CN101052019B

CN101052019B - Method for selecting message bearing link and signaling switch point

Info

Publication number: CN101052019B
Application number: CN2007100910238A
Authority: CN
Inventors: 李育斌; 李云峰; 李春生
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2007-04-05
Filing date: 2007-04-05
Publication date: 2010-10-06
Anticipated expiration: 2027-04-05
Also published as: CN101052019A

Abstract

The invention comprises: a receiving unit used for receiving the message containing signaling link selection (SLS) identifier and distinguishing identifier; a route selection unit used for selecting at least two links for the message containing same SLS identifier according to the SLS identifier and distinguishing identifier; a bearer unit used for using the selected at least two links to bearing said message. The distinguishing identifier comprises the originating point code (OPC), or the global translation (GT) code, or service indication (SI) identifier.

Description

Select the method and the Signalling Transfer Point of message bearing link

Technical field

The present invention relates to communication technical field, relate in particular to a kind of method and Signalling Transfer Point of selecting message bearing link.

Background technology

Under the definition of the Signaling System Number 7 agreement of International Telecommunication Union, message is transmitted (MTP3) layer need carry out the order-preserving transmission to message, so-called order-preserving transmission, the signaling link that is based on message selects (SLS) sign to realize, the identical message of SLS sign is transmitted on same link, and SLS sign message inequality is transmitted on different links.

SLS identifies with binary number representation, the length difference of the SLS sign of different agreement regulations, and the length of the SLS sign of ITU agreement regulation is 4 bits (bits), has 16 kinds of different SLS so and identifies.

The message that Original Signaling Point in the MTP3 layer (SP) sends is transmitted to destination signaling point by Signaling Transfer Point, because the SLS of message sign has 16 kinds at most, the link group between two adjacent STP and SP or STP and STP at most also can only dispose 16 links.If STP receives that the species number of the SLS sign that message comprises is identical with the link number of link group configuration, the principle of transmitting according to order-preserving so, these message distribution can be transmitted on 16 links of link group, as shown in Figure 1, STP1 can receive the message that comprises 16 kinds of SLS signs of SP1 and SP2, STP1 passes to SP3 on the different link with each message distribution according to the SLS of message sign in the link group between STP1 and the SP3, thereby has reached the link load equilibrium of this link group inside.

In realizing process of the present invention, the inventor finds to exist at least in the prior art following technical problem:

In some cases, the species number that STP receives the SLS sign that message comprises is during less than the link number of link group configuration, some links of link group must be in idle condition, can be on this link pass-along message, that is to say that the equilibrium that can not reach message load in this link group shares.

As shown in Figure 2, STP1 and STP3, STP1 and STP4, STP2 and STP3, link group between STP2 and the STP4 disposes 16 links, SP1 transmits the message that SLS is designated odd number by STP1, the message that SLS is designated even number is transmitted by STP2, SP2 also is designated SLS the message of odd number and transmits by STP1, the message that SLS is designated even number is transmitted by STP2, so, the species number of the SLS that message the comprised sign that STP3 and STP4 can receive mostly is 8 kinds most, less than the number of links 16 that link group disposed, the equilibrium that can not reach message load in link group is shared.

And for example shown in Figure 3, STP1 has two to the link group of SP6: 6 and 7, each link group has disposed 16 links, the species number of the SLS that message the comprised sign that STP1 can receive mostly is 16 kinds most, several 32 less than the total link that can select, the equilibrium that can not reach message load on the link between STP and the SP6 is shared.

Summary of the invention

The embodiment of the invention provides a kind of method and Signalling Transfer Point of selecting message bearing link, in order to solve the link that the Signalling Transfer Point that exists in the prior art can not make full use of the link group configuration, makes the problem of link load sharing inequality.

The embodiment of the invention provides a kind of Signalling Transfer Point, and this Signalling Transfer Point comprises:

Receiving element is used to receive the message that comprises signaling link selection SLS sign and distinguishing identifier;

The routing unit comprises virtual identifying computing unit and link selection unit; Described virtual identifying computing unit, each message that is used for receiving at receiving element according to sign of the SLS in the message and distinguishing identifier, obtains this message corresponding virtual SLS sign; Described link selection unit is used for the virtual SLS sign of the message that calculates according to the virtual identifying computing unit, be the different link of message selection of corresponding different virtual SLS sign in link group;

Load bearing unit is used to utilize the described message of the selected link bearer in routing unit.

The embodiment of the invention provides a kind of method of selecting message bearing link, and this method comprises:

Reception comprises the message of SLS sign and distinguishing identifier;

At described each message that receives,, obtain this message corresponding virtual SLS sign according to sign of the SLS in the message and distinguishing identifier; The message that is corresponding different virtual SLS sign in link group is selected different links;

Utilize the described message of selected link bearer.

Technique scheme has following technique effect:

In the embodiment of the invention, after receiving the message that comprises SLS sign and OPC, message bearing by will comprising identical SLS sign, different OPC is at least two links of link group, perhaps, the message bearing that will comprise identical SLS sign, different GT sign indicating numbers is at least two links of link group, perhaps, the message bearing that will comprise identical SLS sign, different SI sign is at least two links of link group, utilize the link that link group disposed more fully, thereby made link load sharing balanced more.When receiving message from the broadband connection group, the link that the present invention is disposed by utilizing link group more fully, message sharing on narrow band link in broadband is balanced more, can reduce the impact that broadband message causes narrow band link.

Description of drawings

Fig. 1 is the networking diagram of link load sharing example one in the prior art;

Fig. 2 is the networking diagram of link load sharing example two in the prior art;

Fig. 3 is the networking diagram of link load sharing example three in the prior art;

Fig. 4 provides the schematic flow sheet of method for the embodiment of the invention;

Fig. 5 A is the networking diagram of the embodiment of the invention one;

Fig. 5 B is the message link selection schematic diagram in the embodiment of the invention one;

Fig. 6 A is the networking diagram of the embodiment of the invention two;

Fig. 6 B is the message link selection schematic diagram of STP3 in the embodiment of the invention two;

Fig. 6 C is the message link selection schematic diagram of STP4 in the embodiment of the invention two;

Fig. 6 D is the message link selection schematic diagram of STP5 in the embodiment of the invention two;

Fig. 6 E is the message link selection schematic diagram of STP6 in the embodiment of the invention two;

Fig. 7 provides the schematic flow sheet of method for the embodiment of the invention;

Fig. 8 is the message link selection schematic diagram in the embodiment of the invention three;

Fig. 9 is the explanation schematic diagram of message SI in the embodiment of the invention;

Figure 10 is the networking diagram of the embodiment of the invention four;

Figure 11 is the message link selection schematic diagram in the embodiment of the invention four;

The structural representation of the Signalling Transfer Point that Figure 12 provides for the embodiment of the invention.

