JPH05115084A - Inter-station speech channel changeover control system - Google Patents

Abstract

PURPOSE:To reduce the scale of an inter-station speech channel changeover control by making the measurement request of an electric field strength of a radio base station only for a service area to which a radio mobile station is going to be moved and selecting the inter-station speech channel based on the electric field strength. CONSTITUTION:When a mobile radio station 9 in the service area of a radio exchange station 1 moves from a position A to a position B, communication deterioration notice information and registered radio exchange station list information TA stored in a memory 10 are sent to a cell site 5. An electric field strength measurement request discrimination device 13 compares the registered radio exchange station list information TA received by a transmitter- receiver 12 with adjacent radio exchange station list information TB stored in advance. The radio exchange station 1 makes an electric field strength measurement request to radio exchange stations 2, 4 whose numbers 20, 40 are coincident, Then the inter-station channel changeover control to connect the line of any of the radio exchange stations 2, 4 whose measured electric field strength is higher and the mobile radio station 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applied to a mobile communication system, requests measurement of electric field strength only to a radio exchange station notified from a mobile radio station, and based on the electric field strength, an inter-station communication is performed. The present invention relates to an inter-station speech channel switching control method for controlling speech channel switching.

[0002]

2. Description of the Related Art Conventionally, in an inter-station call channel switching control system in a cellular mobile communication system or the like, a wireless mobile station such as an automobile telephone or a portable radio telephone is moved, so that a radio link with a radio base station is used. Communication quality is degraded. In this case, the wireless switching center connected to the wireless base station and receiving this communication quality deterioration information sends a request for measuring the electric field strength to all the neighboring wireless base stations stored in the own wireless switching station or specified by the station data. To do. Then, the communication channel switching control between stations is performed by this electric field strength.

[0003]

As described above, in the conventional inter-station communication channel switching control method of the conventional example, the measurement of the electric field strength is requested to all the adjacent radio base stations stored in the radio exchange station or designated by the station data. It is carried out. Therefore, even a wireless base station in a service area where the wireless mobile station is not scheduled to move makes a request to measure the electric field strength,
Therefore, there is a drawback that the control scale increases.

Further, when the inter-station communication channel switching control is performed after requesting the measurement of the electric field strength to all the adjacent radio base stations designated by the station data, the public communication system is charged as the control scale increases. It will be.

An object of the present invention is to solve such a problem, and a wireless mobile station can request the measurement of the electric field strength of only a radio base station within a service area where the mobile station is scheduled to move. Another object of the present invention is to provide an inter-station speech channel switching control method that can reduce the inter-station speech channel switching control scale by switching the inter-station speech channel.

[0006]

According to the present invention, a mobile radio station, a plurality of radio base stations that control the operation of the mobile radio station within its own service area, and the plurality of radio base stations are connected to each other. An inter-station speech channel switching control system having a plurality of wireless switching stations and performing field-to-station speech channel switching control by measuring electric field strength, wherein a mobile wireless station is a wireless base station within a service area to be moved. Storage means for storing the registered wireless switching center list information of the number of the wireless switching center to which is connected, and transmitting means for transmitting the communication deterioration information and the registered wireless switching center list information in the communication with the wireless base station by the call channel wave. And a wireless switching center, a wireless base station that receives a communication channel wave including communication deterioration information and registered wireless switching center list information, and storage means that stores adjacent wireless switching center list information, Recording wireless switching center list information and adjacent wireless switching center list information are compared with each other, and field strength measurement requesting means for requesting measurement of the electric field strength only to the matching wireless switching center is provided. Is.

Further, the radio switching station is characterized in that the electric field strength measurement requesting means requests the measurement of the electric field strength and controls the switching of the inter-station communication channel so as to select the radio switching station having the largest electric field strength. It is what

Further, the inter-station speech channel switching control is characterized in that it is applied to a cellular mobile communication system.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an inter-station communication channel switching control system of the present invention will be described below with reference to the drawings.

FIG. 1 shows the configuration of the embodiment.

In FIG. 1, this example shows a cellular mobile communication system in which wireless switching center 1, wireless switching center 2, wireless switching center 3 and wireless switching center 4 each having an adjacent service area are connected by a wired line. Is.

The wireless switching center 1, the wireless switching center 2, the wireless switching center 3 and the wireless switching center 4 respectively include a cell site 5, a cell site 6, a cell site 7 and a cell site 8 which are wireless base stations. It is connected.

A mobile radio station 9, which is a car telephone installed in a car, is moving within the service area of the radio lines of the cell sites 5, 6, 7, and 8. This mobile radio station 9
Is the registered wireless switching center list information [T that has a number obtained by roughly encoding the identifier of the wireless switching center in the service area to be moved.
A] is provided for storing the memory 10].

FIG. 2 shows this registered wireless switching center list information [T
A] is shown.

In FIG. 2, the registered wireless exchange station list information [TA] stores numbers [20, 40] of the wireless exchange stations 2 and 4, which are substantially encoded respective identifiers.

A transmission / reception device 11 is arranged in the cell site 5, and a transmission / reception device 12 and an electric field strength measurement request determination device 13 are provided in the wireless switching center 1.

The electric field strength measurement request determination device 13 includes:
Adjacent wireless switching center list information [TB] is stored.

