Digital radio telephone for a digital mobile radio communication system
A digital radio telephone comprises a radio portion for receiving a radio signal modulated by an encoded digital signal including control information, for demodulating and outputting the encoded digital signal, a control signal processing portion for decoding the demodulated encoded digital signal to obtain the control information, a telephone number information detecting means for detecting whether the decoded control information includes mate telephone number information, a memory for storing the telephone number information, a time information management means for specifying an incoming time of the telephone number information to output a time information, and a memory management means for recording the telephone number information corresponding to the time information into the memory.
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This application is a reissue of U.S. Pat. No. 6,285,872 (corresponding to U.S. Application Ser. No. 09/535,804, filed Mar. 28, 2000, which is a division of U.S. application Ser. No. 08/728,359, filed Oct. 9, 1996, now U.S. Pat. No. 6,075,984. This application is the parent of and is disclosed in reissue U.S. application Ser. Nos. 11/502,579, filed Aug. 11, 2006 and 11/589,954, filed Oct. 31, 2006.
BACKGROUND OF THE INVENTION1. Field of the Invention
The invention relates to a digital radio telephone used in a digital mobile radio communication system such as a land mobile/portable phone system and a PHS (Personal Handyphone System) adopting a digital telephone system for example. The invention particularly relates to a digital radio telephone having a function of storing a mate telephone number (hereinafter, referred to as “incoming telephone number”) and a function of calling the stored phone number (hereinafter, referred to as “incoming redialing function”).
2. Description of the Prior Art
An operation of the incoming redialing function of the analog radio telephone is explained below. First, a radio signal containing control information received via an antenna 6 using a control channel is demodulated by a radio portion 5 and outputted as a control signal which is an analog signal in a base band. Control information in the demodulated control signal is decoded by a decoder 15 and is processed by a microcomputer 10 to establish the radio communication channel. Then, a radio signal containing the telephone number information received via the antenna 6 using the communication channel is demodulated by the radio portion 5 and outputted as the DTMF signal which is the analog signal in 9 base band. The telephone number information in the demodulated DTMF signal is detected, judged, and decoded by a DTMF receiver 16. Then, the output receiver 16 from the DTMF signal is processed by the microcomputer 10 and stored in a memory 12. On the other hand, in case of calling by redialing, the telephone number information stored in advance in the memory 12 by the microcomputer 10 is read out, encoded by an encoder 17, modulated by the radio portion 5, then, transmitted from the antenna 6 as a radio signal.
Since the incoming redialing function in the conventional analog radio telephone constructed as explained above requires the DTMF receiver for detecting the telephone number information in addition to the construction for operating the telephone function itself, there is a problem that the conventional analog radio telephone construction is complicated. Also, since the conventional analog radio telephone redials using the telephone number information stored only in the memory, it is difficult to provide an incoming redialing function having high-performance or multifunction in consideration of user service.
It is an object of the present invention to provide a digital radio telephone having a high-performance incoming redialing function by maximally using the digital processing ability naturally included in a digital radio telephone.
SUMMARY OF THE INVENTIONAccording to one aspect of the invention, a digital radio telephone comprises a radio portion for receiving a radio signal modulated by an encoded digital signal including control information, for demodulating and outputting the encoded digital signal; a control signal processing portion for decoding the demodulated encoded digital signal to obtain the control information; a telephone number information detecting means for detecting whether the decoded control information includes mate telephone number information; a memory for storing the telephone number information; a time information management means for specifying an incoming time of the telephone number information to output a time information; and a memory management means for recording the telephone number information corresponding to the time information into the memory.
According to another aspect of the invention, a digital radio telephone used for an external line and an extension line further comprises an extension/external line judging means for judging whether the telephone number information is from the extension or from the external line; an external line information addition means for adding an external line calling information to the telephone number information according to a judging result to output as new telephone number information.
Preferably, the memory management means in the digital radio telephone records a predetermined number of telephone number information in the memory starting with telephone number information received most recently.
According to further aspect of the invention, a digital radio telephone further comprises an operating portion for supplying an operating signal, and a display portion for displaying various information during operation, wherein, the memory comprises a first memory portion for storing the telephone number information included in the control information and a second memory portion for registering other telephone numbers information inputted from the operating portion corresponding identification information to the telephone numbers; and the operating portion instructs the display portion to display the telephone number information recorded in the first memory portion together with the corresponding identification information recorded in the second memory portion.
