JP2001298530A - Communication system, communication method and receiving device - Google Patents

Abstract

(57) [Summary] [Problem] A communication system capable of performing filtering even for a caller whose number is not notified in a communication terminal on the receiving side, regardless of whether the caller notifies the number or not. A communication method and a receiving device are provided. SOLUTION: In a communication terminal 140 called by a user 1 as a caller, a request for a password is issued to the caller, and the collation result between the password transmitted from the caller and the password held by the user 2 is obtained. , It is determined whether or not to respond to the call of the caller. As a result, communication can be performed only with the party sharing the predetermined PIN, and calls from a source that does not have the PIN can be eliminated, and the user can use the communication terminal comfortably. .

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention can be applied to a telephone, a mobile telephone or an information communication terminal having a data communication function. The present invention relates to a communication system capable of controlling the communication of the present invention, a communication method thereof, and a receiving apparatus.

[0002]

2. Description of the Related Art FIG. 13 shows a communication procedure in a conventional radio communication system such as a portable telephone. Here, user 1 (10) calls user 2 (50),
This shows a communication procedure when communication is performed between the two. As shown, first, a communication request 101 is transmitted from the user 1. The communication request 101 is transmitted via the network 20 to a base station (BS: Base Station) 30 covering a service area where the user 2 is located, and when the base station 30 receives the communication request 101, a call channel A paging signal (Paging) 102 is transmitted to the user 2 via (PCH).

A paging signal 102 transmitted by the base station 30 is transmitted to a communication terminal (MS: Mobile) of the user 2.
eStation, also called a mobile station, a mobile phone being one example). The communication terminal 40 that has received the call signal 102 responds to the response channel (RAC
The response signal Ack103 is returned to the base station 30 via H). The base station 30 transmits a physical channel allocation notice signal 104 to the communication terminal 40. Communication terminal 4
0 receives the notice signal 104 and transmits a response signal 105 to the base station 30. Then, the physical channel assignment signal 106 is transmitted by the base station 30. Thereby, a physical channel for performing information communication between the base station 30 and the communication terminal 40 is established, and the user 1 and the user 2 are in a communicable state.

In this state, the communication terminal 40 generates an incoming call notification 109 that informs the user 2 of a communicable state by ringing a bell, generating a vibration (vibration), or the like. The user 2 receiving the incoming call notification 109 starts a call with the user 1 by a predetermined operation, for example, by pressing a call button on the communication terminal 40.

[0005] As shown in FIG. 13, the authentication in the communication terminal 40 depends on the communication system, but is usually performed by the authentication procedure of pattern 1 or pattern 2. At this time,
The process of source confirmation (source filtering) performed in the conventional communication terminal is performed before the communication terminal 40 generates the incoming notification 109 to the user 2. FIG. 14 shows the procedure of this source filtering. As shown in the figure, the communication terminal 40 first performs a source number collation 201 to determine whether the source is OK or NG. This judgment is made, for example, by comparing the caller number list registered in advance in the communication terminal 40 by the user 2 with the caller number currently requested for communication, and judging OK or NG according to the result. I do. For example, the user 2 registers in advance the number of the other party with whom the user can communicate in the OK group, and registers the number of the other party with whom he does not want to communicate with the NG group. When performing the filtering, the communication terminal 40 compares whether the number of the caller currently requesting the communication matches any of the numbers registered in the OK group, and compares the number registered in the OK group. If it matches, it is determined that the communication may be performed (OK), and the user 2 is notified of the incoming call. On the other hand, if the number of the caller currently requesting communication matches any of the numbers registered in the NG group, it is determined that the user 2 does not need to communicate with the other party (NG), and the communication is performed. Blocking or notifying the user 2 of the incoming call by a notification means different from the normal incoming call notification specified by the user 2, for example, sounding a specified incoming melody, and determining whether the user 2 will accept the call. Offer the opportunity.

[0006]

In the above-described conventional source filtering system, the source is characterized by the number of the source that transmitted the communication request. For this reason, when the caller does not notify the number, there is a disadvantage in that the communication request is processed uniformly, so that it is not possible to perform filtering on the caller who does not notify the number.

[0007] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a communication terminal on the receiving side with which a number non-notification source can be transmitted, regardless of whether the source notifies the number. You can also filter for
The receiving side can receive only the necessary source, and furthermore, when the user obtains information from the information providing device holding the information on the receiving side, the communication terminal on the receiving side can manage the provision of the information. A communication system, a communication method, and a receiving device are provided.

[0008]

To achieve the above object, a communication system according to the present invention is a communication system in which a first user and a second user transmit information via a communication path. Receiving a communication request transmitted from the first user to the second user, requesting the first user to transmit a password, and in response to the request, transmitting the password to the first user. Source identification means for comparing the password transmitted from the user with the password held by the second user and notifying the second user of an incoming call according to the result of the comparison. .

In the communication system according to the present invention, preferably, the transmission source confirming means includes a password transmitted from the first user and a password held by the second user. If the result of the comparison is that the password transmitted from the first user matches the password held by the second user, the second
An incoming call notifying means for notifying the user of the incoming call; and, as a result of the comparison, communication when the password transmitted from the first user does not match the password held by the second user. Communication blocking means for blocking communication.

In the communication system according to the present invention, preferably, as a result of the comparison, the password transmitted from the first user matches the password held by the second user. In this case, an incoming call notifying means for notifying the second user of an incoming call, and a password transmitted from the first user and a password held by the second user as a result of the comparison. And a retransmission requesting unit for requesting the first user to retransmit the personal identification number when the passwords do not match.

In the communication system according to the present invention, preferably, the retransmission request means has a counter for counting the number of times of the retransmission request, and the communication cutoff means has a preset value of the counter. When the upper limit is reached, the communication is cut off.

A communication method according to the present invention is a communication method in which a first user and a second user transmit information via a communication path, wherein the first user and the second user transmit the information from the second user to the second user. Requesting the first user to transmit a password when receiving the communication request transmitted to the user, and transmitting the communication request from the first user in response to the password transmission request. Comparing the personal identification number with the personal identification number held by the second user, and determining whether to notify the second user of an incoming call according to the comparison result. Have.

Further, the communication system according to the present invention includes an information providing means for providing predetermined information to a user, and an information providing means, when the first user requests the information providing means to acquire information. The information acquisition request is transferred to the second user, the first user is requested for a password in response to the acquisition request, and the password transmitted from the first user in response to the request. And a password collating means for comparing the password with a password possessed by the second user, and information to the information providing means according to the comparison result of the password collating means. Information providing control means for instructing whether or not to provide the information.

In the communication system according to the present invention, preferably, the information provision control means compares the password transmitted from the first user with the password as a result of the password comparison by the password collating means. When the password coincides with the password held by the second user, the information providing means is instructed to provide information to the first user, and as a result of the password comparison, the first user is instructed. If the transmitted password does not match the password held by the second user,
The information providing means is instructed not to provide information to the first user.

In the communication system according to the present invention, preferably, as a result of the password comparison by the password collating means,
If the password transmitted from the first user does not match the password held by the second user, retransmission request means for requesting the first user to retransmit the password is provided. Have.

In the communication system according to the present invention, preferably, the retransmission request unit has a counter for counting the number of retransmission requests, and the information provision control unit determines that the number of transmissions of the retransmission request is predetermined. When the set upper limit number has been reached, the information providing means is instructed not to provide information to the first user.

