it tries to find your cell phone by looking in its database to see which cell you are in. The call is then sent to you at that time. Modern systems for Cell Phones in Electronics Engineering assign different signals to the caller and the recipient and thus allow talking by two-way radio.

As one travels and moves near the end of a cell, the cell’s base station records that the signal strength is weakening. In the meantime, the base station in the cell you are moving closer to records your phone’s signal strength increasing. The two base stations therefore coordinate with each other through the MTSO, then inform your cell phone and at some point, your phone gets a signal on its control channel telling it to change frequencies. This therefore switches your phone to the new cell without any interruptions to you and your call. As one travels, the signal is passed on from cell to cell. It’s even amazing that all of this happens within seconds for Cell Phones in Electronics Engineering.

Conclusion on Cell Phones in Electronics Engineering

Cell phones may be small devices, but the technology they possess is amazing. Who would have thought of something so small could be so complex and powerful? All of the above information is transparent to the customer, which makes Cell Phones in Electronics Engineering even more enjoyable.

 

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