CN104125161A - Data priority distinguishing multicast transmission method, data priority distinguishing multicast transmission system and data priority distinguishing multicast transmission device - Google Patents
Data priority distinguishing multicast transmission method, data priority distinguishing multicast transmission system and data priority distinguishing multicast transmission device Download PDFInfo
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Abstract
The invention provides a data priority distinguishing multicast transmission method, a data priority distinguishing multicast transmission system and a data priority distinguishing multicast transmission device. The data priority distinguishing multicast transmission method includes: setting transmitting modes for different data types at a data transmitting terminal in advance, wherein the sending modes are provided with priorities; acquiring data at the data transmitting terminal, searching the corresponding priorities according to the types of the data, inserting the data into a data transmitting sequence according to the priorities and marking the states of the data as not transmitted; processing the data in the data transmitting sequence one by one according to a high-to-low order of the priorities. The data priority distinguishing multicast transmission method, the data priority distinguishing multicast transmission system and the data priority distinguishing multicast transmission device have the advantages that priorities can be configured for different types of data flexibly, and thereby multicast transmission services in different priorities can be provided for different types of data.
Description
Technical field
The present invention relates to multicast transmission technical field, relate in particular to multicast transmission method, system and the device of distinguishing data priority.
Background technology
Existing multicasting technology has non-reliable ip multicast technology and reliable ip multicast technology.
Wherein, non-reliable ip multicast technology realizes the unreliable transmission of the data of one-to-many, and advantage is that to carry out the real-time of multicast transmission very good; Shortcoming is because link layer does not provide reliable mechanism, can have more serious packet loss, the non-constant of reliability of transfer of data, in addition in default of the adjusting to transmission rate or control, network occur congested in, can not continue to send in a large number data with respect to network congestion completely.
Reliable ip multicast technology has adopted the reliability mechanisms such as redundant data, data retransmission, realizes the reliability transmission of the data of one-to-many.
The no matter reliable ip multicast technology of right and wrong or reliable ip multicast technology, is not all the sending modes such as dissimilar data flexible configuration priority, and therefore the transmission service of different priorities cannot be provided for dissimilar data.
Summary of the invention
The invention provides a kind of multicast transmission method of distinguishing data priority, can be dissimilar data flexible configuration priority, thereby provides the multicast transmission service of different priorities for dissimilar data.
The present invention also provides system and the device of realizing the multicast transmission of distinguishing data priority, can be dissimilar data flexible configuration priority, thereby provides the multicast transmission service of different priorities for dissimilar data.
Technical scheme of the present invention is achieved in that
A multicast transmission method of distinguishing data priority, comprising:
The sending mode for different types of data in data sending terminal setting in advance, described sending mode comprises priority;
Data sending terminal obtains data, searches corresponding priority according to the type of data, and described data are sent to sequence according to priority data inserting, and is not transmission by the status indication of described data; According to priority order from high to low one by one deal with data send the data in sequence.
Distinguish a multicast transmission system for data priority, comprise data sending terminal and data receiver;
Described data sending terminal comprises:
The control module of making a start, for receiving the sending module for different types of data, and is sent to by sending mode the schema management module of making a start, and described sending mode comprises priority; Also, for obtaining data, search corresponding priority according to the type of data, described data are sent to sequence according to priority data inserting, and be not transmission by the status indication of described data; According to priority order from high to low one by one deal with data send the data in sequence;
The schema management module of making a start, for receiving and preserve the sending mode of different types of data;
Data send sequence memory module, send sequence for storing described data.
A data sending terminal of realizing the multicast transmission of distinguishing data priority, comprising:
The control module of making a start, for receiving the sending module for different types of data, and is sent to by sending mode the schema management module of making a start, and described sending mode comprises priority; Also, for obtaining data, search corresponding priority according to the type of data, described data are sent to sequence according to priority data inserting, and be not transmission by the status indication of described data; According to priority order from high to low one by one deal with data send the data in sequence;
The schema management module of making a start, for receiving and preserve the sending mode of different types of data;
Data send sequence memory module, send sequence for storing described data.
