JPH10327469A - Communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a communication system that includes a radio communication system by which a voice message service is surely rendered to users. SOLUTION: In the case that a PHS base station CS1 receives no reply regardless of transmission of an incoming call signal to a PHS terminal PS1 and a voice message from a caller is stored in a voice message storage section, when a free storage area of the voice message storage section is a prescribed capacity or less, the PHS base station CS1 and a connector CN set up through their own devices a communication link between the caller and a PHS base station CS 2 having a sufficient free storage area in its voice message storage section. Then the PHS base station CS1 and the connector CN transfer the voice message from the caller to the PHS base station CS 2, which stores the message.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to, for example, PHS
(Personal Handyphone System), etc., when a terminal device does not respond to an incoming call, a base station device responds in place of this terminal device and has a function of storing a voice message from a caller. The present invention relates to a communication system including a communication system.

[0002]

2. Description of the Related Art As is well known, PHS provides various voice message services such as incoming voice messages and outgoing voice messages. When the PHS terminal receives an incoming voice message and the user does not respond within a certain period of time, the PHS base station apparatus responds on behalf of the PHS terminal and the sender stores the voice message in the built-in voice message storage unit. The input voice is stored as a voice message.

[0003] The PHS base station device that stores voice messages in this way transfers the stored voice messages to the voice message storage center periodically or when the remaining capacity of the storage area of the voice message storage unit becomes small.

[0004] As a result, voice messages are centrally managed by a voice message storage center, and a user of a PHS terminal can reproduce a voice message even from a place other than the wireless zone of the PHS base station device which initially stored the voice message. Can be.

However, in the conventional system, PH
Although the storage capacity of the voice message storage unit of the S base station apparatus is low and the stored voice messages are desired to be transferred to the voice message storage center, the voice of the voice message storage center is increased due to increased traffic. In some cases, message transfer cannot be performed. When a service request for a new incoming voice message occurs in such a state, there is a problem that the voice message service cannot be executed.

[0006]

In a communication system such as a conventional wireless communication system, for example, a voice message stored in a voice message storage unit of a wireless base station device when the remaining capacity of the storage area is reduced becomes small. In some cases, voice messages cannot be transferred due to an increase in traffic at the voice message storage center despite the fact that it is desired to be transferred to the center. When a service request for a new incoming voice message occurs in such a state, there is a problem that the voice message service cannot be executed.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem. Even if a request for storing a new voice message occurs when the remaining voice message storage area of the radio base station apparatus is insufficient, the present invention is not limited to this. An object of the present invention is to provide a communication system capable of storing a message and reliably executing a voice message service for a user.

[0008]

In order to achieve the above object, a communication system according to the present invention comprises: a radio base station device connected to a mobile communication terminal via a radio communication line;
A connection device for accommodating a plurality of the radio base station devices and connecting to a public network, wherein when the mobile communication terminal does not respond to the incoming call, the radio base station device stores the voice from the caller in the voice message storage unit. In a communication system for recording a message, when recording a voice message from a caller in a voice message storage unit, the radio base station apparatus may make a call if the free storage area of the voice message storage unit is less than a predetermined amount. A communication link holding unit for holding a communication link established between the caller and a vacant storage area of the voice message storage when the voice message from the caller is recorded in the voice message storage; A call with proxy recording request information is directed to the connection device, and a message transfer link opening means for opening a new communication link and the communication link holding means hold the call. A message transfer means for transferring a voice message sent by a caller via the communication link to a connection destination of the communication link established by the message transfer link establishment means, and when the free storage area of the voice message storage unit is equal to or more than a predetermined amount, Message receiving link opening means for opening a communication link with a caller of the incoming call in response to the incoming call when there is an incoming call with the substitute recording request information, and opening the message receiving link Voice message proxy storage means for storing the voice message sent via the communication link established by the means in the voice message storage unit, wherein the connection apparatus performs proxy recording from the wireless base station apparatus accommodated by the connection apparatus. When there is a call with the request information, the call with the proxy recording request information is made to another wireless base station device accommodated in the own device. Was to be configured by including the inter-base station link establishing means for establishing a communications link between the radio base station apparatus which has performed the wireless base station device and the calling to respond to this call.

