CN102457477A

CN102457477A - Method and device for processing multimedia priority service session of Internet protocol multimedia subsystem (IMS)

Info

Publication number: CN102457477A
Application number: CN2010105147220A
Authority: CN
Inventors: 段小嫣; 衣强; 金辉
Original assignee: Huawei Device Co Ltd
Current assignee: Huawei Device Co Ltd; Huawei Device Shenzhen Co Ltd
Priority date: 2010-10-21
Filing date: 2010-10-21
Publication date: 2012-05-16
Anticipated expiration: 2030-10-21
Also published as: CN102457477B

Abstract

The embodiment of the invention provides a method and a device for processing a multimedia priority service session of an Internet protocol multimedia subsystem (IMS). The method comprises the following steps of: when the multimedia priority service session of the IMS is established, receiving a session establishment request message sent by a terminal or other network entities, wherein the session establishment request message comprises indicating information of a priority level of a voice media and a priority level of a video media of the multimedia priority service session; determining the priority level of the voice media and the priority level of the video media according to the indicating information; and sending the message which comprises the priority level of the voice media and the priority level of the video media to a policy and charging rules function (PCRF) entity to make the PCRF send establishment of carriers with corresponding priority levels to the voice media and the video media according to the priority level of the voice media and the priority level of the video media. By the embodiment of the invention, on the network side, different priority level processing policies can be adopted for different media in the multimedia priority service session of the IMS.

Description

IMS multimedia priority service conversation processing method and device

Technical field

The present invention relates to the communications field, relate in particular to a kind of IMS multimedia priority service conversation processing method and device.

Background technology

IMS (IP Multimedia Subsystem; IP-based IP multimedia subsystem, IMS) be based on the multimedia service communication network of IP (Internet Protocol, the agreement that interconnects between the network), the multimedia service has here comprised multiple medium and composite service thereof such as voice, video, data; It adopts the IMS core network subsystem to carry out business control; Packet switching network (PS, PacketSwitched) or circuit-switched network (CS, Circuit Switched) as access network; For signaling and media delivery provide carrying, be the core technology of the next-generation communication network of realizing that multiple network merges.

MPS (Multimedia Priority Service; The multimedia priority service) can make contracted should business the user obtain to have the conversational services of priority through public network, the conversational services of this priority can realize proper communication under network congestion.At present; MPS user can use MPS-subscribed UE (MPS contracted user terminal), also promptly has signatory SIM (Subscriber Identity Module, user identification module) the card terminal of MPS and initiates the priority session; Or use normal UE (domestic consumer terminal); The priority session is initiated at the terminal that also promptly has common SIM, and network side entity can be according to the priority indication information of this session, this conversation request of priority treatment and be preferably this session Resources allocation.

The scheme that provides the session of IMS voice priority to set up in the prior art; But the processing method of the IMS multimedia priority service session that comprises the voice and video medium is not provided; Can't support different medium to have the IMS multimedia priority service session context of different priorities, lack flexibility aspect the IMS multimedia priority service providing.

Summary of the invention

The embodiment of the invention provides a kind of IMS multimedia priority service conversation processing method and device; When having different priorities with voice medium in the session of convenient IMS multimedia priority service and video media; Can set up this IMS multimedia priority service session; And in IMS multimedia priority service conversation procedure, can make amendment or switch the priority of voice medium and video media.

The above-mentioned purpose of the embodiment of the invention realizes through following technical scheme:

A kind of IMS multimedia priority service conversation processing method; Said method comprises: when the session of IMS multimedia priority service is set up; Request message is set up in the session that receiving terminal or other network entities send, and the indication information of priority of priority and video media that request message comprises the voice medium of said multimedia priority service session is set up in said session; According to said indication information, confirm the priority of said voice medium and the priority of said video media; The message of priority that will comprise priority and the said video media of said voice medium sends to strategy and billing function entity PCRF; So that said PCRF is according to the priority of said voice medium and the priority of said video media, for said voice medium and said video media initiate to set up the carrying with respective priority.

A kind of IMS multimedia priority service conversation processing method; Said method comprises: in IMS multimedia priority service conversation procedure; The session updates request message that receiving terminal or other network entities send, said session updates request message comprises the indication information that the priority of the priority of the voice medium of said multimedia priority service session and video media is made amendment or switched; According to said indication information, the priority of the said voice medium after definite modification or the switching and the priority of said video media; To comprise said modification or switch after the message of priority of priority and said video media of voice medium send to strategy and billing function entity PCRF; So that said PCRF, initiates modification or switching to the priority of the carrying of the priority of the carrying of said voice medium and said video media according to said modification or the priority of the said voice medium after switching and the priority of said video media.

A kind of IMS multimedia priority service session processing unit; Said device comprises: receiving element; Be used for when the session of IMS multimedia priority service is set up; Request message is set up in the session that receiving terminal or other network entities send, and priority and the priority of video media that request message comprises the voice medium of said multimedia priority service session is set up in said session; Confirm the unit, be used for, confirm the priority of said voice medium and the priority of said video media according to said indication information; Transmitting element; The message of priority that is used for comprising priority and the said video media of said voice medium sends to strategy and billing function entity PCRF; So that said PCRF is according to the priority of said voice medium and the priority of said video media, for said voice medium and said video media initiate to set up the carrying with respective priority.

A kind of IMS multimedia priority service session processing unit; Said device comprises: receiving element; Be used at IMS multimedia priority service conversation procedure; The session updates request message that receiving terminal or other network entities send, said session updates request message comprises the indication information that the priority of the priority of the voice medium of said multimedia priority service session and video media is made amendment or switched; Confirm the unit, be used for, the said voice medium after definite modification or the switching and the priority of said video media according to said indication information; Transmitting element; Be used for comprising said modification or switch after the message of priority of priority and said video media of voice medium send to strategy and billing function entity PCRF; So that said PCRF, initiates modification or switching to the priority of the carrying of the priority of the carrying of said voice medium and said video media according to said modification or the priority of the said voice medium after switching and the priority of said video media.

Method and apparatus through the embodiment of the invention; The network side corresponding entity of IMS multimedia priority service session can be taked different processed strategies to medium (for example voice and video) different in the session of IMS multimedia priority service, thereby effectively utilize Internet resources more flexibly IMS is provided priority service.

Description of drawings

Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, does not constitute qualification of the present invention.In the accompanying drawings:

Fig. 1 is the flow chart of the IMS multimedia priority service conversation processing method of one embodiment of the invention;

Fig. 2 is the flow chart of the IMS multimedia priority service conversation processing method of another embodiment of the present invention;

Fig. 3 sets up flow chart according to the IMS multimedia priority service session caller of the method for present embodiment;

Fig. 4 is the called flow chart of setting up of IMS multimedia priority service session according to the method for present embodiment;

Fig. 5 is the IMS multimedia priority service conversation media priority modification flow chart according to the method for present embodiment;

Fig. 6 is the composition frame chart of the IMS multimedia priority service session processing unit of one embodiment of the invention;

Fig. 7 is the composition frame chart of the IMS multimedia priority service session processing unit of another embodiment of the present invention.