A data receiver of realizing the multicast transmission of distinguishing data priority, comprising:
Receiving end control module, for receiving the sending mode for different types of data, and is sent to receiving end schema management module by sending mode, and described sending mode comprises priority, dependability parameter and maximum delay, also for by the data from data sending terminal according to reception order data inserting receiving sequence, and processed one by one the data of stating in data receiver sequence by the order after arriving first according to reception order, the mode of processing is: judge whether these data have disappearance, if not disappearance, from receiving end schema management module, search the dependability parameter corresponding to type of these data, according to this dependability parameter instruction fec decoder module, these data are carried out to fec decoder, if there is disappearance, from receiving end schema management module, search the maximum delay corresponding to type of these data, whether can be overtime while judging this data re-transmission according to this maximum delay, if can be overtime, according to dependability parameter instruction fec decoder module corresponding to the type of these data, these data are carried out to fec decoder, if can be not overtime, generate the NAK request for these data, this NAK request is inserted to NAK request according to priority corresponding to this data type and send sequence,
Receiving end schema management module, for receiving and preserve the sending mode of different types of data;
Data reception module, for receiving the data from data sending terminal;
Data receiver sequence memory module, for storing described data receiver sequence;
Fec decoder module, for carrying out fec decoder according to the instruction of receiving end control module to data;
NAK sending module, sends sequence for preserving NAK request, and processes one by one the NAK request in NAK request transmission sequence.
Visible, multicast transmission method, system and the device of the differentiation data priority that the present invention proposes, be dissimilar data flexible configuration priority in advance, and pin, to sent data, sends sequence according to the priority of these data by this data data inserting; In the time sending, according to priority order from high to low one by one deal with data send the data in sequence, thereby provide the multicast transmission service of different priorities for dissimilar data.
Brief description of the drawings
Fig. 1 is the multicast transmission method realization flow figure of the differentiation data priority that proposes of the present invention;
Fig. 2 is the structural representation of data sending terminal in the embodiment of the present invention one;
Fig. 3 is the realization flow figure of the embodiment of the present invention two;
Fig. 4 is the realization flow figure of the embodiment of the present invention three;
Fig. 5 is the realization flow figure of the embodiment of the present invention four;
Fig. 6 is the structural representation of data receiver in the embodiment of the present invention five;
Fig. 7 is the realization flow figure of the embodiment of the present invention six;
Fig. 8 is the realization flow figure of the embodiment of the present invention seven;
Fig. 9 is the realization flow figure of the embodiment of the present invention eight.
Embodiment
The present invention proposes a kind of multicast transmission method of distinguishing data priority, as the realization flow figure that Fig. 1 is the method, comprising:
Step 101: the sending mode for different types of data in data sending terminal setting in advance, described sending mode comprises priority;
Step 102: data sending terminal obtains data, searches corresponding priority according to the type of data, and described data are sent to sequence according to priority data inserting, and is not transmission by the status indication of described data;
Step 103: according to priority order from high to low one by one deal with data send the data in sequence.
After inserting new data in data transmission sequence at every turn, data sending terminal all can start to process from the highest data of priority again, ensure that like this data that priority is high can preferentially be sent out away, thereby realized the multicast transmission service that different priorities is provided for dissimilar data.
Above-mentioned sending mode may further include dependability parameter, and dependability parameter has specified which kind of FEC coded system of data acquisition encodes.
Correspondingly, sending the mode of sequence according to priority orders data inserting and can be described in step 102: search corresponding dependability parameter according to the type of data, according to this dependability parameter, data are carried out to FEC coding, the data after coding are sent to sequence according to priority orders data inserting.
Above-mentioned sending mode can further include maximum delay;
Correspondingly, in above-mentioned steps 103, the mode of the data in deal with data transmission sequence can be:
Search corresponding maximum delay according to the type of data;
When the state of described data is not when sending, judge whether overtimely according to this maximum delay, if overtime, send sequence and delete this data from described data; If not overtime, send these data, and by the status indication of these data for sending;
When the state of described data is when sending, judge whether overtimely according to this maximum delay, if overtime, send sequence and delete this data from described data; If not overtime, do not do any processing.
Further, if data receiver is made mistakes to the reception of data, will ask for the NAK of these data to data sending terminal feedback;
For the NAK request of data receiver feedback, data sending terminal first can judge the predefined time period of the last period in whether received the NAK request for these data; If so, ignore this NAK request; (reason of this processing mode is: because data sending terminal may receive the NAK request of multiple data receivers for same data, for fear of repeating to send data, if receive in a short time more than one NAK request for same data, data sending terminal only carries out data re-transmitting for a NAK request)
Otherwise, be not send by the status indication of these data, and improve the priority of these data, adjust these data according to this priority and send the position in sequence in data, according to priority order from high to low one by one deal with data send the data in sequence.Herein, the concrete mode of raising data priority can be: original priority is improved to default number of levels, the priority after being improved; Like this, for the data that occur before transmission abnormality, improve priority and can ensure that these data are sent out successfully as early as possible afterwards.