Embodiment

The link that is disposed in order to utilize link group more fully, make link load sharing balanced more, the embodiment of the invention provides a kind of method of selecting message bearing link, in this method, STP selects (SLS) sign and distinctive mark according to the signaling link that receives in the message, from link group, select this message of link bearer, this distinctive mark comprises initial signaling point code (OPC), or caller overall situation translation (GT) sign indicating number, or messaging service indication (SI) sign, three kinds of different situations at distinctive mark are specifically described respectively below:

When distinctive mark is initial signaling point code (OPC), the embodiment of the invention provides a kind of message signaling link to select (SLS) sign and initial signaling point code (OPC) binding to select the method for message bearing link, in this method, the link that Signalling Transfer Point STP selects this message of carrying according to the SLS sign and the OPC sign indicating number of message carries the message that comprises identical SLS sign, different OPC sign indicating numbers at least two links of link group.

Concrete, when STP transmits message,,, obtaining this message corresponding virtual SLS sign according to sign of the SLS in the message and OPC sign indicating number at its each message that receives, the message bearing that corresponding different virtual SLS is identified is on the different link of link group then.

Here, according to sign of the SLS in the message and OPC sign indicating number, the specific implementation method that obtains this message corresponding virtual SLS sign is:

STP receives that identical bit is set to remove bit in each SLS sign of message, and this STP receives in each OPC sign indicating number of message and exists the bit of difference to be set to add bit; Receive in the SLS sign of message in each of STP, will remove the bit of bit and remove, and add in the OPC sign indicating number of this message, constitute this message corresponding virtual SLS sign at the bit that adds bit.

During specific implementation, can also link expansion routing parameter be set at STP, this parameter is used for identifying set removal bit and adds bit, then when the virtual SLS that calculates message identifies, can will remove at the bit of removing bit in the SLS sign of message according to set link expansion routing parameter, choose in the OPC sign indicating number of this message at the bit that adds bit, add in the SLS sign of carrying out after bit is removed, generate this message corresponding virtual SLS sign.

Because the figure place of the SLS sign in the figure place that need to guarantee virtual SLS sign and the message is identical,, needs to guarantee to remove bit and equate with the bit number of interpolation bit being provided with when removing bit and adding bit.

Referring to Fig. 4, the specific implementation step of this method can be as follows:

Step 401: at STP configuration link group expansion routing parameter;

When the SLS of message sign is represented with 4 bits, represent with 8 bits at the link group expansion routing parameter of STP configuration.The equipping rules of this link group expansion routing parameter is:

Which bit in low 4 SLS signs that are used for representing message of link group expansion routing parameter does not participate in the calculating of the virtual SLS sign of this message, is called the removal bit with not participating in the bit that the virtual SLS sign of message calculates.Concrete method for expressing can for: if certain bit among low 4 of link group expansion routing parameter is 1, corresponding bit did not participate in the calculating of the virtual SLS sign of this message during then the SLS of message identified, such as, low 4 of link group expansion routing parameter is 0010, the SLS of message is designated 0101, and then second " 0 " in the SLS of the message sign does not participate in the calculating of the virtual SLS sign of this message.Which bit of low 4 participates in the calculating of the virtual SLS sign of this message in high 4 OPC sign indicating numbers that are used for representing message of link group expansion routing parameter, is called the interpolation bit with participating in the bit that the virtual SLS sign of message calculates.Concrete method for expressing can for: if certain bit among high 4 of link group expansion routing parameter is 1, then corresponding bit participates in the calculating of the virtual SLS sign of this message in the OPC sign indicating number of message, such as, high 4 of link group expansion routing parameter is 0001, low 4 of the initial signaling point code of message is 0001, and then first of the initial signaling point code of message " 1 " participates in the calculating of the virtual SLS sign of this message.

When which position does not participate in the calculating of virtual SLS sign of this message in determining the SLS sign of message, the principle of being followed is: STP receives the bit that virtual SLS sign that all the same figure place of numerical value in all SLS sign of message is set to not participate in this message is calculated, for example, the kind number that a certain STP receives the SLS sign of message is eight kinds, be respectively: 0000,0001,0010,0011,0100,0101,0110 and 0111, the 4th numerical value is " 0 " in these eight kinds of SLS signs, can determine that so the 4th bit of the SLS sign of message does not participate in the calculating of the virtual SLS sign of this message, low 4 of corresponding link group expansion routing parameter can be set to 1000.

When which position of low 4 participates in the calculating of virtual SLS sign of this message in determining the OPC sign indicating number of message, the principle of being followed is: STP receives the bit of calculating that the differentiated bit of numerical value in all OPC sign indicating numbers of message is set to participate in the virtual SLS sign of this message, low 4 of the OPC sign indicating number of for example a certain STP reception message are respectively 0001,0010,0011, first of these OPC sign indicating numbers, second is differentiated, can determine first bit of OPC sign indicating number of message or the calculating of the virtual SLS sign that second bit participates in this message so, high 4 of corresponding link group expansion routing parameter can be set to 0001 or 0010.Here, concrete first still second calculating that participates in the virtual SLS sign of this message selecting the OPC sign indicating number of message, can select according to the load of three initial signaling point codes, suppose that point coding is that the load of 0010 initial signalling point is that point coding is the twice of 0001,0011 initial signalling point, can select first calculating that participates in virtual SLS sign so, because have any different at the first site

sign indicating number

0010 and 0001,0011; Suppose that point coding is that the load of 0001 initial signalling point is that point coding is the twice of 0010,0011 initial signalling point, can select second calculating that participates in virtual SLS sign so, because have any different, can farthest reach the equiblibrium mass distribution of link load like this at the second site

sign indicating number

0001 and 0010,0011.

Step 402:, calculate this message corresponding virtual SLS sign according to the link group expansion routing parameter of pre-configured STP and OPC sign indicating number and the SLS sign that arrives this STP message;

The concrete computational methods of the virtual SLS sign of message are: according to the link group expansion routing parameter of pre-configured STP, the bit that the virtual SLS sign that does not participate in this message in the SLS of the message sign is calculated is removed, with the bit of remaining bit low level as the virtual SLS sign of this message; Link group expansion routing parameter according to pre-configured STP, choose the bit of the bit that the virtual SLS sign that participates in this message in the OPC sign indicating number of this message calculates, as the high position of the virtual SLS sign of this message, this moment, the virtual SLS sign of this message generated.For example, the link group expansion routing parameter of some STP is 00010001, the initial signaling point code that STP receives message is 0001, SLS is designated 0001, so, low four " 0001 " according to link group expansion routing parameter " 00010001 ", first " 1 " of SLS sign does not participate in calculating, the low level of back remaining " 000 " as the virtual SLS sign of this message removed from the SLS sign in this position, high four " 0001 " according to link group expansion routing parameter " 00010001 ", choose first " 1 " of initial signaling point code low high position as the virtual SLS sign of this message, so the virtual SLS that calculates this message that generates at last is designated 1000.