In the communication system having the above configuration, for example, the first
When the wireless base station apparatus sends an incoming signal to the mobile communication terminal, there is no response. Therefore, when the voice message from the caller is recorded in the voice message storage section, an empty storage area of the voice message storage section is used. Is less than or equal to a predetermined amount, the first wireless base station apparatus and the connection apparatus, via their own apparatuses, respectively, provide the caller and the second wireless base station apparatus having a sufficient free storage area in the voice message storage unit. Establish a communication link with Then, the first wireless base station device and the connection device transfer the voice message from the caller to the second wireless base station device and record the voice message in the second wireless base station device. .

Therefore, according to the communication system having the above configuration, even if a request for storing a new voice message occurs in a state where the free storage area of the voice message storage unit of the radio base station apparatus is insufficient, the voice message is transmitted to another. Can be stored in the voice message storage unit of the wireless base station device,
The voice message service can be reliably provided to the user.

Further, in order to achieve the above object, a communication system according to the present invention comprises a base station connected to a wireless communication terminal via a wireless communication line, and a plurality of base stations accommodating the base station. In a communication system including a connection device connected to a network and capable of providing a voice message service to a communication terminal user, even if the base station device sends an incoming signal to the communication terminal, the communication terminal If there is no response, the voice message storage means for recording a voice message from the caller, and if the free space of the voice message storage means is less than a predetermined amount, the base station device and the connection device each make their own calls. The means for establishing a communication link between the caller and another base station apparatus, and the base station apparatus and the connection apparatus whose free space of the voice message storage means is equal to or less than a predetermined amount are transmitted by the sound from the caller. The message comprising the means for transferring to the other base station apparatus.

Further, according to the present invention, there is provided a first device connected to a communication terminal via a communication line, and a connection device accommodating a plurality of the first devices and connecting to a fixed network, and If the first device sends an incoming signal to the communication terminal and there is no response to the communication terminal, the voice message from the caller is provided. When the free space of the voice message storage means and the voice message storage means is equal to or less than a predetermined amount, the first device and the connection device respectively communicate between the caller and the other first device via themselves. Means for establishing a communication link, means for transferring a voice message from the caller to another first apparatus, wherein the first device and the connection device have a free space of the voice message storage means equal to or less than a predetermined amount. Octopus with The features.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a configuration of an embodiment of a communication system according to the present invention, and a PHS is given as an example. The system uses multiple P
HS base stations CS1 to CSn and these PHS base stations CS
A connection device CN that houses 1 to CSn and connects to a public network
And a PHS terminal PS.

In the following description, PHS base station C
S indicates one of the PHS base stations CS1 to CSn. Further, the voice message storage center has the same configuration as the conventional one, and thus the description is omitted.

As shown in FIG. 2, the PHS base stations CS1 to CSn include a radio line control unit 11, a digital line control unit 12, a voice recording control unit 13, a storage unit 14, a call processing control unit 15, , A main control unit 16.

[0016] The radio line control unit 11 is operated by a PHS terminal P in response to an instruction from a call processing control unit 15 or a main control unit 16 which will be described later.
S performs outgoing / incoming call control via a wireless communication line with S,
A wireless communication link is established. Further, the wireless channel control unit 11 has a function of performing error correction processing on data received from the PHS terminal PS.

The digital line controller 12 responds to an instruction from the call processing controller 15 or the main controller 16 to connect to the connection device CN.
Outgoing / incoming / outgoing control for the digital communication line between the communication device and the connection device CN.

The voice recording control unit 13 accumulates a voice message received via a communication link established by the digital line control unit 12 in a voice message storage unit 14a described below in response to an instruction from the main control unit 16. Recording control, control for playing back stored voice messages, detection of free space, and the like.

The storage unit 14 uses a semiconductor memory such as a ROM or a RAM as a recording medium. The recording medium stores a control program of the main control unit 16 and various control data, which will be described later, and an input of a voice message. A control data storage unit (not shown) for storing voice guidance data for prompting the user and a voice message storage unit 14a for storing voice messages from callers.

The call processing control section 15 controls the radio line control section 11 and the digital line control section 12 in accordance with an instruction from the main control section 16 to perform a control relating to a normal incoming and outgoing call.

