CN108243474A - Data flow transmission method, apparatus and system - Google Patents
Data flow transmission method, apparatus and system Download PDFInfo
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- CN108243474A CN108243474A CN201611225052.4A CN201611225052A CN108243474A CN 108243474 A CN108243474 A CN 108243474A CN 201611225052 A CN201611225052 A CN 201611225052A CN 108243474 A CN108243474 A CN 108243474A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
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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]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/18—Selecting a network or a communication service
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Computer Security & Cryptography (AREA)
- Multimedia (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The present invention discloses a kind of data flow transmission method and relevant device, wherein, media forwarding unit in the embodiment of the present invention is when monitoring the data flow that user terminal is sent by WIFI network, if it is determined that the data packet in data flow needs to retransmit, retransmission notice message is then sent to user terminal by LTE network, the serial number of data packet for needing to retransmit is carried in the notification message, in order to which user terminal retransmits data packet on an LTE network according to the retransmission notice message, the present embodiment can be obtained transmits the technique effect of the data packet of VoWIFI business by two networks of LTE network and WIFI network, improve the fluency of VoWIFI business.
Description
Technical field
The present invention relates to mobile communication technology field more particularly to a kind of data flow transmission method, apparatus and systems.
Background technology
With the development of network technology, voice bearer to WIFI (Voice over WIFI, VoWIFI) business starts to be transported
It seeks quotient and commercialization is provided.Real-time Communication for Power between user, such as voice communication, video calling are mainly carried to wirelessly by VoWIFI
On fidelity (Wireless Fidelity, WIFI) network.
During VoWIFI business, the terminal of user, such as mobile phone, carrier network is linked by WIFI network
Core net.The voice or video data stream of user are transmitted to the gateway in carrier network by WIFI network, then by net
It closes and is forwarded to core net, and by core net by the voice of the user or video data stream to peer user.
The prior art provide VoWIFI business in, due to WIFI network environment there is a situation where it is unstable, such as when
There are multiple terminals to access simultaneously for the WIFI network of preceding access, and terminal to WIFI network access point (Access Point,
AP) channel between equipment does not have service quality (Quality of Service, QoS) guarantee, it may occur that the number in data flow
According to the situation of packet loss, the fluency so as to cause VoWIFI business is not high, and user experience is poor.
Invention content
The embodiment of the present invention provides a kind of data flow transmission method and device, to solve VoWIFI business fluency not
The problem of high.
In order to achieve the above objectives, the embodiment of the present invention adopts the following technical scheme that：
In a first aspect, the embodiment of the present invention provides a kind of data flow transmission method, include the following steps：
Media forwarding unit receives the data flow that terminal is sent by Wireless Fidelity WIFI network, and should to the terminal-pair
Opposite equip. forward the data flow.In addition, media forwarding unit, while transmitting data flow, monitoring user terminal passes through
The data flow that WIFI network is sent, so that it is determined that needing the data packet retransmitted in the data flow, and further passes through LTE network
Retransmission notice message is sent to the user terminal, the sequence of data packet for needing to retransmit is carried in the retransmission notice message
Number.
In the method provided in first aspect, media forwarding unit is in the number that is sent by WIFI network of monitoring user terminal
During according to stream, if it is determined that the data packet in data flow needs to retransmit, then sending retransmission notice to user terminal by LTE network disappears
It ceases, the serial number of data packet for needing to retransmit is carried in the notification message, in order to which user terminal exists according to the retransmission notice message
Data packet is retransmitted in LTE network, the present embodiment can be obtained transmits VoWIFI by two networks of LTE network and WIFI network
The technique effect of the data packet of business improves the fluency of VoWIFI business.
With reference to first aspect, in a kind of possible embodiment, the media forwarding unit monitor terminal passes through WIFI
Following step is further included before the data flow that network is sent：
Media forwarding unit sends instruction message to the gateway that the terminal accesses, and indicates the gateway in institute
It is that the terminal reserves bearing resource to state in LTE network, so as to which gateway reserves carrying money for the terminal on an LTE network
Source directly sends the data packet retransmitted by reserved bearing resource convenient for the SS later, improves the smoothness of VOWIFI business
Degree.
With reference to first aspect, in a kind of possible embodiment, the media forwarding unit determines to need in data flow
The data packet of re-transmission includes：
Media forwarding unit obtains the sequence of the data packet of loss in the data-bag lost in monitoring the data flow
Number.In addition, media forwarding unit can also be when the transmission quality for monitoring the data flow be less than preset value, acquisition needs weight
The sequence number of the data packet of biography.
With reference to first aspect, in a kind of possible embodiment, the steps is further included：
Media forwarding unit caches the data flow that the terminal is sent, and then sets receiving the corresponding opposite end of the terminal
The retransmission request that preparation is sent, when the sequence number of data packet for needing to retransmit is carried in the retransmission request, according in retransmission request
Sequence number obtained from the data flow cached before and need the data packet that retransmits, and the needs are sent to the opposite equip.
The data packet of re-transmission, and then opposite equip. can need the data packet retransmitted with quick obtaining.It is retransmitted relative to by terminal to send
Data packet, present embodiment can further improve the fluency of VOWIFI business.
Second aspect, the embodiment of the present invention provide another data flow transmission method, are mainly implemented by terminal, wherein should
Terminal accesses long term evolution LTE network and Wireless Fidelity WIFI network and is sent by the WIFI network to media forwarding unit
Data flow.In addition, terminal also executes the following steps：
Terminal receives the retransmission notice message of the media forwarding unit transmission by LTE network, and the retransmission notice disappears
The serial number of data packet for needing to retransmit is carried in breath, the serial number of the data packet then retransmitted as needed obtains data packet from local
And the data packet for needing to retransmit is sent to the media forwarding unit by the LTE network.Due to LTE network relative to
The re-transmission data packet that WIFI network, presence service quality assurance, thus terminal are sent loses high probability again to be reduced, thus
Improve the fluency of VOWIFI business.
It is described to be forwarded in terminal by WIFI network to media in a kind of possible embodiment with reference to second aspect
It can also include before equipment transmission data stream：
Terminal keeps its IP multimedia subsystem Access Point Name in the LTE network after the WIFI network is accessed
Claim, so as to which terminal maintains VOLTE service channels and VOWIFI service channels.
With reference to second aspect, in a kind of possible embodiment, IP multimedia subsystem of the terminal on LTE network is kept
During access point name of uniting, the request message for increasing IP address is sent to the media forwarding unit by the LTE network, and then
Terminal uses different IP address in VOLTE service channels, VOWIFI service channels.