Because it is identical need to guarantee not participate in the SLS sign of message to participate in the initial signaling point code of figure place that the virtual SLS sign of this message calculates and message the figure place of virtual SLS sign calculating of this message, in low 4 of the link group expansion routing parameter several " 1 " are arranged, just need several " 1 " in then high 4.

In this step, remove in the SLS of the message sign and do not participate in remaining bit behind the bit that the virtual SLS sign of this message calculates, can be any way with the compound mode that participates in the bit that the virtual SLS sign of this message calculates in the OPC sign indicating number of message.

Step 403:STP selects this message of link bearer according to the virtual SLS sign of message;

Here, STP selects this message of link bearer according to message corresponding virtual SLS sign, and virtual SLS identifies identical message bearing on same link, and virtual SLS identifies different message bearings on different links.

With specific embodiment this method is described below:

Embodiment one:

Referring to Fig. 5 A, the OPC sign indicating number of initial signalling point SP1 is 0000, the OPC sign indicating number of SP2 is 0001, SP1 and SP2 transmit the message that SLS is designated even number by STP1, the message that SLS is designated odd number is transmitted by STP2, link group between STP1 and STP2 and the destination signaling point disposes 16 links, at this moment, the species number that STP1 and STP2 receive the SLS sign of message is 8 kinds, less than the number of links 16 that can select, the virtual SLS that the method that SLS identifies and OPC binds that can use the embodiment of the invention provides is calculated the message that arrives STP1 and STP2 identifies, and identifies this message of selection link bearer according to the virtual SLS of message, and the specific implementation method is as follows:

The link group expansion routing parameter of configuration stp 1 and STP2.The SLS sign that STP1 receives message is respectively 0000,0010,0100,0110,1000,1010,1100,1110, as can be seen, wherein first of each SLS sign is " 0 ", then can be set to 0001 to low 4 of the link group of STP1 expansion routing parameter; The SLS sign that STP2 receives message is respectively 0001,0011,0101,0111,1001,1011,1101,1111, and wherein first of each SLS sign is " 1 ", then can be set to 0001 to low 4 of the link group of STP2 expansion routing parameter; The signaling point code of SP1 and SP2 is respectively 0000 and 0001, and primary numerical value difference then can be set to 0001 to high 4 of the link group of STP1 and STP2 expansion routing parameter.So, the link group of STP1 and STP2 expansion routing parameter is 00010001.

On STP1, link group expansion routing parameter 00010001 according to STP1, calculate that SP1 sends, promptly the OPC sign indicating number is 0000, the SLS sign is respectively 0000,0010,0100,0110,1000,1010,1100,1110 message corresponding virtual SLS sign and is respectively: 0000,0001,0010,0011,0100,0101,0110,0111; Calculate that SP2 sends, promptly the OPC sign indicating number is 0001, the SLS sign is respectively 0000,0010,0100,0110,1000,1010,1100,1110 message corresponding virtual SLS sign and is respectively: 1000,1001,1010,1011,1100,1101,1110,1111.

On STP2, link group expansion routing parameter 00010001 according to STP2, calculate that SP1 sends, promptly the OPC sign indicating number is 0000, the SLS sign is respectively 0001,0011,0101,0111,1001,1011,1101,1111 message corresponding virtual SLS sign and is respectively: 0000,0001,0010,0011,0100,0101,0110,0111; Calculate that SP2 sends, promptly the OPC sign indicating number is 0001, the SLS sign is respectively 0001,0011,0101,0111,1001,1011,1101,1111 message corresponding virtual SLS sign and is respectively: 1000,1001,1010,1011,1100,1101,1110,1111.

As seen, STP1 is identical with the number of links that can select with the species number that STP2 receives message corresponding virtual SLS sign, is 16, shown in Fig. 5 B.Can be according to the virtual SLS sign of each message, according to the identical message bearing of virtual SLS sign on same link, the principle of message bearing on different links that virtual SLS sign is different, select link for every message and carry this message, like this, 16 links of link group all obtain utilizing, and the equilibrium that has reached link load is shared.

Embodiment two:

Referring to Fig. 6 A, the OPC sign indicating number of initial signalling point SP1 is 0000, the OPC sign indicating number of SP2 is 0001, the OPC sign indicating number of SP3 is 0010, the OPC sign indicating number of SP4 is 0011, SP1 and SP3 transmit the message that SLS is designated 0000-0111 by STP1, the message that SLS is designated 1000-1111 is transmitted by STP2, SP2 and SP4 transmit the message that SLS is designated 1000-1111 by STP1, the message that SLS is designated 0000-0111 is transmitted by STP2, STP1 and STP2 transmit the message that SLS is designated 0000-0011 by STP3, the message that SLS is designated 0100-0111 is transmitted by STP4, the message that SLS is designated 0100-1011 is transmitted by STP5, the message that SLS is designated 1100-1111 is transmitted by STP6, STP3, STP4, link group between STP5 and STP6 and STP7 and the STP8 disposes 16 links, at this moment, STP3, STP4, the species number that STP5 and STP6 can receive the SLS sign of message is 4, less than the number of links 16 that can select, the SLS sign that can use the embodiment of the invention provides is calculated with the method for OPC binding and is arrived STP3, STP4, the virtual SLS sign of the message of STP5 and STP6, and select this message of link bearer according to the virtual SLS sign of message, the specific implementation method is as follows:

The link group expansion routing parameter of configuration stp 3, STP4, STP5 and STP6.The SLS sign that STP3 receives message is respectively 0000,0001,0010,0011, and as can be seen, wherein the 3rd and the 4th of each SLS sign is " 00 ", then can be set to 1100 to low 4 of the link group of STP3 expansion routing parameter; The SLS sign that STP4 receives message is respectively 0100,0101,0110,0111, and wherein the 3rd and the 4th of each SLS sign is " 01 ", then can be set to 1100 to low 4 of the link group of STP4 expansion routing parameter; The SLS sign that STP5 receives message is respectively 1000,1001,1010,1011, and wherein the 3rd and the 4th of each SLS sign is " 10 ", then can be set to 1100 to low 4 of the link group of STP5 expansion routing parameter; The SLS sign that STP6 can receive message is respectively 1100,1101,1110,1111, and wherein the 3rd and the 4th of each SLS sign is " 11 ", then can be set to 1100 to low 4 of the link group of STP6 expansion routing parameter; The OPC sign indicating number of STP3, STP4, STP5 and STP6 be respectively 0000,0001,0010,0011, the first different with deputy numerical value, then can be set to 0011 to high 4 of the link group of STP3, STP4, STP5 and STP6 expansion routing parameter.So, the link group of STP3, STP4, STP5 and STP6 expansion routing parameter is 00111100.