The communication method according to the present invention is a communication method in a communication system having information providing means for providing predetermined information to a user via a communication path, wherein the first user is provided with the information providing means. Transferring the information acquisition request to the second user by the information providing means when requesting the information acquisition to the second user; and providing the first user with a personal identification number in response to the transferred information acquisition request. Requesting the personal identification number; comparing the personal identification number transmitted from the first user in response to the request for the personal identification number with the personal identification number held by the second user; Instructing the information providing means to provide information to the first user in accordance with the result of the comparison.

Further, when receiving a communication request from the first user, the receiving apparatus of the present invention requests the first user to transmit a password, and in response to the request, transmits the first user. A source identification unit that compares the personal identification number transmitted from the user with the personal identification number held by the second user and notifies the second user of an incoming call according to the comparison result.

In the receiving apparatus of the present invention, preferably,
The source confirming means compares a password transmitted from the first user with a password held by the second user, and a result of the password comparison, When the password transmitted from the first user matches the password held by the second user,
Incoming call notifying means for notifying the second user of an incoming call, and, as a result of the password comparison, the password transmitted from the first user and the password held by the second user. And a communication cutoff means for cutting off communication when they do not match.

In the receiving apparatus of the present invention, preferably,
As a result of the password comparison, when the password transmitted from the first user does not match the password held by the second user, the password is retransmitted to the first user. Is required.

In the receiving apparatus of the present invention, preferably,
There is a counter for counting the number of times the password retransmission is requested, and the communication cutoff means cuts off communication when the count value of the counter reaches a preset upper limit.

Further, the receiving apparatus of the present invention preferably has storage means for storing a password held by the second user, and the password collating means preferably stores the password.
Then, the personal identification number transmitted from the user is compared with the personal identification number stored in the storage means.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment FIG. 1 is a circuit diagram showing a first embodiment of the communication system according to the present invention. As illustrated, the communication system according to the present embodiment includes communication terminals 110 and 140 owned by user 1 (100) and user 2 (150), a base station 130 serving a service area where user 2 is located, and It is configured by a network 120 for transmitting information between the communication terminal 110 and the base station 130.

The communication terminals 110 and 140 are telephones,
Any of a mobile phone, etc., and a network 12
0 is configured by a wired or wireless communication network depending on the form of the communication terminal 110. When performing communication between the user 1 and the user 2, the communication terminal 110
Information transmitted between the communication terminal 140 and the communication terminal 140 is transmitted to each other via a wireless transmission path between the network 120 and the base station 130 and the communication terminal 140.

Here, in the communication system described above,
The operation of the entire communication system until the user 2 is called by the user 1 and the communication state between the user 1 and the user 2 is established will be described. That is, in this example,
The communication terminal 110 owned by the user 1 is a transmitting device, and the communication terminal 140 owned by the user 2 is a receiving device. Is configured. Communication terminal 110 owned by user 1
Is a wireless terminal such as a telephone performing wired communication or a mobile telephone performing wireless communication, and it is assumed that the communication terminal 140 owned by the wireless user 2 is a mobile telephone performing wireless communication.

FIG. 2 is a diagram showing a communication procedure in the communication system of the present embodiment. Hereinafter, the operation of information communication in the communication system of the present embodiment will be described with reference to FIGS. In FIG. 2, the communication terminal 110 owned by the user 1 is omitted for simplicity, and the communication request 301 is shown as being transmitted directly from the user 1. The communication request 301 is transmitted by performing an operation on the communication terminal 110 held by the user, for example, by inputting a telephone number of a communication partner to be called.

Communication request 301 transmitted from user 1
Is transmitted via the network 120 to the base station 130 managing the service area where the user 2 is located.
The base station 130 receives the communication request 301 and sends a paging signal (Paging) 302 to a paging channel (P
CH).

When receiving the call signal 302, the communication terminal 140 sends a response signal (Ack) 30 to the base station 130.
3 is returned via the response signal channel (RACH).
The base station 130 that has received the response signal 303 from the communication terminal 140 transmits a physical channel assignment announcement signal 304 to the communication terminal 140. Communication terminal 140 receives this notice signal 304 and transmits response signal 305 to base station 130. Then, the physical channel assignment signal 306 is transmitted by the base station 130. As a result, a physical channel for performing information communication between the base station 130 and the communication terminal 140 is established, and the communication system enters a communicable state (communication state 309).

In the communication terminal 140, an authentication operation including confirmation of a communication partner is performed by performing pattern authentication until the communication state described above is established. For example, when the call signal 302 is received from the base station 130, first, authentication based on pattern 1 is performed (3
07), a response signal 303 is transmitted to the base station 130 according to the result of the authentication. Then, when receiving the physical channel allocation notice signal 304 from the base station 130, authentication based on pattern 2 is performed (308), and a response signal 305 is transmitted to the base station 130 according to the result of the authentication.

By the two authentications 307 and 308 described above, the communication terminal 140 can call its own communication partner,
It is possible to recognize that the user is the communication terminal 110 owned by the user 1, and it is also possible to acquire important information for performing communication, such as the communication state and communication performance of the other party to communicate with. The information communication between the user 1 and the user 2 actually performed after the communication path is established between the communication terminals 110 and 140 is performed based on the information.

The authentication work performed by the communication terminal 140 is a work for recognizing each other between the communication terminal 140 and the calling communication terminal 110 and confirming the characteristics such as mutual communication performance. Yes, automatically performed by the communication terminal before the communication path is established,
And the user 2 hardly recognizes these operations.

In this embodiment, the called side, that is,
In the above example, the communication system is provided with a function of performing so-called source filtering, in which the user 2 arbitrarily selects the calling side for his / her own convenience and controls whether or not to accept the call depending on the situation. In order to realize this, a password common to the user 2 and the user 1 is set, and in addition to the above-described authentication work between the communication terminals, a password between the user 2 and the user 1 is set. The user 2 can determine whether or not to respond to the call from the user 1 according to the result of the confirmation. Similarly, when the user 2 is called from the user 2, the user 2 transmits a common password to the user 1 in response to the request for the password of the user 1, and the user 1 receives the password from the user 2. After making the determination, it is determined whether or not to accept the call from the user 2.

Hereinafter, the source filtering procedure performed on the user 2 side when the user 1 calls the user 2 will be described in more detail with reference to FIG. A communication state between the communication terminal 140 and the user 1 (correctly, the communication terminal 110 owned by the user 1) by exchanging information such as a call and a response between the base station 130 and the communication terminal 140 described above. 309 are established. In this state, the communication terminal 140 requests the personal identification number from the user 1 (310). In response to this request, the communication terminal 110 possessed by the user 1 prompts the user 1 to enter a personal identification number by some method. For example, a beep sounds or a message such as a password input is displayed on the display panel. Note that the user 1 can register the personal identification number in the communication terminal 110 in advance and automatically transmit the registered personal identification number when receiving a request for inputting the personal identification number from the calling party.

When the user 1 inputs a personal identification number to the communication terminal 110 by a key input method or the like, the communication end pressure 110 transmits this personal identification number to the base station 13 via the network 120.
0 to the communication terminal 140 via the base station 130. The communication terminal 140 collates the received personal identification number with a pre-registered personal identification number, and determines whether or not both match. When the received personal identification number matches the previously registered personal identification number, communication terminal 140 notifies user 2 of the incoming call by a method such as an incoming call veil or vibration. If the received personal identification number and the pre-registered personal identification number do not match, the communication is cut off or a ringtone of a melody set in advance by the user 2 is sounded to notify the user 2 of an incoming call.

