CN115714991A - Method, apparatus and storage medium for transmitting time-resolved network packets - Google Patents

Abstract

The application discloses a time-transparent network data packet transmission method, equipment and a storage medium. The method comprises the following steps: determining a corresponding broken packet serial number according to the generation sequence of the TAN broken packets of the TAN data packets; sending a TAN broken packet, wherein the head of the TAN broken packet carries a broken packet serial number; the broken packet sequence number occupies at least two bits and is used for uniquely indicating the broken packet sequence of the corresponding TAN broken packet; the TAN packet interruption is a data packet generated after being interrupted based on a preemptive transmission mechanism in the process of sending the TAN data packet. The packet-breaking sequence number of the TAN packet-breaking at least occupies two bits and is used for uniquely indicating the packet-breaking sequence of the corresponding TAN packet-breaking, so that the absolute packet-breaking sequence of the TAN packet-breaking can be determined based on the head of the TAN packet-breaking, the disorder problem of the TAN packet-breaking in the wireless transmission environment can be effectively avoided, and the transmission performance of the TAN data packet in the wireless transmission environment is improved.

Description

Time-clear network packet transmission method, device and storage medium

technical field

The present application relates to the communication field, and in particular to a transmission method, device and storage medium of time-clear network data packets.

Background technique

In the related technology, TAN (Time Aware Network, Time Clear Network) broken packet transmission is based on the broken packet serial number 0—>1—>0—>1—>0…to judge the broken packet PDU (Protocol Data Unit, protocol data unit) sequence during reassembly, and then reassemble the received broken packet PDU. Most of the existing TANs are wired transmission, and the broken packets and reassembly are sent sequentially on the adjacent TAN switch; however, in the wireless transmission environment, if the broken packet PDU is out of order or lost during transmission, the broken packet PDU will be reassembled When the CRC (Cyclic Redundancy Check, Cyclic Redundancy Check) fails, and the device responsible for the reassembly of the broken packet PDU cannot determine the reason for the failure (out of order, packet loss, bit error or uncompleted transmission of the broken packet), resulting in data reassembly Failure or reorganization errors affect TAN business applications.

Contents of the invention

In view of this, the embodiments of the present application provide a time-aware network data packet transmission method, device, and storage medium, aiming at improving the transmission performance of TAN data packets in a wireless transmission environment.

The technical scheme of the embodiment of the application is realized in this way:

In the first aspect, the embodiment of the present application provides a time-clear network data packet transmission method, which is applied to a TAN switching device, and the method includes:

Determining the corresponding broken packet sequence number of the TAN broken packet of the TAN data packet based on the generation order;

Sending the TAN broken packet, the header of the TAN broken packet carries the sequence number of the broken packet;

Wherein, the packet disconnection sequence number occupies at least two bits, and is used to uniquely indicate the packet disconnection sequence of the corresponding TAN packet disconnection; The resulting packet after truncating.

In the above solution, the serial number of the broken packet also has a dynamic indication method that uses one bit to dynamically indicate the broken packet order of the corresponding TAN broken packet; the header of the TAN broken packet also carries a The sequence number is identified by a dynamic indication or a unique indication of the broken packet sequence bit.

In the above solution, the fragmented packet sequence bit identifier and/or at least part of the fragmented packet sequence number occupy a reserved field in the header of the TAN fragmented packet.

In the above scheme, the method also includes:

Receiving a plurality of TAN broken packets corresponding to the same TAN data packet, the header of each TAN broken packet carries the sequence number of the broken packet;

Determining the recombination order of each of the TAN broken packets based on the broken packet sequence number of each of the TAN broken packets;

The TAN packets are restored based on the reassembly order.

In the second aspect, the embodiment of the present application provides a time-clear network data packet transmission method, which is applied to a network element of a wireless network, and the method includes:

Receiving multiple TAN broken packets corresponding to the same TAN data packet sent by the TAN switching device, the header of each TAN broken packet carries a broken packet sequence number;

Encapsulating the received TAN broken packet into an IP (Internet Protocol, Internet Protocol) message and determining the header field of the IP message according to the header of the TAN broken packet;

Send the IP packet;

Wherein, the packet fragmentation sequence number uses one bit to dynamically indicate the packet fragmentation sequence of the corresponding TAN packet fragmentation, and the header field field of the IP message can indicate the packet fragmentation sequence of the corresponding TAN packet fragmentation.

In the above scheme, the determination of the header field of the IP message according to the header of the TAN broken packet includes:

Determine the identifier of the IP message according to the TAN data frame identifier of the TAN broken packet;

Determine the sign of the IP message according to the sequence number of the broken packet of the TAN broken packet;

Determine the fragment offset of the IP packet according to the length of the TAN fragment.

In the above scheme, the method also includes:

Receive a plurality of IP messages corresponding to the same TAN data packet, wherein, the header field field of the IP message corresponding to the TAN broken packet of the TAN data packet is determined according to the broken packet sequence number of the TAN broken packet;

Determining the reassembly sequence of each of the TAN packet breaks based on the header fields of each of the IP packets;

restoring the TAN packets based on the reassembly sequence;

Send the TAN data packet to the TAN switching device.

In a third aspect, the embodiment of the present application provides a time-clear network data packet transmission method, which is applied to a TAN switching device, and the method includes:

In the wireless transmission mode, the transmission of TAN data packets based on the preemptive transmission mechanism is terminated.

In the above solution, the termination is based on the preemptive transmission mechanism to transmit the TAN data packet, including:

If the ingress of the TAN switching device receives the first TAN data packet and the outlet of the TAN switching device is transmitting the second TAN data packet, then interrupt the transmission of the second TAN data packet, and send the first TAN first data packet and retransmit the complete second TAN data packet after sending the first TAN data packet.

In the above scheme, the method also includes:

Based on the local policy configuration or the policy configuration sent by the TAN system, in the wireless transmission mode, the transmission of the TAN data packet based on the preemptive transmission mechanism is terminated.

In a fourth aspect, the embodiment of the present application provides a time-clear network data packet transmission device, which is applied to a TAN switching device, and the transmission device includes:

A determination module, configured to determine the corresponding sequence number of the TAN break packet of the TAN data packet based on the order of generation;

A sending module, configured to send the TAN broken packet, the header of the TAN broken packet carries the sequence number of the broken packet;

Wherein, the packet disconnection sequence number occupies at least two bits, and is used to uniquely indicate the packet disconnection sequence of the corresponding TAN packet disconnection; The resulting packet after truncating.