Referring to Fig. 6 B, on STP3, according to the link group of STP3 expansion routing parameter 00111100, calculate that SP1 sends, promptly the OPC sign indicating number is 0000, the SLS sign is respectively 0000,0001,0010,0011 message corresponding virtual SLS sign and is respectively: 0000,0001,0010,0011; Calculate that SP2 sends, promptly the OPC sign indicating number is 0001, the SLS sign is respectively 0000,0001,0010,0011 message corresponding virtual SLS sign and is respectively 0100,0101,0110,0111; Calculate that SP3 sends, promptly the OPC sign indicating number is 0010, the SLS sign is respectively 0000,0001,0010,0011 message corresponding virtual SLS sign and is respectively 1000,1001,1010,1011; Calculate that SP4 sends, promptly the OPC sign indicating number is 0011, the SLS sign is respectively 0000,0001,0010,0011 message corresponding virtual SLS sign and is respectively 1100,1101,1110,1111.

Equally, referring to Fig. 6 C, on STP4, according to the link group expansion routing parameter 00010001 of STP4, calculate that SP1 sends, promptly the OPC sign indicating number is 0000, the SLS sign is respectively 0100,0101,0110,0111 message corresponding virtual SLS sign and is respectively: 0000,0001,0010,0011; Calculate that SP2 sends, promptly the OPC sign indicating number is 0001, the SLS sign is respectively 0100,0101,0110,0111 message corresponding virtual SLS sign and is respectively: 0100,0101,0110,0111; Calculate that SP3 sends, promptly the OPC sign indicating number is 0010, the SLS sign is respectively 0100,0101,0110,0111 message corresponding virtual SLS sign and is respectively: 1000,1001,1010,1011; Calculate that SP4 sends, promptly the OPC sign indicating number is 0011, the SLS sign is respectively 0100,0101,0110,0111 message corresponding virtual SLS sign and is respectively: 1100,1101,1110,1111.

Referring to Fig. 6 D, on STP5, according to the link group of STP5 expansion routing parameter 00010001, calculate that SP1 sends, promptly the OPC sign indicating number is 0000, the SLS sign is respectively 1000,1001,1010,1011 message corresponding virtual SLS sign and is respectively: 0000,0001,0010,0011; Calculate that SP2 sends, promptly the OPC sign indicating number is 0001, the SLS sign is respectively 1000,1001,1010,1011 message corresponding virtual SLS sign and is respectively: 0100,0101,0110,0111; Calculate that SP3 sends, promptly the OPC sign indicating number is 0010, the SLS sign is respectively 1000,1001,1010,1011 message corresponding virtual SLS sign and is respectively: 1000,1001,1010,1011; Calculate that SP4 sends, promptly the OPC sign indicating number is 0011, the SLS sign is respectively 1000,1001,1010,1011 message corresponding virtual SLS sign and is respectively: 1100,1101,1110,1111.

Referring to Fig. 6 E, on STP6, according to the link group of STP6 expansion routing parameter 00010001, calculate that SP1 sends, promptly the OPC sign indicating number is 0000, the SLS sign is respectively 1100,1101,1110,1111 message corresponding virtual SLS sign and is respectively: 0000,0001,0010,0011; Calculate that SP2 sends, promptly the OPC sign indicating number is 0001, the SLS sign is respectively 1100,1101,1110,1111 message corresponding virtual SLS sign and is respectively: 0100,0101,0110,0111; Calculate that SP3 sends, promptly the OPC sign indicating number is 0010, the SLS sign is respectively 1100,1101,1110,1111 message corresponding virtual SLS sign and is respectively: 1000,1001,1010,1011; Calculate that SP4 sends, promptly the OPC sign indicating number is 0011, the SLS sign is respectively 1100,1101,1110,1111 message corresponding virtual SLS sign and is respectively: 1100,1101,1110,1111.

As seen, the species number that STP3, STP4, STP5 and STP6 receive message corresponding virtual SLS sign is identical with the number of links that can select, be 16, can be according to the virtual SLS sign of each message, according to the identical message bearing of virtual SLS sign on same link, the principle of message bearing on different links that virtual SLS sign is different, select link for every message and carry this message, like this, 16 links of link group all obtain utilizing, and the equilibrium that has reached link load is shared.

When distinctive mark is caller overall situation translation (GT) sign indicating number, the embodiment of the invention also provides a kind of message signaling link to select (SLS) sign and the binding of caller overall situation translation (GT) sign indicating number to select the method for message bearing link, the GT sign indicating number is the field of one of SCCP layer indication address, and so-called caller GT sign indicating number is exactly to be used for the field of identification message sender address.In this method, the link that Signalling Transfer Point STP selects this message of carrying according to the SLS sign and the caller GT sign indicating number of message carries the message that comprises identical SLS sign, different caller GT sign indicating numbers at least two links of link group.

Concrete, when STP transmits message,,, obtaining this message corresponding virtual SLS sign according to sign of the SLS in the message and caller GT sign indicating number at its each message that receives, the message bearing that corresponding different virtual SLS is identified is on the different link of link group then.

Here, according to sign of the SLS in the message and caller GT sign indicating number, the specific implementation method that obtains this message corresponding virtual SLS sign is:

STP receives that identical bit is set to remove bit in each SLS sign of message, and this STP receives in each caller GT sign indicating number of message and exists the bit of difference to be set to add bit; Receive in the SLS sign of message in each of STP, will remove the bit of bit and remove, and add in the caller GT sign indicating number of this message, constitute this message corresponding virtual SLS sign at the bit that adds bit.

During specific implementation, can also link expansion routing parameter be set at STP, this parameter is used for identifying set removal bit and adds bit, then when the virtual SLS that calculates message identifies, can will remove at the bit of removing bit in the SLS sign of message according to set link expansion routing parameter, choose in the caller GT sign indicating number of this message at the bit that adds bit, add in the SLS sign of carrying out after bit is removed, generate this message corresponding virtual SLS sign.

Referring to Fig. 7, the specific implementation step of this method can be as follows:

Step 701: at STP configuration link group expansion routing parameter;

The equipping rules of this link group expansion routing parameter is: which bit in low 4 SLS signs that are used for representing message of link group expansion routing parameter does not participate in the calculating of the virtual SLS sign of this message, is called the removal bit with not participating in the bit that the virtual SLS sign of this message calculates; Which the highest 4 bit participates in the calculating of the virtual SLS sign of this message among high 4 caller GT that are used for representing message of link group expansion routing parameter, is called the interpolation bit with participating in the bit that the virtual SLS sign of this message calculates.

When which bit did not participate in the calculating of virtual SLS sign of this message in determining the SLS sign of message, the principle of being followed was: STP receives the bit that virtual SLS sign that all the same bit of numerical value in all SLS signs of message is set to not participate in this message is calculated.

When which bit in determining the caller GT of message in the highest 4 participated in the calculating of virtual SLS sign of this message, the principle of being followed was: STP receives among all caller GT of message the bit of calculating that the differentiated bit of numerical value in the highest 4 is set to participate in the virtual SLS sign of this message.

