Portable terminal equipment

#The present invention relates to a portable terminal equipment such as a portable telephone or the like. In details, the present invention relates to a portable terminal equipment capable of saving power consumption by controlling the interval between each reception of the control channel in a standby state on the basis of receiving state.

#In a simplified type portable telephone-such as PHS (Personal Handyphone System), in the case of out-of-synchronism with a control channel, the synchronism with the control channel is established by receiving the control channel transmitted from a cell station and then a location thereof is registered to the cell station and the telephone shifts to a standby state. In addition, in the standby state, the telephone receives intermittently the control channel and obtains the data such as the arrival of incoming call.

#The cell station, however, transmits the data such as the arrival of incoming call, plural times in consideration of jamming and soon. Therefore, when the control channel is received in a good state, it has no trouble that the interval between each reception of the control channel becomes longer.

#FIG. 1 is a block diagram showing the constitution of a simplified type portable telephone as a best mode of this invention.

#FIG. 2 is a front view showing the simplified type portable telephone (where a key-protecting lid is detached).

#FIG. 3 is a side view showing the simplified type portable telephone.

#FIG. 1 shows a simplified type portable telephone 10 according to an embodiment as the best mode of this invention. The telephone 10 uses a battery as its power source.

#The telephone 10 is provided with a microcomputer 11 for controlling a system, an antenna 12 for the transmission and reception of signal, a wireless unit 13 downconverting a receiving signal at a predetermined frequency caught by the antenna 12 to provide a π/4 shift QPSK (Quadrature Phase Shift Keying) signal and upconverting a π/4 shift QPSK signal outputted from a digital modulating and demodulating unit 14, mentioned later, to provide a transmitting signal at a predetermined frequency, and the digital modulating and demodulating unit 14 demodulating the π/4 shift QPSK signal outputted from the wiring unit 13 to provide the receiving data and modulating the transmitting data outputted from a TDMA (Time Division Multiple Access) processing unit, mentioned later, to provide the π/4 shift QPSK signal.

#The telephone 10 is also provided with the TDMA processing unit 15 for selecting the data of down slots which are previously set, from a receiving data (time division multiplex data in a plurality of slots) outputted from the digital modulating and demodulating unit 14, for separating the data into control data and compressed voice data and for multiplexing the compressed voice data outputted from a voice codec unit, mentioned later, and the control data outputted from the microcomputer 11 to the up slots which are previously set.