JPH05183955A - Call control system in radio telephone system - Google Patents

Abstract

PURPOSE:To obtain a call control system capable of eliminating a position registration operation before a call operation in a radio telephone system which provides radio service in plural radio zones. CONSTITUTION:When the call operation is performed by a ratio telephone set RTEL3-1, a position confirmation signal and a level report requesting signal designating a ratio zone number sequentially are transmitted. Connection equipment CE2-1, CE2-3 capable of receiving the position confirmation signal among the connection equipments which cover radio zones individually measure the reception level of the position confirmation signal, and transmit a measured value and a level reporting signal designating a speech channel used for communication and its own ratio zone number. The radio telephony set RTEL3-1 receiving the signal, after transmitting a call signal designating the radio zone number of the connection equipment from which the maximum reception level is reported, switches the channel to a designated speech channel, and the connection equipment CE2-3 receiving the call signal designating its own radio zone number switches the channel to the speech channel designated by itself.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a call control system suitable for a medium-capacity wireless telephone device having a relatively small number of wireless zones for performing wireless service.

[0002]

2. Description of the Related Art As one type of radio telephone device, one or a plurality of radio telephones, a main device for controlling connection between one line or a plurality of lines for an outside line or connection for an extension line, and a plurality of units for performing a wireless service. There is proposed a radiotelephone device including at least one radiotelephone set in each of the radio zones of the device and a connection device that performs a wireless connection with a radiotelephone used in the radio zone of the device under the control of the main device. ing.

In such a conventional call connection in a radio telephone device, when a user makes a call operation to the radio telephone, the radio zone number stored in the radio telephone is added. Of the connection device installed in each wireless zone, the connection device that receives the above-mentioned transmitted call signal and the wireless zone number included in the received connection signal matches the own wireless zone number Is notified to the wireless telephone that has transmitted the call signal, the self-connection device itself is switched to the call channel, and the wireless telephone side is also switched to the notified call channel.

Conventionally, since the above-mentioned calling control system is adopted, at least at the time of calling operation, the wireless zone number stored in the wireless telephone matches the wireless zone in which the wireless telephone exists. Must have been updated to. Therefore, in the conventional wireless telephone device, the following location registration processing, which is used in a large-capacity wireless telephone device having a large number of wireless zones, is performed.

Now, the number of wireless zones is 4, and the connection devices CE2-1, CE2-2, CE2-3, CE2 are provided for each.
-4 is installed, and a certain radio telephone RTEL3-1
Is moving from the wireless zone in which the connection device CE2-1 is installed to the wireless zone in which the connection device CE2-3 is installed. In such a case, when the user of the radio telephone RTEL3-1 determines that he / she has moved to another radio zone, he / she performs a position registration operation before making a call. As a result, as shown in FIG.
A location registration signal is transmitted from L3-1.

Upon receiving the position registration signal, each of the connection devices CE2-1 to CE2-4 measures the received electric field level and, as shown in FIG. 8, sends the position registration signal including the measured received electric field level information. It is transmitted to the main device ME1. In the example of the figure, the connection devices CE2-1, CE2-2, CE2-3
From CE2-4, 20 dBμV, 10 dBμV, 40d
The position registration signal including the measured values of B μV and 10 dBμV is transmitted to the main device ME1.

Next, the main device ME1 is connected to each connection device CE2-.
1 to CE2-4, the received electric field levels indicated by the position registration signals are compared, the connection device having the highest received electric field level is selected, and the position registration response signal is sent to the selected connection device. The position registration end signal is transmitted to the connection devices other than the above. In the case of the above-described example, as shown in FIG. 8, since the received electric field level measurement value from the connection device CE2-3 is the highest, the location registration response signal is transmitted to the connection device CE2-3, and the other connection devices are not. CE2-1, CE2
The location registration end signal is transmitted to the CE-2 and CE-2-4.

Each of the connection devices CE2-1 to CE2-4 proceeds to a standby process when a position registration end signal is received as a response to the position registration signal, and transmits a position registration signal when a position registration response signal is received. Wireless phone RTEL3
-1 transmits a position registration response signal including the wireless zone number of the self-connecting device. Therefore, in the example described above, FIG.
The connection device CE2-3 is connected to the wireless telephone RTEL as shown in FIG.
The location registration response signal including the wireless zone number “3” is transmitted to 3-1.