In foregoing, be provided with the sending mode for different types of data at data sending terminal, wherein sending mode can comprise priority, dependability parameter and maximum delay; Thereby data sending terminal can send with different sending modes dissimilar data acquisition.
Correspondingly, also can set in advance the sending mode for different types of data at data receiver, described sending mode comprises priority, dependability parameter and maximum delay;
Data receiver receives from the data of data sending terminal, by these data according to reception order data inserting receiving sequence; According to reception order by the data in deal with data receiving sequence one by one of the order after arriving first; The mode of described processing is:
Judge whether these data have disappearance, if do not lacked, according to dependability parameter corresponding to the type of these data, these data are carried out to fec decoder;
If there is disappearance, whether can be overtime while judging this data re-transmission according to maximum delay corresponding to the type of these data, if can be overtime, according to dependability parameter corresponding to the type of these data, these data be carried out to fec decoder; If can be not overtime, generate the NAK request for these data, this NAK request is inserted to NAK request according to priority corresponding to this data type and send sequence, process one by one NAK request and send the NAK request in sequence.
Wherein, processing NAK asks the mode of the NAK request in transmission sequence to be:
After predefined a period of time, judge whether to receive this NAK request institute for the data retransmission of data, if received, delete this NAK and ask; If no, send this NAK request.Aforementioned predefined a period of time is called back off time, and the object of its setting is to reduce NAK data volume as far as possible, avoids the generation of NAK storm.
Further, data receiver can also be to data sending terminal feedback network state parameter, and data sending terminal can regulate data transmission rate according to network state parameter.For example, data sending terminal can be by current network condition parameter and the whether congested critical parameters of network (in this example using packet loss 10% as without congestion situation, 30% is congested for producing, 10%～30% for stability region is as the initial value of critical parameters) compare, if network condition well and do not produce congested, by transmission rate improve a grade, otherwise by transmission rate reduce a grade.
Data sending terminal can be connected by WIFI wireless router with data receiver, but is not limited to WIFI LAN environment.In system, device both can be used as data sending terminal, also can be used as data receiver.Bottom transmission method used in the present invention can be ip multicast technology, for completing the basic transfer function of data from data sending terminal to data receiver.Below lifting specific embodiment introduces in detail.
Embodiment mono-:
The present embodiment is introduced a kind of topology example of data sending terminal, as the structural representation that Fig. 2 is data sending terminal in the present embodiment, comprising:
The control module 201 of making a start, is used to caller that calling interface is provided; The main process of master control data sending terminal, and communication between responsible data sending terminal all parts; Management data sends sequence.
The schema management module 202 of making a start, is responsible for the sending mode of the different types of data of storage and maintenance user registration, and each sending mode can comprise priority, dependability parameter and maximum delay.Wherein, dependability parameter has specified the FEC coded system that data acquisition is used.The setting of these parts, is in order to complete one of innovative point of the present invention, and the transmission that is data provides sending mode configuration flexibly, realizes thus data staging by demand in priority, reliability and time delay.Meanwhile, two of innovative point of the present invention, when reliable data transmission is provided, also provides the control to time delay, is also the maximum delay data that rely upon this component stores.
Data send sequence memory module 203, send sequence for save data;
FEC coding module 204, is responsible for initial data to carry out FEC coding, generates the FEC redundant data for the protection of initial data, thereby generates the data after coding.
Data transmission blocks 205, is responsible for, by the data after coding and the data of re-transmission, sending to data receiver by the mode of multicast.
NAK receiver module 206, is responsible for receiving the NAK request of data receiver feedback.
Rate adaptation module 207, is responsible for receiving the network condition information of data receiver feedback, and regulates transmission rate according to this network condition information.
Particularly, the control module 201 of making a start, for receiving the sending module for different types of data, and is sent to by sending mode the schema management module 202 of making a start, and described sending mode comprises priority; Also, for obtaining data, search corresponding priority according to the type of data, described data are sent to sequence according to priority data inserting, and be not transmission by the status indication of described data; According to priority order from high to low one by one deal with data send the data in sequence;
The schema management module 202 of making a start, for receiving and preserve the sending mode of different types of data;
Data send sequence memory module 203, send sequence for storing described data.
Above-mentioned sending mode may further include dependability parameter; Described data sending terminal also comprises: FEC coding module 204, for data being carried out to FEC coding according to the instruction of the control module of making a start;
Described make a start control module 201 also for, send the data in sequence for data, from the schema management module 202 of making a start, search the dependability parameter corresponding to type of these data, according to this dependability parameter instruction FEC coding module 204, these data are carried out to FEC coding, and the data after coding are sent to sequence according to priority orders data inserting.
