JPS59165535A - Repeating exchange system for mobile communication system - Google Patents

Abstract

PURPOSE:To improve the reliability of a repeating connection by decentralizing the repeating exchange control circuits of a control station. CONSTITUTION:The start given from a distributing subscriber line A is detected by a control circuit (not shown in the diagram), and one of plural idle outgoing trunk lines 35 is selected and connected. Then the corresponding cross point is closed, and therefore a trunk line connecting device 33 is started via the line 35. The actuated device 33 starts a trunk line 34 and also sends a call signal for mobile station sent from the subscriber line A to the line 34. When an answer is received from a mobile station (not shown in the diagram), the answer signal is received at another control station (not shown in the diagram). Then an answer start is sent back to the line 34 and then sent to the line A. The closure of the corresponding cross point is held by either one or both of the start for line A and the answer start.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a relay switching system (C) for a relay exchange that relays calls in a mobile station communication system.

FIG. 1 is a diagram illustrating the arrangement of control stations and mobile station calling.

A to E are control stations, and 11 is a subscriber, which is connected to control station A, and the control stations are connected by trunk lines as shown in the figure. 1
A mobile station 2 is connected to a base station to which each control station belongs via a radio link. A call from subscriber 11 is relayed from control station A to other control stations B to E, and all base stations send out a signal to select mobile station 12. When mobile station 12 responds, the line to which the response was received is The trunk line connections used for other calls were restored, leaving only the subscriber 11. A mutual conversation is made with the mobile station 12. In this way, the mobile station paging signal must be sent from all base stations because the amount of movement and position is unknown.

FIG. 2 shows a relay exchange configuration of a conventional control station.

FIG. 2 is a relay exchange configuration diagram of a control tII station A corresponding to FIG. 1; A is a subscriber line to which a mobile station output signal is sent from a translator (not shown) via a trunk (not shown). B, C, D, 19 bidirectional trunk lines connected to relay connection equipment that connects to trunk lines to EU and other control stations. a is a base station line connected to the affiliated base station.

AB, AC, Aa, AE, and AD are cross points that operate when there is a discharge from the 1111 subscriber line A, and the mobile station discharge signal from the subscriber line A is relayed to each control station B to E. At the same time, it is relay-connected to the base station line a of the control station A. Relaying calls from other control stations is performed as follows. For example, when there is a call from control station B, Ba, BD
The mobile station paging signal is relayed to the control station and is also relayed to the base station line a of the control station A. If there is a trunk line between control station B and control station C, cross point BDtd does not exist.

The relay exchange configurations of other control stations are also similar, and their operations are exactly the same as described above.

In such a relay exchange configuration, the number of control stations increases by one more than the planned number,
There are drawbacks to increasing the number of trunk lines, such as replacing the trunk exchange or spending a lot of effort on remodeling.

Another disadvantage was that all relays could not be replaced due to failure of the control circuit.

In order to solve these drawbacks, the present invention is characterized by distributing the relay exchange control circuit of the control station.

Its purpose is to increase the reliability of relay connections.

Furthermore, even when an unexpected increase in control stations is added, the additional equipment operates independently of the others, so that the addition can be done extremely easily.

The line connecting the control stations is generally a bidirectional connection and is an extremely expensive line.

Also, if the control stations are different, they are connected via another control station. Furthermore, since the location of the mobile station is unknown, it is necessary to send mobile station paging signals from all base stations from the subscriber.

Further, with the system of the present invention, a subscriber call from a mobile station can be relayed to a predetermined control station by adding a relay code or the like at the same time as the relay is activated. This system is limited to relaying calls from subscribers to mobile stations.

FIGS. 3 and 4 show an embodiment of the present invention. FIG. 3 shows a trunk line switching device and a trunk line connection device, where A is a distribution subscriber line, a is a distribution base station line, 34 is a bidirectional trunk line, and 33
35 is a trunk line connecting device having an incoming relay and a Yamanaka line terminal and having a function of detecting activation to or from another control station; 35 is an outgoing trunk line;

36 is an incoming trunk line; 31 is a trunk line switching device that connects the distribution subscriber line A and the outgoing trunk line 36 and the two-way distribution base station line a and the human trunk line 36 by means of a control circuit (not shown);ノ [One person line A1 distribution base station line a.

