KR100325387B1 - Signaling Message Routing Method In No.7 Signaling Network - Google Patents

Abstract

The present invention relates to a signaling message routing method in No.7 signaling network. In particular, the present invention relates to a signal path defined according to link selection data when routing a signaling message from each signaling point of the corresponding No.7 signaling network to an adjacent signaling point. The present invention relates to a signaling message routing method in No. 7 signaling network which enables routing of signaling messages according to a load sharing ratio for an available signaling path without routing.

When each signal point in the conventional No.7 signal network uses the routing according to the link selection data for each signal path in advance, even if there are a plurality of available signal paths for transmitting the signal traffic from the corresponding signal point to the adjacent signal point. Nevertheless, since the signal traffic is concentrated only on a specific signal path according to the link selection data, there is a problem that the utilization of the signal path transmitted from the No. 7 signal network to the final destination is significantly reduced.

According to the present invention, when there are a plurality of available signal paths at each signal point of No. 7 signal network, the present invention is adjacent by using path selection history corresponding to link selection data of a signal message and path selection data updated according to load sharing ratio. By performing message routing to signal points, it is possible to distribute signal traffic across all available signal paths, thereby improving the signal path utilization of the No. 7 signal network.

Description

No.7 Signaling Network in Signaling Message Routing Method

The present invention relates to a signaling message routing method in No.7 signaling network. In particular, the present invention relates to a signaling path defined according to link selection data when routing a signaling message from each signaling point of the corresponding No.7 signaling network to an adjacent signaling point. The present invention relates to a signaling message routing method in No. 7 signaling network which enables routing of signaling messages according to a load sharing ratio for an available signaling path without routing.

A schematic configuration of a conventional general No. 7 signal network is made as shown in FIG. 1. The signal path for message transmission in the corresponding No. 7 signal network is set as follows.

For example, if there is signal traffic from signal point A to signal point F of the corresponding No.7 signal network, and all signal links of each signal point are available, the shortest possible distance in normal state, that is, the number of signal points passing through The fewest signal paths are 'A → B → D → F', 'A → B → E → F', 'A → C → D → F' and 'A → C → E → F' There is.

In this case, a signal path via signaling link set 'BC' and 'DE' may be considered in the corresponding No.7 signal network, and when passing through the signal path, signal point A to signal point F are transmitted. Since the signal traffic is routed through four signal points, it is routed to the corresponding signal linksets 'BC' and 'DE' only when all signal paths with four signal points passing through are unavailable.

In addition, although various routing methods may be possible at each signal point, if each signal point has the same routing function, the final purpose of routing at each signal point is 50% of one or more available signal paths (typically two at a time). To distribute the signal traffic.

In other words, when signal traffic is transmitted at the shortest distance in No. 7 signal network, at signal point A, the signal path via 'AB' and 'AC' is fixed according to the link selection data (SLS; Signaling Link Selection) in the message. A link received from that signal point A, although it distributes the signal traffic at a rate, but at signal point B, which has the same routing function as that signal point A, even though there are signal paths available through 'BD' and 'BE' According to the selection data, signal traffic is delivered to a signal path via only one signal link set.

In the same way, the signal point C, although there is a signal path via the available 'CD' and 'CE', the signal via only one signal link set according to the link selection data received from the corresponding signal point A It will pass signal traffic along the path.

In this case, as shown in FIG. 2, the routing label of the corresponding signaling message includes 4 bits of link selection data (SLS), 14 bits of origin code and destination code.

On the other hand, there is one signal path available at each signal point (B, C; signal points D and E are excluded because only one signal path to signal point F exists) except signal point A of the corresponding No. 7 signal network. Signal traffic is processed through a signal path via only a specific signal link set even though there are more than two, and thus the utilization of the No. 7 signal network is significantly reduced.

For example, in a typical No.7 signal network, if the 4-bit link selection data is even at each signal point A, B, or C, the link selection data is routed to the signal path via the upper signal link set. If the odd number is assumed to be routed to the signal path through the lower signal link set, 16 bits of 4-bit link selection data can be represented in the corresponding No.7 signal network. Is set as shown in Table 1 below.

SLS value Signal path from A to F SLS value Signal path from A to F 0000 A → B → D → F 1000 A → B → D → F 0001 A → C → E → F 1001 A → C → E → F 0010 A → B → D → F 1010 A → B → D → F 0011 A → C → E → F 1011 A → C → E → F 0100 A → B → D → F 1100 A → B → D → F 0101 A → C → E → F 1101 A → C → E → F 0110 A → B → D → F 1110 A → B → D → F 0111 A → C → E → F 1111 A → C → E → F

That is, only signal paths 'A → B → D → F' and 'A → C → E → F' are actually used for routing the signal traffic in the corresponding No.7 signal network, and the remaining signal paths ('A → B') are used. → E → F 'and' A → C → D → F ') are not practically used, although they are available signal paths.