Above-mentioned sending mode may further include maximum delay;
The mode that described control module 201 deal with data of making a start send the data in sequence can be:
From the schema management module 202 of making a start, search the maximum delay corresponding to type of these data;
When the state of described data is not when sending, judge whether overtimely according to this maximum delay, if overtime, send sequence and delete this data from described data; If not overtime, director data sending module 205 sends these data, and by the status indication of these data for sending; When the state of described data is when sending, judge whether overtimely according to this maximum delay, if overtime, send sequence and delete this data from described data;
Described data sending terminal also comprises data transmission blocks 205, sends data for the instruction according to the control module 201 of making a start.
Data sending terminal can also comprise NAK receiver module 206, for receiving the request of the NAK for data of data receiver feedback;
Described make a start control module 201 also for, judge the predefined time period of the last period in whether received the NAK request for these data, if so, ignore this NAK request; Otherwise, be not send by the status indication of these data, and improve the priority of these data, adjust these data and send in data the position of sequence according to this priority, according to priority order from high to low one by one deal with data send the data in sequence.
Data sending terminal can further include: rate adaptation module 207, for receiving network state parameter, and regulates data transmission rate according to this network state parameter.
Embodiment bis-:
The present embodiment is introduced the basic procedure example of data sending terminal transmission data, as the realization flow figure that Fig. 3 is the present embodiment, comprising:
Step 301: application program is registered the sending mode for different types of data to the control module of making a start of data sending terminal, and every kind of sending mode is described by priority, dependability parameter and maximum delay.
Step 302: the control module of making a start passes to by sending mode the schema management module of making a start and stores.
Step 303: application program is taken out a blocks of data from data area to be sent, the control module of asking to make a start adopts the required transmission mould of these data to send.
Step 304: the control module of making a start reads sending mode information corresponding to these data by the schema management module of making a start, and dependability parameter based in sending mode, control FEC coding module and encode.
Step 305: the control module of making a start sends sequence by the data (comprising initial data and FEC redundant data) after coding according to priority orders data inserting, and be not transmission by this data markers.
Step 306: the control module of making a start sends the data in sequence according to priority sequence processing data from high to low, and processing mode is:
Transmission rate information in reading rate adjustment module;
For being labeled as the data that do not send in data transmission sequence, read maximum delay corresponding to these data by the schema management module of making a start, judge whether overtime according to this maximum delay, if it is not overtime, control data transmission blocks and adopt above-mentioned transmission rate to send this data, and by this data markers for sending; If overtime, delete these data;
Send in sequence and be labeled as the data that sent for data, read maximum delay corresponding to these data by the schema management module of making a start, judge whether overtimely according to this maximum delay, delete these data.
Embodiment tri-:
The present embodiment is introduced the processing mode example of data sending terminal for NAK request, as the realization flow figure that Fig. 4 is the present embodiment, comprising:
Step 401: the NAK receiver module of data sending terminal receives NAK request, as found to exceed once for the NAK request receiving of same data, and the time that differs is too short, ignores this NAK request; Otherwise, the make a start repeating transmission of control module executing data of request.
Step 402: the control module of making a start reads precedence information corresponding to these data from the schema management module of making a start, and the data for the treatment of accordingly repeating transmission arrange priority and are: original priority+lifting values; Arrange and adjust the position of data in data transmission sequence according to this priority.
Step 403: the control module of making a start sends the data in sequence according to priority order from high to low successively deal with data.
Embodiment tetra-:
The present embodiment is introduced data sending terminal according to the example of network state parameter adjustment transmission rate, as the realization flow figure that Fig. 5 is the present embodiment, comprising:
Step 501: the rate adaptation module of data sending terminal receives the network state parameter from data receiver.
Step 502: rate adaptation module compares this network state parameter and the whether congested critical parameters of network, if network condition well, improves a grade by transmission rate, otherwise reduces a grade.
Step 503: the control module of making a start control data transmission blocks adopts the rate sending data after upgrading.
More than adopt 4 embodiment to introduce the structure of data sending terminal, function and data transmission flow, below introduce structure, function and the data receiver flow process of data receiver.
