JPH1127718A - Cordless phone system - Google Patents

Abstract

(57) [Problem] To provide a cordless telephone system capable of setting a distributed standby state to a plurality of base stations when a plurality of mobile devices are concentrated in a region. SOLUTION: Broadcast information editing and transmitting means 8 of a main unit central control unit 5 provided in a cordless telephone control device 1 transmits broadcast information of a standby state based on the number of standby mobile stations of base stations 2a to 2c to mobile stations 3a to 3d. Is reported to the mobile station 3a.
In the following description, the optimum base station is selected by the optimum base station selecting means 15 based on the received electric field level detected by the base station searching means 14 of the mobile station central control unit 12 and the broadcast information. The standby is registered in the selected base station, and a search according to the registration of each base station is always performed. Therefore, even when a plurality of mobile stations 3a to 3d are locally concentrated, mobile stations 3a to 3d can be registered. The standby state is set to be distributed to the plurality of base stations 2a to 2c, and the rejection of a call due to wireless busy can be significantly reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a cordless telephone system having a plurality of base stations and a plurality of mobile stations.

[0002]

2. Description of the Related Art Conventionally, in a cordless telephone system having a plurality of base stations and a plurality of mobile stations, a mobile station waits for a base station having the highest reception level and detects a transmission request by a key operation or a base station. Upon detecting an incoming request from a station,
The base station is notified of a link establishment request, and based on the notification, a communication path is established, and a call is made between the base station and the mobile device through a communication channel having a good reception level.

[0003]

However, in an environment where a plurality of base stations are installed at relatively short distances, when mobile stations are concentrated, even if there are a plurality of base stations,
A standby state may occur concentrated on a specific base station. In this case, if more mobile stations N + α than the number N of communication channels of the specific base station transmit simultaneously, α mobile stations are in a radio busy state, and the transmission is rejected.

[0004] In this case, there has been proposed a method of searching for another base station and transmitting again when a radio busy is detected. However, this method has a problem that the time required for connection is long.

The present invention has been made in view of the above-mentioned current situation of the cordless telephone system, and has as its object to connect a plurality of base stations to a plurality of base stations when the plurality of base stations are locally concentrated. It is an object of the present invention to provide a cordless telephone system that can be distributed to stations and placed in a standby state.

[0006]

A cordless telephone system according to the present invention is connected to a plurality of base stations, a plurality of mobile stations, and the base station, and controls establishment of a communication channel between the base station and the mobile station. A cordless telephone control device, wherein the mobile station receives the broadcast information of the base station and enters a standby state, and the communication channel is established based on an outgoing request from the mobile station or an incoming request from the base station. A cordless telephone system, wherein the cordless telephone control device is provided with a reporting unit for confirming the number of standby mobile stations of each base station and notifying each mobile station as broadcast information indicating a standby state, and the reception electric field level of the base station. Searching means for detecting the broadcast information and the broadcast information; selecting means for selecting an optimal base station based on the broadcast information and the received electric field level; Based on the selection in section, a position registration means for registration of waiting in the base station is provided in the mobile station.

According to the present invention, the number of standby mobile stations of each base station is confirmed by the notification means of the cordless telephone control device, and is notified to each mobile station as broadcast information indicating the standby status. Based on the received electric field level of the detected base station and the broadcast information, the selection unit selects the optimum base station, and the position registration unit registers the standby with the selected base station.
When a plurality of mobile stations are concentrated in a region, these mobile stations are distributed to a plurality of base stations and set in a standby state.

[0008]

DETAILED DESCRIPTION OF THE INVENTION The present invention comprises a plurality of base stations, a plurality of mobile stations, and a cordless telephone control device connected to the base station for controlling the establishment of a communication channel between the base station and the mobile stations. A cordless telephone system in which the mobile device receives the broadcast information of the base station and enters a standby state, and based on an outgoing request from the mobile device or an incoming request from the base station, the communication channel is established; The cordless telephone control device is provided with reporting means for confirming the number of standby mobile stations of each base station and notifying each mobile station as notification information indicating a standby state, and receiving the reception electric field level of the base station and the notification information. Searching means for detecting; selecting means for selecting an optimal base station based on the broadcast information and the received electric field level; and selecting the base station based on the selection by the selecting means. The mobile station is provided with a location registering means for registering a standby state in a station, and even when a plurality of mobile stations are concentrated in a region, these mobile stations are provided with a plurality of mobile stations. It is distributed to the base stations and placed in a standby state.

An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is an explanatory diagram showing the overall configuration of the present embodiment, FIG. 2 is a flowchart showing the operation of the cordless telephone control device of the present embodiment, and FIG. 3 is a flowchart showing the operation of the mobile device of the present embodiment. .

In the present embodiment, as shown in FIG. 1, a plurality of base stations 2a, 2b, 2c, and these base stations 2a to 2c
And a plurality of mobile units 3a, 3b, 3c and 3d. The cordless telephone control device 1 includes an information transmission line 4 connected to the base stations 2a to 2c, and a main device central control unit 5 connected to the information transmission line 4. The main device central control unit 5 includes: The location information analysis means 6 for analyzing location registration messages from the mobile stations 3a to 3d, the location management memory 7 for storing the number of standby mobile stations for each base station, and the information in the location management memory 7 are edited as part of the broadcast information. A notification information editing and transmitting means 8 for instructing transmission is provided.