Radio telephone R which has received the location registration response signal
TEL3-1 has a wireless zone number "3" included in it.
Is stored inside. The stored wireless zone number is included in the calling signal as described above when the user subsequently makes a calling operation.

[0010]

As described above, the conventional wireless telephone device determines whether the user has moved to another wireless zone, and if so, performs a location registration operation and then makes a call. It was necessary to operate and the operability was poor.
Further, there is also a problem in that a medium-capacity wireless telephone device having about four wireless zones needs location registration processing similar to that of a large-capacity wireless telephone device, which requires a development period for its scale.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a call control system in a radiotelephone device that can eliminate the need for location registration operation and location registration processing. is there.

[0012]

In order to achieve the above object, the present invention provides a wireless telephone, a main unit, and a wireless telephone which is controlled by the main unit and within the wireless zone where the own unit is located. In a call origination control method in a wireless telephone device including a connection device for making a connection, wherein at least one connection device is arranged in each of a plurality of wireless zones,
When making a call request, the wireless telephone is provided with means for transmitting a position confirmation signal and a level report request signal in which wireless zone numbers are specified in order, and when the position confirmation signal is received, the reception level is measured and the measured value is The connection device is provided with means for transmitting a level report signal including call channel information and its own wireless zone number in response to reception of a level report request signal specifying its own wireless zone number, and the wireless telephone transmits By receiving the level report signal as a response to the level report request signal, the call signal specifying the wireless zone number included in the level report signal that has reported the maximum reception level measurement value is transmitted and A connection device that has switched to a communication channel specified by the communication channel information included in the level report signal and transmitted the level report signal By receiving a call signal specifying the own radio zone number, configured to switch the speech channel which is notified by said level report signal.

Further, the connection device waits when the level report request signal is not received within a predetermined time after receiving the position confirmation signal and when the calling signal is not received within the predetermined time after transmitting the level report signal. I am trying to shift to processing.

[0014]

In the call origination control method for the radiotelephone device of the present invention, when the user of the radiotelephone device makes a call origination operation using the keyboard or the like, the position confirmation signal and the radio zone number are designated in order from the radiotelephone device. The level report request signal and the level report request signal are transmitted in that order. The transmitted position confirmation signal is received at the maximum reception level by the connection device closest to the wireless telephone, and the reception level becomes smaller as the connection device is farther away.
In some cases, it will not be received.

In the connection device that can receive the position confirmation signal,
When the reception level is measured and a level report signal including the measured value, call channel information and own wireless zone number receives a level report request signal specifying the own wireless zone number from the above wireless telephone. Send to.

Therefore, the radiotelephone can know the radio zone in which it is located by the radio zone number included in the level report signal which has reported the measured value of the maximum reception level, and the call in the level report signal. The channel information makes it possible to know the call channel to be switched. Therefore, the wireless telephone transmits a calling signal that specifies the wireless zone number included in the level report signal that has reported the maximum reception level measurement value, and specifies the call channel information included in the level report signal. Switch to the call channel you want to use. On the other hand, the connection device that has transmitted the level report signal switches to the communication channel notified by the level report signal by receiving the call signal specifying the wireless zone number of itself.

[0017]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 shows a configuration example of a wireless telephone device to which the present invention is applied.

The radiotelephone device of this example is a medium-capacity radiotelephone device that provides radio services for four radio zones Z1 to Z4, and a wired telephone line 171 for an outside line.
Main unit ME1 which is connected to the external line group L1 including the external lines and the external line and controls the connection with the internal line, and other overall system control, and a plurality of push buttons usable in any of the wireless zones Z1 to Z4. Type wireless phones RTEL3-1 to RTEL3-6 such as cordless phones
And a plurality of connecting devices CE2-1 to CE2-8 which are controlled by the main device ME1 connected by the connecting lines 161 to 168 included in the connecting line group L2 and wirelessly connect to the wireless telephones RTEL3-1 to RTEL3-6. It consists of and. Here, the connection devices CE2-1 and CE2-5 cover the wireless zone Z1, and the connection devices CE2-2 and CE2-6.
Covers the wireless zone Z2 and connects devices CE2-3 and C2
E2-7 covers the wireless zone Z3, and the connecting device CE2
-4 and CE2-8 cover radio zone Z4.
The main device ME1 performs the wireless zone Z1 as an initial operation.
Connecting device CE2-1, connecting device CE of wireless zone Z2
2-2, the connection device CE2-3 of the wireless zone Z3, and the connection device CE2-4 of the wireless zone Z4 are set to a standby state in which outgoing / incoming calls can be made and the remaining connection devices CE2-5 to CE2-.
When the connection device 8 in the standby state is used and the connection device 8 in the standby state is used, another connection device in the wireless zone that is paired with the connection device 8 is set in the standby state in which outgoing / incoming calls can be made.