That is, the filtering in the communication system of the present embodiment can be realized by the called communication terminal requesting the personal identification number from the calling side and judging the personal identification number transmitted by the calling side in response to the request. User 1
And User 2 have a predetermined common password,
When performing communication, the caller transmits a password in response to a request for transmission of a password from a communication partner, and the communication partner can determine whether or not to respond to the communication request of the caller based on the password. By confirming the personal identification number between users before performing communication in this way, it is possible to enhance the protection of privacy and the security of users who use communication terminals, especially mobile communication terminals such as mobile phones and car phones.

Hereinafter, a circuit configuration for implementing filtering of a communication terminal in the communication system of the present embodiment will be described with reference to a circuit example. FIG. 3 is a block diagram showing a configuration of a partial circuit provided in a communication terminal for implementing filtering. As shown, this partial circuit includes a filtering circuit 200, a source number extracting circuit 203, a comparing circuit 206, a selector 207, a multiplexer (MUX) 212, and a communication module 220. Further, the communication module 220
Control circuit 222, memory 223, interface 22
5 and an incoming call notification circuit 228. Note that FIG. 3 omits parts such as a receiving circuit, a transmitting circuit, an encoding circuit for encoding an audio signal, and a decoding circuit for decoding a received code sequence to reproduce an audio signal in the communication terminal. .

The filtering circuit 200 includes the selector 2
07 is compared with the password stored in the memory 223 of the communication module 220 and transmitted to the control circuit 222 in accordance with the result of the comparison. Output a signal. Further, according to the result of the comparison, a password transmission request signal for transmitting a password to the caller is transmitted via signal line 210,
Output to the multiplexer 212,
Multiplexes the data stream to be transmitted, and outputs the obtained transmission data to the transmission circuit. The detailed configuration and operation of the filtering circuit 200 will be described later.

The source number extracting circuit 203 is connected to the signal line 20
Only information relating to the number of the caller is extracted from the received data input via the communication line 2, and the extracted information is supplied to the comparison circuit 205 via the signal line 204.

The comparison circuit 205 includes a source number extraction circuit 2
03 is compared with the source number stored in the memory 223, and a control signal for interrupting communication or performing incoming communication is generated according to the comparison result. , Communication module 220
Is supplied to the control circuit 222.

The selector 207 selects the destination of the received data input from the signal line 201 and the control signal from the comparison circuit 205. For example, the selector 207 selects a password number portion in the received data input via the signal line 201 and supplies the same to the filtering 200. In addition, the selector 207 sends a control signal generated according to the comparison result of the source number from the comparison circuit 205, for example, a control signal for interrupting communication or a control signal for notifying the incoming call to the control circuit 222 of the communication module 220. Supply.

The communication module 220 cuts off the communication or notifies the user of the incoming call by the incoming call notifying circuit 228 according to the control signal from the filtering circuit 200 and the control signal from the selector 207. In addition, the communication module 220 registers so-called information that stores data input by a user in the memory 224 via the interface 225. For example, in the case of number registration, the number of the other party responding to the call is input by the user via the interface 225, and the input number is registered in the memory 223 under the control of the control circuit 222. Conversely, the user can register in the memory 223 the number of the other party who does not want to respond to the call. In this case, for example, the registered number is compared with the caller number by the comparison circuit 205, and if they match, it is determined that there is no need to respond to the call from the communication partner, and the communication is cut off or set in advance by the user. Notify that there is a call from the other party you do not want to respond to due to notification method 2. Similarly, in the case of password registration, a password determined in advance by the user as a communication partner is input via the interface 225 and registered in the memory 223 under the control of the control circuit 222.

In the communication module 220, the control circuit 2
22 controls the registration of the communication partner's number and personal identification number and other information as described above, or controls the communication cutoff in accordance with the control signal input from the filtering circuit 200 and the selector 207, or An incoming notification signal is output to the incoming notification circuit 208 to notify the user of an incoming call.

The memory 223 stores the communication partner's number and personal identification number, and further stores other information necessary for communication, for example, information such as an incoming call notification method by the incoming call notification circuit 208 and an incoming melody. Under the control of the circuit 222, the storage information is output to the circuit when necessary.
For example, in the comparison circuit 205, the source number extraction circuit 2
When a comparison is made between the source number extracted in step S03 and the registration number, the number of the communication partner stored in the memory 223 via the signal line 214 is output to the comparison circuit 205 under the control of the control circuit 222. Is done. When a plurality of numbers are registered by the user, these numbers are sequentially output to the comparison circuit 205. Further, when the filtering of the transmission source is performed by the filtering circuit 200, the password stored in the memory 223 is output to the comparison circuit 205 via the signal 215 under the control of the control circuit 222. Here, for example, when a plurality of personal identification numbers are registered by the user, when the filtering circuit 200 performs filtering of the transmission source, the registered plural personal identification numbers are sequentially output to the filtering circuit 200.

The interface 225 registers necessary information in the memory 223 in accordance with an instruction from the user in an input method such as key input or voice input. Conversely, it outputs information stored in the memory to the outside according to an instruction from the user.

In response to a control signal from control circuit 222, incoming call notification circuit 228 rings the bell or generates a vibration to notify the user that the call has been received. Further, the incoming call notification circuit 228
Based on the control of the control circuit 222, the user can be notified of a special incoming call. For example, as a result of the comparison by the comparison circuit 206, when the number of the caller matches the number of the other party who does not want to respond registered in the memory 223, instead of immediately interrupting the communication, it differs from the normal incoming call notification. A method, for example, sounds a ringtone melody registered in advance by the user and notifies the user. Similarly, as a result of the source filtering performed by the filtering circuit 200, if the password transmitted from the source does not match the password registered in the memory 223, instead of immediately interrupting the communication, a normal incoming call notification is performed. A different way,
For example, an incoming melody registered in advance by the user is sounded and the user is notified.

FIG. 4 is a block diagram showing an example of the configuration of the filtering circuit 200. As shown, the filtering circuit 200 includes a selector 302, a password request signal generation circuit 304, and a password collation circuit 308. Hereinafter, each circuit will be described.

At the initial stage, the selector 302 is controlled so as to output a control signal to the personal identification number request signal generation circuit 304. Therefore, FIG.
Is output from the selector 302 to the personal identification number request signal generation circuit 304 by the selector 302. Thereafter, the selector 302 selects the signal line 208
Is output to the personal identification number matching circuit 308.

The password request signal generating circuit 304 generates a password request signal according to the control signal input from the selector 302 and outputs the signal to the multiplexer 212 shown in FIG. Therefore, the multiplexer 212 multiplexes the password request signal into the data stream and transmits the multiplexed transmission data via the transmission circuit.

When the caller, that is, the caller, receives the password request signal transmitted from the called party,
Send your PIN. The password is transmitted to the filtering circuit 200 via the selector 207 shown in FIG. In the filtering circuit 200, the selector 3
02 outputs the personal identification number input via the signal line 208 to the personal identification number collating circuit 308.

