CN106209915A - A kind of real time flow medium radio transmitting method and system thereof - Google Patents
A kind of real time flow medium radio transmitting method and system thereof Download PDFInfo
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- CN106209915A CN106209915A CN201610796143.7A CN201610796143A CN106209915A CN 106209915 A CN106209915 A CN 106209915A CN 201610796143 A CN201610796143 A CN 201610796143A CN 106209915 A CN106209915 A CN 106209915A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
- H04L65/75—Media network packet handling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/80—Responding to QoS
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The present invention relates to a kind of real time flow medium radio transmitting method and system thereof, in the method, sending module fetches data from transmission data buffer zone successively according to preset data bag size, and package mails to receiver module, again the packet being successfully transmitted is stored in history transmission relief area；Receiver module is inserted into the first order and receives relief area after being rearranged by the packet received；Receive packet loss judge module to receive relief area from the first order and fetch data bag, judge whether to there occurs packet loss according to bag sequence number, once confirm to there occurs packet loss, then to sending re-transmission confirmation module transmission repeat requests, the packet of re-transmission to be received such as then, until beyond Preset Time；Send to retransmit and confirm that module receives repeat requests, from request bag, take out packet loss, and judge whether to retransmit the packet of this loss according to current RTT.The present invention can be effectively improved the scheme of wireless Real-Time Speech Transmission packet loss, and data transmission bauds is fast, reliability is high.
Description
Technical field
The present invention relates to data transmission method and system thereof, be specifically related to a kind of real time flow medium radio transmitting method and
System.
Background technology
WLANs based on 802.11, due to wireless communication link often by signal fadeout, other be wirelessly transferred interference
Etc. the impact of factor, cause wireless link unstable, easily cause packet packet loss phenomenon.At present, major part real-time audio passes
Communication system uses host-host protocol based on UDP to transmit media data packet, but due to the integrity problem of agreement own, network-like
There will be packet loss and shake in the case of state is the best, fail to reach good real-time play effect；Also there is part real-time audio system
System employing host-host protocol based on TCP, but the wireless network being not suitable for there is the bigger bit error rate and Bandwidth-Constrained because of it, wireless
During channel burst exception, by continuous retransmission data bag, the real-time both having destroyed Streaming Media also exacerbates network congestion.
Tradition audio amplifier uses wired access way, greatly limits the use scene of user, such as multichannel cincture
System buildup needs to lay a large amount of voice band line, and laying cost is high, it is the biggest to implement difficulty.Along with the development of Internet of Things, nothing
Line intelligent sound box gradually comes into the life of people, and the enforcement for Multi sound track type around sound box system provides new thinking.Wireless intelligence
In energy sound box system, many rooms are play as a new application scenarios, are increasingly favored by user.Broadcasting of many room audio group
Mode playback is to push voice data to all from equipment by a main equipment, enables the broadcasting sound that principal and subordinate's audio amplifier synchronizes simultaneously
Happy, in order to be able to accomplish to synchronize to play glibly simultaneously, it is necessary between audio amplifier, to carry out stable data transmission.
The major way of data transmission at present has two kinds, and one is stream media protocol based on TCP, number in this manner
Higher according to transmission reliability, but due to wireless network environment poor anti jamming capability, packet loss high, in network unexpected abnormality
Time, can be mistakenly considered to occur congested and cause real-time performance poor.Two is to use real-time stream media protocol based on UDP, according to this
Kind of mode data transmission bauds is fast, generally also can provide real-time bandwidth information so as transmitting terminal regulation streaming coding rate or
Data transmission rate, but the transmission of infallible data is not provided due to agreement, occur to be easy to cause real-time audio to spread during packet loss
Putting card, Consumer's Experience is poor.
Summary of the invention
For solving above-mentioned deficiency of the prior art, it is an object of the invention to provide one and can be effectively improved wireless real-time sound
Keep pouring in real time flow medium radio transmitting method and the system thereof of defeated packet loss scheme.
It is an object of the invention to use following technical proposals to realize:
The present invention provides a kind of real time flow medium radio transmitting method, and it thes improvement is that, when transmitting terminal number with
During the number one_to_one corresponding of receiving terminal, described method comprises the steps:
Step 101: transmitting terminal and receiving terminal set up realaudio data passage；
Step 102: receiver module monitors realaudio data passage, the voice data that receiving end/sending end sends；
Step 103: receiving terminal judges when the packet loss of packets of audio data occurs, is fed back by packet loss or retransmits passage notice and send out
Sending end；
Step 104: transmitting terminal resends the packet loss of packets of audio data to receiving terminal.
Further, in described step 101, realaudio data being buffered in band and sends relief area, transmitting terminal is by pending
Send voice data according to preset data unit, take out voice data successively, and voice data is numbered and package, by reality
Time voice data passage be sent to receiving terminal, and the packet sent kept in send buffer area into history.