The plurality of mobile units 3a to 3d have the same configuration.
As for the mobile device 3a, the wireless transmission unit 1
0 and the wireless receiving unit 11 are connected in parallel with each other, and the mobile terminal central control unit 12 is connected to output terminals of the wireless transmitting unit 10 and the wireless receiving unit 11. This mobile unit central control unit 1
2 includes a position registration unit 13 for performing position registration with respect to a standby base station, a base station search unit 14 for searching for a radio wave from the base station received by the wireless reception unit 11, a reception level and a standby state of the base station. An optimum base station selecting means 15 for determining the number of mobile stations and selecting an optimum base station is provided. The optimum base station selecting means 15 includes a base station information management memory 16 for storing a reception level and the number of standby mobile stations for each base station, and an optimum base station condition storage memory 17 for storing optimum base station conditions. ing.

The operation of this embodiment having such a configuration will be described. In the optimal base station condition storage memory 17 of the mobile device 3a, data of the optimal base station condition data such as a reception level of −70 dBm or more and a standby mobile device number of 3 or less are stored in advance as conditions of base stations to be on standby. Is stored.

[0013] The cordless telephone control device 1 has mobile units 3a to 3a.
When the location registration is received from 3d (step S01), the location information analyzing means 6 of the main device central control unit 5 registers the number of mobile stations waiting for the base station which has received the location registration in the location management memory 7 (step S02). ).

For example, when the mobile station 3b transmits a location registration to the base station 2c, the base station 2 in the location management memory 7
The number of waiting mobile devices in c is counted up. Also,
The information that the mobile station 3b is waiting for the base station 2c is also managed, and when the mobile station 3b registers the position again with another base station, the number of the standby mobile stations of the base station 2c is counted down. You.

Further, in order to notify the mobile units 2a to 2c of the change in the number of standby mobile units, the main unit central control unit 5
The content of the location management memory 7 is edited into the broadcast information by the broadcast information editing and transmitting means 6, and the broadcast information is notified to the base stations 2a to 2c via the information transmission path 4, and the mobile station 3a is transmitted from the base stations 2a to 2c.
3d is notified of the notification information (step S03).

Next, when the mobile station 3a receives the broadcast information from the base station (step S11), the number of standby mobile stations of each base station is extracted from the broadcast information, and the extracted number of mobile stations is calculated based on the base station information. Registered in the management memory 16 (step S
12), the optimum base station selecting means 14 compares the number of mobile stations and the reception level of the base station where the mobile station 3a is waiting with the registration conditions of the optimum base station condition storage memory 17 (step S13).

If the base station that the mobile station is waiting for satisfies the condition of the optimal base station, the standby state of the current base station is continued (step S14). If the condition of the optimal base station is not satisfied, the base station is searched. By means 14, the radio receiving unit 1
1 is requested to search for another base station (step S15). Then, the search result is determined (step S
16) When another base station is selected, the optimum base station selecting means 14 again compares the number of standby mobile stations of the base station and the reception level with the registration conditions in the optimum base station condition storage memory 17 (step S17). If the condition of the optimal base station is satisfied, the position registration unit 13 transmits the position registration to the base station via the wireless transmission unit (step S).
18), the standby state is changed to the base station (step S)
19).

If the condition of the optimum base station is not satisfied, another base station is searched again by the base station search means 14, and if the base station cannot be searched, the base station waits for the current base station (step S20).

In the cordless telephone control device,
The operation can be performed smoothly by storing the maximum number of standby mobile stations per base station in advance in the position management memory 7.

[0020]

According to the present invention, the reporting means of the cordless telephone control device confirms the number of standby mobile stations of each base station, and notifies the mobile stations as broadcast information indicating the standby status. Based on the reception electric field level and the broadcast information of the base station detected by the means, the optimum base station is selected by the selection means, and the standby registration is performed by the position registration means at the selected base station.
Even when a plurality of mobile devices are concentrated in a region, these mobile devices are distributed to a plurality of base stations and set in a standby state, so that it is possible to greatly reduce the possibility that a call is rejected due to a wireless busy. .

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an overall configuration of an embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the cordless telephone control device according to the embodiment;

FIG. 3 is a flowchart showing the operation of the mobile device according to the embodiment;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 cordless telephone control device 2 a-2 c base station 3 a-3 d mobile device 4 information transmission line 5 main device central control unit 6 location information analysis means 7 location management memory 8 broadcast information editing and transmission means 10 wireless transmission unit 11 wireless reception unit 12 mobile Central control unit 13 Location registration means 14 Base station search means 15 Optimal base station selection means

Claims (1)

[Claims] 1. A cordless telephone controller connected to a plurality of base stations, a plurality of mobile stations, and the base station for controlling establishment of a communication channel between the base station and the mobile station. A cordless telephone system in which the communication channel is established on the basis of a call request from the mobile station or an incoming call request from the base station. A checking means for confirming the number of devices and notifying each mobile device as notification information indicating a standby state is provided in the cordless telephone control device, and a search means for detecting a reception electric field level of the base station and the notification information, Selecting means for selecting an optimal base station based on the broadcast information and the received electric field level; and registering a standby state with the base station based on the selection by the selecting means. A cordless telephone system, wherein a location registration means for making a record is provided in the mobile device.