JP2001127891A - Signal repeating system having global title translating function, signal repeating method and recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten the time for restarting a signal link accommodation processor and to reduce the capacity of a memory to be used. SOLUTION: In an initial state, a caller side CSP1 requests a global translation to a data base processor 4, determines an outgoing side CSP2 on the basis of the acquired translated result and transfers the translated result and a received signal to the outgoing side CSP2. At such a time, the translated result and the outgoing side CSP are written in the first table. In an ordinary state, the outgoing side CSP is retrieved/predicted from the first table 1 and the received signal is transferred. In the initial state, the outgoing side CSP2 registers the translated result transferred from the incoming side CSP1 in the second table and sends the received signal to a signal link #4. In the ordinary state, the translated result is acquired from the second table on the basis of the received signal transferred from the incoming side CSP1, the outgoing side CSP is acquired on the basis of this translated result, and the received signal is sent to the signal link. When the prediction and acquisition of the CSP are different, the received signal is resent.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a signal relay with global title translation (hereinafter, referred to as "GT translation") in a multiprocessor switching system.

[0002]

2. Description of the Related Art A signal relay station (Signaling) realized in a conventional switching system having a multiprocessor configuration.
In a Transfer Point (STP), a signal link accommodating processor (Common channel Signaling) accommodating a common channel signal link.
In order to realize a flexible signal relay station configuration, each processor (CSP: Processor) does not have any special condition regarding the relationship with the signal link of a specific route.

[0003] Therefore, since the signal link accommodation processor (CSP) that receives the signal requesting the GT translation cannot be specified, all the signal link accommodation processors (CSP) constituting the signal relay station are required in that station. All GT translation data replicas are stored in the memory.

The conventional signal relay system having such a configuration operates as follows. That is, the signal received by the signal link accommodating processor (CSP) is transmitted to a signal transfer unit (Message Transfer Part: MT).
If P) is a signal that requires GT translation and is analyzed, a signal connection control unit (Signaling Connection C) that is a higher-level protocol of the signal transfer unit (MTP)
request GT translation from the control part (SCCP).

Since the GT translation data is stored in the all signal link accommodating processor (CSP) as described above, the signal connection control unit (SCCP) outputs the GT translation result in the processor and performs signal transfer. Section (MTP). The signal transfer unit (MTP) includes a signal connection control unit (SC
From the GT translation result received from the CP), a signal relay destination (destination point code) is specified, a signal is routed, a signal link on a route to the relay destination is determined, and the signal link is accommodated. The received signal is transferred in the system to the signal link accommodating processor (CSP).

[0006]

However, the first conventional signal relay system having a GT translation function as described above.
The problem is that the signal link accommodating processor (hereinafter, "CS
P ”) increases the resumption time of the process. The reason is that the GT translation data is loaded from the database at the time of resumption in order to accommodate all GT translation data in all CSPs.

A second problem is that all GTs contain all GT translation data, which causes memory shortage.

[0008] An object of the present invention is to provide a GT accommodated in each CSP.
An object of the present invention is to provide a signal relay system and a signal relay method capable of reducing the amount of translation data and shortening the restart time of CSP processing.

Another object of the present invention is to provide a signal relay system and a signal relay method capable of reducing the amount of GT translation data accommodated in each CSP and eliminating the shortage of CSP memory.

[0010]

According to a first aspect of the present invention, there is provided a signal relay system, comprising: a receiving unit that receives a signal including a global title translation request; In the signal relay system for transferring the received signal to the side signal link accommodating processor, global title translation data necessary for the global title translation is distributed from the database to the signal link accommodating processor according to the operation of the signal relay system from the initial state. In the stationary state, the global title translation is performed using the distributed global title translation data.

A signal relay system according to a second aspect of the present invention is configured such that a signal including a global title translation request is received from an ingress signal link accommodating processor to a egress signal link accommodating processor in which the result of the global translation is involved in the specification. In the signal relay system for transferring the reception signal, each of the signal link accommodation processors uses the destination address and the signal link selection signal included in the reception signal as input keys to search and predict the outgoing signal link accommodation processor. A first table, a global translation result obtained from a database in an initial state is registered with the destination address as a key, and in a steady state, a second table for obtaining a global translation result by the destination address, The destination point code extracted from the translation result and the A third table for determining an outgoing signaling link accommodating processor according to a signaling link selection signal included in the signaling signal, wherein the ingress signaling link accommodating processor requests global translation from the database in an initial state. Determining the outgoing signal link accommodating processor by the third table based on the acquired translation result, transferring the translated result and the received signal to the outgoing signal link accommodating processor, and in a steady state, from the first table. The outgoing signal link accommodating processor searches and predicts the outgoing signal link accommodating processor and transfers the received signal.In the initial state, the outgoing signal link accommodating processor reads the translation result transferred from the ingress signal link accommodating processor in the first state. 2 and sends the received signal to the signal link, and in the steady state, A translation result is obtained from the second table based on the received signal transferred from the lock accommodation processor, and an outgoing signal link accommodation processor is acquired using the third table based on the translation result. The received signal is transmitted to the acquired signal link corresponding to the output side signal link accommodating processor.

