CN1254117C - Method for dynamic load share of command points and subsystems - Google Patents

Abstract

The invention relates to a method for dynamic load sharing of signaling points and subsystems. The realization of the method solves the problem that when the signaling transfer point (STP) realizes dynamic load sharing of signaling points or subsystems, only 16 links can be used to transmit orderly messages, and the load balancing of each link cannot be achieved. Using this invention can make full use of all links from STP to the destination signaling point or subsystem, and the message flow of each link is balanced . Segment the origin signaling point code (OPC) of the ordered message according to the signaling segmentation point code set in the data table, and transmit the segmented message to two destination signaling points or subsystems for load sharing , the destination signaling point or subsystem can be selected to transmit the message according to the parity of the link selection code (SLS) value of the message; the destination signaling point or subsystem can be selected to transmit the message according to the size of the SLS value of the message; or it can be ignored SLS, directly selects the destination signaling point or subsystem to transmit messages according to the segmentation of OPC.

Description

Method of Dynamic Load Sharing of Signaling Points and Subsystems

technical field

The invention relates to a signaling system, in particular to a signaling point in a signaling connection control part (SCCP) module of the signaling system and a method for dynamic load sharing of subsystems.

Background technique

In the signaling system, especially the No. 7 signaling system, the number of links from the signaling transfer point (STP) to the destination signaling point (SP) is determined by the link selection code (SLS) of the message sent to the STP. According to the international regulations of the SCCP protocol, SLS is represented by 4 bits, so the range of SLS value is 0-15, therefore, the maximum number of links from STP to SP is 16. When the message traffic is large, 16 links restrict the bandwidth and cannot meet the performance requirements of STP, so the number of links needs to be increased to meet the demand.

Currently, the dual signaling point and the dynamic load sharing method of the subsystem based on the dual signaling point are implemented in the SCCP module. STP and SP can be directly connected or non-directly connected. Depending on the translation results of the Global Title (GT for short), the STP connection may be a signaling point (defined as DPC+GT or DPC+NEW GT), or a subsystem (defined as DPC+SSN), However, the SCCP dual-signaling point-based and dual-signaling-point-based subsystem dynamic load sharing methods are the same, so only the SCCP dual-signaling point-based subsystem dynamic load sharing method will be described below.

The messages processed by SCCP are classified into out-of-order messages and ordered messages according to the order. Forwarded out-of-order messages can be re-selected for SLS to send out; forwarded ordered messages require messages containing the same SLS to be sent to the SP in the order they entered, so The same SLS needs to be sent sequentially from the same link, and the SLS in the message cannot be changed at this time.

Due to the characteristics of out-of-order messages and ordered messages, when implementing SCCP signaling point or subsystem load sharing, the existing method can only realize full load sharing of out-of-order messages, increasing the number of links to 32, And achieve traffic balance; for ordered messages, only partial load sharing can be achieved, and the purpose of increasing the number of links cannot be achieved, nor can traffic balance be achieved.

For out-of-order messages, the dynamic load sharing of subsystems can be realized by round-robin method.

Referring to Fig. 1, when STP 101 forwards an out-of-order message to a certain destination subsystem, it is first sent to the main subsystem (DPC1+SSN) 102, and the value of SLS is 0; when the second message to the destination subsystem When forwarding, select the standby subsystem (DPC2+SSN) 103, and the value of SLS is 0; when the 3rd message to the destination subsystem is forwarded, select DPC1+SSN 102, and the value of SLS is 1; When forwarding the message to the destination subsystem, select DPC2+SSN 103, the value of SLS is 1; ...; in this way until the value of SLS reaches 15, and then cycle through the above method again to get the message sent to a certain The messages of the signaling point are evenly load-shared among the 32 links. The value of the above SLS is obtained by the following two formulas.

SLS(DPC1)=(SLS(DPCl)+1)%16

SLS(DPC2)=(SLS(DPC2)+1)%16

These two expressions reassign the SLS of the message by taking the remainder of SLS(DPC1)+1 and SLS(DPC2)+1. Assign the SLS value of the message sent to DPC1+SSN and DPC2+SSN first to 0, and then use the above two formulas to perform a remainder operation to reassign the SLS value of the message sent to the active and standby subsystems.

