JPH02220521A - Mobile communication system - Google Patents

Abstract

PURPOSE:To attain the display even when the arrival of an incoming call is disabled due to a worn-out battery by combining a small zone station and a large zone station, carrying a high call quantity locally to cover a broad area. CONSTITUTION:A 1st base station 13 has a large zone 19 and has a signal transmission function to a mobile station 19b. Moreover, 2nd base station 14a, 14b have small radio zones 18a, 18b and a function receiving or receiving a signal to/from the mobile station 19a. Moreover, the mobile station 19a sends/ receives a signal and has a display function of a reception message and a function inputting and outputting a voice. The signal is sent from the base stations 14a, 14b to the mobile station 19 to carry a high call quantity with the base stations 14a, 14b with a small radio zone and the radio zone 13 covers wider area. Even when the mobile stations 19a, 19b cannot receive a call because of the worn-out battery regardless of the residence in the radio zone 18 for a small zone station, only the display is left.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a communication system that includes, for example, a plurality of mobile stations, a plurality of base stations, and a control station that controls these base stations. The present invention relates to a mobile communication system in which calls are received.

[Conventional technology]

Conventionally, in mobile communication systems that cover a wide area, (a) multichannel access (
(b) A system that transmits with high power from one station, such as MCA) or pager (such a station is called a large zone station), and provides a wide service area; (b) a system that transmits at a medium level, such as a car phone (C
) There is a system in which multiple low-power base stations (referred to as small zone stations) are installed on the back of a multi-zone cordless telephone, and the service area is relatively small, but the call volume is as high as that of a landline telephone.

[Problem to be solved by the invention]

By the way, due to the increasing demand for mobile communications in recent years, there is a need for a mobile phone service for individuals that can locally carry a call volume equivalent to or higher than that of a multi-zone cordless phone and cover a wide area. There is. In order to realize such a service, the conventional method described above has the following problems.

In the method (a), since a single station covers a wide area, frequency usage efficiency is poor, and calls concentrated locally cannot be carried. Furthermore, when performing bidirectional communication, the mobile station also needs to transmit with high power, making it difficult to realize a portable mobile station.

In the method (b), like the method (a), the efficiency of frequency use is poor, and the locally concentrated traffic cannot be carried. In addition, it is costly because it requires complicated control, and is not suitable for individuals.

In method (C), the area per round is small, so many base stations are required to cover an area as wide as method (a), and transmission line costs. Therefore, it is difficult to cover all areas.

The present invention was created in consideration of these points, and aims to provide a hyperactive communication system that can carry a high call volume locally and cover a wide area. The purpose is

[Means to solve the problem]

1 i;'Jl Dish In order to achieve such an object, the mobile communication system according to claim 1 is a mobile communication system having a function of transmitting and receiving signals, a function of displaying received messages, and a function of outputting voice. a first base station with a large wireless zone that has the function of transmitting signals to mobile stations; a second base station with a small wireless zone that has the function of transmitting and receiving signals to and from the mobile stations; a control station that controls the second base station, and when the control station receives an incoming call to the mobile station, the first and second base stations send signals to the mobile station, and the mobile station It is configured to display messages or make calls.

``Precept 18'' The mobile communication system according to claim 2 is the mobile communication system according to claim 1, when the control station receives an incoming call to the mobile station,
The second base station transmits a signal and waits for a response from the mobile station, and if there is no response, the first base station transmits a message to the mobile station.

[For production]

The first base station has the function of transmitting signals to mobile stations and has a large wireless zone. Also,.

The second base station has a function of transmitting and receiving signals to and from mobile stations, and has a small wireless zone. In addition, the mobile station has functions for transmitting and receiving signals, displaying received messages, and inputting and outputting audio.

In the present invention, by transmitting signals from the first base station and the second base station to the mobile station, a high traffic volume can be carried by the second base station having a small wireless zone. The first base station with a large zone makes it possible to cover a wide area.

ii In the invention of claim 2, the message is transmitted from the first base station when there is no response from the mobile station to the signal transmitted from the second base station.

Similar to the mobile communication system of claim 1, the second base station can carry a high traffic volume, and the area that cannot be covered by the second base station is covered by the first base station.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

FIG. 1 shows the configuration of an embodiment of a communication system to which the mobile communication system of the present invention is applied.

In the figure, 10 is a line for connecting to a fixed network (not shown), 19a and 19b are mobile stations, 13 is a large zone station that covers a wide wireless zone and has only the function of transmitting signals to the mobile station 19; 14a.

