CN110661726A - Data sending method and device based on multilink aggregation - Google Patents
Data sending method and device based on multilink aggregation Download PDFInfo
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- CN110661726A CN110661726A CN201910818949.5A CN201910818949A CN110661726A CN 110661726 A CN110661726 A CN 110661726A CN 201910818949 A CN201910818949 A CN 201910818949A CN 110661726 A CN110661726 A CN 110661726A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/90—Buffering arrangements
- H04L49/9084—Reactions to storage capacity overflow
- H04L49/9089—Reactions to storage capacity overflow replacing packets in a storage arrangement, e.g. pushout
- H04L49/9094—Arrangements for simultaneous transmit and receive, e.g. simultaneous reading/writing from/to the storage element
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/24—Multipath
- H04L45/245—Link aggregation, e.g. trunking
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/50—Queue scheduling
Abstract
The invention provides a data sending method and device based on multilink aggregation, which relate to the technical field of video networking and comprise the following steps: copying at least one target data packet from the first queue to the second queue when the at least one target data packet is received in the first queue; emptying the first queue; and sequentially sending at least one target data packet from the second queue to the video networking equipment according to a preset sequence and a preset sending interval. Copying the target data packet from the first queue to the second queue, emptying the first queue, sending the target data packet to the video networking equipment by the second queue, and enabling the data packet to be queued and dequeued simultaneously so as to ensure the packet sending efficiency of the data packet; the target data packets are sent to the video networking equipment according to the preset sequence and the preset sending intervals, so that the number and the time intervals of the data packets sent by the network cards corresponding to different communication links are the same, the data packets can be evenly and stably sent, the jitter degree of real-time bandwidth can be reduced, and the playing smoothness of the video networking terminal is improved.
Description
Technical Field
The invention relates to the technical field of video networking, in particular to a data sending method and device based on multilink aggregation.
Background
With the development of the technical field of video networking, the real-time bandwidth required for transmitting data is larger and larger. At present, when data is sent, data can be sent in a multilink aggregation mode, that is, each link corresponds to multiple network cards in the data sending device one by one, the data can be distributed to each network card after being shunted, and then each network card can send the data through the corresponding link.
However, in the process of directly sending data by adopting the multi-link aggregation method, because multiple network cards are independent of each other, the data volume sent by each network card in a unit time and the data volume sent by the same network card in different times are greatly different, so that the real-time bandwidth in the data sending process greatly jitters, and the video networking equipment receiving the data cannot smoothly play.
Disclosure of Invention
In view of the above, embodiments of the present invention are proposed in order to provide a data transmission method and apparatus based on multi-link aggregation that overcomes or at least partially solves the above problems.
In order to solve the above problem, an embodiment of the present invention discloses a data sending method based on multilink aggregation, which is applied to a graph transmission device, where the graph transmission device is connected to a video networking device through at least two communication links, and the method includes:
when the received at least one target data packet is stored in the first queue, copying the at least one target data packet from the first queue to a second queue;
emptying the first queue;
and sequentially sending the at least one target data packet from the second queue to the video networking equipment through the at least two communication links according to a preset sequence and a preset sending interval.
Optionally, after clearing the first queue, the method further includes:
receiving at least one latest data packet;
storing the at least one latest data packet into the first queue according to the receiving sequence of the at least one latest data packet;
and taking the at least one latest data packet as the at least one target data packet, and returning to execute the step of copying the at least one target data packet from the first queue to the second queue when the at least one received target data packet is stored in the first queue.
Optionally, the preset order is a sequence of the at least one target data packet stored in the second queue, and the sequentially sending the at least one target data packet from the second queue to the video networking device through the at least two communication links according to the preset order and the preset sending interval includes:
determining a target data packet which is stored in the second queue firstly from the target data packets left in the second queue;
sending the target data packet stored in the second queue to the video networking equipment;
determining whether the second queue contains the remaining target data packets;
and if the second queue has the residual target data packets, returning to the step of executing the target data packets left in the second queue and determining the target data packet which is stored in the second queue firstly.
Optionally, after determining whether the second queue stores the remaining target data packets, the method further includes:
if the second queue does not contain the remaining target data packets, returning to execute the step of copying the at least one target data packet from the first queue to the second queue when the first queue contains the received at least one target data packet.
Optionally, the target data packet is a panoramic camera data packet.
The invention also provides a data sending device based on multilink aggregation, which is applied to image transmission equipment, wherein the image transmission equipment is connected with the video network equipment through at least two communication links, and the device comprises:
a copying module, configured to copy the at least one target data packet from a first queue to a second queue when the at least one received target data packet is stored in the first queue;
an emptying module for emptying the first queue;
and the sending module is used for sequentially sending the at least one target data packet from the second queue to the video networking equipment through the at least two communication links according to a preset sequence and a preset sending interval.
Optionally, the apparatus further comprises:
a receiving module, configured to receive at least one latest data packet;
a storing module, configured to store the at least one latest data packet into the first queue according to a receiving order of the at least one latest data packet;
and the calling module is used for taking the at least one latest data packet as the at least one target data packet and calling the copying module to execute the step of copying the at least one target data packet from the first queue to the second queue when the received at least one target data packet is stored in the first queue.
Optionally, the preset order is an order of storing the at least one target data packet into the second queue, and the sending module includes:
a first determining submodule, configured to determine, from the remaining target data packets in the second queue, a target data packet that is stored in the second queue first;
the sending submodule is used for sending the target data packet firstly stored in the second queue to the video networking equipment;
a second determining submodule, configured to determine whether the second queue stores the remaining target data packets;
a first calling sub-module, configured to, if the remaining target data packets are stored in the second queue, call the first determining sub-module to perform the step of determining, from the remaining target data packets in the second queue, a target data packet that is first stored in the second queue.
Optionally, the sending module further includes:
a second invoking sub-module, configured to invoke the copying module to execute the step of copying the at least one target data packet from the first queue to the second queue when the at least one received target data packet is stored in the first queue if the second queue does not store the remaining target data packets.
