CN115459873B - Data transmission method, storage medium and device applied to network device - Google Patents
Data transmission method, storage medium and device applied to network device Download PDFInfo
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Abstract
A data transmission method, a storage medium and a device applied to a network device, wherein the method comprises: after receiving data packets from other devices except the network device, acquiring tag information; the tag information includes: time tag information; writing the acquired tag information into the data packet; and forwarding the data packet carrying the label information.
Description
Technical Field
The present invention relates to data transmission technologies, and in particular, to a data transmission method, a storage medium, and a device applied to a network device.
Background
With the popularization of the internet and the development of virtual reality technology, the metauniverse age is currently entering. In the metauniverse era, online and offline are integrated, virtual space and physical space are related to each other, which has great influence on multiple fields of education, games, communication and the like, and new demands are also put forward for new information systems.
In a metauniverse network, a large number of sensors exist to acquire multidimensional information such as vision, hearing, feeling and the like; the information receiver can generate the effect comparable with the effect of the personally on the scene by fusing and summarizing the information. In order to realize multidimensional information fusion, the information receiver needs to sort the received information according to the original sending sequence of the information. To assist the information receiver in ordering the received information in the original order of transmission, the prior art has considered achieving this by synchronizing between the sensors.
However, the current sensor generally has no continuous energy source, more energy sources are required to be consumed for realizing time synchronization, and more calculation cost is required for a time synchronization algorithm, so that the research result is limited in the direction of realizing the sensor synchronization.
Disclosure of Invention
The application provides a data transmission method, a storage medium and equipment applied to network equipment, which are beneficial to realizing that an information receiver sorts received information according to the original sending sequence of the information.
The application provides a data transmission method applied to network equipment, which comprises the following steps:
after receiving data packets from other devices except the network device, acquiring tag information; the tag information includes: time tag information;
writing the acquired tag information into the data packet;
and forwarding the data packet carrying the label information.
As an example, the acquiring tag information includes:
and calculating the sending time of the data packet according to the recorded round trip time delay for transmitting data between the network equipment and the other equipment and the acquired current time stamp, and taking the sending time of the data packet as the time tag information.
As an example, the current timestamp T is obtained from the recorded round trip delay for transmitting data between the present network device and the other device Currently, the method is that Calculating the sending time of the data packet, including:
calculating the sending time of the data packet according to the following formula:
T transmitting ＝T Currently, the method is that -RTT/2；
Wherein T is Transmitting Indicating the transmission time of the data packet, and RTT indicating the round trip delay of transmitting data between the present network device and the other device.
As an example, the acquiring tag information further includes:
based on the recorded round trip delay for transmitting data between the network device and the other devices and the obtained current timestamp T Currently, the method is that Before calculating the sending time of the data packet, updating and recording the round trip time delay;
the updating and recording the round trip delay comprises the following steps:
acquiring the time difference between sending data and receiving response data of the data by the network equipment;
updating the round trip delay according to RTT2 = p t+ (1-p) RTT 1;
wherein p is a constant and 0< p <1; t represents a time difference between transmitting data and receiving response data of the data by the network device, RTT2 represents a round trip delay after updating, and RTT1 represents a round trip delay before updating.
As an example, obtaining a time difference between sending data and receiving response data of the data by the network device includes:
when data is sent, judging whether handshake data is received after the data is sent, if yes, recording a time stamp for sending the data;
after receiving the handshake data, recording a time stamp for receiving the handshake data;
and determining the time difference according to the time stamp of the sending data and the time stamp of the receiving handshake data.
As an example, the tag information further includes: position tag information.
As an example, the method further comprises:
after receiving data packets from other devices except the network, judging whether the data packets need to be labeled according to a preset criterion before acquiring label information, and acquiring the label information if the data packets need to be labeled.
As an example, the preset criteria include:
labeling all data packets to be forwarded; or (b)
Labeling the data packet which is to be forwarded and has the length smaller than a preset threshold value; or (b)
And labeling the data packet which is to be forwarded and carries the preset field.
