Mobile Communication Essay
After the transaction, the connection is terminated.In a fixed telephone network, providing and managing connections is an easy process, because telephones are connected by wires to the network and their location is permanent from the networks’ point of view.GSM Roaming, which involves roaming between GSM networks, offers the mobile subscriber the convenience of being able to use a single number, a single bill and a single phone.The convenience of GSM Roaming has been a key driver behind the global success of the GSM Platform.Today, more than 690 mobile networks provide GSM services across 213 countries and GSM represents 82.4% of all global mobile connections.According to GSM World, there are now more than 2 billion GSM mobile phone users worldwide.Roaming allows a mobile subscriber to automatically make and receive voice calls, send and receive data, or access other services when travelling outside the geographical coverage area of their home network, by means of using a visited network.Roaming is technically supported by mobility management, authentication and billing procedures.
To apply this service, the network must has ability to set up and maintain a call, which includes some tasks: identifying the called person, determining the location, routing the call, and ensuring that the connection is continued until conversation lasts.
The GSMA’s GSM Coverage Maps are a unique resource containing information supplied and approved by the members of the Association.
The network, services and roaming information are continually updated to reflect the evolving situation worldwide.
GSM operates at either the 900 MHz or 1800 MHz frequency band.
In Europe, operates in the 900MHz and 1.8GHz bands and in US, operates 1.9GHz and 850MHz bands.