Optionally, the target data packet is a panoramic camera data packet.
The embodiment of the invention has the following advantages:
in this embodiment of the present invention, when at least one received target packet is stored in a first queue, a graph transmission device copies the at least one target packet from the first queue to a second queue, then empties the first queue, and sequentially sends the at least one target packet from the second queue to an internet of view device through at least two communication links according to a preset sequence and a preset sending interval. In the embodiment of the present invention, after the graph transmission device copies the target data packet from the first queue to the second queue, the first queue may be emptied, and then the second queue may sequentially send the target data packet to the view network device, and at the same time, the first queue may receive a new data packet, that is, may implement simultaneous enqueuing and dequeuing of the data packet, thereby ensuring that the packet sending efficiency and the delay condition of the data packet are maintained at normal levels meeting requirements. Under the condition of ensuring basic packet sending efficiency and delay requirements, the image transmission equipment can send target data packets to the video networking equipment in sequence from the second queue according to a preset sequence and preset sending intervals, the quantity and the time intervals of the data packets sent by the network cards corresponding to different communication links within any time are ensured to be the same, and therefore the data packets can be sent uniformly and stably, the jitter degree of real-time bandwidth can be reduced, the video networking equipment can also receive the data packets uniformly and stably, and the playing fluency of the video networking terminal is improved.
Drawings
Fig. 1 is a flowchart illustrating a method for transmitting data based on multilink aggregation according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating a method for transmitting data based on multilink aggregation according to a second embodiment of the present invention;
fig. 3 is a flowchart of another method for transmitting data based on multilink aggregation according to a second embodiment of the present invention;
fig. 4 is a schematic structural diagram illustrating a data transmitting apparatus based on multilink aggregation according to a third embodiment of the present invention;
fig. 5 is a schematic structural diagram illustrating a data transmitting apparatus based on multilink aggregation according to a fourth embodiment of the present invention;
FIG. 6 is a networking schematic of a video network of the present invention;
FIG. 7 is a diagram of a hardware architecture of a node server according to the present invention;
fig. 8 is a schematic diagram of a hardware architecture of an access switch of the present invention;
fig. 9 is a schematic diagram of a hardware structure of an ethernet protocol conversion gateway according to the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Example one
Fig. 1 shows a flowchart of a method for a data sending method based on multilink aggregation according to an embodiment of the present invention, which is applied to an image transmission device, where the image transmission device is connected to a video network device through at least two communication links, as shown in fig. 1, where the method includes:
step 101, when at least one received target data packet is stored in the first queue, copying the at least one target data packet from the first queue to the second queue.
In this embodiment of the present invention, when the image transmission device receives at least one target data packet in a short time, each target data packet may be stored in the first queue according to the receiving sequence of each target data packet, at this time, each received target data packet is also stored in the first queue, and the image transmission device may copy each target data packet from the first queue to the second queue. Wherein, in a short time, several target data packets are received by the first queue, and the several target data packets are all copied from the first queue to the second queue.
In this embodiment of the present invention, after copying at least one target data packet from the first queue to the second queue, where the second queue stores at least one target data packet, the image transmission device empties the first queue, and the first queue may continue to receive new data packets at this time.
And 103, sequentially sending at least one target data packet from the second queue to the video networking equipment through at least two communication links according to a preset sequence and a preset sending interval.
The preset sequence may be a sequence of at least one target data packet stored in the second queue, the preset sending interval may be a sending time interval between every two target data packets, and the preset sending interval may be set in advance. Each communication link is respectively connected with a plurality of network cards in the image transmission equipment in a one-to-one correspondence manner, the video network equipment is in communication connection with a plurality of network cards in the image transmission equipment in a one-to-one correspondence manner, and the target data packet can be sent to the video network equipment through the network cards in the image transmission equipment.
In the embodiment of the present invention, when there are four communication links, the image transmission device sends a first data packet to be sent in a second queue to the video network device through a communication link corresponding to a first network card according to a preset sequence and a preset sending interval, sends a second data packet to be sent in the second queue to the video network device through a communication link corresponding to a second network card, sends a third data packet to be sent in the second queue to the video network device through a communication link corresponding to a third network card, sends a fourth data packet to be sent in the second queue to the video network device through a communication link corresponding to a fourth network card, sends a fifth data packet to be sent in the second queue to the video network device through a communication link corresponding to the first network card, and sends a sixth data packet to be sent in the second queue to the video network device through a communication link corresponding to the second network card, and sending a seventh data packet to be sent in the second queue to the video network device through a communication link corresponding to the third network card, sending an eighth data packet to be sent in the second queue to the video network device through a communication link corresponding to the fourth network card, and so on.
In addition, in practical applications, in order to avoid conflict between the calls of the packets in the queue, the queue needs to be locked, so that the locked queue can only perform one of enqueue and dequeue at the same time, and cannot perform enqueue and dequeue at the same time. However, when the inventor thinks about the concept, if only one queue is used to transmit at least one target data packet according to a preset transmission interval, because the queue needs to be locked when in use, the enqueue and the dequeue of the data packet cannot be performed at the same time, that is, the stored data packet cannot be transmitted from the queue while the data packet is stored in the queue, and a new data packet cannot be stored into the queue while the data packet is transmitted from the queue, so that the packet transmission efficiency of the data packet is seriously affected, and a serious delay problem is caused. In the embodiment of the present invention, the target data packet may be copied from the first queue to the second queue, and at this time, the first queue is emptied, and then the second queue may sequentially send the target data packet to the video network device, and at the same time, the first queue may receive a new data packet, that is, the data packet may enter the first queue and exit the second queue at the same time, so that the packet sending efficiency and the delay condition of the data packet may be maintained at a normal level meeting the requirements. On this basis, through according to predetermineeing the order and predetermineeing the transmission interval, send at least one target data package to the video networking equipment in proper order from the second queue, can guarantee under the condition of basic package efficiency of sending and the time delay requirement, evenly send the target data package for the video networking equipment steadily, so, can reduce the shake degree of real-time bandwidth in data transmission process, and then the video networking equipment also can evenly receive the target data package steadily, consequently, data in the target data package also can be broadcast by the smoothness.
