JPH06178345A - Speech path detour system - Google Patents

Abstract

PURPOSE:To make calling via other cordless system base station even possible if call amount of a cordless base station increases or a fault occurs in a speech path. CONSTITUTION:When the call line 14 between an electronic exchange 11 and a prescribed cordless system base station 12 is shut by other call or when a fault such as discontinuity, etc., occurs in the call line 14, a cordless system base station 12 responds to the calling from a cordless system mobile station 22a. Thus, the information received from the cordless system mobile station 22a is transmitted to other neighboring cordless system base station 13 and a detour connection with the electronic exchange 11 is performed via a free call line 15 that other pertinent cordless base station 13 has.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a call path detouring method in a cordless system, and more particularly to a call path detouring method when a call path between an electronic exchange and a predetermined cordless system base station cannot be secured.

[0002]

2. Description of the Related Art In recent years, offices of various companies have become more OA-oriented, and one OA device, one telephone, and the like are being used by each person in various ways. Along with this, the amount of cables to be wired on each floor increases, and in order to solve these problems, it is required to integrate the cables and make them cordless. For this reason, in the field of telephone exchange, cordless is particularly advanced. Cordless is to disassemble the telephone into a base station connected to the exchange and a mobile station for making an actual call,
In the meantime, it is realized by performing wireless communication by electromagnetic waves.

Normally, these base stations and mobile stations usually exist on a one-to-one basis, but considering the call volume and cost, it is advisable to handle a small number of base stations with a plurality of mobile stations. it is conceivable that. In addition, if a state where a call can be made anywhere in the company is created, communication becomes possible anytime and quick response can be performed. Against this background, cordless systems have been developed in which an electronic exchange, a cordless system base station, and a cordless mobile station (portable cordless telephone) cooperate with each other. FIG. 6 is an explanatory view of a conventional cordless system. 1 is an electronic exchange, 2 is a cordless system base station connected to the electronic exchange, and 3a to 3n are cordless system mobile stations connectable to the cordless system base station. Cordless telephone), 4 is a telephone connected to an electronic exchange, and 5 is a telephone line (for example, 3 lines) provided between the electronic exchange and the cordless system base station. According to such a cordless system, a maximum of three cordless mobile stations can call simultaneously.

[0004]

However, in this way,
When multiple cordless system mobile stations are associated with one cordless system base station, the line of the base station becomes insufficient due to an unexpected increase in call volume, making it impossible to secure a communication path, or a call between the base station and the electronic exchange. Similarly, if the road fails for some reason (for example, disconnection), it becomes impossible to secure the communication path and the user cannot use the cordless mobile station. Then, if the line is insufficient, it is necessary to call again after a while, and if a failure occurs, there is a problem that the call cannot be made until the failure is recovered. From the above, an object of the present invention is to provide a call route detouring method that can prevent a situation in which a user cannot talk with a sudden increase in call volume and that enables a call even if a trouble occurs in the call route. Is to provide.

[0005]

FIG. 1 is a diagram for explaining the principle of the present invention. 11 is an electronic exchange, 12 and 13 are cordless system base stations connected to the electronic exchange, and 14 and 15 are electronic exchange 11 and cordless system base stations 12 and 13.
Communication lines (for example, 3 lines) provided between, 22a-2
2n is a cordless system mobile station (portable cordless telephone) connectable to the cordless system base station 12;
3a to 23m are cordless system mobile stations connectable to the cordless system base station 13.

[0006]

When the telephone line 14 between the electronic exchange 11 and the predetermined cordless system base station 12 is blocked by another call, or when the telephone line 14 has a failure such as a disconnection, the cordless system Mobile station 22
When a call is made from a, the cordless system base station 12 transmits the information received from the cordless system mobile station 22a to another cordless system base station 13 and the free call line 15 of the other cordless system base station 13 is transmitted.
A bypass connection is made to the electronic exchange 11 via. In this way, even if the call volume of a predetermined cordless base station increases, the user can talk through another cordless system base station, and even if a call path failure occurs, the user can talk in the same way. be able to.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Overall Configuration FIG. 2 is a block diagram of an embodiment of a speech path detour system of the present invention.
In the figure, 11 is an electronic exchange, 12 and 13 are cordless system base stations connected to the electronic exchange, and 14 and 15 are communication lines provided between the electronic exchange 11 and the cordless system base stations 12 and 13, for example, three lines. Having 1
6 is a telephone connected to an electronic exchange, 22a to 22n are cordless system mobile stations (portable cordless telephones) connectable to the cordless system base station 12, 23a to
A cordless system mobile station 23m is connectable to the cordless system base station 13. In addition, A is the range where the electromagnetic waves emitted from the cordless system base station 12 reach, B
Is the range within which the electromagnetic waves emitted from the cordless system base station 13 reach.

