CN107666689A - Bandwidth adjusting method, equipment and system in a kind of video communication - Google Patents

Bandwidth adjusting method, equipment and system in a kind of video communication Download PDF

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Publication number
CN107666689A
CN107666689A CN201610601864.8A CN201610601864A CN107666689A CN 107666689 A CN107666689 A CN 107666689A CN 201610601864 A CN201610601864 A CN 201610601864A CN 107666689 A CN107666689 A CN 107666689A
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China
Prior art keywords
video
bandwidth
video communication
tastes
actual value
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Granted
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CN201610601864.8A
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Chinese (zh)
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CN107666689B (en
Inventor
柳亮亮
时书锋
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CN201610601864.8A priority Critical patent/CN107666689B/en
Priority to PCT/CN2017/091862 priority patent/WO2018019102A1/en
Publication of CN107666689A publication Critical patent/CN107666689A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/643—Communication protocols
    • H04N21/6437—Real-time Transport Protocol [RTP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18—Negotiating wireless communication parameters
    • H04W28/20—Negotiating bandwidth
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/14—Systems for two-way working
    • H04N7/141—Systems for two-way working between two video terminals, e.g. videophone

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Quality & Reliability (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Telephonic Communication Services (AREA)

Abstract

Bandwidth adjusting method, equipment and system in a kind of video communication, for being managed according to real experiences of the video communication side in video communication to the process of communication.This method includes：Policy control functions entity obtains the video tastes actual value of video communication side；The video tastes actual value is used to indicate real experiences of the video communication side in video communication is carried out；If the video tastes actual value and the video tastes reference value of the video communication side are inconsistent, the policy control functions entity determines target bandwidth according to the current bandwidth of the video tastes reference value or the video communication side；The video tastes reference value is used to be designated as experience of the default video communication side of the video communication side in video communication；The current Bandwidth adjustment is the target bandwidth by the policy control functions entity instruction video communication side.

Description

Bandwidth adjusting method, equipment and system in a kind of video communication
Technical field
The present invention relates to communication technical field, bandwidth adjusting method, equipment in more particularly to a kind of video communication And system.
Background technology
In the prior art, video communication, for voice communication, video communication can be established between terminal device The experience of user can more be lifted.It following is a brief introduction of and how to establish video communication between terminal device, wherein, because being to build Vertical video communication, therefore the terminal device at video communication both ends is referred to as video communication initiator and video communication reception Side：
Direction Proxy-Call Session Control Function (Proxy-Call Session Control are initiated in video communication Function, P-CSCF) send and invite (INVITE) message, to initiate to call to video communication reception side.P-CSCF will be received INVITE message be sent to serving session control function (Serving-Call Session Control Function, S- CSCF), the INVITE message is transmitted to the network of the side where video communication reception side, video communication reception side by S-CSCF The network of the side at place returns to response message after the treatment, to S-CSCF, and the response message is transmitted to P- by S-CSCF After CSCF, P-CSCF receive the response message, to "Policy and Charging Rules Function (Policy And Charging Rules Function, PCRF) issue certification, authorization requests (Authentication, Authorization Request, AAR) disappear Breath, to establish the dedicated bearing of this video calling, after PCRF receives AAR message, to packet data network gateway (Packet Data Network Gateway, P-GW) re-authorization request (Re-Auth Request, RAR) message is sent, so as to which P-GW is received Dedicated bearing can be established with video communication initiator after to RAR message, after dedicated bearing foundation, P-GW is rung by re-authorization Answer (Re-Auth Answer, RAA) message informing PCRF, PCRF that result reported into P-CSCF, P-CSCF regarding reception again The response message that the network of side where frequency communication receiver is sent is sent to video communication initiator, leads to so as to establish video Believe the video communication between initiator and video communication reception side.
But current network is only responsible for completing the video communication established between two terminal devices, can not but combine user Situation the process of communication is managed.
The content of the invention
The embodiment of the present invention provides bandwidth adjusting method, equipment and the system in a kind of video communication, for basis Real experiences of the video communication side in video communication are managed to the process of communication.
First aspect, there is provided the bandwidth adjusting method in a kind of video communication, this method include：Policy control functions Entity receives the video tastes actual value of video communication side, and video tastes actual value is used to indicate that video communication side is carrying out video Real experiences in communication process.If video tastes actual value and the video tastes reference value of video communication side are inconsistent, strategy Control function entity determines target bandwidth according to the current bandwidth of video tastes reference value or video communication side.Video tastes refer to It is worth the experience for being designated as default video communication side of video communication side in video communication.
In the embodiment of the present invention, policy control functions entity can be obtained ahead of time as the default video tastes in video communication side Reference value, that is, it is the default experience in video communication side to obtain, and policy control functions entity can also obtain video communication side and exist The video tastes actual value of real experiences in video communication, i.e. video communication side, then policy control functions entity can be with Video tastes actual value and video tastes reference value are compared, if both are inconsistent, this includes two kinds of situations, the first feelings Condition is that video tastes actual value is less than video tastes reference value, and second of situation is that video tastes actual value is joined more than video tastes Value is examined, in both cases, all shows real experiences and the video communication side experienced during video video communication side The experience that should be experienced is inconsistent, and video tastes reference value is set in advance, it may be possible to wishes what is had in video communication side Experience, or be probably the experience with relatively good effect, therefore policy control functions entity can indicates video communication The current bandwidth in adjustment video communication side of side, with cause as far as possible real experiences of the video communication side in video communication with for The default experience in video communication side is consistent, improves video communication quality, also meets the actual demand of video communication side.That is, pass through Technical scheme provided in an embodiment of the present invention can be with management and control video communication, can be according to the actual body of user in communication process Adjustment bandwidth is tested, can preferably ensure network quality.
With reference in a first aspect, in the first possible implementation of first aspect, policy control functions entity according to Video tastes reference value determines target bandwidth, can be accomplished by the following way：Policy control functions object query prestores Video tastes reference value and bandwidth between mapping relations, bandwidth corresponding with video tastes reference value is defined as object tape It is wide.
Policy control functions entity need to only prestore the mapping relations between video tastes reference value and bandwidth, it is possible to By inquire about the mapping relations obtain with the video tastes reference value of video communication side corresponding to bandwidth, determine target bandwidth Mode is relatively simple, it is easy to accomplish.Wherein, policy control functions entity can store a mapping relations, and all videos lead to Letter side can determine target bandwidth by the mapping relations, and the information of policy control functions entity storage is less, saves Memory space.Or policy control functions entity can also store a video respectively for different video communication sides and lead to Mapping relations between the video tastes reference value and bandwidth of letter side, then can be by different for different video communication sides Mapping relations determine target bandwidth, it is determined that result it is more accurate.
With reference in a first aspect, in second of possible implementation of first aspect, policy control functions entity according to The current bandwidth in video communication side determines target bandwidth, can be accomplished by the following way：Policy control functions object query is deposited The bandwidth of storage, memory bandwidth minimum with current bandwidth difference on Bandwidth adjustment direction in the bandwidth of storage is defined as mesh Marker tape is wide.Bandwidth adjustment direction is the tune to current bandwidth determined according to video tastes actual value and video tastes reference value Perfect square is to Bandwidth adjustment direction is the direction for improving current bandwidth or the direction for reducing current bandwidth.
Policy control functions entity need to only prestore some bandwidth, it is possible to determine object tape from the bandwidth of storage Width, and determine target bandwidth when also contemplate Bandwidth adjustment direction so that it is determined that bandwidth it is more suitable.Wherein, policy control work( Can entity can store a mapping relations, all video communication sides can be stored same by policy control entity Bandwidth determines target bandwidth, and the bandwidth of policy control functions entity storage is less, save memory space.Or strategy control Functional entity processed can also store different bandwidth respectively for different video communication sides, then for different video communication sides Target bandwidth can be determined by different bandwidth, it is determined that result it is more accurate.
With reference in a first aspect, in the third possible implementation of first aspect, policy control functions entity according to The current bandwidth in video communication side determines target bandwidth, can be accomplished by the following way：Policy control functions entity will be current Bandwidth be added with pre-set bandwidths, obtain target bandwidth.Or, policy control functions entity is by current bandwidth and preset percentage It is multiplied, obtains target bandwidth.
In this implementation, policy control functions entity need to only prestore pre-set bandwidths or preset percentage, i.e., Target bandwidth is can obtain, mode is relatively simple.Wherein, policy control functions entity can store a pre-set bandwidths or default hundred Divide ratio, all video communication sides can determine target bandwidth, strategy control by the pre-set bandwidths or the preset percentage The information of functional entity storage processed is less, saves memory space.Or policy control functions entity can also be directed to it is different Video communication side stores different pre-set bandwidths or the preset percentage respectively, then can pass through for different video communication sides Different pre-set bandwidths or the preset percentage determine target bandwidth, it is determined that result it is more accurate.
Any of the third possible implementation with reference to first aspect to first aspect possible implementation, In the 4th kind of possible implementation of first aspect, video tastes reference value is vMOS reference values, accordingly, video tastes Actual value is vMOS actual values.Or, video tastes reference value is video source quality references value, accordingly, video tastes actual value For video source quality actual value.
It is to be compared corresponding parameter when video tastes actual value and video tastes reference value are compared, Such as be compared vMOS actual values and vMOS reference values, and vMOS actual values and video source quality references value can not be carried out Compare, to avoid confusion.Therefore this setup in the embodiment of the present invention conveniently enters actual value and corresponding reference value Row compares.
Any of the 4th kind of possible implementation with reference to first aspect to first aspect possible implementation, In the 5th kind of possible implementation of first aspect, if current bandwidth is less than target bandwidth, in policy control functions Entity indicates video communication side by current Bandwidth adjustment for before target bandwidth, policy control functions entity can also be to data Whether gateway sends probe requests thereby, support the current bandwidth in video communication side being promoted to target bandwidth with detection data gateway. Target bandwidth is carried in probe requests thereby.After probe requests thereby is sent, policy control functions entity receives the pin that data gateway is sent Probe response to probe requests thereby.In this case, policy control functions entity indicates video communication side by current bandwidth Target bandwidth is adjusted to, can be accomplished by the following way：If probe response is used to indicate that data gateway is supported video communication Fang Dangqian bandwidth is promoted to target bandwidth, then current Bandwidth adjustment is by policy control functions entity instruction video communication side Target bandwidth.
If data gateway is not supported to lift bandwidth, and video communication initiator directly carries out the operation of bandwidth lifting, then Failure is likely to, therefore can first determine whether data gateway is supported to lift bandwidth in the embodiment of the present invention, it is determined that data Gateway can be supported to carry out the lifting operation of bandwidth after lifting bandwidth again, can reduce the probability of bandwidth lifting failure, avoid Equipment flogs a dead horse.
It is noted that if necessary to reduce bandwidth, it is wide that even current band is wider than object tape, then can be without detection Data gateway, because bandwidth declines, the equipment of bearing bed necessarily disclosure satisfy that requirement, in general without detection.
Any of the 5th kind of possible implementation with reference to first aspect to first aspect possible implementation, In the 6th kind of possible implementation of first aspect, if video tastes actual value and the reference of the video tastes of video communication side It is worth inconsistent, policy control functions entity determines object tape according to the current bandwidth of video tastes reference value or video communication side Width, it can be accomplished by the following way：If policy control functions entity determines the video body for the video communication side that continuous N time obtains It is inconsistent with video tastes reference value to test actual value, then policy control functions entity leads to according to video tastes reference value or video The current bandwidth in letter side determines target bandwidth.
