Concentrator of fixed and mobile telephone services - CFM

• Grant number: 03/13148-4
• Support Opportunities: Research Grants - Innovative Research in Small Business - PIPE
• Start date: April 01, 2004
• End date: August 31, 2007
• Field of knowledge: Engineering - Electrical Engineering - Telecommunications
• Principal Investigator: George Emmanuel Bozinis
• Grantee: George Emmanuel Bozinis
• Company: Innovatech Telecom Indústria e Comércio de Equipamentos Eletrônicos e de Telecomunicações Ltda (Innovatech)
• City: Campinas

Abstract

This project aims at the development, in an innovative way, of a system for integration of the fixed and cell phone networks. Called Concentrator of Fixed and Mobile Telephone Services - CFM, the system consists of a low cost piece of equipment for the individual or corporate end user. The CFM allows the fixed telephone and mobile phone user to access the fixed network from his own cell phone terminal if he is located within the area covered by the CFM, thus enjoying fixed network rates in those conditions. On leaving the area covered by the CFM, the user can access the mobile cell network in the normal way. The user’s terminal camps in the CFM control channel if it is within the CFM catchment area.When the terminal moves away from CFM by means of the GSM reselect control channel, it will camp in the local operator’s mobile system control channel. Thanks to this functionality, no additional development will be necessary at the mobile terminal, facilitating its implementation for the user and for the operating companies. CFM consists of a concentrator device which interconnects with the fixed network and has an aerial interface compatible with the GSM standard. The interconnection with the fixed network can be analogical, with line signal equivalent to that of the fixed line subscriber, allowing a single user to access this network at a particular moment; or digital, with an ADSL modem, allowing the multiplexing of the subscriber line by more than one user simultaneously. (AU)