A signal relay method according to a first aspect of the present invention is characterized in that a signal containing a global title translation request is received from an ingress signal link accommodating processor to an egress signal link accommodating processor in which the result of the global translation is involved in its specification. In the signal relay method for transferring the received signal, global title translation data required for the global title translation is distributed from the database to the signal link accommodating processor from a database according to the operation of the signal relay station system from an initial state. In the state, the global title translation is performed using the distributed global title translation data.

According to a second signal relaying method of the present invention, a signal containing a global title translation request is received from an ingress signal link accommodating processor to a egress signal link accommodating processor in which the result of the global translation is involved in its specification. In the signal relaying method for transferring the signal, the signal link accommodating processor uses the destination address and the signal link selection signal included in the received signal as input keys to search and predict the outgoing signal link accommodating processor. A first table, a second table for registering a global translation result obtained from a database in an initial state using the destination address as a key, and obtaining a global translation result based on the destination address in a steady state; The destination point code extracted from the result and the received signal A third table for determining the outgoing signaling link accommodating processor according to the signaling link selection signal to be received, and the ingress signaling link accommodating processor, in an initial state, requesting the database for global translation. Determining the outgoing signal link accommodating processor from the third table based on the acquired translation result, and transferring the translation result and the received signal to the outgoing signal link accommodating processor. Then, there is a step of searching for and predicting an outgoing signal link accommodating processor from the first table and transferring the received signal. The outgoing signal link accommodating processor, in an initial state, receives the incoming signal link accommodating processor. Registering the translation result transferred from the processor in the second table; and transmitting the received signal to a signal link. Transmitting a translation result from the second table based on the received signal transferred from the incoming signal link accommodating processor in a steady state, and based on the translation result. The method includes a step of acquiring the outgoing signal link accommodating processor using the third table, and a step of transmitting the received signal to the acquired signal link corresponding to the outgoing signal link accommodating processor.

In the present invention, a signal connection control unit (hereinafter referred to as "S
GT translation and signal transfer unit (hereinafter referred to as "CCP").
Signal routing by "MTP")
A CSP that receives a signal from a signal link (hereinafter referred to as “input side C
SP "), all translation results had to be deployed in the ingress CSP, whereas G
T translation and MTP routing to C
SP (hereinafter referred to as “outgoing CSP”), the signal connection control unit address information of the received signal, which is an input key for GT translation, and the signal link selection signal (Signal)
In addition, since the global title translation data is deployed only to the outgoing CSP predicted from ing Link Selection (SLS), the CSP restart time can be reduced and the memory usage can be reduced.

[0015]

Next, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows the configuration of a general signal relay system having a GT translation function, and the arrow of the signal relay path in the initial state of the signal relay system of the present invention. In this signal relay system, three CSPs
1, CSP2 and CSP3, and a database processor 4 are connected to an inter-processor communication device (HUB) 5.

CSP1 accommodates signal link # 1 and signal link # 2 for transmitting and receiving signals, and CSP2 includes signal link # 3 and signal link # 4 for transmitting and receiving signals.
, And the CSP 3 accommodates a signal link # 5 and a signal link # 6 for transmitting and receiving signals. Each of these CSP1, CSP2 and CSP3 is the M
TP and SCCP (both are not shown). The database processor 4 includes CSP1, CSP2
And a database in which GT translation data used by the CSP 3 is stored in advance.

FIG. 5 shows an outline of a format of a received signal received by the incoming CSP. The input key for GT translation is SCCP destination address information (hereinafter, referred to as “destination address”), and the input key for MTP routing described later is a destination point code (Destina).
a point point code (DPC) and a signal link selection signal (SLS).