As described above, when each signal point in the conventional No.7 signal network uses predefined routing according to link selection data for each signal path, an available signal for transmitting signal traffic from the corresponding signal point to an adjacent signal point Although there are a plurality of paths, signal traffic is concentrated only on a specific signal path according to the link selection data. Thus, there is a problem in that the utilization of the signal path transmitted from the No. 7 signal network to the final destination is significantly reduced.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to provide a path selection history corresponding to link selection data of a signal message when a plurality of available signal paths exist at each signal point of No. 7 signal network. By routing the message to adjacent signal points using the path selection data updated according to the load sharing ratio, the signal path utilization of the corresponding No. 7 signal network can be distributed by distributing the signal traffic to all available signal paths. To improve.

1 is a diagram showing a schematic configuration of a general No. 7 signal network.

2 shows the structure of a routing label of a signaling message.

3 is a block diagram of a message transmitter level 3 for distributing signal traffic to an available signal path at each signal point of the No. 7 signal network according to the present invention;

4 is an operational flowchart for implementing a signaling message routing method in No. 7 signaling network according to the present invention;

Explanation of symbols on the main parts of the drawings

31: message distribution unit 32: message identification unit

33: message routing unit

A feature of the present invention for achieving the above object is a signal message routing method in a No.7 signaling network for transmitting a received signal message to a final destination, corresponding to link selection data of the signal message. Selecting an available predetermined signal path using path selection data updated according to the path selection history and the load sharing ratio; Routing the signal message to an adjacent signal point through a selected signal path; And updating the message routing count value and the path selection data for the signal path.

The path selection data may be a signal path identifier obtained by routing a signal message having link selection data of a predetermined destination, and the path selection history may include previously stored path selection data for link selection data of the signal message. In the case of link selection data that has been stored but never routed, an initial value '-1' is stored.

The step of selecting the available predetermined signal path may include: searching for a path selection history corresponding to link selection data of the signal message and confirming whether routing has been performed before; Selecting a signal path corresponding to the searched path selection history when the routing process has been performed, and selecting a signal path corresponding to the current path selection data when the routing process has not been performed; And updating the path selection history with path selection data corresponding to the selected signal path.

Further, the updating of the message routing count value and the path selection data may include: increasing the message routing count value of the routed signal path by '1'; Initializing the message routing count value when the increased message routing count value is increased to a predetermined threshold value; And updating the current path selection data. The predetermined threshold value is determined by the load sharing type for the available signal path, and after determining how many times the signal message is transmitted to the signal path corresponding to the current path selection data, it is determined whether to update the path selection data. It is characterized in that the threshold for.

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

The schematic configuration of the No. 7 signal network for explaining the signaling message routing method in the No. 7 signal network according to the present invention will be the same as the conventional configuration shown in FIG.

In addition, a configuration of a message transfer part (hereinafter, referred to as 'MTP') level 3 for distributing signal traffic to an available signal path at each signal point of the corresponding No. 7 signal network is shown in FIG. As shown in the figure, a message distribution unit (31; Message Distribution) for transmitting a signaling message to the user unit of the own station, and a message for analyzing and processing the message received from the MTP level 2 to determine whether the final destination of the message is the own station Part 32 (Message Discrimination) and a message routing unit (33; Message Routing) for routing to the signal path connected to the adjacent signal point for transmitting the message to the final destination, the No. 7 signal network according to the present invention The operation for implementing the signaling message routing method in is performed in the order as shown in FIG.

First, when a message is received from all signal points on the signal path at MTP level 2 (Signalling Terminal) of a predetermined signal point constituting No. 7 signal network, the message is transmitted to MTP level 3 (step S41). The message received by the identification unit 32 is analyzed to determine whether the final destination of the message is a local station (step S42).

If the final destination of the message is the own station, the message identification unit 32 transmits the message to the message distribution unit 31 (step S52), whereby the user receives the message received by the message distribution unit 31. After providing to the user through Level 4 (User Part; 'UP') (step S53), the user waits for receiving the next message.

However, if the final destination of the message in step S42 is not the own station, the message identification unit 32 transmits the received message to the message routing unit 33 (step S43), and thus, the message routing unit ( 33) selects a predetermined signal path according to the path selection history corresponding to the current path selection data updated according to the load sharing ratio and the link selection data of the signal message, and performs routing processing to the adjacent signal points. The route selection history corresponding to the link selection data of the message is searched (step S44) to confirm whether or not routing has been performed before (step S45).

Here, the corresponding path selection data is '0' when the signal message having link selection data of a predetermined destination is routed to a signal path identifier (for example, an upper signal point (signal path '0') above). ',' 1 'when routing to the lower signal point (signal path' 1 ').

The path selection history stores the path selection data ('0' or '1') previously stored for the link selection data of the signal message, but if the signal message having the link selection data is not routed at all, the path selection history is initially initialized. The value '-1' is stored.

On the other hand, when the routing process has been performed on the link selection data in step S45, that is, when the path selection history value corresponding to the link selection data is recorded as '0' or '1', the corresponding message routing unit 33 By routing to the corresponding signal path ('0' or '1') according to the searched path selection history ('0' or '1') (step S46), the sequence for the signal message for the same call processing ( To maintain the sequence).