Embodiment five:
The present embodiment is introduced a kind of topology example of data receiver, as the structural representation that Fig. 2 is data receiver in the present embodiment, comprising:
Receiving end control module 601: be used to caller that calling interface is provided; The main process of master control data receiver, and communication between responsible data receiver all parts; Management data receiving sequence;
Receiving end schema management module 602, the sending mode of the different types of data of responsible storage and maintenance user registration, each sending mode can comprise priority, dependability parameter and maximum delay.Wherein, dependability parameter has specified the FEC coded system that data acquisition is used.
Data reception module 603: be responsible for receiving from the data of data sending terminal and the data of re-transmission;
Data receiver sequence memory module 604, the data that responsible buffer memory receives, and provide according to the function of the reception order insetion sequence of data;
Fec decoder module 605, is responsible for the data that receive (comprising initial data and redundant data) to carry out fec decoder computing, so that in the time that initial data occurs to lose, decodes the initial data of loss by redundant data;
NAK sending module 606, is responsible for losing in initial data, and redundant data is while being also not enough to recover initial data, sends the NAK message of data to data sending terminal;
Network monitoring module 607, be responsible for monitoring network situation, and by network condition information Real-time Feedback to transmitting terminal.
Particularly, receiving end control module 601, for receiving the sending mode for different types of data, and is sent to receiving end schema management module 602 by sending mode, and described sending mode comprises priority, dependability parameter and maximum delay, also for by the data from data sending terminal according to reception order data inserting receiving sequence, and processed one by one the data of stating in data receiver sequence by the order after arriving first according to reception order, the mode of processing is: judge whether these data have disappearance, if not disappearance, from receiving end schema management module 602, search the dependability parameter corresponding to type of these data, according to this dependability parameter instruction fec decoder module 605, these data are carried out to fec decoder, if there is disappearance, from receiving end schema management module 602, search the maximum delay corresponding to type of these data, whether can be overtime while judging this data re-transmission according to this maximum delay, if can be overtime, according to dependability parameter instruction fec decoder module 605 corresponding to the type of these data, these data are carried out to fec decoder, if can be not overtime, generate the NAK request for these data, this NAK request is inserted to NAK request according to priority corresponding to this data type and send sequence,
Receiving end schema management module 602, for receiving and preserve the sending mode of different types of data;
Data reception module 603, for receiving the data from data sending terminal;
Data receiver sequence memory module 604, for storing described data receiver sequence;
Fec decoder module 605, for carrying out fec decoder according to the instruction of receiving end control module 601 to data;
NAK sending module 606, sends sequence for preserving NAK request, and processes one by one the NAK request in NAK request transmission sequence.
The mode that above-mentioned NAK sending module 606 is processed the NAK request in NAK request transmission sequence can be:
After predefined a period of time, judge data reception module 603 whether receive this NAK request institute for the data retransmission of data, if received, delete this NAK and ask; If no, send this NAK request.
Network monitoring module 607, for monitoring network state parameter, and feeds back this network state parameter to data sending terminal.
Embodiment six:
The present embodiment is introduced the basic procedure example of data receiver reception data, as the realization flow figure that Fig. 7 is the present embodiment, comprising:
Step 701: application program is registered the sending mode for different types of data to the receiving end control module of data receiver, and every kind of sending mode is described by priority, dependability parameter and maximum delay.
Step 702: receiving end control module passes to receiving end schema management module by sending mode and stores.
Step 703: data reception module receives new data, is submitted to receiving end control module, and receiving end control module is inserted into data receiver sequence according to the reception order of data.
Step 704: receiving end control module will receive the information notice network monitoring module of data, the network state parameter of upgrading monitoring of network monitoring module certificate.
Step 705: from first to last data in deal with data receiving sequence successively of receiving end control module, processing mode is:
For the data (comprising initial data and redundant data) of enough decodings, from receiving end schema management module, search dependability parameter corresponding to these data, instruction fec decoder module adopts corresponding fec decoder mode to decode;
The data of enough not decoding for initial data+redundant data, from receiving end schema management module, search maximum delay corresponding to these data, whether judge can be overtime while re-transmission, if can be overtime, from receiving end schema management module, search dependability parameter corresponding to these data, instruction fec decoder module adopts corresponding fec decoder mode to decode; If can be not overtime, indicate NAK sending module to send the NAK request for these data.
Step 706: data reception module receives the data retransmission of these data, is submitted to receiving end control module, and receiving end control module is inserted into data receiver sequence according to the reception order of data.
Embodiment seven:
The present embodiment is introduced data receiver and is sent the processing mode example that NAK asks, and as the realization flow figure that Fig. 8 is the present embodiment, comprising:
Step 801: receiving end control module instruction NAK sending module sends the NAK request for data.