In the fifth aspect, the embodiment of the present application provides a time-clear network data packet transmission device, which is applied to a network element of a wireless network, and the transmission device includes:

The receiving module is used to receive a plurality of TAN broken packets corresponding to the same TAN data packet sent by the TAN switching device, and the header of each TAN broken packet carries a broken packet sequence number;

A determining module, configured to encapsulate the received TAN broken packet into an IP message and determine the header field of the IP message according to the header of the TAN broken packet;

A sending module, configured to send the IP packet;

Wherein, the packet fragmentation sequence number uses one bit to dynamically indicate the packet fragmentation sequence of the corresponding TAN packet fragmentation, and the header field field of the IP message can indicate the packet fragmentation sequence of the corresponding TAN packet fragmentation.

In a sixth aspect, the embodiment of the present application provides a time-clear network data packet transmission device, which is applied to a TAN switching device, and the transmission device includes:

The control module is configured to terminate the transmission of the TAN data packet based on the preemptive transmission mechanism in the wireless transmission mode.

In a seventh aspect, the embodiment of the present application provides a TAN switching device, including: a processor and a memory for storing a computer program that can run on the processor, wherein, when the processor is used to run the computer program, Execute the steps of the method described in the first aspect or the third aspect of the embodiments of the present application.

In an eighth aspect, the embodiment of the present application provides a network device, including: a processor and a memory for storing a computer program that can run on the processor, wherein the processor, when running the computer program, executes The steps of the method described in the second aspect of the embodiments of the present application.

In the ninth aspect, the embodiment of the present application provides a storage medium, on which a computer program is stored, and when the computer program is executed by a processor, any one of the first to third aspects of the embodiment of the present application can be realized. method steps.

In the technical solution provided by the embodiment of the present application, the serial number of the TAN broken packet occupies at least two bits, which is used to uniquely indicate the sequence of the corresponding TAN broken packet, so that the TAN broken packet can be determined based on the header of the TAN broken packet The absolute order of packet disconnection can effectively avoid the out-of-order problem of TAN packet disconnection in the wireless transmission environment, thereby improving the transmission performance of TAN data packets in the wireless transmission environment.

In the technical solution provided by the embodiment of the present application, the network element of the wireless network encapsulates the received TAN broken packet into an IP message and determines the header field of the IP message according to the header of the TAN broken packet, and then sends the IP message, The network element receiving the IP message can determine the reassembly order of each TAN packet based on the header field field of the IP message, and then restore the TAN data packet based on the reassembly order, and send the restored TAN data packet to the TAN switching device, It can effectively avoid the out-of-sequence problem of TAN packet disconnection in the wireless transmission environment, thereby improving the transmission performance of the TAN data packet in the wireless transmission environment.

The technical solution provided by the embodiment of this application can configure the strategy of the TAN switching device. In the wireless transmission mode, the transmission of TAN data packets based on the preemptive transmission mechanism can be terminated, and the disorder problem of TAN packet disconnection in the wireless transmission environment can also be effectively avoided. , thereby improving the transmission performance of the TAN data packet in a wireless transmission environment.

Description of drawings

FIG. 1 is a schematic structural diagram of a TAN PDU in the related art;

FIG. 2 is a schematic flow diagram of a method for transmitting TAN data packets according to an embodiment of the present application;

FIG. 3 is a schematic structural diagram of a TAN PDU in an application example of the present application;

FIG. 4 is a schematic structural diagram of a TAN PDU in another application example of the present application;

FIG. 5 is a schematic structural diagram of a TAN PDU in another application example of the present application;

FIG. 6 is a schematic structural diagram of a TAN PDU in another application example of the present application;

FIG. 7 is a schematic flow diagram of a method for transmitting TAN data packets according to another embodiment of the present application;

FIG. 8 is a schematic diagram of the principle of IP packet encapsulation of TAN data packets in an application example of the present application;

FIG. 9 is a schematic diagram of the transmission process of a TAN broken packet in a 5G network in an application example of the present application;

FIG. 10 is a schematic flow diagram of a method for transmitting a TAN data packet in another embodiment of the present application;

FIG. 11 is a schematic diagram of the principle of the configuration issued by the TAN system control unit in an application example of the present application;

12 is a schematic structural diagram of a device for transmitting time-clear network data packets according to an embodiment of the present application;

FIG. 13 is a schematic structural diagram of a device for transmitting time-clear network data packets according to another embodiment of the present application;

FIG. 14 is a schematic structural diagram of a device for transmitting time-clear network data packets according to another embodiment of the present application;

FIG. 15 is a schematic structural diagram of a TAN switching device according to an embodiment of the present application;

FIG. 16 is a schematic structural diagram of a network device according to an embodiment of the present application.

Detailed ways

The application will be further described in detail below in conjunction with the accompanying drawings and embodiments.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terms used herein in the specification of the application are only for the purpose of describing specific embodiments, and are not intended to limit the application.

Before the embodiment of the present application is described in further detail, the nouns and terms involved in the embodiments of the present application are described, and the nouns and terms involved in the embodiments of the present application are applicable to the following explanations:

In related technologies, TAN data packet is a new data packet based on time-based industrial communication technology. It introduces clock synchronization technology into the TAN system and encapsulates the TAN frame header before the standard Ethernet frame header field. , source switch, data priority, data serial number, and various time stamps of the data to process the data. Because TAN technology encapsulates standard Ethernet frames, it has relatively good compatibility with various industrial protocols used in current industrial networks. Based on the observability of TAN data packets, that is, the network can know the data source, data purpose, data content, and data time. TAN technology is used in many fields of the industrial Internet, such as synchronous transmission of control commands, data redundancy backup, and data monitoring. and other scenarios have been better applied.

Exemplarily, the TAN PDU is shown in Figure 1. The TAN PDU consists of a TAN header and a standard GB/T15629.3 PDU. The TAN header consists of the source TAN switching device ID, the destination TAN switching device ID, reservation, path information, data Frame type, reservation, data frame ID, TAN PDU length, broken packet identification, broken packet sequence number, switching device hop count, time information, static checksum, and dynamic checksum. Among them, the TAN header has a total of 16 bytes.