For ordered messages, the existing load sharing algorithm is as follows:

According to the parity of the SLS value of the ordered message sent to the STP, the active or standby subsystem is selected for load sharing, and the message is forwarded. Send messages with SLS values of 0, 2, 4, ..., 14 to the active subsystem, and messages with SLS values of 1, 3, 5, ..., 15 to the standby subsystem, and vice versa Of course.

For the load sharing algorithm of the above sequenced messages, since SLS has only 16 values, it can only correspond to 16 links, so the parity distribution according to the SLS value can only use the signaling points belonging to the active subsystem and the standby subsystem at most The two 8 links in the network can only correspond to 16 links, and cannot all use STP to connect to the 32 links of the signaling points of the active subsystem and the standby subsystem, and the purpose of increasing the number of links cannot be achieved. , and the traffic of each link is unbalanced.

Contents of the invention

The purpose of the present invention is to relate to the signaling point in the SCCP module of signaling system and the method for subsystem dynamic load sharing, apply this method and can realize orderly message from STP to destination signaling point or the uniform distribution of all links of destination subsystem load sharing.

The technical scheme for realizing the present invention is as follows: the method for dynamic load sharing of signaling points and subsystems, selects the main standby signaling point or the main standby subsystem for dynamic load sharing to the orderly messages sent to the signaling transfer point, and its characterized by at least including:

A. In the data table, configure the data according to the number of signaling points or subsystems for load sharing, and determine the signaling segmentation point code;

B. compare the size of the source signaling point code and the signaling subsection point code of the ordered message, divide the part of the source signaling point code smaller than the signaling subsection point code into the first section; the source signaling point code is greater than The part equal to the signaling segmentation point code is divided into the second segment;

C. Send the first segment of ordered messages to be forwarded to the active and standby signaling points or the active and standby subsystems, and send the second segment of ordered messages to be forwarded to the standby and active signaling points or the standby and main subsystems.

In the above step A, when there are two signaling points or subsystems for load sharing, the signaling segmentation point code in the data table is set to half of the originating signaling point code of the ordered message.

Described step C also includes carrying out the selection and forwarding of the main standby signaling point or the main standby subsystem according to the parity of the link selection code (SLS) value of the ordered message, and the first section of the ordered message to be forwarded Messages with an odd SLS value are sent to the primary signaling point or primary subsystem, and messages with an even SLS value are sent to the backup signaling point or backup subsystem; the SLS value in the second message to be forwarded is odd The message is sent to the standby signaling point or the standby subsystem, and the message with an even SLS value is sent to the main signaling point or the main subsystem.

Described step C, also comprises according to the parity of the SLS value of the orderly message, carries out the selective forwarding of main-standby signaling point or main-standby subsystem, the SLS value in the first section of orderly message to be forwarded is even-numbered message Sent to the main signaling point or the main subsystem, the message with an odd SLS value is sent to the standby signaling point or the standby subsystem; the message with an even SLS value in the second message to be forwarded is sent to the standby signaling Point or standby subsystem, the message with odd SLS value is sent to the main signaling point or main subsystem.

Described step C, also comprises carrying out the selective forwarding of active-standby signaling point or active-standby subsystem according to the size of the SLS value of the ordered message, the SLS value in the ordered message of the first section to be forwarded is the message of small value Sent to the main signaling point or the main subsystem, the message with a large SLS value is sent to the standby signaling point or the standby subsystem, and the message with a small SLS value in the second message to be forwarded is sent to the standby Signaling points or standby subsystems, messages with a large SLS value are sent to the main signaling point or main subsystem.

Described step C also includes carrying out the selective forwarding of primary and secondary signaling points or primary and secondary subsystems according to the size of the SLS value of the ordered message, and the SLS value in the first segment of the ordered message to be forwarded is a message with a large value Send to the main signaling point or the main subsystem, send the message with a small SLS value to the backup signaling point or the backup subsystem, and send the message with a large SLS value in the second message to be forwarded to the backup Signaling points or standby subsystems, messages with small SLS values are sent to the main signaling point or main subsystem.

The message with a small SLS value refers to a message with an SLS value of 0-7, and the message with a large SLS value refers to a message with an SLS value of 8-15.