The password collation circuit 308 is connected to the selector 30
2 is compared with the password input from the memory 223 of the communication module 220, and as a result of the comparison, a communication cutoff control signal or an incoming call notification control signal is transmitted via the signal line 216 or 217. Module 2
20. If the password transmitted from the source does not match the password registered in the memory 223 as a result of the verification in the password verification circuit 308,
A password retransmission control signal for urging the source to retransmit the password is generated and output to the password request signal generation circuit 304 via the signal line 309. In this case, the personal identification number request signal generation circuit 304 receives the personal identification number retransmission control signal from the personal identification number collating circuit 308, generates a personal identification number request signal again, and outputs it to the multiplexer 212. As a result, the personal identification number transmission request signal is transmitted to the transmission source again.
That is, when the password from the sender does not match the password registered in the memory, a certain number of times is limited,
It is possible to repeatedly request the transmitting side to retransmit the personal identification number, and it is possible to prevent the transmission source from being interrupted by a transmission error of the personal identification number due to one transmission error or the like.

According to the result of the collation of the personal identification number, one of the following actions is taken: the communication is interrupted, the retransmission of the personal identification number is requested, or the incoming call is notified by a special notification method set in advance. Conceivable. Here, the respective cases will be described with reference to a circuit example of the personal identification number matching circuit 308.

FIG. 5 shows an example of the personal identification number matching circuit. As shown in FIG.
Is composed of a comparison circuit 311, a selector 313, and a password extraction circuit 315.

The comparison circuit 311 is provided with a personal identification number extracting circuit 31.
5 is compared with the registered password input from the memory 223, and the result of the comparison is indicated by the signal line 31.
2 to the selector 313. Selector 313
Selects an output destination of each signal according to the input signal from the selector 302 and the comparison result input from the comparison circuit 311 shown in FIG. For example, when a reception signal including a password is input from the selector 302, the selector 3
13 outputs the input signal to the personal identification number extracting circuit 315 via the signal line 314. On the other hand, when the comparison result is input from the comparison circuit 311, the selector 313 generates a control signal according to the comparison result, and
20 to a control circuit 222. For example, as a result of comparison in the comparison circuit 311, when a comparison result (OK) that matches the personal identification number transmitted from the transmission source and the personal identification number registered in the memory 223 is input, the selector 313 transmits a control signal indicating the incoming communication. Is generated and output to the control circuit 222 via the signal line 216. On the other hand, the comparison circuit 31
In step 1, when the comparison result (NG) that does not match the password transmitted from the source and the password registered in the memory 223 is input, the selector 313 generates a control signal for interrupting communication, The signal is output to the control circuit 222 via the signal line 217. The password extraction circuit 315
From the signal including the personal identification number input by the selector 313, only the part of the personal identification number is extracted, and the extracted personal identification number is output to the comparison circuit 311 via the signal line 316.

In the above-mentioned personal identification number collating circuit 308a, the personal identification number extracted by the personal identification number extracting circuit 315 is compared with the registered personal identification number inputted from the memory 223, and as a result of the comparison, the extracted personal identification number, that is, the transmission source When the personal identification number transmitted from the server and the personal identification number registered in the memory 223 coincide with each other, a control signal for performing an incoming call notification is generated and transmitted to the control circuit 222 of the communication module 220 via the selector 313. Module 22
At 0, an incoming call notification is generated in response to this control signal. On the other hand, as a result of the comparison in the comparison circuit 311, when the security code transmitted from the transmission source and the security code registered in the memory 223 do not match, a control signal for interrupting the communication is generated. 22
Therefore, the communication is interrupted in the communication module 220 in response to the control signal.

FIG. 6 shows another example of the personal identification number matching circuit. As shown in FIG.
08b includes a comparison circuit 311, a selector 320 (selector 1), a selector 322 (selector 2), and a password extraction circuit 315. The comparing circuit 311 and the password extracting circuit 315 are the same as the comparing circuit 311 and the password extracting circuit 31 of the above-described password collating circuit 308a.
5, since they have the same configuration and function in the same way, a description of these circuits will be omitted here.

The selector 320 outputs a password retransmission control signal or an incoming call notification control signal according to the comparison result output from the comparison circuit 311. As a result of the comparison by the comparison circuit 311, when the password transmitted from the transmission source matches the password registered in the memory 223 (comparison result is OK), the selector 320 generates an incoming notification control signal, and the signal line 321. Through the selector 322. On the other hand, as a result of the comparison in the comparison circuit 311, when the password transmitted from the source does not match the password registered in the memory 223 (comparison result is NG), a password retransmission control signal is generated, and the signal line 309 is output. To the personal identification number request signal generation circuit 304 shown in FIG.

The selector 322 controls the output destination of the signal input from the selector 302 or the selector 320. When a reception signal including a password is input from the selector 302 via the signal line 307, the selector 322
Outputs the input signal to the personal identification number extracting circuit 315 via the signal line 323. On the other hand, when an incoming notification control signal is input from the selector 320 via the signal 321,
The selector 322 outputs this control signal to the control circuit 222 of the communication module 220 via the signal 217.

In the above-described password collating circuit 308b, the password extracted by the password extracting circuit 315 is compared with the registered password inputted from the memory 223, and as a result of the comparison, the extracted password, ie, the source When the personal identification number transmitted from the storage device 223 matches the personal identification number registered in the memory 223, the incoming notification control signal is output to the selector 32.
0, and is output to the control circuit 222 of the communication module 220 via the selector 322, so that the communication module 220 generates an incoming call notification according to the control signal. On the other hand, as a result of the comparison in the comparison circuit 311, the password transmitted from the transmission source and the memory 223.
When the passwords registered in the
Since a password retransmission control signal is generated by "0" and output to the password request signal generating circuit 304, the password request signal is reproduced and transmitted to the transmission source accordingly.

FIG. 7 shows another example of the personal identification number matching circuit. As shown in FIG.
08c is a comparison circuit 311, a selector 330 (selector 1), a selector 332 (selector 2), and a counter 334.
And a password extraction circuit 315.
The comparison circuit 311 and the password extraction circuit 315 have the same configuration and function in the same manner as the comparison circuit 311 and the password extraction circuit 315 of the above-described password collation circuit 308a. Description is omitted.

The selector 330 outputs a password retransmission control signal or an incoming call notification control signal according to the comparison result output from the comparison circuit 311. In addition, counter 3
It outputs a communication cutoff control signal in response to an input signal from. As a result of the comparison in the comparison circuit 311, when the password transmitted from the transmission source matches the password registered in the memory 223 (the comparison result is OK), the selector 32
0 generates an incoming notification control signal and outputs it to the selector 322 via the signal line 321. On the other hand, as a result of the comparison in the comparison circuit 311, when the password transmitted from the source does not match the password registered in the memory 223 (comparison result is NG), a password retransmission control signal is generated, and the signal line 309 is output. To the personal identification number request signal generation circuit 304 shown in FIG. When the number of transmissions of the password reproduction request signal reaches a certain number, a signal indicating that the number of password retransmissions has reached a predetermined value is generated from the counter 334,
The signal is input to the selector 330 via the signal line 335. The selector 330 receives this signal, generates a communication cutoff control signal, and outputs it to the selector 332.

The selector 332 controls the output destination of the input signal from the selector 302 and the control signal from the selector 330. For example, when a received signal including a password is input from the selector 302 via the signal line 307, the selector 332 outputs this input signal to the signal line 333.
The password extraction circuit 315 extracts the password transmitted by the source from the signal input via the signal line 333 and outputs the password to the comparison circuit 311. On the other hand, the counter 33
4 performs a counter in accordance with the signal input via the signal line 333, and when the counter value reaches a preset value, generates a signal notifying the counter value.
And outputs the result to the selector 330. Selector 3
The selector 332 outputs the control signal to the control circuit 222 of the communication module 220 via the signal line 216 when the incoming call notification control signal is output from the selector 30, and outputs the communication cutoff control signal from the selector 330. , The selector 332 outputs this control signal to the control circuit 222 of the communication module 220 via the signal line 217.