In a TAN domain, on the basis of traditional priorities, a dual-channel transmission mechanism can be added: fast channel and standard channel, corresponding to fast data frames and standard data frames respectively. The TAN PDU can be distinguished by the identification of the data frame type field, and then the data types of two different channels are mixed and transmitted. The TAN switching device performs differentiated transmission of the data types of different channels. For example, a data frame type of 01 indicates that the data frame is a fast data frame transmitted in the fast channel of TAN, and a data frame type of 10 indicates that the data frame is a standard data frame transmitted in the standard channel of TAN. Fast data frames transmitted in the fast channel have a higher priority than standard data frames transmitted in the standard channel.

The TAN PDU transmitted on the standard channel has two formats, one is the untruncated data frame (corresponding to the standard PDU, the data frame type is 10, and the broken packet identification field is 0), and the other is the truncated data frame (corresponding to the broken packet PDU, the data frame type is 10, the broken packet identification field is 1, and the broken packet sequence number is 0 or 1).

When the fast PDU (that is, the fast data frame) enters a TAN switching device, if there is no standard data transmission at the exit, the fast PDU is normally transmitted. If the egress is transmitting a standard PDU (that is, a standard data frame), the TAN switching device performs a preemptive action, truncates the standard PDU, and then transmits the fast PDU.

When a TAN switching device sends a fast PDU, the outlet is transmitting a standard PDU and the sent data length (number of bytes) of this standard PDU is greater than or equal to the set data length (number of bytes) specified in GB/T 15629.3, then execute preemptive action. The preempted standard PDU will be truncated, and the remaining data will be repackaged according to the broken packet PDU. When the packet-breaking PDU is transmitted, it can still be truncated by the fast PDU, and the remaining data is still encapsulated according to the packet-breaking PDU, until all transmissions of this standard PDU are completed, and the number of preemption is unlimited. In the TAN switching device at the receiving end, the data is reassembled according to the identifier of the broken packet PDU, and restored to a standard PDU.

Since the standard PDU may be truncated multiple times during transmission, multiple broken PDUs are formed. The TAN switching device at the receiving end reassembles and restores the standard PDU data according to the TAN header of the standard PDU and the identifier of the broken PDU:

When the standard PDU is truncated for the first time, the standard data PDU frame is divided into two parts, one part is the part that has been transmitted, and the other part is the repackaged broken packet PDU, the broken packet flag in the broken packet PDU is set to 1, and the broken packet The serial number is set to 1 (the value of this position in the source TAN header is reversed);

After the transmission of the fast PDU is completed, the packet-broken PDU resumes transmission. If a new fast PDU enters the TAN switching device or module at this time, continue the preemption action according to the preemption process. The broken packet PDU is truncated into a new broken packet PDU. The broken packet PDU frame is divided into two parts, one part is the part that has been transmitted, and the other part is the repackaged broken packet PDU. The value of this position is negated);

The TAN switching device at the receiving end can determine which broken packet PDUs belong to the same standard PDU according to the TAN header, for example, can determine the PDUs belonging to the same standard PDU according to the data frame ID. According to the broken packet sequence number 0—>1—>0—>1—>0…… judge the sequence of the broken packet PDU recombination, receive the broken packet PDU for reassembly, and calculate the CRC value of the reassembled PDU (assumed Use CRC(calculation) to represent the value after CRC calculation). Whether the recombination is completed is judged by the numerical value of CRC (calculation). The CRC (calculation) of the actual data is compared with the CRC in the broken packet PDU. If it is not the same, continue to wait for the next broken packet PDU, and use the calculated CRC (calculation) as the starting value of the next CRC (calculation) , until the reassembled data CRC (calculation) is equal to the CRC carried by the broken packet PDU, the standard PDU reassembly is completed). Exemplarily, the CRC comparison process is shown in Table 1.

Table 1

However, in a wireless transmission environment, if out-of-sequence or packet loss occurs during transmission of a broken packet PDU, the CRC will not pass when the broken packet, bit error, or broken packet), resulting in data reassembly failure or reassembly error, affecting TAN business applications.

Based on this, in various embodiments of the present application, a transmission method of a TAN data packet is provided, which can effectively avoid the out-of-order problem of the TAN break packet of the TAN data packet in a wireless transmission environment, and then improve the transmission of the TAN data packet in the wireless transmission environment. Transmission performance in a transmission environment.

As shown in Figure 2, the embodiment of the present application provides a transmission method of a time-clear network data packet, which is applied to a TAN switching device, and the method includes:

Step 201, determine the corresponding sequence number of the TAN break packet of the TAN data packet based on the generation order;

Step 202, sending the TAN broken packet, the header of the TAN broken packet carries the broken packet sequence number; wherein, the broken packet sequence number occupies at least two bits, and is used to uniquely indicate the corresponding TAN broken packet Packet breaking sequence; the TAN breaking packet is a data packet generated after being truncated based on a preemptive transmission mechanism during the process of sending a TAN data packet.

Here, the preemptive transmission mechanism can be understood as the aforementioned differentiated transmission based on the data frame type of the TAN data packet, for example, the TAN data packet with the data frame type 01 as the fast data frame, and the TAN data packet with the As a standard data frame, the priority of the fast data frame is higher than that of the standard data frame. When transmitting the fast data frame, if the TAN switching device is using the standard data frame, the standard data frame can be truncated and will be intercepted. The remaining data is re-encapsulated according to the broken packet PDU to generate a TAN broken packet. It can be understood that the TAN break packet can be truncated again by the fast data frame that needs to be transmitted during the transmission process, and the remaining data that is intercepted can generate a new TAN break packet again. In this way, a standard data frame has two Or the situation where more than two TAN packets are broken. If TAN packets are out of sequence in the wireless transmission environment, it may lead to data reassembly failure or reassembly errors, affecting TAN business applications.

In the embodiment of the present application, since the broken packet sequence number of the TAN broken packet occupies at least two bits, it is used to uniquely indicate the broken packet sequence of the corresponding TAN broken packet, so that the absolute number of the TAN broken packet can be determined based on the header of the TAN broken packet. The sequence of packet breaks can effectively avoid the out-of-order problem of TAN packet breaks in the wireless transmission environment, thereby improving the transmission performance of TAN data packets in the wireless transmission environment.

It should be noted that the number of bits of the broken packet sequence number can be set according to the application scenario. For example, in actual use, if the maximum number of broken packets in the actual scenario is 4, you can use 2 bits (bits) To identify the broken packet sequence number field of the TAN header, for example, 00, 01, 10, and 11 are used to respectively represent the sequentially generated TAN broken packets.