Referring to FIG. 2, the main unit ME1 has external line interfaces 101 to 103 connected to an external line group L1 including wired telephone lines 171 to 173, and switches connected to these external line interfaces 101 to 103. 11
1 and the reserved sound source 151 connected to this switch 111
And connection device interfaces 121 to 128, external line interfaces 101 to 103, switch 111, connection device interfaces 121 to 128, and reserved sound source 15
1 includes a control unit 131 connected to 1 and a power source 141 that is connected to AC100V and supplies electric power to each unit, and the connection device interfaces 121 to 128 connect the connection devices CE2- to the connection lines 161 to 168 of the connection line group L2. 1-CE2
It is connected to -8. When connecting to an outside line,
Under the control of the control unit 131, the corresponding outside line interface and the corresponding connecting device interface are connected through the switch 111 to enable a call, and when the extension line is connected, the corresponding connecting device interface is switched between the corresponding connecting device interfaces.
1 can be connected to make a call.

Referring to FIG. 3, the connection device CE2-i.
(I = 1 to 8) are a hybrid 201 and a power source 204 connected to the main device ME1 by a connection line 20i, a transceiver 202 connected to the hybrid 201, an antenna 205 connected to the transceiver 202, and reception. Level determiner 207, hybrid 201, transceiver 20
2 and the control unit 2 connected to the reception level determiner 207
03 and.

Referring to FIG. 4, the radiotelephone RTEL3
-J (j = 1 to 6) indicates an antenna 307, a transceiver 301 connected to the antenna 307, a control unit 302, a microphone 303 and a speaker 304 connected to the transceiver 301, and a control unit 302. Display unit 3 connected
05, a keyboard 306 and a buzzer 310, and a battery 308 that supplies electric power to each unit. The calling operation can be performed by the keyboard 306, and the buzzer 310 sounds to notify the user of the incoming call. The call is made using the microphone 303 and the speaker 304.

FIG. 5 is a flow chart showing an example of a call origination connection operation executed by each wireless telephone, and FIG. 6 is a flow chart showing an example of a call origination connection operation executed by each connection device.
FIG. 7 is an operation time chart relating to call connection when the user of the radio telephone RTEL3-1 of FIG. 1 performs a call operation. Hereinafter, with reference to the drawings, the wireless telephone RTEL3
The operation of the call origination connection method of the present embodiment will be described with reference to the case where the call origination operation is performed at -1.

Control unit 302 of radio telephone RTEL3-1
Performs standby processing for determining whether or not an incoming call signal is received from the connection device and whether or not there is a call request at the own telephone in steps S1 and S2 of FIG. 5, and the use of the wireless telephone RTEL3-1 is performed. When a person performs a call operation on the keyboard 306 at time t1 in FIG. 7, the control unit 302
Detects that there is a call request (step S2), and turns on the transmission output (TX) at time t2 (step S2).
3), the position confirmation signal is transmitted from the transceiver 301 via the antenna 307 several times (step S4). When receiving the incoming call signal from the connection device, the wireless telephone RTEL3-1 shifts to the incoming call process (step S16).

Next, the control unit 302 of the radio telephone RTEL3-1 has a function of "1", "2", "3", every T3 seconds.
A level report request signal in which wireless zone numbers of "4" are designated in order is transmitted from the transceiver 301 via the antenna 307 (steps S5, S6, S7, S8, S9, S1).
0). As a result, the level report request signal designating the wireless zone number “1” is transmitted at time t3 in FIG. 7, the level report request signal designating the wireless zone number “2” is transmitted at time t4, and the wireless level report request signal is transmitted at time t5. The level report request signal designating the zone number “3” is transmitted, and the level report request signal designating the wireless zone number “4” is transmitted at time t6. In addition, the control unit 30 of the radio telephone RTEL3-1
In parallel with the transmission of the level report request signal, 2 determines whether or not the level report signal as a response to the level report request signal is received by the transceiver 301 (step S11), and the level report signal is received. Is received, the received electric field level included in the level report signal,
Information such as the designated call channel and wireless zone number is stored internally (step S12).