Further, described preset data unit is less than MTU.
Further, in described step 102, if the packet of the voice data order that receives of receiving terminal and transmission is successively
When order is different, first order relief area is used to keep in the packets of audio data received, according to receiving the numbering of packets of audio data,
The packets of audio data received is rearranged.
Further, in described step 103, receiving terminal takes packets of audio data from first order relief area, works as when detecting
Front packets of audio data with previous discontinuous time, then it is assumed that there occurs packet loss phenomenon, fed back by packet loss or retransmits passage notify
Transmitting terminal, waits that the packet loss of transmitting terminal retransmission of audio packet is until time-out.
Further, in described step 104, after transmitting terminal receives the request of packet loss re-transmission of packets of audio data, solve
Separate out Base Serial Number and the number of missing of the packet loss of packets of audio data, send from history and relief area is taken out losing of packets of audio data
Bag, is sent to receiving terminal.
Further, when the corresponding multiple receiving terminal of a transmitting terminal, described step 103 and 104 is transformed to respectively:
Step 201: in the case of same transmitting terminal sends data to multiple receiving terminals, due to each receiving terminal and transmission
Between end, network communication status is different, causes each receiving terminal different in DRP data reception process sound intermediate frequency data-bag lost situation,
The packet loss feedback information obtaining each receiving terminal is different；Obtain the packet loss information of each receiving terminal respectively, fed back by packet loss or
Retransmit passage and be sent to transmitting terminal；
Step 202: transmitting terminal, according to receiving the packet loss feedback request of packets of audio data, parses corresponding receiving terminal, sound
Frequently the packet loss number of packet and Base Serial Number, sends data buffer zone from history and finds out the packets of audio data needing to retransmit, weight
Pass to the receiving terminal of correspondence.
The present invention also provides for a kind of real time flow medium wireless transmitting system, and it thes improvement is that, described system include into
The transmitting terminal of row data interaction and receiving terminal；
Described transmitting terminal includes: sending module and re-transmission confirm module；Described receiving terminal includes: receiver module and packet loss are sentenced
Disconnected module；
Described sending module is connected with receiver module by realaudio data passage；Described re-transmission confirms that module is by losing
Bag feedback or re-transmission passage are connected with described packet loss judge module.
Further, described sending module sends relief area for realaudio data is buffered in band, and transmitting terminal will be treated
Transmission voice data, according to preset data unit, takes out voice data successively, and is numbered voice data and package, pass through
Realaudio data passage is sent to receiving terminal, and the packet sent is kept in into history transmission buffer area；
Described receiver module is used for monitoring realaudio data passage, the packets of audio data that receiving end/sending end sends, and will
The packets of audio data received is inserted into the first order and receives relief area after rearranging；
Described packet loss judge module for taking packets of audio data from first order relief area, detection current audio data bag with
Previous discontinuous time, then it is assumed that there occurs frequency packet packet loss phenomenon, fed back by packet loss or retransmits passage notice transmission
End, waits that the packet loss of transmitting terminal retransmission of audio packet is until time-out；
Described re-transmission confirms that module is asked for the packet loss receiving retransmission of audio packet, takes out and lose from request bag
Bag, and judge whether to retransmit the packet of this loss according to current being wirelessly transferred.
Further, described preset data unit is less than MTU.
In order to some aspects of the embodiment disclosed are had a basic understanding, shown below is simple summary.Should
Summarized section is not extensive overview, is not key/critical component to be determined or the protection domain describing these embodiments.
Its sole purpose is to present some concepts, in this, as the preamble of following detailed description by simple form.
Compared with immediate prior art, the excellent effect that the technical scheme that the present invention provides has is:
During wireless real time streaming, receiving terminal is buffered by two-stage, first eliminates out of order situation, reduces by mistake
Situation about retransmitting.When receiving terminal finds packet loss, feeding back to transmitting terminal by express passway, transmitting terminal retransmits lost data packets.
The present invention, only in the case of there is packet loss, just can send packet loss feedback to transmitting terminal rather than periodically lead to
Know sender.Present invention employs two data passages, when real time flow medium passage generation packet loss, lead to a new transmission
Feed back/retransmit packet on road, there is higher real-time.
Accompanying drawing explanation
Fig. 1 is the structural representation of the real time flow medium wireless transmitting system of the first optimal technical scheme that the present invention provides
Figure；
Fig. 2 is the flow process when the corresponding multiple receiving terminal of a transmitting terminal of the second optimal technical scheme that the present invention provides
Figure.
Detailed description of the invention
Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is described in further detail.