In the above-mentioned personal identification number collating circuit 308c, the personal identification number extracted by the personal identification number extracting circuit 315 is compared with the registered personal identification number inputted from the memory 223, and as a result of the comparison, the extracted personal identification number, that is, the transmission source When the personal identification number transmitted from the storage device 223 matches the personal identification number registered in the memory 223, the incoming notification control signal is output to the selector 33.
0, and is output to the control circuit 222 of the communication module 220 via the selector 332, so that the communication module 220 generates an incoming call notification according to the control signal. On the other hand, as a result of the comparison in the comparison circuit 311, the password transmitted from the transmission source and the memory 223.
If the password registered in the password does not match, the selector 33
Since a password retransmission control signal is generated by "0" and output to the password request signal generating circuit 304, the password request signal is reproduced and transmitted to the transmission source accordingly.
When the counter 334 outputs a signal indicating that the number of transmissions of the personal identification number retransmission request has reached a certain value, the selector 330 generates a communication cutoff control signal, and the control circuit 22 of the communication module 220 via the selector 332.
2 is output. Communication is cut off accordingly.

FIGS. 8 to 10 are flowcharts showing the procedure of source filtering in the communication terminal of this embodiment. Hereinafter, these flowcharts and FIG.
The operation of source filtering of the communication terminal in the communication system of the present embodiment will be described with reference to block diagrams of the communication terminal of FIG.

First, as shown in FIG. 8, when the communication terminal receives a call from a caller, it is determined whether or not the caller gives a number notification (401). When notifying the number, the number transmitted by the caller is extracted, and in step 402, the caller's number is compared with a previously registered number, and an incoming call notification is performed according to the comparison result (403), or Cut off communication (4
04). The source number is extracted by, for example, the source number extracting circuit 203 shown in FIG. 3, and the comparison of the numbers is performed by the comparing circuit 205.

It should be noted that the source filtering processes 402 to 404 performed in the case of the number notification described above are almost the same as the filtering processes performed in the conventional communication terminal. The source filtering processing 405 to 409 performed when the number is not notified is a new function provided by the communication system of the present embodiment. Hereinafter, this will be described in more detail.

When it is determined that the caller does not notify the number,
The processing after step 405 is performed. First, a password transmission request signal is generated and transmitted to the source (40).
5). In response to this, the communication source transmits the password, and the communication terminal receives the password (406). The received password is compared with a previously registered password (4).
07) Depending on the result of the comparison, an incoming call notification is made (408) or a communication process is performed (409).
The communication 409 process will be described in more detail.

As a result of the password comparison, if the password transmitted from the source coincides with the registered password, an incoming call notification is made. On the other hand, if the password transmitted from the source does not match the registered password, some actions are taken.
In the simplest process, since the passwords do not match, it is determined that the source user does not have a common password with the user of the communication terminal, and the communication is interrupted. The personal identification number matching circuit 308a shown in FIG. 5 is an example of a configuration for executing this processing. That is, as shown in FIG.
1 is compared with the password registered in the memory 223 of the communication module 220, and according to the result of the comparison, if both match, the incoming notification control signal is transmitted to the communication module 220. Is transmitted to the control circuit 222, and when the two do not match, a communication cutoff control signal is transmitted to the control circuit 222.

According to the above-described procedure of the communication processing, an incoming call notification is issued when the passwords match, and the communication is interrupted when the passwords do not match, according to the comparison result of the passwords. However, before the communication is interrupted, information indicating that the communication will be interrupted can be notified to the transmission source by voice, data, or the like.

However, in the above-described processing procedure, when the transmission source transmits the personal identification number in response to the personal identification number transmission request from the communication partner, the personal identification number is affected by one transmission error or the noise of the transmission path. When an error occurs in the transmission data indicating “”, the communication path already established is interrupted, so that communication between users may not be performed smoothly. The communication processing procedure which improved this is shown in FIG.
10 and FIG. These improved communication processing procedures are performed by the password collation circuit 30 shown in FIGS.
8b and 308c.

First, the password verification circuit 308 shown in FIG.
The operation b will be described with reference to the flowchart of the processing procedure shown in FIG. In step 511, a password transmission request signal is transmitted from the communication terminal to the source to prompt the transmission of the password. In response, the source transmits a password. The communication terminal receives the transmitted personal identification number (step 512). And step 51
At 3, the personal identification number transmitted from the transmission source is compared with the personal identification number registered in the memory 223 of the communication module 220, and as a result of the comparison, the personal identification number transmitted from the transmission source matches the registered personal identification number. , The password is OK, and if they do not match, the password is NG.

If the password is OK, an incoming call notification control signal is generated in step 514, and the communication module 2
20 is transmitted to the control circuit 222, and accordingly, the communication module 220 performs an incoming call notification.
On the other hand, when the personal identification number is NG, the personal identification number transmission request signal is transmitted to retransmit the personal identification number to the transmission source. In the flowchart showing the processing procedure of FIG. 9, the processing after requesting the retransmission of the personal identification number is not specified, but some processing can be considered. For example, the communication terminal receives the password retransmitted from the source and compares it with the registered password. As a result of the comparison, the retransmitted password is OK.
In the case of (2), an incoming call notification control signal is transmitted to the control circuit 222 of the communication module 220 to notify the user of the incoming call. Also, as a result of the comparison, when the retransmitted password is NG, the communication cutoff control signal is transmitted to the control circuit 222 of the communication module 220.
, And cut off the communication.

Next, the password verification circuit 308 shown in FIG.
The operation c will be described with reference to the flowchart of the processing procedure in FIG. As shown in FIG. 6, a counter 334 that counts the number of transmissions of the personal identification number from the transmission number is provided in the personal identification number collating circuit 308c. The counter 334 counts the number of transmissions i of the personal identification number, and when the number of transmissions i reaches a preset upper limit value max, performs control such that communication is interrupted. Less than,
The procedure of this processing will be described.

First, in step 521, the count value i is cleared to zero. Next, it is determined whether or not the counter value i has reached the set upper limit value max (step 522). If the count value i is smaller than the upper limit value max, a reference number transmission request signal is transmitted to the transmission source. In response to this, the transmission source personal identification number is transmitted and received by the communication terminal (step 526). And
The received personal identification number is compared with the registered personal identification number (step 527). If the comparison result is OK, an incoming call notification control signal is generated and transmitted to the control circuit 222 of the communication module 220. In response, the user is notified of the incoming call. On the other hand, when the comparison result is NG, 1 is added to the count value i (Step 525), and Step 5
It returns to the process of 22.

In step 522, the count value i is compared with the set upper limit value max, and if the count value i is smaller than the upper limit value max, the processing from step 523 described above is repeatedly performed, and the password is transmitted to the transmission source. Is issued. On the other hand, when it is determined in step 522 that the count value i has reached the upper limit value max (i = max), the process of step 524 is executed, and communication is interrupted.