In an application example, the bit extension of the serial number of the broken packet in the TAN header is shown in FIG. 3 . Exemplarily, the number n of the serial number of the interrupted packet in the TAN header is 6 bits, and the TAN interrupted packet is judged according to the serial number of the interrupted packet 000000—>000001—>000010—>000011. The sequence of the received broken packet PDU is reassembled. It should be noted that since the Ethernet frame data field has a minimum of 46 bytes and a maximum of 1500 bytes, the 6-bit disconnected packet sequence number can fully meet the sequence requirements for generating the largest number of disconnected packets of the largest Ethernet frame data packet.

Exemplarily, the serial number of the broken packet also has a dynamic indication method using one bit to dynamically indicate the broken packet order of the corresponding TAN broken packet; the header of the TAN broken packet also carries a The sequence number is identified by a dynamic indication or a unique indication of the broken packet sequence bit.

It can be understood that the TAN header of the TAN data packet can retain the dynamic indication method based on one bit to dynamically indicate the order of packet fragmentation, so that it can be compatible with the method of reassembling fragmented packet PDUs based on the sequence number of fragmented packets of one bit.

Exemplarily, the fragmented packet sequence bit identifier and/or at least part of the fragmented packet sequence number occupy a reserved field of the header of the TAN fragmented packet. In this way, the reserved fields of the TAN header can be fully utilized to reduce the overhead of additional TAN headers.

In an application example, the format of the TAN PDU is shown in FIG. 4 . By adding the packet disconnection sequence bit identification field in the TAN header, it is indicated whether the subsequent field of the packet disconnection sequence bit identification field is a packet disconnection sequence number of 1 bit or a packet disconnection sequence number of more than 1 bit. For example, when the broken packet sequence bit identification field is 0, it indicates that the broken packet sequence number is 1 bit, and the TAN packet broken is judged according to the broken packet sequence number 0—>1—>0—>1—>0... The sequence when the broken packet PDU is reassembled, and the broken packet PDU is received and reassembled. For example, when the packet disconnection sequence bit identification field is 1, for example, 6 bits are used to identify the packet disconnection sequence, and the packet disconnection sequence number is 6 bits, and the TAN packet disconnection is based on the packet disconnection sequence number 000000—>000001—>000010—>000011.. ....Judging the sequence when the broken packet PDU is reassembled, and recombining after receiving the broken packet PDU.

It can be understood that, compared with the manner shown in FIG. 3 , the method shown in FIG. 4 is compatible with the 1-bit broken packet sequence number field identifier and the multi-bit broken packet sequence number field identifier.

In an application example, the format of the TAN PDU is shown in FIG. 5 . It can be understood that, on the basis of Figure 4, the broken packet sequence bit identification field can be replaced by a reserved field, indicating whether the broken packet sequence number field is a broken packet sequence number of 1 bit or a broken packet sequence number of more than 1 bit . For example, when the reserved field is 0, the serial number of the identified broken packet is 1 bit, and the TAN broken packet is judged according to the broken packet serial number 0—>1—>0—>1—>0…… Sequence during reassembly, receive broken packet PDU for reassembly. If the reserved field is 1, for example, 6 bits are used to identify the disconnection sequence, and the identification sequence number of the disconnection is 6 bits, and the TAN packet disconnection is based on the disconnection sequence number 000000—>000001—>000010—>000011..... .Judging the sequence when the broken packet PDU is reassembled, and recombining after receiving the broken packet PDU. Compared with the method shown in FIG. 4 , the existing reserved field can be used, and there is no need to add an additional packet break sequence bit identification field, thereby saving the overhead of the TAN header.

In an application example, the format of the TAN PDU is shown in FIG. 6 . Use the first reserved field as the broken packet sequence bit identification field to indicate whether the broken packet sequence number field is a broken packet sequence number of 1 bit or a broken packet sequence number of more than 1 bit. For example, when the first reserved field is 0, it indicates that the sequence number of the broken packet is 1 bit, and the TAN packet is broken according to the sequence number of the broken packet 0—>1—>0—>1—>0…… The sequence when the broken packet PDU is reassembled, and the broken packet PDU is received and reassembled. If the first reserved field is 1, it indicates that the broken packet sequence number field is a broken packet sequence number with more than 1 bit, and use the second reserved field to identify the broken packet sequence number, for example, 6 bits to identify the broken packet sequence, The serial number of the broken packet is 6 bits. The TAN broken packet is based on the broken packet serial number 000000—>000001—>000010—>000011... to determine the sequence when the broken packet PDU is reassembled, and the broken packet PDU is received. reorganize. Compared with the method shown in FIG. 5 , the existing reserved fields can be further fully utilized without changing the field size of the TAN header, that is, without adding additional fields in the TAN header.

Exemplarily, when the TAN switching device receives the TAN data packet, the method further includes:

Receiving a plurality of TAN broken packets corresponding to the same TAN data packet, the header of each TAN broken packet carries the sequence number of the broken packet;

Determining the recombination order of each of the TAN broken packets based on the broken packet sequence number of each of the TAN broken packets;

The TAN packets are restored based on the reassembly order.

It can be understood that, since the broken packet sequence number in the embodiment of the present application occupies at least two bits, it can uniquely indicate the broken packet sequence of the corresponding TAN broken packet, so that the absolute broken packet of the TAN broken packet can be determined based on the header of the TAN broken packet. Packet sequence, taking the 6-digit broken packet sequence number as an example, you can judge the sequence when the broken packet PDU is reassembled according to the broken packet sequence number 000000—>000001—>000010—>000011, and the received broken packet PDUs are reassembled. Therefore, the out-of-sequence problem of the TAN packet disconnection in the wireless transmission environment can be effectively avoided, thereby improving the transmission performance of the TAN data packet in the wireless transmission environment.

In some embodiments, the TAN data packet is transmitted between the TAN switching device at the sending end and the TAN switching device at the receiving end via a wireless network. The egress network element of the network sends it to the TAN switching device at the receiving end.

Based on this, an embodiment of the present application provides a time-clear network data packet transmission method, which is applied to a network element of a wireless network. As shown in FIG. 7, the method includes:

Step 701: Receive multiple TAN broken packets corresponding to the same TAN data packet sent by the TAN switching device, and the header of each TAN broken packet carries a broken packet sequence number.

Step 702: Encapsulate the received TAN broken packet into an IP message and determine the header field of the IP message according to the header of the TAN broken packet.

Step 703, sending the IP message; wherein, the packet breaking sequence number uses one bit to dynamically indicate the packet breaking order of the corresponding TAN packet breaking, and the header field field of the IP message can indicate the corresponding Packet disconnection sequence of TAN packet disconnection.