However, if the routing selection has not been performed for the link selection data in step S45, that is, if the path selection history value corresponding to the link selection data is recorded as '-1', which is the initial value, the corresponding message routing unit 33 ) Is routed to the corresponding signal path according to the current route selection data (step S47), and the route selection history is updated with routed routed data (step S48).

Subsequently, the message routing unit 33 increases the message routing count value of the currently routed signal path by '1' for the next routing process of the received message (step S49), and then increases the message routing count value. It is checked whether it is equal to this predetermined threshold value (step S50).

Here, the predetermined threshold is a threshold determined by the load sharing type for the available signal path at the corresponding signal point. After the signal message is transmitted several times to the signal path corresponding to the current path selection data, the corresponding path selection is performed. A threshold for determining whether to update the data to perform load sharing on the available signal path.

At this time, if the corresponding message routing count value is not equal to the predetermined threshold, it waits for the next message to be received while maintaining the current path selection data, and if the corresponding message routing count value is equal to the predetermined threshold, that is, If the message routing value is increased to a predetermined threshold, the message routing count value is initialized and the current routing data is updated (step S51), thereby updating the routing data for the next received message. And routing according to the route selection history.

As described above, in the present invention, the message routing count value and the path selection data are updated whenever the message routing unit 33 of each signal point is transmitted to the adjacent signal point, thereby making the signal traffic transmitted to the adjacent signal point available. It can be distributed over the signal path and transmitted to the final destination.

For example, if there is signal traffic transferred from the signal point A to the signal point F of the No. 7 signal network shown in Fig. 1, the load on each signal path at the signal points B and C having a large number of available signal paths. Assuming the sharing ratio is as shown in Table 2 below, the case where the load sharing type for the corresponding signal path is '050_050' (load sharing by 50% for two available signal paths) is as follows.

Load sharing type Signal Path 0 (Up) Signal Path 1 (bottom) Threshold 100_000 100% 0% 0 090_010 90% 10% 2 080_020 80% 20% 4 070_030 70% 30% 6 060_040 60% 40% 8 050_050 50% 50% 10

In this case, the link selection data included in the message for the routing process for the signaling message transmitted from the signal point A to the signal point F is 16 kinds of '0000 to 1111 (0 to 15)', and the message according to the present invention. When the routing method is used, the load sharing state at each signal point is divided by 50% regardless of link selection data, as shown in Table 3 below.

Signal point A Signal points B, C Signal points D, E Signal point F 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 B: 0, 2, 4, 6, 8, 10, 12, 14 D: 0, 4, 8, 12 0, 2, 4, 6, 8, 10, 12, 14 E: 2, 6, 10, 14 C: 1, 3, 5, 7, 9, 11, 13, 15 D: 1, 5, 9, 13 1, 3, 5, 7, 9, 11, 13, 15 E: 3, 7, 11, 15

In addition, the embodiments according to the present invention are not limited to the above-described embodiments, and various alternatives, modifications, and changes can be made within the scope apparent to those skilled in the art.

As described above, according to the present invention, when there are a plurality of available signal paths at each signal point of No. 7 signal network, the path selection data is updated according to the path selection history corresponding to the link selection data of the signal message and the load sharing ratio. By performing the message routing to the adjacent signal points using, it is possible to distribute the signal traffic to all available signal paths, thereby improving the signal path utilization of the No. 7 signal network.

Claims (6)

In the signaling message routing method in No.7 signaling network for transmitting the received signaling message to the final destination, Selecting an available predetermined signal path using path selection history corresponding to link selection data of the signal message and path selection data updated according to a load sharing ratio; Routing the signal message to an adjacent signal point through a selected signal path; And updating the message routing count value and the path selection data for the signal path. The method of claim 1, And the path selection data is a signal path identifier obtained by routing a signal message having link selection data of a predetermined destination point. A signal message routing method in a seven signal network. The method of claim 1, The path selection history stores the path selection data previously stored for the link selection data of the signaling message, but stores the initial value '-1' in the case of the link selection data which has not been routed at all. Signaling message routing method in signaling network. The method of claim 1, The selecting of the available predetermined signal path may include: searching a path selection history corresponding to link selection data of the signal message to determine whether the routing has been performed before; Selecting a signal path corresponding to the searched path selection history when the routing process has been performed, and selecting a signal path corresponding to the current path selection data when the routing process has not been performed; And updating the path selection history with path selection data corresponding to the selected signal path. The method of claim 1, The updating of the message routing count value and the path selection data may include: increasing the message routing count value of the routed signal path by '1'; Initializing the message routing count value when the increased message routing count value is increased to a predetermined threshold value; And updating the current path selection data. A signaling message routing method in a seven signaling network. The method of claim 5, The predetermined threshold value is determined by a load sharing type for an available signal path, and a threshold for determining how many times the signal message is updated after transmitting a signal message to the signal path corresponding to the current path selection data. A number, characterized in that a value. A signaling message routing method in a seven signal network.