In order that the adjustment obtained for bandwidth is more accurate, policy control functions entity can be it is determined that continuous N time obtains Video communication initiator video tastes actual value all with video tastes reference value it is inconsistent when indicate again video communication initiate Side adjusts current bandwidth, effectively to prevent reforming phenomena.M can be positive integer, and M specific value can be by policy control work( Energy entity rule of thumb or according to network condition is set, and for example, 3,3 are also not necessarily limited to certainly.
Second aspect, there is provided a kind of policy control functions entity, the policy control functions entity includes memory, communication connects Mouth and processor, memory and communication interface are connected with processor.Wherein, memory is used for store program codes.Communication connects Mouthful, for receiving the video tastes actual value of video communication side.Video tastes actual value is used to indicate that video communication side is being carried out Real experiences in video communication.Processor is used to call the program code that memory is stored, if video tastes are actual Value and the video tastes reference value of video communication side are inconsistent, according to the current bandwidth of video tastes reference value or video communication side Target bandwidth is determined, and indicates that current Bandwidth adjustment is target bandwidth by video communication side.Video tastes reference value is used to refer to It is shown as experience of the default video communication side of video communication side in video communication.
With reference to second aspect, in the first possible implementation of second aspect, processor is used for according to video body Test reference value and determine target bandwidth, can be accomplished by the following way：The video tastes reference value that processor inquiry prestores Mapping relations between bandwidth, bandwidth corresponding with video tastes reference value is defined as target bandwidth.
With reference to second aspect, in second of possible implementation of second aspect, processor is used to be led to according to video The current bandwidth in letter side determines target bandwidth, can be accomplished by the following way：The bandwidth of processor inquiry storage, by storage Memory bandwidth minimum with current bandwidth difference on Bandwidth adjustment direction is defined as target bandwidth in bandwidth.Bandwidth adjustment side To the adjustment direction to current bandwidth to be determined according to video tastes actual value and video tastes reference value, Bandwidth adjustment side The direction of the bandwidth current to the direction for the current bandwidth of raising or reduction.
With reference to second aspect, in the third possible implementation of second aspect, processor is used to be led to according to video The current bandwidth in letter side determines target bandwidth, can be accomplished by the following way：Processor is by current bandwidth and pre-set bandwidths It is added, obtains target bandwidth.Or, current bandwidth is multiplied by processor with preset percentage, target bandwidth is obtained.
Any of the third possible implementation with reference to second aspect to second aspect possible implementation, In the 4th kind of possible implementation of second aspect, video tastes reference value is vMOS reference values, accordingly, video tastes Actual value is vMOS actual values.Or, video tastes reference value is video source quality references value, accordingly, video tastes actual value For video source quality actual value.
Any of the 4th kind of possible implementation with reference to second aspect to second aspect possible implementation, In the 5th kind of possible implementation of second aspect, if current bandwidth is less than target bandwidth, communication interface is additionally operable to： Before current Bandwidth adjustment is target bandwidth by processor instruction video communication side, probe requests thereby is sent to data gateway, Whether support the current bandwidth in video communication side being promoted to target bandwidth with detection data gateway.Target is carried in probe requests thereby Bandwidth.After probe requests thereby is sent, communication interface is additionally operable to receive the probe response for probe requests thereby that data gateway is sent. Processor is target bandwidth for indicating video communication side by current Bandwidth adjustment, can be accomplished by the following way：It is if logical The probe response of letter interface is used to indicate that data gateway is supported the current bandwidth in video communication side being promoted to target bandwidth, Then current Bandwidth adjustment is target bandwidth by instruction video communication side.
Any of the 5th kind of possible implementation with reference to second aspect to second aspect possible implementation, In the 6th kind of possible implementation of second aspect, if processor is used for regarding for video tastes actual value and video communication side Frequency experience reference value is inconsistent, and target bandwidth is determined according to the current bandwidth of video tastes reference value or video communication side, can be with It is accomplished by the following way：If it is determined that the video tastes actual value for the video communication side that continuous N time obtains is joined with video tastes Examine that value is inconsistent, then target bandwidth is determined according to the current bandwidth of video tastes reference value or video communication side.
The third aspect, there is provided a kind of video communication system, the video communication system includes medium processing device and strategy is controlled Functional entity processed.Wherein, medium processing device is used for the video tastes actual value for calculating video communication side, and video tastes are real Actual value is sent to policy control functions entity.Video tastes actual value is used to indicate that video communication side is carrying out video communication In real experiences.Policy control functions entity is used for the video tastes actual value for receiving medium processing device transmission, if video It is inconsistent to experience the video tastes reference value of actual value and video communication side, is worked as according to video tastes reference value or video communication side Preceding bandwidth determines target bandwidth, and current Bandwidth adjustment is target bandwidth by instruction video communication side.Video tastes refer to It is worth the experience for being designated as default video communication side of video communication side in video communication.
In the embodiment of the present invention, the video tastes actual value of video communication side can be sent to strategy by medium processing device Control function entity, then policy control functions entity can be by video tastes actual value and the progress of default video tastes reference value Compare, if both are inconsistent, this includes two kinds of situations, and the first situation is that video tastes actual value refers to less than video tastes Value, second of situation is that video tastes actual value is more than video tastes reference value, in both cases, all shows video communication The experience that the real experiences and video communication side that side experiences during video should be experienced is inconsistent, and video tastes refer to Value is set in advance, it may be possible to which video communication side wishes the experience having, or is probably the body with relatively good effect Test, therefore the bandwidth that adjustment video communication side of policy control functions entity can instruction video communication side is current, to make as far as possible It is consistent with for the default experience in video communication side to obtain real experiences of the video communication side in video communication, raising video leads to Believe quality, also meet the actual demand of video communication side.That is, can be regarded by technical scheme provided in an embodiment of the present invention with management and control Frequency communication process, bandwidth can be adjusted according to the real experiences of user in communication process, can preferably ensure network quality.And Management and control process is by medium processing device and policy control functions entity it is achieved that the network element being related to is less, and realization is more Simply.
Fourth aspect, there is provided another policy control functions entity, the policy control functions entity can include being used to hold The functional unit of the method for any possible implementation of row first aspect or first aspect.
5th aspect, the embodiments of the invention provide a kind of computer-readable storage medium, for saving as above-mentioned policy control Computer software instructions used in functional entity, it, which is included, is used to perform above-mentioned aspect designed by policy control functions entity Program.
In the embodiment of the present invention, by the way that the video tastes actual value of user in communication process and video tastes reference value are entered Row compares, can with management and control video communication, cause as far as possible real experiences of the video communication side in video communication with for The default experience in video communication side is consistent, improves video communication quality, also meets the actual demand of video communication side.
In the present invention, the title such as policy control functions entity, video communication side and medium processing device to equipment in itself not Form and limit, in practical implementations, these equipment can occur with other titles.As long as the function of each equipment and class of the present invention Seemingly, belong within the scope of the claims in the present invention and its equivalent technologies.
The aspects of the invention or other aspects can more straightforwards in the following description.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, it will make below to required in the embodiment of the present invention Accompanying drawing is briefly described, it should be apparent that, accompanying drawing described below is only some embodiments of the present invention, for For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings Accompanying drawing.
The flow chart that it is the process that two video communication sides establish video communication in the prior art that Fig. 1, which is,；
Fig. 2 is a kind of system architecture diagram of application of the embodiment of the present invention；
Fig. 3 A- Fig. 3 C are several system architecture diagrams of application of the embodiment of the present invention；
Fig. 4 is a kind of structural representation of computer equipment provided in an embodiment of the present invention；
Fig. 5 is a kind of flow chart of the bandwidth adjusting method in video communication provided in an embodiment of the present invention；
Fig. 6 is a kind of flow chart of the bandwidth adjusting method in video communication provided in an embodiment of the present invention；
Fig. 7 is a kind of structural representation of policy control functions entity provided in an embodiment of the present invention；
Fig. 8 is a kind of structural representation of video communication system provided in an embodiment of the present invention.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is Part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art The every other embodiment obtained under the premise of creative work is not made, belong to the model of protection of the embodiment of the present invention Enclose.
The techniques described herein may be used in various communication systems, such as forth generation GSM (4G) or the next generation Communication system, such as Long Term Evolution (Long Term Evolution, LTE) system, and other such communication systems.
Hereinafter, the part term in the embodiment of the present invention is explained, in order to skilled artisan understands that.
1) mean subjective scoring (Mean Opinion Score, MOS).The traditional speech business of telecommunications and data service are all There is a set of more complete quality index evaluation system.International Telecommunication Union (International Telecommunications Union, ITU-T) the important indicator MOS for weighing communication system voice quality is given, according to this Individual index can be assessed the speech network quality of operator.The principal element for influenceing MOS has the following aspects：Voice Encoding scheme, transmission, compression etc., operator are horizontal so as to lift MOS to optimize the network of oneself with this.
2) video mean subjective scoring (Video Mean Opinion Score, vMOS).With reference to voice MOS, industry carries Video vMOS concept is gone out, the experience of video is watched for characterizing user.
3) VoLTE (is based on internet protocol multimedia subsystem (Internet Protocol Multimedia Subsystem, IMS) speech business).VoLTE is a kind of Internet protocol (Internet Protocol, IP) data transfer skill Data and unification of the speech business under consolidated network can be achieved on 4G networks in art, whole service bearers.In other words, in 4G Under network, the data service of high-speed can be not only provided, while the audio/video communication of high quality can also be provided, and high quality Audio/video communication just need to be realized by means of VoLTE technologies.Because discussion of the embodiment of the present invention be video communication mistake Journey, therefore the embodiment of the present invention can be realized by means of VoLTE technologies.Certain embodiment of the present invention is not limited to VoLTE technologies, manages By upper, every system that can provide video communication service can realize the method that the embodiment of the present invention is provided, such as this Inventive embodiments can also be by means of being realized based on IMS fixed network.
4) policy control functions entity, it is that can carry out the network element of strategic decision-making and charging control function, for example, PCRF, Or can also be other possible network elements in following 5G systems, the embodiment of the present invention is studied carefully for policy control functions entity Unexpectedly realized and be not restricted by which kind of network element.Wherein, if policy control functions entity is PCRF, PCRF is mainly used in offer group PCRF functions in net, it is the policy decision point in network.PCRF can be based on signing service, network configuration and user and access skill Art etc. carries out the strategic decision-making of various dimensions, and by result notification strategy and charge execution function (the Policy and of decision-making Charging Enforcement Function, PCEF) entity implementation.
5) video communication side, for example, user equipment.Wherein, user equipment refers to provide a user voice and/or data Connective equipment, such as the portable equipment with wireless connecting function can be included or be connected to radio modem Processing equipment.The user equipment can be led to through wireless access network (Radio Access Network, RAN) with core net Letter, voice and/or data are exchanged with RAN.The user equipment can include (User Equipment, UE), wireless terminal device, Mobile terminal device, subscri er unit (Subscriber Unit), subscriber station (Subscriber Station), movement station (Mobile Station), mobile station (Mobile), distant station (Remote Station), access point (Access Point, AP), RTU (Remote Terminal), access terminal equipment (Access Terminal), subscriber terminal equipment (User Terminal), user agent (User Agent) or subscriber's installation (User Device) etc..For example, it can include Mobile phone (or being " honeycomb " phone), there is the computer of mobile terminal device, portable, pocket, hand-held, calculating Built in machine or vehicle-mounted mobile device.For example, PCS (Personal Communication Service, PCS) phone, wireless phone, Session initiation Protocol (SIP) phone, WLL (Wireless Local Loop, WLL) Stand, the equipment such as personal digital assistant (Personal Digital Assistant, PDA).