FIG. 3 shows this neighboring wireless switching center list information [T
B] is shown.

In FIG. 3, the adjacent radio exchange station list information [TB] is a number [20, which is a substantially encoded version of each identifier of the radio exchange station 2, the radio exchange station 3 and the radio exchange station 4].
30, 40] are stored.

The wireless switching center 2 is also provided with an electric field strength measurement request determination device 14, and the wireless switching center 4 is also provided with an electric field strength measurement request determination device 15.

The radio switching stations 1, 2, 3, 4 and the cell sites 5, 6, 7, 8 have the same structure. That is, a transmitter / receiver (11, 12) and an electric field strength measurement request determination device (13, 14, 15), which are not shown, are provided respectively. Then, even when the mobile radio station (9) is connected to any one of the radio exchange stations (1, 2, 3, 4), the radio exchange station (1,
The so-called cellular mobile communication system is configured to request the measurement of the electric field strength only to 2, 3, 4) and control the switching of the communication channel between the stations.

Next, the operation of this configuration will be described.

FIG. 4 shows a processing procedure of an operation for requesting the measurement of the electric field strength only to the radio exchanges 2 and 4 notified from the mobile radio station 9 and controlling the switching of the inter-station communication channel. There is.

The mobile radio station 9 traveling within the service area of the radio switching center 1 travels from the position [A] to the position [B]. The movement to the position [B] deteriorates the communication quality of the communication channel between the mobile radio station 9 and the radio exchange station 1. Due to this deterioration, the mobile wireless station 9 transmits communication deterioration notification information to the cell site 5 together with the registered wireless switching center list information [TA] stored in the memory 10 (process step (S) 10).

The cell site 5 which has received the communication deterioration notification information sends out the registered wireless switching center list information [TA] and the communication deterioration notification information from the transmitter / receiver 11 in the cell site 5 (S11). The electric field strength measurement request determination device 13 compares the registered wireless switching center list information [TA] received by the transmitting / receiving device 12 with the neighboring wireless switching center list information [TB] stored in advance.
(S12).

In this case, the registered wireless switching center list information [T
The number [20,40] of A] is compared with the number [20,30,40] of the list information [TB] of neighboring wireless exchange stations stored in advance, and the wireless exchange of the number [20,40] that is matched in this comparison is performed. A field strength measurement request is made from the wireless switching center 1 to the station 2 and the wireless switching center 4 (S13).

Thereafter, inter-station communication channel switching control is performed to connect the mobile radio station 9 and the radio exchange station 2 having the larger measured electric field strength to the mobile radio station 9 (S14). ..

[0028]

As is apparent from the above description, according to the inter-station communication channel switching control method of the present invention, the registered wireless switching center list information and communication deterioration information of the wireless base stations within the service area to be moved are wirelessly transferred. Then, the wireless switching center compares the received registered wireless switching center list information with the adjacent wireless switching center list information, and requests the corresponding wireless switching center that matches the electric field strength measurement. As a result, the wireless mobile station can request the measurement of the electric field strength of only the radio base station in the service area to be moved, and the inter-station communication channel switching control can be reduced by switching the inter-station communication channel based on the electric field strength. Has the effect. In addition, the reduction of the control scale reduces the charges when using the public communication system.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration in an embodiment of an inter-station communication channel switching control system of the present invention.

FIG. 2 is a diagram showing registered wireless switching center list information stored in a memory of a wireless mobile station according to an embodiment.

FIG. 3 is a diagram showing neighboring wireless switching center list information stored in the wireless switching center in the embodiment.

FIG. 4 is a flowchart showing a processing procedure of an operation in the embodiment.

[Explanation of symbols]

 1,2,3,4 Radio switching station 5,6,7,8 Cell site 9 Mobile radio station 10 Memory 11,12 Transceiver 13,14,15 Field strength measurement request determination device [TA] Registered radio switching station list information [TB] Adjacent wireless switching center list information

Claims (3)

[Claims] 1. A mobile radio station, a plurality of radio base stations for controlling the operation of the mobile radio station within a self-service area, and a plurality of radio switching stations to which the plurality of radio base stations are respectively connected. Along with, there is also an inter-station speech channel switching control method for measuring inter-station speech channel switching control by measuring an electric field strength, wherein the mobile radio station is a radio switching station to which a radio base station in a service area to be moved is connected. Storage means for storing the registered wireless switching center list information of the number, and a transmission means for transmitting the communication deterioration information in the communication with the wireless base station and the registered wireless switching center list information in the communication channel wave, The wireless switching center receives a communication channel wave including the communication deterioration information and the registered wireless switching center list information, and a storage unit that stores adjacent wireless switching center list information,
And a field strength measurement requesting unit that compares the registered wireless switching center list information with the neighboring wireless switching center list information and requests a measurement of the electric field strength only to the matching wireless switching center. Inter-channel call channel switching control method 2. The wireless switching center performs switching control of an inter-station communication channel so that the field strength measurement requesting means requests the measurement of the electric field strength and selects the wireless switching center having the largest electric field strength. An inter-station speech channel switching control system according to claim 1. 3. The inter-station speech channel switching control system according to claim 1, wherein the inter-station speech channel switching control is applied to a cellular mobile communication system.