The technical solution for realizing the present invention can also be like this: the method for dynamic load sharing of signaling points and subsystems, selects the main standby signaling point or the main standby subsystem for dynamic load sharing of the ordered messages sent to the signaling transfer point , the method includes at least:

A. In the data table, configure the data according to the number of signaling points or subsystems for load sharing, and determine the signaling segmentation point code;

B. compare the size of the source signaling point code and the signaling subsection point code of the ordered message, divide the part of the source signaling point code smaller than the signaling subsection point code into the first section; the source signaling point code is greater than The part equal to the signaling segmentation point code is divided into the second segment;

C. Send all the first segment of ordered messages to be forwarded to the main signaling point or the main subsystem, and send all the second segment of ordered messages to be forwarded to the backup signaling point or the backup subsystem.

Preferably, in said step A, when there are two signaling points or subsystems for load sharing, the signaling segment point code in the data table is set as the origin signaling point code of the ordered message half.

The technical solution for realizing the present invention can also be like this: the method for dynamic load sharing of signaling points and subsystems, select the main standby signaling point or the main standby subsystem to carry out dynamic load sharing for the ordered messages sent to the signaling transfer point , the method includes at least:

A. In the data table, configure the data according to the number of signaling points or subsystems for load sharing, and determine the signaling segmentation point code;

B. compare the size of the source signaling point code and the signaling subsection point code of the ordered message, divide the part of the source signaling point code smaller than the signaling subsection point code into the first section; the source signaling point code is greater than The part equal to the signaling segmentation point code is divided into the second segment;

C. Send all the first segment of ordered messages to be forwarded to the backup signaling point or the backup subsystem, and send all the second segment of ordered messages to be forwarded to the main signaling point or the main subsystem.

Preferably, in said step A, when there are two signaling points or subsystems for load sharing, the signaling segment point code in the data table is set as the origin signaling point code of the ordered message half.

Preferably, in the step A, there are three signaling points or subsystems for load sharing, including two main signaling points or main subsystems and one public backup signaling point or backup subsystem system, set the signaling segment point code in the data table to 1/3 of the source signaling point code of the ordered message.

The method of the present invention is to increase the signaling segmentation point code in the data table, use the signaling segmentation point code to segment the origin signaling point code of the ordered message, and combine the segmented message with its SLS value Select signaling points or subsystems to realize dynamic load sharing of signaling points and subsystems.

Using this method can realize dynamic load sharing of dual signaling points and subsystems, increase the number of links for load sharing from signaling transfer points to signaling points or subsystems to 32, and realize the 32 links load balancing, and the two signaling points or subsystems regarded as load sharing are in the same entity, that is, when the destination signaling point supports the feature of multiple signaling points, the number of links from the signaling transfer point to the destination signaling point for 32 pieces.

Using this method can also realize dynamic load sharing of multiple signaling points or subsystems, so as to make full use of all links from signaling transfer points to signaling points or subsystems, and achieve message flow balance of each link. When there are three signaling points or subsystems for load sharing, the number of links for load sharing from signaling transfer points to signaling points or subsystems can be increased to 48, and these 48 chains can be realized The message flow of the road is balanced.

Description of drawings

Fig. 1 is a schematic diagram of SCCP's out-of-order messages using a round-robin method to select the active and standby subsystems to realize dynamic load sharing;

Fig. 2 is in the method for the subsystem dynamic load sharing based on double signaling point, the orderly message of SCCP is selected according to the parity of OPC segmentation and SLS value the schematic diagram of main backup subsystem so as to realize dynamic load sharing;

Fig. 3 is in the method for the subsystem dynamic load sharing based on double signaling point, the orderly message of SCCP is selected according to the size of OPC subsection and SLS value the schematic diagram of main backup subsystem to realize dynamic load sharing;

Fig. 4 is in the method for the subsystem dynamic load sharing based on double signaling points, the orderly message of SCCP is selected the schematic diagram of active and standby subsystems to realize dynamic load sharing according to the segment of OPC;

Fig. 5 is a schematic diagram of selecting an active and standby subsystem by SCCP ordered messages according to OPC segments in the method of dynamic load sharing of subsystems based on three signaling points to realize dynamic load sharing.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. Since the dynamic load sharing of the subsystem is based on the signaling point, the method of dynamic load sharing of the signaling point and the subsystem is the same, so only the dynamic load sharing method of the SCCP subsystem will be described below.