In FIG. 1, in the initial state, the incoming CSP
When CSP1 receives a signal requesting GT translation, it cannot predict the outgoing CSP (CSP2) in this state, so CSP1 requests GT translation from the database processor 4 and performs GT translation. Get the result. CSP1 is based on the GT translation result,
Performing MTP routing using the table and the outgoing CS
P is determined, and a destination address and a signal link selection signal (SL) included in the received signal are stored in a built-in first table.
After writing the relationship between S) and the outgoing CSP, the GT translation result and the received signal are transferred to the outgoing CSP 2 in the system. C
SP2 writes the relation between the received GT translation data and the destination address in the second table, and sends the received signal to signal link # 4.

By repeating such processing, the above-mentioned first table built in the incoming CSP is enhanced, and the incoming CSP predicts the outgoing CSP by searching this first table. You can do it. In such a steady state, when the incoming CSP receives the received signal including the destination address and the signal link selection signal (SLS), it immediately transfers the received signal to the outgoing CSP, and
The SP can perform GT translation and MTP routing using the third table. Although the probability that the result of MTP routing is the same CSP is not 100%, GT translation data in the database is distributed and accommodated in each CSP of the system while repeating signal relay. Figure 2 shows a signal relay image in this state.
Shown in In FIG. 2, the arrow from the CSP 1 to the database processor 4 is not shown and does not require GT translation.

Before explaining the detailed operation using the flowchart, the first table (FIG. 6) and the second
Table (FIG. 7) and third table (FIGS. 8 to 10)
Is mentioned.

FIG. 6 shows that the outgoing CSP determined based on the translation result obtained from the database processor 4 in the initial state is written using the destination address and the signal link selection number (SLS) as keys. 9 shows a first table for acquiring a side CSP number. This first table is used by the incoming CSP. FIG. 7 shows a second table for registering the GT translation result transferred from the incoming CSP in the initial state using the destination address as a key and obtaining the GT translation result from the destination address in the steady state. This table is used by the egress CSP.

FIGS. 8, 9 and 10 show a third table composed of three tables used in MTP routing using a destination point code (DPC) as an input key. This table is used by the ingress CSP and the egress CSP. That is, FIG. 8 shows the arrival point code (DP
C) a table for acquiring a signal route group (lgn) from the signal route group, FIG. 9 is a table for acquiring a signal link (slk) from the signal route group (lgn), and FIG.
0 is a table for acquiring the egress CSP from the signal link (slk). In the MTP routing, these three tables are sequentially traced using a destination point code (hereinafter referred to as “DPC”) as an input key (Sign).
alling Link Selection: SL
S). Finally, the outgoing CSP number is obtained.

Each of the tables in FIGS. 8, 9 and 10
All data is implemented immediately after the restart of the CSP. On the other hand, in the tables of FIG. 6 and FIG. 7, data is gradually added after restarting while repeating the signal relay processing.

FIG. 3 is a flowchart showing the operation of the incoming CSP, and FIG. 4 is a flowchart showing the operation of the outgoing CSP. Hereinafter, CSP1 is the incoming CSP and CSP2 is the outgoing C
Description will be made as SP.

First, when a signal is received by the CSP 1 in the initial state (step S1 in FIG. 3), the MT of the CSP 1
P attempts to predict the outgoing CSP from the information that the DPC in the received signal is its own station and that the GT is translated, using the destination table and SLS in the received signal as keys, using the first table in FIG. (Step S2) At this time, since data is not mounted in the first table, the outgoing CSP cannot be searched (Step S3).
A GT translation is requested from the database processor 5 for the T translation, and a translation result is obtained (step S4).

The MTP of CSP1 performs MTP routing using the DPC included in the translation result and the SLS in the received signal using the third table in FIGS. 8, 9 and 10, and determines the outgoing CSP2. (Step S5),
G to the outgoing CSP 2 via the inter-processor communication device 5
The T translation result and the received signal are transferred (step S6).

The egress CSP 2 transmits the signal transferred from the ingress CSP 1 including the translation result and not only the received signal (step S 11 in FIG. 4), so that the second table (GT translation) shown in FIG. Table), and transfer the received signal to the signal link # 4 (step S1).
2).

After repeating the above signal transfer, the GT translation data in the database processor 4 becomes C
SPs 1, 2 and 3 are distributed and accommodated.

Under such a steady state, CSP1
Receives the received signal from the signal link # 2 (step S1 in FIG. 3), the terminal searches the outgoing CSP2 from the destination address and the SLS in the received signal. In this case, since the search can be performed (step S3), the output CSP is predicted from the search and the received signal is transferred in the system (step S7).