The following description and drawings illustrate specific embodiments of the present invention fully, to enable those skilled in the art to
Put into practice them.Other embodiments can include structure, logic, electric, process and other change.Embodiment
Only represent possible change.Unless explicitly requested, otherwise individually assembly and function are optional, and the order operated is permissible
Change.The part of some embodiments and feature can be included in or replace part and the feature of other embodiments.This
The scope of bright embodiment includes the gamut of claims, and all obtainable equivalent of claims
Thing.In this article, these embodiments of the present invention can be represented by " inventing " individually or generally with term, and this is only
For convenience, and if in fact disclose the invention more than, it is not meant to automatically limit this application in the range of appointing
What single invention or inventive concept.
First optimal technical scheme:
As it is shown in figure 1, the knot of real time flow medium wireless transmitting system of the first optimal technical scheme provided for the present invention
Structure schematic diagram, technical solution of the present invention is according to systemic-function, including the transmitting terminal and the receiving terminal that carry out data interaction；
Described transmitting terminal includes: sending module and re-transmission confirm module；Described receiving terminal includes: receiver module and packet loss are sentenced
Disconnected module；Described sending module is connected with receiver module by realaudio data passage；Described re-transmission confirms that module is by losing
Bag feedback or re-transmission passage are connected with described packet loss judge module.
Sending module fetches data from transmission data buffer zone successively according to preset data bag size, and package mails to receive mould
Block, again the packet being successfully transmitted be stored in history send relief area；The packet received is arranged by receiver module again
It is inserted into the first order after row and receives relief area；Receive packet loss judge module to receive relief area from the first order and fetch data bag, according to bag
Sequence number seriality judges whether to there occurs packet loss, once confirms to there occurs packet loss, then retransmit to transmission and confirm that module transmission retransmits
Then request, the packet of re-transmission to be received such as, until beyond Preset Time；Send to retransmit and confirm that module receives re-transmission and asks
Ask, from request bag, take out packet loss, and judge whether to retransmit the packet of this loss according to current RTT (being wirelessly transferred).
The invention provides the transmission method of a kind of wireless real time flow medium.As it is shown in figure 1, contain following step
Suddenly.
Step 101: realaudio data is buffered in band send relief area, sending module by data to be sent according to preset
Data cell, takes out data successively, is numbered data, package, is sent to receiving terminal by realaudio data passage, and
The packet sent is kept in and sends buffer area into history.Wherein, preset data unit is less than MTU.
Step 102: receiver module monitors realaudio data passage, the data that receiving end/sending end sends.Wherein, receiving terminal
The data sequence received may be different from the packet sequencing of transmission.Such as, for the numbered packet of 0,1,2,
Transmitting terminal is according to 0, and the order of 1,2 sends successively.During actual transmissions, receiving terminal the most first receives the number of numbered 2
According to bag, the most just receive 0,1 packet.In order to effectively go back original sender data.Use first order relief area to keep in connect
The packet received, according to receiving the numbering of packet, rearranges the packet received.
Step 103: packet loss judge module fetches data bag from first order relief area, when detecting that current data packet is with previous
Individual discontinuous time, then it is assumed that there occurs packet loss, by packet loss feed back/retransmit passage notice transmitting terminal, wait transmitting terminal retransmit number
According to bag until time-out.
Step 104: transmitting terminal retransmits after confirming that module receives the request that packet loss retransmits, and parses the initial volume of packet loss
Number and number of missing, send from history and relief area taken out packet, be sent to receiving terminal.
Second optimal technical scheme:
As in figure 2 it is shown, the second optimal technical scheme of providing of the present invention when the corresponding multiple receiving terminal of transmitting terminal
Flow chart, particularly, when transmitting terminal only one of which, and the when that receiving terminal having a lot of, as shown in Figure 2.
Step 201: in the case of same transmitting terminal sends data to multiple receiving terminals, due to each receiving terminal and transmission
Between end, network communication status is different, and each receiving terminal data-bag lost situation in DRP data reception process may be caused different,
Thus the packet loss feedback information of the most each receiving terminal is different.Obtain the packet loss information of each receiving terminal respectively, anti-by packet loss
Feedback/re-transmission passage is sent to transmitting terminal.
Step 202: transmitting terminal, according to the packet loss feedback request received, parses concrete receiving terminal, packet loss number and rises
Begin numbering, sends data buffer zone from history and finds out the packet needing to retransmit, retransmits to corresponding receiving terminal.
The method machine system of the data transmission that the present invention provides, it is possible to be effectively improved wireless Real-Time Speech Transmission packet loss
Scheme.Data transmission bauds is fast, reliability is high.
Finally should be noted that: above example is only in order to illustrate that technical scheme is not intended to limit, to the greatest extent
The present invention has been described in detail by pipe with reference to above-described embodiment, and those of ordinary skill in the field still can be to this
Bright detailed description of the invention is modified or equivalent, these without departing from spirit and scope of the invention any amendment or
Equivalent, within the claims of the present invention all awaited the reply in application.
