JPS63252032A - Cordless telephone system - Google Patents

Abstract

PURPOSE:To expand service areas for one radio telephone set to plural radio zones by storing the radio telephone set with the IDs of plural fixed radio equipments and sending out call signals successively. CONSTITUTION:A control part 7 when detecting the calling operation of a user reads out the ID of a fixed radio equipment. Then when a response from the fixed ratio equipment 1 is detected after an origination signal including the ID of the fixed radio equipment is sent out, a channel to the fixed radio equipment 1 is formed as it is and the origination signal is sent to none of other fixed radio equipments 2 and 3. When the response is not detected after the origination signal is sent to the fixed ratio equipment 1, the ID of the fixed radio equipment is changed and the origination signal is sent to other fixed radio equipments 2 and 3 in order.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a cordless telephone that improves the efficiency of using office lines.

(Prior Art) Conventionally, cordless telephones have a connection device (CE) connected to a central office line.
) and a radio telephone (R-set), and when communicating, they mutually check their identification signals (IDs) to prevent erroneous connections. In addition, in this case, the R-position is one CE I
(Problem to be solved by the invention) For this reason, when the R-position is a CE other than one's own, If you move in an area of I couldn't make a call. For this reason, the service area of cordless telephones was narrow and the efficiency of using central office lines was poor.

In order to solve these drawbacks, the present invention stores a plurality of CE IDs in the R-station, improves the efficiency of service area and office line usage, and automatically selects an empty CE when making a call. This allows for phone calls to be connected.

(Means for Solving the Problems) A feature of the present invention is that wireless device identification signals are collated between a plurality of fixed wireless devices connected to a telephone network and the fixed wireless device to enable one-to-one communication. In a cordless telephone system consisting of a plurality of wireless telephones, when a wireless telephone transmits a call request to the fixed wireless device, the call request is sequentially transmitted until each of the plurality of fixed wireless devices receives a response, and then It is a cordless telephone system that allows calls to be made between the fixed radio device that returns the telephone number.

(Example) ■Figure 1 shows an example of the present invention. In the figure, 1, 2 and 3 are fixed wireless devices, and their identification codes (IDs) are A,
Let it be B and e. Reference numeral 4 denotes a mobile radio telephone; 5, 6.7 are constituent elements constituting a control section of the radio telephone 4; respectively, 5 is an electric field level determination section, 6 is a storage section, and 7 is a control processing section.

The operation when the wireless telephone 4 makes a call is as follows. First, when the control unit 7 detects the user's calling operation, the control unit 7 reads the fixed radio device ID from the storage unit 6. At this time, A, B,
If the three IDs of C are stored, for example,
First, a calling signal including ID-A is transmitted to the fixed wireless device 1 (7). At this time, if a response is detected from the fixed wireless device 1 after transmitting the calling signal, the fixed wireless A communication path is formed with the fixed wireless device 1, and the calling signal is not transmitted to the other fixed wireless devices 2 and 3. However, after sending the calling signal to the fixed wireless device 1, no response is detected. If so, I
Change D to B and send the calling signal to the fixed wireless device 2 again. Thereafter, similarly to the above process, if there is no response from the fixed radio device 2, the ID is changed to C and a calling signal is transmitted to the fixed radio device 3. By sequentially changing the ID and retransmitting the calling signal as described above, it is possible to automatically select an empty fixed radio and place a call with a single call operation by the user. becomes.

In the above, various methods can be considered as means for detecting a response from a fixed wireless device, but in this embodiment, the electric field level determination unit 5 in FIG. Detects the presence or absence of radio wave transmission from the machine. In this case, if the wireless telephone 4 transmits the calling signal after confirming that there is no received electric field before transmitting the calling signal, the presence or absence of the electric field can be determined by the presence or absence of a calling response from the fixed wireless device. Detection is possible. The flow of these controls is shown in FIG. In addition to the above-mentioned electric field level determination, this diagram includes control to perform retransmission even when there is no call response.

Note that this embodiment does not claim any special features in the method of calling a wireless telephone from the fixed wireless device side. (-Various known methods can be applied, such as the simultaneous paging method used in Song, and the method of registering the location of wireless telephones to individual fixed wireless devices.

(Effects of the Invention) As explained above, by the wireless telephone storing the IDs of a plurality of fixed wireless devices and sequentially transmitting call signals,
It is possible to extend the service area for one wireless telephone to multiple wireless zones. This makes it possible to expand the service area, and if the area is the same and multiple fixed wireless devices are placed, the large swarm effect will cause the number of wireless devices to exceed the number of fixed wireless devices placed in the same zone. It is possible to realize a configuration in which call loss does not increase even if a telephone is present. Moreover, when making a call, the user only needs to make a single call operation to automatically select an available fixed wireless device and make the call, which is highly effective in terms of serviceability.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an embodiment of the present invention, and FIG. 2 is a diagram showing a control flow of a wireless telephone. 1...Fixed radio device (ID:A), 2...Fixed radio device (
ID:B), 3...Fixed wireless device (ID:C), 4...
- Wireless telephone, 5... Electric field level determination section, 6... Storage section, 7... Control processing section. Patent applicant Nippon Telegraph and Telephone Corporation Patent application agent Patent attorney Megumi Yamamoto - Figure 1 Figure 2

Claims (1)

[Claims] A cordless telephone system consisting of a plurality of fixed radio telephones connected to a telephone network and a plurality of radio telephones that perform one-on-one communication by collating radio identification signals between the fixed radio machines. When transmitting a call request from the wireless telephone to the fixed wireless device, the call request is sent sequentially until a response is received from each of the plurality of fixed wireless devices, and the call request is sent back to the fixed wireless device that has returned the response. A cordless phone system that allows you to make calls.