Referring to Figure 2, the subsystem for load sharing is based on dual signaling points. Add a configuration field in the subsystem data table, that is, the signaling segment point code opc_code, and set opc_code to half of the OPC of the ordered message to be forwarded, so that the OPC can be divided into two segments by it, so that it can be forwarded The ordered message of is also divided equally into two segments. The origin signaling point code of OPC<opc_code is set to OPC1201, the origin signaling point code of OPC>=opc_code is set to OPC2 202, OPC1 201, OPC2 202 can be obtained from the routing label (LABEL) of the message. The message of OPC1 201 is dynamically assigned to the main subsystem (DPC1+SSN) 204 or the standby subsystem (DPC2+SSN) 205, that is, the message is passed along the solid line in the figure; and the message of OPC2 202 is dynamically assigned to DPC2 +SSN 205 or DPC1+SSN 204, that is, to transmit messages along the dotted line in the figure, and the two form a complementary relationship.

There are three ways of dynamically allocating messages mentioned above, as shown in FIGS. 2 , 3 , and 4 respectively.

Among them, Figure 4 is for message allocation according to OPC segments, while Figure 2 and Figure 3 are for message allocation according to its SLS value. Because the SLS values of the messages in the entire signaling network are evenly distributed, it is possible to achieve even load sharing among the 32 links by selecting the primary and backup subsystems by combining the OPC segments of the messages with their SLS values.

Referring to Fig. 2, the ordered message sent to STP 203 is segmented by OPC and combined with the parity of its SLS value to select the active and standby subsystems for load sharing. When the source signaling point of the message is coded as OPC1 201, the message with an odd SLS value is sent to DPC1+SSN 204, and the message with an even SLS value is sent to DPC2+SSN 205; when the source signaling point of the message is coded as OPC2 At 202, a message with an odd number of SLS values is sent to DPC2+SSN 205, and a message with an even number of SLS values is sent to DPC1+SSN 204.

It is also possible to send a message with an even number of SLS values in the message of OPC1 201 to DPC1+SSN204, and send a message with an odd number of SLS values to DPC2+SSN 205; send a message with an even number of SLS values in the message of OPC2 202 to DPC2+SSN 205, a message with an odd SLS value is sent to DPC1+SSN 204.

Referring to Fig. 3, the orderly message sent to STP 203 is segmented by OPC and combined with the size of its SLS value to select the active and standby subsystems for load sharing. When the source signaling point code of the message is OPC1 201, send the message with a small SLS value, that is, a message with an SLS value of 0 to 7, to DPC1+SSN204, and send a message with a large SLS value, that is, a message with an SLS value of 8 to 15 Send to DPC2+SSN 205; When the source signaling point code of the message is OPC2 202, the message with SLS value is small value is sent to DPC2+SSN 205, and the message with SLS value is large value is sent to DPC1+SSN 204.

Also can send to DPC1+SSN204 the message that SLS value is a large value in the message of OPC1 201, the message that SLS value is a small value is sent to DPC2+SSN 205; The message that SLS value is a large value in the message of OPC2 202 is sent to DPC2+SSN 205, the message that the SLS value is a small value is sent to DPC1+SSN 204.

Referring to Fig. 4, according to the segmentation of the OPC of the ordered message sent to STP 203, all the messages whose source signaling point is encoded as OPC1 201 are sent to DPC1+SSN 204, and all the messages whose source signaling point is encoded as OPC2 202 Send to DPC2+SSN 205.

It is also possible to send all the messages whose source signaling point is encoded as OPC2 202 to DPC1+SSN204, and send all the messages whose source signaling point is encoded as OPC1 201 to DPC2+SSN 205.

The use of the above three methods can make the messages of OPC1 and OPC2 complement each other when they are sent to the main and standby subsystems, just use up 32 links, and the load of each link is balanced.

If the main subsystem DPC1+SSN and the standby subsystem DPC2+SSN are in the same entity, that is, the SP connected with the STP supports the multi-signaling point feature, then using the present invention can increase the 16 links of the STP to the SP to 32 articles.

