CN100531112C

CN100531112C - Implementation of ISUP signalling process with degraded transmission channel number

Info

Publication number: CN100531112C
Application number: CNB031192173A
Authority: CN
Inventors: 王武军; 李永刚; 倪勇
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2003-03-05
Filing date: 2003-03-05
Publication date: 2009-08-19
Anticipated expiration: 2023-03-05
Also published as: CN1527576A

Abstract

The implementation of ISUP signaling process with degraded transmission channel number includes the following steps. After the initiating office initiates multi-channel calling and the relay office adjacent to the destination office receives the inform of using degraded channel number from the destination office, the relay office releases excessive channels while back transmitting the inform to other relay offices; the other relay offices release excessive channels successively while back transmitting the inform to the initiating office; and the initiating office finally degrades the used channel number to that the destination office indicates for the connection to the destination office.

Description

The ISUP signaling process implementation method that the transmission channel number is degraded

Invention field

The present invention relates generally to the telephone exchange technical field, particularly a kind of ISUP signaling process implementation method that can the transmission channel number be degraded by rerouting.

Background technology

At length stipulated the signaling process that single channel degrades according to bearing capacity (TMR) in International Telecommunications Union (ITUT) standard, this flow process is to provide the bearing capacity of a preferred bearing capacity and one choosing by the bearing capacity parameter (TMR) in the initial address message (IAM), preferred bearing capacity parameter (TMRP), user service information parameter (USI) and preferred, users business information (USIP) parameter.In certain follow-up office, if can not carry preferably than advantages of high bearing capacity, the bearing capacity that is inferior choosing that just degrades continues to call out, and indicates to preceding end office (EO) by will the degrade bearing capacity of use of the bearing capacity parameter of using (TMU) in Address Complete Message (ACM) in the back.But, in this standard, preferably and the bearing capacity of time choosing all be single channel, bearing capacity be 64k preferably, not limited, the 3.1k Audio (audio frequency) of 64k and Speech (voice).

Also bearing capacity has been defined the situation of multichannel (port number is 2～30) in the ITUT standard.Under multichannel situation, the ISUP of ITUT (ISUP) signaling standard has defined parametric representation and signaling process that multichannel is called out, this standard gives the flow processs that degrades different according to bearing capacity (TMR) when single channel simultaneously, this a kind of single channel that degrades (for example degrades flow process, in common PSTN circuit calling, owing to only use a 64k passage, so can use this flow process that degrades).But, in actual networking, find, in some cases, need the port number processing that degrades promptly, be needed (for example to reduce port number, N passage reduced to N-1～1 passage, the span of N: for E1 type PCM (pulse code modulation) is 2～30; For T1 type PCM is 2～24) because can save the resource of repeat circuit so greatly.

For example, in 3G (3-G (Generation Three mobile communication system)) uses, application requirements as shown in Figure 1 might appear.Fig. 1 is multichannel transmission and the route reselection schematic diagram during conventional 3G uses.As shown in Figure 1, in 3G uses, under the normal condition, initiate a multichannel calling from A office and arrive B office 3G subscription, set up a multichannel and connect by middle 3G gateway exchange.On the other hand, if the 3G subscription of B office has been registered Call Forwarding to PSTN user, then B office will send the release message (REL) of band redirection number parameter (RedirectionNum) to middle 3G gateway exchange, and middle 3G critical point is routed to the PSTN network users again according to the number of appointment in the RedirectionNum parameter.Only need a passage owing to PSTN calls out, so just need degrade multichannel is single channel (that is, need carry out port number and degrade), to save relay circuit resources.But, in the ISUP of ITUT signaling standard, do not provide standard and signaling process that multichannel degrades.Therefore, in application, just can't utilize existing ISUP standard signaling to realize the processing that degrades of port number such as above-mentioned situation, and then can not be by saving the interoffice junction circuit to cut operating costs.In addition, because the processing that degrades need utilize the method for rerouting, but prior art does not provide the signaling process of rerouting.

Summary of the invention

Therefore, at the above-mentioned problems in the prior art, the purpose of this invention is to provide and a kind ofly can solve the multichannel ISUP signaling process implementation method that degrades and handle problems and can save the interoffice junction circuit.