The main control unit 16 includes, for example, a microcomputer, and controls the respective units constituting the PHS base station CS as described above, and controls the connection between the PHS terminal PS and a connection device CN, which will be described later, and controls the handover. And storage control of voice messages.

In addition to the normal control functions related to communication and voice message storage, the main control unit 16 further includes a link holding control means 16a and a message transfer link opening for performing proxy storage control of voice messages. Control means 1
6b, an inter-link connection control unit 16c, a message reception link establishment control unit 16d, and a message proxy storage control unit 16e.

When the voice message from the caller is stored in the voice message storage unit 14a, the link holding control unit 16a transmits the voice message when the free space of the voice message storage unit 14a is less than a predetermined amount. It controls the digital line control unit 12 so as to maintain a communication link established with the user.

Message transfer link establishment control means 16b
Is stored in the voice message storage unit 14a when storing the voice message from the caller in the voice message storage unit 14a.
When the free area is less than or equal to a predetermined amount, the digital line control unit 12 makes a call with proxy recording request information, and controls to newly open a communication link for message transfer.

The link-to-link connection control means 16c controls the digital line control unit 12 to control the communication link held by the link holding control means 16a and the communication link established by the message transfer link establishment control means 16b. Is connected, and the voice message sent via the held communication link is transferred to the connection destination of the communication link established by the message transfer link establishment control means 16b.

Message receiving link establishment control means 16d
Controls the digital line control unit 12 to respond to the incoming call when there is an incoming call accompanied by the proxy recording request information when the free space of the voice message storage unit 14a is equal to or more than a predetermined amount. This control is performed to establish a communication link with the call originator of the call.

The message proxy storage control unit 16e controls the voice recording control unit 13 to store the voice message sent via the communication link established by the message reception link establishment control unit 16d. Is to be accumulated.

Next, the operation of the PHS base station CS will be described. Here, with reference to the flowcharts shown in FIG. 3 to FIG. 5, the description will be made focusing on the proxy accumulation control of the voice message.

First, as shown in step 301 of FIG. 3, the PHS base station CS sets the main control unit 16 to the connection device CN.
And waits for an incoming call signal from the digital communication line. Eventually, when an incoming call signal arrives from the connection device CN, the call processing control unit 15 detects the
6 and the process proceeds to step 302.

Then, in step 302, the message receiving link establishment control means 16d determines whether or not the incoming call signal includes the substitute recording request information. If the incoming call signal includes proxy recording request information, the process proceeds to a voice message proxy storage process shown in FIG. 5 described below. On the other hand, if the proxy recording request information is not included, the process proceeds to step 303.

In step 303, the main controller 16 notifies the radio line controller 11 of the subscriber number obtained from the incoming call signal. On the other hand, the radio line controller 11 transmits a call signal to the PHS terminal PS having the above subscriber number to make a call, and proceeds to step 304.

In steps 304 and 305, a response from the PHS terminal PS called in step 303 is awaited. Here, when a response is received from the PHS terminal PS, a response signal is sent to the connection device CN as a normal connection process, and the radio line control unit 11 and the digital line control unit 12 are connected. P that responded
The HS terminal PS is set to a state where communication is possible.

On the other hand, if there is no response from the PHS terminal PS even after a certain period of time has elapsed, the process proceeds from step 305 to step 306. In step 306, the main control unit 16 controls the digital line control unit 12 to send a response signal to the connection device CN to establish a communication link with the connection device CN, and proceeds to step 307. At this time, the connection device CN is connected as described later (FIG. 7).
Step 706), after establishing a communication link with the calling party, establishes a communication link between the PHS base station and the calling party.

In step 307, the main control unit 16 inquires of the voice recording control unit 13 whether or not the voice message storage unit 14a has a free space of a predetermined amount or more. In response to this inquiry, if there is a response that there is a free space equal to or more than a predetermined amount, the process proceeds to step 308. If there is a response that there is no free space, voice message proxy storage shown in FIG. Move to request processing.

In step 308, the caller is notified in the storage unit 14 via the communication link with the connection device CN established in step 306 that "I cannot answer the telephone now. Please input a message later. "And the like, and reproduce and transmit voice guidance for prompting input of a voice message.