That is, when the password transmitted from the source does not match the registered password, the communication terminal repeatedly requests the source to retransmit the password within the preset number of times. If the password transmitted from the source matches the registered password within the limited number of times, an incoming call notification is made. However, if the PIN transmitted from the source does not match the registered PIN within the limited number of times, it is determined that the source user does not have a common PIN with the user of the communication terminal, and Is blocked, or the user is notified of the incoming call preset method, for example,
The user informs the user that there is a call from a caller whose password does not match the designated incoming melody.

As described above, according to the communication system of the present embodiment, the communication terminal called by the source (here, regarded as the receiving device) requests the source for the personal identification number, and So-called sender filtering is performed to determine whether or not to answer the call of the sender according to the transmitted personal identification number. Thus, only users of the communication system sharing a predetermined password can communicate with each other, calls from a source having no password can be filtered out, and the user can use the communication terminal. Can be used comfortably. Note that source filtering in the communication terminal is automatically performed according to a preset procedure between the called communication terminal and the source communication terminal, and the user of the communication terminal does not need to be involved in this filtering. Since the incoming call is notified to the user when the source is confirmed by filtering, the only work required for the owner of the communication terminal is to register the password,
Communication device owners do not have to do any extra work,
It is possible to use the communication terminal comfortably and safely.

Furthermore, registering a personal identification number in the communication terminal and filtering the transmission source by the registered personal identification number is equivalent to virtually increasing the terminal number of one user. For example, when a four-digit password is set, this is equivalent to the user having 10,000 communication terminals. Therefore, the user can virtually have a plurality of communication terminal numbers, and can use the numbers properly according to the situation, thereby improving the convenience of the terminal user. Also, in order to realize this, there is almost no change in equipment such as a base station, and only a change in a communication terminal, for example, a mobile communication terminal such as a mobile phone or a car phone is required. Costs can be kept to a minimum.

Second Embodiment FIG. 11 is a circuit diagram showing a second embodiment of the communication system according to the present invention. As shown in the figure, the communication system of the present embodiment includes communication terminals 110 and 140 owned by user 1 (100) and user 2 (150), a network 120 for transmitting information, and a service area where user 2 is located. And an information providing device 160 for providing predetermined information to a user of the communication system.

The user 1 can call the information providing apparatus 160 via the communication terminal 120 and acquire predetermined information on the user 2 from the information providing apparatus 160, for example, position information indicating the location of the user 2 and the like. . When receiving the information provision request from the user 1, the information providing apparatus 160 transmits a request for calling the communication terminal 140 to the base station 130 via the network 120. Then, when permission to provide information is obtained from the calling communication terminal, the user 1
The necessary information is transmitted to the communication terminal 120.

Information exchange between the base station 130 and the communication terminal 140 for establishing a communication state, for example, a call signal (Pag
ing), transmission of a response signal (Ack) from the communication terminal 140 to the base station 130, notification of assignment of a physical channel for communication, and the like, are similar to the processes in the communication system of the above-described first embodiment. Since the processing is performed according to the procedure, the details will not be described here.

The user 2 (exactly the communication terminal 140)
The information service that provides the location information of the PHS (Personal Handy), which currently provides the communication service, for example,
phone System, simplified mobile phone). Since this communication system uses base stations that transmit and receive signals with low power, a communication network is formed by deploying a plurality of base stations in a service area.
When communication is performed between a base station and a portable terminal, information that is closest to the portable terminal from a plurality of base stations, that is, the one with the best communication state is selected, and information is transmitted. For this reason, the location of the portable terminal can be grasped with an accuracy of several hundred meters, and in some cases, several tens of meters from the location information of the base station used for communication. For this reason,
In the communication system according to the present embodiment, the location information of the communication terminal 140 obtained through the base station 130 is provided to the information providing apparatus 16.
0, and the other users are
For example, it can be provided in response to a request for information provision from the user 1.

Since the location information is information relating to personal privacy, it may be inconvenient for the user 2 to easily respond to a request for information provision from all users. In the system, when there is a request from another user, for example, the user 1 to obtain the location information of the user 2, the information providing apparatus 160 transmits the user 2 via the network 120 and the base station 130.
To provide the location information to the user 1, and only when the consent of the user 2 is obtained,
The information is provided in a processing procedure of providing the position information of the user 2 to the user. This confirmation work is performed using a personal identification number predetermined between the user 1 and the user 2. That is, when the user 1 requests the information providing apparatus 160 to provide the location information of the user 2, the information providing apparatus 160 first receives a request to provide information to the communication terminal 140 via the network 120 and the base station 130. Let them know.
In response to this, the communication terminal 140 requests transmission of the personal identification number, and the information providing device 160 requests the user 1 to transmit the personal identification number when the communication terminal 140 requests transmission of the personal identification number. The user 1 transmits the password in response to the transmission request of the password, and the information providing apparatus 160 transmits the password transmitted from the user 1 to the network 120 and the base station 130.
To the communication terminal 140 of the user 2 via. The communication terminal 140 compares the personal identification number transferred from the information providing apparatus 160 with a pre-registered personal identification number, and instructs the information providing apparatus to provide the user 1 with his / her own position information when the personal identification numbers match. On the other hand, if the passwords do not match, it instructs the information providing device 160 not to provide its own position information. The information providing apparatus 160 provides information in accordance with an instruction from the communication terminal 140, or notifies the user 1 who has requested the provision of the location information that the information cannot be provided due to a mismatch of the password. it can.

FIG. 12 is a flowchart showing a communication procedure of the communication system of the present embodiment. Hereinafter, the operation of the communication system of the present embodiment will be described with reference to FIGS.

First, the user 1 enters the communication terminal 110 (FIG. 12).
(Not shown) is transmitted to the information providing device 160 (601).
When receiving the information acquisition request from the user 1, the information providing apparatus 160 transmits the information to the base station 13 via the network 120.
A communication terminal call request signal 602 for calling the communication terminal 140 is transmitted to 0. When the base station 130 receives the paging request signal 602, the paging signal (Pagi
ng) 603 via the paging channel (PCH).

When receiving the call signal 603, the communication terminal 140 sends a response signal (Ack) 60 to the base station 130.
4 is returned via the response signal channel (RACH).
The base station 130 that has received the response signal 604 from the communication terminal 140 transmits a physical channel allocation notice signal 605 to the communication terminal 140. Communication terminal 140 receives this notice signal 605 and transmits response signal 606 to base station 130. Then, the physical channel assignment signal 607 is transmitted by the base station 130. As a result, a physical channel for performing information communication between the base station 130 and the communication terminal 140 is established, and the information providing apparatus 160 and the communication terminal
It is in a state where it can communicate with 0 (communication state 618).

The communication terminal 140 performs an authentication operation including confirmation of a communication partner by performing pattern authentication until the above-described communication state is established. For example, when the call signal 603 is received from the base station 130, first, authentication based on pattern 1 is performed (3
07), a response signal 604 is transmitted to the base station 130 according to the result of the authentication. Then, when the physical channel allocation notice signal 605 is received from the base station 130, authentication based on pattern 2 is performed (308), and a response signal 607 is transmitted to the base station 130 according to the result of the authentication.

With the two authentications 307 and 308 described above, the communication terminal 140 can call its own communication partner,
It is possible to recognize that the information providing apparatus 160 is used, and it is also possible to acquire important information for performing communication, such as the communication state and the communication performance of the communication partner. Information providing device 16
The information communication between the information providing apparatus 160 and the communication terminal 140, which is actually performed after the communication path is established between the communication terminal 140 and the communication terminal 140, is performed based on the information.