In this embodiment of the present invention, when at least one received target packet is stored in a first queue, a graph transmission device copies the at least one target packet from the first queue to a second queue, then empties the first queue, and sequentially sends the at least one target packet from the second queue to an internet of view device through at least two communication links according to a preset sequence and a preset sending interval. In the embodiment of the present invention, after the graph transmission device copies the target data packet from the first queue to the second queue, the first queue may be emptied, and then the second queue may sequentially send the target data packet to the view network device, and at the same time, the first queue may receive a new data packet, that is, the data packet may enter the first queue and exit the second queue at the same time, so that the packet sending efficiency and the delay condition of the data packet may be maintained at a normal level meeting requirements. Under the condition of ensuring basic packet sending efficiency and delay requirements, the image transmission equipment can send target data packets to the video networking equipment in sequence from the second queue according to a preset sequence and preset sending intervals, the quantity and the time intervals of the data packets sent by the network cards corresponding to different communication links within any time are ensured to be the same, and therefore the data packets can be sent uniformly and stably, the jitter degree of real-time bandwidth can be reduced, the video networking equipment can also receive the data packets uniformly and stably, and the playing fluency of the video networking terminal is improved.
Example two
Fig. 2 shows a flowchart of a method for a data sending method based on multilink aggregation according to a second embodiment of the present invention, which is applied to an image transmission device, where the image transmission device is connected to a video network device through at least two communication links, as shown in fig. 2, the method includes:
step 201, when at least one received target data packet is stored in the first queue, copying the at least one target data packet from the first queue to the second queue.
In an embodiment of the invention, the first queue receives at least one target data packet and copies all received target data packets from the first queue to the second queue. For example, when a target packet is received in the first queue, the target packet is copied from the first queue to the second queue; for example, when two target data packets are received in the first queue, the two target data packets are copied from the first queue to the second queue.
The mapping device may determine whether the first queue contains at least one target packet received by determining whether the number of packets in the first queue is greater than zero. If the number of the data packets in the first queue is greater than zero, determining that at least one received target data packet exists in the first queue; if the number of data packets in the first queue is equal to zero, it is determined that at least one target data packet has not been received in the first queue.
In addition, before step 201, the graph transmission device may first perform an initialization service operation, and then create a thread to perform the steps in the embodiment of the present invention, where the queue data processing in the embodiment of the present invention is all completed in the same thread.
In this embodiment of the present invention, after copying at least one target data packet from the first queue to the second queue, where the second queue stores at least one target data packet, the image transmission device empties the first queue, and the first queue may continue to receive new target data packets.
In an embodiment of the present invention, the graph transmission device may receive at least one latest data packet after emptying the first queue.
In an embodiment of the present invention, the graph transmission device stores the latest data packet received first into the first queue and then stores the latest data packet received second into the first queue according to the receiving sequence of at least one latest data packet.
In the embodiment of the present invention, at least one latest data packet is taken as at least one target data packet, which means that the latest data packet is the target data packet, and the forwarding device returns to perform step 201, copy the at least one target data packet from the first queue to the second queue, perform subsequent steps 202 to 205, and loop.
And step 206, sequentially sending at least one target data packet from the second queue to the video networking equipment through at least two communication links according to a preset sequence and a preset sending interval.
In the embodiment of the invention, the image transmission equipment sequentially transmits at least one target data packet from the second queue to the video network equipment through at least two communication links according to the sequence of storing the at least one target data packet into the second queue and the preset transmission time interval between every two target data packets.
In addition, in practical applications, in order to avoid conflict between the calls of the packets in the queue, the queue needs to be locked, so that the locked queue can only perform one of enqueue and dequeue at the same time, and cannot perform enqueue and dequeue at the same time. However, when the inventor thinks about the concept, if only one queue is used to transmit at least one target data packet according to a preset transmission interval, because the queue needs to be locked when in use, the enqueue and the dequeue of the data packet cannot be performed at the same time, that is, the stored data packet cannot be transmitted from the queue while the data packet is stored in the queue, and a new data packet cannot be stored into the queue while the data packet is transmitted from the queue, so that the packet transmission efficiency of the data packet is seriously affected, and a serious delay problem is caused. In the embodiment of the present invention, the target data packet may be copied from the first queue to the second queue, and at this time, the first queue is emptied, and then the second queue may sequentially send the target data packet to the video network device, and at the same time, the first queue may receive a new data packet, that is, the data packet may enter the first queue and exit the second queue at the same time, so that the packet sending efficiency and the delay condition of the data packet may be maintained at a normal level meeting the requirements. On this basis, through according to predetermineeing the order and predetermineeing the transmission interval, send at least one target data package to the video networking equipment in proper order from the second queue, can guarantee under the condition of basic package efficiency of sending and the time delay requirement, evenly send the target data package for the video networking equipment steadily, so, can reduce the shake degree of real-time bandwidth in data transmission process, and then the video networking equipment also can evenly receive the target data package steadily, consequently, data in the target data package also can be broadcast by the smoothness.
In this embodiment of the present invention, step 203 and step 206 are executed after step 202 at the same time, that is, after the image transmission device empties the first queue, at least one latest data packet may be received and stored in the first queue, and at the same time, according to the preset sequence and the preset transmission interval, at least one target data packet is sequentially transmitted from the second queue to the video network device, so that while the process of transmitting the target data packet to the video network device in the second queue is performed, the first queue may receive at least one latest data packet, that is, the data packets may be simultaneously input into the first queue and output from the second queue, thereby ensuring that the packet transmission efficiency and the delay condition of the data packets are maintained at the normal level meeting the requirements. On this basis, through according to predetermineeing the order and predetermineeing the transmission interval, send at least one target data package to the video networking equipment in proper order from the second queue, can guarantee under the condition of basic package efficiency of sending and the time delay requirement, evenly send the target data package for the video networking equipment steadily, so, can reduce the shake degree of real-time bandwidth in data transmission process, and then the video networking equipment also can evenly receive the target data package steadily, consequently, data in the target data package also can be broadcast by the smoothness.