Exemplarily, the ingress network element receives the TAN data packet sent by the TAN switching device at the sending end, and the TAN switching device at the sending end can transmit the broken packet PDU based on the aforementioned preemptive transmission mechanism, and the broken packet PDU can use a dynamic indication method, that is, a The bits dynamically indicate the packet breaking order of the corresponding TAN packet breaking. In this way, the improvement of the encoding method of the header of the TAN data packet can be omitted.

It can be understood that the ingress network element encapsulates the received TAN broken packet into an IP message and determines the header field field of the IP message according to the header of the TAN broken packet, specifically, according to the broken packet sequence The packet fragmentation sequence of the determined TAN packet fragmentation determines the IP header field field of the encapsulated IP message, so that the IP header field field can indicate the packet fragmentation sequence of the corresponding TAN packet fragmentation. Then, the ingress network element sends the IP message to the egress network element, and the egress network element can restore the recombination sequence of each TAN broken packet based on the reorganization sequence determined based on the IP header field field of the received IP message. TAN data packet, and send the restored TAN data packet to the TAN switching device at the receiving end. It can effectively avoid the out-of-sequence problem of TAN packet disconnection in the wireless transmission environment, thereby improving the transmission performance of the TAN data packet in the wireless transmission environment.

Exemplarily, the determining the header field field of the IP message according to the header of the TAN broken packet includes:

Determine the identifier of the IP message according to the TAN data frame identifier of the TAN broken packet;

Determine the sign of the IP message according to the sequence number of the broken packet of the TAN broken packet;

Determine the fragment offset of the IP packet according to the length of the TAN fragment.

In an application example, the schematic diagram of the principle of performing IP packet encapsulation on the TAN data packet is shown in FIG. 8 .

The following describes the fields of the IP header:

Version: the version of the IP protocol. For example, the version number of the IP protocol can be 4, and the version number of the next-generation IP protocol is 6.

Header Length: The length of the IP header. The sum of the length of the fixed part (20 bytes) and the length of the variable part. A total of 4 places. The maximum is 1111, that is, 15 in decimal, which means that the maximum length of the IP header can be 15 32bits (4 bytes), that is, the longest can be 15*4=60 bytes, except for the fixed part length of 20 bytes , the length of the variable part is at most 40 bytes.

Service Type: Type Of Service.

Total Length in Bits: The total length of the IP packet. The sum of the length of the header and the length of the data part.

Identification: uniquely identifies each datagram sent. Usually every time a message is sent, its value is incremented by one. When the IP packet length exceeds the MTU (Maximum Transmission Unit) of the transmission network, it must be fragmented. The value of this identification field is copied to the identification field of all data fragments, so that these fragments can be identified according to the final destination. The content of the field reconstitutes the original data.

Flag: 3 digits in total, including: R, DF, and MF. Currently only the last two bits are valid, among them, DF bit: 1 means no fragmentation, 0 means fragmentation; MF bit: 1 means "more slices", 0 means this is the last slice.

Fragment Offset: The fragment offset (OFFSET) of an IP packet refers to the offset of this fragment relative to the first bit in the original data packet.

Time to live: the maximum number of routers that IP packets are allowed to pass through. Every time a router passes through, the TTL is decremented by 1. When it is 0, the router discards the datagram. The TTL field is an 8-bit field initially set by the sender. The recommended initial value is specified by the Assignment Number RFC, currently 64. Sending ICMP echo replies often sets the TTL to a maximum of 255.

Protocol: Point out which protocol is used for the data carried by the IP message, so that the IP layer of the destination host can know which process to submit the datagram to (different protocols have different processes). Similar to the port number, for example, the protocol number of TCP is 6, the protocol number of UDP is 17, the protocol number of ICMP is 1, and the protocol number of IGMP is 2.

Header checksum: Calculate the checksum of the IP header and check the integrity of the IP header.

Source IP address: identifies the source device of the IP datagram.

Destination IP address: identifies the destination address of the IP datagram.

Here, the same IP packet identifier can be set for data packets with the same TAN data frame identifier. Exemplarily, when the packet break flag field of the TAN data packet is 0, the DF bit of the flag field of the IP packet is 1. The broken packet identification field is 1, the broken packet serial number field is 1 or 0, and the IP packet flag bit DF is 0. When the device determines that the current data packet is not the last broken packet of the same TAN data through the TAN packet broken CRC check, The MF bit of the IP packet is 1. When the device confirms that the current data packet is the last packet of TAN data through the CRC check of the TAN packet, the MF bit of the IP packet is 0; at the same time, the TAN PDU length can be Determine the offset (OFFSET) field of the IP packet.

Exemplarily, the method further includes:

Receive a plurality of IP messages corresponding to the same TAN data packet, wherein, the header field field of the IP message corresponding to the TAN broken packet of the TAN data packet is determined according to the broken packet sequence number of the TAN broken packet;

Determining the reassembly sequence of each of the TAN packet breaks based on the header fields of each of the IP packets;

restoring the TAN packets based on the reassembly sequence;

Send the TAN data packet to the TAN switching device.

It can be understood that the network elements of the wireless network can receive IP packets sent by other network elements, which can be determined based on the header fields of each IP packet according to the packet sequence number of the TAN packet, and based on the IP The header field field of the message determines the reassembly sequence of each TAN broken packet, and then the TAN broken packets belonging to the same TAN data packet can be reorganized, the TAN data packet is restored, and the restored TAN data packet is sent to the TAN switching device, Thus, the out-of-sequence problem of TAN packet disconnection in the wireless transmission environment is effectively avoided.

In an application example, as shown in Figure 9, taking uplink data transmission as an example, the transmission process of the TAN disconnection packet in the 5G network may include:

Step 901, encapsulating the TAN broken packet data in a scenario where the TAN switching device preempts.

The TAN switching device can encapsulate the TAN broken packet data based on the aforementioned preemptive transmission mechanism, which will not be repeated here.

Step 902, sending TAN packet break data.

The TAN switching device may send TAN packet disconnection data to a 5G user plane functional entity such as UE (User Equipment, user equipment).

Step 903: Receive and identify the TAN packet fragmentation data, determine the header field of the encapsulated IP header according to the TAN header field information, etc., and map the sequence of TAN packet fragmentation into the IP packet.