14b is a small zone station that covers a narrow wireless zone and has the function of transmitting and receiving signals with the mobile station 19; 11 controls the connection between the base station 14 and the fixed network; and the mobile station 19. A control station having the function of controlling the base stations 13 and 14, 12 a wired transmission network connecting the base stations 13 and 14 and the control station 11, 15 a large zone station antenna for covering a wide area, 16a, 16b 17 represents a small zone station antenna for covering a narrow area, 17 represents a wireless zone of a large zone station, and 18a and 18b represent wireless zones of a small zone station.

The area including the wireless zone 17 of the large zone station and the wireless zone 18 of the small zone station is defined as the service area of this system. The small zone station's radio zone 18 may be included within the large zone station's radio zone 17, or it may be outside. The mobile station 19a is within the radio zone 18 of the small zone station and can communicate with the small zone station 14. The mobile station 19b is not within the radio zone 18 of the small zone station and can only receive signals from the large zone station 13.

FIG. 2 shows a detailed configuration of the control station 11 shown in FIG. 1.

In the figure, 20 is an interface with the fixed network, 21
22 is a switch circuit, and 22 is an interface 5 with the large zone station 13 or the small zone station 14. A memory 24 has the function of storing the small zone station 14 with which the mobile station 19 has registered its location, and the function of storing messages sent to the mobile station 19 from the fixed network side. A timer 25 measures the time elapsed since the signal was sent to the small zone station 14.

26 is a talkie, for example, a mobile station 1 to the fixed network side.
9 is not within the wireless zone 18 of the small zone station, and has functions such as prompting the mobile station 19 to input a message. Furthermore, 23 is a control device, which includes a switch circuit 21 and a memory 24 .
Timer 25. Controls talkie-26. It also has the ability to receive messages input from the fixed network side.

FIG. 3 shows a detailed configuration of the large zone station 13 shown in FIG.

In the figure, 30 is an interface with the control station 11;
31 is a wireless transmitter. Control station 1 at large zone station 13
The signal from 1 is transmitted wirelessly as is.

FIG. 4 shows a detailed configuration of the small zone station 14 shown in FIG.

In the figure, 40 is an interface with the control station 11;
41 is a wireless transceiver; 43 is a memory for storing base station numbers and communication channel numbers; and 42 is a control device for controlling the wireless transceiver 41 and memory 43.

A method for notifying the base station number to the small zone station 14 is, for example, a method in which the control station 11 notifies the small zone station 14 when it is started up.

As an example of the configuration of the wireless section, there is a method in which different frequencies are assigned to the large zone station 13 and the small zone station 14, and furthermore, a control channel common to all base stations and a communication channel different from each other are assigned to the small zone station 14. be. In this case, a method for notifying the call channel number to the small zone station 14 is, for example, a method in which the control station 11 notifies it when the small zone station 14 is activated.

FIG. 5 shows a detailed configuration of the mobile station 19 shown in FIG.

In the figure, 50 is an antenna, and 51 is a wireless transceiver, which includes a receiver capable of receiving signals from the large zone station 13 and the small zone station 14, and a transmitter that transmits the signal to the small zone station I4. Reference numeral 53 denotes an audio circuit that processes audio signals transmitted to and received from the small zone station 14. 54 is a display device that displays the caller number and message sent from the large zone station 13.

A memory 55 stores caller numbers and messages, and is used when displaying caller numbers and messages later. 52 is a control device, which includes a wireless transmitter/receiver 51 and an audio circuit 53.
1 display device 54. Controls memory 55. Further, 56 represents a microphone, and 57 represents a speaker.

As an example of a specific method of configuring the wireless transceiver 51, there are cases where the large zone station 13 and the small zone station 14 are received by different receivers, and where they are received by the same receiver. Furthermore, as shown in FIG. 12, as an example of the configuration of the mobile station 19, it is conceivable to configure the mobile station apparatus separately into a mobile station apparatus for a large zone station (a) and a mobile station apparatus for a small zone station (b).

In FIG. 6, a call is received from the fixed network side to the mobile station 19, and the mobile station I9 receives a call from the large zone station 13 and the small zone station 14 at the same time.
FIG. 3 is a diagram illustrating an example of the signal flow and the operation of each station from when an incoming call signal is transmitted to a station until a call becomes possible. In this example,
It is assumed that the mobile station number and caller number are received from the fixed network side when a call is received. (a) in the figure shows a case where a mobile station exists within the wireless zone 18a of a small zone station, like the mobile station 19a shown in FIG. (b) is the mobile station 19
This is a case where the mobile station is within the radio zone 17 of the large zone station but not within the radio zone 18b of the small zone station, as shown in b.