In this embodiment of the present invention, fig. 3 shows a flowchart of another method for transmitting data based on multilink aggregation according to the second embodiment of the present invention, and as shown in fig. 3, step 206 specifically includes:
In this embodiment of the present invention, the graph transmission device determines, from all the target data packets in the second queue, the target data packet that is copied into the second queue first by the first queue, that is, the target data packet that is stored into the second queue first.
In the embodiment of the invention, each communication link corresponds to a plurality of network cards in the image transmission equipment one by one, and the video network equipment is in communication connection with the network cards in the image transmission equipment, so that the target data packet can be sent to the video network equipment through the network cards in the image transmission equipment. For any communication link, the image transmission device copies the first queue into the target data packet of the second queue first, that is, the target data packet stored in the second queue first is sent to the video network device through the network card corresponding to the communication link.
At step 2063, it is determined whether there are remaining target packets in the second queue.
In the embodiment of the invention, after the graph transmission equipment sends the target data packet firstly stored in the second queue to the video networking equipment, whether the second queue contains the residual target data packet of the video networking equipment or not is determined.
The graph transmission device may determine whether the second queue stores the remaining target data packets of the video networking device by determining whether the number of the data packets in the second queue is greater than zero. If the number of the data packets in the second queue is greater than zero, the second queue stores the remaining target data packets; if the number of packets in the second queue is equal to zero, the second queue does not have any remaining target packets.
Step 2064, if there are remaining target data packets in the second queue, returning to execute the step of determining the target data packet stored in the second queue first from the remaining target data packets in the second queue.
In this embodiment of the present invention, when there are remaining target packets in the second queue, that is, when the number of packets in the second queue is greater than zero, the mapping apparatus returns to step 2061, and then executes steps 2062 and 2064 until there are no remaining target packets in the second queue, that is, until the number of packets in the second queue is equal to zero.
Step 2065, if there is no target data packet left in the second queue, returning to execute the step of copying at least one target data packet from the first queue to the second queue when there is at least one target data packet received in the first queue.
In this embodiment of the present invention, when there is no remaining target data packet in the second queue, that is, when the number of data packets in the second queue is equal to zero, the image transmission device returns to step 201, copies at least one target data packet from the first queue to the second queue, and performs subsequent steps 202 to 2065, until the image transmission device has a situation that there is no remaining target data packet in the second queue, then returns to step 201 again, and performs subsequent steps 202 to 2065, so as to loop.
Alternatively, the target data packet may be a panoramic camera data packet, and accordingly, the data in the target data packet may be video data shot by a panoramic camera. Of course, the target data packet is also a data packet including other data, which is not limited in this embodiment of the present invention.
For example, a panoramic camera may be connected to the mobile command car, the panoramic camera is connected to the image transmission device, and the panoramic camera transmits the shot data to a command center located outside the mobile command car through a network card in the image transmission device. The code rate (the number of data bits transmitted per unit time during data transmission) of the panoramic camera is 15 to 30 megabits. The data packet is transmitted by adopting the multilink aggregated data transmission method in the embodiment of the invention, each link corresponds to one network card, the panoramic camera is in communication connection with six network cards in the image transmission equipment, and the command center is in communication connection with six network cards in the image transmission equipment. If the mapping device needs to send 15 × 1024 ═ 15360 packets in one second, and the mapping device has six network cards, that is, six communication links, and each network card needs to send 15 × 1024/6 ═ 2560 packets in one second, the total time of the sending time of one packet and the sending interval time is 1/2560 ═ 0.00039 seconds, that is, 0.39 milliseconds, and assuming that the sending time of one packet may be 0.29 milliseconds, one sending interval time is 0.39-0.29 ═ 0.1 milliseconds, so 0.1 millisecond may be set as the preset sending interval. Then, the image transmission device sequentially sends the 15360 data packets from the second queue of the image transmission device to the command center through six communication links according to the sequence of storing the at least one target data packet into the second queue and the preset sending interval of 0.1 millisecond, wherein the network card corresponding to each communication link can complete the sending of 2560 data packets.
In an embodiment of the present invention, when at least one received target packet exists in a first queue, a graph transmission device copies at least one target packet from the first queue to a second queue, then clears the first queue, then receives at least one latest packet, stores the at least one latest packet in the first queue according to a receiving sequence of the at least one latest packet, uses the at least one latest packet as the at least one target packet, and returns to perform a step of copying the at least one target packet from the first queue to the second queue when the at least one received target packet exists in the first queue, and sequentially transmits the at least one target packet from the second queue to an image networking device through at least two communication links according to a preset sequence and a preset transmission interval. In the embodiment of the present invention, after the graph transmission device copies the target data packet from the first queue to the second queue, the first queue may be emptied, and then the second queue may sequentially send the target data packet to the view network device, and at the same time, the first queue may receive a new data packet, that is, the data packet may enter the first queue and exit the second queue at the same time, so that the packet sending efficiency and the delay condition of the data packet may be maintained at a normal level meeting requirements. Under the condition of ensuring basic packet sending efficiency and delay requirements, the image transmission equipment can send target data packets to the video networking equipment in sequence from the second queue according to a preset sequence and preset sending intervals, the quantity and the time intervals of the data packets sent by the network cards corresponding to different communication links within any time are ensured to be the same, and therefore the data packets can be sent uniformly and stably, the jitter degree of real-time bandwidth can be reduced, the video networking equipment can also receive the data packets uniformly and stably, and the playing fluency of the video networking terminal is improved.