The UE receives and recognizes the TAN packet disconnection data, and determines the header field of the encapsulated IP packet header according to the TAN header field information, etc., and maps the sequence of the TAN packet disconnection to the IP packet.

Step 904, sending the TAN packet break data.

The UE sends the TAN packet break data encapsulated in the IP message to the UPF (User plane Function, user plane function device) through the 5G network.

Step 905: Identify the broken packet data, store all broken packets received with the same TAN data, and reassemble the TAN broken packets.

UPF identifies broken packet data through IP packets, stores all broken packets that receive the same TAN data, and reassembles TAN broken packets.

Step 906, send TAN data.

The UPF sends the reassembled TAN data packet to the TAN switching device.

It can be understood that, for downlink data, the UPF can receive and identify the TAN broken packet data, and determine the header field of the encapsulated IP header according to the TAN header field information, etc., and map the order of the TAN broken packets to the IP message, And send the TAN broken packet data encapsulated in the IP message to the UE, and the UE identifies the broken packet data based on the IP message, reassembles the TAN broken packet, and sends the reassembled TAN data packet to the TAN switching device.

The embodiment of the present application also provides a method for transmitting time-clear network data packets, which is applied to a TAN switching device, as shown in FIG. 10 , the method includes:

Step 1001, in the wireless transmission mode, terminate the transmission of the TAN data packet based on the preemptive transmission mechanism.

It can be understood that the TAN switching device can terminate the aforementioned behavior of transmitting data based on the preemptive transmission mechanism when it is determined to use the wireless transmission method to transmit the TAN data packet, that is, when the fast PDU enters a TAN switching device, if the exit is transmitting the standard PDU , the TAN switching device will no longer perform the preemption action, that is, it will not generate TAN packet breaks. In this way, it can effectively avoid the out-of-order problem of the TAN packet breakage of the TAN data packet in the wireless transmission environment, thereby improving the TAN data packet in the wireless transmission environment. Under the transmission performance.

Exemplarily, the termination transmits the TAN data packet based on a preemptive transmission mechanism, including:

If the ingress of the TAN switching device receives the first TAN data packet and the outlet of the TAN switching device is transmitting the second TAN data packet, then interrupt the transmission of the second TAN data packet, and send the first TAN first data packet and retransmit the complete second TAN data packet after sending the first TAN data packet.

It can be understood that the priority of the aforementioned first TAN data packet is higher than that of the second TAN data packet. For example, the first TAN data packet corresponds to a fast data frame, and the second TAN data packet corresponds to a standard data frame. TAN exchange In the wireless transmission mode, the device no longer truncates the standard data frame to generate a TAN packet, but interrupts the transmission of the standard data frame, and retransmits the standard data frame after sending the fast data frame. This can also effectively avoid The out-of-sequence problem of the TAN break packet of the TAN data packet in the wireless transmission environment, thereby improving the transmission performance of the TAN data packet in the wireless transmission environment.

Exemplarily, the transmission of the TAN data packet based on the preemptive transmission mechanism may be terminated in the wireless transmission mode based on the local policy configuration or the policy configuration sent by the TAN system. It can be understood that it is necessary to perform local or remote configuration on the TAN switching device in advance, so that the TAN switching device can terminate the aforementioned behavior of transmitting data based on the preemptive transmission mechanism in the wireless transmission mode.

In an application example, as shown in Figure 11, the TAN system control unit issues policies to the TAN switching device at the receiving end and the TAN switching device at the sending end, so that the corresponding TAN switching devices are configured as: the next hop is the TAN for wireless transmission. The data packets are not interrupted. In the preemption scenario, the standard PDU transmission is interrupted, and the complete standard PDU is retransmitted after the fast PDU is transmitted.

It should be noted that the TAN switching device at the receiving end and the TAN switching device at the sending end are relative terms. When a TAN switching device sends a TAN data packet to the opposite TAN switching device, the TAN switching device that sends the TAN data packet is the sending end. The TAN switching device, correspondingly, the TAN switching device at the opposite end is the TAN switching device at the receiving end.

It can be understood that, for the TAN switching device at the sending end, when the fast PDU enters, if the egress is forwarding the standard PDU, the TAN switching device at the sending end does not perform the packet breaking operation of the aforementioned preemptive transmission mechanism, and directly stops the sending of the standard TAN PDU , after the fast PDU is sent, resend the complete standard TAN PDU. The TAN switching device at the receiving end can check the received part of the standard PDU data based on the received complete TAN PDU and then discard the packet.

In order to implement the method of the embodiment of the present application, the embodiment of the present application also provides a transmission device for time-aware network data packets, the transmission device for time-aware network data packets corresponds to the above-mentioned transmission method for time-aware network data packets, the above-mentioned time-aware network data packet transmission method The steps in the embodiment of the network data packet transmission method are also fully applicable to the present time-clear network data packet transmission device embodiment.

In one embodiment, as shown in FIG. 12 , the device for transmitting time-clear network data packets is applied to a TAN switching device, and includes: a determining module 1201 and a sending module 1202 .

The determining module 1201 is used to determine the corresponding broken packet sequence number based on the generation sequence of the TAN broken packet of the TAN data packet; the sending module 1202 is used to send the TAN broken packet, and the header of the TAN broken packet carries the broken packet sequence number; wherein, the broken packet sequence number occupies at least two bits, and is used to uniquely indicate the broken packet sequence of the corresponding TAN broken packet; the TAN broken packet is based on preemptive transmission during the process of sending the TAN data packet The packet generated after the mechanism was truncated.

Exemplarily, the serial number of the broken packet also has a dynamic indication method using one bit to dynamically indicate the broken packet order of the corresponding TAN broken packet; the header of the TAN broken packet also carries a The sequence number is identified by a dynamic indication or a unique indication of the broken packet sequence bit.

Exemplarily, the fragmented packet sequence bit identifier and/or at least part of the fragmented packet sequence number occupy a reserved field of the header of the TAN fragmented packet.

Exemplarily, the device for transmitting time-clear network data packets further includes: a reassembly module 1203, configured to receive multiple TAN broken packets corresponding to the same TAN data packet, and the header of each TAN broken packet carries the sequence number of the broken packet ; Determine the reassembly sequence of each of the TAN fragmented packets based on the fragmented packet sequence number of each of the TAN fragmented packets; restore the TAN data packets based on the reorganized sequence.

In practical application, the determining module 1201, the sending module 1202 and the recombining module 1203 may be implemented by a processor in the device for transmitting time-clear network data packets. Of course, a processor needs to run a computer program in memory to carry out its functions.

