JPH0563836A - Signal transfer processing system - Google Patents

Abstract

PURPOSE:To keep the capacity of a transfer capability of a signal network by eliminating a signal representing a loop state from a signal network of the common line signal system. CONSTITUTION:A test management function section 2 in a signal transfer section at a signal transfer point at which a signal is sent/received sends a loop test signal via a signal transmission section 1 and registers the signal to an identification table 3. The test management function section 2 receives the signal again via other signal transfer point via a signal distribution section 4, identifies the signal is in looping in a signal network and reports a transmission destination signal point address and a reception route in the loop state to a transfer restriction control section 5. The transfer restriction control section 5 sends the reported transfer restriction signal relating to the transmission destination signal point to the reception route.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to common line signaling,
In particular, it relates to a signal transfer processing method of an electronic exchange device.

[0002]

2. Description of the Related Art In a conventional signal transfer processing system, when a signal loop occurs in a common line signaling system, it is impossible to avoid this loop state.

A description will be given below with reference to the drawings.

In a common-line signaling system as shown in FIG. 2, signal transfer points A, B, C, and D, if the received signal is not a signal for the own signal point, send the signal to a transfer route that can be transferred. Forward. The determination as to whether or not the received signal is for the own signal point is performed by comparing the destination signal point address of the signal shown in FIG. 3 with the own signal point address.
If they are the same, it is determined that the signal is for the own signal point, and if they are different, it is determined that the signal is not for the own signal point, and the signal is transferred to a route that can be transferred to the destination signal point of the signal. Further, the signal points X and Y are signal points having no transfer function, and if the received signal is not the signal for the own signal point, the signal is discarded.

For example, in a common line signaling system as shown in FIG. 2, when a signal point X sends a signal for a signal point Y to a route X-A in a state where all routes can be transferred, the signal is At the signal transfer point A that has received the signal, the destination signal point address Y in the signal is compared with the own signal point address A, and the signal transfer point A is different. Therefore, the signal is transferred to the route AC that can be transferred to the destination signal point Y. Similarly, the signal transfer point C that has received the signal transfers the signal to the route CY. Since the destination signal address in the received signal and the own signal point address of the signal point Y are the same, the signal point Y is determined to be a signal for the own signal point and the signal is processed as the own signal point incoming.

With respect to the signal point Y, routes A-C and A-D cannot be transferred from the signal transfer point A, routes B-C cannot be transferred from the signal transfer point B, When the routes C-D and the route D-Y cannot be transferred when viewed from the signal transfer point D, it is assumed that the signal from the signal point X to the signal point Y is sent to the route X-A. Signal transfer point A transfers the signal to route AB, signal transfer point B transfers the signal to route BD, and signal transfer point D transfers the signal to rate AD. In this way, the signal for the signal point Y enters the loop of the signal transfer points A → B → D → A and cannot be transferred to the signal point Y.

[0007]

As described above, in the conventional signal transfer processing system, when a specific state in which usable lines are limited due to a line failure or the like is brought into a specific state, a signal loop state is caused and a target signal is generated. It may not be possible to transfer the signal to the point.

In addition, the fact that the signal network of the common line signaling system has a signal that is in such a loop state reduces the signal transfer capacity of the signal network, which also deteriorates the serviceability of the entire network. Connect

[0009]

According to the signal transfer processing method of the present invention, in the signal transfer processing method of the common line signal method, the test management function section in the signal transfer section at the signal transfer point for transmitting and receiving signals is a loop test signal. And registering in the identification table and receiving this signal again via another signal transfer point, it is identified that the signal is looped in the signal network using the common line signaling system, A configuration in which the destination signal point address in the loop state and the receiving route are reported to the transfer regulation control unit of the transfer unit, and the transfer regulation control unit transmits the transfer regulation signal related to the reported destination signal point to the reception route. Is.

[0010]

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

FIG. 1 is a block diagram for explaining an embodiment of a signal loop regulation process at each signal transfer point of the present invention. The signal transfer section sends a loop test signal, receives the signal again, and receives the signal again. Test management function unit 2 for identifying loops
A signal transmitting section 1 for transferring the loop test signal in the same manner as a general signal, a signal distributing section 4 for transmitting the loop test signal reception to the test management function section 2, and an identification for registering information of the loop test signal. A table 3 and a transfer regulation control unit 5 that executes a transfer regulation process are provided.