As an example, writing the acquired tag information into the data packet includes:
when the data packet is an IPv6 data packet, writing the acquired label information into a destination extension header of the IPv6 data packet;
when the data packet is a SRv data packet, writing the acquired tag information into an extension header of the SRv data packet;
and when the data packet is an IPv4 data packet, writing the acquired tag information into an option field of the IPv4 data packet.
Embodiments of the present application also provide a computer-readable storage medium storing one or more programs executable by one or more processors to implement a method as described in any of the preceding.
The embodiment of the application also provides a network device, which comprises a memory and a processor, wherein the memory stores a program, and the program realizes the method in any one of the previous steps when being read and executed by the processor.
In the technical scheme described in the embodiment of the application, after the network device writes the time tag information into the received data packet from other devices except the network device, the data packet is forwarded, so that the receiving terminal of the data packet is beneficial to sequencing the data packet according to the time tag information after receiving the data carrying the time tag information.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application. Other advantages of the present application may be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
The accompanying drawings are included to provide an understanding of the technical aspects of the present application, and are incorporated in and constitute a part of this specification, illustrate the technical aspects of the present application and together with the examples of the present application, and not constitute a limitation of the technical aspects of the present application.
Fig. 1 is a flowchart of a data transmission method applied to a network device according to an embodiment of the present application;
fig. 2 is a schematic diagram of a destination extension header format of an IPv6 packet according to an embodiment of the present application;
fig. 3 is a schematic diagram of writing tag information in the extension header SRH of the SRv packet according to an embodiment of the present application;
fig. 4 is a flowchart of another data transmission method applied to a network device according to an embodiment of the present application;
FIG. 5 is a schematic diagram of a network architecture involved in an example of application of the present application;
fig. 6 is a block diagram of a network device according to an embodiment of the present application.
Detailed Description
The present application describes a number of embodiments, but the description is illustrative and not limiting and it will be apparent to those of ordinary skill in the art that many more embodiments and implementations are possible within the scope of the embodiments described herein. Although many possible combinations of features are shown in the drawings and discussed in the detailed description, many other combinations of the disclosed features are possible. Any feature or element of any embodiment may be used in combination with or in place of any other feature or element of any other embodiment unless specifically limited.
The present application includes and contemplates combinations of features and elements known to those of ordinary skill in the art. The embodiments, features and elements of the present disclosure may also be combined with any conventional features or elements to form a unique inventive arrangement as defined in the claims. Any feature or element of any embodiment may also be combined with features or elements from other inventive arrangements to form another unique inventive arrangement as defined in the claims. Thus, it should be understood that any of the features shown and/or discussed in this application may be implemented alone or in any suitable combination. Accordingly, the embodiments are not to be restricted except in light of the attached claims and their equivalents. Further, various modifications and changes may be made within the scope of the appended claims.
Furthermore, in describing representative embodiments, the specification may have presented the method and/or process as a particular sequence of steps. However, to the extent that the method or process does not rely on the particular order of steps set forth herein, the method or process should not be limited to the particular sequence of steps described. Other sequences of steps are possible as will be appreciated by those of ordinary skill in the art. Accordingly, the particular order of the steps set forth in the specification should not be construed as limitations on the claims. Furthermore, the claims directed to the method and/or process should not be limited to the performance of their steps in the order written, and one skilled in the art can readily appreciate that the sequences may be varied and still remain within the spirit and scope of the embodiments of the present application.
The embodiment of the application provides a data transmission method applied to network equipment, as shown in fig. 1, the method includes:
step S101, after receiving data packets from other devices except the network device, acquiring tag information;
the tag information includes: time tag information;
step S102, writing the acquired label information into the data packet;
step S103 performs forwarding operation on the data packet carrying the tag information.
The network device according to the embodiment of the present application generally refers to a packet forwarding device, where the forwarding operation of the packet may be forwarding a packet from an external network device to an internal network device, forwarding a packet from an internal network device to an external network device, forwarding a packet between internal network devices, and so on.
In this embodiment of the present application, after the network device writes time tag information into a received data packet from the other device, the data packet is forwarded, which is favorable for the receiving terminal of the data packet to sort the data packet according to the time tag information after receiving the data carrying the time tag information.
