JPH04822A - Radio telephone system - Google Patents

Abstract

PURPOSE:To prevent the collision of simultaneousy incoming call signals between two zones even when the two zones are overlapped by receiving the signals at a radio receiver while alternately scanning two control signals on standby, and varying the transmission frequencies of the control channels in two zones. CONSTITUTION:A main equipment (ME) 100 turns a connector (CE) 210 in a zone 27 and a connector CE 240 in a zone Z2 to the standby state so as to originate/terminate a call, and the other CE is set on standby for a waiting state. Therefore, even when the plural CE simultaneously use the same channel in the same zone, the collision of radio waves can be prevented. When the incoming call signal comes from a connecting line 161 to the CE 210, the incoming call signal passes through a hybrid 211 and is detected by a control part 213. When the incoming call signal is detected, the control part 213 transmits the incoming call signal from a transmitter/receiver 212 to cordless telephone sets 310-360. When the incoming call signal comes from a connecting line 164, the CE 240 also similarly transmits the incoming call signal.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a wireless telephone system, and more particularly to a wireless telephone system having two zones in which wireless service is provided.

[Conventional technology]

An example of a two-zone configuration in a conventional wireless telephone system is shown in FIG. 7 and will be described.

In the figure, 100 is a main device (IVI:) that controls the entire system, and 410 to 460 are connecting devices (CE) that are controlled to be connected to MEloo and wirelessly connect to cordless telephones 510 to 560.

CE410. CE4”20.CE430 is zone Zl,
CE440. CE450. CE460 covers zone Z2. 510-560 are cordless telephones (R setting)
It can be used in either zone Zl or zone z2. 1
71 to 173 are external subscriber lines connected to MEloo,
Connection lines 161 to 166 connect MEloo and CEs 410 to 460.

Next, the operation of the conventional example shown in FIG. 7 will be explained.

First, MEloo is CE410 in zone z1 and zone z
The second CE 440 is placed in a standby state in which calls can be made and received, and the other CEs are placed in a standby state. This is to avoid radio waves colliding when multiple CEs use the same control channel at the same time in the same zone.

When an incoming call signal comes from the subscriber line 171, MEloo detects the incoming call signal and sends the detected incoming call signal to CE4, which is waiting for the incoming call signal.
10. Send to CE440. When the CE 410.440 receives an incoming call signal from the connection lines 161, 164, it sends the incoming call signal to the cordless telephones 510-560 from its transceiver #2.

Figure 8 shows CE410 in standby mode. This is a diagram for explaining the state in which an incoming call signal is sent from the CE 440. In this conventional example, the CE 410 in zone Z1 and the CE 440 in zone Z2
The same 46 channels are simultaneously set to R and 510. R place 520
．． R place 530 R place 540. R place 550. A call signal is sent in turn to inform the cordless telephones 510 to 560 that there is an incoming call. This indicates which zone the cordless telephones 510 to 560 are in.
This is because it is not clear in oo, and all cordless telephones from both zones are called at the same time.

When the cordless telephones 510 to 560 are on standby and are not making a call, their transmitters and receivers receive control channels 46 at a period T shown in FIG. In the case of Fig. 7, R position 510° R position 520 or V'-n z1 (7) CE
Upon receiving the incoming call signal from 410, R station 550. R station 560 receives an incoming call signal from CE 440 in zone z2. However, if zone Z1 and zone z2 cross,
As for the R station 530 and the R station 540 between these, the incoming call signals from zone Z1 and zone Z2 are on the same channel, so they may conflict and cannot be received.

[Problem to be solved by the invention]

In the conventional wireless telephone system described above, only one control channel is used for two zones, so if the zones overlap, the incoming call signal will collide with the R location between them, making it impossible to receive a call. There are drawbacks.

[Means to solve the problem]

In the wireless telephone system of the present invention, there are two zones in which wireless service is provided, and two out of a plurality of predefined control channels are assigned to each of the zones, so that calls can be made within the two zones. at least one radiotelephone that alternately scans the two control channels assigned to each of the zones while in standby; and at least one radiotelephone located in each of the zones and wirelessly connected to the radiotelephone. a connection device that simultaneously sends out incoming call signals on each of the control channels assigned to the zone in which the incoming call is received;
A main device is provided that controls these connection devices and controls the connection between an outside line or an extension line and the radio telephone.

The main device and the connection device may be connected by wire.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention.

In FIG. 1, 100 is a main device (ME) that controls the entire system, and 210 to 260 are connection devices (CE) that are controlled to be connected to MEloo and wirelessly connect to cordless telephones 310 to 360.

CE210. CE220. CE230 is zone Zl, C
E240-CE250. CE260 covers zone Z2. 310-360 are cordless telephones (R setting)
It can be used in either zone Zl or zone z2. 1
71 to 173 are external subscriber lines connected to MEloo,
Connection lines 161 to 166 connect MEloo and CEs 210 to 260. As control channels, 46CH is used in zone Z1 and 89CH is used in zone Z2.