6) P-CSCF, the P-CSCF functions in networking can be provided, supported from session initiation protocol (Session Initiation Protocol, SIP) session information is obtained in message and PCRF is handed down to by Rx interface, regarded for establishing sound The dedicated bearing of frequency communication.
7) gateway (Serving GateWay, S-GW), can provide the S-GW functions in networking.S-GW is packet The gateway node of core net (Evolved Packet Core, EPC) network, provided substantially to access the LTE user of EPC networks Bearing function, its major function provided includes user's access and bearer context processing, IP address distribution, packet moving Dynamic route and encapsulation between net and external data network etc..The function that S-GW is provided in EPC networks is equivalent to service general point Group wireless service technical support node (Serving General Packet Radio Service Support Node, SGSN) the function of being provided in packet switch (Packet Switch, PS) network.
8) P-GW, there is provided the P-GW functions in networking.Gateway between the Packet Data Network (PDN) of EPC networks and outside Equipment, there is provided route and encapsulation of the packet between mobile network and external data network.From the viewpoint of extranets, P-GW is just It seem the router of all User IPs in addressable mobile network.The function that P-GW is provided in EPC networks is equivalent to gateway The function that GPRS Support Node (Gateway GPRS Support Node, GGSN) provides in PS networks.
9) video tastes actual value, for indicating real experiences of the video communication side in video communication is carried out.Depending on Frequency experience actual value can include at least one of vMOS actual values and video source quality (sQuality) actual value.
Video tastes reference value, for being designated as default video communication side of video communication side in video communication Experience.Video tastes reference value can include at least one of vMOS reference values and video source quality references value.
Wherein, if video tastes reference value includes vMOS reference values, video tastes actual value includes vMOS actual values；If Video tastes reference value includes video source quality references value, then video tastes actual value includes video source quality actual value, so Also allow for the two being compared.And if video tastes actual value includes vMOS actual values and video source quality actual value, depending on Frequency experience reference value can include vMOS reference values or video source quality references value, you can to select one of actual value It is compared with corresponding reference value, is all compared without two actual values and corresponding reference value, it is more convenient, The result avoided the occurrence of includes confusion caused by various possibilities.
In addition, video communication side can refer to video communication initiator, or can also be video communication reception side, when So, here video communication initiator and video communication reception side is the concept during video communication foundation.In video After connection setup, the status of two video communication sides should be equality.In video communication, two video communication sides It is likely to receive the information that other side sends, is also likely to send information to other side.
10) term in the embodiment of the present invention " system " and " network " can be used interchangeably." multiple " refer to two or two More than individual."and/or", describes the incidence relation of affiliated partner, and expression may have three kinds of relations, can be with for example, A and/or B Represent：Individualism A, while A and B be present, these three situations of individualism B.In addition, character "/", unless otherwise specified, one As represent forward-backward correlation object be a kind of relation of "or".
The process that mesh the first two video communication side establishes video communication is introduced first below, refers to Fig. 1.
S101, video communication initiator send request (INVITE) by default bearer and (provide (Offer)) message, to exhale Cry video communication reception side.Wherein, INVITE (Offer) message that video communication initiator sends is transmitted directly to P-CSCF, Then P-CSCF receives INVITE (Offer) message.
S102, P-CSCF forward INVITE (Offer) message receive what P-CSCF was sent to S-CSCF, then S-CSCF After INVITE (Offer) message, the net for side INVITE (Offer) message being sent to where video communication reception side Network, the processing procedure of the network of the side where video communication reception side is not shown in Fig. 1.
The network of side where S103, video communication reception side sends 183 (responses after being disposed to S-CSCF (Answer)) message, S-CSCF receive 183 (Answer) message that the network of the side where video communication reception side is sent Afterwards, 183 (Answer) message is transmitted to P-CSCF, then P-CSCF receives 183 (Answer) message.Wherein, video leads to Believe and side where video communication reception side is carried in 183 (Answer) message that the network of the side where recipient returns Session Description Protocol (Session Description Protocol, SDP) information of network.
After S104, P-CSCF receive 183 (Answer) message, AAR message is issued to PCRF, to establish this video communication Dedicated bearing, then PCRF receive the AAR message.Media description information can be included in AAR message, can in media description information With information such as the bandwidth requirement including this video communication and medium types.
S105, PCRF join according to the QoS (Quality of Service, QoS) obtained from AAR message The subscription information of number and video communication initiator do strategic decision-making, provide the QoS authorized for video communication initiator, and pass through The QoS of the mandate provided is sent to P-GW by RAR message, then P-GW receives the RAR message.Wherein, some keys that QoS includes Parameter has QoS classification identification code (QoS Class Identifier, QCI), address resolution protocol (Address Resolution Protocol, ARP), ensure bit rate (Guaranteed Bit Rate, GBR) and maximum bit rate (max bit Rate, MBR) etc..
S106, P-GW are sent to video communication initiator establishes carrying request (Create Bearer Request) message, To establish the dedicated bearing of this video communication, then video communication initiator receives the bearing request message.
S107, video communication are initiated direction P-GW transmission foundation carrying responses (Create Bearer Response) and disappeared Breath, then P-GW receive that video communication initiator sends this establish bearing response message, confirm that the proprietary of this video communication is held Load has built up.
S108, P-GW to PCRF send RAA message, to inform the dedicated bearing of this video communication of PCRF it has been established that Then PCRF receives the RAA message.
The RAA message that S109, PCRF are sent according to P-GW, certification, authorization response are sent to P-CSCF (Authentication, Authorization Answer, AAA) message, the AAR sent with responding P-CSCF in S204 disappear Breath, then P-CSCF receives the AAA message.
(Answer) message of S110, P-CSCF forward 183 gives video communication initiator, and video communication initiator receives should 183 (Answer) message, so far, the video communication of video communication initiator and video communication reception side are successfully established, and the two can To carry out video communication.
In the prior art, only focus on video communication establishes process, video communication establish after, can not according to The experience at family to carry out management and control to video communication, also just can not preferably ensure communication quality.For the technical problem, sheet Inventive embodiments provide solution, introduce the technical scheme that the embodiment of the present invention is provided below in conjunction with the accompanying drawings.
The application scenarios of embodiment for a better understanding of the present invention, the system that the embodiment of the present invention is applied is introduced first Organization Chart.Fig. 2 is referred to, the system architecture diagram provided by one embodiment of the invention, the method that will be introduced below can be with Realized by the system architecture.Wherein video communication is related to communicating pair, and Fig. 2 merely illustrates the framework of one side, shown in Fig. 2 Can be side where video communication initiator system architecture or video communication reception side where side System architecture.In fig. 2, video communication side can communicate with policy control functions entity, so as to which policy control functions entity can To be managed to experience of the video communication side in video communication.
Fig. 2 is overall framework, and the detailed framework of several comparisons based on the framework shown in Fig. 2 is introduced in citing below Figure.
Exemplified by moving access way, optionally, except in Fig. 2 in the system architecture that one embodiment of the invention is provided Outside video communication side and policy control functions entity, base station, the S-GW and P-GW of core-network side of access side can also be included, And the network element such as IMS and P-CSCF, Fig. 3 A are referred to, are to include one kind that the embodiment of the present invention after these optional network elements is provided More detailed system architecture diagram.In figure 3 a, video communication side is by taking mobile phone as an example, policy control functions entity using PCRF as Example.It can be seen that, mobile phone is communicated with base station, and base station communicates with S-GW from Fig. 3 A, and S-GW connects P-GW by S5 interfaces, P-GW connects IMS by SGi interfaces, and IMS can connect P-CSCF, and P-CSCF is connected further through Rx interface with PCRF, and PCRF It is connected by Gx interfaces with P-GW.
The method that the embodiment of the present invention is provided is in addition to it can apply in mobile access architecture as shown in Figure 3A, also It can apply under fixed network access architecture, i.e., the video communication side in the embodiment of the present invention can be mobile terminal device, It can also be the fixed terminal equipment in fixed network.By taking fixed network access way as an example, then optional, the present invention one is real Apply in the system architecture that example is provided in addition to the video communication side in Fig. 2 and policy control functions entity, can also include Digital subscriber line access multiplex (Digital Subscriber Line Access Multiplexer, DSLAM), broadband RAS (Broadband Remote Access Server, BRAS), checking, authorization and accounting (Authentication, Authorization, Accounting, AAA), deep message detect (Deep Packet Inspection, DPI) and the network element such as entrance (Portal) server, refer to Fig. 3 B and Fig. 3 C, be include these can network selection Two kinds of more detailed system architecture diagrams that the embodiment of the present invention is applied after member, Fig. 3 B and Fig. 3 C difference essentially consist in, figure In 3B, DPI is built in BRAS, i.e. BRAS possesses the function of DPI network elements, and in Fig. 3 C, DPI network elements are external, with BRAS It is two network elements independent of each other.In Fig. 3 B and Fig. 3 C, video communication side is by taking wideband user equipment as an example, policy control functions Entity is with Unified Policy and charging control system (Unified Policy and Charging Controller, UPCC) Example, UPCC can regard a kind of entity for being used to realize PCRF function as, i.e., the policy control functions reality in Fig. 3 B and Fig. 3 C Body equivalent to or by taking PCRF as an example.
From Fig. 3 B it can be seen that, wideband user equipment is connected with DSLAM, and DSLAM is connected with BRAS, BRAS respectively with AAA, UPCC and internet (Internet) connection, UPCC are connected with Portal.
From Fig. 3 C it can be seen that, wideband user equipment is connected with DSLAM, and DSLAM is connected with BRAS, BRAS respectively with AAA is connected with DPI, and DPI is connected with UPCC and Internet respectively, and UPCC is connected with Portal.
It is noted that Fig. 2-Fig. 3 C are simply illustrative of the system architecture that several embodiment of the present invention are applied, and The adaptable system architecture not limited to this of the embodiment of the present invention, if for example, policy control functions entity is not PCRF but its His network element, then according to the difference of network at other network elements position in a network and place etc., can have again corresponding System architecture, or, even if policy control functions entity is PCRF, and PCRF is shown in Fig. 2-Fig. 3 C except that can be located at Outside in system framework, it is also possible to which in other systems framework, then it is corresponding naturally also to may apply to these for the embodiment of the present invention System architecture in.
Several system architectures that the embodiment of the present invention is applied are described above, are carried below introducing the embodiment of the present invention Before the method for confession, the equipment that the embodiment of the present invention is provided is introduced first, understands present invention implementation from hardware configuration with elder generation The scheme that example provides.
Fig. 4 show the schematic diagram of the computer equipment 400 of one embodiment of the invention offer.Computer equipment 400 includes At least one processor 401, communication bus 402, memory 403 and at least one communication interface 404.In the embodiment of the present invention Policy control functions entity can be realized by the computer equipment 400 shown in Fig. 4.
Processor 401 can be general central processor (CPU), microprocessor, ASIC (Application-Specific Integrated Circuit, ASIC), or it is one or more for controlling the present invention program The integrated circuit that program performs.