In one embodiment, as shown in FIG. 13 , the device for transmitting time-aware network data packets is applied to a network element of a wireless network, and includes: a receiving module 1301 , a determining module 1302 and a sending module 1303 .

The receiving module 1301 is used to receive a plurality of TAN broken packets corresponding to the same TAN data packet sent by the TAN switching device, and the header of each TAN broken packet carries a broken packet sequence number; the determining module 1302 is used to determine the received TAN broken packets Encapsulate the packet into an IP message and determine the header field of the IP message according to the header of the TAN broken package; the sending module 1303 is used to send the IP message; wherein, the broken package sequence number adopts a The bits dynamically indicate the packet disconnection sequence of the corresponding TAN packet disconnection, and the header field of the IP message can indicate the corresponding packet disconnection sequence of the TAN packet disconnection.

Exemplarily, the determining module 1302 is specifically used to:

Determine the identifier of the IP message according to the TAN data frame identifier of the TAN broken packet;

Determine the sign of the IP message according to the sequence number of the broken packet of the TAN broken packet;

Determine the fragment offset of the IP packet according to the length of the TAN fragment.

Exemplarily, the receiving module 1301 is further configured to receive a plurality of IP packets corresponding to the same TAN data packet, wherein, the header field field of the IP packet of the TAN broken packet corresponding to the TAN data packet is based on the TAN broken packet The serial number of broken packets is determined; the transmission device of the time-clear network data packets also includes: a reassembly module 1304, which is used to determine the reorganization sequence of each of the TAN broken packets based on the header fields of each of the IP messages, and based on the Recombining and restoring the TAN data packet; the sending module 1303 is also used to send the TAN data packet to the TAN switching device

In practical applications, the receiving module 1301 , the determining module 1302 , the sending module 1303 and the recombining module 1304 may be implemented by a processor in the device for transmitting time-clear network data packets. Of course, a processor needs to run a computer program in memory to carry out its functions.

In one embodiment, as shown in FIG. 14 , the device for transmitting time-aware network data packets is applied to a TAN switching device, and includes: a control module 1401 . The control module 1401 is configured to terminate the transmission of the TAN data packet based on the preemptive transmission mechanism in the wireless transmission mode.

Exemplarily, the control module 1401 is specifically configured to: if the ingress of the TAN switching device receives the first TAN data packet and the egress of the TAN switching device is transmitting the second TAN data packet, interrupt the second TAN data packet For packet transmission, the first TAN data packet is sent preferentially and the complete second TAN data packet is retransmitted after sending the first TAN data packet.

Exemplarily, the device for transmitting time-clear network data packets further includes: a configuration module 1402, configured to terminate the transmission of TAN data based on the preemptive transmission mechanism in the wireless transmission mode based on the local policy configuration or the policy configuration sent by the TAN system Bag.

In practical applications, the control module 1401 and the configuration module 1402 may be implemented by a processor in a device for transmitting time-clear network data packets. Of course, a processor needs to run a computer program in memory to carry out its functions.

It should be noted that: when the device for transmitting time-clear network data packets provided by the above-mentioned embodiments transmits time-clear network data packets, only the division of the above-mentioned program modules is used for illustration. The above distribution of processing is accomplished by different program modules, that is, the internal structure of the device is divided into different program modules to complete all or part of the processing described above. In addition, the time-aware network data packet transmission device and the time-aware network data packet transmission method embodiment provided by the above embodiment belong to the same concept, and its specific implementation process is detailed in the method embodiment, and will not be repeated here.

Based on the hardware implementation of the above program modules, and in order to implement the method of the embodiment of the present application, the embodiment of the present application further provides a TAN switching device. FIG. 15 only shows an exemplary structure of the TAN switching device but not the entire structure, and part or all of the structure shown in FIG. 15 can be implemented as required.

As shown in FIG. 15 , a TAN switching device 1500 provided in this embodiment of the present application includes: at least one processor 1501 , a memory 1502 , a user interface 1503 and at least one network interface 1504 . Various components in the TAN switching device 1500 are coupled together through the bus system 1505 . It can be understood that the bus system 1505 is used to realize connection and communication between these components. In addition to the data bus, the bus system 1505 also includes a power bus, a control bus and a status signal bus. However, the various buses are labeled as bus system 1505 in FIG. 15 for clarity of illustration.

Wherein, the user interface 1503 may include a display, a keyboard, a mouse, a trackball, a click wheel, keys, buttons, a touch panel or a touch screen, and the like.

The memory 1502 in the embodiment of the present application is used to store various types of data to support the operation of the TAN switching device. Examples of such data include: any computer program for operating on TAN switching equipment.

The time-aware network data packet transmission method disclosed in the embodiment of the present application may be applied to the processor 1501 or implemented by the processor 1501 . The processor 1501 may be an integrated circuit chip with signal processing capability. In the implementation process, each step of the time-clear network data packet transmission method may be completed by an integrated logic circuit of hardware in the processor 1501 or instructions in the form of software. The aforementioned processor 1501 may be a general-purpose processor, a digital signal processor (DSP, Digital Signal Processor), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like. The processor 1501 may implement or execute various methods, steps, and logic block diagrams disclosed in the embodiments of the present application. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module can be located in the storage medium, the storage medium is located in the memory 1502, the processor 1501 reads the information in the memory 1502, and combines with its hardware to complete the steps of the time-clear network data packet transmission method provided by the embodiment of the present application.

In an exemplary embodiment, the TAN switching device may be implemented by one or more Application Specific Integrated Circuits (ASIC, Application Specific Integrated Circuit), DSP, Programmable Logic Device (PLD, ProgrammableLogic Device), Complex Programmable Logic Device (CPLD, Complex Programmable Logic Device), Field Programmable Logic Gate Array (FPGA, Field Programmable Gate Array), general-purpose processor, controller, microcontroller (MCU, Micro Controller Unit), microprocessor (Microprocessor), or other electronic components Implementation for executing the aforementioned method.

Based on the hardware implementation of the above program modules, and in order to implement the method of the embodiment of the present application, the embodiment of the present application further provides a network device. FIG. 16 only shows an exemplary structure of the network device but not the entire structure, and some or all of the structures shown in FIG. 16 can be implemented as required.