Embodiment

For the purpose, technical scheme and the advantage that make the embodiment of the invention is clearer,, the embodiment of the invention is explained further details below in conjunction with embodiment and accompanying drawing.At this, illustrative examples of the present invention and explanation thereof are used to explain the present invention, but not as to qualification of the present invention.

At present, adopt the Multimedia session of the IMS network platform to be called the IMS Multimedia session, the Multimedia session here comprises voice, video, also possibly comprise other medium.In the present embodiment, the IMS Multimedia session is an example with the IMS session that only comprises voice medium and video media.

The flow chart of a kind of IMS multimedia priority service conversation processing method that Fig. 1 provides for the embodiment of the invention; This method is applied to P-CSCF (the Proxy-Call Session Control Function in the IMS conversation procedure; Proxy Call Session Control Function) entity; Please with reference to Fig. 1, this method comprises:

Step 101: at multimedia priority service (MPS) when session is set up; P-CSCF receiving terminal or other network entities; S-CSCF (Serving-Call Session Control Function for example; Request (SIP INVITE) message is set up in the session of service call conversation control function) sending; Voice medium and video media that said SIP INVITE carries this MPS session have the different priorities indication information, for example comprise the indication information of priority of priority and video media of the voice medium of this MPS session;

Wherein, The property column indication voice medium of the media description part of the message body of employing SDP that can be through said SIP INVITE and the absolute priority of video media; The property column indication voice medium of the media description part of the message body of employing SDP that also can be through said SIP INVITE and the relative priority level of video media, the priority header field of message header that can also be through said SIPINVITE message is indicated the priority of voice medium and video media.

Wherein, The priority header field indication voice medium of the message header through said SIP INVITE and the priority of video media; Can be through increasing the priority that the media priority parameter is indicated voice medium and video media at said priority header field, also can be through indicate the priority of voice medium and video media at said priority header field increase media parameter and weighted value thereof.

Above-mentionedly just illustrate, present embodiment not with this as restriction.

Step 102:P-CSCF confirms the priority of said voice medium and the priority of said video media according to said indication information;

Wherein, because the SIP INVITE carries voice medium and the indication information that video media has different priority in this MPS session,, can confirm the priority of this voice medium and video media according to this indication information.For example, if indication information has shown the absolute priority of voice medium and video media, then can map directly to the EPS loading priority of each medium by this absolute priority; If indication information has shown the relative priority level of voice medium and video media, then can confirm the EPS loading priority of each medium according to the priority of this relative priority level and this MPS session.

The message of priority that step 103:P-CSCF will comprise priority and the said video media of said voice medium sends to strategy and charging regulation function entity PCRF (Policy and Charging Rules Function; Strategy and charging rule functions); So that said PCRF is according to the priority of said voice medium and the priority of said video media, initiate the carrying of setting up respective priority for said voice medium and said video media.

Wherein, In the dynamic strategy control procedure; The session information of priority that P-CSCF will comprise priority and the video media of said voice medium sends to PCRF through AA-Request message; This AA-Request message has comprised the medium part description field of describing voice medium and video media respectively; This medium part description field comprises the corresponding said voice medium or the precedence information of said video media, and PCRF can be according to the precedence information of said voice medium and video media, for different priority is selected in the carrying of said voice medium and said video media.

Wherein, the voice medium in the MPS session that provides according to this P-CSCF of PCRF and the precedence information of video media are this voice medium and the different priority of video media selection.PCRF also can judge whether the priority of default bearing and IMS signaling bear is suitable according to the highest priority in the priority of the priority of said multimedia priority service session priority, said voice medium and said video media; It is the requirement whether priority of default bearing and IMS signaling bear meets the priority of said MPS session and said voice and video medium; If it is improper; Then initiate the bearing modification process, with the priority of modification default bearing and the priority of IMS signaling bear.If the IMS signaling adopts default bearing to transmit, then the IMS signaling bear is default bearing here.

After PCRF has confirmed the priority of carrying of voice medium and video media; Then initiate to set up the loading establishing process of this voice medium and video media to PDN GW (Packet DataNetwork Gateway grouped data network gateway); By the priority according to the carrying of this voice medium and video media such as PDN GW and SGW (Serving Gateway gateway), for this voice medium and this video media are set up the carrying with different priorities.

Method according to present embodiment; No matter set up in the process in the caller of IMS multimedia priority service session; Or called foundation in the process in the session of IMS multimedia priority service; Can utilize said method; Set up and comprise the voice medium with different priorities and the IMS Multimedia session of video media, make the network side corresponding entity to take different processed strategies, IMS is provided priority service thereby effectively utilize Internet resources more flexibly to medium (for example voice and video) different in the session of IMS multimedia priority service.

The flow chart of a kind of IMS multimedia priority service conversation processing method that Fig. 2 provides for another embodiment of the present invention; This method also is applied to the P-CSCF in the IMS conversation procedure; Be in the MPS conversation procedure after; The priority of voice medium and the priority of video media are made amendment or the switching processing flow process, and please with reference to Fig. 2, this method comprises:

Step 201: in multimedia priority service (MPS) conversation procedure; P-CSCF receiving terminal or other network entities; S-CSCF session updates request (SIP re-INVITE or the SIP UPDATE) message of sending for example, said session updates request message comprises the indication information that the priority of the priority of the voice medium of said MPS session and video media is made amendment or switched;

Wherein, can through this session updates request message directly indicate revise or switch after the voice medium and the priority of video media, also can indicate the priority of voice medium and the priority of video media switch each other through this session updates request message.

When the voice medium after direct indication is revised or switched and the priority of video media; The property column indication voice medium of the media description part of the message body of employing media description agreement (SDP) that can be through said session updates request message and the absolute priority of video media; The property column indication voice medium of the media description part of the message body of employing SDP that also can be through said session updates request message and the relative priority level of video media, the priority header field of message header that can also be through said session updates request message is indicated the priority of voice medium and video media.

When the priority of priority of indicating voice medium and video media is switched each other; The priority of the property column indication voice medium of the media description part of the message body of employing SDP that can be through said session updates request message is switched with the priority of video media each other, and the priority header field of message header that also can be through said session updates request message indicates the priority of voice medium and the priority of video media to switch each other.