EXAMPLE III
Fig. 4 is a schematic structural diagram of a data sending apparatus based on multilink aggregation according to a third embodiment of the present invention, which is applied to an image transmission device, where the image transmission device is connected to a video network device through at least two communication links, and the data sending apparatus 300 includes:
a copying module 301, configured to copy, when at least one received target data packet exists in the first queue, the at least one received target data packet from the first queue to the second queue;
a flush module 302 for flushing the first queue;
a sending module 303, configured to send at least one target data packet from the second queue to the video networking device in sequence through at least two communication links according to a preset sequence and a preset sending interval.
In this embodiment of the present invention, when at least one received target packet is stored in a first queue, a graph transmission device copies the at least one target packet from the first queue to a second queue through a copy module, then empties the first queue through an emptying module, and then sequentially sends the at least one target packet from the second queue to an internet of view device through at least two communication links according to a preset sequence and a preset sending interval through a sending module. In the embodiment of the present invention, after the graph transmission device copies the target data packet from the first queue to the second queue, the first queue may be emptied, and then the second queue may sequentially send the target data packet to the view network device, and at the same time, the first queue may receive a new data packet, that is, the data packet may enter the first queue and exit the second queue at the same time, so that the packet sending efficiency and the delay condition of the data packet may be maintained at a normal level meeting requirements. Under the condition of ensuring basic packet sending efficiency and delay requirements, the image transmission equipment can send target data packets to the video networking equipment in sequence from the second queue according to a preset sequence and preset sending intervals, the quantity and the time intervals of the data packets sent by the network cards corresponding to different communication links within any time are ensured to be the same, and therefore the data packets can be sent uniformly and stably, the jitter degree of real-time bandwidth can be reduced, the video networking equipment can also receive the data packets uniformly and stably, and the playing fluency of the video networking terminal is improved.
Example four
Fig. 5 is a schematic structural diagram of a data sending apparatus based on multilink aggregation according to a fourth embodiment of the present invention, which is applied to an image transmission device, where the image transmission device is connected to a video network device through at least two communication links, and the data sending apparatus 400 includes:
a copying module 401, configured to copy, when at least one received target data packet exists in the first queue, the at least one received target data packet from the first queue to the second queue;
a flush module 402 for flushing the first queue;
a sending module 403, configured to send at least one target data packet from the second queue to the video networking device in sequence through at least two communication links according to a preset sequence and a preset sending interval.
Optionally, referring to fig. 5, the data transmitting apparatus 400 further includes:
a receiving module 404, configured to receive at least one latest data packet;
a storing module 405, configured to store at least one latest data packet into the first queue according to a receiving sequence of the at least one latest data packet;
a calling module 406, configured to take the at least one latest data packet as the at least one target data packet, and call the copying module to perform the step of copying the at least one target data packet from the first queue to the second queue when the received at least one target data packet is stored in the first queue.
Optionally, the preset sequence is a sequence of at least one target data packet stored in the second queue, referring to fig. 5, the sending module 403 includes:
a first determining submodule 4031, configured to determine, from the remaining target data packets in the second queue, a target data packet that is stored in the second queue first;
the sending submodule 4032 is used for sending the target data packet stored in the second queue to the video networking equipment;
a second determining sub-module 4033, configured to determine whether there are remaining target data packets in the second queue;
the first invoking sub-module 4034 is configured to invoke the first determining sub-module to perform the step of determining the target data packet stored in the second queue first from among the remaining target data packets in the second queue if the remaining target data packets are stored in the second queue.
Optionally, referring to fig. 5, the sending module 403 further includes:
a second invoking sub-module 4035, configured to invoke the copy module to perform the step of copying the at least one target data packet from the first queue to the second queue when the received at least one target data packet exists in the first queue if the second queue does not exist any target data packets.
Optionally, the target data packet is a panoramic camera data packet.
In the embodiment of the invention, when at least one target data packet is received in a first queue, the graph transmission device copies the at least one target data packet from the first queue to a second queue through a copying module, then empties the first queue through an emptying module, sequentially transmits the at least one target data packet from the second queue to the video network device through at least two communication links according to a preset sequence and a preset transmission interval through a transmission module, receives at least one latest data packet through a receiving module while passing through the transmission module, then stores the at least one latest data packet into the first queue through a storing module according to a receiving sequence of the at least one latest data packet, uses the at least one latest data packet as the at least one target data packet through an execution module, and returns to execute when the at least one target data packet is received in the first queue, copying at least one target data packet from the first queue to the second queue. After the graph transmission device copies the target data packet from the first queue to the second queue, the first queue can be emptied, then the second queue can sequentially send the target data packet to the video network device, and meanwhile, the first queue can receive a new data packet, namely, the data packet can enter the first queue and exit the second queue at the same time, so that the packet sending efficiency and the delay condition of the data packet can be maintained at a normal level meeting requirements. Under the condition of ensuring basic packet sending efficiency and delay requirements, the image transmission equipment can send target data packets to the video networking equipment in sequence from the second queue according to a preset sequence and preset sending intervals, the quantity and the time intervals of the data packets sent by the network cards corresponding to different communication links within any time are ensured to be the same, and therefore the data packets can be sent uniformly and stably, the jitter degree of real-time bandwidth can be reduced, the video networking equipment can also receive the data packets uniformly and stably, and the playing fluency of the video networking terminal is improved.
For the device embodiment, since it is basically similar to the method embodiment, the description is simple, and for the relevant points, refer to the partial description of the method embodiment.
The video networking is an important milestone for network development, is a real-time network, can realize high-definition video real-time transmission, and pushes a plurality of internet applications to high-definition video, and high-definition faces each other.