Step 802:NAK sending module inserts NAK request by this NAK request according to priority corresponding to this data type and sends sequence, and processes one by one the NAK request in sequence, and the mode of processing is:
Predefined a period of time (being back off time) afterwards, judge data reception module whether receive this NAK request institute for the data retransmission of data, if received, delete this NAK and ask; If no, send this NAK request.
Embodiment eight:
The present embodiment is introduced the mode example of data receiver feedback network state parameter, as the realization flow figure that Fig. 9 is the present embodiment, comprising:
Step 901: data reception module receives new data, by the sequence number informing network monitoring modular of the data that receive.
Step 902: network monitoring module is taking several data as a base unit, statistics network state parameter.
Step 903: network monitoring module by network state parameter feedback to data sending terminal.
More than introduce the specific embodiment of multicast transmission method, data sending terminal and the data receiver of the differentiation data priority of the present invention's proposition, the present invention also proposes a kind of multicast transmission system of distinguishing data priority, this system comprises data sending terminal and data receiver, the concrete structure of data sending terminal and data receiver and function are existing in the preceding article to be introduced in detail, not superfluous at this.
As fully visible, the present invention provides different transmission priorities for dissimilar data, reliability, and maximum delay is selected.When dissimilar data are transmitted simultaneously, important data can preferentially be transmitted, and dissimilar data can obtain different reliability guarantees and different propagation delay times.For transfer of data provides the control of maximum delay, to avoid the stream medium data that requirement of real-time is high to transmit in real time.Adopt the transmitting strategy of FEC redundancy forward and the combination of feedback retransmission mechanism.To when network environment is good, save spent transmission bandwidth as far as possible, avoid network congestion.And when network environment is poor, adopt higher dependability parameter, solve the too high problem of effective packet loss.And, for providing, the transmission of NAK request keeps out of the way processing, to reduce the data volume of NAK request as far as possible, avoid the generation of NAK storm.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any amendment of making, be equal to replacement, improvement etc., within all should being included in the scope of protection of the invention.
Claims (22)
1. a multicast transmission method of distinguishing data priority, is characterized in that, described method comprises:
The sending mode for different types of data in data sending terminal setting in advance, described sending mode comprises priority;
Data sending terminal obtains data, searches corresponding priority according to the type of data, and described data are sent to sequence according to priority data inserting, and is not transmission by the status indication of described data; According to priority order from high to low one by one deal with data send the data in sequence.
2. method according to claim 1, is characterized in that, described sending mode further comprises dependability parameter;
The described mode that described data are sent to sequence according to priority orders data inserting is: search corresponding dependability parameter according to the type of data, according to this dependability parameter, data are carried out to FEC coding, the data after coding are sent to sequence according to priority orders data inserting.
3. method according to claim 1 and 2, is characterized in that, described sending mode further comprises maximum delay;
The mode that described deal with data sends the data in sequence is:
Search corresponding maximum delay according to the type of data;
When the state of described data is not when sending, judge whether overtimely according to this maximum delay, if overtime, send sequence and delete this data from described data; If not overtime, send these data, and by the status indication of these data for sending;
When the state of described data is when sending, judge whether overtimely according to this maximum delay, if overtime, send sequence and delete this data from described data.
4. method according to claim 3, is characterized in that, after these data of described transmission, further comprises:
Receive the request of the NAK for these data of data receiver feedback, judge the predefined time period of the last period in whether received the NAK request for these data, if so, ignore this NAK and ask; Otherwise, be not send by the status indication of these data, and improve the priority of these data, adjust these data according to this priority and send the position in sequence in data, according to priority order from high to low one by one deal with data send the data in sequence.
5. method according to claim 3, is characterized in that, described method further comprises:
The sending mode for different types of data in data receiver setting in advance, described sending mode comprises priority, dependability parameter and maximum delay;
Data receiver receives from the data of data sending terminal, by these data according to reception order data inserting receiving sequence; According to reception order by the data in deal with data receiving sequence one by one of the order after arriving first; The mode of described processing is:
Judge whether these data have disappearance, if do not lacked, according to dependability parameter corresponding to the type of these data, these data are carried out to fec decoder;
If there is disappearance, whether can be overtime while judging this data re-transmission according to maximum delay corresponding to the type of these data, if can be overtime, according to dependability parameter corresponding to the type of these data, these data be carried out to fec decoder; If can be not overtime, generate the NAK request for these data, this NAK request is inserted to NAK request according to priority corresponding to this data type and send sequence, process one by one NAK request and send the NAK request in sequence.
