Trends in Cellular Radio and Personal Communications
The concept, called Personal Communication Services (PCS), originated in the United Kingdom when three companies were given spectrum in the 1800 MHz to develop Personal Communication Networks (PCN) throughout Great Britain.PCN was seen by the U.K. as a means of improving its international competitiveness in the wireless field while developing new wireless systems andservices for citizens
What is PCN?
- PCN refers to a wireless networking concept where any user can make or receive calls, no matter where they are, using a light-weight, personalized communicator.
What is PCS?
- PCS refers to new wireless systems that incorporate more network features and are more personalized than existing cellular radio systems, but which do not embody all of the concepts of an ideal PCN.
- An international standards body, IEEE 802.11, is developed standards for wireless access between computers inside buildings.
- The European Telecommunications Standard Institute (ETSI) is also developing the 20 Mbps HIPERLAN standards for indoor wireless networks.
- Before the end of the 20th century products will allow users to link their phone with their computer within an office environment, as well as in a public setting, such as an airport or train station.
- A total of 230 MHz in frequency bands 1885 MHz to 2025 MHz and 2110 MHz to 2200 MHz has been targeted\ by the ITU's 1992 World Administrative Radio Conference (WARC).
- Due to the very large areas on earth which are illuminated by satellite transmitters, satellite based cellular systems will never approach the capacities provided by land-basedmicrocellular systems
- Satellite mobile systems offer tremendous promise for paging, data collection, and emergency communications, as well as for global roaming.
- Fixed cellular telephone systems are being installed at a rapid rate this is due to the fact that developing nations are finding it is quicker and more affordable to install cellular telephone systems for fixed home use, rather than install wires in neighborhoods which have not yet received telephone connections to the PSTN.