According to further aspect of the invention, a digital radio telephone further comprises an operating portion for supplying an operating signal, a display portion for displaying various information during operation, wherein, the memory comprises a first memory portion for storing the telephone number information included in the control information and a second memory portion for registering other telephone numbers information inputted from the operating portion corresponding identification information to the telephone numbers; and the operating portion instructs the display portion to display the telephone number information recorded in the first memory portion together with the corresponding identification information recorded in the second memory portion.
According to further aspect of the invention, a digital radio telephone further comprises an operating portion for supplying an operating signal, a display portion for displaying various information during operation, wherein, the operating portion instructs the display portion to display the telephone number information one after another in a circulative way starting with telephone number information received most recently.
Preferably, the operating portion in the digital radio telephone instructs to make a calling process according to the telephone number information when predetermined telephone number information recorded in the memory is displayed on the display portion.
Preferably, the memory in the digital radio telephone comprises a first memory portion for storing the telephone number information included in the control information and a second memory portion for registering other telephone numbers information inputted from the operating portion corresponding identification information to the telephone numbers; and the operating portion instructs the second memory portion to register the predetermined telephone number information when the predetermined telephone number information recorded in the first memory portion is displayed on the display portion.
The present invention is concretely explained focusing on a digital radio telephone compatible to both a private (extension) line and a public (external) line.
First, in a step 401, the telephone number information detecting means 40 detects whether the telephone number information is included in the control information from the control signal processing portion 9. The process is completed in case the telephone number information is not included In case telephone number information is included, the extension/external line judging means 70 identifies and judges whether the telephone is in the extension or in the external line in a next step 402. In case the call is in the external line, in a next step 403, the external line information addition means 80 adds external line identifying information (“0” as the external line calling number, for example) to the telephone number information in the control information. In case the call is in the extension, the external line information addition means 80 extracts the telephone number information from the control information and outputs the telephone number information. Then, in a step 404, the time information management means 50 specifies the time when the telephone number information is received. In a next step 405, the operating portion 11 instructs the telephone number information comparison means 67 how to process incoming telephone numbers received. In the case where all incoming telephone numbers are to be recorded, the operation goes to step 406. In the case of where only the latest received incoming telephone number previously recorded is to be maintained in memory, the operation goes to a step 410. In the step 410, the telephone number information comparison means 67 compares the recorded incoming telephone number information recorded in an incoming recording memory portion 121 of memory 12 with the latest incoming telephone number information. In the case where the incoming telephone number does not correspond to the registered telephone number information, the operation goes to the step 406. On the other hand, in the case where the incoming telephone number is identical to a telephone number already recorded in the registered telephone number information, the operation goes to step 411. In the step 411, the recording means 63 deletes the old telephone number information from the incoming recording memory 121 which matches the latest incoming telephone number, and goes to step 408. In the step 406, the vacant memory judging means 61 judges whether there is an area for new incoming telephone number information to be recorded in the incoming recording memory 121. In the case where the incoming recording memory 121 has a vacant storage area, the incoming telephone number information is recorded in the incoming recording memory 121 together with the time information. In the case where the incoming recording memory 121 is fully occupied, the operation goes to a next step 407, where the telephone number information with the oldest time information is deleted from the incoming recording memory 121. In the next step 408, the second oldest telephone number information is incremented and recorded into the location in the incoming recording memory 121 where the oldest time information is deleted. This operation is repeated continuously. In a next step 409, the latest incoming telephone number information is finally recorded together with the time information into a location in the vacant incoming recording memory 121, and the operation is then completed.
Claims
1. A digital radio telephone comprising:
- a radio portion for receiving a radio signal modulated by an encoded digital signal including control information, for demodulating and outputting said encoded digital signal;
- a control signal processing portion for decoding said demodulated encoded digital signal to obtain said control information;
- a telephone number information detecting means for detecting, before a speech path is established with an incoming call apparatus, whether the decoded control information includes incoming telephone number information;
- a memory for storing said telephone number information, said memory having an incoming recording memory and a registering memory, with said incoming recording memory storing a telephone number and a time information of an incoming telephone call;
- a time information management means responsive to said telephone number information detecting means for specifying an incoming time of said telephone number information to output said time information; and
- a memory management means for recording said telephone number information corresponding to said time information into said memory, with said telephone number being compared to previously stored telephone numbers, and being stored in a first memory location if said telephone number is not in said incoming recording memory, and being deleted from an existing memory location and being stored in a first memory location if said telephone number is currently in said incoming recording memory.
2. The digital radio telephone of claim 1, further comprising:
- an identification information memory for storing identification information corresponding to said telephone number information stored in the memory.