The video networking adopts a real-time high-definition video exchange technology, can integrate required services such as dozens of services of video, voice, pictures, characters, communication, data and the like in a system on a network system, such as high-definition video conference, video monitoring, intelligent monitoring analysis, emergency command, digital broadcast television, delayed television, network teaching, live broadcast, VOD on demand, television mail, Personal Video Recorder (PVR), intranet (self-office) channels, intelligent video broadcast control, information distribution and the like, and realizes high-definition quality video broadcast through a television or a computer.
To better understand the embodiments of the present invention, the following description refers to the internet of view:
some of the technologies applied in the video networking are as follows:
network Technology (Network Technology)
Network technology innovation in video networking has improved over traditional Ethernet (Ethernet) to face the potentially enormous video traffic on the network. Unlike pure network Packet Switching (Packet Switching) or network Circuit Switching (Circuit Switching), the Packet Switching is adopted by the technology of the video networking to meet the Streaming requirement. The video networking technology has the advantages of flexibility, simplicity and low price of packet switching, and simultaneously has the quality and safety guarantee of circuit switching, thereby realizing the seamless connection of the whole network switching type virtual circuit and the data format.
Switching Technology (Switching Technology)
The video network adopts two advantages of asynchronism and packet switching of the Ethernet, eliminates the defects of the Ethernet on the premise of full compatibility, has end-to-end seamless connection of the whole network, is directly communicated with a user terminal, and directly bears an IP data packet. The user data does not require any format conversion across the entire network. The video networking is a higher-level form of the Ethernet, is a real-time switching system, can realize the large-scale high-definition video real-time transmission of the whole network which can not be realized by the existing Internet, and pushes a plurality of network video applications to high-definition and unification.
Server Technology (Server Technology)
The server technology on video networking and unified video system is different from the traditional server, the streaming media transmission is established on the basis of connection orientation, the data processing capacity is independent of flow and communication time, and a single network layer can contain signaling and data transmission. For voice and video services, the complexity of streaming media processing of video networking and unified video systems is much simpler than that of data processing, and the efficiency is greatly improved by more than one hundred times compared with that of a traditional server.
Storage Technology (Storage Technology)
The super-high speed memory technology of the unified video system adopts the most advanced real-time operating system in order to adapt to the media content with super-large capacity and super-large flow, the program information in the server instruction is mapped to the specific hard disk space, the media content is not passed through the server any more, and is instantly and directly sent to the user terminal, and the user waiting time is less than 0.2 second. The optimized sector distribution greatly reduces the mechanical motion of the magnetic head track seeking of the hard disk, the resource consumption only accounts for 20% of that of the IP internet of the same grade, but concurrent flow which is 3 times larger than that of the traditional hard disk array is generated, and the comprehensive efficiency is improved by more than 10 times.
Network Security Technology (Network Security Technology)
The structural design of the video network completely eliminates the network security problem troubling the internet structurally by the modes of independent service permission control each time, complete isolation of equipment and user data and the like, generally does not need antivirus programs and firewalls, avoids the attack of hackers and viruses, and provides a structural carefree security network for users.
Service Innovation Technology (Service Innovation Technology)
The unified video system integrates services and transmission, and is not only automatically connected once whether a single user, a private network user or a network aggregate. The user terminal, the set-top box or the PC are directly connected to the unified video system to obtain various multimedia video services in various forms. The unified video system adopts a menu type matching table mode to replace the traditional complex application programming, can realize complex application by using very few codes, and realizes new infinite business innovation.
Networking of the video network is as follows:
the video network is a centralized control network structure, and the network can be a tree network, a star network, a ring network and the like, but on the basis of the centralized control node, the whole network is controlled by the centralized control node in the network.
As shown in fig. 6, the video network is divided into an access network and a metropolitan network.
The devices of the access network part can be mainly classified into 3 types: node server, access switch, terminal (including various set-top boxes, coding boards, memories, etc.). The node server is connected to an access switch, which may be connected to a plurality of terminals and may be connected to an ethernet network.
The node server is a node which plays a centralized control function in the access network and can control the access switch and the terminal. The node server can be directly connected with the access switch or directly connected with the terminal.
Similarly, devices of the metropolitan network portion may also be classified into 3 types: a metropolitan area server, a node switch and a node server. The metro server is connected to a node switch, which may be connected to a plurality of node servers.
The node server is a node server of the access network part, namely the node server belongs to both the access network part and the metropolitan area network part.
The metropolitan area server is a node which plays a centralized control function in the metropolitan area network and can control a node switch and a node server. The metropolitan area server can be directly connected with the node switch or directly connected with the node server.
Therefore, the whole video network is a network structure with layered centralized control, and the network controlled by the node server and the metropolitan area server can be in various structures such as tree, star and ring.
The access network part can form a unified video system (the part in the dotted circle), and a plurality of unified video systems can form a video network; each unified video system may be interconnected via metropolitan and wide area video networks.
1. Video networking device classification
1.1 devices in the video network of the embodiment of the present invention can be mainly classified into 3 types: server, exchanger (including Ethernet protocol conversion gateway), terminal (including various set-top boxes, code board, memory, etc.). The video network as a whole can be divided into a metropolitan area network (or national network, global network, etc.) and an access network.
1.2 wherein the devices of the access network part can be mainly classified into 3 types: node server, access exchanger (including Ethernet protocol conversion gateway), terminal (including various set-top boxes, coding board, memory, etc.).
The specific hardware structure of each access network device is as follows:
a node server:
as shown in fig. 7, the system mainly includes a network interface module 501, a switching engine module 502, a CPU module 503, and a disk array module 504;
the network interface module 501, the CPU module 503 and the disk array module 504 all enter the switching engine module 502; the switching engine module 502 performs an operation of looking up the address table 505 on the incoming packet, thereby obtaining the direction information of the packet; and stores the packet in a corresponding queue of the packet buffer 506 based on the packet's steering information; if the queue of the packet buffer 506 is nearly full, it is discarded; the switching engine module 502 polls all packet buffer queues for forwarding if the following conditions are met: 1) the port send buffer is not full; 2) the queue packet counter is greater than zero. The disk array module 504 mainly implements control over the hard disk, including initialization, read-write, and other operations of the hard disk; the CPU module 503 is mainly responsible for protocol processing with an access switch and a terminal (not shown in the figure), configuring an address table 505 (including a downlink data packet address table, an uplink data packet address table, and a data packet address table), and configuring the disk array module 504.