The example shown in FIG. 3(a) will be explained below. Control station 11
When there is an incoming call, the control device 23 receives the mobile station number. Next, the control device 23 reads the mobile station 1 from the memory 24.
9a searches for the small zone station 14a that has registered its location, and transmits the incoming signal 1 to this small zone station 14a and the large zone station 3.
60 is sent. The incoming signal 160 has a frame structure as illustrated in FIG. In this example, a case is considered in which the control station 11 receives the caller number from the fixed network side, so the caller number 83 is included in the incoming signal 160. When the control device 23 sends out the incoming call signal 160, it activates the timer 25 to measure the time elapsed since the signal was sent.

For example, when the large zone station 13 receives the incoming signal 160 from the control station 11, it transmits the paging signal 62 wirelessly without changing the frame shape.

Therefore, the calling signal 62 takes the frame structure shown in FIG.

The small zone station 14a adds its own base station number and communication channel number to the incoming signal 160 received from the control station 11,
An incoming signal 1161 is sent out wirelessly.

The incoming signal I[61 has a frame structure as illustrated in FIG. After sending the incoming signal 1161, the small zone station 14a
enables reception of the wireless channel of the call channel number.

Alternatively, it may be possible to receive the message all the time.

Mobile station 19a receives a signal from large zone station 13 and a signal from small zone station 14a. When the mobile station 19a receives the incoming signal 61 from the small zone station 14a, it switches to the channel of the communication channel number indicated in the incoming signal 61. Next, the incoming call response signal 163 is transmitted to the small zone station 14a.
Send to.

Incoming call response signal at small zone station 14a! 63, it sends an incoming call response signal [64 to the control station 11.

When the control station 11 receives the incoming call response signal (64), it controls the connection with the identified network and becomes able to make a call.

Next, the example shown in FIG. 4(b) will be explained. Control station 11
When there is an incoming call, the control device 23 receives the mobile station number. The control device 23 of the control station 11 searches the memory 24 for the small zone station 19b with which the mobile station 19b has registered its location, and sends an incoming signal 160 to the small zone station 19b and the large zone station 13. The control device 23 receives the incoming signal 160
When the signal is sent, the timer 25 is activated to measure the time elapsed since the signal was sent.

When the large zone station 13 receives the incoming signal 160 from the control station 11, it transmits the paging signal 62 wirelessly without changing the frame shape.

The small zone station 14b adds its own base station number and communication channel subnumber to the incoming signal 160 received from the control station 11, and wirelessly transmits an incoming signal I[61. Incoming signal 116
1, the small zone station 14b becomes capable of receiving the wireless channel of the communication channel number. Alternatively, it may be possible to always receive the information.

The mobile station 19b moves to the radio zone 18 of the small zone station.
Since the incoming signal I[61 from the small zone station 19b is transmitted from the small zone station 19b, the incoming signal I[61] cannot be received. However, since the caller is within the wireless zone 17 of the large zone station and the calling signal 62 can be received, it is possible to know that there is an incoming call and the caller's number.

In the control station 11, a control device 23 monitors a timer 25. If the incoming call response signal 1164 does not arrive for a certain period of time,
The control device 23 determines that the mobile station 19b has moved and left the radio zone 18b of the small zone station, and notifies the caller that the mobile station 19b is absent, for example, using the talkie 26. For example, if a message is to be sent to the mobile station 19b, the talkie 26 is used to send a message to the mobile station 19b.
It is also possible to prompt the user to input a message. In this case, when a message is input, the message signal 165
, the large zone station 13 wirelessly notifies the mobile station 19b of the message or that the message has arrived. In the latter case, the control device 23 stores the input message in the memory 24, and when there is an inquiry from the mobile station 19b, this message is notified from the small zone station 14 that made the inquiry. The message signal 165 has a frame structure shown in FIG.
A reference number, code, etc. for referring to the message may be used. Since the message signal 1166 is transmitted from the large zone station 13, it has the same frame structure as the message signal I65.

In order for the mobile station 19b to refer to the message, for example, the mobile station 19b makes a call from the small zone station 14 to a specific number, and refers to the message using the reference number, code, etc. indicated in the message 113. There is a way.