Wherein, The priority of the priority header field indication voice medium of the message header through said session updates request message and the priority of video media are switched each other; Can indicate the priority of voice medium and the priority of video media to switch each other through the value that increases the mode of operation of media priority parameter and presentation medium priority thereof at said priority header field; Also can indicate the priority of voice medium and the priority of video media to switch each other, can also indicate the priority of voice medium and the priority of video media to switch each other through the parameter that increases the mode of operation of identification medium priority at said priority header field through the value that increases the mode of operation of media priority operating parameter and presentation medium priority thereof at said priority header field.

Below just illustrate, present embodiment not with this as restriction.

Step 202:P-CSCF is according to said indication information, confirm to revise or switch after priority and the priority of said video media of said voice medium;

Wherein, Because the session updates request message has been indicated the priority of the priority of the voice medium in this MPS session and video media is made amendment or switched; According to this indication information, can confirm to revise or switch after priority and the priority of video media of this voice medium.

Step 203:P-CSCF will comprise said modification or switch after the message of priority of priority and said video media of voice medium send to PCRF; So that said PCRF, initiates modification or switching to the priority of the carrying of the priority of the carrying of said voice medium and said video media according to said modification or the priority of the said voice medium after switching and the priority of said video media.

Wherein, In the dynamic strategy control procedure; P-CSCF will comprise revise and switch after the session information of priority of priority and said video media of said voice medium send to PCRF through AA-Request message; This AA-Request message has comprised the medium part description field of describing voice medium and video media respectively; This medium part description field comprises the corresponding said voice medium or the precedence information of said video media, and PCRF can be that different priority is selected in the carrying of said voice medium and said video media according to the voice medium after said modification or the switching and the precedence information of video media.

Wherein, revise in the MPS session that PCRF provides according to this P-CSCF or switch after voice medium and the precedence information of video media be this voice medium and the different priority of video media selection.PCRF also can be according to multimedia priority service session priority, modification the priority of the voice medium after switching and modification or switch after the priority of video media in the highest priority judge whether the priority of default bearing and IMS signaling bear suitable; It is the requirement whether priority of default bearing and IMS signaling bear meets the priority of said MPS session and said voice and video medium; If it is improper; Then initiate the bearing modification process, with the priority of modification default bearing and the priority of IMS signaling bear.If the IMS signaling adopts default bearing to transmit, then the IMS signaling bear is default bearing here.

PCRF confirmed to revise or switch after the priority of carrying of voice medium and video media after; Then initiate the carrying of voice medium and the bearing modification process of video media to PDN GW; According to this modification or the priority of the carrying of voice medium after switching and video media, revise or switch the priority of carrying of priority and this video media of the carrying of this voice medium by its PDN GW and SGW etc.

Method according to present embodiment; Carrying out in the process of IMS multimedia priority service session; Need make amendment or when switching to the priority of the voice medium of IMS multimedia priority service session and video media; Can utilize said method; The priority of voice medium and video media is made amendment or switched, make the network side corresponding entity to take different processed strategies, IMS is provided priority service thereby effectively utilize Internet resources more flexibly to medium (for example voice and video) different in the session of IMS multimedia priority service.

For the IMS multimedia priority service conversation processing method that provides that makes the embodiment of the invention is known understandable more; Below in conjunction with accompanying drawing; Set up the session of IMS multimedia priority service, the session of the called IMS of foundation multimedia priority service, modification or switch the angle of the priority of voice medium and video media from caller, the method for present embodiment is elaborated.

Fig. 3 is a method of utilizing present embodiment, and the flow chart of IMS multimedia priority service session is set up in caller, and please with reference to Fig. 3, this flow process comprises:

Step 301:UE sets up RRC and connects (RRC Establishment and Service Request).

Wherein, according to 3GPP TS23.401, because the access category of MPS service-user is in 11 to 15 scopes, " the setting up reason " in the RRC connection request is made as high Priority Access (high priority access)." setting up reason " that the portable terminal of receiving as MME (MobilityManagement Entity Mobility Management Entity) is initiated is during for the signaling of high Priority Access; This RRC connection request of MME and eNodeB priority treatment; With respect to the non-priority RRC connection request that other UE initiates, preferentially set up S1 and carry and radio bearer.

Wherein, if UE has been in EMM-CONNECTED (EPS mobile management-connection) state, then this step is not carried out.

Acquiescence or the dedicated bearer of step 302:UE through setting up in advance sends session to P-CSCF and sets up request (SIPINVITE) message.

Wherein, carry MPS code/Identifier (MPS sign indicating number/sign) or MPS input word string in the SIP INVITE, so that P-CSCF therefrom obtains the information of initiating the priority session.

Wherein, This SIP INVITE also indicates the voice medium of this MPS session to have different priority with video media; For example " voice with priority A, video with priority B (voice medium has priority A, and video media has priority B) ".

In one embodiment, can be through SDP media description (media description) property column (" a=") partly of SIP INVITE, the absolute priority of indication voice medium and video media.Here " absolute priority " be meant this session voice medium and video media separately by the priority of network processes, network can be mapped directly to the EPS loading priority of these medium by this priority.For example, the SDP media description of SIP INVITE partly is:

m＝video?49170/2RTP/AVP?31

a＝priority:14

m＝audio?49232RTP/AVP?0

a＝priority:15

In this example, indicate media priority through defining new attribute: attribute-name (attribute) is priority, and its value (value) scope is 0-15.For example, the priority of video media of IMS session (video) and voice medium (audio) is respectively 14 and 15, corresponding respectively priority (Reservation-Priority AVP) 14 and 15 of carrying the IP stream of these medium.

In another embodiment, can be through SDP media description (media description) property column (" a=") partly of SIP INVITE, the relative priority level of indication voice and video media.Here " relative priority level " be meant this session voice medium and video media by the relative priority rank of network processes, network need be confirmed the EPS loading priority of these medium according to the priority of this relative priority level and the IMS session of medium place.For example, the SDP media description of SIP INVITE partly is:

m＝video?49170/2RTP/AVP?31

a＝priority:0

m＝audio?49232RTP/AVP?0

a＝priority:1

In this example; The relative priority level of the video of IMS session and audio is respectively 0 and 1; Network need combine the priority of this IMS session to determine the priority (Reservation-Priority AVP) of the carrying of these medium, and mapping relations as shown in table 1 below are for example arranged:

The IMS session priority	The loading priority of video media	The loading priority of voice medium
			15	14	15
14	13	14
			13	12	13
12	11	12
			11	10	11
10	9	10
			9	8	9
8	7	8
			7	6	7
6	5	6
			5	4	5
4	3	4
			3	2	3
2	1	2
			1	0	1
0	0	0

Table 1

In another embodiment, can pass through Priority (priority) header field of the message header of expansion SIP INVITE, the relative priority level of indication voice medium and video media.For example:

Can define the new parameter of Priority header field: media-priority (medium priority), its value is " voice ", " video ", " data ", or other extended medium type.Illustrate, if video medium (with respect to voice, data medium) have higher priority in the expression IMS MPS session, then can define this new parameter and be: Priority:urgent; Media-priority=video.