The above subsystem dynamic load sharing method is based on the dynamic load sharing of dual signaling points. Through the data configuration of the subsystem data table, OPC is segmented, combined with the grouping of ordered messages according to their SLS values, the dynamic load of ordered messages for multi-signaling points and subsystems based on multi-signaling points can also be realized share. Taking the dynamic load sharing of the subsystem based on three signaling points as an example, the specific configuration is as follows:

Referring to Fig. 5, it is the dynamic load sharing of the subsystem based on three signaling points. These three subsystems form two destination subsystems, one of which is a backup subsystem common to the two destination subsystems, and two different GT configurations need to be set for the two destination subsystems. In this dynamic load sharing of subsystems based on three signaling points, messages can only be sent to the active and standby subsystems in the manner of segmenting OPC. The backup subsystems of the main subsystems DPC1+SSN 504 and DPC3+SSN 506 are both DPC2+SSN 505, that is, DPC2+SSN 505 is a common backup subsystem. Therefore, the forwarded message is divided into unequal segments, and the The segmented messages are respectively sent to the corresponding primary subsystem or standby subsystem, so that the messages sent to DPC2+SSN 505 are equal to the messages sent to DPC1+SSN 504 and DPC3+SSN 506. You can set opc_code to 1/3 of OPC, set the origin signaling point code of OPC<opc_code to OPC1 501, and set the origin signaling point code of OPC>=opc_code to OPC2 502. Select main standby subsystem DPC1+SSN504 and DPC2+SSN 505 or DPC3+SSN 506 and DPC2+SSN 505 according to the message, send all the messages of OPC1 501 to the common standby subsystem DPC2+SSN 505, and send all the messages of OPC2 502 Send to the main subsystem DPC1+SSN 504 or DPC3+SSN 506.

The signaling point and the subsystem dynamic load sharing method in the SCCP module of the present invention are used in the STP system, and through experiments and simulations, it can be realized that when the dual signaling points or subsystems are used for dynamic load sharing, the STP can be transferred to the dual signaling points or The uniform load sharing of the message flow of the 32 links of the subsystem effectively enhances the performance of the STP.

Through the data configuration of the data table, the OPC is segmented, and the segmented messages are grouped according to the SLS value to select the main and standby signaling points or the main and standby subsystems, and the dynamics of multiple signaling points and subsystems can also be realized Load sharing can make full use of all links from STP to signaling points or subsystems, and achieve message flow balance of each link.

Claims (12)

1. the method for signalling point and subsystem dynamic load share of command is selected active and standbyly with signalling point or active and standbyly carry out dynamic load share of command with subsystem to the orderly message that sends to Signalling Transfer Point, it is characterized in that comprising at least:

A. in tables of data, do data configuration, determine signaling segmentation point coding according to the number of the signalling point of making load sharing or subsystem;

B. the size that plays OPC Origination Point Code and signaling segmentation point coding of more orderly message is divided into first section with playing the part of OPC Origination Point Code less than signaling segmentation point coding; Be divided into second section with playing the part of OPC Origination Point Code more than or equal to signaling segmentation point coding;

C. first section orderly message to be transmitted is mail to primary and backup signalling point or primary and backup subsystem, second section orderly message to be transmitted is mail to standby and main with signalling point or the standby and main subsystem of using.

2. the method for signalling point according to claim 1 and subsystem dynamic load share of command, it is characterized in that: in the described steps A, when being used as the signalling point of load sharing or subsystem and being two, the signaling segmentation point coding in the tables of data is set to half of origin signaling point code of orderly message.

3. the method for signalling point according to claim 1 and subsystem dynamic load share of command, it is characterized in that: described step C, the parity that also comprises the link selection code SLS value of the orderly message of basis is carried out active and standby with signalling point or active and standby selection forwarding with subsystem, SLS value in first section orderly message to be transmitted is main with signalling point or the main subsystem of use for the message of odd number sends to, and the SLS value sends to standby signalling point or standby subsystem for the message of even number; SLS value in second section message to be transmitted is sent to standby signalling point or standby subsystem for the message of odd number, and SLS value is main with signalling point or lead and use subsystem for the message of even number sends to.

