Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Reexamination Certificate
1998-12-15
2001-10-09
Kincaid, Lester G. (Department: 2682)
Telecommunications
Transmitter and receiver at same station
Radiotelephone equipment detail
C455S466000, C455S553100, C375S216000
Reexamination Certificate
active
06301488
ABSTRACT:
FIELD OF THE INVENTION
Telephone networks are being used more and more to transmit data because they offer great ease of access. In order to attach a data transmission device, such as a personal computer (PC), to a telephone network, it is connected via a connection adaptor to a telephone link. This adaptor comprises a modem which ensures conversion of the signals transmitted by the PC, so that they are of the desired level and of the type of modulation for transmission via the network, and ensures the reverse conversion for received signals. Since the telephone link generally permits only a single communication, a two-channel switching device makes it possible to select an associated telephone receiver or the modem.
BACKGROUND OF THE INVENTION
In order to establish a communication, the calling PC controls, via the adaptor, the switching of the switching device to its channel and transmits telephone dialling commands, these commands coming from the keyboard of the PC or being produced by software in the PC. Then, the telephone communication being established, the exchange of data takes place via the adaptor which also may ensure a logic adaptation, ie. may carry out a protocol conversion between the input/output signals of the PC and those transmitted via the network.
The problem addressed by the Applicant and which must in no way limit the scope of this application, related to the GSM telephone network and it was a GSM telephone terminal which was in charge of switching towards an adaptor with a GSM modem for connection of a PC having a communication function.
An adaptor of this type, however, is very expensive.
The present invention aims to reduce this difficulty.
SUMMARY OF THE INVENTION
To this end, the invention relates to a radio-telephone terminal comprising connection means to connect, to a digital radio-telephone network, a telephone handset, data adaptation means arranged to be connected to a data transmission device and a central unit for management of vocal telephone communications and communications of the said data, characterised in that the central unit is arranged in order, in a time-sharing manner, to manage the said vocal telephone communications and to proceed with the said adaptation of the digital data.
The addition of relative functions to the data seems, a priori, to be economically irrational. Indeed it consists of adding functions of data transmission and adaptation to the terminal of which the basic function is telephony, without knowing whether the cost excess which this will cause will be compensated for in effective usage. In other words, the approach appearing to be rational and which had previously been followed, was to implant an adaptation card in the data transmission device. One of the merits of the Applicant is thus having thought of a radio terminal economically and, ultimately, offering a service of direct connection to the network. In fact, the adaptation function, being integrated into the central unit, requires no specific unit because it uses all or part of the central unit in a time-sharing manner. To sum up, the in-depth examination of the solution which is, a priori, irrational has shown the Applicant that this line of research in fact led to the best economic solution.
In a very advantageous manner, the central unit is arranged to manage the data, and the data transmission means are integrated into the terminal.
This terminal can thus possess all the functions required to deal with useful applications, ie. on the one hand, to establish a data transmission link with a remote computer terminal or server and, on the other hand, to then exchange therewith and to interpret data relating to the application in question. To sum up, in this case the terminal incorporates the functions of a computer terminal.
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Alos Raphaël
Dimech Jean-Marc
Porato Marc
Sykes Francis
Akerman & Senterfitt
Kincaid Lester G.
Sagem SA
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