Step 702:, calculate this message corresponding virtual SLS sign according to the link group expansion routing parameter of pre-configured STP and caller GT sign indicating number and the SLS sign that arrives this STP message;

The concrete computational methods of the virtual SLS sign of message are: according to the link group expansion routing parameter of pre-configured STP, the bit that the virtual SLS sign that does not participate in this message in the SLS of the message sign is calculated is removed, with the bit of remaining bit low level as the virtual SLS sign of this message; Link group expansion routing parameter according to pre-configured STP, choose the bit of the bit that the virtual SLS sign that participates in this message in the highest 4 of the caller GT sign indicating number of this message calculates, as the high position of the virtual SLS sign of this message, this moment, the virtual SLS sign of this message generated.

Because it is identical need to guarantee not participate in the SLS sign of message to participate in the highest 4 of the caller GT sign indicating number of bit number that the virtual SLS sign of this message calculates and message the bit number of virtual SLS sign calculating of this message, in low 4 of link group expansion routing parameter, several " 1 " are arranged, just need several " 1 " in then high 4.

Step 703:STP selects this message of link bearer according to the virtual SLS sign of message;

Below in conjunction with specific embodiment this method is described:

Embodiment three:

Still referring to Fig. 5 A, the high 4bit of GT sign indicating number of the message that initial signalling point SP1 sends is 0001, the high 4bit of GT sign indicating number of the message that SP2 sends is 0010, SP1 and SP2 transmit the message that SLS is designated even number by STP1, the message that SLS is designated odd number is transmitted by STP2, link group between STP1 and STP2 and the destination signaling point disposes 16 links, at this moment, the species number that STP1 and STP2 receive the SLS sign of message is 8 kinds, less than the number of links 16 that can select, the virtual SLS that the method that SLS identifies and message GT sign indicating number is bound that can use the embodiment of the invention provides is calculated the message that arrives STP1 and STP2 identifies, and select this message of link bearer according to the virtual SLS sign of message, the specific implementation method is as follows:

The link group expansion routing parameter of configuration stp 1 and STP2.The SLS sign that STP1 receives message is respectively 0000,0010,0100,0110,1000,1010,1100,1110, as can be seen, wherein first of each SLS sign is " 0 ", then can be set to 0001 to low 4 of the link group of STP1 expansion routing parameter; The SLS sign that STP2 receives message is respectively 0001,0011,0101,0111,1001,1011,1101,1111, and wherein first of each SLS sign is " 1 ", then can be set to 0001 to low 4 of the link group of STP2 expansion routing parameter; The high 4bit of message GT sign indicating number that SP1 and SP2 send is respectively 0001 and 0010, the first or deputy numerical value difference, then can be set to 0001 or 0010 to high 4 of the link group of STP1 and STP2 expansion routing parameter.So, the link group of STP1 and STP2 expansion routing parameter is 00010001 or 00100001.

On STP1, according to the link group of STP1 expansion routing parameter 00010001, calculate that SP1 sends, the high 4bit of message GT sign indicating number and be 0001, the SLS sign is respectively 0000,0010,0100,0110,1000,1010,1100,1110 message corresponding virtual SLS sign and is respectively: 1000,1001,1010,1011,1100,1101,1110,1111; Calculate that SP2 sends, the high 4bit of message GT sign indicating number and be 0010, the SLS sign is respectively 0000,0010,0100,0110,1000,1010,1100,1110 message corresponding virtual SLS sign and is respectively: 0000,0001,0010,0011,0100,0101,0110,0111.

On STP2, according to the link group of STP2 expansion routing parameter 00010001, calculate that SP1 sends, the high 4bit of message GT sign indicating number and be 0001, the SLS sign is respectively 0001,0011,0101,0111,1001,1011,1101,1111 message corresponding virtual SLS sign and is respectively: 1000,1001,1010,1011,1100,1101,1110,1111; Calculate that SP2 sends, the high 4bit of message GT sign indicating number and be 0010, the SLS sign is respectively 0001,0011,0101,0111,1001,1011,1101,1111 message corresponding virtual SLS sign and is respectively: 0000,0001,0010,0011,0100,0101,0110,0111.

So STP1 is identical with the number of links that can select with the species number that STP2 receives message corresponding virtual SLS sign, is 16, as shown in Figure 8.Can be according to the virtual SLS sign of each message, according to the identical message bearing of virtual SLS sign on same link, the principle of message bearing on different links that virtual SLS sign is different, select link for every message and carry this message, like this, 16 links of link group all obtain utilizing, and the equilibrium that has reached link load is shared.

As seen, caller GT sign indicating number can substitute the OPC sign indicating number of MTP layer fully and realize " virtual SLS ", and the status of the two is identical in this process, and the method for calculating virtual SLS is also roughly the same.When the OPC sign indicating number is not enough to embody the true promoter of message, such as, message is after the STP that has the SCCP function through some transmits, if carried out the translation of GT sign indicating number, OPC sign indicating number in the message can be made amendment, the method that can use this moment message caller GT sign indicating number and the binding of SLS sign to generate virtual SLS realizes the equilibrium burden of link load.

At Fig. 6 A, when using the load balancing on method realization STP3, STP4, STP5 and the STP6 that SLS identifies and caller GT binds, the method and the embodiment two that calculate the virtual SLS sign of each message are roughly the same, repeat no more here.

The SLS sign that the embodiment of the invention provides is with the method for OPC binding and SLS identifies and the method for caller GT binding, the species number of SLS sign that can transmit message at STP is during less than the number of links that can select, by " virtual SLS " increase the species number of SLS sign, make full use of link, thereby make the distribution of link load balanced more, when OPC or GT are abundant, the virtual SLS sign that generates is equal to or greater than the number of links that can select, and can reach the complete equiblibrium mass distribution of link load this moment.But adopt these two kinds of methods to meet the following conditions:

The kind of SLS sign distributes and needs certain rules, can find the identical number of bits of numerical value during all SLS that make STP transmit message identify, thereby can determine in view of the above which bit in the SLS sign does not participate in the calculating of virtual SLS.

Simultaneously, the number of the initial signalling point that links to each other with STP is at least two.In addition, make link load reach complete equilibrium, even the species number of the last virtual SLS sign that generates of STP is equal to or greater than the number of links that can select, the number of the initial signalling point that links to each other with STP also will satisfy the value that is equal to or greater than the species number that the number of links that can select identifies divided by SLS.Certainly, also need to satisfy and to find the identical number of bits of numerical value to be the number of links that to select value in all SLS signs that STP transmits message divided by the species number of SLS sign, turn to the exponential quantity behind 2 the power power, such as, the number of links that can select is 16, the species number of SLS sign is 4,16 to be to be 2 behind 2 the power power divided by 4 value ², so, need in STP transmits all SLS sign of message, can find the identical bit of 2 bit value.

