CN105357577A - Packet loss retransmission method and device - Google Patents
Packet loss retransmission method and device Download PDFInfo
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- CN105357577A CN105357577A CN201410419488.1A CN201410419488A CN105357577A CN 105357577 A CN105357577 A CN 105357577A CN 201410419488 A CN201410419488 A CN 201410419488A CN 105357577 A CN105357577 A CN 105357577A
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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]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
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- Computer Networks & Wireless Communication (AREA)
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- Data Exchanges In Wide-Area Networks (AREA)
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Abstract
The invention discloses a packet loss retransmission method and device for a live broadcast of a network television. The packet loss retransmission method disclosed by the invention comprises the following steps: receiving first retransmission request information sent by a terminal after detecting packet loss; responding to the first retransmission request information, creating a retransmission channel with the terminal, and feeding back first alive keeping time information of the retransmission channel; and sending a retransmission packet to the terminal according to the packet loss information sent by the terminal within a first alive keeping time set by the first alive keeping time information. According to the packet loss retransmission method and device disclosed by the invention, the concept of the alive keeping time is introduced, the retransmission channel is established only when the terminal detects the packet loss, and after exceeding the alive keeping time, the resource of a server will be released, in this way, the resource consumption of the server is greatly reduced, and the performance of the server is greatly improved.
Description
Technical field
The present invention relates to network TV IPTV field of information transmission, particularly relate to a kind of packet loss repeating method for IPTV and device.
Background technology
IPTV is one of topmost business of Web TV, the card caused due to packet loss pauses or the anomaly such as Hua Ping is the technical bottleneck of current video communication, the method that this type of packet loss problem mainly adopts multicast and unicast retransmission to combine is solved in prior art, when packet loss being detected, just request server retransmission of lost bag, reply packet loss data, but in general, packet loss phenomenon mainly occur in network quality very poor when, and server is necessary for the terminal reservation of resource that each new access is come in prior art, and the re-transmission passage continuously effective between Deterministic service device and terminal, if certain terminal does not exit always, so the resource of server will be occupied by this terminal always, therefore the performance of server is produced a very large impact.
Summary of the invention
In order to solve the problems of the technologies described above, the invention discloses a kind of packet loss repeating method and device, reduce because server resource is caused impact on server performance by occupying always.
According to one aspect of the present invention, provide a kind of packet loss repeating method, be applied to IPTV, comprise:
The first HARQ information that receiving terminal sends after packet loss being detected;
Respond the first HARQ information, create the re-transmission passage between terminal, and the first keep-alive temporal information of repeat request passage;
Within the first keep-alive time set by the first keep-alive temporal information, according to the packet loss information that terminal sends, send retransmission packet to terminal.
Also comprise after the step of the first keep-alive temporal information of repeat request passage: monitoring retransmits effective open hour of passage, when effective open hour were greater than for the first keep-alive time, close and retransmit passage.
Also comprise after closing the step retransmitting passage: the second HARQ information sent after receiving terminal detects packet loss; Respond the second HARQ information, re-create re-transmission passage, and feed back the second keep-alive temporal information of the re-transmission passage re-created.
Wherein, within the first keep-alive time set by the first keep-alive temporal information, according to the packet loss information that terminal sends, the step sending retransmission packet to terminal comprises:
The packet loss information that receiving terminal sends;
Judging whether the effective open hour retransmitting passage arrived for the first keep-alive time, when not arriving for the first keep-alive time, then sending retransmission packet to terminal; When the arrival first keep-alive time, then do not send retransmission packet to terminal.
According to another aspect of the present invention, additionally provide a kind of packet loss retransmission arrangement, be applied to IPTV, comprise:
Receiver module, the first HARQ information sent after packet loss being detected for receiving terminal;
Module is set up in re-transmission, for responding the first HARQ information, creates the re-transmission passage between terminal, and the first keep-alive temporal information of repeat request passage;
Retransmission module, within the first keep-alive time set by the first keep-alive temporal information, according to the packet loss information that terminal sends, sends retransmission packet information to terminal.
This packet loss retransmission arrangement, also comprises: detection module, for monitoring the effective open hour retransmitting passage; Retransmit closing module, for when effective open hour were greater than for the first keep-alive time, close and retransmit passage.