On the other hand, each of the connecting devices CE2-1 to CE2-3
The control unit 203 performs standby processing for determining whether or not the incoming call signal is received from the main device ME1 and whether or not the position confirmation signal is received from the wireless telephone in steps S21 and S22 of FIG. Here, as shown in FIG. 1, the radio telephone RTEL3-1 exists at a position where the radio zone Z1 and the radio zone Z3 overlap each other and is apart from the radio zones Z2 and Z3.
The position confirmation signal transmitted in step S4 of EL3-1 in FIG. 5 is received by the connection device CE2-1 of the wireless zone Z1 and the connection device CE2-3 of the wireless zone Z3.

When the control unit 203 of the connection devices CE2-1 and CE2-3 detects that the position confirmation signal is received by the transceiver 202 via the antenna 205 (step S).
22), the reception level determiner 207 is caused to measure the reception electric field level of the position confirmation signal. At this time, as shown in FIG. 7, the connection device CE2-1 has 20 dB.
The measurement result of μV was obtained, and it was 40 in the connection device CE2-3.
It is assumed that the measurement result of dB μV is obtained.

The connection devices CE2-1 and CE2-3 measure the received electric field level and, until T1 seconds elapse,
Waiting for the reception of the level report request signal designating its own wireless zone number (steps S24, S25, S2).
6, S27). Then, if the level report request signal with the matching wireless zone number cannot be received even after T1 seconds have passed, the process returns to step S21 to perform the standby process. When such a level report request signal is received, The transmission output is turned on (step S28), and a level report signal including the reception electric field level measured in step S23, the communication channel to be used, the own wireless zone number, etc. is transmitted and received by the transceiver 20.
2 is transmitted (step S29), and when the transmission is completed, the transmission output is turned off (step S30). Then, until T2 seconds elapse, a call signal specifying its own wireless zone number is waited for (steps S31, S32, S3).
3, S34).

Therefore, as described above, when the level report request signal of the radio zone number "1" is transmitted from the radio telephone RTEL3-1 at the time t3 in FIG. 7, the connection device CE2-.
In response to the reception, 1 transmits the output after turning on the transmission output at time t4 and transmitting the level report signal including the measurement result of 20 dBμV, the communication channel and the wireless zone number “1” as shown in FIG. Is turned off, and until T2 seconds elapse, a call signal designating its own wireless zone number "1" is waited for. Further, when the level report request signal of the wireless zone number "3" is transmitted from the wireless telephone RTEL3-1 at time t5, the connection device CE2-3 responds to the reception and at time t6 as shown in FIG. The transmission output is turned on, the transmission output is turned off after the level report signal including the measurement result of 40 dBμV, the communication channel and the wireless zone number “3” is transmitted, and until the time T2 seconds elapses, its own wireless zone number “ A call signal designating "3" is waited for.

As described above, the radio telephone RTEL3-1 stores the necessary information in step S12 when it detects the reception of the level report signal in step S11 of FIG. 5, so that the connection device CE2 operates as described above. -1, CE2
-3, when the level report signal is transmitted, the radio telephone R
The control unit 203 of the TEL 3-1 informs the control unit 203 of the level information signal received from the connection device CE 2-1 of the received electric field level of 20 dBμV, the communication channel information, the wireless zone number “1”, and the like received from the connection device CE 2-3. Information such as the received electric field level of 40 dBμV, the communication channel information, and the wireless zone number “3” in the report signal will be stored.

Control unit 302 of radio telephone RTEL3-1
After transmitting the required number of level report request signals,
As shown in, after waiting for T4 seconds (step S1
3), the wireless zone number corresponding to the highest received electric field level is selected from the received electric field levels stored in step S12, and the calling signal specifying the wireless zone number is transmitted from the transceiver 301 (step S14). .. Then, the connection device of the selected wireless zone number is switched to the designated communication channel (step S15). Therefore,
In the state where the above information is stored,
A call signal designating the wireless zone number "3" is transmitted, and switching to the call channel designated by the call channel information is performed.