The access switch:
as shown in fig. 8, the network interface module (downlink network interface module 601, uplink network interface module 602), switching engine module 603, and CPU module 604 are mainly included;
wherein, the packet (uplink data) coming from the downlink network interface module 601 enters the packet detection module 605; the packet detection module 605 detects whether the Destination Address (DA), the Source Address (SA), the type of the packet, and the length of the packet meet the requirements, if so, allocates a corresponding stream identifier (stream-id) and enters the switching engine module 603, otherwise, discards the stream identifier; the packet (downstream data) coming from the upstream network interface module 602 enters the switching engine module 603; the incoming data packet from the CPU module 604 enters the switching engine module 603; the switching engine module 603 performs an operation of looking up the address table 606 on the incoming packet, thereby obtaining the direction information of the packet; if the packet entering the switching engine module 603 is from the downstream network interface to the upstream network interface, the packet is stored in the queue of the corresponding packet buffer 607 in association with the stream-id; if the queue of the packet buffer 607 is close to full, it is discarded; if the packet entering the switching engine module 603 is not from the downlink network interface to the uplink network interface, the packet is stored in the queue of the corresponding packet buffer 607 according to the packet guiding information; if the queue of the packet buffer 607 is close to full, it is discarded.
The switching engine module 603 polls all packet buffer queues, which in this embodiment of the present invention is divided into two cases:
if the queue is from the downlink network interface to the uplink network interface, the following conditions are met for forwarding: 1) the port send buffer is not full; 2) the queued packet counter is greater than zero; 3) obtaining a token generated by a code rate control module;
if the queue is not from the downlink network interface to the uplink network interface, the following conditions are met for forwarding: 1) the port send buffer is not full; 2) the queue packet counter is greater than zero.
The rate control module 608 is configured by the CPU module 604 and generates tokens for packet buffer queues going to the upstream network interface from all downstream network interfaces at programmable intervals to control the rate of upstream forwarding.
The CPU module 604 is mainly responsible for protocol processing with the node server, configuration of the address table 606, and configuration of the code rate control module 608.
Ethernet protocol conversion gateway：
As shown in fig. 9, the system mainly includes a network interface module (a downlink network interface module 701, an uplink network interface module 702), a switching engine module 703, a CPU module 704, a packet detection module 705, a rate control module 708, an address table 706, a packet buffer 707, a MAC adding module 709, and a MAC deleting module 410.
Wherein, the data packet coming from the downlink network interface module 701 enters the packet detection module 705; the packet detection module 705 detects whether the ethernet MAC DA, the ethernet MAC SA, the ethernet length or frame type, the video network destination address DA, the video network source address SA, the video network packet type and the packet length of the packet meet the requirements, and if so, allocates a corresponding stream identifier (stream-id); then, the MAC deletion module 410 subtracts MAC DA, MAC SA, length or frame type (2byte) and enters the corresponding receiving buffer, otherwise, discards it;
the downlink network interface module 701 detects the sending buffer of the port, and if a packet exists, the downlink network interface module learns the ethernet MAC DA of the corresponding terminal according to the destination address DA of the packet, adds the ethernet MAC DA of the terminal, the MACSA of the ethernet coordination gateway, and the ethernet length or frame type, and sends the packet.
The other modules in the ethernet protocol gateway function similarly to the access switch.
A terminal:
the system mainly comprises a network interface module, a service processing module and a CPU module; for example, the set-top box mainly comprises a network interface module, a video and audio coding and decoding engine module and a CPU module; the coding board mainly comprises a network interface module, a video and audio coding engine module and a CPU module; the memory mainly comprises a network interface module, a CPU module and a disk array module.
1.3 devices of the metropolitan area network part can be mainly classified into 2 types: node server, node exchanger, metropolitan area server. The node switch mainly comprises a network interface module, a switching engine module and a CPU module; the metropolitan area server mainly comprises a network interface module, a switching engine module and a CPU module.
2. Video networking packet definition
2.1 Access network packet definition
The data packet of the access network mainly comprises the following parts: destination Address (DA), Source Address (SA), reserved bytes, payload (pdu), CRC.
As shown in the following table, the data packet of the access network mainly includes the following parts:
| DA | SA | Reserved | Payload | CRC |
wherein:
the Destination Address (DA) is composed of 8 bytes (byte), the first byte represents the type of the data packet (such as various data packets, multicast data packets, unicast data packets, etc.), there are 256 possibilities at most, the second byte to the sixth byte are metropolitan area network addresses, and the seventh byte and the eighth byte are access network addresses;
the Source Address (SA) is also composed of 8 bytes (byte), defined as the same as the Destination Address (DA);
the reserved byte consists of 2 bytes;
the payload part has different lengths according to different types of datagrams, and is 64 bytes if various data packets are available, and is 32+1024 or 1056 bytes if a single multicast data packet is available, but of course, the length is not limited to the above 2 types;
the CRC consists of 4 bytes and is calculated in accordance with the standard ethernet CRC algorithm.
2.2 metropolitan area network packet definition
The topology of a metropolitan area network is a graph and there may be 2, or even more than 2, connections between two devices, i.e., there may be more than 2 connections between a node switch and a node server, a node switch and a node switch, and a node switch and a node server. However, the metro network address of the metro network device is unique, and in order to accurately describe the connection relationship between the metro network devices, parameters are introduced in the embodiment of the present invention: a label to uniquely describe a metropolitan area network device.