Wherein, receiver module also retransmits after passage for closing in re-transmission closing module, the second HARQ information that receiving terminal sends after packet loss being detected;
Re-transmission sets up module also for responding the second HARQ information, re-creates re-transmission passage, and feeds back the second keep-alive temporal information of the re-transmission passage re-created.
Wherein, retransmission module specifically comprises: packet loss information receiving unit, for the packet loss information that receiving terminal sends; Judging unit, for judging whether the effective open hour retransmitting passage arrived for the first keep-alive time; Transmitting element, during for judging that effective open hour did not arrive for the first keep-alive time when judging unit, sends retransmission packet to terminal; When judging unit judges that effective open hour arrived for the first keep-alive time, do not send retransmission packet to terminal.
Wherein, retransmit the re-transmission passage setting up module creation and adopt transmission control protocol TCP or datagram protocol.
Wherein, terminal is Set Top Box STB.
The beneficial effect of embodiments of the invention is: a kind of packet loss repeating method and device; in the communication link of legacy network live telecast; by introducing keep-alive concept of time; only just can set up re-transmission passage when terminal detects packet loss; and after exceeding the keep-alive time; the resource of server will be released; the resource of such server only just can be occupied after packet loss being detected; and can not be taken by terminal as before always; greatly reduce the consumption of server resource, greatly improve the performance of server.
Accompanying drawing explanation
Fig. 1 represents the method flow diagram of the embodiment of the present invention;
Fig. 2 represents the network topological diagram of the embodiment of the present invention;
Fig. 3 represents the packet loss repeating method topological diagram of the embodiment of the present invention;
Fig. 4 represents the structured flowchart of the embodiment of the present invention.
Embodiment
Below with reference to accompanying drawings exemplary embodiment of the present disclosure is described in more detail.Although show exemplary embodiment of the present disclosure in accompanying drawing, however should be appreciated that can realize the disclosure in a variety of manners and not should limit by the embodiment set forth here.On the contrary, provide these embodiments to be in order to more thoroughly the disclosure can be understood, and complete for the scope of the present disclosure can be conveyed to those skilled in the art.
Embodiment
Embodiments of the invention disclose a kind of packet loss repeating method, are applied to IPTV, as shown in Figure 2, set up a multicast group; Multicast channel, server and terminal are added this multicast group, and creates the network link of this multicast channel respectively and between server and terminal; Multicast channel is for generation of multicast data flow; The multicast data flow that server receiving group channel sends, and with the nearest multicast code stream of the form buffer memory one section of packet; Terminal receives the multicast data flow that this multicast channel sends.
As shown in Figure 1 to Figure 3, embodiments of the invention disclose a kind of packet loss repeating method, comprising:
Step 10: the first HARQ information that receiving terminal sends after packet loss being detected;
In an embodiment of the present invention, when terminal detects that the multicast data flow transmitted has a packet loss, request and server connect, and send the first HARQ information.
Step 20: respond the first HARQ information, creates the re-transmission passage between terminal, and the first keep-alive temporal information of repeat request passage;
In an embodiment of the present invention, after receiving the first HARQ information, server application resource, and create with terminal and retransmit passage, and the keep-alive temporal information of repeat request passage, this keep-alive temporal information is calculated by the first HARQ information, defines the keep-alive time retransmitting passage, it should be noted that the restriction of keep-alive time also has certain relation with current network condition; And the re-transmission passage of server and terminal both sides is only effective within the keep-alive time.
Step 30: within the first keep-alive time set by the first keep-alive temporal information, according to the packet loss information that terminal sends, sends retransmission packet to terminal;
Terminal initiates packet loss information to server, and server sends retransmission packet.
Wherein, within the first keep-alive time set by the first keep-alive temporal information; the packet loss information that server sends according to terminal; the concrete operation step sending retransmission packet to terminal comprises: the packet loss information that receiving terminal sends; and judge whether the effective open hour retransmitting passage arrived for the first keep-alive time; only just can send retransmission packet to terminal when not arriving for the first keep-alive time, once exceed for the first keep-alive time, then not sending retransmission packet to terminal.
If after terminal again detects packet loss within the first keep-alive time, directly send packet loss information, server, directly according to the packet loss information received, sends retransmission packet; Terminal detects packet loss again after exceeding the keep-alive time time, send the second HARQ information, server applies for resource again, and re-creates re-transmission passage with terminal, and the second keep-alive temporal information of repeat request passage.
If monitoring server has exceeded the keep-alive time, then server releasing resource to the effective open hour retransmitting passage, and close the re-transmission passage between terminal.