In step 309, the main control unit 16 instructs the voice recording control unit 13 to record a voice (voice message) from the caller. On the other hand, the voice recording control unit 13 stores the voice message in the voice message storage unit 1.
Start recording on 4a.

Then, in step 310, step 3
09, the elapsed time from the start of recording of the voice message is monitored, and when a certain time has elapsed, the process proceeds to step 311.
At the same time as the recording operation is finished, the communication link with the caller is disconnected, and the process ends.

Next, the message proxy storage request processing will be described with reference to FIG. In this process, first, in step 401, the link holding control means 16a controls the digital line control unit 12 so that the communication link (communication link with the caller; 307) and the process proceeds to step 402.

In step 402, the message transfer link opening control means 16b controls the digital line control unit 12 to make a call to the connection device CN, and the process proceeds to step 403. It should be noted that the outgoing call signal transmitted by this outgoing call process is accompanied by substitute recording request information.

In steps 403 and 404, the main control unit 16 monitors a response from the digital communication line, and if a response is notified from the digital line control unit 12, the process proceeds to step 405. On the other hand, if there is no response after a certain period of time, step 404
Then, the process proceeds to step 408 described later.

In step 405, the message transfer link establishment control means 16b controls the digital line control unit 12 to establish a communication link with the other party who responded in step 403, and proceeds to step 406.

In step 406, the inter-link connection control means 16c controls the digital line control section 12 so that the communication link held in step 401 and the
Interconnects with the communication link established in step 4
Shift to 07. The voice message input by the caller through this connection is transferred to the connection destination of the communication link established in step 405 via the PHS base station.

In step 407, the main controller 16 causes the digital line controller 12 to monitor whether any of the two communication links connected in step 406 has been disconnected. Here, when disconnection is detected from any of the communication links, the process proceeds to step 408 to perform disconnection processing of the two communication links.

Next, the message proxy storage process will be described with reference to FIG. In this process, first, in step 501, the main control unit 16 inquires of the voice recording control unit 13 whether or not the voice message storage unit 14a has a free area of a predetermined amount or more. In response to this inquiry, if the response is that there is a free space equal to or greater than a predetermined amount, the process proceeds to step 502, and if the response is that there is no free space, the process proceeds to step 508 described below.

In step 502, the message reception link opening control means 16d controls the digital line control unit 12 to respond to the incoming call, and the process proceeds to step 503. Then, in step 503, the PHS base station waits for a response to the response in step 502, and upon confirming the response, shifts to step 504.

In step 504, the message receiving link establishment control means 16d further activates the digital line control unit 1.
2 to perform control for establishing a communication link with the caller of the incoming call, and then proceeds to step 505.

In step 505, as in step 308, the voice guidance prompting the caller of the incoming call to record a voice message stored in the storage unit 14 is reproduced and transmitted, and the process proceeds to step 506. .

In step 506, the message proxy storage control unit 16e controls the voice recording control unit 13 to instruct recording of the voice message sent from the caller.
On the other hand, the voice recording control unit 13 starts recording the voice message in the voice message storage unit 14a.

Then, in step 507, step 5
06, the elapsed time from the start of recording of the voice message is monitored.
At the same time as the recording operation is finished, the communication link with the caller is disconnected, and the process ends.

Next, the configuration of the connection device CN will be described. As shown in FIG. 6, the connection device CN includes a digital line control unit 21, a wired line control unit 22, a call processing control unit 23, and a main control unit 24.

The digital line control unit 21 receives a PHS signal in response to an instruction from a call processing control unit 23 or a main control unit 24 described later.
It performs outgoing / incoming control for a digital communication line with the base station CS, establishes a communication link with the PHS base station CS, and transmits and receives digital communication signals.

The wired line control unit 22 accommodates a line of a public network such as an ISDN network (hereinafter, referred to as a public line), and transmits a call to the public line according to an instruction from the call processing control unit 23 or the main control unit 24. It performs incoming call control and establishes a communication link with a communication partner on the public network.

The call processing control unit 23 controls the digital line control unit 21 and the wired line control unit 22 in accordance with an instruction from the main control unit 24 to perform control related to a normal outgoing / incoming call.

The main control unit 24 includes, for example, a microcomputer, controls the respective units constituting the connection device CN as described above, and controls the connection between the PHS base station CS and the communication partner on the public network. Is performed.