4. the method for signalling point according to claim 1 and subsystem dynamic load share of command, it is characterized in that: described step C, the parity that also comprises the SLS value of the orderly message of basis is carried out active and standby with signalling point or active and standby selection forwarding with subsystem, SLS value in first section orderly message to be transmitted is main with signalling point or the main subsystem of use for the message of even number sends to, and the SLS value sends to standby signalling point or standby subsystem for the message of odd number; SLS value in second section message to be transmitted is sent to standby signalling point or standby subsystem for the message of even number, and SLS value is main with signalling point or lead and use subsystem for the message of odd number sends to.

5. the method for signalling point according to claim 1 and subsystem dynamic load share of command, it is characterized in that: described step C, the size that also comprises the SLS value of the orderly message of basis is carried out active and standby with signalling point or active and standby selection forwarding with subsystem, SLS value in first section orderly message to be transmitted is main with signalling point or the main subsystem of using for the message of little value sends to, the SLS value sends to standby signalling point or standby subsystem for the message of big value, SLS value in second section message to be transmitted is sent to standby signalling point or standby subsystem for the message of little value, and SLS value is used subsystem for the message of big value sends to the master with signalling point or master.

6. the method for signalling point according to claim 1 and subsystem dynamic load share of command, it is characterized in that: described step C, the size that also comprises the SLS value of the orderly message of basis is carried out active and standby with signalling point or active and standby selection forwarding with subsystem, SLS value in first section orderly message to be transmitted is main with signalling point or lead and use subsystem for the message of big value sends to, the SLS value sends to standby signalling point or standby subsystem for the message of little value, SLS value in second section message to be transmitted is sent to standby signalling point or standby subsystem for the message of big value, and SLS value is used subsystem for the message of little value sends to the master with signalling point or master.

7. according to the method for claim 5 or 6 described signalling points and subsystem dynamic load share of command, it is characterized in that: described SLS value is meant that for the message of little value the SLS value is 0～7 message, and the SLS value is meant that for the message of big value the SLS value is 8～15 message.

8. the method for signalling point and subsystem dynamic load share of command is selected active and standbyly with signalling point or active and standbyly carry out dynamic load share of command with subsystem to the orderly message that sends to Signalling Transfer Point, it is characterized in that comprising at least:

A. in tables of data, do data configuration, determine signaling segmentation point coding according to the number of the signalling point of making load sharing or subsystem;

B. the size that plays OPC Origination Point Code and signaling segmentation point coding of more orderly message is divided into first section with playing the part of OPC Origination Point Code less than signaling segmentation point coding; Be divided into second section with playing the part of OPC Origination Point Code more than or equal to signaling segmentation point coding;

C. first section orderly message to be transmitted is all mail to the master and use subsystem, second section orderly message to be transmitted is all mail to standby signalling point or standby subsystem with signalling point or master.

9. the method for signalling point according to claim 8 and subsystem dynamic load share of command, it is characterized in that, in the described steps A, when being used as the signalling point of load sharing or subsystem and being two, the signaling segmentation point coding in the tables of data is set to half of origin signaling point code of orderly message.

10. the method for signalling point and subsystem dynamic load share of command is selected active and standbyly with signalling point or active and standbyly carry out dynamic load share of command with subsystem to the orderly message that sends to Signalling Transfer Point, it is characterized in that comprising at least:

A. in tables of data, do data configuration, determine signaling segmentation point coding according to the number of the signalling point of making load sharing or subsystem;

B. the size that plays OPC Origination Point Code and signaling segmentation point coding of more orderly message is divided into first section with playing the part of OPC Origination Point Code less than signaling segmentation point coding; Be divided into second section with playing the part of OPC Origination Point Code more than or equal to signaling segmentation point coding;

C. first section orderly message to be transmitted is all mail to standby signalling point or standby subsystem, second section orderly message to be transmitted is all mail to main with signalling point or the main subsystem of using.

11, the method for signalling point according to claim 10 and subsystem dynamic load share of command, it is characterized in that, in the described steps A, when being used as the signalling point of load sharing or subsystem and being two, the signaling segmentation point coding in the tables of data is set to half of origin signaling point code of orderly message.

12, the method for signalling point according to claim 10 and subsystem dynamic load share of command, it is characterized in that: in the described steps A, signalling point or the subsystem of being used as load sharing are three, comprise two masters with signalling point or main during with subsystem and a public standby signalling point or standby subsystem, the signaling segmentation point coding in the tables of data be set to orderly message the origin signaling point code 1/3.

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