As shown in Figure 3, adopt method described in the specific embodiment of the invention, after terminal detects packet loss, and the reciprocal process between server specifically comprises the following steps:
Terminal detects packet loss, and sends the first HARQ information to server;
Server responds the first retransmission information, creates and retransmits passage, and retransmits the keep-alive temporal information of passage to terminal feedback;
Terminal sends packet loss information to server within the keep-alive time;
Server sends retransmission packet by retransmitting passage to terminal;
If terminal again detects packet loss within the keep-alive time, then send packet loss information directly to server, server sends retransmission packet to terminal; If after the keep-alive time lost efficacy; namely when re-transmission passage is closed; terminal detects packet loss again; then send the second HARQ information to server, server then re-creates re-transmission passage, and the keep-alive temporal information of repeat request passage again; repeat the step that above packet loss retransmits; to realize only taking server resource under packet drop, greatly reduce the occupancy of server resource, improve the performance of server.
The embodiment of the present invention; in the communication link of legacy network live telecast; by introducing keep-alive concept of time; only just can set up re-transmission passage when terminal detects packet loss, and after exceeding the keep-alive time, the resource of server will be released; the resource of such server only just can be occupied after packet loss being detected; and can not be taken by terminal as before, greatly reduce the consumption of server resource, greatly improve the performance of server. always
Embodiments of the invention also disclose a kind of packet loss retransmission arrangement, are applied to IPTV, as shown in Figure 4, comprising:
Receiver module, the first HARQ information sent after packet loss being detected for receiving terminal;
Module is set up in re-transmission, for responding the first HARQ information, creates the re-transmission passage between terminal, and the first keep-alive temporal information of repeat request passage;
Retransmission module, within the first keep-alive time set by the first keep-alive temporal information, according to the packet loss information that terminal sends, sends retransmission packet information to terminal.
This packet loss retransmission arrangement, also comprises: detection module, for monitoring the effective open hour retransmitting passage; Retransmit closing module, for when effective open hour were greater than for the first keep-alive time, close and retransmit passage.
Wherein, receiver module also retransmits after passage for closing in re-transmission closing module, the second HARQ information that receiving terminal sends after packet loss being detected;
Re-transmission sets up module also for responding the second HARQ information, re-creates re-transmission passage, and feeds back the second keep-alive temporal information of the re-transmission passage re-created.
Wherein, retransmission module specifically comprises: packet loss information receiving unit, for the packet loss information that receiving terminal sends; Judging unit, for judging whether the effective open hour retransmitting passage arrived for the first keep-alive time; Transmitting element, during for judging that effective open hour did not arrive for the first keep-alive time when judging unit, sends retransmission packet to terminal; When judging unit judges that effective open hour arrived for the first keep-alive time, do not send retransmission packet to terminal.
Wherein, retransmit the re-transmission passage setting up module creation and be applicable to transmission control protocol TCP or datagram protocol.
Those skilled in the art should be understood that, under this kind of transmission means, the selection of server and terminal, is no longer described in detail at this.The present embodiment only illustrates in the following manner.
Wherein, server can be streaming media server or other suitable servers, as long as namely can provide the server of live TV stream to terminal with mode of unicast.
Wherein, terminal is Set Top Box STB or comprises other suitable equipments or the combination with other equipment.
It should be noted that, this device is the device corresponding with above-mentioned packet loss repeating method embodiment, and in said method embodiment, all implementations are all applicable in the embodiment of this device, also can reach identical technique effect.
Above-described is the preferred embodiment of the present invention; should be understood that the ordinary person for the art; can also make some improvements and modifications not departing under principle prerequisite of the present invention, these improvements and modifications are also in protection scope of the present invention.
Claims (10)
1. a packet loss repeating method, is applied to IPTV, it is characterized in that, comprising:
The first HARQ information that receiving terminal sends after packet loss being detected;
Respond described first HARQ information, create the re-transmission passage between described terminal, and feed back the first keep-alive temporal information of described re-transmission passage;
Within the first keep-alive time set by described first keep-alive temporal information, according to the packet loss information that described terminal sends, send retransmission packet to described terminal.
2. packet loss repeating method according to claim 1, is characterized in that, also comprises after the step of the first keep-alive temporal information of the described re-transmission passage of described feedback:
Monitor effective open hour of described re-transmission passage, when described effective open hour are greater than the described first keep-alive time, close described re-transmission passage.