In FIG. 7, an incoming call is received from the fixed network side to the mobile station 19, and the incoming signal is first transmitted from the small zone station 14 to the mobile station 19.
FIG. 4 is a diagram showing an example of the signal flow and the operation of each station when a message or the like is transmitted from the large zone station 13 only when there is no response. In this example, it is assumed that a mobile number and a caller number are received from the fixed network side when a call is received. (a) in the figure shows a case where a mobile station exists within the wireless zone 18a of a small zone station, like the mobile station 19a shown in FIG. (b) is a case where the mobile station 19b is located within the wireless zone 17 of the large zone station but does not exist within the wireless zone 18b of the small zone station.

The control station 11 will be explained below regarding the example shown in FIG.
When there is an incoming call, the control device 23 receives the mobile station number. The control device 23 searches the memory 24 for the small zone station 14a with which the mobile station 19a has registered its location, and sends the incoming signal 160 only to this small zone station 14a. When the control device 23 sends out the incoming call signal 160, it activates the timer 25' to measure the time since the signal was sent.

The small zone station 14a adds the base station number and call channel number of its own station to the incoming signal 160 received from the control station 11, and wirelessly sends out an incoming signal 1161 as a 0 incoming signal 116.
1 transmission, the small zone station 14a becomes capable of receiving the wireless channel of the communication channel number. Alternatively, it may be possible to always receive the information.

The mobile station 19a receives an incoming signal 161 from the small zone station 14a.
When it receives the call, it switches to the channel with the call channel number indicated in the incoming signal 1161.

Next, the incoming call response signal 163 is transmitted to the small zone station 14a.

When the small zone station 14a receives the incoming call response signal 163, it sends out an incoming call response signal 164 to the control station 11.

When the control station 11 receives the incoming call response signal 1164, it performs connection control with the identified network side and becomes able to make a call.

Next, the example shown in FIG. 4(b) will be explained. Control station 11
Control bag if there is an incoming call to! 23 receives the mobile station number. The control device 23 stores the mobile station 19b from the memory 24.
searches for the small zone station 14b whose location has been registered, and sends an incoming call signal 160 to this small zone station 14b. When the control device 23 sends out the incoming call signal 160, it activates the timer 25 to measure the time elapsed since the signal was sent.

The small zone station 14b adds its own base station number and communication channel number to the incoming signal 160 received from the control station 11, and wirelessly sends out an incoming signal 1161.
After sending, the small zone station 14b enables reception of the wireless channel of the communication channel number. Alternatively, it may be possible to always receive the information.

The mobile station 19b moves to the radio zone 18 of the small zone station.
The incoming signal [61] from the small zone station 14b cannot be received because the incoming signal [61] has come out from the small zone station 14b.

In the control station 11, a control device 23 monitors a timer 25. If the incoming call response signal [64 is not received for a certain period of time or longer, the control device 23 determines that the mobile station 19b has moved and left the radio zone 18b of the small zone station, and uses the talkie 26 to move to the caller, for example. Notify the station of its absence. If a message is to be sent to the mobile station 19b, it is conceivable to use the talkie 26 to prompt the mobile station to input the message. In this case, when a message is input, a message signal 165 is transmitted to the large zone station 13 to notify the large zone station 13 that the message or message has arrived. In the latter case, the control device 2
3 stores the input message in the memory 24.

The large zone station 13 receives the message signal 1 from the control station 11.
65, a message signal 11 is sent to the mobile station 19b.
66 by radio.

The mobile station 19b displays a message or the presence of a message. In the latter case, in order for the mobile station 19b to receive and receive messages, for example, after moving within the wireless zone 16 of the small zone station, the mobile station 19b calls a specific number and sends the message
There is a method of referring to a message using the reference number, code, etc. shown in 3.

Comparing the system shown in FIG. 6 with the system shown in FIG. 7, in the system shown in FIG. , there is an advantage that the user can receive an incoming call by returning to the zone where the incoming call is known. However, since the large zone station 13 is used every time there is an incoming call, the traffic of the large zone station 13 increases.

FIG. 8 is a diagram showing an example of the frame structure of the incoming signal 160 and the calling signal 62.

In the figure, 80 is a preamble, 81 is a frame synchronization, 82 is a mobile station number, and 83 is a control station 11 from the fixed network side.
represents the caller's number when the caller's number is received or received. Mobile station number 82 is a small zone station wireless zone 1
If there are multiple mobile stations 19 within 8 that can receive the incoming signal 1161, the mobile station can It becomes possible to display the caller number.

FIG. 9 is a diagram showing an example of the frame structure of the incoming signal 1161.