The cordless system base stations 12 and 13 have a function of transmitting electromagnetic waves to the mobile stations 22a to 22n and 23a to 23m, a function of transmitting electromagnetic waves to other base stations, and the mobile stations 22a to 22n and 23a to. It has a function of receiving an electromagnetic wave transmitted from 23 m and a function of receiving an electromagnetic wave transmitted from another base station. The cordless mobile stations 22a to 22n and 23a to 23m can communicate with the cordless system base stations 12 and 13 via electromagnetic waves, respectively. Hereinafter, the entire operation will be described for the case of making a call from the mobile station and the case of receiving a call.

Calling from Mobile Station FIG. 3 is a flow chart of control of the cordless system base station when the mobile station originates a call. When a predetermined cordless mobile station 22a existing in the area A where the electromagnetic waves emitted from the cordless system base station 12 reach makes a call operation to the telephone set 16 (step 101), control (not shown) in the cordless system base station 12 is performed. The department checks whether a fault (disconnection, etc.) has occurred in the telephone line 14 (step 102). If there is no fault in the communication line 14 and it is normal, it is checked whether or not there is a space in the communication line 14 (step 103). That is, the other mobile stations 22b to 22n
Check if the call line (3 lines) is blocked by.

If there is a vacancy, the vacant line is moved to the mobile station 2
It is assigned to the call from 2a and the information from the mobile station is transmitted to the electronic exchange 11. After that, the processing of the electronic exchange establishes a communication path with the partner telephone 16 to enable communication (step 104). On the other hand, if an abnormality has occurred in the call line 14 or if there is no vacancy in the call line 14 due to another call, an inquiry is made to the neighboring cordless system base station 13 by electromagnetic waves whether there is a vacant line ( Step 106). Cordless system base station 1
In response to the inquiry, 3 replies to the cordless system base station 12 whether there is a vacant line.

The cordless system base station 12 analyzes the reply to the inquiry and determines whether there is a vacant line (whether there is a detour) (step 107). If there is no available line, the cordless system base station 12
Notifies the mobile station 22a that made the call operation that the call is impossible, and ends the call control (step 108). In this case, it may be possible to make an inquiry to another neighboring cordless system base station as to whether there is an available line. If there is a vacant line, the cordless system base station 12 retransmits the information transmitted from the mobile station 22a to the neighboring cordless system base station 13 by electromagnetic waves (step 109). The adjacent cordless system base station 13 transmits the received information to the electronic exchange 11 via its own telephone line 15. As a result, the call path with the partner telephone 16 is established by the processing of the electronic exchange 11, and thereafter the neighboring cordless system base station 13 and its call line 15 are established.
You will be able to make a call via.

Incoming Call to Mobile Station FIG. 4 is a flow chart of processing when an incoming call arrives at the mobile station. When a call is made from the telephone set 16 to the predetermined mobile station 22a, the electronic exchange 11 determines the cordless system base station 12 to which the mobile station 22a belongs based on the telephone number included in the call information (step 201). Next, it is checked whether or not there is a failure (disconnection, etc.) in the communication line 14 between the cordless system base station 12 and the electronic exchange 11 (step 202). If the communication line 14 has no fault and is normal, it is checked whether or not the communication line 14 has a space (step 203). That is, it is checked whether the communication lines (3 lines) are blocked.

If there is a vacant line, the vacant line is assigned to the incoming call to establish a communication path with the mobile station 22a to enable the communication (step 204). On the other hand, there is something wrong with the call line 14 or another call causes a call line 14
If there is no vacant line, it is checked whether or not there is a vacant line in the neighboring cordless system base station 13 (step 205). If there is no vacant line, there is an vacant line in another neighboring cordless system base station. If there is no vacancy in the all-neighboring cordless system base station, the telephone 16 is notified that the call is impossible and the call control ends (step 206). If there is a free line in a predetermined neighboring cordless system base station 13, the electronic exchange 11 sends the information to the cordless system base station 13 via the call line 15 by applying a detour procedure to the cordless system base station 12. Send. As a result, the cordless system base station 13 does not receive its own call, but retransmits the information to the cordless system base station 12 by an electromagnetic wave and makes the mobile station 22 in the base station 12 receive the information (step 20).
7).

