JPH04104697A - Cordless telephone system - Google Patents

Abstract

PURPOSE:To shorten a repeating time for movement between telephone call areas by installing plural fixed parts and fixing the telephone call channel of a portable part to the same channel during the continuation of a telephone call. CONSTITUTION:The fixed parts 3-5 are decentralized and installed at proper places. The telephone call channel in use at the respective fixed parts 3-5 is registered in a telephone exchange 1, etc., by necessary operation at the portable part and a channel setting part specifies a telephone call channel other than the registered channel and inhibits the fixed parts 3-5 from using this telephone call channel. Then reception sensitivity is inverted at the fixed parts 3-5 and when the sensitivity exceeds a set value, the telephone line to the portable part is switched to the fixed part among 3-5. Consequently, even when the portable part moves among the telephone call areas A-C of the fixed parts 3-5, the telephone call is made discontinuous.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a cordless telephone system, in which when a mobile unit makes a call while moving between respective call areas of a plurality of fixed units, it is possible to continue the call. This relates to something that allows you to move to another calling area while still being able to move to another area.

[Background Art] In recent years, telephones with cordless telephone lines using low-power radio waves have come into widespread use. Since such telephones can make calls over a fairly wide range and are easy to carry, cordless telephone systems are introduced in places where calls need to be made over a wide range while moving, and the portable part (slave unit) can be used from anywhere. However, because the radio waves used use low power, there is a limit to the communication area of the fixed unit (base unit).

For this reason, for example, if the mobile unit is installed at a golf course or the like where the mobile unit has a wide range of movement, multiple fixed units are installed at appropriate locations, and the mobile unit is able to make calls via the fixed units whose calling area is the mobile unit. However, in this case, in order to move from the calling area of one fixed unit to the calling area of another fixed unit, the call with the previous fixed unit must be stopped, and then, after Switch to a call via the At this time,
In order to set the call channel of the fixed part of the destination, etc.
During this time, the call is interrupted, which is a nuisance. Therefore, there has been a need for a system that does not interrupt a call when moving from one call area to another during a call.

[Problems to be Solved by the Invention] The present invention has been made in view of the above points, and is a cordless telephone system that can be used in a wide place where it is impossible to communicate with a moving mobile unit only in the calling area of one fixed unit. When introducing a system, install multiple fixed units in appropriate locations, register the call channels in use on each fixed unit with a telephone exchange, etc.
Based on the required operation on the mobile unit, the channel setting unit specifies a communication channel other than the registered channel and prohibits each fixed unit from using this communication channel. Then, each fixed unit determines the reception sensitivity of the signal of the communication channel, and when the reception sensitivity exceeds a set value, the communication line with the mobile unit is switched to the fixed unit while maintaining the same communication channel. To provide a cordless telephone system in which a call is not interrupted even when a mobile part moves between call areas of a plurality of fixed parts.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides a plurality of fixed parts that are connected to a telephone exchange and enable wireless transmission and reception in each call area, and a connection between these fixed parts. In a cordless telephone system comprising a mobile unit that transmits and receives data between the telephone exchange and each fixed unit, a channel registration unit that registers the call channel in use is provided in the telephone exchange or each fixed unit;
a setting section provided in each of the fixed sections for setting the registration and movement of the mobile section based on required operations of the mobile section; and a call channel other than the channel read out from the channel registration section based on the settings of the setting section. a channel conflict setting section for specifying the channel, a reception-only section for receiving the call signal of the specified channel, and a control section for controlling the setting section, the reception-only section, and the channel setting section; Based on the settings, the control unit instructs each fixed unit to prohibit the use of the communication channel, specifies the communication channel to the fixed unit whose reception signal level in the receive-only unit has reached the set value, and transmits the communication to the mobile phone using the telephone exchange. The present invention provides a cordless telephone system configured to switch the telephone line between the station and the fixed unit to the fixed unit.