Also can define the new parameter of Priority header field: media (medium), its value is " voice ", " video ", " data ", or other extended medium type; And the new parameter of definition Priority header field: q, the priority weighting of presentation medium (priorityweight), or claim priority proportion (priority ratio), relative priority level (relative priority).Illustrate, can define this new parameter and be: Priority:urgent; Video; Q=0.7; Voice; Q=0.3, expression video medium have the priority higher than voice medium, and its weight is respectively 0.7 and 0.3.

Step 303:P-CSCF initiates dynamic strategy control (PCC) process, and session information is issued PCRF through AA-Request message.

Wherein, Session information shows that this caller session comes from the MPS service-user; Comprise voice medium (Audio simultaneously; Be Voice), the precedence information of video media (Video), that is: AA-Request message comprises the Media-Component-Description AVP (medium part description field) that describes Voice, Video respectively, the Reservation-Priority AVP that comprises these medium among the Media-Component-Description AVP is a precedence information.Wherein, the priority of this Voice, Video can be confirmed according to Voice, the indication of Video priority in the SIP INVITE.

Wherein, PCRF can preserve this session information, and relies on incomplete session information (being caller information) to carry the different ARP of selection (Allocation and Retention Priority distributes and the maintenance priority) for the IP-CAN of Voice, Video medium.

Wherein, PCRF is according to the highest priority in MPS session priority, Voice and the Video media priority; Whether the ARP that judges default bearing and IMS signaling bear (acquiescence or dedicated bearer) is suitable; Be the requirement whether priority of default bearing and IMS signaling bear meets the priority of said MPS session and said voice and video medium, if improper, then would be that default bearing and IMS signaling bear are selected new ARP.

Wherein, Voice, Video media priority information in the MPS session that PCRF provides according to P-CSCF are that the IP-CAN of Voice, Video medium carries and selects different ARP.

Wherein, PCRF relies on incomplete session information (being caller information) to carry the different ARP of selection for the IP-CAN of Voice, Video medium in this step 303; But be selection operation; At subsequent step 307, PCRF can rely on complete session information (being caller and called party information) to carry the different ARP of selection for the IP-CAN of Voice, Video medium.

Step 304:P-CSCF transmits the IMS core net with the SIP INVITE.

Step 305: if PCRF judges that the ARP of default bearing and IMS signaling bear (acquiescence or dedicated bearer) is improper in the step 303; It is the requirement that the priority of default bearing and IMS signaling bear does not meet the priority of said MPS session and said voice and video medium; Then PCRF initiates " carry QoS and upgrade the bearing modification process that causes ", revises the ARP of default bearing and IMS signaling bear (acquiescence or dedicated bearer).

Step 306:IMS core net and session far-end are mutual, and P-CSCF receives SIP 183 Progress message.

Wherein, these SIP 183 Progress message are the Temporary Response information of SIP INVITE, and P-CSCF receives this SIP 183Progress message, show that promptly the session far-end has received the session request of setting up, just in the foundation of consulting session medium.

Step 307:P-CSCF authorizes the QoS resource concurrence to play dynamic policy control (PCC) process.

Wherein, identical with step 303 in the dynamic strategy control procedure, P-CSCF can issue PCRF through AA-Request message with session information.

Wherein, PCRF preserves this session information, and discerns affected IP-CAN session, and Voice, Video media priority information are that the IP-CAN of Voice, Video medium carries and selects different ARP in the MPS session that provides according to P-CSCF.

Wherein, identical with step 303 content repeats no more.

Step 308:P-CSCF gives UE with SIP 183 Progress forwards.

After step 309:UE receives SIP 183 Progress message, send SIP PRACK (Temporary Response affirmation) message and give P-CSCF, be forwarded to core net through P-CSCF.

Step 310a/ step 310b:PCRF initiates the voice medium and the video media loading establishing process (Voice Media Bearer Establishment (with priority A)/Video Media Bearer Establishment (withpriority B)) of this MPS session respectively.

Wherein, but two media bearers are set up the process executed in parallel, or combine execution, for example carry the information that comprises two kinds of media bearers in the message simultaneously of setting up.After carrying successfully foundation, the Voice medium will adopt different EPS dedicated bearer transmission with the Video medium, have different ARP, handle by different priorities.

Step 311:IMS caller session is set up process and is continued to carry out, until completion.

Flow process through Fig. 3 can be known; Set up in the process in IMS multimedia priority service session caller; Method according to present embodiment; Can be that voice medium is selected different ARP with video media according to the different priorities of voice medium and video media, handle, improve the user experience of IMS priority service according to different priorities.

In the present embodiment, according to flow process embodiment illustrated in fig. 3, set up the session of IMS multimedia priority service after, if in the MPS conversation procedure, UE initiates the modification of voice medium and video media priority, then this flow process also comprises:

UE sends SIP re-INVITE message to P-CSCF, and promptly session is made amendment to existing IMS MPS.Through the voice medium of this SIP re-INVITE message indication IMS MPS session and the amended priority of video media, concrete indicating means is identical with step 302, repeats no more at this.

In the present embodiment; Identical with treatment S IP INVITE; Can handle this SIPre-INVITE message according to flow process shown in Figure 3; " carry QoS and upgrade the bearing modification process that causes " of being initiated by PCRF then is to revise the ARP that voice medium and video media carry (dedicated bearer).Same, two media bearers are set up process and can be combined execution, for example comprise the modification information of two kinds of media bearers in the bearing modification message simultaneously.

In the present embodiment, according to flow process embodiment illustrated in fig. 3, set up the session of IMS multimedia priority service after, if in the MPS conversation procedure, UE initiates the switching of voice medium and video media priority, then this flow process also comprises:

UE sends SIP re-INVITE message to P-CSCF, and promptly session is made amendment to existing IMS MPS.Switch each other through the voice medium of this SIP re-INVITE message indication IMS MPS session and the priority of video media.

In one embodiment, can directly indicate the priority of revising back medium (voice or video), concrete indicating means is identical with step 302, repeats no more at this.

In another embodiment; Can indicate the priority of voice medium and video medium to switch each other; Be about to the Voice media priority and be revised as B; The video media priority is revised as A, and for example: the SDP media description property column (" a=") partly through SIP re-INVITE message is indicated:

m＝video?49170/2RTP/AVP?31

m＝audio?49232RTP/AVP?0

a＝priority?render

In this example, represent voice medium with its high priority " transference " video media through the property column " a=priority render " of audio medium, promptly the priority of voice medium and video medium is switched each other.