With reference to second aspect, in a kind of possible embodiment, in terminal by WIFI network to media forwarding unit
Before transmission data stream, terminal can also close the IMS access point name in LTE network after the WIFI network is linked into,
Then IMS access point name is re-established in the LTE network, and then terminal is led in VOLTE service channels, VOWIFI business
Road uses different IP address.
With reference to second aspect, in a kind of possible embodiment, terminal is by LTE network to the media forwarding unit
The data packet for needing to retransmit is sent to include：
After VOLTE service channels of the terminal on LTE network is closed, pass through the LTE access points in the LTE network
Title sends the data packet for needing to retransmit to the media forwarding unit.In addition, terminal can also be on LTE network be kept
VOLTE service channels after, by the IMS access point name in the LTE network to the media forwarding unit send need
The data packet of re-transmission.
The third aspect, the embodiment of the present invention provide a kind of media forwarding unit, mainly include：Forwarding data flow module,
Monitoring modular and notice sending module.
Wherein, forwarding data flow module, for receiving the data flow that terminal is sent by Wireless Fidelity WIFI network, and to
The terminal corresponding opposite equip. forwarding data flow；
Monitoring modular for monitoring the data flow that the terminal is sent by the WIFI network, determines the data flow
The middle data packet for needing to retransmit；
It notifies sending module, retransmission notice message is sent to the terminal for passing through long term evolution LTE network, it is described heavy
It passes and the serial number of data packet for needing to retransmit is carried in notification message.
With reference to the third aspect, in a kind of possible embodiment, media forwarding unit can also include：
Indicate sending module, for before the data flow that is sent in the monitoring module monitor terminal by WIFI network,
The gateway accessed to the terminal sends instruction message, and it is the end in the LTE network to indicate the gateway
The reserved bearing resource in end.
With reference to the third aspect, in a kind of possible embodiment, the inspection module in media forwarding unit determines data
The data packet retransmitted is needed to include in stream：
The monitoring modular obtains the sequence of the data packet of loss in the data-bag lost in monitoring the data flow
Number.In addition, monitoring modular can also be when the transmission quality for monitoring the data flow be less than preset value, obtaining needs what is retransmitted
The sequence number of data packet.
With reference to the third aspect, in a kind of possible embodiment, the media forwarding unit further includes：
Cache module, for caching the data flow that the terminal is sent；
Retransmission module, for receiving the retransmission request that the corresponding opposite equip. of the terminal is sent, in the retransmission request
Carrying needs the sequence number of data packet that retransmits, and then the sequence number in the retransmission request is from the data flow of the caching
It is middle to obtain the data packet for needing to retransmit, send the data packet for needing to retransmit to the opposite equip..
Fourth aspect, the embodiment of the present invention provide a kind of terminal, including：AM access module, sending module and notice connect
Receive module.
Wherein, AM access module, for accessing long term evolution LTE network and Wireless Fidelity WIFI network；
Sending module, for by the WIFI network to media forwarding unit transmission data stream；
Notify receiving module, the retransmission notice for receiving the media forwarding unit transmission by the LTE network disappears
It ceases, the serial number of data packet for needing to retransmit is carried in the retransmission notice message；
The sending module is additionally operable to obtain data packet from local according to the serial number of data packet for needing to retransmit and lead to
It crosses the LTE network and sends the data packet for needing to retransmit to the media forwarding unit.
With reference to fourth aspect, in a kind of possible embodiment, the terminal further includes：
Keep module, for the sending module by WIFI network before media forwarding unit transmission data stream,
Its IP multimedia subsystem access point name in the LTE network is kept after the terminal accesses the WIFI network.
With reference to fourth aspect, in a kind of possible embodiment, IP multimedia of the terminal on LTE network is kept
During subsystem access point name, above-mentioned sending module can also be sent by the LTE network to the media forwarding unit to be increased
Add the request message of IP address.
With reference to fourth aspect, in a kind of possible embodiment, terminal further includes：
Reconstruction unit, in the sending module of the terminal by WIFI network to media forwarding unit transmission data stream
Before, and the terminal is after the WIFI network is linked into, and the IMS access point name in LTE network is closed, then described
IMS access point name is re-established in LTE network.
5th aspect, the embodiment of the present invention provide a kind of media forwarding unit, including：
For storing the memory of executable code, processor and the total of signal being transmitted between memory and processor
Line, the processor perform the executable code stored in memory so that media forwarding unit performs above-mentioned first aspect and carries
The data flow transmission method of confession.
6th aspect, a kind of terminal of the embodiment of the present invention, including：
For store executable code memory, for showing the display of image, processor and in memory, aobvious
Show the bus that signal is transmitted between device and processor, the processor performs the executable code stored in memory so that eventually
End performs the data flow transmission method that above-mentioned second aspect provides.
7th aspect, the embodiment of the present invention provide a kind of data stream system, are set including media as described above forwarding
It is standby, terminal as described above can also be included.In addition, the system can also include providing access point and the offer of WIFI network
The equipment such as the evolved base station of long-term evolving network.
In the embodiment provided in terms of any of the above, above-mentioned media forwarding unit can be Session Border Controller or point
Group data gateway.Real-time transport protocol (Real Time Protocol, RTP) transmission may be used in data flow.In addition, it retransmits logical
Know that message may be used RTCP Real-time Transport Control Protocol (RTp Control Protocol, RTCP) and be sent to terminal.Wherein, RTCP
It is the agreement for controlling RTP data flows, there are correspondences between RTCP messages and RTP data flows.
Description of the drawings
Fig. 1 applies to the application scenario diagram of the data flow transmission method of the embodiment of the present invention；
Fig. 2 is the flow chart for the data flow transmission method that the embodiment of the present invention one provides；
Fig. 3 is the flow chart of data flow transmission method provided by Embodiment 2 of the present invention；
Fig. 4 is the flow chart for the data flow transmission method that the embodiment of the present invention three provides；
Fig. 5 is the structure diagram for the media forwarding unit that the embodiment of the present invention four provides；
Fig. 6 is the structure diagram for the terminal that the embodiment of the present invention five provides；
Fig. 7 is the functional schematic for the media forwarding unit that the embodiment of the present invention six provides；
Fig. 8 is the functional schematic for the terminal that the embodiment of the present invention seven provides.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is retouched in detail
It states.
Referring to Fig. 1, Fig. 1 applies to the application scenario diagram of the data flow transmission method of the embodiment of the present invention.Such as Fig. 1 institutes
Show, which includes terminal A, terminal B, the access point (Access Point, AP) for providing WIFI network and provide
The evolved base station (evolved NodeB, eNodeB) of long term evolution (Long Term Evolution, LTE) network, service
Gateway (Serving Gateway, SGW), evolved packet data gateway (evolved Packed Data Gateway,
EPDG)/trusted wireless access gateway (Trustful Wireless Access Gateway, TWAG), packet gateway
The equipment such as (Packed Gateway, PGW), Session Border Controller (Session Border controller, SBC).