In CSP2, the signal transferred from CSP1 is only the received signal (step S1 in FIG. 4).
1) Since the DPC is its own station (step S1)
3) As described above, GT translation is performed based on the accumulated data, DPC is extracted, MTP routing is performed, and the outgoing CSP is determined (step S1).
4).

However, if the outgoing side CPS 2 predicted in step S2 in FIG. 3 is different from the CSP determined by the MTP routing in step S14 in FIG. 4 (hereinafter referred to as CSP3), the received signal is further transmitted to the CSP3. Transfer (step S15).

In CSP3, the signal transferred from CSP2 is only the received signal (step S11), and the DPC is not its own station (step S13), and the GT translation and MTP routing have already been completed. (Step S14 in CSP2), a received signal is transmitted to signal link # 6, and the process is terminated (Step S14).
17).

As described above, when the predicted CSP and the CSP determined by the MTP routing are different, some signal delay occurs, but there is almost no influence on the processing capability of each CSP, and Considering that the probability that the CSP is incorrectly predicted is considerably low in the steady state, the effect of reducing the memory and shortening the restart time by the data distribution is great. If the prediction of the CSP is correct in step S15, a signal is transmitted to the signal link # 4, and the process ends (step S16).

A program for causing a computer to execute the above-described signal relay method may be recorded on a computer-readable recording medium such as a semiconductor memory or a magnetic disk, and read and executed by the computer. Such a program controls the computer and exerts the same functions as those in the flowcharts shown in FIGS.

[0036]

The first effect of the present invention is that the GT translation data is distributed and accommodated in the CSP, so that it is not necessary to acquire the GT translation data from the database processor in a steady state, so that the restart time of the CSP is reduced. It is possible to do.

The second effect is that the translation data is converted to CSP
Since all the CSPs need not accommodate all the GT translation data, the memory can be reduced.

[Brief description of the drawings]

FIG. 1 is a diagram showing a signal relay image in an initial state of a signal relay system of the present invention.

FIG. 2 is a diagram showing a signal relay image in a steady state of the signal relay system of the present invention.

FIG. 3 is a processing flowchart of an incoming signal link accommodating processor (incoming CSP) according to the present invention.

FIG. 4 is a processing flowchart of an egress signal link accommodating processor (egress CSP) according to the present invention.

FIG. 5 is a diagram showing a format of a common line signal to be subjected to GT translation.

FIG. 6 shows a destination address and a signal link selection signal (SL).
S) with the egress signal link accommodation processor (egress CS
The figure which shows the 1st table for acquiring P).

FIG. 7 is a view showing a second table for extracting a GT translation result from a destination address.

FIG. 8 is a diagram showing a table constituting a third table for extracting a signal link group from a destination point code (DPC).

FIG. 9 is a diagram showing a table constituting a third table for extracting a signaling link from a signaling link group and a signaling link selection number (SLS).

FIG. 10 is a diagram showing a table constituting a third table for extracting an outgoing signal link accommodating processor (CSP) from a signal link.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Signal-link accommodation processor (CSP) 2 Signal-link accommodation processor (CSP) 3 Signal-link accommodation processor (CSP) 4 Database processor 5 Inter-processor communication device (HUB)

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5K026 AA02 AA21 BB02 CC03 CC07 EE07 EE10 FF02 FF03 FF26 FF27 HH06 LL07 5K051 AA03 BB02 EE01 EE02 HH05 HH15 KK05

Claims (7)