In another embodiment, can pass through the Priority header field of the message header of expansion SIP re-INVITE message, the priority of indication voice and video media is switched each other.For example:

The new parameter of Priority header field: media-priority be can define, value " render " (or " swap ", " switch "), " equal " increased, or the mode of operation of other presentation medium priority.Illustrate, can define this new parameter and be: Priority:urgent; Media-priority=render indicates the priority of voice and video media to switch each other.

Can also define the new parameter of Priority header field: media-priority-operation, value is " render " (or " swap ", " switch "), " equal ", or the mode of operation of other presentation medium priority; Or value is " media-priority-render " (or " media-priority-swap ", " media-priority-switch "), " media-priority-equal ", or the mode of operation of other presentation medium priority.Illustrate, can define this new parameter and be: Priority:urgent; Media-priority-operation=render, perhaps: Priority:urgent; Media-priority-render indicates the priority of voice and video media to switch each other.

Fig. 4 is a method of utilizing present embodiment, the called flow chart of setting up the session of IMS multimedia priority service, and please with reference to Fig. 4, this flow process comprises:

Step 401:P-CSCF receives the SIP INVITE, wherein comprises the priority level of MPS session indication and caller MPS service-user.

Wherein, the voice medium of this MPS session of SIP INVITE indication has different priority with video media, and specifically step 302 is identical among indicating means and Fig. 3, repeats no more at this.

Step 402a:P-CSCF initiates the dynamic strategy control procedure, and the MPS session information is sent to PCRF through AA-Request message, and wherein this MPS session information comprises the priority level of MPS session indication and caller MPS service-user.

Wherein, The precedence information that also comprises Voice, Video medium in this MPS session information; That is: AA-Request message comprises the Media-Component-Description AVP that describes Voice, Video respectively; The Reservation-Priority AVP that comprises these medium among the Media-Component-Description AVP is a precedence information, and the priority of this Voice, Video can be confirmed according to Voice, the indication of Video priority in the SIP INVITE.

Wherein, PCRF can preserve this session information, and relies on incomplete session information (being caller information) to carry the different ARP of selection for the IP-CAN of Voice, Video medium.

Wherein, PCRF judges according to the highest priority in MPS session priority, Voice and the Video media priority whether the ARP of default bearing and IMS signaling bear (acquiescence or dedicated bearer) is suitable; Be the requirement whether priority of default bearing and IMS signaling bear meets the priority of said MPS session and said voice and video medium, if improper then select new ARP.

Wherein, Voice, Video media priority information are that the IP-CAN of Voice, Video medium carries and selects different ARP in the MPS session that provides according to P-CSCF of PCRF.

Wherein, PCRF relies on incomplete session information (caller information) to carry the different ARP of selection for the IP-CAN of Voice, Video medium among this step 402a; But be selection operation; At subsequent step 411, PCRF can rely on complete session information (being caller and called party information) to carry the different ARP of selection for the IP-CAN of Voice, Video medium.

Step 402b:PCRF sends Policy and Charging Rules Provision (strategy provides with charging regulation) message to PDN GW, comprises the suitable qos parameter (comprising ARP) of default bearing and IMS signaling bear (acquiescence or dedicated bearer).

Wherein, If in step 402a; PCRF is that different ARP has been selected in the IP-CAN carrying of Voice, Video medium, then can also comprise (different) ARP of the voice and video medium of this MPS session in the Policy and Charging Rules Provision message.

Step 403:P-CSCF sends the SIP INVITE to PDN GW, also is about to the SIP INVITE and is handed down to PDN GW as descending application layer data, and PDN GW gives S-GW with this forwards.

Wherein, the voice and video medium of this MPS session of indication have different priority in the SIP INVITE, and concrete indicating means is identical with step 401, repeats no more at this.

Step 404: if (S1-U interface) also do not set up the downlink data user plane and communicated by letter between S-GW and the UE, then S-GW sends Downlink Data Notification (downlink data indication) message to MME.

Wherein, the ARP that comprises default bearing and IMS signaling bear in this Downlink Data Notification message.

Step 405:MME sends Paging (paging) message to eNodeB, wherein comprises the priority indication of setting up the MPS session that draws according to above-mentioned ARP.

Step 406:eNodeB sends RRC Paging (paging) message according to priority indication priority treatment Paging (paging) message to UE.

Step 407:UE initiates " UE business of triggering request process ".

Wherein, if UE has been in EMM-CONNECTED (EPS mobile management-connection) state, then step 404,405,406,407 is not carried out.

Step 408: if PCRF judges that the ARP of default bearing and IMS signaling bear (acquiescence or dedicated bearer) is improper among the step 402a; It is the requirement that the priority of default bearing and IMS signaling bear does not meet the priority of said MPS session and said voice and video medium; Then PCRF initiates " carry QoS and upgrade the bearing modification process that causes ", revises the ARP of default bearing and IMS signaling bear (acquiescence or dedicated bearer).

Step 409: after setting up descending S1-U carrying, S-GW issues UE with the SIP INVITE of buffer memory.

Step 410:UE replys SIP 183 Progress (session carry out in) message to P-CSCF, wherein carries media negotiation information.

Step 411:P-CSCF authorizes the QoS resource concurrence to play dynamic policy control process.

Wherein, in the dynamic strategy control procedure, 402a is identical with step, and P-CSCF can issue PCRF through AA-Request message with session information.

Step 412:P-CSCF gives Calling Side with SIP 183 Progress forwards.

Step 413:P-CSCF receives SIP PRACK (Temporary Response affirmation) message from Calling Side.

Step 414:P-CSCF gives UE with SIP PRACK forwards.

Step 415a/ step 415b:PCRF initiates the voice and the video media loading establishing process of this MPS session respectively.

The called session of step 416:IMS is set up process and is continued to carry out, until completion.

Flow process through Fig. 4 can be known; Called the foundation in the process of IMS multimedia priority service session; Method according to present embodiment; Can be that voice medium is selected different ARP with video media according to the different priorities of voice medium and video media, handle, improve the user experience of IMS priority service according to different priorities.

In the present embodiment, according to flow process embodiment illustrated in fig. 4, set up the session of IMS multimedia priority service after, if in the MPS conversation procedure, network side is initiated the modification of voice medium and video media priority, then this flow process also comprises:

P-CSCF receives SIP re-INVITE message, and promptly session is made amendment to existing IMS MPS.Through the voice medium of this SIPre-INVITE message indication IMS MPS session and the amended priority of video media, concrete indicating means is identical with step 401, repeats no more at this.