In addition to the normal control functions relating to such communication, the main control unit 24 newly controls the PHS base station CS as a control means for performing proxy storage control of voice messages. A link opening control unit 24a is provided.

The inter-base-station link establishment control means 24a, when receiving a call accompanied by proxy recording request information from the PHS base station CS accommodated by the own device, sets the digital line control unit 2
1 to transmit a call signal with proxy recording request information to another PHS base station CS accommodated in the own device,
A communication link is opened between the PHS base station CS that responds to the call and the PHS base station CS that has made the call.

Next, the operation of the connection device CN will be described with reference to the flowcharts shown in FIGS.
First, the main control unit 24 waits for an incoming call signal from the accommodated PHS base station CS in step 701 and waits for an incoming call signal from the public line in step 702.

When a call signal arrives from the accommodated PHS base station CS, the process shifts to a call process shown in FIG.
In the following description, the PHS transmitting the call signal will be described.
The base station CS is called a calling PHS base station CSa. on the other hand,
When an incoming call signal arrives from the public line, the call processing control unit 2
3 detects this and notifies the main control unit 24,
Shift to 03. In step 703, the main control unit 24 controls the call processing control unit 23 to accommodate the PHS base station C
An incoming call signal is sent to S to make a call, and the process proceeds to step 704.

In steps 704 and 705, the PH called in step 703 for a certain period of time.
It waits for a response from the S base station CS. Where PH
If there is a response from the S base station CS, step 706
Move to

In step 706, a response signal is sent to the caller on the public network, a communication link is opened between the PHS base station CS and the caller, and the process ends. On the other hand, if there is no response from the PHS base station CS even after the fixed time has elapsed, the process ends from step 705.

When the process proceeds to the calling process shown in FIG. 8, first, in step 801, the inter-base station link establishment control means 24 a checks whether the calling signal includes proxy recording request information. It is determined whether or not.

If the call signal includes the substitute recording request information, the process proceeds to step 802. On the other hand, if the proxy recording request information is not included, the call is a normal call from the PHS terminal PS through the PHS base station CSa. It connects to the line control unit 22 and sends the outgoing call signal to the public network.

In step 802, the inter-base-station link establishment control means 24a controls the digital line control unit 21 to transmit a call signal with proxy recording request information to the PHS base station CS accommodated in the own apparatus. , To step 803.

In steps 803 and 804, the PH called in step 802 for a certain period of time.
It waits for a response from the S base station CS. Here, if there is a response from the called PHS base station CS, the process proceeds to step 805. In the following description, step 8
The PHS base station CS responding at 03 is called a called PHS base station CSb.

On the other hand, even if a certain time has passed, the above PHS
If there is no response from the base station CS, step 8
08. At step 805, the inter-base-station link establishment control means 24a controls the call processing control section 23 to send a response signal to the calling PHS base station CSa and the called PHS base station CSb.
Establishes a communication link with each base station and proceeds to step 8
Shift to 06.

In step 806, the inter-base-station link establishment control means 24a controls the digital line control unit 21 so that the communication link established between the calling PHS base station CSa and the called PHS base station CSb is controlled. The connection is established with the communication link established during the period, and the process proceeds to step 807.

In step 807, the main control unit 24 connects to the digital line control unit 21
One of the two communication links is monitored for disconnection. If disconnection is detected from any of the communication links, the process proceeds to step 808 to perform disconnection processing of the two communication links.

Next, with reference to FIG. 9 and FIG. 10, in the radio communication system having the above configuration, the PHS base station CS1
When the PHS terminal PS1 located in the wireless zone of the PHS base station does not respond to the incoming call, the PHS base station CS2 issues a call instead of the PHS base station CS1 because the free storage area of the voice message storage of the PHS base station CS1 is small. The operation of recording a voice message from a caller will be described.

From the public network to the connection device CN, the PHS terminal P
When an incoming call signal addressed to S1 arrives (S901), the connection device CN sends an incoming call signal to the PHS base station CS1 to make a call (S902).

