Wireless communication technology or the cellular technology or the mobile technology, these are commonly associated with the mobile phones. Generally, the used terms of wireless, mobile and cellular are represent the cellular technology. These are the terms are not similar. The mobile or the wireless is terms of the past. We use the phone and the cellular network more. The cellular technology is known as the cellular because of the mechanism. Te cellular system uses more base stations to divide the service area to the multiple cells. Using the cellular service the user may communicate while the traveling from one into the other area. A cell of the mobile phone functions as the sender and the receiver. The cell accepts and also transfer the small packets of the data via the built in of antenna device into the specific location with the frequency. These specific location called as the channel.
All the mobile operators use the radio spectrum in terms of provider the services. The spectrum is the limited resource. In earlier, the mobile operator service used the division of the frequencies to improve a capacity. However, the cellular tech allowed the division of the geographical areas that is leading in towards the large area coverage. The cellular networks are the combination of the clusters. Te cluster is the group of the seven cells. Every cell has the base station in the centre of it. The base station gives a control on a sending and receiving. All the base stations have connected into the Mobile Switching Office (MSO) that is the central point. The Mobile Switching Office is connected into the Public Switched Telephone Network (PSTN).
The Public Switched Telephone Network is continuously monitor a quality of the communications and call the another PSTN. The cellular device consists of the personal digital assistants, mobile phones, and handheld computers, portable of phone data devices and so on. The Cellular Technology used for the personal and commercial and also military purposes. The different bands of the radio spectrum used. Most of the popular bands such as GSM 900 and GSM 1800. Most of the devices have support the multiple bands and also work in any of the country. The cellular technology uses two ways such as analog and digital. The access types of this cellular networks is
- Code Division Multiple Access
- Time Division Multiple Access
- Frequency Division Multiple Access
To examine a traffic voice and the data users in the particular service area of IBM introduced the Technology Future called as the CDPD (Cellular Digital Packet Data). This is based on the internet protocol and transmission control protocol. The CDPD overlays the packet switching into an existing cellular voice network and also transmits the data packets over an idle capacity. The CDPD cannot need call setup procedures for the switched voice calls. This resolved a problem of the excessive data traffic and also increases a network utilization. The radio basics, signals processing, modulation, frequency bands, interference, range and the access spectrum. These are the important regards to the cellular technology.