KR20040045081A - Load Shraring Method of Signaling No.7 Messages - Google Patents

Abstract

PURPOSE: A load sharing method in a common channel signaling system is provided to evenly share load by referring to supplementary information as well as SLS(Signaling Link Selection) information of a signal message in routing the signal message. CONSTITUTION: Compared to a case that the same routing path is made for each signaling pint code, various routing paths can be made by shifting routing information of each SLS according to lower 4-bit information of signal unit number, and accordingly, load of signal message traffic routed to a corresponding area can be shared. Besides the SLS used for sharing the load among signaling points having the same routing information, the load of the signal message traffic can be shared by using new supplementary information. The new supplementary information include a portion of the signal unit number, ID information on signal route for transmitting a signal message, a set ID of a signaling link for transmitting signal traffic, a portion of a host signaling point and an OPC(Origination Point Code) of the signal message.

Description

Load sharing method of Signaling No.7 in common line signaling

According to the present invention, when routing a signaling message in a common network signaling network (No. 7) signaling network, an appropriate signaling traffic is distributed to each signal link (Load / Share). The present invention relates to a load sharing method in a common line signaling method, and more particularly, to compensate for a phenomenon in which signal traffic is concentrated on a specific signal link or signal traffic is not transmitted on a specific signal link. In order to efficiently handle the limited signal network resources by distributing the signal message evenly through the signal links in various paths when processing the signal message, the load sharing method and the program for realizing the method. The present invention relates to a computer-readable recording medium having recorded thereon.

In general, the "No. 7" signaling method, which is a common line signaling method standardized by the International Telecommunication Standardization Division (ITU-T) of the International Telecommunication Union, is used to provide call connection between subscribers and various communication services or to manage and operate a communication network. As a signaling method for transmitting various control signals, existing public switched telephone networks (hereinafter referred to as "PSTNs"), mobile networks of mobile carriers, and interconnection networks between communication service providers. (Gateway Network), or as the interconnection protocol to the next generation communication network (NGN).

With the development of communication services and the emergence of various communication providers, the existing communication network requires a standard protocol (interworking protocol) that guarantees interworking between service platforms capable of supporting various services and various exchange systems between service providers. The No.7 protocol, which has become the standard, is used as a transport protocol between switching systems of a public switched telephone network (PSTN), an interconnection switching network between service providers, and an interworking protocol between mobile communication switching systems. The interworking protocol with this next generation network (NGN) will also be considered as the No.7 protocol.

In increasingly complex and diversified No.7 signaling networks, the efficient operation of limited resources is of paramount importance. Particularly, in case of links connecting two regions, all signal traffic between regions is concentrated, so even though the signaling message traffic is relatively high, No.7 protocol restriction that cannot consist of more than 16 signal links between two signaling points Therefore, increasing the efficiency of these network resources can be a way to increase the stability and availability of No.7 signaling network.

1 is a diagram illustrating an embodiment of a routing label of a general No. 7 signal message.

In the figure, "101" denotes an incoming signal point code (Destination Point Code hereinafter "DPC"), "102" denotes an origination point code code (hereinafter referred to as "OPC"), "103" Denotes a Signaling Link Selection Code (hereinafter referred to as "SLS"), and "104" denotes data DATA, respectively.

The routing label is composed of a 14-bit DPC 101, a 14-bit OPC 102, a 4-bit SLS 103, and an N-bit data 104. It contains address information for transferring from the to the destination signaling point. In addition, the SLS 103 is used for signal traffic load sharing. In other words, the DPC 101 information in the routing label of the signaling message is used for routing the signaling message, and in order to load / share the signaling message with a plurality of signal routes, SLS 103 information from 0 "to" 15 "is used.

According to No. 7 protocol, signaling messages having the same SLS 103 information should be delivered through the same signaling route.

2A and 2B are structural examples of a general No. 7 signal network, and show an example of a load sharing structure of a signal message.

In the figure, "210" is a signaling message origin point (hereinafter referred to as "SP a"), "221-224" is a signaling point (hereinafter referred to as "STP A to STP D"), and "231 to 234" Indicates a signal message destination point (hereinafter referred to as "SP b to SP e").