Claims (10)
1. a real time flow medium radio transmitting method, it is characterised in that when transmitting terminal number and receiving terminal number one by one
Method described during correspondence is comprised the steps:
Step 101: transmitting terminal and receiving terminal set up realaudio data passage；
Step 102: receiver module monitors realaudio data passage, the voice data that receiving end/sending end sends；
Step 103: receiving terminal judges when the packet loss of packets of audio data occurs, is fed back by packet loss or retransmits passage notice transmission
End；
Step 104: transmitting terminal resends the packet loss of packets of audio data to receiving terminal.
2. real time flow medium radio transmitting method as claimed in claim 1, it is characterised in that in described step 101, will in real time
Voice data is buffered in band and sends relief area, and voice data to be sent according to preset data unit, is taken out sound by transmitting terminal successively
Frequency evidence, and voice data is numbered and package, it is sent to receiving terminal by realaudio data passage, and transmission
Packet is kept in and is sent buffer area into history.
3. real time flow medium radio transmitting method as claimed in claim 2, it is characterised in that described preset data unit is less than
MTU.
4. real time flow medium radio transmitting method as claimed in claim 1, it is characterised in that in described step 102, if receiving
When the voice data order that receives of termination is different from the packet sequencing of transmission, uses first order relief area to keep in and receives
Packets of audio data, according to receiving the numbering of packets of audio data, the packets of audio data received is rearranged.
5. real time flow medium radio transmitting method as claimed in claim 1, it is characterised in that in described step 103, receiving terminal
From first order relief area, take packets of audio data, when detect current audio data bag with previous discontinuous time, then it is assumed that send out
Give birth to packet loss phenomenon, fed back by packet loss or retransmit passage notice transmitting terminal, waiting the packet loss of transmitting terminal retransmission of audio packet
Until time-out.
6. real time flow medium radio transmitting method as claimed in claim 1, it is characterised in that in described step 104, transmitting terminal
After receiving the request of packet loss re-transmission of packets of audio data, parse the Base Serial Number of the packet loss of packets of audio data and lose number
Mesh, sends the packet loss taking out packets of audio data relief area, is sent to receiving terminal from history.
7. real time flow medium radio transmitting method as claimed in claim 1, it is characterised in that when a transmitting terminal correspondence is multiple
During receiving terminal, described step 103 and 104 is transformed to respectively:
Step 201: same transmitting terminal sends in the case of data to multiple receiving terminals, due to each receiving terminal and transmitting terminal it
Between network communication status different, cause each receiving terminal different in DRP data reception process sound intermediate frequency data-bag lost situation, obtain
The packet loss feedback information of each receiving terminal is different；Obtain the packet loss information of each receiving terminal respectively, fed back by packet loss or retransmit
Passage is sent to transmitting terminal；
Step 202: transmitting terminal, according to receiving the packet loss feedback request of packets of audio data, parses corresponding receiving terminal, audio frequency number
According to packet loss number and the Base Serial Number of bag, sending data buffer zone from history and find out the packets of audio data needing to retransmit, re-transmission is given
Corresponding receiving terminal.
8. a real time flow medium wireless transmitting system, it is characterised in that described system includes the transmitting terminal carrying out data interaction
And receiving terminal；
Described transmitting terminal includes: sending module and re-transmission confirm module；Described receiving terminal includes: receiver module and packet loss judge mould
Block；
Described sending module is connected with receiver module by realaudio data passage；Described re-transmission confirms that module is anti-by packet loss
Feedback or re-transmission passage are connected with described packet loss judge module.
9. real time flow medium wireless transmitting system as claimed in claim 8, it is characterised in that described sending module is for by real
Time voice data be buffered in band send relief area, voice data to be sent according to preset data unit, is taken out by transmitting terminal successively
Voice data, and voice data is numbered and package, it is sent to receiving terminal by realaudio data passage, and sending
Packet keep in into history send buffer area；
Described receiver module is used for monitoring realaudio data passage, the packets of audio data that receiving end/sending end sends, and will receive
To packets of audio data rearrange after be inserted into the first order receive relief area；
Described packet loss judge module is for taking packets of audio data from first order relief area, and detection current audio data bag is with previous
Individual discontinuous time, then it is assumed that there occurs frequency packet packet loss phenomenon, fed back by packet loss or retransmits passage notify transmitting terminal, etc.
The packet loss of sending end retransmission of audio packet pending is until time-out；
Described re-transmission confirms that module is asked for the packet loss receiving retransmission of audio packet, takes out packet loss from request bag, and
Judge whether to retransmit the packet of this loss according to current being wirelessly transferred.
10. real time flow medium wireless transmitting system as claimed in claim 9, it is characterised in that described preset data unit is little
In MTU.
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