6. method according to claim 5, is characterized in that, the mode that described processing NAK request sends the NAK request in sequence is:
After predefined a period of time, judge whether to receive this NAK request institute for the data retransmission of data, if received, delete this NAK and ask; If no, send this NAK request.
7. method according to claim 1 and 2, is characterized in that, described method further comprises:
Data receiver is to data sending terminal feedback network state parameter, and described data sending terminal regulates data transmission rate according to network state parameter.
8. a multicast transmission system of distinguishing data priority, is characterized in that, described system comprises data sending terminal and data receiver;
Described data sending terminal comprises:
The control module of making a start, for receiving the sending module for different types of data, and is sent to by sending mode the schema management module of making a start, and described sending mode comprises priority; Also, for obtaining data, search corresponding priority according to the type of data, described data are sent to sequence according to priority data inserting, and be not transmission by the status indication of described data; According to priority order from high to low one by one deal with data send the data in sequence;
The schema management module of making a start, for receiving and preserve the sending mode of different types of data;
Data send sequence memory module, send sequence for storing described data.
9. system according to claim 8, is characterized in that, described sending mode further comprises dependability parameter;
Described data sending terminal also comprises: FEC coding module, for data being carried out to FEC coding according to the instruction of the control module of making a start;
Described make a start control module also for, send the data in sequence for data, from the schema management module of making a start, search the dependability parameter corresponding to type of these data, according to this dependability parameter instruction FEC coding module, these data are carried out to FEC coding, and the data after coding are sent to sequence according to priority orders data inserting.
10. system according to claim 8 or claim 9, is characterized in that, described sending mode further comprises maximum delay;
The mode that the described control module deal with data of making a start sends the data in sequence is:
From the schema management module of making a start, search the maximum delay corresponding to type of these data;
When the state of described data is not when sending, judge whether overtimely according to this maximum delay, if overtime, send sequence and delete this data from described data; If not overtime, director data sending module sends this data, and by the status indication of these data for sending; When the state of described data is when sending, judge whether overtimely according to this maximum delay, if overtime, send sequence and delete this data from described data;
Described data sending terminal also comprises data transmission blocks, sends data for the instruction according to the control module of making a start.
11. systems according to claim 10, is characterized in that, described data sending terminal also comprises NAK receiver module, for receiving the request of the NAK for data of data receiver feedback;
Described make a start control module also for, judge the predefined time period of the last period in whether received the NAK request for these data, if so, ignore this NAK request; Otherwise, be not send by the status indication of these data, and improve the priority of these data, adjust these data and send in data the position of sequence according to this priority, according to priority order from high to low one by one deal with data send the data in sequence.
12. systems according to claim 10, is characterized in that, described data receiver comprises:
Receiving end control module, for receiving the sending mode for different types of data, and is sent to receiving end schema management module by sending mode, and described sending mode comprises priority, dependability parameter and maximum delay, also for by the data from data sending terminal according to reception order data inserting receiving sequence, and processed one by one the data of stating in data receiver sequence by the order after arriving first according to reception order, the mode of processing is: judge whether these data have disappearance, if not disappearance, from receiving end schema management module, search the dependability parameter corresponding to type of these data, according to this dependability parameter instruction fec decoder module, these data are carried out to fec decoder, if there is disappearance, from receiving end schema management module, search the maximum delay corresponding to type of these data, whether can be overtime while judging this data re-transmission according to this maximum delay, if can be overtime, according to dependability parameter instruction fec decoder module corresponding to the type of these data, these data are carried out to fec decoder, if can be not overtime, generate the NAK request for these data, this NAK request is inserted to NAK request according to priority corresponding to this data type and send sequence,
Receiving end schema management module, for receiving and preserve the sending mode of different types of data;
Data reception module, for receiving the data from data sending terminal;
Data receiver sequence memory module, for storing described data receiver sequence;
Fec decoder module, for carrying out fec decoder according to the instruction of receiving end control module to data;
NAK sending module, sends sequence for preserving NAK request, and processes one by one the NAK request in NAK request transmission sequence.
13. systems according to claim 12, is characterized in that, the mode that described NAK sending module is processed the NAK request in NAK request transmission sequence is:
After predefined a period of time, judge data reception module whether receive this NAK request institute for the data retransmission of data, if received, delete this NAK and ask; If no, send this NAK request.
14. systems according to claim 8 or claim 9, is characterized in that, data receiver further comprises: network monitoring module, for monitoring network state parameter, and feed back this network state parameter to data sending terminal;
Described data sending terminal further comprises: rate adaptation module, for receiving network state parameter, and regulates data transmission rate according to this network state parameter.