Assuming a signal network as shown in FIG. 2A, first, a path through which signal traffic from SP a 210 to SP b 231 can be transmitted is described as follows: "SP a 210-> STP A 221->. STP C (223)-> SP b (231) "," SP a (210)-> STP A (221)-> STP D (224)-> SP b (231) "," SP a (210)- > STP B (222)-> STP C (223)-> SP b (231) ", or" SP a (210)-> STP B (222)-> STP D (224)-> SP b (231) There may be four cases of ". However, the signal traffic in No.7 protocol protocol should be delivered on the same path and the same signal link for each signaling link selection (hereinafter referred to as "SLS") of the signaling message. Therefore, in order to satisfy the protocol of No. 7 protocol, four non-overlapping SLSs can be allocated to each path. In other words, STP A 221 and STP B 222 at SP a 210 and STP C 223 and STP D 224 at STP A 221 to transmit a signaling message to SP b 231, respectively. In STP B 222, STP C 223 and STP D 224. In STP B 222, SP b 231 is directly connected. In STP D 224, SP b 231 is directly connected. Each SLS can be allocated by constructing a signal route.

To assign SLS to two signal routes, several regular methods are used, such as distributing odd SLS and even SLS, or distributing small numbers (0-7: LOW SLS) and high numbers (8-15: HIGH SLS). Can be.

A signal link set between each signal point may consist of a maximum of 16 signal links, and each signal link is assigned SLSs of signal messages to be transmitted. If there are less than 16 signal links in service in the signal link set between two signal points, 16 SLSs are arbitrarily assigned to these signal links.

On the other hand, when viewed from the perspective of the signal network in Figure 2b, SP a (210) load-sharing the SLS odd and even, STP A (221), STP B (222), STP C (223), STP D 224 assumes load sharing with high number of SLS (HIGH SLS) and low number of SLS (LOW SLS), and STP A (221), STP C (223), STP A (221) and STP D ( Suppose that a signal link set consisting of eight signal links is connected between 224 and SLS is allocated as shown in FIG. 2B, a message having an even SLS among signaling message traffics from SP a 210 to SP b 231 is obtained. To STP A 221, a message with an odd SLS is forwarded to STP B 222. At this time, the STP A 221 transfers the low SLS signal to the STP C 223 and the high SLS STP D 224 among the signal messages to the SP b 231. At this time, since only SLS is an even and small number of "0", "2", "4", and "6" signal messages to STP A 221 and STP C 223, only four signal links among eight signal links are transmitted. Traffic is transmitted, and STP A 221 and STP D 224 also transmit signaling message traffic only on 4 signal links of even number and high number of " 8 ", " 10 ", " 12 ", and " 14 " .

In the case of transmitting the signaling message traffic from SP a 210 to SP c (232), SP d (233), and SP e (234) by the method described above, in the severe case, all signaling message traffic is 4 The traffic is transmitted on only one signal link. In order to prevent this case, each of SP b (231), SP c (232), SP d (233), and SP e (234) in SP a (210), STP A (221), and STP B (222). The path for routing to signal points must be changed sequentially. That is, 16 SLSs should be allocated to the corresponding paths so that the SLSs of all the messages received at each signaling point can be evenly routed. Since the SLSs of the messages received at the corresponding signaling points are not equal, There is a problem that traffic may be biased, signal message traffic may be low, or there may be signal links that do not transmit traffic.

The present invention has been proposed to solve the above problems, and improves the method for routing signal messages in a complex signal network, thereby improving the efficiency of the signal link connected at each signal point and minimizing traffic imbalance. By using the characteristics of each signal point code to increase the stability and efficiency of operation, the information is used as additional information for the load sharing of the signaling message, thereby overcoming the limitations of signal link selection and minimizing the signaling message traffic imbalance while maintaining the same signal. It is an object of the present invention to provide a load-sharing method in common line signaling that can satisfy the same path guarantee for link selection, and a computer-readable recording medium recording a program for realizing the method.

1 is a diagram illustrating an embodiment of a routing label of a general No. 7 signaling message.

2A and 2B are exemplary views of the configuration of a general No. 7 signal network.

3 is a diagram illustrating an embodiment of a signal point code structure in a common common line signaling method.