[Operations] With the above structure, in the cordless telephone system according to the present invention, a plurality of fixed parts are distributed and installed at appropriate locations. By performing the necessary operations on the mobile unit, the call channel in use at each fixed unit is registered in the telephone exchange, etc., and the channel setting unit specifies a call channel other than the registered channel, and the Prohibit use of this calling channel. Then, each fixed unit receives the signal of the communication channel and determines the reception sensitivity, and when the sensitivity exceeds a set value, the communication line with the mobile unit is switched to the fixed unit.

A plurality of fixed units are provided with reception-only units that receive communication signals from the mobile unit, and a channel determination unit determines the communication channel of the received signal and registers it in a channel registration unit provided in a telephone exchange. Then, each fixed unit specifies a call channel other than the one registered in the channel registration unit as a channel for a newly generated call.

Embodiments] Hereinafter, embodiments of the cordless telephone system according to the present invention will be described in detail based on the drawings.

FIG. 1 is a conceptual diagram of a calling area of a cordless telephone system according to the present invention, and FIG. 2 is a block diagram of essential parts of an embodiment of the cordless telephone system, such as a fixed part (main IT) and a telephone exchange. First, in Fig. 1, 1 is a telephone exchange, which performs exchange connection based on the telephone number from outside line 2, etc., 3.4 and 5 are fixed parts, respectively, in the call area A.
, B, or C, and transmits and receives wireless communication signals to and from mobile units in each area. (a), ■) and (
C) shows the position to which the mobile unit moves. Denoted at 6.7 and 8 are reception-only sections, which are installed alongside the fixed section 3, fixed section 4, and fixed section 5, respectively, and constantly receive call signals.

In FIG. 2, reference numeral 11 denotes a channel registration section which registers communication channels in use at each fixed section via the telephone exchange 1. Reference numeral 12 denotes a plurality of transmitting/receiving units, which transmit and receive call signals to and from mobile units within the call area via the antenna I3. 1
Reference numeral 4 denotes a setting unit, which performs registration of the mobile unit and settings for mobile calls, etc. in response to a required “mobile call” operation of the mobile unit. 1
Reference numeral 5 denotes a channel setting section, which sets channels other than the call channel names registered in the channel registration section 11, based on the settings of the setting section I4. 16 is a control unit;
The channel setting section 1 sets the communication channel of the transmitting/receiving section 12.
Specify the channel set in step 5. 17 is a receiving section (
(plurality) correspond to the reception-only sections 5.6 and 7, and receive call signals via the antenna 18, respectively. 19
1 is a receiving sensitivity determining section that measures the level of the signal received by the receiving section 17 and determines the receiving sensitivity.

20 is a storage unit that stores a control program for the device and the like.

Next, the operation of the cordless telephone system according to the present invention will be explained. In the channel registration section 11, the call channel number in use of the fixed section 3.4, 5, etc. is registered via the telephone exchange l. Now, for example, the portable unit is currently located at point (a) within the call area A, and is in the middle of a wireless call via the fixed unit 3. From now on, the mobile unit will be set to call area A.
If you plan to use the mobile unit while moving to call area B or call area C, etc., operate the required operation button on the mobile unit, for example, the "mobile call" button, in order to prevent the call from being interrupted when you move. As a result, a signal for setting mobile phone call J is transmitted from the mobile unit, and is received by the transmitting/receiving unit 12 via the antenna 13 of the fixed unit 3. Then, the setting unit 14 registers the identification code of the mobile unit in the data storage area of the storage unit 20 and sets “mobile call”. Then, the channel setting section 15 selects the channel registration section 1.
A channel other than the communication channel read out from 1 via the control unit 16 is set, and the communication channel of the transmitting/receiving unit 12 is designated as this channel via the control unit 16.