In an exemplary embodiment, the types of the network devices may include: network access equipment, routing equipment and network switching equipment; the type of the other devices may be the same as the type of the network device or different from the type of the network device, for example, the other devices may be an information acquisition device or an information sensing device.
In an exemplary embodiment, obtaining time tag information includes:
calculating the sending time of the data packet according to the recorded round trip time delay for transmitting data between the network equipment and the other equipment and the acquired current time stamp, and taking the sending time of the data packet as the time tag information; the Round trip delay for transmitting data between the present network device and the other devices is typically expressed using (Round-trip, RTT).
In an exemplary embodiment, calculating the sending time of the data packet according to the recorded round trip delay of the data transmitted between the present network device and the other devices and the obtained current timestamp includes:
calculating the sending time of the data packet according to the following formula:
T transmitting ＝T Currently, the method is that -RTT/2；
Wherein T is Transmitting Indicating the transmission time of the data packet, RTT indicating the round trip delay of data transmission between the network device and the other device, T Currently, the method is that Representing the current timestamp.
In an exemplary embodiment, acquiring the time stamp information may further include:
updating and recording the round trip delay before calculating the sending time of the data packet according to the recorded round trip delay for transmitting data between the network device and the other devices and the obtained current time stamp;
the updating and recording the round trip delay comprises the following steps:
acquiring the time difference between sending data and receiving response data of the data by the network equipment;
updating the round trip delay according to RTT2 = p t+ (1-p) RTT 1;
wherein p is a constant and 0<p is less than or equal to 1; t represents the time difference between sending data and receiving response data of the data by the network device, RTT2 represents the round trip delay after updating, and RTT1 represents the round trip delay before updating; RTT1 has an initial value of 0.
In an exemplary embodiment, obtaining a time difference between sending data and receiving response data of the present network device includes:
when data is sent, judging whether handshake data is received after the data is sent, if yes, recording a time stamp for sending the data;
after receiving the handshake data, recording a time stamp for receiving the handshake data;
and determining the time difference according to the time stamp of the sending data and the time stamp of the receiving handshake data.
In an exemplary embodiment, the manner of determining whether handshake data is received after sending data may include:
judging whether the transmission data is transmission control protocol (TCP, transmission Control Protocol) data or not, if so, judging whether a SYN mark and an ACK mark are set in the transmission data, and if so, determining that handshake data can be received after the transmission of the data.
For TCP data, if SYN mark and ACK mark are set in the data, it is indicated that the data transmitting end and the data receiving end need to perform three-way handshake operation; the handshake operation means that the data sending end and the receiving end immediately process the SYN packet, so that the time difference between sending data and receiving response data of the network device can be acquired more accurately, and the accuracy of the acquired RTT is ensured.
In an exemplary embodiment, the tag information may further include: position tag information.
The inventor considers that false information in a metauniverse network easily causes fraudulent conduct in the metauniverse network, and the position reported by a terminal is possibly fraudulent, so that the embodiment of the application writes the position information in a data packet through network equipment, the reliability of the position information source is ensured, and fraudulent conduct caused by the false information is avoided.
In an exemplary embodiment, obtaining location tag information includes:
the network device can obtain the coding of the own position information through (Dynamic Host Configuration Protocol, DHCP) protocol; the location information may include: any one or more of longitude information, latitude information and altitude information.
In an exemplary embodiment, writing the acquired tag information into the data packet includes:
when the data packet is an IPv6 data packet, writing the acquired label information into a destination extension header of the IPv6 data packet; the destination extension header of the IPv6 packet is in TLV format, as shown in fig. 2, taking writing time stamp information as an example, a predefined value may be set in a Type field (Type), 8 bytes may be set in a Length field (Length), and 32 bits of time stamp information may be filled in a value field (i.e., variable Length data field Variable Length data in the figure), such as 32 bits of second transmission time stamp and 32 bits of nanosecond transmission time stamp;
when the data packet is a SRv data packet, writing the acquired tag information into an extension header of the SRv data packet; for SRv data packets, taking writing time stamp information as an example, the time stamp information may be recorded in the last Optional Type Length Value field of the extension header SRH; when specific service control is performed by using SRv, corresponding information can be inserted in the Segment List; in the process of constructing SRH by a source node, a Optional Type Length Value field is inserted at last, the Type is set to be a Type value corresponding to the required information, and the initial value of length is 0; when the network device receives the SRv data packet, the actual time stamp information, such as a 32-bit second time stamp and a 32-bit nanosecond time stamp, is supplemented in Variable length data, as shown in fig. 3;
and when the data packet is an IPv4 data packet, writing the acquired tag information into an option field of the IPv4 data packet. The IPv4 option is also in TLV format, taking writing time stamp information as an example, a predefined value may be set in the type field, 8 bytes may be set in the length field, and 32 bits of time stamp information may be filled in the value field, such as 32 bits of second transmission time stamp and 32 bits of nanosecond transmission time stamp.