After the communication state between the information providing apparatus 160 and the communication end pressure 140 has been established, first, a password request signal 619 is transmitted from the communication terminal 140 to the information providing apparatus 160. When receiving the password request signal 619, the information provision device 160 transfers the password request signal to the communication terminal 110 of the user 1 (620). Communication terminal 11
0 indicates that the personal identification number 621 is assigned to the information providing apparatus 1 in response to the personal identification number request signal 620 input from the information providing apparatus 160.
Send to 60.

The information providing apparatus 160 transmits the personal identification number 621 transmitted from the communication terminal 110 of the user 1 to the communication terminal 14
0 (622). The communication terminal 140 transmits the personal identification number 622 transferred via the information providing device 160 to the
The password is compared with a password registered in advance, and an instruction is given to the information providing apparatus 160 according to the result of the comparison. For example,
When the transferred personal identification number matches the registered personal identification number, a provision instruction for providing information is transmitted to the information provision apparatus 160. Conversely, if the transferred personal identification number does not match the registered personal identification number, a cutoff instruction not to provide information is transmitted to the information providing device 160.

The information providing apparatus 160 provides an information providing service to the user 1 in response to an instruction from the communication terminal 140. For example, when a provision instruction is received from the communication terminal 140, the request information data is transmitted to the communication terminal 110 of the user 1 (625). On the other hand, when receiving a cutoff instruction from the communication terminal 140, the communication with the user 1 is cut off. Alternatively, before the communication is interrupted, the communication terminal 110 of the user 1
In addition, a message that information cannot be provided due to a mismatch in the passwords may be transmitted, and then the communication may be interrupted.

In the communication system of this embodiment, the circuit for authenticating the personal identification number in the communication terminal 140 is the same as that of the communication terminal 1 in the first embodiment.
The circuit configuration may be the same as 40. That is, the communication terminal 14
0 is provided with a source filtering circuit 200 shown in FIG. 3 and the communication module 220 further includes a control circuit 222 for controlling source filtering, a memory 223 for storing a password registered by a user, and the like. It can be realized by providing. Filtering circuit 200
Is composed of, for example, a password request signal generation circuit 304 and a password collation circuit 308, as shown in FIG.
Can be configured as shown in FIG.

That is, in the communication system of the present embodiment, the source terminal filtering by the communication terminal 140 is performed by the communication terminal 140 for the user 1 (the communication terminal 110) who has requested the information providing device 160 to obtain the information. Done. In the communication terminal 140, the information providing device 16
The user 1 is confirmed based on a comparison between the password transmitted from 0 and the password registered in advance. User 1
Information providing device 1 when the user has a common personal identification number
The user 1 is instructed to provide information, and if the user 1 does not have a common password, the user 1 is instructed to cut off the communication to the information providing apparatus 160. If the passwords do not match, the user 1 can be confirmed by requesting the user 1 to retransmit the password and comparing the retransmitted password again. Further, it is possible to repeatedly request the user 1 to retransmit the personal identification number within a preset number of times, and if the valid password is not transmitted from the user 1 within the preset number of times, the communication can be cut off.

As described above, according to the present embodiment, the user 2 (communication terminal 140)
Recognition using a password, that is, source filtering, is performed on the user 1 who requests the provision of information about the user. The communication terminal 140 compares whether the password transmitted from the user 1 matches the password registered in advance, and when the password matches as a result of the comparison, the user 1 Is transmitted to the user 1 in response to the instruction to provide the requested information. On the other hand, if the passwords do not match as a result of the comparison, a signal is transmitted to the information providing apparatus to instruct communication interruption, or the user 1 is requested to retransmit the password within a preset number of times, and retransmitted. If the provided password is valid, the information providing device 160 is instructed to provide information. If all the passwords retransmitted within a predetermined number of times are invalid, the information providing device 160 is blocked from communicating. To instruct. In this way, by performing source filtering on the user 1 who has requested information provision, the target of information provision can be limited, and the user of the communication terminal can send information about himself to other users. It is possible to selectively provide, and the filtering of the caller is automatically performed by the communication terminal only by registering the password in advance in the communication terminal, and it is not necessary for the user to be involved in this. It is not necessary for the user to perform troublesome confirmation work, and the information can be provided with confidence.

In the communication system according to the second embodiment, the information providing apparatus 160 provides an information providing service for providing the location information of the user 2 to another user. However, the present invention is not limited to this. It goes without saying that the present invention can be applied to the case where other information is provided to the user of the communication terminal by the information providing device 160 without being performed. For example, when the user 2 provides information such as a database including specific information to a specific user, the database is stored in a server computer or the like, and the server computer is connected to the information providing device 16 of the above-described second embodiment.
0 is incorporated in the communication system. Then, a predetermined password is distributed to one or more specific users, and the password is registered in a communication terminal owned by the user, for example, a mobile phone. When another user, for example, User 1 wants to access information in a database or the like in the server computer, first, according to the communication procedure of the above-described second embodiment, first, a request signal for providing information is transmitted to the server computer, After establishing a communication path with the communication terminal 140 of the user 2 through the mediation of the computer, the personal identification number is transmitted to the communication terminal 140, and when the personal identification number is confirmed by the communication terminal 140, the user 1 accesses the server computer. By permitting, the user 1 can access information such as a database in the server computer.

As described above, by constructing the communication system including the server computer, the user 2 can share specific information with a specific group of people, and can easily realize security management. further,
Without significantly changing the normal communication system, it is possible to provide information only to specific users by adding a circuit for source filtering to the communication terminal and only by a simple operation such as registering a password, The convenience and security of the operation can be improved.

[0096]

As described above, according to the communication system of the present invention, it is possible to perform filtering on a source using a password. Further, the exchange of information for collating the personal identification number is performed between the communication terminal on the receiving side and the user on the calling side, so that the user on the receiving side does not know the information at all. As a result, the user of the communication terminal can use the communication terminal comfortably without being disturbed by a call from an unpleasant source. Also, having a personal identification number in a communication terminal is equivalent to virtually increasing the communication terminal number of one user. For example, using a four-digit password is equivalent to having 10,000 telephones. As a result, the user of the communication terminal can virtually have a plurality of communication terminal numbers, and by appropriately using the numbers depending on the situation,
The convenience of the terminal user can be improved. Furthermore, in order to realize this method, there is almost no change on the base station side and only on the terminal side, so that the cost for introducing the service can be minimized. Also,
By applying a source filtering method using a password to a communication system having an information providing service function, information owned by a specific user can be provided to only a specific user via the communication system. That is, when one or a plurality of users having a common PIN with a certain specific user are confirmed by filtering the source by the personal identification number, access to the information provided by the specific user is permitted. For this reason, there is an advantage that the user of the communication system can share specific information with other users, and can improve the convenience and security of providing information.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a first embodiment of a communication system according to the present invention.

FIG. 2 is a diagram showing a communication procedure of the first embodiment of the communication system according to the present invention.

FIG. 3 is a block diagram showing a configuration of a partial circuit of a communication terminal in the communication system according to the first exemplary embodiment of the present invention.

FIG. 4 is a block diagram illustrating a configuration of a filtering circuit in a communication terminal.

FIG. 5 is a block diagram illustrating a configuration example of a personal identification number matching circuit;

FIG. 6 is a block diagram showing another configuration example of the personal identification number matching circuit;

FIG. 7 is a block diagram illustrating another configuration example of the personal identification number matching circuit;

FIG. 8 is a flowchart illustrating a source filtering processing procedure in the communication system according to the first embodiment of this invention.