In the figure, 90 is a preamble, 91 is a frame synchronization, 92 is a mobile station number, and 93 is a mobile station number from the fixed network side.
The caller ID is 94 when the caller ID is received and received.
95 represents the base station number corresponding to each small zone station, and 95 represents the communication channel number of the wireless section for the small zone station 14 to communicate with the mobile station 19.

Figure 1θ shows the incoming call response signal 163 and the incoming call response signal 116.
4 is a diagram showing an example of a frame configuration of No. 4. FIG.

In the figure, 100 represents a preamble, 101 represents frame synchronization, and 102 represents a base station number. The base station number 102 is the incoming call response signal 163 transmitted from the mobile station 19.
When multiple small zone stations 14 can receive the incoming signal n6
This is a signal for specifying the small zone station 14 that transmitted the signal.

FIG. 11 shows message signal 165 and message signal 1.
166 is a diagram showing an example of a frame structure of 166.

In the figure, 110 represents a preamble, 111 represents frame synchronization, 112 represents a mobile station number, and 113 represents a message. The message 113 may be, for example, the message itself, or a reference number or code for referring to the message.

FIG. 12 is a diagram showing an example of a block diagram of the mobile station 19 in a case where a large zone station mobile station device (a>) and a small zone station mobile station device (b) are separated.

In the figure, 120 is an antenna, 121 is a radio device, and a large zone station radio receiver 121a has only a receiving function.

The small zone open radio transceiver 121b has a transmitting and receiving function, 123 is an audio circuit, and the small zone station 14 transmits and receives audio.
This is only available in mobile station equipment for small zone stations.

A display device 124 displays the caller number and message sent from the large zone station 13. Reference numeral 125 stores the caller number and message in a memory, and is used when displaying the caller number and message later. 126 is a microphone, 1
27 represents a speaker. The microphone 126 and speaker 127 are provided only in the small zone station mobile station device.

As an example of a configuration in which the large zone station mobile station device (a) and the small zone station mobile station device f (b) are separated, a display generally used in the large zone station mobile station device (a) is used. It is possible to use a pager.

The advantages of adopting such a configuration are: - For boat fishing, the power supplies for the large zone station mobile station device (a) with low power consumption and the small zone station mobile station device (b) with high power consumption are separate. By doing this, even if the mobile station is in the wireless zone 1B of the small zone station and cannot receive a call because it has no battery,
The point is that only the display can be left.

〔Effect of the invention〕

As described above, according to the inventions of claims 1 and 2, by combining a small zone station and a large zone station, it is possible to carry a high call volume locally and cover a wide area. This makes it possible to realize mobile phone services for individuals that require these conditions.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of a communication system according to an embodiment of the invention to which the mobile communication system is applied, FIG. 2 is a detailed configuration diagram of a control station according to the embodiment, and FIG. 3 is a detailed configuration diagram of a large zone station according to the embodiment. 4 is a detailed configuration diagram of the small zone station of the embodiment, FIG. 5 is a detailed configuration diagram of the mobile station of the embodiment, FIG. 6 is an explanatory diagram of the operation of the embodiment, and FIG. 7 is the operation of the embodiment. Explanatory drawings: FIG. 8 is a frame configuration diagram of the incoming signal ■ of the embodiment; FIG. 9 is a frame configuration diagram of the incoming signal H of the embodiment; FIG. 1θ is a frame configuration diagram of the incoming response signal of the embodiment; The figure is a frame configuration diagram of a message signal, and FIG. 12 is another configuration diagram of the mobile station of the embodiment. In the figure, IO is the line, 11 is the control station, 12 is the wired transmission network, 13 is the small zone station, 14 is the large zone station, 15 is the large zone station antenna, 16 is the small zone station antenna, and 17 is the large zone station. 18 is a wireless zone of a small zone station; 19 is a mobile station. Figure Figure Figure Figure Figure Ca) Figure Figure Figure (a (b)

Claims (2)

[Claims] (1) A mobile station that has a function of transmitting and receiving signals, a function of displaying received messages, and a function of inputting and outputting audio, and a first base station with a large wireless zone that has a function of transmitting signals to the mobile station. , a second base station with a small wireless zone that has a function of transmitting and receiving signals with the mobile station, and a control station that controls the first base station and the second base station, and the control station The mobile station is characterized in that when there is an incoming call to the mobile station, signals are sent from the first and second base stations to the mobile station, and the mobile station displays a message or makes a call. Mobile communication system. (2) In the mobile communication system according to claim 1, when the control station receives an incoming call to the mobile station, transmitting a signal from the second base station and waiting for a response from the mobile station;
A mobile communication system characterized in that when there is no response, the first base station transmits a message to the mobile station.