Wireless and Mobile Communication Networks

Communication without being physically tied-up to wires has always been of interest and mobile and wireless communication networks promise that. The last few years have witnessed unprecedented growth in wireless communication networks. Significant advancements have been made in the technologies that support wireless communication environment and there is much more to come in the future. The devices used for wireless communication require certain features that wired communication devices may not necessarily need. These features include low power consumption, light weight, and worldwide communication ability.

In wireless and mobile communication networks, the access to a communication network is wireless so that the end users remain free to move. The rest of the communication path could be wired, wireless, or combination of the two. In general, a mobile user, while communicating, has a wireless connection with a fixed communication facility and rest of the communication path remains wired. The range of wireless communication is always limited and therefore the range of user mobility is also limited. To overcome this limitation, the cellular communication environment has been devised. In a cellular communication environment, a geographical region is divided into smaller regions called cells, thus the name cellular. Each cell has a fixed communication device that serves all mobile devices within that cell. However, as a mobile device, while in active communication, moves out of one cell and into another cell, service of that connection is transferred from one cell to another. This is called the handoff process. The cellular arrangement has many attractive features. As the cell size is small, the mobile devices do not need very high transmitting power to communicate. This leads to smaller devices that consume less power.

In addition, it is well known that the frequency spectrum that can be used for wireless communication is limited and can therefore support only a small number of wireless communication connections at a time. Dividing communication regions into cells allows the use of the same frequency in different cells as long as they are sufficiently far apart to avoid interference. This increases the number of mobile devices that can be supported. Advances in digital signal processing algorithms and faster electronics have led to very powerful, smaller, elegant, and versatile mobile communication devices. These devices have tremendous mobile communication abilities including wireless Internet access, wireless e-mail and news items, and wireless video (though limited) communication on handheld devices. Wireless telephones are already available and operate in different communication environments across the continents. The day is not far when a single communication number will be assigned to every newborn and will stay with that person irrespective of his/her location.

Another field that is emerging rapidly is the field of ad hoc wireless communication networks. These networks are of a temporary nature and are established for a certain need and for a certain duration. There is no elaborate setup needed to establish these networks. As a few mobile communication devices come in one another’s proximity, they can establish a communication network among themselves. Typical situations where ad hoc wireless networks can be used are in the classroom environment, corporate meetings, conferences,
disaster recovery situations, etc. Once the need for networking is satisfied, the ad hoc networking setup disappears.

How To Successfully Mail A Letter

Mailing a letter does not seem very reasonable in this day and time when there is email, chats, phones and even online support and video calls. But the truth is that there are still very many situations and circumstances when sending a letter is inevitable and actually the most professional way of conveying a given message. Whether you are sending a formal or informal letter, there are things you must remember to ensure that your letter mailing efforts yield good results.

1. Format the letter properly

The format of your letter will always depend on the kind of letter you are sending and to whom you are sending the letter to. For instance, a formal letter may be on a business proposal or response compare to a thank you kind of letter. Ensure you pick up the right format and include all details that need to be included depending on the type of letter it is you are sending. Confirm who you are addressing the letter to and use the right titles and remember to also include your address and name too. If you are not too sure what format is suitable for your letter, you can look up for templates that can make your work quick, easy and on point.

2. Choose the right envelope

When it comes to choosing the envelope to mail the letter in, the type of letter should again guide you. Always choose an envelope that is sturdy enough because the letter might be handled by a number of people before reaching the addressed recipient. Let the weight of the envelope match the weight of the letter paper you have used and any other contents you could be mailing together with the letter. If you chose a heavy cardstock for your letter, then the envelope should be strong enough to accommodate the letter. Still on the envelope, choose a size that matches the size of the letter and how you have decided to fold it; do not choose too large an envelope and neither should you choose one that leaves the letter look squeezed in. The intent of the letter is also a consideration to make when choosing your envelope. Let the envelope remain professional for formal letter, but you can go for decorative and colorful envelopes if you are passing a personal note.

3. Address the envelope appropriately

One of the most common mistakes people make is putting wrong addresses on their letter so they end up not getting delivered as intended. Start by confirming the address of the recipient and then ensure that you properly and clearly place it on the envelope. Include the name of the recipient, house number, street name, city, province and the postal code and use dark ink that is permanent. Make your writings as legible and organized as possible so it is clear enough where the letter is headed. You can also include your return address on the envelope or use a printed return address label so it gets back to you if for any reason it doesn’t find its way to the intended recipient.