[Claims] 1. A signal relay system for transferring a received signal from an incoming signal link accommodating processor that has received a signal including a global title translation request to an outgoing signal link accommodating processor that is involved in the specification of the result of the global translation. The global title translation data necessary for the global title translation is distributed and arranged in the signal link accommodating processor from the database according to the operation of the signal relay system from the initial state, and in the steady state, the distributed global title translation is distributed. A signal relay system for performing the global title translation using data. 2. A signal relay system for transferring a received signal from an ingress signal link accommodating processor which receives a signal including a global title translation request to an egress signal link accommodating processor in which a result of the global translation is involved in its specification. In each of the signal link accommodation processors, a first table for searching and predicting an outgoing signal link accommodation processor using a destination address and a signal link selection signal included in the received signal as input keys, A global translation result obtained from a database is registered with the destination address as a key, and in a steady state, a second table for obtaining a global translation result by the destination address, a destination point code extracted from the translation result, Signal link selection included in the received signal A third table for determining an outgoing signal link accommodating processor according to a signal, wherein the incoming signal link accommodating processor requests a global translation from the database in an initial state, and based on the acquired translation result, The outgoing signal link accommodating processor is determined by the third table, and the translation result and the received signal are transferred to the outgoing signal link accommodating processor. In a steady state, the outgoing signal link accommodating processor is searched from the first table. The predictor transfers the received signal, and the egress signal link accommodating processor registers the translation result transferred from the ingress signal link accommodating processor in the second table in the initial state, and performs signal linking. The received signal is transmitted to the ingress signal link accommodating processor in a steady state. Acquiring a translation result from the second table based on the received reception signal, acquiring an outgoing signal link accommodating processor using the third table based on the translated result, and acquiring the acquired outgoing signal link. A signal relay system for transmitting the received signal to a signal link corresponding to an accommodation processor. 3. If the outgoing signal link accommodating processor obtained by the outgoing signal link accommodating processor is different from the one retrieved and predicted by the ingress signal link accommodating processor, the acquired outgoing signal link accommodating processor. 3. The signal relay system according to claim 2, wherein the received signal is retransmitted to an accommodation processor, and the signal link accommodation processor that has received the retransmission transmits the received signal to a connected signal link. 4. A signal relay method for transferring a received signal from an ingress signal link accommodating processor which has received a signal including a global title translation request to an egress signal link accommodating processor in which the result of the global translation is involved in its specification. The global title translation data required for the global title translation is distributed to the signal link accommodating processor from a database according to the operation of the signal relay station system from the initial state, and in the steady state, the distributed global data is distributed. A signal relay method, wherein the global title translation is performed using title translation data. 5. A signal relay method for transferring said signal from an ingress signal link accommodating processor which has received a signal including a global title translation request to an egress signal link accommodating processor in which the result of said global translation is involved in its specification. In the signal link accommodating processor, a first table for searching and estimating an outgoing signal link accommodating processor using a destination address and a signal link selection signal included in the received signal as input keys, A global translation result obtained from a database is registered with the destination address as a key, and in a steady state, a second table for obtaining a global translation result by the destination address, a destination point code extracted from the translation result, and Signal link selection signal included in received signal A third table for determining a more outgoing signal link accommodating processor; a procedure for requesting a global translation from the database in an initial state; A step of determining the outgoing signal link accommodating processor based on the third table, and a step of transferring the translation result and the received signal to the outgoing signal link accommodating processor. And transmitting the received signal by searching and predicting the outgoing signal link accommodating processor, and the egress signal link accommodating processor has been transferred from the incoming signal link accommodating processor in an initial state. A step of registering a translation result in the second table, and a step of transmitting the received signal to a signal link. In the steady state, a procedure for acquiring a translation result from the second table based on the received signal transferred from the incoming signal link accommodation processor, and using the third table based on the translation result A signal relay method comprising: a step of acquiring an outgoing signal link accommodating processor; and a step of transmitting the received signal to a signal link corresponding to the acquired outgoing signal link accommodating processor. 6. When the outgoing signal link accommodating processor obtained by the outgoing signal link accommodating processor is different from the one searched and predicted by the ingress signal link accommodating processor, the acquired outgoing signal link accommodating processor. 6. The method according to claim 5, further comprising: a step of retransmitting the received signal to an accommodation processor; and a step of transmitting the received signal to a connected signal link when the signal link accommodation processor receives the retransmission. Signal relay method. 7. A signal relay method for transferring a received signal from an ingress signal link accommodating processor which has received a signal including a global title translation request to an egress signal link accommodating processor which is involved in specifying the result of the global translation. A first table for searching and estimating an outgoing signal link accommodating processor using a destination address and a signal link selection signal included in the received signal as input keys, and an initial state At the time, a global translation result obtained from a database is registered with the destination address as a key, and in a steady state, a second table for obtaining a global translation result by the destination address, and a destination point code extracted from the translation result And a signal link selection signal included in the received signal And a third table for determining an outgoing signal link accommodation processor, wherein the ingress signal link accommodation processor, in an initial state, requests a global translation from the database, Determining the outgoing signal link accommodating processor based on the third table, and transferring the translation result and the received signal to the outgoing signal link accommodating processor. A step of searching and predicting an outgoing signal link accommodating processor from a table and transferring the received signal, wherein the outgoing signal link accommodating processor is transferred from the incoming signal link accommodating processor in an initial state. Registering the translated result in the second table, and transmitting the received signal to a signal link. In the steady state, a procedure for acquiring a translation result from the second table based on the received signal transferred from the incoming signal link accommodation processor, and acquiring an outgoing signal link accommodation processor based on the translation result And transmitting the received signal to a signal link. A computer-readable recording medium storing a program for causing a computer to execute a signal relay method.