Realize the data sending terminal of the multicast transmission of distinguishing data priority for 15. 1 kinds, it is characterized in that, described data sending terminal comprises:
The control module of making a start, for receiving the sending module for different types of data, and is sent to by sending mode the schema management module of making a start, and described sending mode comprises priority; Also, for obtaining data, search corresponding priority according to the type of data, described data are sent to sequence according to priority data inserting, and be not transmission by the status indication of described data; According to priority order from high to low one by one deal with data send the data in sequence;
The schema management module of making a start, for receiving and preserve the sending mode of different types of data;
Data send sequence memory module, send sequence for storing described data.
16. data sending terminals according to claim 15, is characterized in that, described sending mode further comprises dependability parameter; Described data sending terminal also comprises: FEC coding module, for data being carried out to FEC coding according to the instruction of the control module of making a start;
Described make a start control module also for, send the data in sequence for data, from the schema management module of making a start, search the dependability parameter corresponding to type of these data, according to this dependability parameter instruction FEC coding module, these data are carried out to FEC coding, and the data after coding are sent to sequence according to priority orders data inserting.
17. according to the data sending terminal described in claim 15 or 16, it is characterized in that, described sending mode further comprises maximum delay;
The mode that the described control module deal with data of making a start sends the data in sequence is:
From the schema management module of making a start, search the maximum delay corresponding to type of these data;
When the state of described data is not when sending, judge whether overtimely according to this maximum delay, if overtime, send sequence and delete this data from described data; If not overtime, director data sending module sends this data, and by the status indication of these data for sending; When the state of described data is when sending, judge whether overtimely according to this maximum delay, if overtime, send sequence and delete this data from described data;
Described data sending terminal also comprises data transmission blocks, sends data for the instruction according to the control module of making a start.
18. data sending terminals according to claim 17, is characterized in that, described data sending terminal also comprises NAK receiver module, for receiving the request of the NAK for data of data receiver feedback;
Described make a start control module also for, judge the predefined time period of the last period in whether received the NAK request for these data, if so, ignore this NAK request; Otherwise, be not send by the status indication of these data, and improve the priority of these data, adjust these data and send in data the position of sequence according to this priority, according to priority order from high to low one by one deal with data send the data in sequence.
19. according to the data sending terminal described in claim 15 or 16, it is characterized in that, described data sending terminal further comprises: rate adaptation module, for receiving network state parameter, and regulates data transmission rate according to this network state parameter.
Realize the data receiver of the multicast transmission of distinguishing data priority for 20. 1 kinds, it is characterized in that, described data receiver comprises:
Receiving end control module, for receiving the sending mode for different types of data, and is sent to receiving end schema management module by sending mode, and described sending mode comprises priority, dependability parameter and maximum delay, also for by the data from data sending terminal according to reception order data inserting receiving sequence, and processed one by one the data of stating in data receiver sequence by the order after arriving first according to reception order, the mode of processing is: judge whether these data have disappearance, if not disappearance, from receiving end schema management module, search the dependability parameter corresponding to type of these data, according to this dependability parameter instruction fec decoder module, these data are carried out to fec decoder, if there is disappearance, from receiving end schema management module, search the maximum delay corresponding to type of these data, whether can be overtime while judging this data re-transmission according to this maximum delay, if can be overtime, according to dependability parameter instruction fec decoder module corresponding to the type of these data, these data are carried out to fec decoder, if can be not overtime, generate the NAK request for these data, this NAK request is inserted to NAK request according to priority corresponding to this data type and send sequence,
Receiving end schema management module, for receiving and preserve the sending mode of different types of data;
Data reception module, for receiving the data from data sending terminal;
Data receiver sequence memory module, for storing described data receiver sequence;
Fec decoder module, for carrying out fec decoder according to the instruction of receiving end control module to data;
NAK sending module, sends sequence for preserving NAK request, and processes one by one the NAK request in NAK request transmission sequence.
21. data receivers according to claim 20, is characterized in that, the mode that described NAK sending module is processed the NAK request in NAK request transmission sequence is:
After predefined a period of time, judge data reception module whether receive this NAK request institute for the data retransmission of data, if received, delete this NAK and ask; If no, send this NAK request.
22. according to the data receiver described in claim 20 or 21, it is characterized in that, data receiver further comprises: network monitoring module, for monitoring network state parameter, and feed back this network state parameter to data sending terminal.
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