FIG. 9 is a flowchart showing a communication processing procedure when passwords do not match.

FIG. 10 is a flowchart showing another communication processing procedure when the passwords do not match.

FIG. 11 is a block diagram showing a second embodiment of the communication system according to the present invention.

FIG. 12 is a diagram showing a communication procedure in a second embodiment of the communication system according to the present invention.

FIG. 13 is a diagram showing an example of a communication procedure in a conventional communication system.

FIG. 14 is a flowchart showing a procedure for confirming a source number in a conventional communication system.

[Explanation of symbols]

10 ... user, 20 ... network, 30 ... base station, 4
0: communication terminal, 50: user, 100: user, 110
... communication terminal, 120 ... network, 130 ... base station,
140 communication terminal, 150 user, 200 filtering circuit, 203 source number extraction circuit, 205 comparison circuit, 220 communication module, 222 control circuit,
223: memory, 225: interface, 228 ...
Incoming call notifying circuit, 305: password request signal generating circuit, 3
08: security code collation circuit, 311: comparison circuit, 315 ...
PIN code extraction circuit, 334... Counter.

Claims (24)

[Claims] 1. A communication system for transmitting information between a first user and a second user via a communication path, wherein the communication is transmitted from the first user to the second user. Requesting the first user to transmit a personal identification number, the personal identification number transmitted from the first user and the second user holding the personal identification number in response to the request. A communication system comprising: a source identification unit that compares a personal identification number that is present and notifies the second user of an incoming call according to the comparison result. 2. When a communication request transmitted from the first user to the second user is received, the communication between the first user and the second user is made in response to the communication request. 2. The communication system according to claim 1, further comprising communication path establishing means for establishing an information transmission path. 3. The communication device according to claim 1, wherein said transmission source confirming means has a comparing means for comparing a personal identification number transmitted from said first user with a personal identification number held by said second user. Communication system. 4. If the result of the comparison is that the password transmitted from the first user matches the password held by the second user, the second user is notified of the incoming call. And a communication cutoff unit that cuts off communication if the password transmitted from the first user does not match the password held by the second user as a result of the comparison. 4. The communication system according to claim 3, comprising: 5. If the result of the comparison is that the password transmitted from the first user matches the password held by the second user, the second user is notified of the incoming call. And if the result of the comparison is that the password transmitted from the first user does not match the password held by the second user, 4. The communication system according to claim 3, further comprising retransmission request means for requesting retransmission of the personal identification number. 6. The retransmission request means has a counter for counting the number of retransmission requests, and the communication cutoff means cuts off communication when the count value of the counter reaches a preset upper limit number. Claim 5
A communication system as described. 7. A communication method for transmitting information between a first user and a second user via a communication path, wherein the first user and the second user transmit information to the second user. Requesting the first user to transmit a personal identification number when receiving the communication request, and the personal identification number transmitted from the first user in response to the personal identification number transmission request and the second user. A communication method comprising: comparing a personal identification number held by a user; and determining whether to notify the second user of an incoming call according to a result of the comparison. 8. A communication method according to claim 7, further comprising the step of establishing a communication path between said first user and said second user in response to a communication request from said first user. . 9. A password transmitted from the first user is compared with a password held by the second user, and if the passwords match as a result of the comparison, 8. The communication method according to claim 7, further comprising the step of: notifying the second user of an incoming call; and, if the passwords do not match as a result of the comparison, the step of interrupting the communication. 10. The communication method according to claim 9, further comprising the step of requesting the first user to retransmit the password if the passwords do not match as a result of the comparison. 11. As a result of the comparison, if the passwords do not match, a step of requesting the first user to retransmit the password, and the number of times of the retransmission request has reached a preset upper limit number 10. The communication method according to claim 9, further comprising a step of interrupting communication. 12. An information providing means for providing predetermined information to a user, and when the first user requests the information providing means to acquire information, the information providing means sends the information acquisition request to the first information providing means. The first user is requested to provide a password in response to the acquisition request, and the password transmitted from the first user and the second user in response to the request. A password collating means for comparing the password with a password possessed by the user, and instructing the information providing means whether or not to provide information to the first user according to a comparison result of the password collating means. A communication system comprising: 13. The personal information providing control means, as a result of the personal identification number comparison by the personal identification number collating means, the personal identification number transmitted from the first user and the personal identification number held by the second user. When the password matches, the information providing means is instructed to provide information to the first user. As a result of the password comparison, the password transmitted from the first user and the second use 13. The communication system according to claim 12, wherein when the password does not match the password held by the user, the information providing means is instructed not to provide information to the first user. 14. When the password comparison by the password collating means shows that the password transmitted from the first user does not match the password held by the second user, 13. The communication system according to claim 12, further comprising retransmission request means for requesting one user to retransmit the personal identification number. 15. The retransmission request means has a counter for counting the number of retransmission requests, and the information provision control means, when the number of transmissions of the retransmission request reaches a preset upper limit number, 15. The communication system according to claim 14, wherein an instruction not to provide information to said first user is issued to an information providing means. 16. A communication method in a communication system having information providing means for providing predetermined information to a user via a communication path, wherein a first user requests the information providing means to acquire information. Transferring the information acquisition request to the second user by the information providing means; requesting the first user for a personal identification number in response to the transferred information acquisition request; Comparing the password transmitted from the first user in response to the request for the password with the password held by the second user; and Instructing the information providing means whether to provide information to the first user. 17. A comparison between the password transmitted from the first user and the password held by the second user, and if the passwords match, the information providing means sends the information to the information providing means. Including a step of instructing the first user to provide information, and a step of instructing the information providing means not to provide information to the first user when the passwords do not match as a result of the comparison. The communication method according to claim 16. 18. The communication method according to claim 17, further comprising a step of requesting the first user to retransmit the password if the passwords do not match as a result of the comparison. 19. The communication according to claim 18, further comprising the step of instructing said information providing means not to provide information to said first user when said number of retransmission requests reaches a preset upper limit number. Method. 20. Upon receiving a communication request from a first user, requests the first user to transmit a personal identification number, and in response to the request, transmits the personal identification number transmitted from the first user. And a personal identification number held by the second user, and based on the result of the comparison, a receiving device having a sender confirmation unit for notifying the second user of an incoming call. 21. A password verification means for comparing a password transmitted from said first user with a password held by said second user, said password verification means comprising: An incoming call notifying means for notifying the second user of an incoming call when the personal identification number transmitted from the first user matches the personal identification number held by the second user as a result of the number comparison; And a communication cutoff means for cutting off communication when the password transmitted from the first user does not match the password held by the second user as a result of the password comparison. The receiving device according to claim 20. 22. As a result of comparing the passwords, when the password transmitted from the first user does not match the password held by the second user, the first user is notified. 22. The receiving apparatus according to claim 21, further comprising a password retransmission request unit for requesting retransmission of the password. 23. A communication device, comprising: a counter for counting the number of times of requesting retransmission of the personal identification number, wherein the communication cutoff means cuts off communication when the count value of the counter reaches a preset upper limit value. 23. The receiving device according to 22. 24. Storage means for storing a personal identification number held by said second user, wherein said personal identification number collating means stores the personal identification number transmitted from said first user and said storage means. 22. The receiving device according to claim 21, wherein the receiving device compares the password with a password stored in the receiving device.