When the call signal specifying the radio zone number "3" is transmitted from the radio telephone RTEL3-1, the connection devices CE2-1 and CE2 waiting for reception of the call signal.
-3, the connection device CE2-1 cannot receive the calling signal designating its own wireless zone number "1" within a predetermined time. Therefore, as shown in FIG. 7, step S2 is performed at time t8.
The process returns to 1 and the standby process is performed. On the other hand, since the connection device CE2-3 receives the call signal designating its own wireless zone number "3" within the predetermined time, as shown in FIG. 7, the call designated by the call signal at time t8. A call connection is made by switching to the channel (step S35).
The subsequent operation is similar to the conventional one.

[0032]

As described above, according to the present invention,
When the wireless telephone makes a call, the optimum wireless zone is checked, and the calling signal is sent to the connection device that covers that wireless zone, so whether the user himself moved to another wireless zone as in the past. Therefore, it is not necessary to perform the location registration operation before making the call operation, and the operability is improved. Further, since it is not necessary to support the location registration processing similar to that of the large capacity wireless telephone device in the medium capacity wireless telephone device of about four wireless zones, the development period can be shortened.

[Brief description of drawings]

FIG. 1 is a system block diagram showing a configuration example of a wireless telephone device to which the present invention is applied.

FIG. 2 is a block diagram showing a configuration example of a main device.

FIG. 3 is a block diagram illustrating a configuration example of a connection device.

FIG. 4 is a block diagram showing a configuration example of a wireless telephone.

FIG. 5 is a flowchart showing an example of a call connection operation performed by the wireless telephone.

FIG. 6 is a flowchart showing an example of a call origination connection operation executed by the connection device.

FIG. 7 is an operation time chart relating to call connection when a user of the radio telephone RTEL3-1 performs a call operation.

FIG. 8 is a time chart of a location registration operation performed by a conventional wireless telephone device.

[Explanation of symbols]

 ME1 ... Main device Z1 to Z4 ... Wireless zone CE2-1 to CE2-8 ... Connection device RTEL3-1 to RTEL3-6 ... Wireless telephone L1 ... Outer line group 171 to 173 ... Wired telephone line L2 ... Connection line group 161 ~ 168 ... Connection line

Front page continuation (72) Inventor Shin Saegusa 5-7-1, Shiba, Minato-ku, Tokyo NEC Corporation (72) Inventor Naoyasu Nishimura 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph Telephone Co., Ltd. (72) Inventor Shinji Kumataka 1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation (72) Inventor Hiroyuki Misawa 2-5-7 Koishikawa, Bunkyo-ku, Tokyo Meisei Electric Co., Ltd. (72) Inventor Ichiro Tamura 2-5-7 Koishikawa, Bunkyo-ku, Tokyo Meisei Electric Co., Ltd.

Claims (2)

[Claims] 1. A wireless telephone, a main device, and a connection device controlled by the main device and making a wireless connection with the wireless telephone within a wireless zone in which the own device is placed, each of the plurality of wireless zones being provided. In a call control method for a radiotelephone device in which at least one connection device is arranged, a means for transmitting a position confirmation signal and a level report request signal sequentially designating a radio zone number at the time of a call request are provided. A level report request signal that specifies the wireless zone number of the wireless telephone, measures the reception level of the position confirmation signal when receiving the position confirmation signal, and includes a level report signal including the measured value, call channel information, and the wireless zone number of the own. The connection device is provided with means for transmitting in response to reception of the level report signal, and the wireless telephone receives the level report signal as a response to the transmitted level report request signal. As a result, a call signal specifying the wireless zone number included in the level report signal that has reported the maximum received level measurement value is transmitted, and the call specified by the call channel information included in the level report signal A radiotelephone device that is switched to a channel, and the connection device that has transmitted the level report signal switches to the call channel notified by the level report signal by receiving a call signal that specifies its own radio zone number. Call control method in. 2. The connection device waits when the level report request signal is not received within a predetermined time after receiving the position confirmation signal and when the call signal is not received within a predetermined time after the level report signal is transmitted. The call origination control method in the wireless telephone device according to claim 1, wherein the processing shifts to processing.