JPH04104698A - Cordless telephone system - Google Patents

Abstract

PURPOSE:To shorten the interruption time of a telephone call due to movement among telephone call areas by installing plural fixed parts, and specifying a movement-destination telephone call area previously by necessary operation at a portable part and securing a telephone call channel in use. CONSTITUTION:Telephone call channels being used by the fixed parts 3-5 which are decentralized and installed are monitored by channel monitor parts provided to the respective fixed parts 3-5 or registered in a telephone exchange 1. According to the movement-destination specifying operation at the portable part, a telephone call channel detected by a channel monitor part or telephone channel other than the telephone call channel in use which is read out of the telephone exchange 1 is specified and a fixed part which receives the specification of the movement destination among the fixed parts 3-5 is inhibited from using this telephone call channel; when the reception sensitivity of the specified fixed part exceeds a set value, the telephone line to the portable part is switched to the fixed part among 3-5. Consequently, when the portable part moves among the telephone call areas A-C of the fixed parts 3-5, its telephone call is never interrupted.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a cordless telephone system, in which when a mobile unit makes a call while moving between the call areas of a plurality of fixed units, the call is not interrupted and the call is not interrupted. Regarding things that can be moved to the calling area.

[Prior 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. There are some that allow you to make phone calls. However, since the radio waves used are of low power, there is a limit to the communication area of the fixed unit (parent m>).

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 a plurality of fixing parts are distributed and installed at appropriate locations. Then, by specifying the destination of the call using the destination designation operation on the mobile unit, the call channels used by the fixed unit and the destination fixed unit are detected, or the call channels used by each fixed unit are registered in the telephone exchange, etc. Then, the registered call channel is read by the movement destination designation operation, and the channel setting section sets a channel other than the call channel in use as the call channel. Then, the fixed unit designated as the destination is prohibited from using the communication channel, and the reception-only unit is instructed to monitor the signal of this communication channel, and if the reception sensitivity of this signal exceeds a preset value. When this happens, the fixed unit is designated to make a call using this channel, and the call line with the mobile unit is switched to the fixed unit via the telephone exchange, thereby allowing the mobile unit to move between the call areas of multiple fixed units. To provide a cordless telephone system in which calls are not interrupted when calls are made.

[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 consisting of a mobile unit that performs transmission and reception between the two, a channel monitoring unit that is provided in each of the fixed units or telephone exchanges and monitors the communication channel in use;
a setting section provided in each of the fixed sections for setting the registration and destination designation of the mobile section based on the movement destination designation operation of the mobile section; a channel setting section for specifying a call channel; a reception-only section for receiving a call signal;
a control section that controls the channel monitoring ridge setting section, the channel setting section, and the reception-only section; When the reception signal level of the communication channel in the reception-only section reaches a set value, the fixed section is designated as a communication channel, and the telephone exchange is used to connect the communication line with the mobile section. The present invention provides a cordless telephone system configured to switch the fixed part to the fixed part.

[Function] With the above configuration, in the cordless telephone system according to the present invention, a plurality of fixed parts are distributed and installed at appropriate locations. Then, the communication channels in use in each of these fixed units are monitored by a channel monitoring unit provided in each fixed unit, or the communication channels in use are registered in the telephone exchange. Then, based on the movement destination designation operation of the mobile unit, the channel setting unit specifies a call channel other than the call channel detected by the channel monitoring unit or the call channel in use read out from the telephone exchange, and also specifies the move destination. The use of this communication channel is prohibited for fixed units designated by .

Then, the specified fixed unit receives the signal of the communication channel, determines the reception sensitivity, and when the sensitivity exceeds a set value, switches the communication line with the mobile unit to the fixed unit.

[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 fixed part (base units) of the cordless telephone system. First, in FIG. 1, ``■'' is a telephone exchange, and an exchange connection is established based on the telephone number from the outside line 2, etc. 3. 4 and 5 are fixed parts, respectively, in call area A, B or C.
It transmits and receives wireless communication signals to and from mobile units in each area. (a) and (b) show 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 monitoring section that monitors the communication channels in use in each fixed section. Reference numeral 12 denotes a transmitting/receiving unit which transmits and receives call signals to and from mobile units within the call area via the antenna 13. Reference numeral 14 denotes a setting section, which sets registration of the portable section, designation of the moving destination, etc. in response to a "destination designation" operation of the portable section.

A channel setting section 15 sets a call channel other than the channel detected by the channel monitoring section 11 based on the settings of the setting section 14.

Reference numeral 16 denotes a control unit that specifies the communication channel of the transmitting/receiving unit 12 to the channel set by the channel setting unit 15. Reference numeral 17 denotes a receiving section, which corresponds to the reception-only sections 5.6 and 7, and receives the call signal via the antenna 18 while sweeping the range of all call channels, for example. Reference numeral 19 denotes a receiving sensitivity determining section, which measures the level of the signal received by the receiving section 17 and determines the receiving sensitivity. Reference numeral 20 denotes a storage unit that stores control programs for the device and the like.