Wherein, SBC be located in carrier network IP multimedia subsystem (IP Multimedia Sub-system,
IMS) core net.PGW can be IMS core net and the edge device for accessing net (such as WIFI network and LTE network).IMS cores
A part of the heart net for the core net of carrier network.
It, can be by terminal access to IMS core net, mainly specifically, SGW is the functional entity of user plane in LTE network
Function includes：During base station switching (including switching and LTE and Wideband Code Division Multiple Access network switching inside LTE network)
The forwarding of the anchor point function, end packet data of terminal data transmission and routing function etc..Wherein, terminal is referred to as using
Family equipment (User Equipment, UE).There are S5 interfaces between SGW and PGW, which can be used for user plane carrying
It establishes, manage and discharges.
EPDG is mainly used for non-trusted WIFI network access IMS core net, and TWAG is mainly used for trusted WIFI network and connects
Enter IMS core net.The data flow that terminal is sent by WIFI network can be forwarded and be route by ePDG/TWAG, such as
The data flow of terminal A is routed to packet gateway PGW by ePDG/TWAG.
Different access networks (such as LTE network, WIFI network) can be accessed IMS core net, major function by PGW
Including：The routing and forwarding of grouped data, carrying (Bearer) management and charging support etc..In addition, PGW is also used as LTE
Network and non-third generation partner program (3rdGeneration Partner Project, 3GPP) network that defines, such as
CDMA access (Code Division Multiple Access, CDMA), WLAN (Wireless Local
Area Network, WLAN), between in handoff procedure terminal data transmission anchor point.
SBC is the access point of terminal connection IMS core net, the Proxy Call Session Control Function in IMS core net
(Proxy Call Session Control Function, P-CSCF) entity is typically deployed on SBC, thus terminal is sent
Or the IMS signaling messages received are required for by SBC, the data flow that terminal is sent is also required to SBC and is forwarded and route.
In above application scene, terminal A supports VOWIFI business and VOLTE business, when terminal A is currently at LTE nets
In the range of network covering, terminal accesses LTE network by base station or evolved base station, and PGW can be terminal distribution VOLTE business
Corresponding IP address IP1.With reference to Fig. 2, the data flow transmission method that the embodiment of the present invention one provides mainly includes the following steps：
After step 201, terminal are linked into WIFI network, its IMS access point name (IMS on an LTE network is kept
Access Point Name, IMS APN).
VOLTE service channels (the VOLTE business in LTE network is closed after WIFI network is linked into existing terminal
The APN that channel uses is specifically as follows IMS APN) it compares, the terminal A in the present embodiment is being linked into LTE network and WIFI nets
The VOLTE service channels (keeping IMS APN) in (not closing) LTE network are kept after network, VOWIFI business and VOLTE business make
With same IMS APN.Wherein, APN can specifically include the information such as agent address or port.
In the present embodiment, for terminal A after WIFI network is linked into, WIFI network can provide VOWIFI business, and PGW can
Think the corresponding IP address IP2 of terminal distribution VOWIFI business, IP2 and IP1 is identical at this time, i.e., terminal initiate VOWIFI business and
VOLTE business uses identical IP address.During specific implementation, physical interface and access that terminal can will access WIFI network
The physical interface of LTE network bundles, corresponding above-mentioned identical IP address.
Step 202, terminal A initiate to the VOWIFI of opposite equip. to call by WIFI network.
Correspondingly, terminal A initiates to the VOWIFI of opposite equip. (terminal B) to call by WIFI network, such as send and invite
Please (invite) message, wherein can be with the corresponding user identifiers of carried terminal B and IP2, the message is via media forwarding unit
Terminal B is transmitted to, if terminal B answers the calling, returns to 200Ok message, the calling between terminal A and B can establish.
Step 203, media forwarding unit send instruction message to the gateway that terminal A is accessed, and indicate the service network
It is that the terminal reserves bearing resource to close in the LTE network.
In the present embodiment, the IMS APN in LTE network, thus matchmaker are kept after WIFI network is linked into due to terminal A
Body forwarding unit when receiving the Invite message that terminal A is sent by WIFI network, send out by the gateway accessed to terminal A
Send instruction message, indicate the gateway on an LTE network for terminal A reserve the corresponding bearing resources of IMS APN (such as
IMS Deta bearers), in order to subsequently retransmit data packet in the carrying.For example, media forwarding unit indicating service gateway is reserved
The bandwidth of 512Kbps (normal LTE Deta bearers need the bandwidth of 4Mbps).Wherein, terminal A is preserved on media forwarding unit
Access the address of the gateway of LTE network and the address of the ePDG/TWAG of terminal A access WIFI networks.
If media forwarding unit is SBC, SBC sends the instruction message of above-mentioned reserved bearing resource to PGW and SGW, with
Convenient for PGW and SGW the corresponding bearing resources of the IMS APN are reserved for the terminal.If media forwarding unit be PGW, PGW to
SGW sends the instruction message of above-mentioned reserved bearing resource, in order to which SGW reserves the corresponding carryings of the IMS APN for the terminal
Resource.
Wherein, media forwarding unit can also be in the 200OK message for receiving terminal B returns, to the clothes of terminal access
Business gateway SGW sends the instruction message of above-mentioned reserved bearing resource.
Step 204, terminal A are by WIFI network to media forwarding unit transmission data stream.
After terminal B responses (such as returning to 200OK message), the call setup between terminal A and terminal B, terminal A is utilized
WIFI network sends the data flow of VOWIFI business to terminal B, which is forwarded via media forwarding unit.
Media forwarding unit receives the data flows that are sent by WIFI network of terminal A, and to the corresponding opposite equip.s of terminal A
Forward the data flow.In the present embodiment, media forwarding unit can be PGW, or SBC, i.e. PGW and SBC
To realize the function of media forwarding unit in the embodiment of the present invention.The corresponding opposite equip.s of terminal A can be terminal B.Media turn
The data flow can be forwarded, and by the equipment (such as the corresponding PGW of terminal B) in IMS core net to IMS core net by sending out equipment
The stream compression is further issued into terminal B.
Wherein, the transmission of real-time transport protocol (Real Time Protocol, RTP) agreement, the number may be used in data flow
Rtp streaming is referred to as according to stream, and the data packet in rtp streaming is referred to as RTP data packets, RTP packets or RTP messages.
The data flow that step 205, media forwarding unit monitoring terminal A are sent by WIFI network, determines the data flow
The middle data packet for needing to retransmit.
Wherein, media forwarding unit monitoring terminal A can be sent by WIFI network while transmitting data flow
VOWIFI data flows.
Specifically, monitoring data flow the transmission quality of packet loss or data flow can occur for media forwarding unit less than pre-
If during value, determine the data packet for needing to retransmit in the data flow, such as obtain the sequence that the data packet retransmitted is needed in data flow
Number and the mark for determining (or identification) data flow.
It is further illustrated, if the sending cycle of data packet is 20ms, i.e., media forwarding unit is just received per 20ms
To a data packet, when media forwarding unit, (such as 60ms) does not receive next data packet 0010 in preset time, then really
Determine the data-bag lost of serial number 0010.Alternatively, media forwarding unit has received in advance when not receiving 0010 data packet
0011 data packet can then determine the data-bag lost of serial number 0010.
Step 206, media forwarding unit send retransmission notice message by LTE network to terminal A, and the retransmission notice disappears
The serial number of data packet for needing to retransmit is carried in breath.
Since terminal has accessed LTE network and WIFI network simultaneously, media forwarding unit can be by LTE network to terminal
A sends retransmission notice message, and the destination address of the notification message can be above-mentioned IP1.Terminal A receives media forwarding unit and passes through
The retransmission notice message that LTE network is sent.
Wherein, the stream identification of the data flow can also be carried in the retransmission notice message and be used to indicate the end
End retransmits the instruction information of data packet by LTE network.The instruction information is specifically as follows the differentiated services code points of assignment
(Differentiated Services Code Point, DSCP) label.The DSCP labels of the assignment are used to indicate the end
End retransmits data packet by above-mentioned IMS APN.RTCP Real-time Transport Control Protocol (RTp may be used in retransmission notice message
Control Protocol, RTCP) be sent to terminal, i.e. retransmission notice message is sent to terminal by RTCP messages.Wherein,
RTCP is the agreement for controlling RTP messages, and for RTCP messages with rtp streaming there are correspondence, terminal A is receiving RTCP messages
It would know that corresponding rtp streaming afterwards.
Step 207, terminal A need the serial number of data packet that retransmits to obtain data packet and described in passing through from local according to described
LTE network sends the data packet for needing to retransmit to the media forwarding unit.
Terminal is after RTPC messages are received, you can determines corresponding rtp streaming according to RTCP messages.Due to retransmission notice message
Middle to carry the serial number of data packet for needing to retransmit, then terminal A from the local data packet for obtaining caching and can lead to according to the serial number
It crosses the bearing resource reserved in LTE network to retransmit to media forwarding unit, after media forwarding unit receives the data packet of re-transmission
It is forwarded to terminal B, and then terminal B can receive the data packet of re-transmission.
Compared with prior art, the media forwarding unit of the embodiment of the present invention is sent out in monitoring user terminal by WIFI network
During the data flow sent, if it is determined that the data packet in data flow needs to retransmit, then is sent and retransmitted to user terminal by LTE network
Notification message carries the serial number of data packet for needing to retransmit in the notification message, in order to which user terminal is according to the retransmission notice
Message retransmits data packet on an LTE network, since LTE network is relative to WIFI network presence service quality assurance, thus retransmits
The probability that packet loss occurs in data packet reduces, and improves the fluency that terminal uses VOWIFI business.
With further reference to Fig. 2, data flow transmission method provided in an embodiment of the present invention can also include the steps：
Step 208, media forwarding unit cache the data flow that the terminal A is sent.
Wherein, the data flow that media forwarding unit is sent in reception terminal A by WIFI network, and to the terminal A's
It, can be in the local cache data flow when called terminal B forwards the data flow.Wherein, the duration of the data flow of caching can be with
It is determined according to the media forwarding unit buffer memory capacity of itself.Step 208 can be performed simultaneously with above-mentioned steps 205.
In addition, media forwarding unit can also cache the data packet that terminal A is retransmitted by LTE network.
Step 209, media forwarding unit receive the retransmission request that terminal B is sent, and being carried in the retransmission request needs weight
The sequence number of the data packet of biography.
Receiving devices (or be end-equipment) of the terminal B as data flow, can be in the data in finding data flow
During packet loss, retransmission request is sent to terminal A (source equipment), notice terminal A needs to retransmit data packet.Wherein, which please
Asking can also be sent by RTCP messages, and there are correspondences with rtp streaming for RTCP messages.
Step 210, sequence number of the media forwarding unit in retransmission request are obtained from the data flow of caching needs weight
The data packet of biography sends the data packet for needing to retransmit to terminal B.
Compared with prior art, the present embodiment is forwarded since the terminal B retransmission requests sent can pass through media forwarding unit,
Thus media forwarding unit can intercept the retransmission request of terminal B transmissions, then the sequence number and data in retransmission request
Traffic identifier obtains the data packet for needing to retransmit from the data flow of local cache, and the data packet for needing to retransmit is sent to terminal B,
Thus retransmission request to terminal A there is no need to forward again, and terminal A does not need to carry out the re-transmission of data packet, and the data packet of re-transmission can
To give terminal B by media forwarding unit Fast retransmission, the fluency of VoWIFI business is further increased.
Referring to Fig. 3, Fig. 3 is the flow chart of data flow transmission method provided by Embodiment 2 of the present invention.
In the present embodiment, terminal A is currently in the range of LTE network covering, and terminal A accesses LTE nets by base station
Network, PGW can be that terminal A distributes VOLTE business corresponding access point name IMS APN1, while use and be somebody's turn to do for the terminal distribution
IP address IP1 during IMS APN1.In the present embodiment, the corresponding users of terminal A contracted WIFI network and LTE network connection
The business (or being multichannel business) of transmitting data stream is closed, the process of terminal access LTE network includes the action of network registry.
After the completion of terminal network registration, media forwarding unit (such as SBC or PGW) would know that active user has contracted multichannel
The information of business.
As shown in figure 3, data flow transmission method provided by Embodiment 2 of the present invention includes the following steps：
After step 301, terminal A are linked into WIFI network, its IMS APN on an LTE network is kept.
In the present embodiment, terminal is after WIFI network and LTE network is linked into, and keeps its VOLTE on an LTE network
There are many modes for the access point name (IMS APN) of business：
1) for terminal A after WIFI network is linked into, PGW is the access point name IMS that terminal A distributes VOWIFI business
It is IP1 that APN1, terminal A, which use the IP address during IMS APN1,.Terminal A in the present embodiment is not related to after WIFI network is accessed
The IMS APN1 in LTE network are closed, and the request message for increasing IP address is sent to media forwarding unit, and then media forwarding is set
The standby IP address IP2 (such as IP2 is sent to terminal A) used terminal A distribution VOLTE business, i.e. IMS APN1 are right simultaneously
Answer two IP address IP1 and IP2.Terminal A uses IMS APN1 using VOWIFI business and VOLTE business.
2) for terminal A after WIFI network is linked into, PGW is the access point name IMS that terminal A distributes VOWIFI business
It is IP1 that APN1, terminal A, which use the IP address during IMS APN1,.Terminal A in the present embodiment can be with when accessing WIFI network
Initial access point name, i.e. IMS APN1 are closed, the IMS APN2, PGW then re-established in LTE network is newly-established
IMS APN2 distribution IP address is IP2, i.e. terminal A is on an LTE network IP2 using the corresponding IP address of VOLTE business.
3) for terminal A after WIFI network is linked into, PGW establishes a new APN2, and distribute VOWIFI business for terminal A
IP address IP2.The IMS APN1, PGW that terminal A in the present embodiment is not closed after WIFI network is accessed in LTE network be
UE is assigned with two different IMS APN.IP address when terminal is using IMS APN1 in LTE network is IP1, uses WIFI
IP address during IMS APN2 on network is IP2.
After above-mentioned three kinds of modes can realize that terminal A is linked into WIFI network, its IMS on an LTE network is kept
APN, and then maintain the channel that terminal uses VOLTE business on an LTE network.Due to terminal initiate VOLTE business and
VOWIFI business uses different IMS APN, thus terminal can be led to using VOLTE service channels and VOWIFI business simultaneously
Road.
Step 302, terminal A initiate to the VOWIFI of opposite equip. to call by WIFI network.
Step 303, media forwarding unit send instruction message to the gateway that terminal A is accessed, and indicate the service network
It is that the terminal reserves bearing resource to close in the LTE network.
Wherein, the implementation procedure phase of the step 202-203 in the specific implementation procedure and above-described embodiment of step 302-303
Together, details are referring to above-described embodiment, and details are not described herein.
Step 304, terminal A send multichannel to media forwarding unit and establish request, for being established with media forwarding unit
Multi transmission channel.
Wherein, multichannel establishes two IP address (IP1, IP2) of carried terminal and the mark of user in request.It should ask
The purpose asked is for asking to establish multi transmission channel with media forwarding unit.Multi transmission channel is specifically as follows multichannel RTP
(Multi path RTP, MPRTP).
Step 305, media forwarding unit and terminal A establish WIFI transmission channels and LTE transmission channel.
Due to after the completion of endpoint registration, media forwarding unit has learned that active user has contracted multichannel business,
Then media forwarding unit is after receiving multichannel and establishing request, and direct using terminal A is at two of WIFI network and LTE network
IP address and terminal A establish two transmission channels：LTE transmission channel and WIFI transmission channels.More specifically, above-mentioned two transmission
Channel can be VOLTE transmission channels and VOWIFI transmission channels.
Step 306, terminal A are by WIFI network to media forwarding unit transmission data stream.
The data flow that step 307, media forwarding unit monitoring terminal A are sent by WIFI network, determines the data flow
The middle data packet for needing to retransmit.
Step 308, media forwarding unit send retransmission notice message by LTE network to terminal A, and the retransmission notice disappears
The serial number of data packet for needing to retransmit is carried in breath.
Step 309, terminal A need the serial number of data packet that retransmits to obtain data packet and described in passing through from local according to described
LTE network sends the data packet for needing to retransmit to the media forwarding unit.
Step 310, media forwarding unit cache the data flow that the terminal A is sent.
Step 311, media forwarding unit receive the retransmission request that terminal B is sent, and being carried in the retransmission request needs weight
The sequence number of the data packet of biography.
Step 312, sequence number of the media forwarding unit in retransmission request obtain need from the data flow of the caching
The data packet to be retransmitted sends the data packet for needing to retransmit to terminal B.
Wherein, the implementation procedure phase of the step 204-210 in the specific implementation procedure and above-described embodiment of step 306-312
Together, details are referring to above-described embodiment, and details are not described herein.
Referring to Fig. 4, Fig. 4 is the flow chart for the data flow transmission method that the embodiment of the present invention three provides.
In the present embodiment, terminal A is currently in the range of LTE network covering, and terminal accesses LTE nets by base station
Network, PGW can be the corresponding IP address of terminal distribution VOLTE business, such as IP3.
In the present embodiment, the corresponding users of terminal A have contracted WIFI network and LTE network joint transmission data flow
Business (or being multichannel business), the process of terminal access LTE network include the action of network registry.It is completed in endpoint registration
Afterwards, media forwarding unit (such as SBC or PGW) would know that active user has contracted the information of multichannel business.
When terminal is entered in the range of LTE network and WIFI network covering, the data of the offer of the embodiment of the present invention three
Flow transferring method includes the following steps：
Step 401, terminal are linked into WIFI network, close its IMS APN on an LTE network.
In the present embodiment, terminal A is linked into WIFI network by AP, and WIFI network can provide VOWIFI business, PGW
For the IP address IP3 of terminal distribution VOWIFI business, the VOLTE service channels in (or release) LTE network are simultaneously closed off, are closed
The process of VOLTE service channels includes closing the access point name IMS APN that VOLTE service channels use.Since terminal A is current
LTE network is also accessed, when closing VOLTE service channels, LTE APN can't be closed terminal A.The LTE APN can make
The access point name of common data service is used for terminal, such as accesses Internet, PGW is after terminal A accesses LTE network
The data service common for the terminal distribution corresponding IP address IP4, IP3 and IP4 are different.
In addition, terminal A, after access LTE network and WIFI network, media forwarding unit is according to the current access of terminal
It is mostly logical that the user signing contract information obtained in type (WIFI is accessed and LTE accesses) determining and registration process determines that the terminal is supported
Road (channel is referred to as path) accesses.
Step 402, terminal A initiate to the VOWIFI of opposite equip. to call by WIFI network.
Wherein, the step 302 in the implementation procedure and above-described embodiment of step 402 is identical, and details are not described herein.
Step 403, terminal A send multichannel to media forwarding unit and establish request, for being established with media forwarding unit
Multi transmission channel.
Wherein, multichannel establishes two IP address (IP3, IP4) of carried terminal A and the mark of user in request.It is more
Transmission channel is specifically as follows multichannel RTP.
Step 404, media forwarding unit and terminal A establish WIFI transmission channels and LTE transmission channel.
Due to after the completion of endpoint registration, media forwarding unit has learned that active user has contracted multichannel business,
Then media forwarding unit is after receiving multichannel and establishing request, and direct using terminal A is at two of WIFI network and LTE network
IP address (IP3 and IP4) establishes two transmission channels with terminal A：LTE transmission channel and WIFI transmission channels.More specifically, on
It can be LTE data traffic transmissions channel and VOWIFI transmission channels to state two transmission channels.
Step 405, terminal A are by WIFI network to media forwarding unit transmission data stream.
The data flow that step 406, media forwarding unit monitoring terminal A are sent by WIFI network, determines the data flow
The middle data packet for needing to retransmit.
Wherein, the implementation procedure of step 405-406 is identical with the step 306-307 in above-described embodiment, no longer superfluous herein
It states.
Step 407, media forwarding unit send retransmission notice message by LTE APN to terminal A, and the retransmission notice disappears
The serial number of data packet for needing to retransmit is carried in breath.
Since terminal has accessed LTE network and WIFI network simultaneously, media forwarding unit can be by LTE network
LTE APN send retransmission notice message to terminal A, and the destination address of the notification message can be above-mentioned IP4, which can
To be sent to terminal using RTCP messages.Terminal A receives the retransmission notice message that media forwarding unit is sent by LTE network.
Step 408, terminal A need the serial number of data packet that retransmits to obtain data packet and described in passing through from local according to described
LTE network sends the data packet for needing to retransmit to the media forwarding unit.
Terminal is after RTPC messages are received, you can determines corresponding rtp streaming according to RTCP messages.Due to retransmission notice message
Middle to carry the serial number of data packet for needing to retransmit, then terminal A from the local data packet for obtaining caching and can lead to according to the serial number
It crosses the corresponding bearing resources of LTE APN in LTE network to retransmit to media forwarding unit, media forwarding unit receives the number of re-transmission
It is forwarded, and then terminal B can receive the data packet of re-transmission according to backward terminal B is wrapped.
Compared with prior art, the media forwarding unit of the embodiment of the present invention is sent out in monitoring user terminal by WIFI network
During the data flow sent, if it is determined that the data packet in data flow needs to retransmit, then is sent and retransmitted to user terminal by LTE APN
Notification message retransmits data packet, since LTE network is opposite according to the retransmission notice message convenient for user terminal on LTE APN
It in the presence service quality assurance of WIFI network, thus retransmits data packet and the probability reduction of packet loss occurs, improve terminal use
The fluency of VOWIFI business.In addition, relative to terminal in above-described embodiment after WIFI network is accessed, need to keep VOLTE
The IMS APN that business uses, terminal does not need to continue to keep IMS APN, directly profit after WIFI network is accessed in the present embodiment
Data packet retransmission is carried out with existing LTE APN, saves terminal and the resource of network, it is also smaller to the improvement of terminal.
With further reference to Fig. 4, data flow transmission method provided in an embodiment of the present invention further includes following steps：
Step 409, media forwarding unit cache the data flow that the terminal A is sent.
Step 410, media forwarding unit receive the retransmission request that terminal B is sent, and being carried in the retransmission request needs weight
The sequence number of the data packet of biography.
Step 411, sequence number of the media forwarding unit in retransmission request obtain need from the data flow of the caching
The data packet to be retransmitted sends the data packet for needing to retransmit to terminal B.
Wherein, the implementation procedure phase of the step 208-210 in the specific implementation procedure and above-described embodiment of step 409-411
Together, details are referring to above-described embodiment, and details are not described herein.
Referring to Fig. 5, Fig. 5 is the structure diagram for the media forwarding unit that the embodiment of the present invention four provides.
Wherein, the media forwarding unit can be PGW shown in FIG. 1 or SBC.Media forwarding unit employs general
Computer hardware, including processor 501, memory 502, bus 503, input equipment 504, output equipment 505 and network
Interface 506.
Specifically, memory 502 can include the computer storage matchmaker in the form of volatibility and or nonvolatile memory
Body, such as read-only memory and/or random access memory.Memory 502 can store an operating system, application program, other journeys
Sequence module, executable code and program data.
Input equipment 504 can be used for inputting order and information to media forwarding unit, and input equipment 504 such as keyboard or refers to
To equipment, as mouse, trace ball, touch tablet, microphone, control stick, game mat, circle benzvalene form satellite tv antenna, scanner or
Similar devices.These input equipments can be connected to processor 501 by bus 503.
Output equipment 505 can be used for media forwarding unit output information, and in addition to the monitor, output equipment 505 is also
Can be that other periphery outputs are set respectively, such as loud speaker and/or printing device, these output equipments can also be connected by bus 503
It is connected to processor 501.
Media forwarding unit can be connected to by network interface 506 in network, such as is connected to LAN (Local
Area Network, LAN).Under networked environment, the computer executed instructions stored in media forwarding unit can be stored in far
In journey storage device, and it is not limited to be locally stored.
When the processor 501 in media forwarding unit performs the executable code stored in memory 502 or application program
When, media forwarding unit can perform the method and step of the media forwarding unit side in above example one to three, such as hold
Row step 203,205-206,208-210,303,305,307-308,310-312,404,406-407,409-411 etc..Specifically
Implementation procedure and advantageous effect are referring to above-mentioned related embodiment, and details are not described herein.
Referring to Fig. 6, Fig. 6 is the structure diagram for the terminal that the embodiment of the present invention five provides.
Wherein, the terminal can be terminal A shown in FIG. 1 or terminal B.Terminal mainly includes processor 601, memory
602nd, bus 603, input equipment 604, output equipment 605 and network interface 606.
Specifically, memory 602 can include the computer storage matchmaker in the form of volatibility and or nonvolatile memory
Body, such as read-only memory and/or random access memory.Memory 602 can store an operating system, application program, other journeys
Sequence module, executable code and program data.
Input equipment 604 can be used for terminal input command and information, input equipment 604 such as keyboard or sensing equipment,
Such as mouse, trace ball, touch tablet, microphone, control stick, game mat, circle benzvalene form satellite tv antenna, scanner similar are set
It is standby.These input equipments can be connected to processor 601 by bus 603.
Output equipment 605 can be used for media forwarding unit output information, and in addition to the monitor, output equipment 605 is also
Can be that other periphery outputs are set respectively, such as loud speaker, these output equipments can also be connected to processor 601 by bus 603.
Terminal can be connected to by network interface 606 in network, for example, by wireless interface be connected to WIFI network and
LTE network.Under networked environment, the computer executed instructions stored in terminal can be stored in remote storage device, without
It is limited to be locally stored.
When the processor 601 in terminal performs the executable code stored in memory 602 or application program, terminal can
To perform the method and step of the terminal side in above example one to three, such as perform step 201-202,204,207,301-
302nd, 304,306,309,401-403,405,408 etc..Specific implementation procedure and advantageous effect referring to above-mentioned related embodiment,
This is repeated no more.