3. packet loss repeating method according to claim 2, is characterized in that, also comprises after the step of the described re-transmission passage of described closedown:
Receive the second HARQ information sent after described terminal detects packet loss;
Respond described second HARQ information, re-create described re-transmission passage, and feed back the second keep-alive temporal information of the described re-transmission passage re-created.
4. packet loss repeating method according to claim 1, is characterized in that, described within the first keep-alive time set by described first keep-alive temporal information, and according to the packet loss information that described terminal sends, the step sending retransmission packet to described terminal comprises:
Receive the described packet loss information that described terminal sends;
Judging whether effective open hour of described re-transmission passage arrive the described first keep-alive time, when not arriving the described first keep-alive time, then sending retransmission packet to described terminal; When arriving the described first keep-alive time, then do not send retransmission packet to described terminal.
5. a packet loss retransmission arrangement, is applied to IPTV, it is characterized in that, comprising:
Receiver module, the first HARQ information sent after packet loss being detected for receiving terminal;
Module is set up in re-transmission, for responding described first HARQ information, creating the re-transmission passage between described terminal, and feeding back the first keep-alive temporal information of described re-transmission passage;
Retransmission module, within the first keep-alive time set by described first keep-alive temporal information, according to the packet loss information that described terminal sends, sends retransmission packet information to described terminal.
6. packet loss retransmission arrangement according to claim 5, is characterized in that, described packet loss retransmission arrangement also comprises:
Detection module, for monitoring effective open hour of described re-transmission passage;
Retransmit closing module, for when described effective open hour are greater than the described first keep-alive time, close described re-transmission passage.
7. packet loss retransmission arrangement according to claim 6, is characterized in that, described receiver module also for after closing described re-transmission passage in described re-transmission closing module, receives the second HARQ information sent after described terminal detects packet loss;
Described re-transmission sets up module also for responding described second HARQ information, re-creates described re-transmission passage, and feeds back the second keep-alive temporal information of the described re-transmission passage re-created.
8. packet loss retransmission arrangement according to claim 5, is characterized in that, described retransmission module specifically comprises:
Packet loss information receiving unit, for receiving the described packet loss information that described terminal sends;
Judging unit, for judging whether effective open hour of described re-transmission passage arrive the described first keep-alive time;
Transmitting element, during for judging that described effective open hour do not arrive the described first keep-alive time when described judging unit, sends retransmission packet to described terminal; When described judging unit judges that described effective open hour arrive the described first keep-alive time, do not send retransmission packet to described terminal.
9. packet loss retransmission arrangement according to claim 5, is characterized in that, the described re-transmission passage that module creation is set up in described re-transmission adopts transmission control protocol TCP or datagram protocol.
10. packet loss retransmission arrangement according to claim 5, is characterized in that, described terminal is Set Top Box STB.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410419488.1A CN105357577A (en) | 2014-08-22 | 2014-08-22 | Packet loss retransmission method and device |
| PCT/CN2015/075070 WO2016026299A1 (en) | 2014-08-22 | 2015-03-25 | Method and device for retransmitting lost packet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410419488.1A CN105357577A (en) | 2014-08-22 | 2014-08-22 | Packet loss retransmission method and device |
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| CN105357577A true CN105357577A (en) | 2016-02-24 |
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| CN201410419488.1A Pending CN105357577A (en) | 2014-08-22 | 2014-08-22 | Packet loss retransmission method and device |
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| CN (1) | CN105357577A (en) |
| WO (1) | WO2016026299A1 (en) |
Cited By (4)
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| CN109155707A (en) * | 2016-06-03 | 2019-01-04 | 三菱电机株式会社 | The request data retransmission in multicast network |
| WO2020063341A1 (en) * | 2018-09-27 | 2020-04-02 | 华为技术有限公司 | Video transmission method and device |
| CN111817825A (en) * | 2020-09-07 | 2020-10-23 | 广东睿江云计算股份有限公司 | TCP data retransmission method and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107222825B (en) * | 2016-03-21 | 2021-08-06 | 阿尔卡特朗讯 | Method for a communication device, method for a base station, communication device and base station |
| CN113992654A (en) * | 2021-10-22 | 2022-01-28 | 西安热工研究院有限公司 | High-speed file transmission method, system, equipment and medium |
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| WO2016026299A1 (en) | 2016-02-25 |
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