In this specification, the definition of the Label is similar to that of the Label of MPLS (Multi-Protocol Label Switch), and assuming that there are two connections between the device a and the device B, there are 2 labels for the packet from the device a to the device B, and 2 labels for the packet from the device B to the device a. The label is classified into an incoming label and an outgoing label, and assuming that the label (incoming label) of the packet entering the device a is 0x0000, the label (outgoing label) of the packet leaving the device a may become 0x 0001. The network access process of the metro network is a network access process under centralized control, that is, address allocation and label allocation of the metro network are both dominated by the metro server, and the node switch and the node server are both passively executed, which is different from label allocation of MPLS, and label allocation of MPLS is a result of mutual negotiation between the switch and the server.
As shown in the following table, the data packet of the metro network mainly includes the following parts:
| DA | SA | Reserved | label (R) | Payload | CRC |
Namely Destination Address (DA), Source Address (SA), Reserved byte (Reserved), tag, payload (pdu), CRC. The format of the tag may be defined by reference to the following: the tag is 32 bits with the upper 16 bits reserved and only the lower 16 bits used, and its position is between the reserved bytes and payload of the packet.
Based on the characteristics of the video network, one of the core concepts of the embodiments of the present invention is provided, in the image transmission device, the target data packets in the first queue are copied from the first queue to the second queue, the first queue is cleared, and the target data packets in the second queue are sent to the video network device according to the preset sequence and the preset time interval, so that the internet device can uniformly receive the target data packets, thereby ensuring that the video network terminal can realize smooth playing.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing terminal to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing terminal to cause a series of operational steps to be performed on the computer or other programmable terminal to produce a computer implemented process such that the instructions which execute on the computer or other programmable terminal provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
The present invention provides a data transmission method and apparatus based on multilink aggregation, which are introduced in detail above, and the principle and implementation of the present invention are explained herein by applying specific examples, and the description of the above embodiments is only used to help understanding the method and core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A data transmission method based on multilink aggregation is applied to a graph transmission device, wherein the graph transmission device is connected with a video network device through at least two communication links, and the method comprises the following steps:
when the received at least one target data packet is stored in the first queue, copying the at least one target data packet from the first queue to a second queue;
emptying the first queue;
and sequentially sending the at least one target data packet from the second queue to the video networking equipment through the at least two communication links according to a preset sequence and a preset sending interval.
2. The method of claim 1, wherein after flushing the first queue, further comprising:
receiving at least one latest data packet;
storing the at least one latest data packet into the first queue according to the receiving sequence of the at least one latest data packet;
and taking the at least one latest data packet as the at least one target data packet, and returning to execute the step of copying the at least one target data packet from the first queue to the second queue when the at least one received target data packet is stored in the first queue.
3. The method according to claim 1, wherein the preset sequence is a sequence of storing the at least one target packet into the second queue, and the sequentially sending the at least one target packet from the second queue to the video networking device through the at least two communication links according to the preset sequence and the preset sending interval comprises:
determining a target data packet which is stored in the second queue firstly from the target data packets left in the second queue;
sending the target data packet stored in the second queue to the video networking equipment;
determining whether the second queue contains the remaining target data packets;
and if the second queue has the residual target data packets, returning to the step of executing the target data packets left in the second queue and determining the target data packet which is stored in the second queue firstly.
4. The method of claim 3, wherein after determining whether the target packet remains in the second queue, further comprising:
if the second queue does not contain the remaining target data packets, returning to execute the step of copying the at least one target data packet from the first queue to the second queue when the first queue contains the received at least one target data packet.
5. The method of any one of claims 1 to 4, wherein the target data packet is a panoramic camera data packet.
6. A data sending device based on multilink aggregation is applied to image transmission equipment, wherein the image transmission equipment is connected with video networking equipment through at least two communication links, and the device comprises:
a copying module, configured to copy the at least one target data packet from a first queue to a second queue when the at least one received target data packet is stored in the first queue;
an emptying module for emptying the first queue;
and the sending module is used for sequentially sending the at least one target data packet from the second queue to the video networking equipment through the at least two communication links according to a preset sequence and a preset sending interval.
7. The apparatus of claim 6, further comprising:
a receiving module, configured to receive at least one latest data packet;
a storing module, configured to store the at least one latest data packet into the first queue according to a receiving order of the at least one latest data packet;
and the calling module is used for taking the at least one latest data packet as the at least one target data packet and calling the copying module to execute the step of copying the at least one target data packet from the first queue to the second queue when the received at least one target data packet is stored in the first queue.
8. The apparatus of claim 6, wherein the predetermined sequence is a sequence in which the at least one target packet is stored in the second queue, and the sending module comprises:
a first determining submodule, configured to determine, from the remaining target data packets in the second queue, a target data packet that is stored in the second queue first;
the sending submodule is used for sending the target data packet firstly stored in the second queue to the video networking equipment;
a second determining submodule, configured to determine whether the second queue stores the remaining target data packets;
a first calling sub-module, configured to, if the remaining target data packets are stored in the second queue, call the first determining sub-module to perform the step of determining, from the remaining target data packets in the second queue, a target data packet that is first stored in the second queue.
9. The apparatus of claim 8, wherein the sending module further comprises:
a second invoking sub-module, configured to invoke the copying module to execute the step of copying the at least one target data packet from the first queue to the second queue when the at least one received target data packet is stored in the first queue if the second queue does not store the remaining target data packets.
10. The apparatus of any one of claims 6 to 9, wherein the target data packet is a panoramic camera data packet.
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| CN111865827B (en) * | 2020-08-31 | 2023-10-27 | 上海兆芯集成电路股份有限公司 | Data link layer device and packing method thereof |
| CN113645662B (en) * | 2021-08-17 | 2023-08-18 | 中国联合网络通信集团有限公司 | Service processing method and device |
| CN113692007A (en) * | 2021-08-26 | 2021-11-23 | 安徽听见科技有限公司 | Data transmission method, device, system, storage medium and terminal equipment |
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Application publication date: 20200107 |