Next, the operation of the embodiment shown in FIG. 1 will be explained.

First, MEloo is CE210 in zone Z1 and zone Z
The second CE 240 is placed in a standby state in which calls can be made and received, and the other CEs are placed in a standby state. This is to avoid radio waves colliding when multiple CEs use the same control channel at the same time in the same zone.

The configuration of MEloo is shown in FIG.

When an incoming call signal comes from the subscriber line 171, the outside line interface 101 detects the incoming call signal, and the control line 181 notifies the control unit 131 of the incoming call. The control unit 131 has a CE interface 121 connected to the CE 210 on standby, and a connection A to the CE 240 on standby.
An incoming call signal is sent to the E interface 124 via the control line 182. When the CE interfaces 121 and 124 receive this incoming signal, they transmit the incoming signal to the CE 210 through the connection lines 161 and 164. Send to CE240.

FIG. 3 is a block diagram of the connection device 210.

When an incoming call signal comes to the CE 210 from the connection line 161, the incoming call signal passes through the hybrid 211 and is detected by the control unit 213. When the control unit 213 detects an incoming call signal, the transmitter/receiver 212 transmits the cordless telephones 310 to 3.
An incoming call signal is sent to 60. CE240 also has connection line 16
When an incoming call signal comes from 4, the incoming call signal is sent out in the same way.

Figure 5 shows CE210 in standby. This is a diagram for explaining the state in which an incoming call signal is sent from the CE240. In this embodiment, the CE210 in zone Z1 has 46CH, and the CE210 in zone Z2
CE240 uses 89CH and at the same time R position 310.
R location 320, RTE location 330. R place 340. R place 350
．． An incoming call signal is sent to the R station 360 in turn to notify the cordless telephones 310 to 360 that there is an incoming call. This is because MEloo does not know which zone the cordless telephones 310 to 360 are in, and calls all cordless telephones from both zones simultaneously.

FIG. 4 is a block diagram of cordless telephone 310.

Cordless telephones 320 to 350 also have the same configuration. When the cordless telephones 310 to 360 are on standby, the transmitter/receiver 311 receives control channels 46CH and 89CH at a period T shown in FIG. 6 under the control of the control unit 312.

This is because the cordless telephone itself does not know which zone it is in, and by receiving both control channels in this way, it is in zone Zl.

It is possible to receive data from either zone Z2. In the case of FIG. 1, the R station 310° and the R station 320 receive an incoming call signal from the CE 210 in zone Z1, and the R station 350.
R station 360 receives an incoming call signal from CE 240 in zone Z2. The R station 330 and the R station 340 located between the zone Z1 and the zone Z2 can receive the incoming call signal of either CE, but the cordless telephones 330 and 340 first receive the incoming call signal as explained in FIG. Control channel 46CH divided.

Since it is receiving 89CH, RTE L 330 or 8
When receiving an incoming call signal when receiving 9CH, R place 33
0 is connected to the CE 240, and when the R station 340 receives an incoming call signal on 46CH, it is connected to the CE 210.

〔Effect of the invention〕

As explained above, according to the present invention, the wireless telephone alternately scans and receives two control channels during standby, and by making the transmission frequencies of the control channels different in the two zones, the two zones overlap. Even in such a case, collision of simultaneous incoming call signals between two zones can be prevented.

Furthermore, since the incoming call signals are sent out simultaneously in the two zones, there is an effect that the connection time can be shortened.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a block diagram of the main device (ME) 100 in FIG. 1, and FIG. 3 is a block diagram of the connecting device (CE) 210 in FIG. 1. , FIG. 4 is a block diagram of the cordless telephone set 310 in FIG. 1, FIG. 5 is a diagram for explaining the state in which an incoming call signal is sent in the embodiment shown in FIG. Similarly, FIG. 7 is a block diagram showing an example of a conventional wireless telephone system, and FIG. 8 is a diagram for explaining the reception operation of a cordless telephone, and FIG. 8 explains a state in which an incoming call signal is sent in the conventional example shown in FIG. FIG. 9 is also a diagram for explaining the receiving operation of the cordless telephone. 100... Main equipment (ME), 161-166... Connection line, 171-173... Subscriber line, 210-260
... Connection device (CE), 310-360 ... Cordless telephone (R position), Zl, z2- ... Zone.

Claims (1)

[Claims] 1. There are two zones in which wireless service is provided, and two out of a plurality of predefined control channels are assigned to each of the zones, and communication is carried out within the two zones. at least one radiotelephone that alternately scans the two control channels assigned to each of the zones while in standby; and at least one radiotelephone located in each of the zones and wirelessly connected to the radiotelephone. a connection device that simultaneously sends out an incoming call signal on each of the control channels assigned to the zone where the call is received; and a connection device that controls these connection devices to control the connection between an outside line or extension and the wireless telephone. What is claimed is: 1. A wireless telephone system characterized by comprising a main device for performing 2. The wireless telephone system according to claim 1, wherein the main device and the connecting device are connected by wire.