Communication bus 402 may include a path, and information is transmitted between said modules.Communication interface 404, use any receipts Send out a kind of device of device, for other equipment or communication, such as Ethernet, wireless access network (RAN), wireless local Net (Wireless Local Area Networks, WLAN) etc..
Memory 403 can be read-only storage (read-only memory, ROM) or can store static information and instruction Other kinds of static storage device, random access memory (random access memory, RAM) or letter can be stored Breath and other kinds of dynamic memory or the EEPROM (Electrically of instruction Erasable Programmable Read-Only Memory, EEPROM), read-only optical disc (Compact Disc Read- Only Memory, CD-ROM) or other optical disc storages, laser disc storage (including compression laser disc, laser disc, laser disc, digital universal Laser disc, Blu-ray Disc etc.), magnetic disk storage medium or other magnetic storage apparatus or can be used in carrying or store with referring to The desired program code of order or data structure form simultaneously can be by any other medium of computer access, but not limited to this. Memory 403 can be individually present, and be connected by bus with processor 401.Memory 403 can also be with processor 401 Integrate.
Wherein, memory 403 is used to store the application code for performing the present invention program, and is controlled by processor 401 System performs.Processor 401 is used to perform the application code stored in memory 403.If policy control functions entity passes through Computer equipment 400 is realized, then can store one or more software modules in the memory 403 of policy control functions entity, Policy control functions entity can realize the software mould of storage by the program code in processor 401 and memory 403 Block, bandwidth is adjusted in video communication to realize.Specifically, policy control functions entity can pass through processor 401 The program code stored in memory 403 is called, to obtain the video tastes actual value of video communication side, and video tastes are real The video tastes reference value pre-set for the video communication side stored in actual value and memory 403 is compared, if regarded Frequency experience actual value and video tastes reference value are inconsistent (wherein inconsistent to be more than including two kinds of situations, video tastes actual value Video tastes reference value, or video tastes actual value are less than video tastes reference value), then processor 401 can be according to video body The current bandwidth of reference value or video communication side is tested to determine target bandwidth, and can indicate that video lead to by communication interface 404 Current Bandwidth adjustment is target bandwidth by letter side, so as to be achieved that the pipe in the video communication to video communication side Reason, it can determine whether to adjust bandwidth according to real experiences of the video communication side in communication process, ensure video as far as possible Communication party can be enjoyed in the communication experiences contracted in advance.
In the specific implementation, as a kind of embodiment, processor 401 can include one or more CPU, such as in Fig. 4 CPU0 and CPU1.
In the specific implementation, as a kind of embodiment, computer equipment 400 can include multiple processors 401, such as scheme First processor 4011 and second processor 4012 in 4, wherein, why are first processor 4011 and second processor 4012 Name is different and reference is different, is intended merely to distinguish multiple processors 401.Each in these processors 401 can To be monokaryon (single-CPU) processor 401 or multinuclear (multi-CPU) processor 401.Here Processor 401 can refer to one or more equipment, circuit, and/or the place for processing data (such as computer program instructions) Manage core.
Above-mentioned computer equipment 400 can be an a general purpose computing device either dedicated computing machine equipment. In the specific implementation, computer equipment 400 can be desktop computer, portable computer, the webserver, palm PC (Personal Digital Assistant, PDA), cell phone, tablet personal computer, wireless terminal device, communication equipment, insertion Formula equipment or the equipment for having similar structures in Fig. 4.The unlimited type for determining computer equipment 400 of the embodiment of the present invention.
The system architecture that the embodiment of the present invention applied and the equipment that the embodiment of the present invention is provided are described above, under The method that the embodiment of the present invention provided is introduced with reference to accompanying drawing in face.It is real with policy control functions during following introduction Exemplified by body is realized by computer equipment 400.And during following introduction, the system architecture shown in Fig. 1 or Fig. 3 A Exemplified by, the introduction more than, those skilled in the art know the application scenarios not limited to this of the embodiment of the present invention naturally.
Fig. 5 is referred to, one embodiment of the invention provides the bandwidth adjusting method in a kind of video communication, is described below The flow of this method.The embodiment of the present invention is because being therefore the policy control exemplified by applying in the system architecture shown in Fig. 2 or Fig. 3 A Functional entity is also by taking PCRF as an example.Wherein, apparent for introduction, during following introduction being directed to foundation regards The process of frequency communication.
In the embodiment of the present invention, operator can pass through OSS (The Office of on PCRF first Strategic Services, OSS) the video communication side that is serviced for the PCRF contracts video tastes reference value, such as Different video communication sides can be contracted its each self-corresponding video tastes reference value, and video tastes reference value can be led to by video Letter side voluntarily determines, or can also be set by operator according to the factor such as network condition or the priority of user, and the present invention is real Example is applied not to be restricted.Video tastes reference value can be stored in memory 403 by PCRF.
S501, need with other video communication sides establish video communication when, video communication initiator passes through default bearer INVITE (Offer) message is sent, INVITE (Offer) message is transmitted directly to P-CSCF, then P-CSCF can receive this INVITE (Offer) message.In the embodiment of the present invention, two are increased newly again on the basis of the original SDP of INVITE (Offer) message Individual instruction, the first instruction and the second instruction are referred to as, wherein the first instruction is used to indicate whether that support reports video tastes real Actual value, the second instruction are used to indicate whether to support dynamic adjusting bandwidth.Wherein, the first instruction may indicate whether to support periodically Video tastes actual value is reported, or simply can also indicate whether that support reports video tastes actual value, without considering to report Cycle.Table 1 is referred to, for the example to the first instruction and the second instruction.
Table 1
Parameter name Parameter declaration Value example
vMOS_report_flag Whether support reports video tastes actual value TRUE OR FALSE
vMOS_adjust_flag Whether dynamic adjusting bandwidth is supported TRUE OR FALSE
In table 1, vMOS_report_flag represents the first instruction, if vMOS_report_flag value is true (TRUE), then show that support reports video tastes actual value, if vMOS_report_flag value is false (FALSE), table It is bright not support to report video tastes actual value.VMOS_adjust_flag represents the second instruction, if vMOS_adjust_flag Value is true (TRUE), then shows to support dynamic adjusting bandwidth, if vMOS_adjust_flag value is false (FALSE), Show not support dynamic adjusting bandwidth.Certain table 1 is example, can represent first by other means in actual applications Instruction and the second instruction.
In embodiments of the present invention, video tastes actual value can include vMOS actual values and video source quality actual value, So, for video communication initiator, if its support reports video tastes actual value, the video tastes specifically reported Which content is actual value include, as included by the video tastes reference value of the video communication initiator to be contracted in advance in PCRF Content depending on.If the video tastes reference value of the video communication initiator to be contracted in advance in PCRF refers to for vMOS Value, then what video communication initiator supported to report is exactly vMOS actual values；If the video contracted in advance in PCRF leads to The video tastes reference value for believing initiator is video source quality references value, then what video communication initiator supported to report is exactly to regard Frequency source quality actual value；If the video tastes reference value of the video communication initiator to be contracted in advance in PCRF is joined for vMOS Value and video source quality references value are examined, then what video communication initiator supported to report is exactly vMOS actual values and video source quality Actual value.It is for other video communication sides and same.
S502, P-CSCF forward INVITE (Offer) message receive the INVITE (Offer) to S-CSCF, then S-CSCF After message, then INVITE (Offer) message is sent to the network of the side where video communication reception side, video communication connects The network of side where debit can be handled accordingly after receiving INVITE (Offer) message.It is not shown in Figure 5 The processing procedure of the network of side where video communication reception side.
The network processes of side where S503, video communication reception side finish after to S-CSCF send 180 (Answer) Message, S-CSCF receive video communication reception side where side network return 180 (Answer) message after, be forwarded To P-CSCF, then P-CSCF receives 180 (Answer) message.
Wherein, carried in 180 (Answer) message video communication reception side whether support to report video tastes actual value and Whether the information of dynamic adjusting bandwidth is supported.If video communication reception side does not support to report video tastes actual value, or does not support Dynamic adjusting bandwidth, then can be without in video communication as long as not supporting any one in both functions The operation of bandwidth is adjusted, i.e., establishes video communication according to mode of the prior art and carries out video communication.So it is Technical scheme provided in an embodiment of the present invention is introduced, in embodiments of the present invention video communication reception side had both supported to report video Experience actual value also supports dynamic adjusting bandwidth.
That is, in call establishment, whether video communication initiator and video communication reception side are for reporting video tastes Actual value and whether support dynamic adjusting bandwidth need it is consensus.
S504-S510, the S104-S110 in the embodiment shown in Fig. 1 is may be referred to, is repeated no more.
S511, video communication initiator calculate video tastes actual value in video communication, and video tastes are real Actual value reports P-CSCF, then P-CSCF receives video tastes actual value.Wherein, video communication initiator can be disappeared by INFO Video tastes actual value is reported P-CSCF by breath, then P-CSCF can receive the INFO message, by parsing the INFO message It is obtained with the video tastes actual value of INFO message carrying.
Wherein, in video communication, if what the video communication side that a video communication side have received opposite end was sent Information, then the video communication side's can that have received information calculates video tastes actual value.It can be seen that either video leads to Believe initiator or video communication reception side, be likely to receive the information that other side sends, therefore in the letter for receiving other side's transmission Video tastes actual value can be calculated during breath.Therefore the video communication initiator in the embodiment of the present invention in S511 is led in video Video tastes actual value is calculated during letter and is reported a kind of simply example, be i.e. video communication initiator is in video communication Cheng Zhongruo have received the information of video communication reception side's transmission, then video communication initiator can calculate video tastes actual value simultaneously Reported, and if if video communication reception side have received the letter of video communication initiator transmission in video communication Breath, then video communication reception side can calculate video tastes actual value and report in the network where video communication reception side P-CSCF, because calculate video tastes actual value and the process such as to report all be similar, therefore the embodiment of the present invention is no longer excessive Description.
Wherein, if the video tastes reference value of the video communication initiator to be contracted in advance in PCRF refers to for vMOS It is worth, then video communication initiator calculates vMOS actual values；If the video communication initiator's to be contracted in advance in PCRF Video tastes reference value is video source quality references value, then video communication initiator calculates video source quality actual value；If The video tastes reference value of the video communication initiator to be contracted in advance in PCRF is that vMOS reference values and video source quality are joined Value is examined, then video communication initiator calculates vMOS actual values and video source quality actual value.
Wherein, vMOS algorithms can be communicated by integrated video in advance in video communication initiator, is calculated by video communication vMOS Method can calculate vMOS actual values and video source quality actual value.It following is a brief introduction of and how to calculate vMOS actual values and video source Quality actual value.
On calculating video source quality actual value：Video communication initiator can be according to the type of coding of video (CodecType), video frequency coding rate (BitRate), complexity of video content (VideoComplexity), the signal of video Source quality (SignalQuality), the quantization parameter (QP) of video, the frame per second (VideoFrameRate) of video, point of video In the display size (DisplaySize) of display unit used in resolution (Resolution) and video communication initiator extremely A kind of few parameter calculates video source quality actual value.
Formula (1) is refer to, for a kind of formula for calculating video source quality actual value：
SQuality=f (DisplaySize, VideoComplexity, Resolution, BitRate, CodecType, VideoFrameRate, SignalQuality, QP) (formula 1)
In formula (1), f () represents to calculate function.
On calculating vMOS actual values：In general vMOS actual values can be influenceed by video source quality actual value, separately Outside in addition to being influenceed by video source quality actual value, the extra shadow that may also be subjected to Interactive Experience and call experience Ring, then vMOS realities can be calculated according at least one of video source quality actual value, Interactive Experience and call experience parameter Actual value.Certain vMOS actual values may also be subjected to the influence of some other parameter, then in calculating process it is also contemplated that.
Wherein, for video communication, Interactive Experience refers to connecting call answering to successful connection from click Treat the time.Communication experience refers to the situation of the interim card or flower screen in business generating process, can basis so that flower shields as an example Flower screen duration (Time Ratio, TR), flower panel product accounting (Block Area Ratio, BAR) and flower screen number At least one of (Frequency) parameter is calculated.Formula (2) is referred to, for a kind of formula for calculating flower screen situation：
SBlocking=f (TR, BAR, Frequency) (formula 2)
In formula (2), sBlocking represents flower screen, and f () represents calculation formula.Wherein, f () the institutes table in formula (1) Calculation formula represented by f () in the calculation formula and formula (2) shown may it is identical may also be different.
The embodiment of the present invention then exists so that video communication initiator calculates vMOS actual values and video source quality actual value as an example After vMOS actual values and video source quality actual value is calculated in video communication initiator, video communication initiator can incite somebody to action VMOS actual values and video source quality actual value report P-CSCF, then P-CSCF cans receive video communication initiator hair The vMOS actual values and video source quality actual value sent, such as video communication initiator can be real by vMOS by INFO message Actual value and video source quality actual value report P-CSCF, then P-CSCF is obtained with vMOS by receiving the INFO message Actual value and video source quality actual value.Table 2 is referred to, for showing for a kind of vMOS actual values and video source quality actual value Example：
Table 2
Parameter name Parameter declaration Value example
vMOS VMOS actual values 3 (such as scope is [1,5])
sQuality Video source quality actual value 3 (such as scope is [1,5])
Video tastes actual value is reported on video communication initiator, including but not limited to following several ways：
1st, periodicity reporting schemes.After a call set up, video communication initiator periodically reports video tastes real Actual value, for example often cross 5S and report once.Specific report cycle, video communication initiator, Huo Zheye can be notified by network side It can be arranged in advance by video communication initiator and network side.
2nd, threshold value reporting schemes.After a call set up, video communication initiator can calculate video tastes reality in real time Value, and video communication initiator can prestore the threshold value of video tastes actual value, if the video tastes being calculated are real Actual value is inconsistent with threshold value, then the video tastes actual value being calculated can be reported P-CSCF by video communication initiator. Video tastes actual value and threshold value are inconsistent, can be that video tastes actual value is less than threshold value, or can also be video tastes Actual value is more than threshold value, and in both cases, video communication initiator can report video tastes actual value.Wherein, such as Fruit video tastes actual value is less than threshold value, then video communication initiator will report video tastes actual value, if video tastes are real Actual value is more than threshold value, then video communication initiator can report video tastes actual value, or can not also report video tastes Actual value.Wherein, the threshold value of video tastes actual value can be sent to video communication initiator by network side, or can also be by Video communication initiator's sets itself, such as can be stored in advance in video communication initiator.
Wherein, if video communication initiator supports to report vMOS actual values, then video communication initiator can be advance Store vMOS threshold values；If video communication initiator supports to report video source quality actual value, then video communication initiator can To prestore video source quality threshold, i.e. the content according to included by video tastes actual value is different, can there is different thresholds Value.If video communication initiator only supports to report a kind of parameter, video communication initiator only needs a kind of parameter： Such as video communication initiator only supports to report vMOS actual values, then the vMOS that video communication initiator will need to only be calculated Actual value is compared with vMOS threshold values, if vMOS actual values are less than vMOS threshold values or vMOS actual values are more than vMOS threshold values, Then video communication initiator determines to report vMOS actual values；Such as video communication initiator only supports to report video source matter Measure actual value, then video communication initiator only need to enter the video source quality actual value being calculated with video source quality threshold Row compares, if video source quality actual value is less than video source quality threshold or video source quality actual value is more than video source quality Threshold value, then video communication initiator determination reports video source quality actual value, relatively simple.And if video communication initiator's branch Hold and report two kinds of parameters, that is, support to report vMOS actual values and video source quality actual value, then video communication initiator can be with The vMOS actual values being calculated and vMOS threshold values are compared in selection, or the video source quality actual value that selection will be calculated Compare with video source quality threshold, that is, select a kind of parameter to be compared, it is more convenient, also avoid confusion.For example, because This factor of video source quality actual value may be have also contemplated that when calculating vMOS actual values, therefore vMOS actual values more have the overall situation Property, then video communication initiator can select vMOS actual values to be compared with vMOS threshold values from two kinds of parameters, if VMOS actual values are less than vMOS threshold values or vMOS actual values are more than vMOS threshold values, then video communication initiator determines to report vMOS real Actual value and video source quality actual value.Certainly, if video communication initiator will select a kind of parameter to compare from two kinds of parameters, Which kind of parameter is so selected actually, can voluntarily be determined by video communication initiator, or can also be given advance notice and regarded by PCRF Frequency communication initiator, or can also be provided by agreement or standard.
In the embodiment of the present invention, voluntarily calculated by video communication side and report video tastes actual value, it is contemplated that be end-to-end Influence, so the degree of accuracy is higher.
The video tastes actual value that video communication initiator sends is sent to by S512, P-CSCF by AAR message PCRF, then PCRF receive the AAR message.
Wherein, PCRF can receive the AAR message by communication interface 404.
After S513, PCRF receive video tastes actual value, determine whether to adjust the current bandwidth of video communication initiator.
After PCRF obtains video tastes actual value, it can be regarded what video tastes actual value and video communication initiator were contracted Frequency experience reference value is compared, if the two is inconsistent, PCRF can determine the current band of video communication initiator to be adjusted It is wide.Wherein, video tastes actual value is consistent with video tastes reference value, can refer to that video tastes actual value is equal to video tastes Reference value；Video tastes actual value and video tastes reference value are inconsistent, including two kinds of situations, and video tastes actual value, which is more than, to be regarded Frequency experience reference value, or video tastes actual value are less than video tastes reference value.Wherein, if video tastes actual value is more than video Reference value is experienced, PCRF can select to adjust the current bandwidth of video communication initiator, be usually now to reduce video video to lead to Believe the current bandwidth of initiator, can save bandwidth leave for other with greater need for equipment use, to reach Network Load Balance Effect；Or if video tastes actual value is more than video tastes reference value, PCRF can also select not adjusting video communication hair The current bandwidth in side is played, because the more big then obvious Consumer's Experience of bandwidth is better, now selects not adjust also possible, can give User preferably experiences.During following introduction, it can select to reduce video communication initiation with PCRF in this case Exemplified by Fang Dangqian bandwidth, i.e. in embodiments of the present invention, determine whether to adjust the current bandwidth of video communication initiator, Can be realized by judging whether video tastes actual value and video tastes reference value consistent, if video tastes actual value and Video tastes reference value is inconsistent, it is determined that to adjust the current bandwidth of video communication initiator.And if video tastes actual value Less than video tastes reference value, then PCRF typically can directly determine the current bandwidth of video communication initiator to be adjusted, because If being less than video tastes reference value for video tastes actual value, show that the current bandwidth of video communication initiator is not enough, Adjustment now is usually the current bandwidth of lifting video communication initiator, to improve network quality so that better user experience.
If video tastes actual value includes video source quality actual value without including vMOS actual values, then obvious video body It is also to include video source quality references value without including vMOS reference values, then PCRF need to only judge video source quality reality to test reference value Magnitude relationship between actual value and video source quality references value.If video tastes actual value includes vMOS actual values without wrapping Include video source quality actual value, then obvious video tastes reference value is also to include vMOS reference values without including video source quality Reference value, then PCRF need to only judge the magnitude relationship between vMOS actual values and vMOS reference values.And if video tastes Actual value includes video source quality actual value and vMOS actual values, then video tastes reference value also includes video source quality references value With vMOS reference values, then PCRF can select vMOS actual values and vMOS reference values being compared, or select video source Quality actual value and video source quality references value are compared, that is, select a kind of parameter to be judged, more convenient, are also kept away Exempt from confusion.For example, because this factor of video source quality actual value may be have also contemplated that when calculating vMOS actual values, therefore VMOS actual values more have of overall importance, then PCRF can select to judge the size between vMOS actual values and vMOS reference values, Without judging the size of video source quality actual value and video source quality references value again.Certainly, if PCRF will be from two kinds of parameters It is middle to select a kind of parameter to judge, then which kind of parameter selected actually, can voluntarily be determined by PCRF, or association can also be passed through View or standard regulation.
In addition, if video tastes actual value includes video source quality actual value and vMOS actual values, and if video leads to Believe the threshold value reporting schemes that initiator uses, then video communication initiator may be also to be compared it have selected a kind of parameter What is carried out afterwards is reported, then the participation S513 selected by parameter and PCRF that the participation selected by video communication initiator is compared is situated between The parameter of the deterministic process to continue can be same parameter, if for example, video communication initiator is choosing in threshold value reporting schemes Select and be compared vMOS actual values and vMOS threshold values, then PCRF can also select vMOS is real during S513 is performed Actual value and vMOS reference values are compared, and keep parameter unanimously make it that final result is more accurate.
In one embodiment, in order that the adjustment obtained for bandwidth is more accurate, PCRF can be it is determined that continuous N time The video tastes actual value of the video communication initiator of acquisition all with video tastes reference value it is inconsistent when indicate video communication again Initiator adjusts current bandwidth, effectively to prevent reforming phenomena.M is positive integer, M value can by PCRF rule of thumb or Set according to network condition, for example, 3, be also not necessarily limited to 3 certainly.In addition, because video communication initiator reports video tastes During actual value, it is therefore possible to use foregoing periodicity reporting schemes, it is also possible to foregoing threshold value reporting schemes are used, that PCRF can also determine whether to be adjusted again using continuous N time this according to the reporting schemes of video communication initiator Anti-oscillating mode.If for example, video communication initiator be when reporting video tastes actual value use periodicity reporting schemes, The video tastes actual value for the video communication initiator that so PCRF can obtain in continuous N time all with video tastes reference value not Indicate that video communication initiator adjusts current bandwidth when consistent again；And if video communication initiator reports video tastes real Using threshold value reporting schemes during actual value, think that video communication initiator has already been through deterministic process in this case, The possibility for occurring shaking is smaller, then PCRF can not use this anti-oscillating mode that continuous N time is adjusted again, only Determine video tastes actual value and the inconsistent can instruction of video tastes reference value of certain video communication initiator transmission Video communication initiator is adjusted, and to cause adjustment more timely, PCRF can also use continuous N time in this case certainly This anti-oscillating mode being adjusted again, with more safe.
In one embodiment, PCRF determines whether to adjust the current bandwidth of video communication initiator in S513, can To be realized by PCRF processor 401.For example, PCRF calls the program generation stored in memory 403 by processor 401 Code, to determine whether to adjust the current bandwidth of video communication initiator.Certainly, PCRF determines whether to adjust video communication hair The implementation not limited to this of the current bandwidth in side is played, other any possible modes can also be used to realize.
S514, if it is determined that the current bandwidth of adjustment video communication initiator, then PCRF according to video tastes reference value or is regarded The current bandwidth of frequency communication initiator determines target bandwidth, wherein, target bandwidth is that video communication initiator to be adjusted to Bandwidth.
The step can be performed by PCRF.Either to reduce the current bandwidth of video communication initiator still will be lifted The current bandwidth of video communication initiator, PCRF can determine target bandwidth according to video tastes reference value, or can be with Target bandwidth is determined according to the current bandwidth of video communication initiator, introduced separately below.
1st, PCRF determines target bandwidth according to video tastes reference value.
PCRF can prestore the mapping relations between video tastes reference value and bandwidth, can such as be stored in memory In 403, so as to which PCRF is by inquiring about the mapping relations, it is possible to it is determined that the video tastes reference value institute with video communication initiator The bandwidth that inquiry obtains can be defined as target bandwidth by corresponding bandwidth, PCRF.Wherein, if video tastes reference value be regarding Frequency source quality references value, then PCRF can store the mapping relations between video source quality references value and bandwidth.If video body It is vMOS reference values to test reference value, then PCRF can store the mapping relations between vMOS reference values and bandwidth.If video body It is video source quality references value and vMOS reference values to test reference value, because PCRF is selection in the deterministic process that S513 is introduced One of which parameter is judged that the mapping that then now PCRF can also be stored between the parameter and bandwidth for participating in judging closes System.For example, PCRF is by judging that vMOS actual values and vMOS reference values determine to adjust video communication initiator in S513 Current bandwidth, then PCRF can prestore the mapping relations between vMOS reference values and bandwidth, directly referred to according to vMOS Value determines target bandwidth, without the factor for considering further that video source quality references value.Wherein, corresponding to each video communication Side, PCRF can store a single mapping relations, more targeted so as to be carried out to single video communication side Adjustment, or PCRF can also only store a mapping relations, and the mapping relations are applied to all video communication sides, so The data that PCRF need to be stored are less, save memory space, implement also simpler.
Table 3 is referred to, a kind of example of the mapping relations between vMOS reference values and bandwidth：
Table 3
Encoding and decoding Profile (class) VMOS reference values Bandwidth (kbps)
…… …… …… ……
H.264 Baseline [4,4.2) 384
H.264 Highline [3.8,4] 220
…… …… …… ……
It can be seen from table 3, if the vMOS reference values of video communication initiator signing are, for example, between 4 and 4.2 4.1, then PCRF can determine object tape a width of 384；If the vMOS reference values of video communication initiator signing are located at 3.8 and 4 Between, for example, 3.8, then PCRF can determine object tape a width of 220.
Table 4 is referred to, a kind of example of the mapping relations between video source quality references value and bandwidth：
Table 4
Encoding and decoding Profile Video source quality references value Bandwidth (kbps)
H.264 Baseline >3.8 440
H.264 Highline [3.3,3.8] 350
…… …… …… ……
It can be seen from table 4, if the video source quality references value of video communication initiator signing is more than 3.8, it is, for example, 3.9, then PCRF can determine object tape a width of 440；If the vMOS reference values of video communication initiator signing are located at 3.3 Hes Between 3.8, for example, 3.6, then PCRF can determine object tape a width of 350.
So as to directly determine target bandwidth according to simple mapping relations can, realize relatively simple.
2nd, PCRF determines target bandwidth according to the current bandwidth of video communication initiator.In this manner, it is divided into again several Kind situation, is introduced separately below.
(1) PCRF determines target bandwidth according to the current bandwidth of the bandwidth of storage and video communication initiator.
Some bandwidth can be prestored in PCRF, can be such as stored in memory 403, PCRF can inquire about storage Bandwidth, by the storage tape that bandwidth difference current with video communication initiator on Bandwidth adjustment direction in the bandwidth of storage is minimum Width is defined as target bandwidth.Wherein, Bandwidth adjustment direction is to be determined according to video tastes actual value and video tastes reference value To the adjustment direction of current bandwidth, Bandwidth adjustment direction is the direction for lifting current bandwidth or the side for reducing current bandwidth To.Wherein, corresponding to each video communication side, PCRF can store at least one bandwidth corresponding to the video communication side, from And more targeted adjustment can be carried out to different video communication sides, or PCRF can also unify memory bandwidth, these Bandwidth is applied to all video communication sides, and the data that such PCRF need to be stored are less, saves memory space, implements also more Simply.
Table 5 is referred to, is the example of the bandwidth stored in PCRF：
Table 5
Sequence number Bandwidth (kbps)
1 384
2 720
3 1024
4 1600
5 2048
… …
Such as the current bandwidth of video communication initiator is 800kbps, it is necessary to lift the current band of video communication initiator Width, then according to table 5, the bandwidth minimum with 800 difference is 1024 on direction of improvement, then PCRF can determine that object tape is a width of 1024kbps.For another example the current bandwidth of video communication initiator is 800kbps, it is necessary to which to reduce video communication initiator current Bandwidth, then according to table 5, the bandwidth minimum with 800 difference is 720 on direction is reduced, then PCRF can determine object tape A width of 720kbps.
Target bandwidth is assured that according to the bandwidth of storage, mode is simple.
(2) PCRF determines target bandwidth according to the current bandwidth of preset data and video communication initiator.
A kind of preset data is pre-set bandwidths, and PCRF only need to be by the current bandwidth of video communication initiator and pre-set bandwidths phase Add, it is possible to obtain target bandwidth.Wherein, because including lifting for the Bandwidth adjustment direction of video communication initiator and reducing Both direction, therefore PCRF can prestore two pre-set bandwidths, a pre-set bandwidths are referred to as the first pre-set bandwidths, corresponded to Direction of improvement, another pre-set bandwidths are referred to as the second pre-set bandwidths, corresponding to reduction direction.First pre-set bandwidths and second are preset The value of bandwidth can with equal, simply symbol on the contrary, i.e. the first pre-set bandwidths be on the occasion of and the second pre-set bandwidths are negative values, such as One pre-set bandwidths are 100kbps, and the second pre-set bandwidths are -100kbps, are certainly not limited to these numerical value.Or the first default band Wide and the second pre-set bandwidths values are unequal, and symbol is also on the contrary, such as the first pre-set bandwidths are 120kbps, the second pre-set bandwidths For -80kbps, these numerical value are certainly not limited to.
Wherein, corresponding to each video communication side, PCRF can store single pre-set bandwidths, so as to single Video communication side carries out more targeted adjustment, or PCRF can also uniformly store a pre-set bandwidths, the pre-set bandwidths Suitable for all video communication sides, the data that such PCRF need to be stored are less, save memory space, implement also simpler It is single.
As the alternative of this preset data of pre-set bandwidths, another preset data can be preset ratio, PCRF The current bandwidth of video communication initiator need to be only multiplied with preset ratio, it is possible to obtain target bandwidth.Wherein, because for The Bandwidth adjustment direction of video communication initiator includes lifting and reducing both direction, therefore PCRF can prestore two in advance If ratio, a preset ratio is referred to as the first preset ratio, and corresponding to direction of improvement, it is default that another preset ratio is referred to as second Ratio, corresponding to reduction direction.First preset ratio can be more than 1, and the span of the second preset ratio can be (0,1), For example, the first preset ratio is 110%, the second preset ratio is 90%, is certainly not limited to these numerical value.
Wherein, corresponding to each video communication side, PCRF can store single preset ratio, so as to single Video communication side carries out more targeted adjustment, or PCRF can also uniformly store a preset ratio, the preset ratio Suitable for all video communication sides, the data that such PCRF need to be stored are less, save memory space, implement also simpler It is single.
In one embodiment, in S514 PCRF according to the current band of video tastes reference value or video communication initiator Width determines target bandwidth, can be realized by PCRF processor 401.For example, PCRF calls memory by processor 401 The program code stored in 403, to determine object tape according to the current bandwidth of video tastes reference value or video communication initiator It is wide.Certainly, PCRF determines the realization side of target bandwidth according to the current bandwidth of video tastes reference value or video communication initiator Formula not limited to this, other any possible modes can also be used to realize.
S515, PCRF send probe requests thereby to P-GW, and the probe requests thereby can be realized by RAR message, to detect P-GW Whether support the current bandwidth of video communication initiator being promoted to target bandwidth, then P-GW receives the probe requests thereby.Wherein, exist The target bandwidth of PCRF determinations can be carried in RAR message, PCRF can send the probe requests thereby by communication interface 404.
In fact, PCRF can send the probe requests thereby, simply in embodiments of the present invention, data network to data gateway Close by taking P-GW as an example.
S516, P-GW judge whether to disclosure satisfy that the requirement of bandwidth lifting according to currently practical service conditions, and to PCRF sends the probe response for probe requests thereby, and the probe response can realize that then PCRF receives the RAA by RAA message Message.Wherein, PCRF can receive the RAA message by communication interface 404.Indication field can be carried in RAA message, should Indication field can serve to indicate that whether P-GW supports the current bandwidth of video communication initiator being promoted to target bandwidth.
If P-GW does not support to lift bandwidth, and video communication initiator directly carries out the operation of bandwidth lifting, then very may be used It can fail, therefore can first determine whether P-GW supports to lift bandwidth in the embodiment of the present invention, it is determined that P-GW can be supported The lifting operation of bandwidth is carried out after lifting bandwidth again, the probability of bandwidth lifting failure can be reduced, avoid equipment from flogging a dead horse.
It is noted that under the scheme of lifting bandwidth, S515 and S516 are alternatives, it is not necessary to execution, i.e., S515 and S516 can not also be performed and directly carry out the lifting operation of bandwidth.In addition, the embodiment of the present invention is to lift bandwidth Exemplified by, if necessary to reduce bandwidth, then S515 and S516 need not be performed, because bandwidth declines, the equipment of bearing bed necessarily can Meet to require, in general without detection.
If bandwidth need to be lifted, and PCRF determines that P-GW supports the current bandwidth of video communication initiator being promoted to target Bandwidth, then current Bandwidth adjustment is target bandwidth by PCRF instructions video communication initiator, if bandwidth, PCRF need to be reduced It need not detect whether P-GW supports, PCRF can indicate that current Bandwidth adjustment is target bandwidth by video communication initiator, under Face introduces how PCRF indicates that video communication initiator adjusts bandwidth.
S517, PCRF send AAA message to P-CSCF, and target bandwidth can be carried in AAA message, then P-CSCF is received The AAA message.Wherein, PCRF can send AAA message by communication interface 404 to P-CSCF.Wherein, if performing S515 And S516, then the result of detection to P-GW can also be carried in AAA message.Table 6 is referred to, is the mesh carried in AAA message Marker tape is wide and the example of result of detection to P-GW：
Table 6
According to table 6, if the value of result of detection is TRUE, it is that video communication initiator is current to show that P-GW is supported Bandwidth adjustment is target bandwidth, and if the value of result of detection is FALSE, then show that P-GW does not support to initiate video communication Fang Dangqian Bandwidth adjustment is target bandwidth.
After S518, P-CSCF receive AAA message, 200 (INFO) message, then video communication are sent to video communication initiator Initiator receives 200 (INFO) message, and target bandwidth can be carried in 200 (INFO) message.Wherein, if P-CSCF is received AAA message in carry result of detection to P-GW, then the detection knot to P-GW can also be carried in 200 (INFO) message Fruit.That is P-CSCF can obtain the target bandwidth carried in the AAA message of reception, or obtain and carried in the AAA message received Target bandwidth and the result of detection to P-GW, and the parameter of acquisition carried and is sent to video in 200 (INFO) message and leads to Believe initiator.
After S519, video communication initiator receive 200 (INFO) message, however, it is determined that the value of result of detection is TRUE, then It can initiate to update (UPDATE) flow, i.e., UPDATE message be sent to P-CSCF, to update the reception of video communication initiator The bandwidth in direction, i.e. the Bandwidth adjustment by the reception direction of video communication initiator is target bandwidth.Then P-CSCF, which is received, is somebody's turn to do UPDATE message.Wherein, the reception direction of video communication initiator, that is, video communication initiator is in video communication Receive the direction of the information transmitted by video communication reception side.Because video communication initiator is to receive video communication reception side The video tastes actual value that is calculated during transmitted information and what is carried out report, therefore the bandwidth that need to be updated namely regards The bandwidth in the reception direction of frequency communication initiator.
After S520, P-CSCF receive the UPDATE message, the UPDATE message can be transmitted to S-CSCF, S-CSCF connects Receive the UPDATE message, and the UPDATE message is transmitted to the network of the side where video communication reception side by S-CSCF again, To complete the renewal of the bandwidth of the network of the side where video communication reception side, i.e. side where video communication reception side It is target bandwidth that network, which is also needed Bandwidth adjustment,.The network of side where video communication reception side carries out the adjustment of bandwidth, can To be as the target bandwidth, the sender of video communication reception side by the Bandwidth adjustment of the sending direction of video communication reception side To, that is, video communication reception side in video communication to video communication initiator send information direction.In Fig. 5 The situation of the network of the side where video communication reception side is not shown.
It is noted that P-CSCF before this UPDATE message is forwarded, it is necessary to first complete the bearer update of this side, this portion Point content refers to prior art, repeats no more.
S521, video communication recipient where side network complete carrying renewal after, to the hair of video communication The S-CSCF for playing the side at side place sends response message, and the response message is 200 (UPDATE) message, then S-CSCF receptions should After 200 (UPDATE) message, 200 (UPDATE) message of reception are sent to P-CSCF, P-CSCF is received 200 (UPDATE) Message.
Wherein, if the network of side where the recipient of video communication can not for target bandwidth, video communication The network of side where recipient sends processing failure (OXX) to the S-CSCF of the side where the initiator of video communication and disappeared Breath, then this bandwidth renewal failure.
200 (UPDATE) message of reception are transmitted to video communication initiator, video communication initiator by S522, P-CSCF Receive 200 (UPDATE) message.Then Bandwidth adjustment success.
Afterwards, video communication initiator and video communication reception side can be realized to Consumer's Experience by the adjustment to code check Adjustment, so as to the bandwidth after renewal, i.e. target bandwidth, communicated.
It is noted that S520-S522 is optional step, i.e. the bandwidth renewal process of video communication reception side is optional mistake Journey, it is not necessary to execution.
In the embodiment shown in fig. 5, the situation that video communication side reports video tastes actual value is described, in another kind In mode, video tastes actual value can also be reported by other equipment, for example, at the initial stage of video communication service deployment, or For person in specific scene, video communication side may not possess the condition for reporting video tastes actual value, can not report video body Actual value is tested, then video tastes actual value can also be reported by other equipment, so as to realize the monitoring to video communication. It is described below by other equipment to report the technical scheme of video tastes actual value.
Fig. 6 is referred to, one embodiment of the invention provides the bandwidth adjusting method in a kind of video communication, is described below The flow of this method.The embodiment of the present invention is because being therefore the policy control exemplified by applying in the system architecture shown in Fig. 2 or Fig. 3 A Functional entity is also by taking PCRF as an example.Wherein, apparent for introduction, during following introduction being directed to foundation regards The process of frequency communication.
In the embodiment of the present invention, operator first can be on PCRF, the video communication that is serviced by OSS for the PCRF Side's signing video tastes reference value, such as referred to for different video communication sides its each self-corresponding video tastes that can contract It is worth, video tastes reference value can voluntarily be determined by video communication side, or can also be by operator according to network condition or use The factors such as the priority at family are set, and the embodiment of the present invention is not restricted.Video tastes reference value can be stored in storage by PCRF In device 403.
S601, need with other video communication sides establish video communication when, video communication initiator passes through default bearer INVITE (Offer) message is sent, INVITE (Offer) message is transmitted directly to P-CSCF, then P-CSCF can receive this INVITE (Offer) message.In the embodiment of the present invention, because report video tastes actual value without video communication side, therefore Increase an instruction on the basis of the original SDP of INVITE (Offer) message newly again, this is designated as the second instruction, for referring to Show whether support dynamic adjusting bandwidth.
S602, P-CSCF forward INVITE (Offer) message receive the INVITE to S-CSCF, then S-CSCF (Offer) after message, the network for side INVITE (Offer) message being sent to where video communication reception side, video The network of side where communication receiver can be handled accordingly after receiving INVITE (Offer) message.In figure 6 The processing procedure of the network of the side where video communication reception side is not shown.
S603-S610, the S503-S510 in the embodiment shown in Fig. 5 is may be referred to, is repeated no more.
S611, edge conversation controller (Session Border Controller, SBC) calculate video communication initiator Video tastes actual value, and the video tastes actual value being calculated is sent to PCRF, then PCRF passes through communication interface 404 Receive the video tastes actual value.
Wherein, in video communication, if what the video communication side that a video communication side have received opposite end was sent Information, then video communication side's can of receive information calculates video tastes actual value.It can be seen that either video communication Initiator or video communication reception side, it is likely to receive the information that other side sends, therefore in the information for receiving other side's transmission When, SBC can calculate the video tastes actual value of the video communication side of receive information.Therefore in the embodiment of the present invention in S611 SBC the video tastes actual value of video communication initiator is calculated in video communication is a kind of example, i.e. video leads to If letter initiator have received the information of video communication reception side's transmission in video communication, SBC can calculate video and lead to Believe the video tastes actual value of initiator, and if video communication reception side have received video communication hair in video communication The information just sent is played, then the SBC in the network where video communication reception side can also calculate regarding for video communication reception side Frequency experience actual value, and the PCRF video tastes actual value of calculating being sent in the network where video communication reception side. Because it is all similar to calculate video tastes actual value with processes such as transmissions, therefore the embodiment of the present invention no longer excessively describes.
Wherein, in the embodiment of the present invention calculate video tastes actual value equipment be by taking SBC as an example, in actual applications, It is specifically that what equipment is not restricted for the equipment for calculating video tastes actual value.In existing network, SBC is typically set with P-CSCF Put in an entity device, therefore, if SBC calculates video tastes actual value, SBC can lead to P-CSCF role Cross AAR message and video tastes actual value is sent to PCRF, then PCRF receives the AAR message.Fig. 6 is as example.Wherein, PCRF The AAR message can be received by communication interface 404.
Wherein, video tastes actual value how being calculated on SBC, which content is video tastes actual value include actually, with And SBC sends the contents such as the mode of video tastes actual value to PCRF, refers to the video communication in the embodiment shown in Fig. 5 The mode of operation of initiator.
S612-S616, the S513-S517 in the embodiment shown in Fig. 5 is may be referred to, is seldom repeated.It is noted that this Inventive embodiments continue with a width of example of elevator belt, under the scheme of lifting bandwidth, S614 and S615 (corresponding to S515 and S516) It is alternative, it is not necessary to execution, i.e., it can not also perform S614 and S615 and directly carry out the lifting operation of bandwidth.Such as Fruit needs to reduce bandwidth, then need not perform S614 and S615, because bandwidth declines, the equipment of bearing bed necessarily disclosure satisfy that will Ask, without detection.
After S617, P-CSCF receive the AAA message that PCRF is sent, INFO message is sent to video communication initiator, then is regarded Frequency communication initiator receives the INFO message, and target bandwidth can be carried in INFO message.Wherein, if P-CSCF receive The result of detection to P-GW is carried in AAA message, then the detection knot to P-GW can also be carried in 200 (INFO) message Fruit.
After S618, video communication initiator receive INFO message, response message is sent to P-CSCF, the response message is 200 (INFO) message, then P-CSCF receive 200 (INFO) message.
S619, video communication initiator initiate renewal (UPDATE) flow, i.e., UPDATE message are sent to P-CSCF, with more The bandwidth in the reception direction of new video communication initiator, i.e., be target by the Bandwidth adjustment in the reception direction of video communication initiator Bandwidth.Then P-CSCF receives the UPDATE message.Because SBC is to receive video communication reception Fang Suofa in video communication initiator The video tastes actual value calculated during the information sent, therefore the bandwidth that need to update i.e. video communication initiator connect Debit to bandwidth.
S620-S622, the S520-S522 in the embodiment shown in Fig. 5 is may be referred to, is seldom repeated.
Wherein, S620-S622 is optional step, i.e. the bandwidth renewal process of video communication reception side is optional process, no Have to carry out.
It should be noted that in the embodiment shown in Fig. 5 and the embodiment shown in Fig. 6, the numbering before each step is not The actual execution sequence of step is represented, in actual applications, each step can perform according to any possible order.
In the embodiment of the present invention, video communication can be adjusted in real time according to the subscription data of user in video communication Experience, expected stable experience can be provided the user, lift the satisfaction of user, increase operator income.And Ke Yiwei Different users provides different business experiences, lifts the efficiency of operation of carrier network.
Equipment and system provided in an embodiment of the present invention are introduced with reference to Figure of description.
Fig. 7 is referred to, one embodiment of the invention provides a kind of policy control functions entity, and the policy control functions entity can With including receiving unit 701 and processing unit 702.
Optionally, the equipment can also include transmitting element 703, show in the lump in the figure 7.Wherein, because transmitting element 703 be optional functional module, therefore the form of dotted line frame is depicted as in Fig. 7 mutually to be distinguished with other functional modules.
In actual applications, entity device corresponding to receiving unit 701 can include the communication interface 404 in Fig. 4, processing Entity device corresponding to unit 702 can be the processor 401 in Fig. 4, and entity device can include corresponding to transmitting element 703 Communication interface 404 in Fig. 4.It is believed that in communication interface 404 in Fig. 4, some communication interfaces 404 realize receiving unit 701 function, some communication interfaces 404 realize the function of transmitting element 703, or the communication interface being believed that in Fig. 4 In 404, each communication interface 404 it may can realize that the function of receiving unit 701 can also realize the work(of transmitting element 703 Energy.
The policy control functions entity can be used for performing the embodiment shown in above-mentioned Fig. 5 or the embodiment institute shown in Fig. 6 The method of offer, such as can be foregoing policy control functions entity.Therefore, in the policy control functions entity The function realized of each unit etc., refer to such as the description of front method part, seldom repeat.
Fig. 8 is referred to, one embodiment of the invention provides a kind of video communication system, and the video communication system is included at media Manage equipment 801 and policy control functions entity 802.
In embodiments of the present invention, medium processing device 801 can be used for the video tastes reality for calculating video communication side Value, and the video tastes actual value being calculated is sent to policy control functions entity 802.Wherein, video tastes actual value For indicating real experiences of the video communication side in video communication is carried out.Policy control functions entity 802 can be used for The video tastes actual value that medium processing device 801 is sent is received, if the video body of video tastes actual value and video communication side Test that reference value is inconsistent, target bandwidth is determined according to the current bandwidth of video tastes reference value or video communication side, and instruction regards Current Bandwidth adjustment is target bandwidth by frequency communication party.Wherein, video tastes reference value is pre- for being designated as video communication side If experience of the video communication side in video communication.