In order to achieve the above object, the invention provides a kind of ISUP signaling process implementation method that the transmission channel number is degraded, this flow process may further comprise the steps: 1) initiate in the process of a multichannel calling in initiation office, initiation office will send information that contains port number and the information that the continuous situation of port number is described to its follow-up tandem office; 2) receive when using port number after degrading with indication tandem office when the tandem office adjacent from the information of target office with target office, this tandem office will discharge unnecessary passage according to described information from target office, and send the information that the port number after degrading is used in indication to other tandem offices on the initiation office direction; 3) described other tandem offices discharge its unnecessary passage according to the information that receives successively, and described indication are used the information of the port number after degrading send to initiation office direction; 4) after initiation office receives that the information of the port number after degrading is used in described indication, it will degrade according to the port number that described indication uses the information of the port number after degrading to use during described multichannel is called out for by the port number behind the degrading of target office indication, and use being connected of described port number foundation after degrading and described target office.

Above-mentioned steps 2) further may further comprise the steps in: the described tandem office adjacent with target office of target office direction sends information and carries out rerouting to indicate this tandem office, and described tandem office then carries out the rerouting operation according to this information.When described rerouting operation makes that degrading appears in the transmission channel number, port number and the target office of described tandem office after target office sends information and degrades with use connects, and described target office serves as the port number that passes through after degrading with the port number of confirming current use to described tandem office echo message then.

In addition, above-mentioned steps 1) further comprising the steps of in: what send when initiation office is a continuous multichannel of port number when calling out, and initiation office will send number of active lanes information and represent the continuous information of port number to follow-up tandem office; What send when initiation office is the discontinuous multichannel of port number when calling out, and initiation office will send number of active lanes information and represent the discontinuous information of port number to follow-up tandem office;

In step 2) described in port number and the target office when connecting of tandem office after target office sends information and degrades with use, also correspondingly include number of active lanes information in this information and represent the continuous or discrete information of port number.

In an embodiment of the present invention, what send when initiation office is the continuous multichannel of port number when calling out, by initiating the number of active lanes information that the follow-up tandem office of office direction sends and representing the continuous information of port number to be included in the initial address message (IAM) that not charged road takies table (CAM) parameter; What send when initiation office is the discontinuous multichannel of port number when calling out, by initiating the number of active lanes information that the follow-up tandem office of office direction sends and represent the discontinuous information of port number to be included in to have in the initial address message (IAM) that circuit takies table (CAM) parameter

In addition, in an embodiment of the present invention, the information of being used for of sending indicating this tandem office to carry out rerouting by the described tandem office adjacent with target office of target office direction is included in the release message (REL) of band redirection number (RedirectionNum) parameter of being sent by target office.

In addition, in an embodiment of the present invention, be included in the full address message of sending by target office (ACM) by the echo message of described target office to described tandem office.

In addition, in an embodiment of the present invention, be included in the bearing capacity parameter (TMU) of the use of the Address Complete Message (ACM) that sends by tandem office in the described information that is used for indicating the port number after use degrades that transmits between described tandem office and the initiation office.

With the prior art standard relatively, the ISUP signaling process implementation method that the application of the invention provided just can be in conjunction with rerouting realizing the processing that degrades from N passage to N-1～1 passage, thereby reach the purpose of saving interoffice junction circuit.

Description of drawings

By following detailed description and with reference to the accompanying drawings to specific embodiment, it is clear more understandable that the present invention will become, in the accompanying drawings:

Fig. 1 is multichannel transmission and the route reselection schematic diagram during conventional 3G uses;

Fig. 2 is the schematic diagram according to the described ISUP signaling process implementation method under the continuous situation of port number of the embodiment of the invention;

Fig. 3 is the schematic diagram according to the described ISUP signaling process implementation method under the discontinuous situation of port number of the embodiment of the invention;

Embodiment

Below with reference to Fig. 2 and Fig. 3 embodiments of the invention are elaborated.

Whether be divided into port number continuous degrade process and the discrete process that degrades of port number according to the described ISUP signaling process of the embodiment of the invention continuously according to port number, respectively these two kinds of processes be elaborated below.

1. the flow process that degrades that port number is continuous

Fig. 2 is the schematic diagram according to the described ISUP signaling process implementation method under the continuous situation of port number of the embodiment of the invention.As shown in Figure 2, initiate the calling of a N passage in initiation office (A office), the TMR parameter in its IAM message is designated as N passage, the TMRP parameter is designated as N-1～1 passage, and circuit takies continuously, does not have the CAM parameter.In tandem office (C office), when receiving that when having the REL message of RedirectionNum from target office (D office), C office will carry out rerouting according to the indicated number of RedirectionNum parameter.Here, rerouting is to utilize the parameters R edirectionNum of ITUT standard to realize, this parameter is included in the REL message, indicates the called number of routing again, receives the number routing again of the office of this message according to the RedirectionNum indication.Afterwards, if C office degrades the bearer path number to be N-1～1 by rerouting, then C office will send IAM message and indicate port number in its TMR parameter and degrade and be N-1～1 passage to D office.Circuit number between this moment A, B, the C office is N, and the circuit number of C and D interoffice is N-1～1.After ACM message from D office is received by C office, will send the ACM message that have the TMU parameter to the tandem office (B office) of its front, the bearing capacity that adopts with indication B office is N-1～1 passage.After receiving ACM message, B office will discharge unnecessary repeat circuit, and also send the ACM message that has the TMU parameter to A office, be N-1～1 passage with the bearing capacity of indicating follow-up office to adopt.After receiving ACM message, initiation office (A office) also discharges unnecessary repeat circuit, and adopts N-1～1 passage and target office (D office) after degrading to connect.So just having finished one degrades from N passage and to be the ISUP signaling process of N-1～1 passage.

2. the discontinuous flow process that degrades of port number

Fig. 3 is the schematic diagram according to the described ISUP signaling process implementation method under the continuous situation of port number of the embodiment of the invention.As shown in Figure 3, the continuous flow process that degrades of flow process and port number that degrades that port number is discontinuous is roughly the same, just needs the situation that takies with N passage of CAM parameter indication in IAM message.Equally, in ACM message, also needing to degrade with TMU parameter indication is N-1～1 passage.

Though those of ordinary skill in the art should be understood that and above explanation of the present invention is carried out with reference to its specific embodiment it does not also mean that it is limitation of the present invention.Scope of the present invention is to be defined by subsidiary claim.

Claims

1. ISUP (ISUP) signaling process implementation method that the transmission channel number is degraded may further comprise the steps:

1) initiate in the process of a multichannel calling in initiation office, initiation office will send information that contains port number and the information that the continuous situation of port number is described to its follow-up tandem office;

2) receive when using port number after degrading with indication tandem office when the tandem office adjacent from the information of target office with target office, this tandem office will discharge unnecessary passage according to described information from target office, and send the information that the port number after degrading is used in indication to other tandem offices on the initiation office direction;

3) described other tandem offices discharge its unnecessary passage according to the information that receives successively, and described indication are used the information of the port number after degrading send to initiation office direction;

4) after initiation office receives that the information of the port number after degrading is used in described indication, it will degrade according to the port number that described indication uses the information of the port number after degrading to use during described multichannel is called out for by the port number behind the degrading of target office indication, and use being connected of described port number foundation after degrading and described target office.

2. method according to claim 1, it is characterized in that, above-mentioned steps 2) further may further comprise the steps in: the described tandem office adjacent with target office of target office direction sends information and carries out rerouting to indicate this tandem office, described tandem office then carries out the rerouting operation according to this information, when described rerouting operation makes that degrading appears in the transmission channel number, port number and the target office of described tandem office after target office sends information and degrades with use connects, and described target office serves as the port number that passes through after degrading with the port number of confirming current use to described tandem office echo message then.

3. method according to claim 2, it is characterized in that, above-mentioned steps 1) further comprising the steps of in: what send when initiation office is the continuous multichannel of port number when calling out, and initiation office will send number of active lanes information and represent the continuous information of port number to follow-up tandem office; What send when initiation office is the discontinuous multichannel of port number when calling out, and initiation office will send number of active lanes information and represent the discontinuous information of port number to follow-up tandem office;

Above-mentioned steps 2) also comprises in:, also correspondingly include number of active lanes information in this information and represent the continuous or discrete information of port number in the port number and the target office when connecting of described tandem office after target office sends information and degrades with use.

4. method according to claim 3, it is characterized in that, what send when initiation office is the continuous multichannel of port number when calling out, by initiating the number of active lanes information that the follow-up tandem office of office direction sends and representing the continuous information of port number to be included in the initial address message (IAM) that not charged road takies table (CAM) parameter; What send when initiation office is the discontinuous multichannel of port number when calling out, by initiating the number of active lanes information that the follow-up tandem office of office direction sends and represent the discontinuous information of port number to be included in to have in the initial address message (IAM) that circuit takies table (CAM) parameter.

5. method according to claim 2, it is characterized in that the information of being used for of sending indicating this tandem office to carry out rerouting by the described tandem office adjacent with target office of target office direction is included in the release message (REL) of band redirection number (RedirectionNum) parameter of being sent by target office.

6. method according to claim 2 is characterized in that, is included in the full address message of being sent by target office (ACM) by the echo message of described target office to described tandem office.

7. method according to claim 1 and 2, it is characterized in that, be included in the bearing capacity parameter (TMU) of the use of the Address Complete Message (ACM) that sends by tandem office in the described information that is used for indicating the port number after use degrades that transmits between described tandem office and the initiation office.