The manner in which the position-tag information is written to the data packet is similar to the manner in which the time-tag information is written to the data packet and will not be described again here.
The embodiment of the application also provides a data transmission method applied to the network device, as shown in fig. 4, the method includes:
step S401 receives data packets from other devices except the present network device;
the tag information includes: time tag information;
step S402 judges whether the data packet needs to be labeled according to a preset criterion, if so, step S403 is executed; if not, directly executing step S405;
step S403, acquiring label information;
the tag information can be time tag information or time tag information and position tag information;
step S404, writing the acquired label information into the data packet;
step S405 performs a forwarding operation on the data packet.
In the embodiment of the application, the network equipment judges whether the received data packet is labeled or not, and the label information is written into the data packet only when the received data packet is required to be labeled, so that the flexibility of the network equipment in processing the data packet is improved.
In an exemplary embodiment, the preset criteria may include:
labeling all data packets to be forwarded; or (b)
Labeling the data packet which is to be forwarded and has the length smaller than the preset threshold value, and through the preset threshold value, the length of the labeled data packet can be prevented from exceeding the limit length of the data packet; or (b)
Tagging a data packet which is to be forwarded and carries a preset field, wherein the data packet is a data packet with a TSTAMP option, and the TSTAMP option is used for recording the time of sending data by a sender; the data packet carrying the TSTAMP options is driven into the time tag information, so that the data receiver can evaluate the time synchronization condition of the sender according to the time recorded by the TSTAMP options and the time recorded by the time tag information conveniently, if the time recorded by the TSTAMP options and the time recorded by the time tag information are the same, the sender is indicated to realize the time synchronization, and if the time recorded by the TSTAMP options and the time recorded by the time tag information are different, the sender is indicated to not realize the time synchronization.
The data transmission method described in the above embodiments of the present application will be described below with a specific application example. The network architecture involved in this application example is shown in fig. 5.
Step one, after receiving a data packet with a target address of a sensor A, the network equipment checks whether the data packet is a TCP data packet, if so, checks whether the data packet is provided with a SYN mark and an ACK mark, and if so, executes step two; if not, directly executing the third step;
step two, the destination address of the data packet, namely the address of the sensor A, the destination port, namely the port of the sensor A, and the acquired current timestamp T Currently, the method is that The method comprises the steps of (1) storing the address of the sensor A in a state list of the network equipment, and setting a measurement mark corresponding to a port of the sensor A as 1 in the state list;
step three, the data packet is sent to a sensor A;
step four, the network equipment receives a data packet from the sensor A, searches a state list according to the source address of the data packet, namely the address of the sensor A, and if the measurement mark corresponding to the address of the sensor A is 1, executes a step five; if the measurement mark corresponding to the address of the sensor A is 0, executing a step nine;
fifthly, finding out the corresponding time stamp T1 from the state list according to the source address and the source port of the received data packet, and obtaining the current time stamp T according to the obtained current time stamp Currently, the method is that Calculating a time difference T between sending the data packet and receiving response data of the data packet by the network device, wherein t=t2-T1;
step six, updating and recording round trip delay according to RTT2=p+t+ (1-p) RTT1, and setting the address of the sensor A and the measurement mark corresponding to the port of the sensor A as 0;
p is a constant and 0<p is less than or equal to 1; RTT2 represents the round trip delay after update, and RTT1 represents the round trip delay before update; RTT1 initial value is 0;
step seven, according to T Transmitting -T2-RTT/2 estimating a transmission time of the received data packet;
step eight, the T is carried out Transmitting Writing a data packet;
and step nine, forwarding the data packet to a network server.