When distinctive mark is messaging service indication (SI) sign, the embodiment of the invention also provides a kind of message signaling link to select (SLS) sign and the binding of messaging service indication (SI) sign to select the method for message bearing link, SI is a field in the Message Signal Unit (MSU), be made of 4 bit, its implication as shown in Figure 9.In this method, after Signalling Transfer Point STP received the message that comprises SLS sign and SI sign, the message bearing that will comprise identical SLS sign, different SI sign was at least two links of link group.

Specifically, when STP transmits message,,, obtaining this message corresponding virtual SLS sign according to sign of the SLS in the message and SI sign at its each message that receives, the message bearing that corresponding different virtual SLS is identified is on the different link of link group then.

Here, according to sign of the SLS in the message and SI sign, the specific implementation method that obtains this message corresponding virtual SLS sign is, and: STP receives that identical bit is set to remove bit in each SLS sign of message, STP receives in each SI sign of message and exists the bit of difference to be set to add bit, when the virtual SLS that calculates STP reception message identifies, in the SLS of this message sign, the bit of removing bit is removed, and add in the SI sign of this message at the bit that adds bit, constitute this message corresponding virtual SLS sign, need to guarantee to remove bit equally and equate with the bit number of described interpolation bit.

Certainly, also can set in advance link expansion routing parameter in this method at STP, this parameter is used for identifying set removal bit and adds bit, when the virtual SLS that calculates message identifies, according to this link expansion routing parameter, choosing the removal bit in the SLS of message sign also removes the bit of this bit, in the SI of message sign, choose the interpolation bit, and the bit of this bit added in the SLS sign of carrying out after bit is removed, generate this message corresponding virtual SLS sign.

Above-mentioned be provided with add bit concrete grammar can for: each SI sign that STP is received message is divided at least two groups, and there is bit, at this bit, the bit that SI in each grouping is identified at this bit is identical, there is difference in the bit that the SI of each grouping is identified at this bit, then can be set to add bit by this bit.

In order to realize the complete equilibrium of link load, the link that is the link group configuration all obtains utilizing, set removal bit with the bit number that adds bit is: the commerce-change of species number that the number of links of link group configuration and STP receive the SLS sign of message is the index behind 2 the power power, and then above-mentioned packet count according to message SI identification packet is the merchant of the species number that identifies of the SLS of number of links and the STP reception message of link group configuration.

In addition, can be above-mentioned equal according to the corresponding size of message of each grouping after the message SI identification packet by making, make the link that is utilized farthest reach the message load equilibrium, wherein the corresponding size of message of grouping identifies the summation of corresponding message count for each SI in this grouping.

The present invention will be described with specific embodiment below:

Embodiment four:

Referring to Figure 10,1 Original Signaling Point SP1 is arranged among the figure, SP1 transmits the message that SLS is designated 0000-0111 by STP1, the message that SLS is designated 1000-1111 is transmitted by STP2, STP1, link group between STP2 and the destination signaling point SP2 disposes 16 links, STP1, the species number of the SLS sign of STP2 forwarding message is less than the number of links that can select, at this moment, owing to only there is an Original Signaling Point, can't adopt the SLS sign and the method for OPC binding or SLS sign and caller GT binding to realize the link load equilibrium, can use the SLS sign and the method for message SI sign binding to realize the equiblibrium mass distribution of link load, the specific implementation method is as follows:

Suppose to have a kind of like this rule: in the message from SP1 to SP2, message (SI＜4) amount of the size of message of the message of User Part (SI＞=4 comprise Telephone User Part, ISUP, digital subscriber part) and user's control, test, management is much the same.Then SI can be designated be divided into one group of 0000-0011, SI is designated another group that is divided into of 0100-0111, and the 3rd of the SI sign all is in first group " 0 ", the 3rd of the SI sign all be in second group " 1 ", at this moment can STP1 and " link expansion routing " parameter of STP2 be set to 01001000.

On STP1, according to link group expansion routing parameter 01001000, calculate SI and be designated 0000-0011, SLS sign and be respectively 0000,0001,0010,0011,0100,0101,0110,0111 message corresponding virtual SLS sign and be respectively: 0000,0001,0010,0011,0100,0101,0110,0111; Calculating SI is designated 0100-0111, SLS sign and is respectively 0000,0001,0010,0011,0100,0101,0110,0111 message corresponding virtual SLS sign and is respectively: 1000,1001,1010,1011,1100,1101,1110,1111.

On STP2, according to link group expansion routing parameter 01001000, calculate SI and be designated 0000-0011, SLS sign and be respectively 1000,1001,1010,1011,1100,1101,1110,1111 message corresponding virtual SLS sign and be respectively: 0000,0001,0010,0011,0100,0101,0110,0111; Calculating SI is designated 0100-0111, SLS sign and is respectively 1000,1001,1010,1011,1100,1101,1110,1111 message corresponding virtual SLS sign and is respectively 1000,1001,1010,1011,1100,1101,1110,1111.

As seen, STP1 is identical with the number of links that can select with the species number that STP2 receives message corresponding virtual SLS sign, is 16, as shown in figure 11.Can be according to the virtual SLS sign of each message, according to the identical message bearing of virtual SLS sign on same link, the principle of message bearing on different links that virtual SLS sign is different, select link for every message and carry this message, like this, 16 links of link group all obtain utilizing, and the equilibrium that has reached link load is shared.

Among the present invention, the message that STP receives can be the broadband message from the broadband connection group, also can be the arrowband message from the narrow band link group.

Referring to Figure 12, the embodiment of the invention provides a kind of Signalling Transfer Point, and this Signalling Transfer Point comprises receiving element 1201, routing unit 1202 and load bearing unit 1203, wherein, receiving element 1201 is used to receive the message that comprises signaling link selection SLS sign and distinguishing identifier; Routing unit 1202 is used for after receiving element receives described message, according to sign of the SLS in the message and distinguishing identifier, selects at least two links for the message that comprises identical SLS sign, different distinguishing identifier in link group; Load bearing unit 1203 is used to utilize the described message of selected at least two link bearer in routing unit.

Described distinguishing identifier comprises initial signaling point code OPC, or caller overall situation translation GT sign indicating number, or professional indication SI sign.

Routing unit 1202 comprises virtual identifying computing unit 12021 and link selection unit 12022, wherein, virtual identifying computing unit 12021, each message that is used for receiving at receiving element, according to sign of the SLS in the message and distinguishing identifier, obtain this message corresponding virtual SLS sign; Link selection unit 12022 is used for the virtual SLS sign of the message that calculates according to the virtual identifying computing unit, be the different link of message selection of corresponding different virtual SLS sign in link group.

Virtual identifying computing unit 12021 comprises unit 120211 and computing unit 120212 is set, wherein, unit 120211 is set, the identical bit of each SLS sign that is used for described receiving element reception message is set to remove bit, exists the bit of difference to be set to add bit in each distinguishing identifier of described receiving element reception message; Computing unit 120212, each that is used for receiving at described receiving element receives the SLS sign of message, the bit of described removal bit is removed, and added in the distinguishing identifier of this message, constitute this message corresponding virtual SLS sign at the bit of described interpolation bit.