3. A digital radio telephone, comprising:
- a radio device configure to receive a radio signal modulated by an encoded digital signal including control information, to demodulate and to output said encoded digital signal;
- a control signal processor configured to decode said demodulated encoded digital signal to obtain said control information;
- a telephone number information detector configured to detect, before a speech path is established with an incoming call apparatus, an incoming telephone number information included in said control information;
- a memory configured to store said incoming telephone number information, said memory having an incoming recording memory and a registering memory, with said incoming recording memory configured to store a telephone number and a time information of an incoming telephone call, and with said registering memory configured to store a telephone number and additional information related to said telephone number;
- a time information management device configured to specify an incoming time of said incoming telephone number information to output said time information responsive to said telephone number information detector; and
- a memory management device configured to record said incoming telephone number information corresponding to said time information into said memory, wherein
- said memory management device, in the case where said incoming recording memory is fully occupied, is configured to delete an old incoming telephone number from said incoming recording memory and to record a new incoming telephone number information into said incoming recording memory together with said time information, and
- said memory management device, in the case where said incoming recording memory has a vacant storage area, is configured to record said new incoming telephone number information into said incoming recording memory together with said time information.
4. The digital radio telephone according to claim 3, wherein
- said memory management device, in a case where a telephone number information corresponding to said incoming telephone number information is not registered in said registering memory, is configured to display said incoming telephone number information and said time information, and
- said memory management device, in a case where said telephone number information corresponding to said incoming telephone number information was previously registered in said registering memory, is configured to display said incoming telephone number information, said time information and additional information registered in said registering memory.
5. The digital radio telephone according to claim 4, wherein said memory management device, in response to a redialing instruction, is configured to transmit said incoming telephone number information as control information to make a telephone call.
6. The digital radio telephone according to claim 4, wherein said memory management device, in response to a registering instruction, is configured to record said incoming telephone number information into said registering memory.
7. A digital radio telephone, comprising:
- a radio device configured to receive a radio signal modulated by an encoded digital signal including control information, to demodulate the radio signal, and to output said encoded digital signal;
- a control signal processor configured to decode the demodulated encoded digital signal to obtain said control information;
- a telephone number information detector configured to detect, before a speech path is established with an incoming call apparatus, an incoming telephone number information included in said control information;
- a time information management device configured to specify an incoming time of said incoming telephone number information to output a time information, responsive to said telephone number information detector; and
- a memory having an incoming recording memory and a registering memory, said incoming recording memory configured to store the incoming telephone number format and said time information of an incoming telephone call; and
- a memory management device configured to record said incoming telephone number information corresponding to said time information into said incoming recording memory, and to display said incoming telephone number information and said time information on a display.
8. An incoming telephone number information recording method, comprising:
- receiving a radio signal including control information;
- demodulating and decoding the received radio signal to obtain the control information;
- detecting, before a speech path is established with an incoming call apparatus, an incoming telephone number information included in said control signal;
- specifying, responsive to said telephone number information detecting step, an incoming time when said radio signal including said incoming telephone number information is received, and said time information management step; and
- recording every incoming telephone number information and corresponding incoming time information, including performing one of
- recording said incoming telephone number information and said incoming time information corresponding to said incoming telephone number information directly into a memory in the case where said memory has a vacant storage area, and
- recording said incoming telephone number information and said incoming time information corresponding to said incoming telephone number information into said memory after deleting an old incoming telephone number information from said memory in the case where said memory is fully occupied.
9. A digital radio telephone, comprising:
- a radio device configured to receive a radio signal modulated by an encoded digital signal including control information, to demodulate the radio signal to obtain the encoded digital signal, and to output said encoded digital signal;
- a control signal processor configured to decode said demodulated encoded digital signal to obtain said control information;
- a telephone number information detector configured to detect, before a speech path is established, whether the decoded control information includes incoming telephone number information;
- a time information management device configured to specify an incoming time of said telephone number information to output said time information, responsive to said telephone number information detector; and
- a memory having an incoming recording memory configured to store a plurality of incoming telephone number information detected by said telephone number information detector and time information of a plurality of incoming time specified by said time information management device, and a registering memory configured to store a pre-registered telephone number and a corresponding identifier; and
- a memory management device configured to store said incoming telephone number information corresponding to said time information into said memory.
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Type: Grant
Filed: Sep 3, 2003
Date of Patent: Jul 1, 2008
Assignee: Mitsubishi Denki Kabushiki Kaisha (Tokyo)
Inventor: Takashi Murata (Tokyo)
Primary Examiner: T. M. Argenbright
Attorney: Oblon, Spivak, McClelland, Maier & Neustadt, P.C.
Application Number: 10/653,747
International Classification: H04Q 7/32 (20060101);