JPH07131843A - Mobile object telephone system - Google Patents

Abstract

PURPOSE:To set an economical telephone call when a mobile subscriber and a nearby fixed subscriber have a communication through a radio base station including the mobile subscriber and an exchange station including the fixed subscriber. CONSTITUTION:The cellular system mobile object telephone system is provided with a direct line 7 between the radio base station 2a which includes the mobile subscriber 8 and the nearby exchange station 3b which includes the fixed subscriber 9, and the radio exchange station 1 analyzes a called subscriber number at a connection request from the mobile subscriber 8; when the exchange station 3b includes the called subscriber 9, the direction line 7 is set as long as the direct line 7 has a margin of line capacity and the result of channel allocation is reported to the exchange station 3b by using a common line signal device 5a. The channel is set, the connection of the channel is indicated to the radio base station 2a, and the direct line is utilized for the communication between the mobile subscriber 8 and fixed subscriber 9 in contiguous areas.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cellular type mobile telephone, and more particularly to setting up a communication path between a base station and a switching center for a station accommodated by a communication partner.

[0002]

2. Description of the Related Art A conventional cellular mobile telephone system includes a plurality of radio base stations, each of which has a plurality of radio channels and which constitutes a cell, and a radio switching center which controls these base stations and makes a switching connection. The communication lines provided by each radio base station are all set up through an approach link installed between the radio base stations.

Among the communications carried out through this system, communications with subscribers of other exchanges, which are not under the same exchange's jurisdiction, are exchanged from the radio exchange to other exchanges accommodated by the other party. A station or a wireless switching center is connected through an inter-office trunk line.

Further, in the office switching network, a so-called diagonal line connecting two stations having no direct relation to each other is provided in addition to a trunk line connecting in sequence to upper stations directly belonging to it according to the station rank in a multi-stage star shape. In some cases, the economy of the switching network structure may be improved. However, since the radio base station of the mobile telephone system is not an independent exchange, the diagonal line cannot be controlled by itself, and the configuration having the diagonal line cannot be realized.

[0005]

Generally, in a mobile telephone system, the ratio of internal calls between mobile subscribers is low, and most calls are made between mobile subscribers and fixed subscribers. In addition, wireless base stations installed in depopulated areas are often controlled by wireless switching stations installed in distant local cities, but even in this case, most of the calls handled by them are mobile subscribers in depopulated areas. Communication with fixed subscribers.

In such a case, in the conventional system, the call handled by the radio base station is first connected to the radio switching center which controls the radio base station, and then through the inter-office trunk line to the station accommodated by the communication partner. Connected to the exchange. Therefore, a round-trip line between a local city and a depopulated area is used, which is not economical.

[0007]

In order to achieve the above object, the present invention provides a plurality of radio base stations having a plurality of radio channels, and controls and exchanges the plurality of radio base stations via an approach link. In a mobile telephone system formed of a wireless switching center for connection and a central office switching center connected to the wireless mobile switching center, it is provided between a wireless base station and a central office switching center which are geographically adjacent to each other. And a common line signaling device for transmitting and receiving inter-station signals, and based on the analysis of the called party number, the direct line between the called party and the calling party It is characterized by comprising a communication line selecting means for confirming that the line is connected and preferentially allocating the direct line.

[0008]

[Function] By providing a direct line between the locally adjacent radio base station and the central office switching center, the communication between the two base stations can be performed as long as there is a sufficient direct line. Instead of going through, use a direct line.

[0009]

The present invention will be described below with reference to the drawings.

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

The radio exchange station 1 is installed in a local city and controls a plurality of radio base stations 2b, 2c, 2d in the suburbs and a radio base station 2a in a village which is geographically separated. On the other hand, fixed-line subscribers are in the city and its suburbs.
a, it is assumed that a certain village having the radio base station 2a is covered by another exchange switching station 3b. The wireless switching center 1 and the central office switching center 3a, and the central office switching centers 3a and 3b are connected by trunk lines 4a and 4b, respectively. In addition, the exchange 1,
3a and 3b are equipped with common line signaling devices 5a, 5b and 5c, respectively, so that communication and negotiation for setting a communication path between the exchanges 1, 3a and 3b can be performed by a common line signal. Radio switching station 1 and each radio base station 2a, 2b, 2c, 2
Approach links 6a, 6b, 6c, and 6d are provided between d for controlling a radio base station and supplying a communication line. A direct line 7 is installed between the radio base station 2a and the central office switching center 3b in the same village.

[0012] Now, when a mobile subscriber 8 moving to the above-mentioned village slightly away from a local city wants to communicate with a fixed subscriber 9 in the same village, in the conventional method, the approach link 6a and the inter-office trunk are used. Calls are connected using the lines 4a and 4b. In the present invention, when the wireless switching center 1 that has received the connection request analyzes the called party number and finds that the called party 9 is accommodated in the central office switching center 3b connected by the direct line 7,
As long as the line capacity of the direct line 7 has a margin, the line setting using the direct line 7 will be performed. Therefore, the wireless switching center 1 notifies the central office switching center 3b of the channel allocation result using the common line signaling device 5a, and sets the communication path. The wireless base station 2a is also instructed to connect the communication path. If the direct line 7 has no room, the call is connected using the same route as the conventional method.

Next, the case where the fixed subscriber 9 makes a call request to the mobile subscriber 8 will be described. The central office switching center 3b analyzes the called party number, finds out that the central office which accommodates the called party is the wireless central office 1, and makes a connection request by using the common line signaling devices 5c, 5b, 5a. The station 1 is notified, and the communication path using the inter-office trunk lines 4b and 4a is reserved. The radio switching center 1 calls the subscriber 8 to each radio base station under its control, and the mobile subscriber 8 responds to the radio base station 2a to which the mobile subscriber 8 is directly connected.
Know that you are in the jurisdiction of. On the other hand, the wireless exchange 1 sends a ringing tone to the fixed subscriber 9. After this, the wireless switching center 1 checks the usage status of the direct line between the central office switching center 3b and the wireless base station 2a, and if there is a vacancy, the common line signal is used to change the connection and the central office switching center 3b is switched. Negotiate with and change the connection to the direct line 7. When the mobile subscriber 8 is in the service of the radio base station 2d which is not directly connected by the direct line, the mobile subscriber 8 is connected using the same route as the conventional method.

[0014]

As described above, according to the present invention, when a wireless base station installed in a depopulated area is controlled by a wireless switching center installed in a remote local city, a fixed subscriber within the same area can be used. Since the communication between and is directly connected using the line, the economical efficiency can be improved without using the round-trip line between the local city and the depopulated area.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an exemplary embodiment of the present invention.

[Explanation of symbols]

 1 wireless switching center 2a, 2b, 2c, 2d wireless base station 3a, 3b switching center for station 4a, 4b inter-office trunk line 5a, 5b, 5c common line signaling device 6a, 6b, 6c, 6d approach link 7 direct line 8 Mobile subscriber 9 Fixed subscriber

[Procedure amendment]

[Submission date] March 14, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location H04M 3/00 D 8426-5K

Claims (1)

[Claims] 1. A plurality of radio base stations having a plurality of radio channels, a radio exchange station that controls the plurality of radio base stations via an approach link to perform an exchange connection, and is connected to the radio exchange station. In a mobile telephone system composed of a central office switching center, a direct line provided between geographically adjacent radio base stations and the central office switching center, and each central office exchanging signals between offices. It is equipped with a common line signaling device for performing, and based on the analysis of the called number, it is confirmed that the called party and the calling party are connected by the direct line, and the direct line is given priority. And a communication line selecting means assigned to the mobile telephone system.