Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Reexamination Certificate
1997-04-30
2001-10-16
Chang, Vivian (Department: 2682)
Telecommunications
Transmitter and receiver at same station
Radiotelephone equipment detail
C455S039000, C455S552100, C455S574000
Reexamination Certificate
active
06304761
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a mobile unit communication apparatus having digital and analog communication modes and a method of controlling the same.
2. Description of the Prior Art
A mobile unit communication apparatus having digital and analog communication modes for communicating with a network through a base station in either of digital or analog communication mode is known.
SUMMARY OF THE INVENTION
The aim of the present invention is to provide an improved mobile unit communication apparatus having digital and analog communication modes and an improved method of controlling the same.
According to the present invention, a mobile unit communication apparatus having digital and analog communication modes is provided, which comprises: a radio wave transmission and receiving portion including an antenna for transmitting digital and analog transmission signals in the digital and analog communication modes respectively; a signal processing portion including a digital signal processing (DSP) portion and an application specific integrated circuit (ASIC) portion for processing the received digital and analog transmission signals in the digital and analog communication modes respectively; an input and output portion for inputting an input signal and outputting an output signal from the digital transmission signal from the digital processing portion in the digital communication mode and from the analog transmission signal from the ASIC portion in the analog communication mode, the digital signal processing portion further processing the input signal which is transmitted by the radio wave transmission and receiving portion in the digital communication mode, the ASIC portion further processing the input signal which is transmitted by the radio wave transmission and receiving portion in the analog communication mode; a power supply portion including a battery for supplying a supply power; and a supply power saving portion for operating the ASIC portion and not operating the digital signal processing portion in the analog communication mode to reduce a consumption of the supply power.
This mobile unit communication apparatus may further comprise: a waiting condition detection portion for detecting a waiting condition of reception and transmission of a call, the ASIC portion being responsive to a clock signal; and a clock signal control portion for decreasing a frequency of the clock signal in the analog communication mode when the waiting condition detects the waiting condition.
In that mobile unit communication apparatus, the analog transmission signal may include a forward control channel repeatedly bearing a data stream including top data and recurrent words, each including predetermined data, the mobile unit communication apparatus further comprising: a data detecting portion for detecting data of two successive recurrent words; a comparing portion for comparing detected data of two successive words following the top data from the data detecting portion; and a supply power controlling portion for stopping supplying the supply power to the ASIC portion for a predetermined interval before the next top data when the detected data of the two successive recurrent words agree with each other.
According to the present invention, a method of controlling a mobile unit communication apparatus having digital and analog communication modes is provided, which comprises the steps of: providing a radio wave transmission and receiving portion including an antenna for transmitting digital and analog transmission signals in the digital and analog communication modes respectively; providing a signal processing portion including a digital signal processing (DSP) portion and an application specific integrated circuit (ASIC) portion for processing the received digital and analog transmission signals in the digital and analog communication modes respectively; providing an input and output portion for inputting an input signal and outputting an output signal from the digital transmission signal from the digital processing portion in the digital communication mode and from the analog transmission signal from the ASIC portion in the analog communication mode, the digital signal processing portion further processing the input signal which is transmitted by the radio wave transmission and receiving portion in the digital communication mode, the ASIC portion further processing the input signal which is transmitted by the radio wave transmission and receiving portion in the analog communication mode; providing a power supply portion including a battery for supplying a supply power, the analog transmission signal including a forward control channel repeatedly bearing data stream, each including top data and recurrent words, each including predetermined data; detecting data of two successive the recurrent words; comparing detected data of two successive words following the top data from the data detecting portion; and stopping supplying the supply power to the ASIC portion for a predetermined interval before the next top data when the detected data of the two successive recurrent words agree with each other.
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Appiah Charles N.
Chang Vivian
Matsushita Electric - Industrial Co., Ltd.
Parkhurst & Wendel L.L.P.
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