Although there are a plurality of trunk line connecting devices 33, one for each is shown for the sake of simplification of explanation. This operation will be explained below.

Activation from the distribution subscriber line A is detected by a control circuit 9 (not shown), and one of the plurality of output trunk lines 35 that is empty (ρ) is selectively connected to close the corresponding cross point. The activated relay connection device 33 activates the trunk line 34 and transmits the mobile station paging signal from the distribution subscriber line A to the trunk line 34. When there is a response from a mobile station (not shown), another control station (not shown) receives the response signal and returns a response activation signal to the trunk line 34, which is then sent to the two-way distribution subscriber line A. Closing the corresponding cross point. The holding may be done by the distribution subscriber line activation, the response activation, or both.The following operation will be explained using FIG.

Further, when the activation is from the trunk line 34, the relay connection device 33 detects that the activation is from another control station and activates the two-person trunk line 36. When a control circuit (not shown) detects activation from the input trunk line 36, it selects and connects one of the plurality of vacant distribution base station lines a and closes the corresponding cross point.

By closing the corresponding cross point, the distribution base station line a is activated, and a mobile station paging signal sent from another control station (not shown) via the trunk line 34 is sent to the distribution base station line a 7 from the base station (not shown). Send. When a response is received from a mobile station (not shown), a response signal is received by a base station (not shown), and a response activation signal is sent back to the distribution base station line a, so it is sent to the relay connection device 33 via a human relay line. The relay connection device 33&''i is activated in response to the relay line 34.

The corresponding crosspoint is maintained closed by human trunk line activation, response activation, or both, and may be V'-deviation. , after connecting the other lines that were used for discharge 11
Since only the line with the 3-4 response response remains, mutual communication is carried out between the mobile station that responded and the person who requested the connection.

When the call ends, the activation of the trunk line or the response activation of the distribution base station line a disappears, so the corresponding crosspoint is restored and the normal state returns.

FIG. 4 shows a relay exchange 9 constituting a part of a control station which is an embodiment of the present invention, and AA is a subscriber line connected to a subscriber (not shown) by a connecting device (not shown);
is a subscriber distribution device that combines an activation line from the subscriber line AA and a call line with a plurality of distribution subscriber terminals G'm distribution distribution board;
A is a distribution subscriber line from the subscriber distribution device, aa is a base station line connected to a base station (not shown) and a connection device f (not shown), 42 is a response activation line from the base station line aa, and a call line. A base station distribution device that distributes and couples to a plurality of distribution base station terminals and simultaneously sends out one piece of empty information to the plurality of distribution base station terminals, a is a distribution base station line from the base station distribution device, and 40 is a control circuit not shown. 41.43.44, 45.46 (d: 31.33.34°35, 36 in Fig. 3, respectively), which connects distribution subscriber line A and distribution base station line a by The same is true. In Fig. 4, the number of other control stations is two to simplify the explanation. Even if the number of control stations increases, the 41.43.44.45.
Just add 46.

Although there are a plurality of subscriber lines AA and base station lines aa, one for each is shown for the sake of brevity.

The details of the operation of the relay exchange are explained below using Figure 4.

explain.

When starting from subscriber line AA, a control circuit (not shown) of subscriber distribution equipment 47 simultaneously activates a plurality of distribution subscriber lines A, and base station line relay switching equipment 40. Activate multiple relay line bond exchange devices at the same time. The activated base station line switching device 40 selects a vacant distribution base station line a by an internal control circuit (not shown) and closes the corresponding cross point.

By closing the corresponding crosspoint, the base frequency distribution equipment @42 is activated via the distribution base station line a.