Wherein, the embodiment of the present invention is realized by which kind of equipment and is not restricted actually for medium processing device 801, as long as Medium processing device 801 can calculate the video tastes actual value of video communication side, and the video tastes that will can be calculated Actual value is sent to policy control functions entity 802.As an example, a kind of medium processing device 801 can be Fig. 6 The SBC introduced in shown embodiment.
The embodiment shown in embodiment-Fig. 7 shown in policy control functions entity 801 and Fig. 2 in the embodiment of the present invention In any embodiment in the policy control functions entity introduced can be same equipment, therefore to policy control functions entity 801 functions that can be done etc. refer to such as the introduction of preceding each embodiment, seldom repeat.
In the embodiment of the present invention, policy control functions entity can be obtained ahead of time as the default video tastes in video communication side Reference value, that is, it is the default experience in video communication side to obtain, and policy control functions entity can also obtain video communication side and exist The video tastes actual value of real experiences in video communication, i.e. video communication side, then policy control functions entity can be with Video tastes actual value and video tastes reference value are compared, if both are inconsistent, this includes two kinds of situations, the first feelings Condition is that video tastes actual value is less than video tastes reference value, and second of situation is that video tastes actual value is joined more than video tastes Value is examined, in both cases, all shows real experiences and the video communication side experienced during video video communication side The experience that should be experienced is inconsistent, and video tastes reference value is set in advance, it may be possible to wishes what is had in video communication side Experience, or be probably the experience with relatively good effect, therefore policy control functions entity can indicates video communication The current bandwidth in adjustment video communication side of side, with cause as far as possible real experiences of the video communication side in video communication with for The default experience in video communication side is consistent, improves video communication quality, also meets the actual demand of video communication side.That is, pass through Technical scheme provided in an embodiment of the present invention can be with management and control video communication, can be according to the actual body of user in communication process Adjustment bandwidth is tested, can preferably ensure network quality.
In the present invention, it should be understood that disclosed apparatus and method, can realize by another way.For example, Device embodiment described above is only schematical, for example, the division of the unit or unit, only a kind of logic Function divides, and can have other dividing mode when actually realizing, such as multiple units or component can be combined or can collected Into to another system, or some features can be ignored, or not perform.Another, shown or discussed mutual coupling Close or direct-coupling or communication connection can be by some interfaces, the INDIRECT COUPLING or communication connection of device or unit, can be with It is electrical or other forms.
The embodiment of the present invention also provides a kind of computer-readable storage medium, wherein, the computer-readable storage medium can be stored with journey Sequence, including the bandwidth adjusting method in any video communication described in the above method embodiment when program performs Part or all of step.
Each functional unit in embodiments of the present invention can be integrated in a processing unit, or unit also may be used To be independent physical module.
If the integrated unit is realized in the form of SFU software functional unit and is used as independent production marketing or use When, it can be stored in a computer read/write memory medium.Based on such understanding, the whole of technical scheme Or part can be embodied in the form of software product, the computer software product is stored in a storage medium, including Some instructions are causing a computer equipment, such as can be personal computer, server, or network equipment etc., or Processor (processor) performs all or part of step of each embodiment methods described of the present invention.And foregoing storage is situated between Matter includes：General serial bus USB (Universal Serial Bus flash drive), mobile hard disk, ROM, RAM, Magnetic disc or CD etc. are various can be with the medium of store program codes.
Described above, above example is implemented above only technical scheme to be described in detail The explanation of example is only intended to help the method for understanding the embodiment of the present invention, should not be construed as the limitation to the embodiment of the present invention.This The change or replacement that those skilled in the art can readily occur in, should all cover the embodiment of the present invention protection domain it It is interior.

Claims (15)

  1. A kind of 1. bandwidth adjusting method in video communication, it is characterised in that including：
    Policy control functions entity receives the video tastes actual value of video communication side；The video tastes actual value is used to indicate Real experiences of the video communication side in video communication is carried out；
    If the video tastes actual value and the video tastes reference value of the video communication side are inconsistent, the policy control work( Energy entity determines target bandwidth according to the current bandwidth of the video tastes reference value or the video communication side；The video body Reference value is tested to be used to be designated as experience of the default video communication side of the video communication side in video communication；
    The current Bandwidth adjustment is the target bandwidth by the policy control functions entity instruction video communication side.
  2. 2. the method as described in claim 1, it is characterised in that the policy control functions entity is joined according to the video tastes Examine value and determine the target bandwidth, including：
    Mapping relations between video tastes reference value and bandwidth that the policy control functions object query prestores, will be with Bandwidth corresponding to the video tastes reference value is defined as the target bandwidth.
  3. 3. the method as described in claim 1, it is characterised in that the policy control functions entity is according to the video communication side Current bandwidth determines the target bandwidth, including：
    The bandwidth of the policy control functions object query storage, it will work as in the bandwidth of storage on Bandwidth adjustment direction with described The minimum memory bandwidth of preceding bandwidth difference is defined as the target bandwidth；The Bandwidth adjustment direction is according to the video body Test the adjustment direction to the current bandwidth that actual value and the video tastes reference value determine, the Bandwidth adjustment direction To improve the direction of the current bandwidth or reducing the direction of the current bandwidth.
  4. 4. the method as described in claim 1, it is characterised in that the policy control functions entity is according to the video communication side Current bandwidth determines the target bandwidth, including：
    The current bandwidth is added by the policy control functions entity with pre-set bandwidths, obtains the target bandwidth；Or
    The current bandwidth is multiplied by the policy control functions entity with preset percentage, obtains the target bandwidth.
  5. 5. the method as described in claim 1-4 is any, it is characterised in that
    The video tastes reference value is video subjectivity average score vMOS reference values, accordingly, the video tastes actual value For vMOS actual values；Or
    The video tastes reference value is video source quality references value, and accordingly, the video tastes actual value is video source matter Measure actual value.
  6. 6. the method as described in claim 1-5 is any, it is characterised in that the current bandwidth is less than the target bandwidth；
    The policy control functions entity indicate the video communication side by current Bandwidth adjustment be the target bandwidth it Before, in addition to：
    The policy control functions entity sends probe requests thereby to data gateway, to detect whether the data gateway is supported institute State the current bandwidth in video communication side and be promoted to the target bandwidth；The target bandwidth is carried in the probe requests thereby；
    The policy control functions entity receives the probe response for the probe requests thereby that the data gateway is sent；
    The current Bandwidth adjustment is the target bandwidth by the policy control functions entity instruction video communication side, bag Include：
    If the probe response is used to indicate that the data gateway is supported the current bandwidth in the video communication side being promoted to institute Target bandwidth is stated, then current Bandwidth adjustment is the target by the policy control functions entity instruction video communication side Bandwidth.
  7. 7. the method as described in claim 1-6 is any, it is characterised in that if the video tastes actual value and the video lead to The video tastes reference value of letter side is inconsistent, and the policy control functions entity is according to the video tastes reference value or described regards The current bandwidth of frequency communication party determines target bandwidth, including：
    If the policy control functions entity determine the video tastes actual value of the video communication side that continuous N time obtains with The video tastes reference value is inconsistent, then the policy control functions entity according to the video tastes reference value or described regards The current bandwidth of frequency communication party determines the target bandwidth.
  8. A kind of 8. policy control functions entity, it is characterised in that including：
    Receiving unit, for receiving the video tastes actual value of video communication side；The video tastes actual value is used to indicate institute State real experiences of the video communication side in video communication is carried out；
    Processing unit, if the video tastes reference value for the video tastes actual value and the video communication side is inconsistent, Target bandwidth is determined according to the bandwidth that the video tastes reference value or the video communication side are current, and indicates that the video leads to The current Bandwidth adjustment is the target bandwidth by letter side；The video tastes reference value is led to for being designated as the video Experience of the default video communication side of letter side in video communication.
  9. 9. policy control functions entity as claimed in claim 8, it is characterised in that the processing unit is used to regard according to Frequency experience reference value determines the target bandwidth, including：
    The mapping relations inquired about between the video tastes reference value and bandwidth prestored, will be with the video tastes reference value pair The bandwidth answered is defined as the target bandwidth.
  10. 10. policy control functions entity as claimed in claim 8, it is characterised in that the processing unit is used for according to The current bandwidth in video communication side determines the target bandwidth, including：
    Inquire about the bandwidth of storage, by the bandwidth of storage on Bandwidth adjustment direction with the current bandwidth difference is minimum deposits Storage bandwidth is defined as the target bandwidth；The Bandwidth adjustment direction is according to the video tastes actual value and the video body The adjustment direction to the current bandwidth of reference value determination is tested, the Bandwidth adjustment direction is the raising current bandwidth Direction or reduce the direction of the current bandwidth.
  11. 11. policy control functions entity as claimed in claim 8, it is characterised in that the processing unit is used for according to The current bandwidth in video communication side determines the target bandwidth, including：
    The current bandwidth is added with pre-set bandwidths, obtains the target bandwidth；Or
    The current bandwidth is multiplied with preset percentage, obtains the target bandwidth.
  12. 12. the policy control functions entity as described in claim 8-11 is any, it is characterised in that
    The video tastes reference value is video subjectivity average score vMOS reference values, accordingly, the video tastes actual value For vMOS actual values；Or
    The video tastes reference value is video source quality references value, and accordingly, the video tastes actual value is video source matter Measure actual value.
  13. 13. the policy control functions entity as described in claim 8-12 is any, it is characterised in that the policy control functions are real Body also includes transmitting element；The current bandwidth is less than the target bandwidth；
    The transmitting element is used for：Indicate that current Bandwidth adjustment is the mesh by the video communication side in the processing unit Before marker tape is wide, probe requests thereby is sent to data gateway, to detect whether the data gateway is supported the video communication side Current bandwidth is promoted to the target bandwidth；The target bandwidth is carried in the probe requests thereby；
    The receiving unit is additionally operable to：Receive the probe response for the probe requests thereby that the data gateway is sent；
    Accordingly, the processing unit is the object tape for indicating the video communication side by the current Bandwidth adjustment Width, including：If the probe response that the receiving unit receives is used to indicate that the data gateway is supported to lead to the video The current bandwidth in letter side is promoted to the target bandwidth, it indicates that current Bandwidth adjustment is the mesh by the video communication side Marker tape is wide.
  14. 14. the policy control functions entity as described in claim 8-13 is any, it is characterised in that if the processing unit is used for The video tastes actual value and the video tastes reference value of the video communication side are inconsistent, are referred to according to the video tastes The current bandwidth of value or the video communication side determines target bandwidth, including：
    If it is determined that the video tastes actual value for the video communication side that continuous N time obtains with the video tastes reference value not Unanimously, then the target bandwidth is determined according to the current bandwidth of the video tastes reference value or the video communication side.
  15. 15. a kind of video communication system, it is characterised in that including medium processing device and policy control functions entity；Wherein,
    The medium processing device, for calculating the video tastes actual value of video communication side, and the video tastes are actual Value is sent to the policy control functions entity；The video tastes actual value is used to indicate that the video communication side is being regarded Real experiences in frequency communication process；
    The policy control functions entity is used to receive the video tastes actual value that the medium processing device is sent, if institute It is inconsistent to state the video tastes reference value of video tastes actual value and the video communication side, according to the video tastes reference value Or the current bandwidth in the video communication side determines target bandwidth, and indicate that the video communication side adjusts the current bandwidth Whole is the target bandwidth；The video tastes reference value is used to be designated as the default video communication in the video communication side Experience of the side in video communication.
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