Then, via the telephone exchange 1, other fixed units, such as the fixed unit 4 and the fixed unit 5, are prohibited from using the communication channel specified in the transmitting/receiving unit 12, and each receiving unit 17 of these fixed units is prohibited. , to monitor (receive) the signal of the communication channel, and instruct each reception sensitivity determining section 19 to measure the sensitivity of the received signal. For example, if the mobile unit approaches point (b1) from point (a),
When the measured value of the reception sensitivity in the fixed part 4 exceeds a set value stored in advance in the storage part 20 etc., the control part 16
The setting contents of the fixed unit 3, ie, the registration of the identification code of the mobile unit, the setting of "mobile call", the setting of the call channel to be used, etc., are transferred to a predetermined data storage area of the fixed unit 4. The fixed unit 3 then prohibits the use of this call channel while the call continues. And telephone exchange I! The communication line with the mobile unit is switched from the fixed unit 3 to the fixed unit 4 via the mobile terminal 1.

When the mobile unit further moves to another call area C, etc., the same operation as described above is repeated.

In the above description, the channel registration section for registering the call channels used in each fixed section is connected to the telephone exchange, but this channel registration section may be provided in each fixed section. In addition, when the reception sensitivity of a fixed part that is monitoring a call signal exceeds a set value, the call line with the mobile part is automatically switched to that fixed part, but the reception sensitivity of two adjacent fixed parts The communication line may be switched to the fixed part determined to have higher reception sensitivity.

In addition, although the example above has been explained in which fixed parts are provided in three locations, if a large number of fixed parts are arranged, as the mobile part moves, the same call channel will be sent to the fixed part at the destination one after another. By switching, it becomes possible to carry out uninterrupted calls over a wide range beyond the call area of a single fixed unit.

[Effects of the Invention] As explained above, the cordless telephone system according to the present invention can be used in large areas where the calling area of one fixed part cannot cover calls with mobile parts that are used while moving. Install multiple fixed parts to cover the necessary range depending on the calling area of each fixed part.
Depending on the mobile phone setting, etc., the mobile phone channel is fixed to the open channel for the duration of the call, so if the mobile phone moves between call areas, The only interruption of the call is the short time required for fixed part switching, and there is no need for the traditional time to set up the call channel each time the fixed part is switched. This has the advantage that call interruption time due to movement can be shortened.

[Brief explanation of the drawing]

FIG. 1 is a conceptual diagram of a calling area of a cordless telephone system according to the present invention, and FIG. 2 is a block diagram of essential parts of an embodiment of a telephone exchange and a fixed part of the cordless telephone system. In the figure, 1 is a telephone exchange, 3 to 5 are fixed parts, 6 to 8 are reception-only parts, 11 is a channel registration part, 12 is a transmission/reception part, 13 and 18 are antennas, 14 is a setting part, and 15 is a channel Setting section, 16 is a control section, 17 is a receiving section, 19
20 is a reception sensitivity determination section, 20 is a storage section, A is a fixed section 30 talking area, B is a fixed section 40 talking area, C is a fixed section 5 talking area, (a), (b) and (C) are mobile sections. is the location of. Patent applicant: Fujitsu General Ltd. Figure 1 Figure 2

Claims (1)

[Claims] In a cordless telephone system comprising a plurality of fixed parts that are connected to a telephone exchange and enable wireless transmission and reception in respective call areas, and a mobile part that transmits and receives data between these fixed parts, the telephone exchange or a channel registration unit provided in each fixed unit to register the call channel in use; and a setting unit provided in each fixed unit to set registration and movement of the mobile unit based on required operations of the mobile unit; a channel setting section that specifies a call channel other than the channel read out from the channel registration section based on the settings of the setting section; a reception-only section that receives the call signal of the specified channel; and the setting section, the reception-only section. and a control section that controls the channel setting section, and based on the settings of the setting section, instructs each fixed section to prohibit the use of the communication channel via the control section, and sets the reception signal level of the reception only section to the set value. 1. A cordless telephone system, characterized in that said communication channel is designated for a fixed part that reaches said telephone number, and a telephone exchange switches a telephone line with a mobile part to said fixed part.