Embodiments of the present application also provide a computer readable storage medium storing one or more programs executable by one or more processors to implement the method of any of the previous embodiments.
The embodiment of the present application further provides a network device, as shown in fig. 6, where the network device includes a memory 601 and a processor 602, where the memory 601 stores a program, and the program implements the method described in any of the previous embodiments when the program is read and executed by the processor.
Those of ordinary skill in the art will appreciate that all or some of the steps, systems, functional modules/units in the apparatus, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between the functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed cooperatively by several physical components. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as known to those skilled in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by a computer. Furthermore, as is well known to those of ordinary skill in the art, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media.
Claims (11)
1. A data transmission method applied to a network device, the method comprising:
after receiving data packets from other devices except the network device, acquiring tag information; the tag information includes: the sending time of the data packet;
writing the acquired tag information into the data packet;
and forwarding the data packet carrying the label information.
2. The method of claim 1, wherein the step of determining the position of the substrate comprises,
the acquiring tag information includes:
and calculating the sending time of the data packet according to the recorded round trip time delay for transmitting data between the network equipment and the other equipment and the acquired current time stamp.
3. The method of claim 2, wherein the step of determining the position of the substrate comprises,
based on the recorded round trip delay for transmitting data between the network device and the other devices and the obtained current timestamp T Currently, the method is that Calculating the sending time of the data packet, including:
calculating the sending time of the data packet according to the following formula:
T transmitting ＝T Currently, the method is that -RTT/2；
Wherein T is Transmitting Indicating the transmission time of the data packet, and RTT indicating that the network is in the home networkRound trip delay for transmitting data between the network device and the other device.
4. The method of claim 3, wherein the step of,
the acquiring tag information further includes:
based on the recorded round trip delay for transmitting data between the network device and the other devices and the obtained current timestamp T Currently, the method is that Before calculating the sending time of the data packet, updating and recording the round trip time delay;
the updating and recording the round trip delay comprises the following steps:
acquiring the time difference between sending data and receiving response data of the data by the network equipment;
updating the round trip delay according to RTT2 = p t+ (1-p) RTT 1;
wherein p is a constant and 0< p <1; t represents a time difference between transmitting data and receiving response data of the data by the network device, RTT2 represents a round trip delay after updating, and RTT1 represents a round trip delay before updating.
5. The method of claim 4, wherein the step of determining the position of the first electrode is performed,
the method for obtaining the time difference between sending data and receiving response data of the network equipment comprises the following steps:
when data is sent, judging whether handshake data is received after the data is sent, if yes, recording a time stamp for sending the data;
after receiving the handshake data, recording a time stamp for receiving the handshake data;
and determining the time difference according to the time stamp of the sending data and the time stamp of the receiving handshake data.
6. The method of claim 1, wherein the step of determining the position of the substrate comprises,
the tag information further includes: position tag information.
7. The method according to claim 1 or 6, characterized in that the method further comprises:
after receiving data packets from other devices except the network, judging whether the data packets need to be labeled according to a preset criterion before acquiring label information, and acquiring the label information if the data packets need to be labeled.
8. The method of claim 7, wherein the step of determining the position of the probe is performed,
the preset criteria include:
labeling all data packets to be forwarded; or (b)
Labeling the data packet which is to be forwarded and has the length smaller than a preset threshold value; or (b)
And labeling the data packet which is to be forwarded and carries the preset field.
9. The method of claim 1, wherein the step of determining the position of the substrate comprises,
writing the acquired tag information into the data packet, including:
when the data packet is an IPv6 data packet, writing the acquired label information into a destination extension header of the IPv6 data packet;
when the data packet is a SRv data packet, writing the acquired tag information into an extension header of the SRv data packet;
and when the data packet is an IPv4 data packet, writing the acquired tag information into an option field of the IPv4 data packet.
10. A computer readable storage medium storing one or more programs executable by one or more processors to implement the method of any of claims 1-9.
11. A network device comprising a memory and a processor, the memory storing a program which, when read for execution by the processor, implements the method of any of claims 1 to 9.
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