Next, the operation of the cordless telephone system according to the present invention will be explained. The mobile unit is currently, for example, in the call area A (a
), and a wireless call is in progress via the fixed unit 3.

If you want to move the mobile unit that is currently talking from within the current call area A to, for example, call area B (the call area of the fixed unit 4) while continuing the call, this prevents the call from being interrupted when moving. For this purpose, the operator operates operation buttons provided on the mobile unit, such as the ``specify destination'' button and the ``02'' button for specifying call area B, for example.

As a result, the mobile unit transmits an identification signal designating the call area B as the destination, and is received by the transmitting/receiving unit 12 via the antenna 13 of the fixed unit 3. In response to this reception,
Via the control section 16, the setting section 14 registers the identification code of the mobile section in the data record tt6I area of the storage section 20 and writes necessary data for setting the destination as the call area B. On the other hand, the channel monitoring unit 11 monitors the call channel in use, and the channel monitoring unit 11 monitors the call channel in use.
In response to the "Specify destination" operation, a communication channel detection signal is output.

Then, the channel setting section X5 sets a channel other than the communication channel detected by the channel monitoring section 11, and the communication channel of the transmitting/receiving section 12 is designated as this channel via the control section 16. Next, via the telephone exchange 1, the mobile unit prohibits the fixed unit 4 in the call area B designated as the destination from using the call channel specified in the transmitting/receiving unit 12, and also prohibits the fixed unit 4 from using the designated call channel. The receiving section 17 is instructed to monitor (receive) the signal of the communication channel, and the receiving sensitivity determining section 19 is instructed to measure the sensitivity of the received signal. And the mobile part (
When point (b) is approached from point a) and the measured value of reception sensitivity by reception sensitivity determination section 19 of fixed section 4 exceeds a set value stored in advance in storage section 20 or the like, control section 16 The setting contents of the fixed part 3, that is, the registration of the identification code of the mobile part, the setting of the call channel to be used, etc., are transferred to the fixed part 4.
to a predetermined data storage area. Thereafter, the telephone line with the mobile unit is switched from the fixed unit 3 to the fixed unit 4 via the telephone exchange l.

In addition, in the above, the destination was specified as one place in call area A, but if there are two places to move to including call area B,
When operating the mobile unit to specify a destination, the call area B
Call area C is designated redundantly by the required operation at the time of designation operation. 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 can be sent to the fixed part at the destination one after another. It is also possible to carry out uninterrupted calls over a wide range beyond the call area of a single fixed unit.

In addition, in the above, when the reception sensitivity of the fixed part during call signal monitoring exceeds the set value, the call line with the mobile part is automatically switched to that fixed part, but when the fixed part is monitored before moving, It is also possible to compare the reception sensitivity of the stationary unit to which the mobile station is to be moved and to switch the call line if it is determined that the reception sensitivity of the stationary station at the destination is higher.

[Effects of the Invention] As explained above, in the cordless telephone system according to the present invention, it is possible to use a wide place where the call area of one fixed part cannot cover calls with a mobile part used while moving. By installing multiple fixed units in the mobile unit and specifying the destination call area in advance through the necessary operations on the mobile unit and securing the call channel in use, it is possible to use the same call channel in the call area to which the user has moved. guaranteed. Therefore, when the mobile part moves between call areas, the interruption of the call is only for a short period of time for the fixed part to switch, and the same call channel is set each time the fixed part is switched, as in the past. This method has the advantage that there is no need for time for communication, and therefore, call interruption time due to movement between call areas 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 the fixed part of the cordless telephone system. In the figure, ■ is a telephone exchange, 3 to 5 are fixed parts, 6 to 8 are reception only parts, 11 is a channel monitoring part, 12 is a transmission/reception part, 13 and 18 are antennas, 14 is a setting part, 15 is a channel setting section, 16 is a control section, 17 is a receiving section, 19
20 is the reception sensitivity determination section, 20 is the storage section, A is the call area of the fixed part 3, B is the call area of the fixed part 4, C is the call area of the fixed part 5, (a) and (g)) are the call area of the mobile part. It is the location. Patent applicant Fujitsu General Co., Ltd. Figure 1 Figure 2

Claims (1)

[Claims] In a cordless telephone system consisting of a plurality of fixed parts that are connected to a telephone exchange and enable wireless transmission and reception in each call area, and a mobile part that transmits and receives data between these fixed parts, each of the fixed parts a channel monitoring unit provided in the telephone exchange or telephone exchange to monitor the call channel in use; and a setting provided in each of the fixed units to set the registration and destination designation of the mobile unit based on the movement destination designation operation of the mobile unit. a channel setting section that specifies a call channel other than the channel detected by the channel monitoring section based on the settings of the setting section; a reception-only section that receives a call signal; the channel monitoring section, the setting section, and the channel setting section. Based on the settings of the setting section, the control section instructs the fixed section specified as the destination to prohibit the use of the communication channel via the control section, and In contrast, when the reception signal level of the communication channel in the reception-only section reaches a set value, the channel is designated as the communication channel, and the telephone exchange is configured to switch the communication line with the mobile section to the fixed section. A cordless telephone system featuring: