JPH0329525A - Control system for cordless telephone set - Google Patents

Abstract

PURPOSE:To evade the interrupt of talking in case of moving to other service area during talking by providing plural radio connection equipments corresponding one to one to portable equipments for each service area, and assigning a different specific channel to each portable equipment. CONSTITUTION:A line controller 3 monitors a reception level of all radio connection equipments 5cA, 5cB, 5cC and sends a radio transmission strop instruction to the radio connection equipment 5cA to interrupt a channel to the radio connection equipment 5cA when the radio connection equipment switching condition is reached. Then, after the reception of an instruction, the radio connection equipment 5cA reaches the reception level monitor state. Then, the line controller 3 sends a radio transmission start instruction to the radio connection equipment 5cB to connect the channel to the radio connection equipment 5cB. Then after the reception of the instruction, the radio connection equipment 5cB starts the transmission through a radio line and a portable equipment 6c and the radio connection equipment 5cB are connected by a radio line 7c'. Thus, even in the movement within plural service areas, talking is attained without notifying the service area.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Technical Field of the Invention The present invention relates to a control method for continuing a call in a multi-zone cordless telephone device when a mobile device during a call moves between multiple service areas. It is something.

(2) Prior art and its problems When a multi-zone cordless telephone device is used in an office, factory, or other premises, the portable device may move between multiple service areas. In this case, if the caller leaves the service area where the call was started, it is customary to interrupt the call, make a re-call, and then start the call again. Therefore, it is impossible to continue the call, which is extremely inconvenient in practical terms. (3) Purpose of the Invention The present invention provides a control method for a cordless telephone device that allows the call to continue without interruption when the call is transferred to another service area during a call in one service area. be.

(4) Structure and operation of the invention In the present invention, each service area has a one-on-one connection with a mobile device.
The above objective is achieved by providing a corresponding wireless connection device and assigning a different unique channel to each mobile device. FIG. 1 is a diagram showing an example of the configuration of a multi-zone cordless telephone device. As shown in the figure, a line control device 3 is connected to the exchange 1 by a wire (telephone subscriber line) 2, wireless connection devices 5aA to 5cC are connected to the line control device 3 by a wire line 4, and wireless lines 7a to 7c. By wireless connection device 5aA+ 5bC+
It is configured by portable devices 68 to 6c connected to 5cA.

The portable device 6a is connected to the wireless connection device 5a in the service area A.
In service area B, it is possible to connect only to wireless connection device 5aB, and in service area C, it is possible to connect only to wireless connection device 5aC. Next, the portable device 6b can be connected only to the wireless connection device 5bA in the service area A, the wireless connection device 5bB in the service area B, and only the wireless connection device 5bC in the service area C. Furthermore, the mobile device 6c is connected to the wireless connection device 5 in the service area A.
Can only be connected to cA, wireless connection device 5cB in service area B, and wireless connection device cbC in service area C.
It is possible to connect only to Wireless line channels 7a, 7b, and 7c used to connect the mobile device and the wireless connection device
are uniquely assigned to each portable device 6a, 6b, 6c. In other words, different mobile devices do not use the same channel.

2 and 3 are flowcharts showing an example of the operation of the line control device 3 according to the present invention. The operation of the control system according to the present invention will be explained with reference to FIGS. 1 to 3. As an example, a case will be described in which the portable device 6c moves to the service area B as indicated by the bold line arrow during a call in the service area A.

(a) At the start of a call, the second portable device 6C is connected to the wireless connection device 5cA via the wireless line 7C. At this time, the wireless connection device 5cB in service area B and the wireless connection device 5cC in service area C start monitoring the level of the same reception channel as the wireless connection device 5cA. (El) When the portable device 6c starts moving from the service area A to the service area B, the reception level of the wireless connection device 5cA decreases, and the reception level of the wireless connection device 5cB increases.

(C) When the reception level of the wireless connection device f5cA becomes smaller than a certain value and the reception level of the wireless connection device f5cB becomes larger than a certain value, the line control device 3 performs a wireless connection device switching operation. In other words, line control The device 3 monitors the reception levels of all the wireless connection devices 5CA, 5cB, and 5cC, and when a wireless connection device switching condition is reached,
A wireless transmission stop command is sent to the wireless connection device 5cA, and the communication path to the wireless connection device 5cA is cut off. After receiving the command, the wireless connection device 5cA enters a reception level monitoring state. Next, the line control device 3 sends a wireless transmission start command to the wireless connection device 5cB, and connects a communication path to the wireless connection device 5cB. After receiving the command, the wireless connection device 5cB starts transmitting via the wireless line, and connects the mobile device 6C and the wireless connection device 5c.
B is connected by a wireless line 7c1.

(2) When the call on the mobile device 6C ends, the line control device 3
sends a reception level monitor stop command to all wireless connection devices 5cA, 5cB, and 5cC, and all wireless connection devices 5
cA, 5cB, and 5cC stop monitoring the reception level and enter a state of waiting for a call signal from the portable device 6c. This wireless connection device switching operation is entirely performed automatically, and there is no need for the caller to perform any operation.

(5) Effects of the Invention According to the present invention, it is possible to make a call without being aware of the service areas even when moving between a plurality of service areas, which is very effective in practice.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an example of the structure of a multi-zone cordless telephone device, and FIGS. 2 and 3 are flowcharts showing the control operation of the present invention. DESCRIPTION OF SYMBOLS 1... Exchange, 2... Subscriber line, 3... Line control device, 4... Wired line, 5aA~5cC・
...Wireless connection device, 6a-6c...Mobile device, A...
- Wireless connection devices 5aA, 5bA. 5cA service area, B...service area of wireless connection devices 5aB, 5bB, 5cB, C...wireless connection device 5aC. Service areas of 5bC and 5cC, 7a to 7c... Wireless line, 7c'... Wireless line of portable device 6C after movement.

Claims (1)

[Claims] In a multi-zone cordless telephone device, each service area is provided with multiple wireless connection devices that correspond one-to-one with a mobile device, and each mobile device is assigned a different unique channel. is configured to automatically switch to a corresponding one of the plurality of wireless connection devices in the destination service area to continue the call when the person moves from one service area to another. A control method for a cordless telephone device characterized by the following.