JPS63299533A - Wide area cordless telephone system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a wide area cordless telephone system, and particularly to a wide area cordless telephone system in which one wireless zone includes a plurality of wireless connection devices.
Regarding the city talk method.

[Prior Art] Telephone line is connected via wireless connection equipment (CE) to iiJ! A cordless telephone system is used in which a %im connection is made to a radio telephone (located in R), allowing calls to be made within the vicinity of the CE without restrictions on location.

Further, a wide area cordless telephone system has been proposed in which a large number of wireless telephones can each be used as one of the local telephones in a wide area (service area) such as a business office.

In such a wide area cordless telephone system, a large number of wireless connection devices are distributed and rented within a service area, and each wireless connection device is shared by each wireless telephone. In order to achieve this sharing, each wireless connection device must be connected to a public line or private branch exchange (PBX).
It is necessary to interpose one radio line control unit (RCU) between the two. The radio line control device constantly registers and updates location information indicating which non-KQ telephones are currently within the surrounding range (wireless zone) of which wireless connection device.

When a certain wireless telephone makes a call or receives a call, the wireless connection device of the wireless zone where the wireless telephone is currently located is connected to the public line terminal or extension terminal corresponding to the wireless telephone of the public line or private branch exchange.

The control signal for registration and connection processing is the 0 call signal that is wirelessly transmitted between each wireless telephone and the wireless connection device on the control channel (c-ch). Communication channel (s-ch) for wireless transmission between
There are multiple wireless telephones and wireless connection devices that share the same information. Therefore, each wireless telephone has a multi-channel access function.

In order to be able to handle multiple wireless telephones at the same time within one wireless zone, multiple wireless connection devices are often placed in one wireless zone.

In this case, each wireless connection device is in an empty call channel search mode, a control channel standby mode, and sometimes takes a call channel search mode, a call mode, or a pause mode while waiting for a control channel.

[Problems to be Solved] The conventional wide-area cordless telephone system described above has a mode adopted by each of the plurality of wireless connection devices placed in the wireless zone of the wide-area cordless telephone system. The connected device is in call processing acceptance mode (can always receive and respond to control channels), and the wireless connection bag is in call processing acceptance additional mode (can always receive and respond to control channels) and occasionally searches for communication channels while waiting for a control channel. (Always receiving messages but not being able to respond to them) mode was not added.

For this reason, the control channel cannot always be received, and in response to a command from the wireless line controller to change call processing from not accepted to permitted, the control channel can be immediately waited for (receiving the control channel and responding to it). ) state could not be achieved.

The present invention has been made in view of the above problems, and
All wireless connection devices are enabled to always receive the control channel regardless of whether call processing acceptance is permitted or not, and the call processing reception rate j+7 to permission is issued from the wireless line control device so that the control channel waiting state can be quickly changed. An object of the present invention is to provide a wide area cordless telephone system in which a wireless connection device can quickly respond to a control signal from a wireless telephone.

[Means for Solving Problems] In order to achieve the above object, the present invention provides a mode in which each of a plurality of wireless connection devices arranged in a wireless zone of a conventional wide area cordless telephone system performs a communication channel search from time to time while waiting for a control channel. By adding the following modes: a mode in which the wireless connection device is allowed to accept call processing, and a mode in which the wireless connection device occasionally searches for communication channels while waiting for a control channel, it is not possible to accept call processing. Enable to receive control channel,
This makes it possible to quickly respond to a control signal from a wireless telephone when the mode of the wireless connection device is switched according to a command from the wireless line control device.

More specifically, the wide-area cordless telephone system of the present invention includes a plurality of portable wireless telephones each having a multi-channel access unit, which are distributed in a service area in a plurality of groups, and each of the groups is separately installed. A wireless zone is provided in the wireless zone, and a plurality of wireless connection devices capable of wirelessly connecting with the wireless telephones located within this wireless zone and capable of taking any of a plurality of modes including at least a control channel standby mode and a call mode, and a public It is installed as an additional device to a line or a private branch exchange, stores positional information indicating which wireless zone each of the wireless telephones is in, and connects the public line terminal or the extension terminal of the private branch exchange to the wireless telephone based on this positional information. a wireless line control 922 that automatically connects incoming and outgoing calls of +6i wireless telephones within the service area by managing connections with extension terminals of the connecting devices, and controlling channels to be taken by each of the wireless connecting devices; The above modes include a call processing acceptance mode in which the wireless connection device sometimes searches for a communication channel while waiting for a control channel, and a call processing acceptance mode in which the wireless connection device sometimes searches for a communication channel while waiting for a control channel. This method is managed by the connected device.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1(a) is a block diagram showing an embodiment of the wide area cordless telephone system of the present invention, and FIG. 1(b) is a block diagram showing an embodiment of the wide area cordless telephone system of the present invention.
It is a block diagram showing a wireless connection device group (CE-G) in a).

The embodiment shown in FIG. 1(a) includes a plurality of wireless telephones 1,
It is comprised of a group of wireless connection devices 2 that are distributed within a service area and each creates a wireless zone, and a private branch exchange 4 that is connected to a wireless line control device 3 through a plurality of extensions L3. A plurality of office lines L4 are connected to the private branch exchange a4.