FIG. 2 is a diagram showing a configuration example of a signal network of the common line signaling system. Here, with respect to the signal point Y, the signal transfer point A
The route A-C and route A-D cannot be transferred, the route B-C cannot be transferred from the signal transfer point B, and the route CD and route can be viewed from the signal transfer point D. D-
When Y cannot be transferred, it is assumed that the signal from the signal point X to the signal point Y is sent to the route X-A. Signal transfer point A transfers the signal to route AB, signal transfer point B transfers the signal to route BD, and signal transfer point D transfers the signal to route AD. In such a state, the signal for the signal point Y is the signal transfer point A → B → D → A.
Enters the loop state.

In order to regulate such loop transfer, signal loop regulation processing is executed in the following procedure. First, the test management function unit 2 at the signal transfer point A creates a loop test signal, requests the signal transmission unit 1 at the signal transfer point A to send a signal, and registers the information of the test signal in the identification table 3. The structure of the loop test signal is shown in FIG. The service type code is a test signal, the destination signal point address is a signal point Y, the source signal point address is a signal point X, the signal type code is a loop test signal, and the signal source point address is a signal transfer point A. A test pattern code is free. Set to.

The signal transmission unit 1 at the signal transfer point A routes the loop test signal for which a transmission request is made according to the signal destination signal point address information (signal point Y) of the signal in the same manner as a general signal.
-Send to B.

The signal distribution unit 4 at the signal transfer point B transmits the received loop test signal to the test management function unit 2 according to the service type code and the signal type code information included in the signal.

The test management function unit 2 at the signal transfer point B compares the loop test signal reported from the signal distribution unit 4 with the type table 3, and since this loop test signal is not registered, the identification table After registering in 3, the transfer request is issued to the signal transmitting unit 1.

The signal transmitting unit 1 at the signal transfer point B routes the loop test signal requested to be transmitted according to the signal destination address information (signal point Y) of the signal as in the case of a general signal.
-Send to D.

At the signal transfer point D, the loop test signal received in the same procedure as that processed at the signal transfer point B is registered in the identification table 3 and the loop test signal is routed to the route A.
-Transfer to D.

The signal distribution unit 4 at the signal transfer point A transmits the received loop test signal to the test management function unit 2 according to the service type code and signal type code information included in the signal.

The test management function unit 2 at the signal transfer point A compares the loop test signal received from the signal distribution unit 4 with the identification table 3 and, since the signal has already been registered, the signal falls into a loop state. It is determined that there is a loop test signal, and the transfer restriction control unit 5 determines the destination signal point address of the loop test signal and the reception route information.
Report to.

The signal regulation control unit 5 at the signal transfer point A returns a regulation signal to the reception route for the destination signal point reported from the test management function unit 2.

The information registered in the identification table of each signal transfer point is deleted at an appropriate time interval.

When the test management function unit 2 for the signal point X receives the loop test signal, the signal is discarded because the destination signal point and the own signal point are the same.

At the signal transfer point D that has received the restriction signal, the transfer to the signal point Y is restricted and the existing transfer restriction procedure is executed to restrict the signal loop state.

[0025]

As described above, the present invention detects a loop state of a signal by using a loop test signal in a signal network of a common line signaling system and executes transfer restriction processing, so that the loop state is detected from within the signal network. It is possible to remove the signal that has fallen into the network, and it is possible to maintain the capacity of the transfer capacity of the signal network.

[Brief description of drawings]

FIG. 1 is a block diagram for explaining an example of a signal loop regulation process at each signal transfer point according to the present invention.

FIG. 2 is a diagram illustrating a configuration example of a common line signaling system.

FIG. 3 is a configuration diagram of a loop regulation signal used for signal loop regulation processing.

[Explanation of symbols]

 1 Signal Transmission Unit 2 Test Management Function Unit 3 Identification Table 4 Signal Distribution Unit 5 Transfer Regulation Control Unit A to D Signal Transfer Point X, Y Signal Point

Claims (1)

[Claims] 1. In a signal transfer processing method of a common line signal method, a test management function section in a signal transfer section at a signal transfer point for transmitting and receiving a signal sends a loop test signal and registers it in an identification table, and other signals. By receiving this signal again via the transfer point, it is identified that the signal is looped in the signal network using the common line signaling system, and the signal is sent to the transfer regulation control unit of the signal transfer unit in the loop state. A signal transfer processing method characterized in that a destination signal point address and a reception route are reported, and the transfer regulation control unit sends a transfer regulation signal relating to the reported destination signal point to the reception route.