Virtual identifying computing unit 12021 further comprises parameter configuration unit 120213, be used to be provided with link expansion routing parameter, this parameter is used for identifying described removal bit and described interpolation bit, then computing unit 120212 is used for: expand the routing parameter according to the link that parameter configuration unit is provided with, choosing described removal bit in the SLS of message sign also removes the bit of this bit, in the distinguishing identifier of described message, choose described interpolation bit, and the bit of this bit added in the described SLS sign of carrying out after bit is removed, generate described message corresponding virtual SLS sign.

Unit 120211 is set comprises removal unit 1202111 and adding device 1202112, wherein, remove unit 1202111, the identical bit of each SLS sign that is used for described receiving element reception message is set to remove bit; Adding device 1202112, each distinguishing identifier that is used for described receiving element reception message exists the bit of difference to be set to add bit.

When described distinguishing identifier is the SI sign, adding device 120211 is used for: each SI sign that described receiving element is received message is divided at least two groups, and there is bit, at this bit, the bit that SI in each grouping is identified at this bit is identical, there is difference in the bit that the SI of each grouping is identified at this bit, and this bit is set to add bit.

The removal bit that unit 120211 settings are set is identical with the bit number that adds bit.

Unit 120211 removal bit that is provided with and the bit number that adds bit are set is: the commerce-change that the number of links of described link group configuration and described STP receive the species number that the SLS of message identifies is the index behind 2 the power power.

When described distinguishing identifier is the SI sign, and the bit number of removing bit and described interpolation bit is that the commerce-change of the species number that identifies of the SLS of number of links and the described STP reception message of described link group configuration is when being index behind 2 the power power, adding device 120211 is used for: each SI sign that described receiving element is received message is divided into groups, and packet count is the merchant of the species number of the number of links of described link group configuration and the SLS sign that described receiving element receives message.

Adding device 120211 is used for: each SI sign that described receiving element is received message is divided at least two groups, and the size of message of each grouping correspondence is equal, and the corresponding size of message of grouping identifies the summation of corresponding message count for interior each SI of this grouping.

The application of the Signalling Transfer Point that the embodiment of the invention is provided with specific embodiment describes below:

Still referring to Fig. 5 A, the OPC sign indicating number of initial signalling point SP1 is 0000, the OPC sign indicating number of SP2 is 0001, SP1 and SP2 transmit the message that SLS is designated even number by STP1, the message that SLS is designated odd number is transmitted by STP2, and the link group between STP1 and STP2 and the destination signaling point disposes 16 links.In the present embodiment, the method for signal switching point selection message bearing link as shown in figure 12 is as follows:

The receiving element of Signalling Transfer Point STP1 receive from SP1 be that the OPC sign indicating number is 0000, the SLS sign is respectively 0000,0010,0100,0110,1000,1010,1100,1110 message, and from SP2 be that the OPC sign indicating number is 0001, the SLS sign is respectively 0000,0010,0100,0110,1000,1010,1100,1110 message; Each message that virtual identifying computing unit in the routing unit receives at receiving element according to sign of the SLS in the message and OPC sign indicating number, obtains this message corresponding virtual SLS sign; The virtual SLS sign of the message that the link selection unit in the routing unit calculates according to the virtual identifying computing unit again be the different link of message selection of corresponding different virtual SLS sign in link group.

Above-mentioned virtual identifying computing unit calculates the virtual SLS sign of message and is specifically finished by self-contained unit, parameter configuration unit and the computing unit of being provided with:

At first, be provided with that identical bit is set to remove bit in each SLS sign that the unit receiving element receives message, receiving element receives in each OPC sign indicating number of message and exists the bit of difference to be set to add bit, as can be seen, first of each SLS sign of receiving element reception message is " 0 ", first bit that removal unit SLS sign in the unit then is set is set to remove bit, the OPC sign indicating number of SP1 and SP2 is respectively 0000 and 0001, primary numerical value difference, first bit that the adding device OPC sign indicating number in the unit then is set is set to add bit;

Then, parameter configuration unit is provided with link expansion routing parameter, this parameter is used for identifying set removal bit and adds bit, because being set, first bit of unit SLS sign is set to remove bit, first bit of OPC sign indicating number is set to add bit, and then this moment link being expanded the routing parameter configuration is 00010001;

Next, the link expansion routing parameter 00010001 that computing unit is provided with according to parameter configuration unit, in the SLS of message sign, the bit of first bit is removed, bit at first bit in the OPC sign indicating number of this message is added in the SLS sign of having removed first bit, generate this message corresponding virtual SLS sign, result of calculation is: the OPC sign indicating number is 0000, the SLS sign is respectively 0000,0010,0100,0110,1000,1010,1100,1110 message corresponding virtual SLS sign is respectively: 0000,0001,0010,0011,0100,0101,0110,0111; The OPC sign indicating number is 0001, the SLS sign is respectively 0000,0010,0100,0110,1000,1010,1100,1110 message corresponding virtual SLS sign and is respectively: 1000,1001,101 0,1011,1100,1101,1110,1111.

At last, the virtual SLS sign of the message that the link selection unit calculates according to the virtual identifying computing unit again be the different link of message selection of corresponding different virtual SLS sign in link group.Because the virtual identifying computing unit calculates 16 kinds of different virtual SLS signs, link group between STP1 and the SP3 disposes 16 links, the link selection unit can be respectively these the 16 kinds corresponding message of virtual SLS sign and respectively select a link, the link selected for each message according to the routing unit of load bearing unit comes bearer messages then, and this moment, the link of link group was fully used.

Equally, STP2 selects the method for message bearing link with above-mentioned STP1.Caller GT sign indicating number is substituted OPC, and the method that STP1 or STP2 select message bearing link according to the SLS sign and the caller GT sign indicating number of message selects the method for message bearing link identical with above-mentioned SLS sign and OPC sign indicating number according to message, repeats no more here.

STP1 or STP2 can also identify according to the SLS of message sign and message SI and select message bearing link, suppose that the SI of reception message is designated 0000-0111, and SI to be designated the size of message of 0000-0011 identical with the size of message that SI is designated 0100-0111.The adding device of STP1 or STP2 is when being provided with the interpolation bit, SI is designated be divided into one group of 0000-0011, SI is designated be divided into one group of 0100-0111, as seen the 3rd of first group of interior SI sign all is " 0 ", the 3rd of the SI sign all be in second group " 1 ", the 3rd bit that can SI identify this moment is set to add bit.The method of the calculating of the virtual SLS sign of follow-up message and selection link bearer message selects the method for message bearing link identical according to the SLS sign of message with the OPC sign indicating number with above-mentioned STI1.