The wireless connection device group 2 includes a plurality of S line connection devices i! 121～
24, and each wireless connection type 21 to 24
is connected to the radio line control device 3 through a connection line L1 and a mode control g4 line L2, and the radio connection device 21 switches modes according to instructions from the radio line control device 3.

FIG. 2 is an example of a mode state transition diagram of one wireless connection device. The wireless connection device whose state transition is shown in FIG.
While waiting for a control channel, it sometimes searches for a call channel and updates the memory of free call channels, and there is a mode (A mode) in which call processing cannot be accepted.While waiting for a control channel, it sometimes searches for a call channel and updates the memory of free call channels Updated call processing acceptance mode (C mode) and call mode (S mode).

I am taking them one by one. When the continuous time in the C mode exceeds a certain period of time (timeout), the mode is returned to the A mode. In addition, the mode may be changed from S mode to C mode by skipping A mode, and the range of modes is determined according to instructions from the radio line control device 2.

FIG. 3 shows wireless connection devices 21 to 2 in the wireless connection device group 2.
FIG. 4 is an explanatory diagram showing an example of a state of a combination of four modes.

In state 31, a call is not being made in the wireless zone of the wireless connection device group 2, and the wireless connection device 21 is in the C mode, and the wireless connection devices 22 to ff124 are in the A mode. In this way, normally one wireless connection device in one wireless connection device group 2 is in the C mode. The wireless connection device i! whose location registration signal transmitted by the wireless telephone 1 within the wireless zone of the wireless connection device group 2 is in C mode! 1
21, the radio line controller 3 may poll the radio 1 that brings the radio telephone 1 into its radio zone. Location registration operations from wireless telephones and wireless line control equipment i! By polling from 13.

The radio line control device 3 updates the position information indicating which radio zone of the wireless connection type group 2 the radio telephone fil is located in.

When a call is made or received by the wireless telephone 1 within the wireless zone of the wireless connection device group 2 in state 31, the wireless line control device 3 connects the extension terminal of the wireless connection device 21 to the extension corresponding to the wireless telephone l of the private branch exchange 4. Connect to the terminal. The wireless connection device 21 notifies the wireless telephone l of the stored communication channel, sets the transmission frequency for the communication channel, and shifts to S mode. As a result, the wireless telephone 1 is also set to that communication channel and the communication begins. Until this time, all the wireless connection devices have received the control channel signal from the wireless telephone fit, but only the wireless connection type ff121 can respond. Wireless connection type 2
121, the radio line control device 3 sets the wireless connection device 22 to the C mode via mode control '1; AL2 (state 32).

The wireless connection type 22 shifts to C mode and is permitted to accept call processing, and thereafter can respond to control signals from each wireless telephone. Since the wireless connection device 22 is in the state of receiving the control channel from the time of the A mode when changing from the A mode to the C mode, it can respond quickly. state 32
When the C mode of the wireless connection type 2122 is switched off, the wireless line control type 213 changes the wireless connection device 22 to the A mode via the mode control line L3 in preparation for a problem with the wireless connection type 2122. 23 to C mode (state 33).

[Effects of the Invention] As described above, the cordless telephone system of the present invention has two modes in the wireless connection device group: a call processing acceptance permission mode in which the wireless connection device waits for a control channel and occasionally searches for a call channel; When a wireless connection device that waits for a channel and occasionally searches for a call channel is switched to a call processing unavailable mode. The focal line 'I [can quickly respond to control signals from the stuffing machine, which also leads to improved reliability of the entire system.

[Brief explanation of drawings]

FIG. 1(a) is a block diagram showing an embodiment of the wide area cordless telephone system of the present invention, FIG. 1(b) is a block diagram showing a group of wireless connection devices in FIG. 1(&), and FIG. 1st
An example of the state jE transition diagram of the mode of the wireless connection device in FIG. 3B is an explanatory diagram showing an example of the state of the combination of modes in the wireless connection device group. l: Wireless telephone m (R position) 2: Wireless connection equipment group (CE/G) 3: Radio line control unit (RCU) 4: Private branch exchange (PBX)

Claims (1)

[Scope of Claims] A plurality of portable radio telephones having a multi-channel access function, arranged in a plurality of groups and distributed within a service area, with one radio zone provided for each of the groups; It is possible to wirelessly connect with the above-mentioned telephoneless device within the zone,
A plurality of wireless connection devices capable of taking any one of a plurality of modes including at least a control channel standby mode and a call mode are installed as additional devices of a public line or a private branch exchange, and each of the wireless telephones is installed in which wireless zone. By storing the location information of the wireless telephone and managing the connection between the public line terminal or the extension terminal of the private branch exchange and the extension terminal of the wireless connection device based on this location information, the wireless telephone can make and receive calls within the service area. a wireless line control device that automatically connects a call, and a call processing acceptance mode in which the wireless connection device sometimes performs a call channel search while waiting for a control channel, which each of the wireless connection devices should take; A wide-area cordless telephone system characterized in that the modes, including a mode in which the wireless connection device performs a call channel search and in which call processing is not accepted, are centrally managed by the wireless line connection device.