The activated base station distribution device 42 stops sending out idle information by an internal control circuit (not shown), activates the base station line aa, and sends out a mobile station paging signal from the subscriber line AA. In the old trunk line switching system, activation from the distribution subscriber line A selectively connects the empty trunk line to each control station as explained using FIG. 3, and receives the mobile station calling signal from the subscriber line AA. Make a relay connection.

Furthermore, activation from the trunk line 44 is performed by selectively connecting the vacant distribution base station line a and activating the base station distribution device 42, as explained using FIG. The activated base station distribution device 42 stops sending out air information by an internal control circuit (not shown) as described above, activates the base station line aa, and sends out a mobile station paging signal from the trunk line 44.

As explained above, mobile station paging signals are sent from all base stations, and mobile station paging is performed.

When the mobile station responds, it is received by a base station (not shown), and a response activation is returned from the base station line aa or trunk line 44. The response activation from the trunk line 44 is sent back to the distribution subscriber terminal A as explained in FIG. Send to central line a.

The base station line relay switching device 40 returns the response activation from the distribution base station line a to the subscriber distribution device 47 via the corresponding cross point.

- As explained above, the mobile station response signal is sent to the subscriber distribution device 4.
Be sure to receive it on 7.

When the subscriber distribution device 47 receives the response signal, an internal control circuit (not shown) causes the distribution subscriber line A that received the response to be
Activation of the other activated distribution subscriber lines is stopped.

As explained above, there remains a corresponding cross point between the subscriber line AA and only the base station line aa or trunk line 44 that responded, so the cross point between the subscriber line AA and the mobile station and the subscriber who has been successfully connected remains.
11 mutual calls are made.

As described above, according to the present invention, the relay switching circuits are distributed, the reliability of the relay connection is increased, and the installation of relay switching equipment for adding 711 stations of other systems is extremely simple.

In addition, since the control circuits and the like can each be made into rotary control circuits, faults can be found by performing replacement tests with other parts, making it extremely easy to find faults.

[Brief explanation of the drawing]

FIG. 1 is a control station layout diagram, and A to E are control stations. II is a subscriber, 12 is a mobile station, Figure 2 is a diagram of a conventional relay switching system, A is a subscriber line that is connected to a subscriber, and R, C, D, and E are connections to other system substations. line to
(median line), a is a base station line that is a line connected to the base station belonging to the control station, 21 is a relay exchange, two alphabetic characters are crosses connecting each of the above, j tint, Figure 3, FIG. 4 shows an embodiment of the present invention. In FIG. 3, A is a distribution subscriber line, a is a distribution base station line, 33 is a trunk line connection device, 34
31 is a trunk line relay connection device, 35 is an outgoing trunk line, 36 is an incoming trunk line, 47 in FIG. 4 is a subscriber distribution equipment, 4
2 is a base station distribution device, 40 is a base station relay switching device, old,
43.44.45,46 are 31°33.34 in Figure 3
．． 35. Same equipment as 36, same line as A, aid Figure 3.

Claims (1)

[Scope of Claims] Consisting of a plurality of control stations arranged on a line or in a line, the control stations are connected by a line (hereinafter referred to as a central line) that connects the control stations, and each control station In this case, there is a relay in a mobile communication system that performs intermediate vertical switching of mobile station calls by connecting the control station subscriber line and trunk line, between trunk lines, and between the subscriber line and intermediate line and the base station line belonging to the control station. In the exchange method,
A plurality of relay connection devices connected to trunk lines and provided with incoming and outgoing relay terminals, distribution subscriber terminals and outgoing relay terminals to be described later. A plurality of trunk line relay switching devices each connecting an incoming relay terminal and a distribution base station terminal (described later), and a subscriber line,
A subscriber line connection device with multiple distribution subscriber terminals, a base station line connection device that is connected to the base station line belonging to the control station and has multiple distribution base station terminals and outputs one blank information at the same time. 111 Relay switching in a mobile communication system consisting of a base station relay switching device that connects a user terminal and a distribution base station terminal, and characterized in that a plurality of relay switching devices independently relay and connect each other to output mobile stations. method.