On the other hand, PHS base station CS1 transmits an incoming call signal to PHS terminal PS1 of the subscriber number included in the incoming call signal to make a call (S90).
3). Eventually, even if a certain time has passed, the PHS terminal PS1
If there is no response, the PHS base station CS1 sends a response signal to the connection device CN instead of the PHS terminal PS1 (S904). On the other hand, the connection device CN sends a response signal to the caller to open a communication link between the caller and the PHS base station CS1 (S905).

When there is no free space equal to or larger than the predetermined amount in the voice message storage unit 14a, the PHS base station CS1 keeps the communication link established with the caller and connects to the connection device CN. Then, a call signal with proxy recording request information is transmitted to the server (S906).

On the other hand, the connection device CN transmits a call signal with proxy recording request information to the PHS base stations CS2 to CSn accommodated in the connection device CN (S907). Thereafter, upon receiving a response from the PHS base station CS2 having a free space equal to or more than a predetermined amount in the voice message storage unit 14a (S908), the connection device CN receives the PHS base stations CS1 and CS2.
A communication link is opened with the HS base station CS2, and these communication links are connected (S909 to S91).
1).

On the other hand, the PHS base station CS 1
When a new communication link (S909) is established with N, this communication link is connected to the held communication link with the caller. Thereby, as shown by the dashed line in FIG. 10, a communication link (hereinafter, referred to as a proxy storage link) of the caller-PHS base station CS1-connection device CN-PHS base station CS2 is established (S91).
2).

When the proxy storage link is established in this way, the PHS base station CS2 reproduces and transmits voice guidance for prompting the caller to record a voice message through the proxy storage link (S913). .

On the other hand, the caller sends a voice message through the proxy storage link, and the voice message is stored in the voice message storage unit 14a of the PHS base station CS2.
(S914).

As described above, in the communication system having the above configuration, when the PHS terminal PS does not respond to the incoming call and records the voice message from the caller to the PHS base station CS1, the voice message is transmitted. If there is not enough free space in the voice message storage unit 14a to be recorded, the PHS base station C
Instead of S1, another PHS base station CS2 records a voice message.

Therefore, according to the communication system having the above-described configuration, even if a request for storing a new voice message is issued in a state where the remaining area of the PHS base station CS for storing the voice message is insufficient, another PHS is required. The voice message from the caller can be stored at the base station CS.

Therefore, even in a PHS base station installed in a high traffic area, there is no need to increase the capacity of a storage unit for storing voice messages, and a voice message service can be reliably provided to users. Can be provided. It goes without saying that various modifications can be made without departing from the spirit of the present invention.

[0079]

As described above, according to the present invention, for example, when the first wireless base station device records a voice message from a caller in the voice message storage unit, the free storage area of the voice message storage unit is used. Is less than or equal to a predetermined amount, the first wireless base station apparatus and the connection apparatus, via their own apparatuses, respectively, provide the caller and the second wireless base station apparatus having a sufficient free storage area in the voice message storage unit. A communication link is established between the first wireless base station and the second wireless base station instead of the first wireless base station.

Therefore, according to the present invention, even if a request for storing a new voice message occurs when the remaining voice message storage area of the radio base station apparatus is insufficient, the voice message service is provided to the user. And a communication system capable of reliably performing the communication.

[Brief description of the drawings]

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

FIG. 2 is a functional block diagram showing a configuration of a PHS base station of the communication system shown in FIG.

FIG. 3 is a flowchart for explaining the operation of the PHS base station shown in FIG. 2;

FIG. 4 is a flowchart for explaining a message proxy storage request processing operation of the PHS base station shown in FIG. 2;

5 is a flowchart for explaining a message proxy storage processing operation of the PHS base station shown in FIG. 2;

6 is a functional block diagram showing a configuration of a connection device of the communication system shown in FIG.

FIG. 7 is a flowchart for explaining the operation of the connection device shown in FIG. 6;

FIG. 8 is a flowchart for explaining a call processing operation of the connection device shown in FIG. 6;

FIG. 9 is a sequence diagram for explaining an operation in which another PHS base station substitutes a voice message from a caller for recording;

FIG. 10 is a diagram for explaining a communication link established when another PHS base station records a voice message on behalf of a caller by proxy.