In the present embodiment, identical with treatment S IP INVITE, can handle this SIPre-INVITE message according to flow process shown in Figure 4, because UE has been in the EMM-CONNECTED state, then step 404-407 does not need to carry out." carry QoS and upgrade the bearing modification process that causes " of being initiated by PCRF then is to revise the ARP that voice medium and video media carry (dedicated bearer).Same, two media bearers are set up process and can be combined execution, for example comprise the modification information of two kinds of media bearers in the bearing modification message simultaneously.

In the present embodiment, according to flow process embodiment illustrated in fig. 4, set up the session of IMS multimedia priority service after, if in the MPS conversation procedure, network side is initiated the switching of voice medium and video media priority, then this flow process also comprises:

P-CSCF receives SIP re-INVITE message, and promptly session is made amendment to existing IMS MPS.Switch each other through the voice medium of this SIPre-INVITE message indication IMS MPS session and the priority of video media.Concrete indicating means and aforementioned UE initiate in the handoff procedure of voice medium and video media priority, and the indicating means of SIP re-INVITE message is identical, repeats no more at this.

In the present embodiment, identical with treatment S IP INVITE, can handle this SIPre-INVITE message according to flow process shown in Figure 4, because UE has been in the EMM-CONNECTED state, then step 404-407 does not need to carry out.

In the present embodiment, because the priority of voice medium and video media is just switched each other, so the priority of default bearing and IMS signaling bear does not need to revise, then step 408 does not need to carry out yet.

After aforementioned flow processing,, carry the ARP of (dedicated bearer) with switching voice medium and video media by " carry QoS and upgrade the bearing modification process that causes " that PCRF initiates.Same, two media bearers are set up process and can be combined execution, for example comprise the modification information of two kinds of media bearers in the bearing modification message simultaneously.

In order to make in the embodiment of the invention, the handoff procedure of UE initiation voice medium and video media priority is clear more understandable, below in conjunction with accompanying drawing this flow process is elaborated.

Fig. 5 carries out in the process for the IMS multimedia priority service session that UE initiates, the flow chart that voice medium and video media priority are switched, and wherein, the ARP modification process that voice medium and video media carry (dedicated bearer) carries out simultaneously.Please with reference to Fig. 5, this flow process comprises:

Step 501:UE is carrying out IMS MPS session, and comprising Voice medium and the priority that priority is A in this IMS MPS session is the video medium of B.

Step 502:UE sends session updates request (SIP re-INVITE) message to P-CSCF, wherein comprises the sign, session priority indication of this IMS MPS session and to the modification information of the priority of Voice medium and video medium in this MPS session.

Wherein, the indication of SIP re-INVITE message is upgraded/is revised the voice medium of this MPS session and the priority of video media.

In one embodiment, can directly indicate the priority of revising the back medium, concrete indicating means is identical with step 302, repeats no more at this.

m＝video?49170/2RTP/AVP?31

m＝audio?49232RTP/AVP?0

a＝priority?render

Step 503:P-CSCF initiates the PCC process to PCRF, promptly through AA-Request message the MPS session information is sent to PCRF.

Wherein, The priority that comprises Voice, Video medium in the MPS session information is switched information; That is: AA-Request message comprises the Media-Component-Description AVP that describes Voice, Video medium respectively; The Reservation-Priority AVP (being loading priority information) that comprises these medium among the Media-Component-Description AVP, this priority is confirmed according to Voice, Video priority switching information in the SIP re-INVITE message.

Wherein, the information of Voice and Video media priority is made amendment respectively to the ARP that the IP-CAN of Voice and Video medium carries in the PCRF MPS session that can provide according to P-CSCF.The concrete modification method is identical with step 303, repeats no more at this.

Step 504:P-CSCF is transmitted to the IMS core net with the SIP INVITE.

Step 505:IMS core net and session far-end are mutual, and P-CSCF receives SIP 183 Progress message.

Wherein, these SIP 183 Progress message are the Temporary Response information of SIP re-INVITE message, and P-CSCF receives this SIP 183 Progress message, shows that promptly the session far-end has received the session updates request, just in the modification of consulting session medium.

Step 506:P-CSCF authorizes the QoS resource concurrence to play dynamic policy control process.

Wherein, identical with step 503 in the dynamic strategy control procedure, P-CSCF can issue PCRF through AA-Request message with session information.

Wherein, PCRF preserves session information and discerns affected IP-CAN session.Voice, Video media priority information are that the IP-CAN of Voice, Video medium carries and selects different ARP in the IMSMPS session that PCRF provides according to P-CSCF.

Wherein, identical with step 503 content repeats no more.

Step 507:P-CSCF gives UE with SIP 183 Progress forwards.

After step 508:UE receives SIP 183 Progress message, send SIP PRACK (Temporary Response affirmation) message and give P-CSCF.

Step 509:P-CSCF gives the IMS core net with SIP PRACK (Temporary Response affirmation) forwards that UE sends.

Step 510:PCRF sends Policy and Charging Rules Provision (strategy provides with charging regulation) message to PDN GW, wherein comprises the ARP of the modification of the IP-CAN carrying of Voice and Video medium in this IMS MPS session.

Step 511:PDN GW sends Update Bearer Request (more new bearer request) message to S-GW, wherein comprises the ARP to the modification of the IP-CAN carrying of Voice in this IMS MPS session and Video medium.

Step 512:S-GW sends Update Bearer Request (more new bearer request) message to MME, wherein comprises the ARP to the modification of the IP-CAN carrying of Voice in this IMS MPS session and Video medium.

Step 513:MME sends Bearer Modify Request (bearing modification request) message to eNodeB, wherein comprises the ARP to the modification of the IP-CAN carrying of Voice in this IMS MPS session and Video medium.

Step 514:eNodeB sends Bearer Modify Response (bearing modification response) message to MME, indicates the ARP of the IP-CAN carrying of Voice and Video medium in this IMS MPS session to revise successfully.

Step 515:MME sends Update Bearer Response (more new bearer response) message to S-GW.

Step 516:S-GW sends Update Bearer Response (more new bearer response) message to PDN GW.

According to above flow process, Voice medium and Video media bearer are handled by amended priority.

Step 517:PDN GW sends Acknowledge IP CAN Session Modification Message (confirming IP-CAN session modification message) to PCRF, indicates the ARP of the IP-CAN carrying of Voice and Video medium in this IMS MPS session to revise successfully.

Step 518:IMS MPS session is proceeded, and this moment, the priority modification of Voice was B, and the priority modification of Video medium is A.

According to handling process shown in Figure 5; Initiate by UE; Accomplished the mutual switching of the priority of voice medium and video media in the IMS MPS conversation procedure; Make network side to take different processed strategies, IMS is provided priority service thereby effectively utilize Internet resources more flexibly to medium (for example voice and video) different in the session of IMS multimedia priority service.