Referring to Fig. 7, Fig. 7 is the functional schematic for the media forwarding unit that the embodiment of the present invention six provides.
As shown in the figure, media forwarding unit provided in an embodiment of the present invention includes：
Forwarding data flow module 710, for receiving the data flow that terminal is sent by Wireless Fidelity WIFI network, and to institute
It states the corresponding opposite equip. of terminal and forwards the data flow.
Monitoring modular 720 for monitoring the data flow that the terminal is sent by the WIFI network, determines the data
The data packet retransmitted is needed in stream；Specifically, the monitoring modular 720 in media forwarding unit determines to need what is retransmitted in data flow
Data packet can include：The monitoring modular obtains the data of loss in the data-bag lost in monitoring the data flow
The sequence number of packet.
It notifies sending module 730, retransmission notice message, institute is sent to the terminal for passing through long term evolution LTE network
It states and the serial number of data packet for needing to retransmit is carried in retransmission notice message.
Media forwarding unit provided in an embodiment of the present invention can be used in preceding method embodiment one to three, passed through
Embodiment is completed in cooperation between above-mentioned forwarding data flow module 710, monitoring modular 720 and notice sending module 730
First, the method and step of the media forwarding unit side in two and three.Forwarding data flow module 710, monitoring mould in the present embodiment
Block 720 and notice sending module 730 can realize other functions of media forwarding unit in above method embodiment, herein not
It repeats again.
Compared with media forwarding unit of the prior art, media forwarding unit provided in this embodiment is performing data flow
During transmission, there is the advantageous effect identical with preceding method embodiment.
With further reference to Fig. 7, media forwarding unit provided in an embodiment of the present invention can also include：
Sending module 740 is indicated, for the data flow sent in 720 monitor terminal of monitoring module by WIFI network
Before, instruction message is sent to the gateway that the terminal accesses, it is institute in the LTE network to indicate the gateway
It states terminal and reserves bearing resource.
Cache module 750, for caching the data flow that the terminal is sent；
Retransmission module 760, for receiving the retransmission request that the corresponding opposite equip. of the terminal is sent, the retransmission request
Middle carry needs the sequence number of data packet that retransmits, and then the sequence number in the retransmission request is from the data of the caching
The data packet for needing to retransmit is obtained in stream, the data packet for needing to retransmit is sent to the opposite equip..
In the present embodiment, instruction sending module 740, cache module 750 and the re-transmission mould that media forwarding unit increases newly
Advantageous effect caused by block 760 referring to correlation step in above method embodiment description.In addition, the media in the present embodiment
Forwarding unit is presented in the form of functional unit, and " unit " here can refer to application-specific integrated circuit
(application-specific integrated circuit, ASIC), the one or more softwares of execution or firmware program
Processor and memory, integrated logic circuit and/or other the device of above-mentioned function can be provided.In a simple implementation
In example, the media forwarding unit that those skilled in the art is contemplated that in the present embodiment can also use hardware shown in fig. 5
Form is realized.Forwarding data flow module 710, monitoring modular 720 notify sending module 730, instruction sending module 740, caching
The function that module 750 and retransmission module 760 are realized can be by the processor 501 in Fig. 5 and memory 502 come real
It is existing.For example, forwarding data flow module 710 receives the data flow that is sent by Wireless Fidelity WIFI network of terminal, and to the end
Corresponding opposite equip. is held to forward the data flow can be by performing the code stored in memory 502 by processor 501
To realize.
Referring to Fig. 8, Fig. 8 is the functional schematic for the terminal that the embodiment of the present invention seven provides.
As shown in the figure, terminal provided in an embodiment of the present invention includes：
AM access module 810, for accessing long term evolution LTE network and Wireless Fidelity WIFI network；
Sending module 820, for by the WIFI network to media forwarding unit transmission data stream；
Receiving module 830 is notified, for receiving the retransmission notice of the media forwarding unit transmission by the LTE network
Message carries the serial number of data packet for needing to retransmit in the retransmission notice message.
Wherein, above-mentioned sending module 820 is additionally operable to obtain number from local according to the serial number of data packet for needing to retransmit
According to the data packet wrapped and retransmitted by the LTE network to the media forwarding unit transmission needs.
Terminal provided in an embodiment of the present invention can be used in preceding method embodiment one to three, connect by above-mentioned
Enter the cooperation between module 810, sending module 820 and notice receiving module 830 to complete the end in embodiment one, two and three
Hold the method and step of side.AM access module 810, sending module 820 in the present embodiment and notice receiving module 830 can be with
Realize other functions of terminal in above method embodiment, details are not described herein.
Compared with media forwarding unit of the prior art, media forwarding unit provided in this embodiment is performing data flow
During transmission, there is the advantageous effect identical with preceding method embodiment.
With further reference to Fig. 8, terminal provided in an embodiment of the present invention further includes：
Keep module 840, for the sending module by WIFI network to media forwarding unit transmission data stream it
Before, keep its IP multimedia subsystem Access Point Name in the LTE network after the terminal accesses the WIFI network
Claim.
Module 850 is rebuild, for sending number to media forwarding unit by WIFI network in the sending module of the terminal
Before stream, and the terminal closes the IMS access point name in LTE network, Ran Hou after the WIFI network is linked into
IMS access point name is re-established in the LTE network.
In the present embodiment, terminal increases newly holding module 840 rebuilds advantageous effect caused by module 850 referring to upper
State the description of correlation step in embodiment of the method.
In addition, media forwarding unit, terminal in above-described embodiment six and seven is presented in the form of functional unit
, " unit " here can refer to application-specific integrated circuit, perform one or more softwares or firmware program processor and
Memory, integrated logic circuit and/or other the device of above-mentioned function can be provided.Those skilled in the art is contemplated that
Media forwarding unit in the present embodiment can also be realized using example, in hardware shown in fig. 5.Forwarding data flow module 710,
Monitoring modular 720, notifies sending module 730, and instruction sending module 740, cache module 750 and retransmission module 760 are realized
Function can be realized by the processor 501 in Fig. 5 and memory 502.For example, forwarding data flow module 710 receives
The data flow that terminal is sent by Wireless Fidelity WIFI network, and forward the data flow to the corresponding opposite equip. of the terminal
It can be by being realized by processor 501 to perform the code stored in memory 502.
Those skilled in the art be contemplated that terminal in the present embodiment can also using example, in hardware shown in fig. 6 come
It realizes.AM access module 810, notice receiving module 830, keeps module 840 and reconstruction module 850 to be realized at sending module 820
Function can be realized by the processor 601 in Fig. 6 and memory 602.For example, notice receiving module 830 passes through institute
It states LTE network and receives the retransmission notice message that the media forwarding unit is sent, being carried in the retransmission notice message needs weight
The serial number of the data packet of biography then can be by being realized by processor 601 to perform the code stored in memory 602.
The above description is merely a specific embodiment, but protection scope of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can readily occur in change or replacement, should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (17)
1. a kind of data flow transmission method, applied to media forwarding unit, the media forwarding unit reception terminal passes through wireless
The data flow that fidelity WIFI network is sent, and forward the data flow to the corresponding opposite equip. of the terminal, which is characterized in that
It further includes：
The data flow that the terminal is sent by the WIFI network is monitored, determines the data for needing to retransmit in the data flow
Packet；
Retransmission notice message is sent to the terminal by long term evolution LTE network, carry in the retransmission notice message described in
Need the serial number of data packet retransmitted.
2. the according to the method described in claim 1, it is characterized in that, data sent in the monitor terminal by WIFI network
It is further included before stream：
The gateway accessed to the terminal sends instruction message, and it is institute in the LTE network to indicate the gateway
It states terminal and reserves bearing resource.
3. method according to claim 1 or 2, which is characterized in that need the data packet retransmitted in the determining data flow
Including：
In the data-bag lost in monitoring the data flow, the sequence number of the data packet of loss is obtained.
4. method according to claim 1 or 2, which is characterized in that described to determine to need the number retransmitted in the data flow
Include according to packet：
When the transmission quality for monitoring the data flow is less than preset value, the sequence number of data packet for needing to retransmit is obtained.
5. it according to the method described in claim 3, it is characterized in that, further includes：
Cache the data flow that the terminal is sent；
The retransmission request that the corresponding opposite equip. of the terminal is sent is received, the data for needing to retransmit are carried in the retransmission request
The sequence number of packet；
Sequence number in the retransmission request is obtained from the data flow of the caching needs the data packet that retransmits, to described
Opposite equip. sends the data packet for needing to retransmit.
6. a kind of data flow transmission method, applied to terminal, the terminal access long term evolution LTE network and Wireless Fidelity WIFI
Network and by the WIFI network to media forwarding unit transmission data stream, which is characterized in that including：
The retransmission notice message that the media forwarding unit sends is received by the LTE network, in the retransmission notice message
Carry the serial number of data packet for needing to retransmit；
According to it is described need the serial number of data packet that retransmits from it is local obtain data packet and by the LTE network to the media
Forwarding unit sends the data packet for needing to retransmit.
7. according to the method described in claim 6, it is characterized in that, in the terminal by WIFI network to media forwarding unit
It is further included before transmission data stream：
The terminal keeps its IP multimedia subsystem Access Point Name in the LTE network after the WIFI network is accessed
Claim.
8. the method according to the description of claim 7 is characterized in that IP multimedia of the terminal on LTE network is kept
During system access point title, the request message for increasing IP address is sent to the media forwarding unit by the LTE network.
9. according to the method described in claim 6, it is characterized in that, in the terminal by WIFI network to media forwarding unit
It is further included before transmission data stream：
The terminal closes the IMS access point name in LTE network, then in the LTE after the WIFI network is linked into
IMS access point name is re-established on network.
10. according to the method described in claim 6, it is characterized in that, the terminal is set by LTE network to media forwarding
Preparation send the data packet for needing to retransmit to include：
After VOLTE service channels of the terminal on LTE network is closed, pass through the LTE access point name in the LTE network
The data packet for needing to retransmit is sent to the media forwarding unit.
11. a kind of media forwarding unit, which is characterized in that including：
Forwarding data flow module, for receiving the data flow that terminal is sent by Wireless Fidelity WIFI network, and to the terminal
Corresponding opposite equip. forwards the data flow；
Monitoring modular for monitoring the data flow that the terminal is sent by the WIFI network, determines to need in the data flow
The data packet to be retransmitted；
It notifies sending module, sends retransmission notice message to the terminal for passing through long term evolution LTE network, described retransmit is led to
Know and the serial number of data packet for needing to retransmit is carried in message.
12. media forwarding unit according to claim 11, which is characterized in that further include：
Sending module is indicated, for before the data flow that is sent in the monitoring module monitor terminal by WIFI network, to institute
The gateway for stating terminal access sends instruction message, and it is that the terminal is pre- in the LTE network to indicate the gateway
Stay bearing resource.
13. the media forwarding unit according to claim 11 or 12, which is characterized in that the inspection module determines data flow
The middle data packet for needing to retransmit includes：
The monitoring modular obtains the sequence number of the data packet of loss in the data-bag lost in monitoring the data flow.
14. the media forwarding unit according to claim 11 or 12, which is characterized in that further include：
Cache module, for caching the data flow that the terminal is sent；
Retransmission module for receiving the retransmission request that the corresponding opposite equip. of the terminal is sent, carries in the retransmission request
The sequence number of data packet retransmitted is needed, then the sequence number in the retransmission request is obtained from the data flow of the caching
The data packet that needs retransmit is taken, the data packet for needing to retransmit is sent to the opposite equip..
15. a kind of terminal, which is characterized in that including：
AM access module, for accessing long term evolution LTE network and Wireless Fidelity WIFI network；
Sending module, for by the WIFI network to media forwarding unit transmission data stream；
Receiving module is notified, for receiving the retransmission notice message of the media forwarding unit transmission, institute by the LTE network
State the serial number of data packet for being carried in retransmission notice message and needing to retransmit；
The sending module is additionally operable to obtain data packet from local according to the serial number of data packet for needing to retransmit and passes through institute
It states LTE network and sends the data packet for needing to retransmit to the media forwarding unit.
16. terminal according to claim 15, which is characterized in that further include：
Keep module, for the sending module by WIFI network before media forwarding unit transmission data stream, in institute
It states terminal and accesses the IP multimedia subsystem access point name for keeping it in the LTE network after the WIFI network.
17. terminal according to claim 15, which is characterized in that further include：
Reconstruction unit, for the sending module of the terminal by WIFI network to media forwarding unit transmission data stream it
Before, and the terminal closes the IMS access point name in LTE network, then described after the WIFI network is linked into
IMS access point name is re-established in LTE network.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611225052.4A CN108243474A (en) | 2016-12-27 | 2016-12-27 | Data flow transmission method, apparatus and system |
| PCT/CN2017/117549 WO2018121384A1 (en) | 2016-12-27 | 2017-12-20 | Data stream transmission method, apparatus and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611225052.4A CN108243474A (en) | 2016-12-27 | 2016-12-27 | Data flow transmission method, apparatus and system |
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| CN113783667A (en) * | 2021-01-05 | 2021-12-10 | 北京沃东天骏信息技术有限公司 | Information transmission method, device, computer system and computer readable storage medium |
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