[Explanation of symbols]

 CS, CS1 to CSn: PHS base station CN: Connection device PS: PHS terminal 11: Radio line control unit 12, 21, Digital line control unit 13: Voice recording control unit 14: Storage unit 14a: Voice message storage unit 15, 23 ... call processing control units 16, 24 ... main control unit 16a ... link holding control means 16b ... message transfer link establishment control means 16c ... link connection control means 16d ... message reception link establishment control means 16e ... message proxy accumulation control means 22 ... Wired line control unit 24a ... link establishment control means between base stations

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Kazuhiro Ichiichi 3-1-1 Asahigaoka, Hino-shi, Tokyo Inside the Toshiba Hino Plant Co., Ltd.

Claims (7)

[Claims] 1. A mobile communication terminal comprising: a wireless base station device connected to a mobile communication terminal via a wireless communication line; and a connection device that accommodates a plurality of the wireless base station devices and connects to a public network. In a communication system in which the radio base station apparatus records a voice message from a caller in a voice message storage unit when not responding to an incoming call, the radio base station apparatus transmits a voice message from the caller. A communication link holding unit configured to hold a communication link established with the caller when an empty storage area of the voice message storage unit is equal to or less than a predetermined amount when recording in the voice message storage unit; When recording a voice message from a caller in the voice message storage unit, if the free storage area of the voice message storage unit is equal to or less than a predetermined amount, the voice message is accompanied by substitute recording request information. A message transfer link opening means for making an outgoing call to the connection device to open a new communication link; and a voice message sent by the caller via the communication link held by the communication link holding means. Message transfer means for transferring to a connection destination of the communication link established by the transfer link establishment means, and when there is an incoming call accompanied by the proxy recording request information when the free storage area of the voice message storage unit is a predetermined amount or more. A message receiving link opening means for opening a communication link with the caller of the incoming call in response to the incoming call, and a communication link established by the message receiving link opening means. Voice message proxy storage means for storing an incoming voice message in the voice message storage unit; When a call with the proxy recording request information is received from the radio base station apparatus to be accommodated, a call with the proxy recording request information is made to another radio base station apparatus that the radio base station apparatus accommodates. A communication system comprising inter-base-station link opening means for opening a communication link between a radio base station apparatus that responds to a call and a radio base station apparatus that has made the call. 2. The communication system according to claim 1, wherein the communication between the mobile communication terminal and the radio base station apparatus is TDMA-TDD (Time Divisio).
n PHS (Personal Handyphon) connected using a Multiple Access-Time Division Duplex (Wireless Communication) system
e system). 3. A communication system comprising: a base station device connected to a wireless communication terminal via a wireless communication line; and a connection device for accommodating a plurality of the base station devices and connecting to a public network. In a communication system capable of providing a voice message service, a voice recording a voice message from a caller when the base station device sends an incoming signal to the communication terminal and the communication terminal does not respond. When the free space of the message storage means and the voice message storage means is equal to or less than a predetermined amount, the base station apparatus and the connection apparatus each communicate via their own communication link between the caller and another base station apparatus. Means for establishing a voice message storage means and a base station device having a free space of a predetermined amount or less and the connection device transferring a voice message from a caller to the other base station device. A communication system comprising: 4. The communication system according to claim 3, wherein said another base station has a voice message storage unit having a free area equal to or larger than a predetermined amount. 5. When recording a voice message from the caller in the voice message storage means, if the free space of the voice message storage means is equal to or less than a predetermined amount, the base station apparatus transmits the voice message to the connection means. 4. The communication system according to claim 3, wherein a call is made with proxy recording request information. 6. The connection device, in response to a call with the proxy recording request information from a base station device, making a call with the proxy recording request information to the another base station. The communication system according to claim 3, wherein: 7. A communication apparatus comprising: a first device connected to a communication terminal via a communication line; and a connection device for accommodating a plurality of the first devices and connecting to a fixed network. In a communication system capable of providing a voice message service, if a first device sends an incoming signal to a communication terminal and the communication terminal does not respond, a voice message from a caller is recorded. A voice message storage unit, wherein when the free space of the voice message storage unit is equal to or less than a predetermined amount, the first device and the connection device respectively communicate between themselves and the other first device via their own devices; Means for establishing a communication link, and a first device having a free space of the voice message storage means equal to or less than a predetermined amount and the connecting device transfer a voice message from a caller to the other first device. Means to do A communication system, comprising: