CN104158806A

CN104158806A - Session connection establishing method, session connection establishing device, and session border control (SBC) network element

Info

Publication number: CN104158806A
Application number: CN201410397507.5A
Authority: CN
Inventors: 吴鹏程; 罗飞; 吴斌; 于喜朝; 武兴; 岳小海; 姚进华
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2014-08-13
Filing date: 2014-08-13
Publication date: 2014-11-19
Anticipated expiration: 2034-08-13
Also published as: CN104158806B

Abstract

A session connection establishing method, a session connection establishing device, and a session border control network element provided by the present invention are used to supplement the media coding and decoding formats when the media coding and decoding formats supported by a calling user device and a called user device are different, to improve the success rate of establishing the session connection. The session connection establishing method comprises the steps of using a session border controller (SBC) at the side of the called user device to receive a session request, modifying an IP address and a port in the session request into the own IP address and the port respectively to generate a first calling request and send to the called user device; when a message not supporting the media coding and decoding format in the first calling request and replied by the called user device is received, using the SBC at the side of the called user device to supplement the media coding and decoding format in the first calling request to generate a second calling request and send to the called user device; using the SBC at the side of the called user device to determine whether to establish the session connection according to the message replied by the called user device.

Description

Session connection method for building up and equipment, session border control network element

Technical field

The present invention relates to communication technical field, relate in particular to a kind of session connection method for building up and equipment, session border control (Session Border Control, SBC) network element.

Background technology

For meeting user by various types of digital subscriber lines (x Digital Subscriber Line, xDSL), local area network (LAN) (Local Area Network, LAN), WLAN (wireless local area network) (Wireless Local Area Network, fixed network access IP Multimedia System (the IP Multimedia Subsystem such as WLAN), IMS) core network, need to introduce session border control network element and complete session initiation protocol (Session Initiation Protocol, SIP) network address translation of signaling (Network Address Translation, NAT) pass through, safety, the functions such as service quality.

In IMS, session border control network element SBC is as the network element of boundary Control, for providing signaling access and media, calling subscriber equipment and called subscriber equipment access, SBC comprises signaling control section and media bearer part, be called SGW controller (Signaling Gate Controller, SGC) and Media proxy module (Media Proxy, MP), wherein, the Media Stream of the SBC that flows through is also processed in the instruction of MP reception SGC.In conversation procedure, the SGC in SBC equipment mainly carries out the forwarding of signaling, and MP forwards media.

At present, the session establishment process of IMS, rely on Session Description Protocol (the Session Description Protocol of sip message carrying, SDP) information is carried out media negotiation, if different subscriber equipmenies is supported respectively different media code/decode formats, the most at last because media code/decode format consults unsuccessfully can not set up session connection.

Describe the session negotiation process of calling subscriber equipment and called subscriber equipment in prior art in detail below in conjunction with Fig. 1.

As shown in Figure 1, between the SBC13 of SBC11, the IMS12 of calling subscriber equipment 10, calling subscriber equipment side, called subscriber equipment side and called subscriber equipment 14, the concrete steps of session connection process of establishing comprise:

Step 102, calling subscriber equipment 10 makes a call, the information of carrying SDP1 is sent to the SBC11 of calling subscriber equipment side, wherein, in SDP1, carries the media code/decode format that the media IP address of calling subscriber equipment 10 and port and calling subscriber equipment 10 are supported; Related media resource (a pair of media port in interior outside of the SBC11 application calling subscriber equipment 10 of calling subscriber equipment side, be used for carrying out continuing of media), wherein, the Media proxy module in the SBC11 of calling subscriber equipment side completes the foundation of the media forwarding table of calling subscriber equipment 10 according to the related media resource of the SBC11 application of calling subscriber equipment side.

Step 104, the related media resource that the media IP address in the SBC11 amendment SDP1 of calling subscriber equipment side and port are applied for for the SBC11 of calling subscriber equipment side in step 102, generates SDP2, the SDP2 generating is issued to IMS12 after amendment simultaneously.

Step 106, IMS12 carries out after attribute processing the SIP signaling that comprises SDP2 receiving, be sent to the SBC13 of called subscriber equipment side, the SBC13 of called subscriber equipment side receives SIP signaling (containing the amended SDP2 by the SBC11 of calling subscriber equipment side), the SBC13 of called subscriber equipment side applies for called related media resource (a pair of media port in interior outside), completes the foundation of the media forwarding table of called subscriber equipment 14.

Step 108, the media IP address in SDP2 and port are replaced with the related media resource that the SBC13 of called subscriber equipment side in step 106 applies for by the SBC13 of called subscriber equipment side, generate SDP3, the SIP signaling that comprises SDP3 is issued to called subscriber equipment 14 simultaneously.

Step 110, called subscriber equipment 14 obtains media IP address and the port of calling subscriber equipment 10 from SIP signaling, media IP address and the port of the actual SBC13 that is called subscriber equipment side, if called subscriber equipment 14 is supported the media code/decode format carrying in SDP3, media code/decode format in SDP3 is revised as to the media code/decode format of oneself supporting to called subscriber equipment 14 and media IP address and the port that is self by media IP address and port modifications generates SDP4, is sent to the SBC13 of called subscriber equipment side; If called subscriber equipment 14 is not supported the media code/decode format carrying in SDP3, perform step 118.

Step 112, the SBC13 of called subscriber equipment side modifies to media IP address and the port information of SDP4 according to applied for related media resource, generates SDP5, sends to IMS12.

Step 114, IMS12 carries out, after attribute processing, being sent to the SBC11 of calling subscriber equipment side to SIP signaling.

Step 116, media IP address and port in the SBC11 amendment SDP5 of calling subscriber equipment side are the related media resource of application in step 102, generate SDP6, be sent to calling subscriber equipment 10 simultaneously, calling subscriber equipment 10 just obtains media IP address and the port of called subscriber equipment 14, be actually media IP address and the port of the SBC11 of calling subscriber equipment side, now calling subscriber equipment 10 and called subscriber equipment 14 all obtain the other side's media IP address and port, and session connection is set up.

Step 118, called subscriber equipment 14 is not supported the media code/decode format carrying in SDP3, called subscriber equipment 14 is replied and is used to indicate called subscriber equipment and does not support the message of this media code/decode format to the SBC13 of called subscriber equipment side, i.e. 488 information.

Step 120,488 information that the SBC13 forwarding called subscriber equipment 14 of called subscriber equipment side is replied are to IMS12.

Step 122, IMS12 forwards the SBC11 of 488 message to calling subscriber equipment side.

Step 124, the SBC11 of calling subscriber equipment side forwards 488 message to calling subscriber equipment 10, and calling subscriber equipment 10 and called subscriber equipment 14 are not supported the media code/decode format of calling subscriber equipment 10 because of called subscriber equipment 14 causes session connection to be set up unsuccessfully.

Connecting process of establishing from above-mentioned Multimedia session, there is following problem in session connection process of establishing of the prior art:

If calling subscriber equipment and called subscriber equipment cause session connection to be set up unsuccessfully because the media code/decode format of supporting is inconsistent, SBC can do nothing to help and improves the success rate that session connection is set up.

Along with the media code/decode format that subscriber equipment is supported is more and more, if different user devices because of support media code/decode format inconsistent, just directly session connection cannot be successfully set up in judgement, session connection is created as power and will be had a strong impact on, and session connection is created as power the increase of the media code/decode format along with subscriber equipment support is reduced.

Summary of the invention

The embodiment of the present invention provides a kind of session connection method for building up and equipment, session border control network element, when different in order to the media code/decode format supported at calling subscriber equipment and called subscriber equipment, by media code/decode format being supplemented to the success rate of raising session connection foundation.

A kind of session connection method for building up that the embodiment of the present invention provides, comprise: the SBC of called subscriber equipment side receives the session request of the SBC transmission of calling subscriber equipment side, and the IP address in described session request and port are revised as respectively behind the IP address and port of SBC self of described called subscriber equipment side, generate the first call request and be sent to called subscriber equipment, wherein, in described the first call request, carry the media code/decode format that calling subscriber equipment is supported; When receive that described called subscriber equipment replys be used to indicate this called subscriber equipment and do not support the message of described media code/decode format time, the SBC of described called subscriber equipment side supplements and generates the second call request and be sent to described called subscriber equipment described media code/decode format, wherein, in described the second call request, carry the media code/decode format after supplementing that described calling subscriber equipment supports; The session connection that the message that the SBC of described called subscriber equipment side replys according to described called subscriber equipment judges whether to set up described calling subscriber equipment and described called subscriber equipment.

In the above-mentioned session connection method for building up that the embodiment of the present invention provides, receive the message that is used to indicate this called subscriber equipment and does not support the media code/decode format of calling subscriber equipment that called subscriber equipment is replied, also be calling subscriber equipment and called subscriber equipment because media code/decode format is when inconsistent, supplement and again carry out session connection with called subscriber equipment by the media code/decode format to calling subscriber equipment, according to called subscriber equipment whether support supplement after media code/decode format judge whether session connection can set up, unsuccessfully compare with the inconsistent direct judgement session establishment of media code/decode format of calling subscriber equipment in prior art and called subscriber equipment support, the media code/decode format of calling subscriber equipment is supplemented and also again carries out session connection, improve the success rate that session connection is set up, and, can be along with the increase of the media code/decode format of subscriber equipment support, expand supplementary media code/decode format, and then also can improve session connection set up success rate.

In a kind of possible execution mode, in the above-mentioned session connection method for building up that the embodiment of the present invention provides, the message that the SBC of described called subscriber equipment side replys according to described called subscriber equipment judges whether to set up session connection, specifically comprise: what if receive, described called subscriber equipment replied be used to indicate this called subscriber equipment supports the message of the media code/decode format after described supplementing, the SBC of described called subscriber equipment side supports the media code/decode format in the message of the media code/decode format after described supplementing to be revised as the media code/decode format that described calling subscriber equipment is supported described this called subscriber equipment that is used to indicate, and IP address and the port of the SBC self that is called subscriber equipment by the IP address in this message and port modifications, then be sent to the SBC of described calling subscriber equipment side, and set up the session connection between described calling subscriber equipment and described called subscriber equipment, what if receive, described called subscriber equipment replied be used to indicate this called subscriber equipment does not support the message of the media code/decode format after described supplementing, and the SBC of described called subscriber equipment side is used to indicate this called subscriber equipment described in forwarding and does not support the message of the media code/decode format after described supplementing to the SBC of described calling subscriber equipment side.

In a kind of possible execution mode, in the above-mentioned session connection method for building up that the embodiment of the present invention provides, also comprise: the SBC of described called subscriber equipment side receive that described called subscriber equipment replys be used to indicate this called subscriber equipment and support the message of the media code/decode format after described supplementing time, the SBC of described called subscriber equipment side record and stores the corresponding relation of the media code/decode format of media code/decode format that described called subscriber equipment supports and the support of described calling subscriber equipment.

In a kind of possible execution mode, in the above-mentioned session connection method for building up that the embodiment of the present invention provides, also comprise: set up in the laggard row conversation procedure of session connection at described calling subscriber equipment and described called subscriber equipment, after the media code/decode format of the Media Stream that need to send to this called subscriber equipment from described calling subscriber equipment being converted to according to described corresponding relation to the media code/decode format of described called subscriber equipment support, send to described called subscriber equipment, and send to described calling subscriber equipment after the media code/decode format of the Media Stream that need to send to this calling subscriber equipment from described called subscriber equipment being converted to according to described corresponding relation to the media code/decode format of described calling subscriber equipment support.

In a kind of possible execution mode, in the above-mentioned session connection method for building up that the embodiment of the present invention provides, media code/decode format after described supplementing comprises multiple media code/decode formats, and the media code/decode format after described supplementing is arranged in described the second call request according to default priority orders, wherein, described priority orders is used to indicate called subscriber equipment and selects the media code/decode format of supporting according to this priority orders.

A kind of session connection apparatus for establishing that the embodiment of the present invention provides, this equipment comprises: first module, the session request sending for receiving the SBC of described calling subscriber equipment side, and the IP address in described session request and port are revised as respectively behind the IP address and port of SBC self of described called subscriber equipment side, generate the first call request and be sent to described called subscriber equipment, wherein, in described the first call request, carry the media code/decode format that described calling subscriber equipment is supported; Second unit, for in the time receiving being used to indicate this called subscriber equipment and not supporting the message of described media code/decode format of described called subscriber equipment reply, described media code/decode format is supplemented and generates the second call request and be sent to described called subscriber equipment, wherein, in described the second call request, carry the media code/decode format after supplementing that described calling subscriber equipment supports; The session connection that the message of replying according to described called subscriber equipment judges whether to set up described calling subscriber equipment and described called subscriber equipment.

In the above-mentioned session connection apparatus for establishing that the embodiment of the present invention provides, receive the message that is used to indicate this called subscriber equipment and does not support the media code/decode format of calling subscriber equipment that called subscriber equipment is replied, also be calling subscriber equipment and called subscriber equipment because media code/decode format is when inconsistent, supplement and again carry out session connection with called subscriber equipment by the media code/decode format to calling subscriber equipment, according to called subscriber equipment whether support supplement after media code/decode format judge whether session connection can set up, unsuccessfully compare with the inconsistent direct judgement session establishment of media code/decode format of calling subscriber equipment in prior art and called subscriber equipment support, the media code/decode format of calling subscriber equipment is supplemented and also again carries out session connection, improve the success rate that session connection is set up, and, can be along with the increase of the media code/decode format of subscriber equipment support, expand supplementary media code/decode format, and then also can improve session connection set up success rate.

In a kind of possible execution mode, in the above-mentioned session connection apparatus for establishing that the embodiment of the present invention provides, when the message that described second unit is replied according to described called subscriber equipment judges whether to set up the session connection of described calling subscriber equipment and described called subscriber equipment, specifically for: what if receive, described called subscriber equipment replied be used to indicate this called subscriber equipment supports the message of the media code/decode format after described supplementing, support the media code/decode format in the message of the media code/decode format after described supplementing to be revised as the media code/decode format that described calling subscriber equipment is supported described this called subscriber equipment that is used to indicate, and IP address and the port of the SBC self that is called subscriber equipment by the IP address in this message and port modifications, then be sent to the SBC of described calling subscriber equipment side, and set up the session connection between described calling subscriber equipment and described called subscriber equipment, what if receive, described called subscriber equipment replied be used to indicate this called subscriber equipment does not support described in forwarding, to be used to indicate the message of the media code/decode format after described supplementing this called subscriber equipment and not support the message of the media code/decode format after described supplementing to the SBC of described calling subscriber equipment side.

In a kind of possible execution mode, in the above-mentioned session connection apparatus for establishing that the embodiment of the present invention provides, described second unit also for: receive that described called subscriber equipment replys be used to indicate this called subscriber equipment and support the message of the media code/decode format after described supplementing time, record and store the corresponding relation of media code/decode format that described called subscriber equipment supports and the media code/decode format of described calling subscriber equipment support.

In a kind of possible execution mode, in the above-mentioned session connection apparatus for establishing that the embodiment of the present invention provides, also comprise: Unit the 3rd, for setting up the laggard row conversation procedure of session connection at described calling subscriber equipment and described called subscriber equipment, after the media code/decode format of the Media Stream that need to send to this called subscriber equipment from described calling subscriber equipment being converted to according to described corresponding relation to the media code/decode format of described called subscriber equipment support, send to described called subscriber equipment, and send to described calling subscriber equipment after the media code/decode format of the Media Stream that need to send to this calling subscriber equipment from described called subscriber equipment being converted to according to described corresponding relation to the media code/decode format of described calling subscriber equipment support.

In a kind of possible execution mode, in the above-mentioned session connection apparatus for establishing that the embodiment of the present invention provides, media code/decode format after described second unit supplements comprises multiple media code/decode formats, and the media code/decode format after described supplementing is arranged in described the second call request according to default priority orders, wherein, described priority orders is used to indicate called subscriber equipment and selects the media code/decode format of supporting according to this priority orders.

A kind of session border control SBC network element that the embodiment of the present invention provides, this SBC network element comprises the session connection apparatus for establishing that the embodiment of the present invention provides.

In the above-mentioned session border control SBC network element that the embodiment of the present invention provides, in SBC network element, add the session connection apparatus for establishing of the embodiment of the present invention, make to receive that called subscriber equipment replys when being used to indicate this called subscriber equipment and not supporting the message of media code/decode format of calling subscriber equipment, also be calling subscriber equipment and called subscriber equipment because media code/decode format is when inconsistent, supplement and again carry out session connection with called subscriber equipment by the media code/decode format to calling subscriber equipment, according to called subscriber equipment whether support supplement after media code/decode format judge whether session connection can set up, unsuccessfully compare with the inconsistent direct judgement session establishment of media code/decode format of calling subscriber equipment in prior art and called subscriber equipment support, the media code/decode format of calling subscriber equipment is supplemented and also again carries out session connection, improve the success rate that session connection is set up, and, can be along with the increase of the media code/decode format of subscriber equipment support, expand supplementary media code/decode format, and then also can improve session connection set up success rate.

Brief description of the drawings

Fig. 1 is the schematic flow sheet of session connection method for building up in prior art;

The schematic flow sheet of the session connection method for building up that Fig. 2 provides for the embodiment of the present invention;

The schematic flow sheet that the session connection apparatus for establishing auxiliary session that Fig. 3 provides for the embodiment of the present invention connects;

The structural representation of Media proxy module in the session connection apparatus for establishing that Fig. 4 provides for the embodiment of the present invention.

Embodiment

Below in conjunction with accompanying drawing, the embodiment of the session connection method for building up that the embodiment of the present invention is provided and equipment, session border control network element is described in detail.

A kind of session connection method for building up that the embodiment of the present invention provides, as shown in Figure 2, comprising:

Step 202, the SBC of called subscriber equipment side receives the session request of the SBC transmission of calling subscriber equipment side, and the IP address in session request and port are revised as respectively behind the IP address and port of SBC self of called subscriber equipment side, generate the first call request and be sent to called subscriber equipment, wherein, in the first call request, carry the media code/decode format that calling subscriber equipment is supported;

Step 204, in the time receiving called subscriber equipment replys be used to indicate this called subscriber equipment and do not support the message of the media code/decode format carrying in the first call request, the SBC of called subscriber equipment side supplements and generates the second call request and be sent to called subscriber equipment the media code/decode format in the first call request, wherein, in the second call request, carry calling subscriber equipment support supplement after media code/decode format;

Step 206, the session connection that the message that the SBC of called subscriber equipment side replys according to called subscriber equipment judges whether to set up calling subscriber equipment and called subscriber equipment.

In the session connection method for building up that the embodiment of the present invention provides, receive the message that is used to indicate this called subscriber equipment and does not support the media code/decode format of calling subscriber equipment that called subscriber equipment is replied, also be calling subscriber equipment and called subscriber equipment because media code/decode format is when inconsistent, supplement and again carry out session connection with called subscriber equipment by the media code/decode format to calling subscriber equipment, according to called subscriber equipment whether support supplement after media code/decode format judge whether session connection can set up, unsuccessfully compare with the inconsistent direct judgement session establishment of media code/decode format of calling subscriber equipment in prior art and called subscriber equipment support, the media code/decode format of calling subscriber equipment is supplemented and also again carries out session connection, improve the success rate that session connection is set up, and, can be along with the increase of the media code/decode format of subscriber equipment support, expand supplementary media code/decode format, and then also can improve session connection set up success rate.

What deserves to be explained is, calling subscriber equipment and called subscriber equipment are the titles defining in order to distinguish in a specific embodiment of the present invention, in another specific embodiment of the present invention, calling subscriber equipment also can be used as called subscriber equipment, equally, called subscriber equipment also can be used as calling subscriber equipment.

The SBC of called subscriber equipment side is in the time that the media code/decode format in the first call request supplements, and supplementary media code/decode format sets in advance according to following 2:

Can be identified by the SBC of called subscriber equipment side;

Can carry out format conversion by the media code/decode format in SBC and the first call request.

In a kind of possible execution mode, in the session connection method for building up that the embodiment of the present invention provides, the message that the SBC of called subscriber equipment side replys according to called subscriber equipment judges whether to set up session connection, specifically comprise: the message of what called subscriber equipment replied if receive the be used to indicate media code/decode format that this called subscriber equipment supports in the second call request after supplementing, the media code/decode format in the message of the media code/decode format after being used to indicate this called subscriber equipment and supporting in the second call request to supplement is revised as the media code/decode format that calling subscriber equipment is supported by the SBC of called subscriber equipment side, and IP address and the port of the SBC self that is called subscriber equipment by the IP address in this message and port modifications, then be sent to the SBC of calling subscriber equipment side, and set up the session connection between calling subscriber equipment and called subscriber equipment, the message of what called subscriber equipment replied if receive the be used to indicate media code/decode format that this called subscriber equipment do not support in the second call request after supplementing, the message of the media code/decode format of the SBC of called subscriber equipment side after forwarding and being used to indicate this called subscriber equipment and not supporting to supplement in the second call request is to the SBC of calling subscriber equipment side.

In embodiments of the present invention, although the media code/decode format of calling subscriber equipment and the media code/decode format of called subscriber equipment are inconsistent, but supplement and generate the second call request and again issue called subscriber equipment by the media code/decode format to calling subscriber equipment, the media code/decode format of called subscriber equipment after may supporting in the second call request to supplement, thus the success rate that session connection is set up increased.

Specifically: if the media code/decode format after called subscriber equipment is supported in the second call request to supplement, the message of the media code/decode format of called subscriber equipment after replying and being used to indicate this called subscriber equipment and supporting in the second call request to supplement, between calling subscriber equipment and called subscriber equipment, session connection is successfully established.The media code/decode format after if called subscriber equipment is not supported in the second call request to supplement, the message of the media code/decode format of called subscriber equipment after replying and being used to indicate this called subscriber equipment and not supporting in the second call request to supplement, between calling subscriber equipment and called subscriber equipment, session connection is set up unsuccessfully.

In a kind of possible execution mode, in the session connection method for building up that the embodiment of the present invention provides, also comprise: the SBC of called subscriber equipment side receive that called subscriber equipment replys be used to indicate the message of media code/decode format after this called subscriber equipment supplements in supporting the second call request time, the SBC of called subscriber equipment side record and stores the corresponding relation of the media code/decode format of media code/decode format that called subscriber equipment supports and calling subscriber equipment support.

In embodiments of the present invention, receive that called subscriber equipment replys be used to indicate the message of media code/decode format after this called subscriber equipment supplements in supporting the second call request time, also be the media code/decode format after called subscriber equipment is supported in the second call request to supplement, session connection is successfully established, in conversation procedure, calling subscriber equipment and called subscriber equipment will carry out session by the conversion of media code/decode format, record and store the media code/decode format of called subscriber equipment support and the corresponding relation of the media code/decode format that calling subscriber equipment is supported, to carry out the media code/decode format conversion of the Media Stream between calling subscriber equipment and called subscriber equipment in conversation procedure.

In a kind of possible execution mode, in the session connection method for building up that the embodiment of the present invention provides, also comprise: set up in the laggard row conversation procedure of session connection at calling subscriber equipment and called subscriber equipment, the corresponding relation of the media code/decode format that the media code/decode format of supporting according to called subscriber equipment and calling subscriber equipment are supported, after the media code/decode format of the Media Stream that need to send to this called subscriber equipment from calling subscriber equipment being converted to the media code/decode format of called subscriber equipment support, send to called subscriber equipment, and the corresponding relation of the media code/decode format of the media code/decode format of supporting according to called subscriber equipment and calling subscriber equipment support, after the media code/decode format of the Media Stream that need to send to this calling subscriber equipment from called subscriber equipment being converted to the media code/decode format of calling subscriber equipment support, send to calling subscriber equipment.

In embodiments of the present invention, called subscriber equipment is not supported the media code/decode format in the first call request and media code/decode format after supporting in the second call request to supplement, session connection is successfully established while carrying out session, calling subscriber equipment and called subscriber equipment will carry out session by the conversion of media code/decode format, when concrete enforcement, according to the corresponding relation of the media code/decode format of the media code/decode format of called subscriber equipment support and calling subscriber equipment support, the media code/decode format of the Media Stream of calling subscriber equipment and called subscriber equipment transmission is carried out to the conversion of media code/decode format, can guarantee that the Media Stream that calling subscriber equipment and called subscriber equipment send all can be play by the other side.

Certainly, those skilled in the art should be understood that, although the SBC of called subscriber equipment side records and stores the media code/decode format of called subscriber equipment support and the corresponding relation of the media code/decode format that calling subscriber equipment is supported, but the SBC of called subscriber equipment side can be sent to this corresponding relation the SBC of calling subscriber equipment side, also the Media Stream of calling subscriber equipment and called subscriber equipment transmission being carried out to the conversion of media code/decode format can be carried out by the SBC of called subscriber equipment side, also can be carried out by the SBC of calling subscriber equipment side, also can change to improve conversion efficiency to media code/decode format by both simultaneously.

In a kind of possible execution mode, in the session connection method for building up that the embodiment of the present invention provides, media code/decode format after supplementing in the second call request comprises multiple media code/decode formats, and the media code/decode format after supplementing in the second call request is arranged in the second call request according to default priority orders, wherein, this priority orders is used to indicate called subscriber equipment and selects the media code/decode format of supporting according to this priority orders.

In embodiments of the present invention, in the time that the media code/decode format in the first call request supplements, when media code/decode format after supplementing is multiple, media code/decode format after supplementing can random alignment, as preferred embodiment comparatively, media code/decode format after supplementing is arranged in the second call request according to predetermined priority orders, so that when the media code/decode format that called subscriber equipment is selected to support in order, ensure that called subscriber equipment selects most preferred media code/decode format.

In the specific implementation, if the media code/decode format of called subscriber equipment support can carry out format conversion with the media code/decode format of multiple calling subscriber equipment supports, also can select to record and store the media code/decode format that arbitrary calling subscriber equipment is supported according to predetermined priority orders, and this media code/decode format is returned back to calling subscriber equipment, the media code/decode format using during as calling subscriber equipment and called subscriber equipment session.

At one, comparatively in specific embodiment, predetermined priority orders can sort according to the distortion factor after conversion, the prioritization that the distortion factor is less; At another, comparatively in specific embodiment, predetermined priority orders can sort according to the conversion speed of media code/decode format, the prioritization that conversion speed is fast, certainly, one skilled in the art will appreciate that predetermined priority also has a lot, and be not used in concrete restriction herein.

In specific embodiment comparatively, in order to ensure the response speed of session establishment, also reduce the prolongation of media code/decode format, can to carry out supplementary media code/decode format pre-stored by corresponding each media code/decode format, in the time that the media code/decode format to calling subscriber equipment supplements, can directly carry out supplementing of media code/decode format in the mode of searching, reduce the time of supplementing media code/decode format, improve response speed.

A kind of session connection apparatus for establishing that the embodiment of the present invention provides, this equipment comprises: first module, the session request sending for receiving the SBC of calling subscriber equipment side, and the IP address in session request and port are revised as respectively behind the IP address and port of SBC self of called subscriber equipment side, generate the first call request and be sent to called subscriber equipment, wherein, in the first call request, carry the media code/decode format that calling subscriber equipment is supported; Second unit, for in the time receiving being used to indicate this called subscriber equipment and not supporting the message of the first call request media code/decode format of called subscriber equipment reply, media code/decode format in the first call request is supplemented and generates the second call request and be sent to called subscriber equipment, wherein, in the second call request, carry calling subscriber equipment support supplement after media code/decode format; The session connection that the message of replying according to called subscriber equipment judges whether to set up calling subscriber equipment and called subscriber equipment.

In the session connection apparatus for establishing that the embodiment of the present invention provides, receive the message that is used to indicate this called subscriber equipment and does not support the media code/decode format of calling subscriber equipment that called subscriber equipment is replied, also be calling subscriber equipment and called subscriber equipment because media code/decode format is when inconsistent, supplement and again carry out session connection with called subscriber equipment by the media code/decode format to calling subscriber equipment, according to called subscriber equipment whether support supplement after media code/decode format judge whether session connection can set up, unsuccessfully compare with the inconsistent direct judgement session establishment of media code/decode format of calling subscriber equipment in prior art and called subscriber equipment support, the media code/decode format of calling subscriber equipment is supplemented and also again carries out session connection, improve the success rate that session connection is set up, and, can be along with the increase of the media code/decode format of subscriber equipment support, expand supplementary media code/decode format, and then also can improve session connection set up success rate.

In a kind of possible execution mode, in the session connection apparatus for establishing that the embodiment of the present invention provides, when the message that second unit is replied according to described called subscriber equipment judges whether to set up the session connection of described calling subscriber equipment and described called subscriber equipment, specifically for: the message of what called subscriber equipment replied if receive the be used to indicate media code/decode format that this called subscriber equipment supports in the second call request after supplementing, the media code/decode format in the message of the media code/decode format after being used to indicate this called subscriber equipment and supporting in the second call request to supplement is revised as to the media code/decode format that calling subscriber equipment is supported, and IP address and the port of the SBC self that is called subscriber equipment by the IP address in this message and port modifications, then be sent to the SBC of calling subscriber equipment side, and set up the session connection between calling subscriber equipment and called subscriber equipment, the message of what called subscriber equipment replied if receive the be used to indicate media code/decode format that this called subscriber equipment do not support in the second call request after supplementing, forwards the message of the media code/decode format after being used to indicate this called subscriber equipment and not supporting to supplement in the second call request to the SBC of calling subscriber equipment side.

In a kind of possible execution mode, in the session connection apparatus for establishing that the embodiment of the present invention provides, second unit also for: receive that called subscriber equipment replys be used to indicate this called subscriber equipment and support the message of media code/decode format after the second call request supplements time, record and store the corresponding relation of media code/decode format that called subscriber equipment supports and the media code/decode format of calling subscriber equipment support.

The session connection apparatus for establishing providing in the embodiment of the present invention can be SBC, and SGC wherein comprises above-mentioned first module and second unit, and MP wherein comprises above-mentioned Unit the 3rd.

Below in conjunction with concrete flow process, the effect of unit in session connection apparatus for establishing is described.

As shown in Figure 3, the SBC providing in the embodiment of the present invention comprises SGW controller SGC30, SGW controller SGC30 comprises: IP address conversioning unit 300 (corresponding to above-mentioned first module) and medium type control unit 301 (corresponding to above-mentioned second unit), session connection apparatus for establishing auxiliary session connects the idiographic flow of setting up, and comprising:

Step 302, IP address conversioning unit 300 is received the first call request that calling subscriber equipment sends, wherein, in the first call request, carry SDP1, also carry the media IP address of calling subscriber equipment and the media code/decode format of port and calling subscriber equipment support.

Step 304, media IP address and port that IP address conversioning unit 300 is self by the media IP address in SDP1 and port modifications, generate SDP2, wherein in SDP2, carry the media IP address of SGW controller SGC30 and the media code/decode format of port and calling subscriber equipment support, and first call request of carrying SDP2 is sent to called subscriber equipment.

Step 306, called subscriber equipment is received the first call request, receive the media code/decode format of SDP2, while confirming not support the media code/decode format of (in the first call request) in SDP2, reply is used to indicate called subscriber equipment and does not support the message of media code/decode format in the first call request to IP address conversioning unit 300, is also 488 message.

Step 308, when IP address conversioning unit 300 is received 488 message first, this 488 message is forwarded to medium type control unit 301,488 message trigger medium type control units 301 supplement and generate the second call request the media code/decode format in the first call request, SDP3 is carried in the second call request, wherein, in SDP3, carry supplement after media code/decode format and media IP address and the port of SGW controller SGC30.

Step 310, medium type control unit 301 is again sent to called subscriber equipment by the second call request and carries out session connection, in the second call request, carries SDP3.

Step 312, called subscriber equipment is received the second call request, receive in SDP3 supplement after media code/decode format, when media code/decode format after confirming to support (in the second call request) in SDP3 to supplement, the message of the media code/decode format that reply is used to indicate called subscriber equipment after supporting in the second call request to supplement is to medium type control unit 301, in the message that called subscriber equipment is replied, carry SDP4, wherein, in SDP4, carry the media code/decode format of called subscriber equipment support and media IP address and the port of called subscriber equipment;

And medium type control unit 301 records and stores the media code/decode format of described called subscriber equipment support and the corresponding relation of the media code/decode format that described calling subscriber equipment is supported.

Certainly, if when the media code/decode format after supplementing in the second call request is not supported, execution step 318.

Step 314, when the message of what medium type control unit 301 received that called subscriber equipment replys the be used to indicate media code/decode format that called subscriber equipment supports in the second call request after supplementing, record and store the media code/decode format of called subscriber equipment support and the corresponding relation of the media code/decode format that calling subscriber equipment is supported, the message of simultaneously called subscriber equipment being replied is forwarded to IP address conversioning unit 300.

Step 316, in the message that IP address conversioning unit 300 is replied called subscriber equipment, media IP address and the port modifications of SDP4 are media IP address and the port of SGW controller SGC30, and the media code/decode format of called subscriber equipment support in SDP4 is replaced with to the media code/decode format in the first call request, the message that SDP5 is carried in generation is sent to the SBC of calling subscriber equipment side, and session connection is successfully established.

Step 318, when called subscriber equipment is not supported the media code/decode format of (in the second call request) in SDP3, the message of the media code/decode format that reply is used to indicate called subscriber equipment after not supporting in the second call request to supplement, to medium type control unit 301, also reply 488 message to medium type control unit 301.

Step 320, when medium type control unit 301 is received 488 message for the second time, is directly forwarded to this 488 message the SBC of calling subscriber equipment side, and session connection is set up unsuccessfully.

In a kind of possible execution mode, as shown in Figure 4, in the SBC that the embodiment of the present invention provides, also comprise Media proxy module MP400, Media proxy module MP400 comprises the first media format conversion unit 402, the second media format conversion unit 403 and media forwarding unit 404; Wherein, the first media format conversion unit 402 and the second media format conversion unit 403, be equivalent to above-mentioned Unit the 3rd.

Above-mentioned medium type control unit 301 is also for sending to media forwarding unit 404 by the corresponding relation of the media code/decode format of the media code/decode format of called subscriber equipment support and described calling subscriber equipment support.

The corresponding relation of the media code/decode format that the media code/decode format that media forwarding unit 404 is supported for the called subscriber equipment receiving and medium Type Control unit 301 sends and calling subscriber equipment are supported, and according to this corresponding relation control first media format conversion unit 402 and the second media format conversion unit 403, the Media Stream of calling subscriber equipment and called subscriber equipment transmission is carried out to the conversion of media code/decode format, set up in the laggard row conversation procedure of session connection at calling subscriber equipment and called subscriber equipment, the corresponding relation of the media code/decode format that the media code/decode format of supporting according to called subscriber equipment and calling subscriber equipment are supported, by the media code/decode format of the Media Stream that need to send to this called subscriber equipment 406 from calling subscriber equipment be converted to called subscriber equipment support media code/decode format after (being Media Stream 408) send to called subscriber equipment, and the corresponding relation of the media code/decode format of the media code/decode format of supporting according to called subscriber equipment and calling subscriber equipment support, by the media code/decode format of the Media Stream that need to send to this calling subscriber equipment 410 from called subscriber equipment be converted to calling subscriber equipment support media code/decode format after (being Media Stream 412) send to calling subscriber equipment.

In a kind of possible execution mode, in the session connection apparatus for establishing that the embodiment of the present invention provides, media code/decode format after second unit supplements comprises multiple media code/decode formats, and the media code/decode format after supplementing in the second call request is arranged in the second call request according to default priority orders, wherein, this priority orders is used to indicate called subscriber equipment and selects the media code/decode format of supporting according to this priority orders.

In sum, a kind of session connection method for building up and equipment that the embodiment of the present invention provides, session border control network element, receive the message that is used to indicate this called subscriber equipment and does not support the media code/decode format of calling subscriber equipment that called subscriber equipment is replied, also be calling subscriber equipment and called subscriber equipment because media code/decode format is when inconsistent, the media code/decode format of calling subscriber equipment is supplemented and also again carries out session connection, improve the success rate that session connection is set up, and, can be along with the increase of the media code/decode format of subscriber equipment support, expand supplementary media code/decode format, and then also can improve session connection set up success rate.

Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt complete hardware implementation example, completely implement software example or the form in conjunction with the embodiment of software and hardware aspect.And the present invention can adopt the form at one or more upper computer programs of implementing of computer-usable storage medium (including but not limited to magnetic disc store and optical memory etc.) that wherein include computer usable program code.

The present invention is with reference to describing according to flow chart and/or the block diagram of the method for the embodiment of the present invention, equipment (system) and computer program.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, the instruction that makes to carry out by the processor of computer or other programmable data processing device produces the device for realizing the function of specifying at flow process of flow chart or multiple flow process and/or square frame of block diagram or multiple square frame.

These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, the instruction that makes to be stored in this computer-readable memory produces the manufacture that comprises command device, and this command device is realized the function of specifying in flow process of flow chart or multiple flow process and/or square frame of block diagram or multiple square frame.

These computer program instructions also can be loaded in computer or other programmable data processing device, make to carry out sequence of operations step to produce computer implemented processing on computer or other programmable devices, thereby the instruction of carrying out is provided for realizing the step of the function of specifying in flow process of flow chart or multiple flow process and/or square frame of block diagram or multiple square frame on computer or other programmable devices.

Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if these amendments of the present invention and within modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.

Claims

1. a session connection method for building up, is characterized in that, comprising:

The SBC of called subscriber equipment side receives the session request of the SBC transmission of calling subscriber equipment side, and the IP address in described session request and port are revised as respectively behind the IP address and port of SBC self of described called subscriber equipment side, generate the first call request and be sent to called subscriber equipment, wherein, in described the first call request, carry the media code/decode format that calling subscriber equipment is supported;

When receive that described called subscriber equipment replys be used to indicate this called subscriber equipment and do not support the message of described media code/decode format time, the SBC of described called subscriber equipment side supplements and generates the second call request and be sent to described called subscriber equipment described media code/decode format, wherein, in described the second call request, carry the media code/decode format after supplementing that described calling subscriber equipment supports;

The session connection that the message that the SBC of described called subscriber equipment side replys according to described called subscriber equipment judges whether to set up described calling subscriber equipment and described called subscriber equipment.

2. session connection method for building up according to claim 1, is characterized in that, the message that the SBC of described called subscriber equipment side replys according to described called subscriber equipment judges whether to set up session connection, specifically comprises:

What if receive, described called subscriber equipment replied be used to indicate this called subscriber equipment supports the message of the media code/decode format after described supplementing, the SBC of described called subscriber equipment side supports the media code/decode format in the message of the media code/decode format after described supplementing to be revised as the media code/decode format that described calling subscriber equipment is supported described this called subscriber equipment that is used to indicate, and IP address and the port of the SBC self that is called subscriber equipment by the IP address in this message and port modifications, then be sent to the SBC of described calling subscriber equipment side, and set up the session connection between described calling subscriber equipment and described called subscriber equipment,

What if receive, described called subscriber equipment replied be used to indicate this called subscriber equipment does not support the message of the media code/decode format after described supplementing, and the SBC of described called subscriber equipment side is used to indicate this called subscriber equipment described in forwarding and does not support the message of the media code/decode format after described supplementing to the SBC of described calling subscriber equipment side.

3. session connection method for building up according to claim 2, is characterized in that, also comprises:

The SBC of described called subscriber equipment side receive that described called subscriber equipment replys be used to indicate this called subscriber equipment and support the message of the media code/decode format after described supplementing time, the SBC of described called subscriber equipment side record and stores the corresponding relation of the media code/decode format of media code/decode format that described called subscriber equipment supports and the support of described calling subscriber equipment.

4. session connection method for building up according to claim 3, is characterized in that, also comprises:

Set up in the laggard row conversation procedure of session connection at described calling subscriber equipment and described called subscriber equipment, after the media code/decode format of the Media Stream that need to send to this called subscriber equipment from described calling subscriber equipment being converted to according to described corresponding relation to the media code/decode format of described called subscriber equipment support, send to described called subscriber equipment, and send to described calling subscriber equipment after the media code/decode format of the Media Stream that need to send to this calling subscriber equipment from described called subscriber equipment being converted to according to described corresponding relation to the media code/decode format of described calling subscriber equipment support.

5. session connection method for building up according to claim 1, is characterized in that,

Media code/decode format after described supplementing comprises multiple media code/decode formats, and the media code/decode format after described supplementing is arranged in described the second call request according to default priority orders, wherein, described priority orders is used to indicate called subscriber equipment and selects the media code/decode format of supporting according to this priority orders.

6. a session connection apparatus for establishing, is characterized in that, this equipment comprises:

First module, the session request sending for receiving the SBC of described calling subscriber equipment side, and the IP address in described session request and port are revised as respectively behind the IP address and port of SBC self of described called subscriber equipment side, generate the first call request and be sent to described called subscriber equipment, wherein, in described the first call request, carry the media code/decode format that described calling subscriber equipment is supported;

Second unit, for in the time receiving being used to indicate this called subscriber equipment and not supporting the message of described media code/decode format of described called subscriber equipment reply, described media code/decode format is supplemented and generates the second call request and be sent to described called subscriber equipment, wherein, in described the second call request, carry the media code/decode format after supplementing that described calling subscriber equipment supports;

The session connection that the message of replying according to described called subscriber equipment judges whether to set up described calling subscriber equipment and described called subscriber equipment.

7. session connection apparatus for establishing according to claim 6, it is characterized in that, when the message that described second unit is replied according to described called subscriber equipment judges whether to set up the session connection of described calling subscriber equipment and described called subscriber equipment, specifically for:

What if receive, described called subscriber equipment replied be used to indicate this called subscriber equipment supports the message of the media code/decode format after described supplementing, support the media code/decode format in the message of the media code/decode format after described supplementing to be revised as the media code/decode format that described calling subscriber equipment is supported described this called subscriber equipment that is used to indicate, and IP address and the port of the SBC self that is called subscriber equipment by the IP address in this message and port modifications, then be sent to the SBC of described calling subscriber equipment side, and set up the session connection between described calling subscriber equipment and described called subscriber equipment,

What if receive, described called subscriber equipment replied be used to indicate this called subscriber equipment does not support described in forwarding, to be used to indicate the message of the media code/decode format after described supplementing this called subscriber equipment and not support the message of the media code/decode format after described supplementing to the SBC of described calling subscriber equipment side.

8. session connection apparatus for establishing according to claim 7, is characterized in that, described second unit also for:

Receive that described called subscriber equipment replys be used to indicate this called subscriber equipment and support the message of the media code/decode format after described supplementing time, record and store the corresponding relation of media code/decode format that described called subscriber equipment supports and the media code/decode format of described calling subscriber equipment support.

9. session connection apparatus for establishing according to claim 8, is characterized in that, also comprises:

Unit the 3rd, for setting up the laggard row conversation procedure of session connection at described calling subscriber equipment and described called subscriber equipment, after the media code/decode format of the Media Stream that need to send to this called subscriber equipment from described calling subscriber equipment being converted to according to described corresponding relation to the media code/decode format of described called subscriber equipment support, send to described called subscriber equipment, and send to described calling subscriber equipment after the media code/decode format of the Media Stream that need to send to this calling subscriber equipment from described called subscriber equipment being converted to according to described corresponding relation to the media code/decode format of described calling subscriber equipment support.

10. session connection apparatus for establishing according to claim 6, is characterized in that,

Media code/decode format after described second unit supplements comprises multiple media code/decode formats, and the media code/decode format after described supplementing is arranged in described the second call request according to default priority orders, wherein, described priority orders is used to indicate called subscriber equipment and selects the media code/decode format of supporting according to this priority orders.

11. 1 kinds of session border control SBC network elements, is characterized in that, this SBC network element comprises the session connection apparatus for establishing described in the arbitrary claim of claim 6-10.