Configuration of Cordless System Base Station FIG. 5 is a configuration diagram showing an example of the cordless system base station, and 12 and 13 are cordless system base stations and 22.
22n are portable cordless telephones (mobile stations). In the cordless system base station 12, 12a performs a burst transmission / reception of digital voice data to / from the mobile stations 22a to 22n and a digital radio unit 12b-1 to 12b- for transmitting / receiving data to / from the neighboring cordless base station 13. Reference numeral 3 is an analog line interface unit for pulling in an analog 2W subscriber line (may be a digital line interface for pulling in an ISDN line). Analog line interface section 12b-1
Although not shown in ~ 12b-3, the analog line terminal, AD
A DA converter and a highway interface are provided. 12c is a concentrator with down and up highways, 12d is a base station controller that controls the entire cordless system base station, and each line interface unit 12b-1 to 12b-3 or a digital interface is provided via the concentrator 12c. Wireless unit 12
Control information is transmitted / received to / from a and various controls are performed. 1
2e is a format conversion unit.

The line concentrator 12c has a down highway DHW,
It has an upstream highway UHW and a highway terminal TER. The downlink highway DHW is a highway that sends data from the line interface unit side to the digital radio unit 12a, and the uplink highway UHW is a highway that sends data from the digital radio unit 12a to the line interface unit side. A control unit 12d and a format conversion unit 12e are connected to the highway terminal unit TER.

Data is time-division multiplexed and sent to each of the highways DHW and UHW. One frame is divided into several time slots, and each time slot is for 1-byte data and control information. Control bits. When the mobile station makes a call, the digital radio unit requests the base station control unit 12d for time slot allocation (line allocation) using the control information. In response to this request, the base station control unit 12d allocates the line interface and time slot used for the call if the line is available. After that, the digital radio unit side puts the data on the highway UHW in the designated time slot and sends it out, and the line interface side takes in the data in the designated time slot from the highway. Also, the line interface side puts the data on the highway DHW in the designated time slot and sends it out, and the digital radio section side takes in the data in the designated time slot from the highway. As described above, the line concentrating method by the highway is realized.

On the other hand, when a call is originated from the mobile station 22a,
If there is no vacancy in the line, the base station control unit 12d controls the digital radio unit 12a to inquire of the adjacent cordless system 13 about the vacancy of the line, analyzes the answer from the adjacent cordless system base station, and determines that there is a vacancy. For example, the data from the mobile station 22a is retransmitted to the adjacent cordless base station 13. The adjacent cordless base station 13 allocates an empty line as if a call originated from its own mobile station and establishes a communication path. Although the present invention has been described above with reference to the embodiments, the present invention can be variously modified according to the gist of the present invention described in the claims, and the present invention does not exclude these.

[0018]

As described above, according to the present invention, when the communication line between the electronic exchange and the predetermined cordless system base station is blocked by another call, or the communication line has a failure such as a disconnection. In this case, when a call is made from a predetermined cordless system mobile station, the cordless system base station transmits the information received from the cordless system mobile station to another cordless system base station in the vicinity, and the other cordless system base station. Since it is configured to make a detour connection to the electronic exchange through the unused call line of the user, even if the call volume of a predetermined cordless base station increases, the user can make a call through another cordless system base station, and Even if a failure occurs on the call path, it is possible to make a call by detouring in the same manner.

[Brief description of drawings]

FIG. 1 is a diagram illustrating the principle of the present invention.

FIG. 2 is a configuration diagram of an embodiment of the present invention.

FIG. 3 is a flow chart of call control from a mobile station.

FIG. 4 is a flow chart of processing when an incoming call arrives at a mobile station.

FIG. 5 is a configuration diagram of a cordless system base station.

FIG. 6 is an explanatory diagram of a conventional cordless system.

[Explanation of symbols]

11 ... Electronic exchange 12,13 ... Cordless system base station 14,15 ... Call line (for example, 3 lines) 22a-22n ... Cordless system mobile station (portable cordless telephone) 23a-23m ... Cordless system mobile station

Claims (1)

[Claims] 1. An electronic exchange (11), a cordless system base station (12, 13) connected to the electronic exchange, and a cordless system mobile station (22a-22n, 23a ...) connectable to the cordless system base station. 23 m) in a call route detouring method in a cordless system, an electronic exchange (11) and a predetermined cordless system base station (12)
If the communication path (14) between the cordless system base station (12) and the cordless system mobile station (22a ~
22n) information received from other cordless system base stations
A call path detouring method in a cordless system, characterized in that it is retransmitted to (13) and is detoured to an electronic exchange (11) via a call path (15) of the other cordless system base station.