To sum up, the present invention has following technique effect:

After STP receives the message that comprises SLS sign, OPC and SI sign among the present invention, message bearing by will comprising identical SLS sign, different OPC is at least two links of link group, perhaps, to comprise the message bearing of identical SLS sign, different GT codes at least two links of link group, perhaps, to comprise the message bearing of identical SLS sign, different SI sign at least two links of link group, the link that has utilized more fully link group to dispose, thus so that link load sharing is more balanced. And when meeting the following conditions: when the set removal bit of STP and the bit number that adds bit are index after the commerce-change of the species number that identifies of the SLS of number of links and the described STP receipt message of link group configuration is 2 power side, the link of link group configuration can all utilize, and realizes the complete equilibrium of link load. When STP receipt message during from the broadband connection group, the link of the present invention by utilizing more fully link group to dispose, message sharing on narrow band link in broadband is more balanced, can reduce the impact that broadband message causes narrow band link.

Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention. Like this, if of the present invention these are revised and modification belongs to the range of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.

Claims

1. a Signalling Transfer Point is characterized in that, this Signalling Transfer Point comprises:

2. Signalling Transfer Point as claimed in claim 1 is characterized in that, described distinguishing identifier is initial signaling point code OPC, or caller overall situation translation GT sign indicating number, or professional indication SI sign.

3. Signalling Transfer Point as claimed in claim 1 is characterized in that, described virtual identifying computing unit comprises:

The unit is set, and the identical bit of each SLS sign that is used for described receiving element reception message is set to remove bit, exists the bit of difference to be set to add bit in each distinguishing identifier of described receiving element reception message;

Computing unit, each that is used for receiving at described receiving element receives the SLS sign of message, the bit of described removal bit is removed, and added in the distinguishing identifier of this message, constitute this message corresponding virtual SLS sign at the bit of described interpolation bit.

4. Signalling Transfer Point as claimed in claim 3 is characterized in that, described virtual identifying computing unit further comprises:

Parameter configuration unit is used to be provided with link expansion routing parameter, and this parameter is used for identifying described removal bit and described interpolation bit, and then described computing unit is used for:

Expand the routing parameter according to the link that parameter configuration unit is provided with, choosing described removal bit in the SLS of message sign also removes the bit of this bit, in the distinguishing identifier of described message, choose described interpolation bit, and the bit of this bit added in the described SLS sign of carrying out after bit is removed, generate described message corresponding virtual SLS sign.

5. Signalling Transfer Point as claimed in claim 3 is characterized in that, the described unit that is provided with comprises:

Remove the unit, the identical bit of each SLS sign that is used for described receiving element reception message is set to remove bit;

Adding device, each distinguishing identifier that is used for described receiving element reception message exists the bit of difference to be set to add bit.

6. Signalling Transfer Point as claimed in claim 5 is characterized in that, described adding device is used for:

When described distinguishing identifier is the SI sign, each SI sign that described receiving element is received message is divided at least two groups, and there is bit, at this bit, the bit that SI in each grouping is identified at this bit is identical, there is difference in the bit that the SI of each grouping is identified at this bit, and this bit is set to add bit.

7. Signalling Transfer Point as claimed in claim 3 is characterized in that, described that the removal bit that the unit is provided with is set is identical with the bit number of interpolation bit.

8. Signalling Transfer Point as claimed in claim 3, it is characterized in that, the described removal bit that the unit setting is set with the bit number that adds bit is: the number of links of described link group configuration receives the merchant of species number of the SLS sign of message divided by described STP, turns to the index behind 2 the power power.

9. Signalling Transfer Point as claimed in claim 6 is characterized in that, described adding device is used for:

When the bit number of described removal bit and described interpolation bit is: the number of links of described link group configuration receives the merchant of species number of the SLS sign of message divided by described STP, when turning to the index behind 2 the power power, each SI sign that described receiving element is received message is divided into groups, and packet count is the merchant of the species number of the number of links of described link group configuration and the SLS sign that described receiving element receives message.

10. Signalling Transfer Point as claimed in claim 6, it is characterized in that, described adding device is used for: each SI sign that described receiving element is received message is divided at least two groups, the corresponding size of message of each grouping equates that the size of message of grouping correspondence is the summation of the corresponding message count of each SI sign in this grouping.

11. a method of selecting message bearing link is characterized in that, this method comprises:

Reception comprises the message that signaling link is selected SLS sign and distinguishing identifier;

Utilize the described message of selected link bearer.

12. method as claimed in claim 11 is characterized in that, described distinguishing identifier comprises initial signaling point code OPC, or caller overall situation translation GT sign indicating number, or professional indication SI sign.

13. method as claimed in claim 11 is characterized in that, and is described at described each message that receives, and according to sign of the SLS in the message and distinguishing identifier, obtains this message corresponding virtual SLS sign and comprises:

A0. identical bit is set to remove bit in each SLS sign of described reception message, exists the bit of difference to be set to add bit in each distinguishing identifier of described reception message;

A1. described each receive in the SLS sign of message, the bit of described removal bit is removed, and is added in the distinguishing identifier of this message at the bit of described interpolation bit, constitute this message corresponding virtual SLS sign.

14. method as claimed in claim 13 is characterized in that, between steps A 0 and steps A 1, this method further comprises:

Link expansion routing parameter is set, and this parameter is used for identifying described removal bit and described interpolation bit, and then steps A 1 comprises:

According to described link expansion routing parameter, choosing described removal bit in the SLS of described message sign also removes the bit of this bit, in the distinguishing identifier sign indicating number of described message, choose described interpolation bit, and the bit of this bit added in the described SLS sign of carrying out after bit is removed, generate described message corresponding virtual SLS sign.

15. method as claimed in claim 13 is characterized in that, described removal bit equates with the bit number of described interpolation bit.

16. method as claimed in claim 13, it is characterized in that, the bit number of described removal bit and described interpolation bit is: the number of links of described link group configuration is divided by the merchant of the species number of the SLS sign of described reception message, turns to the index behind 2 the power power.

17. method as claimed in claim 13 is characterized in that, when described distinguishing identifier is SI when sign, exists the bit of difference to be set to add bit in the steps A 0 in each distinguishing identifier of described reception message and comprises:

A01. each SI sign with described reception message is divided at least two groups, and have bit, at this bit, the bit that the SI in each grouping is identified at this bit is identical, there is difference in the bit that the SI of each grouping is identified at this bit, and this bit is set to add bit.

18. method as claimed in claim 17, it is characterized in that, when described distinguishing identifier is the SI sign, and the bit number of described removal bit and described interpolation bit is: the number of links of described link group configuration is divided by the merchant of the species number of the SLS sign of described reception message, when turning to the index behind 2 the power power, the packet count in the steps A 01 is the merchant of the species number that identifies of the SLS of number of links and the described reception message of described link group configuration.

19. method as claimed in claim 17 is characterized in that, the corresponding size of message of described each grouping equates that the size of message of grouping correspondence is the summation of the corresponding message count of each SI sign in this grouping.