4 is a diagram illustrating an embodiment of a load sharing method in a common line signaling method according to the present invention;

* Explanation of symbols for the main parts of the drawings

101: DPC102: OPC

103: SLS104: DATA

210: SP a221 ~ 224: STP A ~ STP D

231 ~ 234: SP b ~ SP e

In the method of the present invention for achieving the above object, in the load sharing method in the common line signaling method, the signal link selection (SLS) information of the common line signaling method (No. 7) signal network signal message is determined by a predetermined code. Shifting the signal link selection (SLS) routing information by information; And a second step of arranging routing information shifted in the first step.

Meanwhile, the present invention provides signal link selection (SLS) information of the common line signaling system (No. 7) signal network signal message to a signal message processing system having a large capacity processor for load sharing in the common channel signaling system. A first function of shifting the signal link selection routing information by predetermined code information; And a computer readable recording medium having recorded thereon a program for realizing a second function of aligning routing information shifted from the first function.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is a diagram illustrating an example of a signal point code structure in a common common line signaling method, and illustrates information of each part of a signal point information code.

According to the protocol No.7, the signal point code is composed of 14 bits, each of which has 4 bits of Main Numbering Area (MNA) 301 and 3 bits of Sub Area Code (SNA: Sub Numbering Area (302) and a combination of bits representing a 7-bit Signal End Point (SEP) signal 303. Each signal point code value is uniquely configured in the signal network. Therefore, the signal points of the same area have the same main area code 301 and the same sub area code 302, and have different signal device numbers 303. In addition, since signal points in each region have a similar routing path to one region, load sharing between each routing path or signal links is possible using the signal device number 303 among the signal point codes.

4 is a diagram illustrating an example of a load sharing method in a common line signaling method according to the present invention, wherein a lower 4 bits of lower 7 bits of information indicating a signal device number among signal point codes are transmitted to a corresponding region; Each routing path is represented by shifting the SLS for load sharing.

As shown in FIG. 4, rather than having the same routing path (representing “a to p” in FIG. 4) for each existing signal point code, SLS according to the lower 4 bit information of the signal device number among the signal point codes. By shifting the star routing information, it can have various routing paths, thus indicating that the load sharing of signaling message traffic routed to the corresponding area is possible.

As described above, load sharing of signaling message traffic is possible using new additional information in addition to SLS used for load sharing between signaling points having the same routing information, and the new additional information includes The signal route identifier (ID) information for transmitting the signaling message, the signal link set identifier (ID) for transmitting the signaling traffic, a part of the local signaling point code, or the originating point code (OPC) of the signaling message, including some of the signaling device numbers have.

As described above, the method of the present invention may be implemented as a program and stored in a recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.) in a computer-readable form.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes are possible in the art without departing from the technical spirit of the present invention. It will be clear to those of ordinary knowledge.

As described above, the present invention refers to additional information such as an incoming signal point code, an outgoing signal point code, a local signal point code, etc. in addition to the SLS information of the signal message which is the existing load sharing information in routing the signal message. By providing an equal load sharing of the entire network, there is an effect that can increase the efficiency of the signaling network resources.

In addition, the present invention has the effect of efficiently using the limited signal network configuration resources by ensuring the order of the messages required by the No.7 protocol while evenly distributing traffic on each signal link.

Claims (4)

In the load sharing method in the common line signaling method, Shifting the signal link selection (SLS) routing information from the signal link selection (SLS) information of the common line signaling (No. 7) signal network signal message by predetermined code information; And A second step of arranging routing information shifted in the first step Load sharing method in common line signaling method comprising a. The method of claim 1, The predetermined code information, Calling point code of the signaling message, Originating point code of the signaling message, Localization signaling point code of the signaling message, Signaling link identifier (ID) for receiving the signaling message, Signaling linkset identifier (ID) for receiving the signaling message Load sharing method in the common line signaling method comprising a). The method according to claim 1 or 2, The predetermined code information, Calling point code of the signaling message, Originating point code of the signaling message, Localization signaling point code of the signaling message, Signal link identifier (ID) receiving the signaling message, Signal linkset identifier (ID) receiving the signaling message Load information in the common line signaling method, characterized in that at least one or more code information selected. In the signal message processing system having a large capacity processor for load sharing in common line signaling, A first function of shifting the signal link selection (SLS) routing information by signal code selection (SLS) information of the common line signaling method (No. 7) signal network signal message by predetermined code information; And A second function of sorting routing information shifted from the first function A computer-readable recording medium having recorded thereon a program for realizing this.