In the present embodiment; UE can be provided with and select the priority of IMS multimedia priority service conversation media; For example; Can be through the video of " setting " menu static configuration IMS multimedia priority service session and the priority of voice medium, this is configured in when the session of IMS multimedia priority service is set up in each initiation and comes into force; Again for example; Can be when the session of IMS multimedia priority service be set up; Through the menu setting video of similar " session setting " and the priority of voice medium, thereby session will adopt the video of setting and the priority of voice medium to set up, and change until conversation end or media priority; Again for example; Can also carry out in the process in the session of IMS multimedia priority service; Revise the priority of video and voice medium through the menu dynamic of similar " modification session attribute "; Revise the back and comes into force, i.e. session will adopt the video of modification and the priority of voice medium to proceed, until conversation end or change media priority once more at once.

In the present embodiment; Network can be provided with and select the priority of IMS multimedia priority service conversation media; For example; Can be according to carrier policy, as different media priorities being set according to application-specific scene (for example earthquake relief work, medical first aid, fire attack) of priority session, network condition (for example network congestion, network congestion processing policy (for example whether allowing to discharge the lower priority session of plurality purpose)) etc.; Again for example, can be signatory according to User Priority, can in priority service is signatory, different media priorities be set like the user; Again for example, can also different media priorities be set according to uploading (for example through the Web interface) user preference to network.

IMS multimedia priority service conversation processing method through present embodiment; Network can be taked different processed strategies to medium (for example voice and video) different in the session of IMS multimedia priority service, thereby effectively utilize Internet resources more flexibly IMS is provided priority service.For example: when network congestion, can support the medium type communication of high priority in the session of IMS priority selectively, discharge the medium type communication of low priority; Simultaneously can also be according to the variation of communication process medium priority telex network demand, on the contrary for example by voice switch to video or, or switch or revise the priority of medium according to network strategy.

The composition frame chart of a kind of IMS multimedia priority service session processing unit that Fig. 6 provides for the embodiment of the invention, please with reference to Fig. 6, this device comprises:

Receiving element 61; Be used for when the session of multimedia priority service is set up; Request message is set up in the session that receiving terminal or other network entities send, and the indication information of priority of priority and video media that request message comprises the voice medium of said multimedia priority service session is set up in said session;

In one embodiment, property column indication voice medium and the absolute priority of video media of media description part of message body of the employing SDP of request message set up in the session that receives of receiving element 61; Perhaps, property column indication voice medium and the relative priority level of video media of media description part of message body of the employing SDP of request message set up in the session that receives of receiving element 61; Perhaps, priority header field indication voice medium and the priority of video media of the message header of request message is set up in the session that receives of receiving element 61.

Wherein, the session that receives of receiving element 61 is set up in the priority header field of message header of request message increases the priority that the media priority parameter is indicated voice medium and video media; Perhaps, the session that receives of first receiving element 61 is set up increases the priority that media parameter and weighted value thereof are indicated voice medium and video media in the priority header field of message header of request message.

Confirm unit 62, be used for, confirm the priority of said voice medium and the priority of said video media according to said indication information;

Transmitting element 63; The message of priority that is used for comprising priority and the said video media of said voice medium sends to PCRF; So that said PCRF is according to the priority of said voice medium and the priority of said video media, for said voice medium and said video media initiate to set up the carrying with respective priority.

PCRF also is used for judging according to said multimedia priority service session priority, the priority of said voice medium and the highest priority of priority of said video media whether the priority of default bearing and IMS signaling bear is suitable; It is the requirement whether priority of default bearing and IMS signaling bear meets the priority of said MPS session and said voice and video medium; If it is improper; Then initiate the bearing modification process, to revise the priority of said default bearing and said IMS signaling bear.

In the present embodiment, the entity that set up to carry can be PDN GW, SGW etc., present embodiment not with this as restriction.

Each part of the device of present embodiment is respectively applied for each step that realizes aforementioned method embodiment shown in Figure 1, owing in preceding method embodiment, each step is specified, repeats no more at this.

IMS multimedia priority service session processing unit through present embodiment; Network can be taked different processed strategies to medium (for example voice and video) different in the session of IMS multimedia priority service, thereby effectively utilize Internet resources more flexibly IMS is provided priority service.

The composition frame chart of other a kind of IMS multimedia priority service session processing unit that Fig. 7 provides for the embodiment of the invention, please with reference to Fig. 7, this device comprises:

Receiving element 71; Be used at IMS multimedia priority service (MPS) conversation procedure; The session updates request message that receiving terminal or other network entities send, said session updates request message comprises the indication information that the priority of the priority of the voice medium of said MPS session and video media is made amendment or switched;

In one embodiment, the property column indication voice medium of the media description of the message body of the employing SDP of the session updates request message that receives of receiving element 71 part and the absolute priority of video media; Perhaps, the property column indication voice medium of the media description of the message body of the employing SDP of the session updates request message that receives of receiving element 71 part and the relative priority level of video media; Perhaps, the priority of the priority header field of the message header of the session updates request message that receives of receiving element 71 indication voice medium and video media.

Wherein, the priority of the property column indication voice medium of the media description of the message body of the employing SDP of the session updates request message that receives of receiving element 71 part and the priority of video media are switched each other; Perhaps, the priority of the priority header field of the message header of the session updates request message that receives of receiving element 71 indication voice medium and the priority of video media are switched each other.

Wherein, the priority header field of the message header of the session updates request message that receives of receiving element 71 value that increases the mode of operation of media priority parameter and presentation medium priority thereof indicates the priority of voice medium and the priority of video media to switch each other; Perhaps, the priority header field of the message header of the session updates request message that receives of receiving element 71 value that increases the mode of operation of media priority operating parameter and presentation medium priority thereof indicates the priority of voice medium and the priority of video media to switch each other; Perhaps, the priority header field of the message header of the session updates request message that receives of receiving element 71 parameter that increases the mode of operation of identification medium priority indicates the priority of voice medium and the priority of video media to switch each other.

Confirm unit 72, be used for, the priority of the said voice medium after definite modification or the switching and the priority of said video media according to said indication information;

Transmitting element 73; Be used for comprising said modification or switch after the message of priority of priority and said video media of voice medium send to PCRF; So that said PCRF, initiates modification or switching to the priority of the carrying of the priority of the carrying of said voice medium and said video media according to said modification or the priority of the said voice medium after switching and the priority of said video media.

Wherein, PCRF also is used for according to the priority of the voice medium after said multimedia priority service session priority, said modification or the switching and said modification or the highest priority of priority of the video media after switching judges whether the ARP of default bearing and IMS signaling bear is suitable; It is the requirement whether priority of default bearing and IMS signaling bear meets the priority of said MPS session and said voice and video medium; If it is improper; Then initiate the bearing modification process, to revise the priority of said default bearing and said IMS signaling bear.

Each part of the device of present embodiment is respectively applied for each step that realizes aforementioned method embodiment shown in Figure 2, owing in preceding method embodiment, each step is specified, repeats no more at this.

The method of describing in conjunction with embodiment disclosed herein or the step of algorithm can be directly with the software modules of hardware, processor execution, and perhaps the combination of the two is implemented.Software module can place the storage medium of any other form known in random asccess memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or the technical field.

Above-described specific embodiment; The object of the invention, technical scheme and beneficial effect have been carried out further explain, and institute it should be understood that the above is merely specific embodiment of the present invention; And be not used in qualification protection scope of the present invention; All within spirit of the present invention and principle, any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1. an IMS multimedia priority service conversation processing method is characterized in that, comprising:

When the session of IMS multimedia priority service is set up; Request message is set up in the session that receiving terminal or other network entity send, and the indication information of priority of priority and video media that request message comprises the voice medium of said multimedia priority service session is set up in said session;

According to said indication information, confirm the priority of said voice medium and the priority of said video media;

The message of priority that will comprise priority and the said video media of said voice medium sends to strategy and charging regulation function entity PCRF; So that said PCRF is according to the priority of said voice medium and the priority of said video media, for said voice medium and said video media initiate to set up the carrying with respective priority.

2. method according to claim 1 is characterized in that, the indication information of priority of priority and video media that request message comprises the voice medium of said multimedia priority service session is set up in said session, comprising:

Set up property column indication voice medium and the absolute priority of video media of media description part of message body of the employing media description agreement of request message through said session; Perhaps

Set up property column indication voice medium and the relative priority level of video media of media description part of message body of the employing media description agreement of request message through said session; Perhaps

The priority header field of setting up the message header of request message through said session is indicated the priority of voice medium and video media.

3. method according to claim 2 is characterized in that, the priority header field of setting up the message header of request message through said session is indicated the priority of voice medium and video media, is specially:

Through increasing the priority that the media priority parameter is indicated voice medium and video media at said priority header field; Perhaps

Through increase the priority that media parameter and weighted value thereof are indicated voice medium and video media at said priority header field.

4. according to each described method of claim 1 to 3; It is characterized in that; Said PCRF is according to the priority of said voice medium and the priority of said video media, initiates to set up the carrying with respective priority for said voice medium and said video media, comprising:

PCRF judges according to the highest priority in the priority of the priority of said multimedia priority service session priority, said voice medium and said video media whether the priority of priority and IMS signaling bear of default bearing is suitable;

If improper, then initiate the bearing modification process, with the priority of revising said default bearing and the priority of said IMS signaling bear.

5. IMS multimedia priority service conversation processing method is characterized in that said method comprises:

In IMS multimedia priority service conversation procedure; The session updates request message that receiving terminal or other network entities send, said session updates request message comprises the indication information that the priority of the priority of the voice medium of said multimedia priority service session and video media is made amendment or switched;

According to said indication information, the priority of the said voice medium after definite modification or the switching and the priority of said video media;

To comprise said modification or switch after the message of priority of priority and said video media of voice medium send to strategy and charging regulation function entity PCRF; So that said PCRF, initiates modification or switching to the priority of the carrying of the priority of the carrying of said voice medium and said video media according to said modification or the priority of the said voice medium after switching and the priority of said video media.

6. method according to claim 5 is characterized in that, said session updates request message comprises the indication information that the priority of the voice medium priority of said multimedia priority service session and video media is made amendment or switched, and comprising:

The property column indication voice medium of the media description part of the message body of the employing media description agreement through said session updates request message and the absolute priority of video media; Perhaps

The property column indication voice medium of the media description part of the message body of the employing media description agreement through said session updates request message and the relative priority level of video media; Perhaps

The priority header field indication voice medium of the message header through said session updates request message and the priority of video media; Perhaps

The priority of the property column indication voice medium of the media description part of the message body of the employing media description agreement through said session updates request message and the priority of video media are switched each other; Perhaps

The priority of the priority header field indication voice medium of the message header through said session updates request message and the priority of video media are switched each other.

7. method according to claim 6 is characterized in that, the priority of the priority header field indication voice medium of the message header through said session updates request message and the priority of video media are switched each other, comprising:

Value through increase the mode of operation of media priority parameter and presentation medium priority thereof at said priority header field indicates the priority of voice medium and the priority of video media to switch each other; Perhaps

Value through increase the mode of operation of media priority operating parameter and presentation medium priority thereof at said priority header field indicates the priority of voice medium and the priority of video media to switch each other; Perhaps

Parameter through increase the mode of operation of identification medium priority at said priority header field indicates the priority of voice medium and the priority of video media to switch each other.

8. according to each described method of claim 5 to 7; It is characterized in that; Said PCRF is according to said modification or the priority of the said voice medium after switching and the priority of said video media; Initiation comprises the modification or the switching of the priority of the carrying of the priority of the carrying of said voice medium and said video media:

According to said multimedia priority service session priority, said modification or the priority of the voice medium after switching and said modification or switch after the priority of video media in the highest priority judge whether the priority of priority and IMS signaling bear of default bearing suitable;

9. IMS multimedia priority service session processing unit is characterized in that said device comprises:

Receiving element; Be used for when the session of IMS multimedia priority service is set up; Request message is set up in the session that receiving terminal or other network entities send, and the indication information of priority of priority and video media that request message comprises the voice medium of said multimedia priority service session is set up in said session;

Confirm the unit, be used for, confirm the priority of said voice medium and the priority of said video media according to said indication information;

Transmitting element; The message of priority that is used for comprising priority and the said video media of said voice medium sends to strategy and charging regulation entity PCRF; So that said PCRF is according to the priority of said voice medium and the priority of said video media, for said voice medium and said video media initiate to set up the carrying with respective priority.

10. IMS multimedia priority service session processing unit is characterized in that said device comprises:

Receiving element; Be used at IMS multimedia priority service conversation procedure; The session updates request message that receiving terminal or other network entities send, said session updates request message comprises the indication information that the priority of the priority of the voice medium of said multimedia priority service session and video media is made amendment or switched;

Transmitting element; Be used for comprising said modification or switch after the message of priority of priority and said video media of voice medium send to strategy and charging regulation function entity PCRF; So that said PCRF, initiates modification or switching to the priority of the carrying of the priority of the carrying of said voice medium and said video media according to said modification or the priority of the said voice medium after switching and the priority of said video media.