As shown in FIG. 16 , a network device 1600 provided in this embodiment of the present application includes: at least one processor 1601 , a memory 1602 , a user interface 1603 and at least one network interface 1604 . Various components in the network device 1600 are coupled together through a bus system 1605 . It can be understood that the bus system 1605 is used to realize connection and communication between these components. In addition to the data bus, the bus system 1605 also includes a power bus, a control bus and a status signal bus. However, the various buses are labeled as bus system 1605 in FIG. 16 for clarity of illustration.

Wherein, the user interface 1603 may include a display, a keyboard, a mouse, a trackball, a click wheel, keys, buttons, a touch panel or a touch screen, and the like.

The memory 1602 in the embodiment of the present application is used to store various types of data to support the operation of the network device. Examples of such data include: any computer programs used to operate on network equipment.

The time-aware network data packet transmission method disclosed in the embodiment of the present application may be applied to the processor 1601 or implemented by the processor 1601 . The processor 1601 may be an integrated circuit chip with signal processing capability. In the implementation process, each step of the time-clear network data packet transmission method may be completed by an integrated logic circuit of hardware in the processor 1601 or instructions in the form of software. The aforementioned processor 1601 may be a general-purpose processor, DSP or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like. The processor 1601 may implement or execute various methods, steps, and logic block diagrams disclosed in the embodiments of the present application. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module can be located in the storage medium, the storage medium is located in the memory 1602, the processor 1601 reads the information in the memory 1602, and combines with its hardware to complete the steps of the time-clear network data packet transmission method provided by the embodiment of the present application.

In an exemplary embodiment, the network device 1600 may be implemented by one or more ASICs, DSPs, PLDs, CPLDs, FPGAs, general processors, controllers, MCUs, Microprocessors, or other electronic components for performing the aforementioned methods.

Exemplarily, the network device 1600 may be a network element of a wireless network. Taking a 5G network as an example, the network device 1600 may be a UE or a UPF.

It can be understood that the memory 1502, 1602 may be a volatile memory or a non-volatile memory, and may also include both volatile and non-volatile memory. Wherein, non-volatile memory can be read-only memory (ROM, Read Only Memory), programmable read-only memory (PROM, Programmable Read-Only Memory), erasable programmable read-only memory (EPROM, Erasable Programmable Read-Only Memory) Memory), Electrically Erasable Programmable Read-Only Memory (EEPROM, Electrically Erasable Programmable Read-Only Memory), Magnetic Random Access Memory (FRAM, ferromagnetic random access memory), Flash Memory (Flash Memory), Magnetic Surface Memory, Optical disc, or compact disc read-only memory (CD-ROM, Compact Disc Read-Only Memory); magnetic surface storage can be magnetic disk storage or magnetic tape storage. The volatile memory may be random access memory (RAM, Random Access Memory), which is used as an external cache. By way of illustration and not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM, Static Random Access Memory), Synchronous Static Random Access Memory (SSRAM, Synchronous Static Random Access Memory), Dynamic Random Access Memory Memory (DRAM, Dynamic Random Access Memory), Synchronous Dynamic Random Access Memory (SDRAM, Synchronous Dynamic Random Access Memory), Double Data Rate Synchronous Dynamic Random Access Memory (DDRSDRAM, Double Data Rate Synchronous Dynamic Random Access Memory), Enhanced Synchronous Dynamic Random Access Memory (ESDRAM, Enhanced Synchronous Dynamic Random Access Memory), Synchronous Link Dynamic Random Access Memory (SLDRAM, SyncLink Dynamic Random Access Memory), Direct Memory Bus Random Access Memory (DRRAM, Direct Rambus Random Access Memory) . The memories described in the embodiments of the present application are intended to include, but are not limited to, these and any other suitable types of memories.

In an exemplary embodiment, the embodiment of the present application also provides a storage medium, that is, a computer storage medium, specifically, a computer-readable storage medium, for example, including a memory 1502 storing a computer program, and the above-mentioned computer program can be used by the TAN switching device The processor 1501 executes to complete the steps described in the method of the embodiment of this application; as another example, it includes a memory 1602 that stores computer programs, and the above computer program can be executed by the processor 1601 of the network device to complete the steps described in the method of the embodiment of this application step. The computer-readable storage medium may be memory such as ROM, PROM, EPROM, EEPROM, FlashMemory, magnetic surface memory, optical disk, or CD-ROM.

It should be noted that: "first", "second", etc. are used to distinguish similar objects, and not necessarily used to describe a specific order or sequence.

In addition, the technical solutions described in the embodiments of the present application may be combined arbitrarily if there is no conflict.

The above is only the specific implementation of the application, but the scope of protection of the application is not limited thereto. Anyone familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the application. Should be covered within the protection scope of this application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims (16)

1. A transmission method of time-aware network data packets is applied to a time-aware network TAN switching device, and the method comprises:

determining a corresponding broken packet serial number according to the generation sequence of the TAN broken packets of the TAN data packets;

sending the TAN broken packet, wherein the head of the TAN broken packet carries the broken packet serial number;

wherein, the broken packet sequence number occupies at least two bits and is used for uniquely indicating the broken packet sequence of the corresponding TAN broken packet; and the TAN packet interruption is a data packet generated after being interrupted based on a preemptive transmission mechanism in the process of sending the TAN data packet.

2. The method of claim 1, wherein the broken packet sequence number further has a dynamic indication manner of one bit to dynamically indicate the broken packet order of the corresponding TAN broken packet; and the head of the TAN broken packet also carries a broken packet sequence bit identifier used for indicating the broken packet sequence number to adopt a dynamic indication or unique indication mode.

3. The method of claim 2,

and the broken packet sequence bit identification and/or at least part of the broken packet sequence number occupy a reserved field of the head of the TAN broken packet.

4. The method of claim 1, further comprising:

receiving a plurality of TAN broken packets corresponding to the same TAN data packet, wherein the head of each TAN broken packet carries the broken packet serial number;

determining the reassembly sequence of each TAN packet break based on the packet break sequence number of each TAN packet break;

and restoring the TAN data packet based on the reorganization sequence.

5. A method for transmitting time-resolved network packets, the method being applied to a network element of a wireless network, the method comprising:

receiving a plurality of TAN broken packets which are sent by TAN switching equipment and correspond to the same TAN data packet, wherein the head of each TAN broken packet carries a broken packet serial number;

packaging the received TAN broken packet into an IP message and determining a header field of the IP message according to the header of the TAN broken packet;

sending the IP message;

the packet-break sequence number dynamically indicates the packet-break sequence of the corresponding TAN packet-break by using one bit, and the header field of the IP message can indicate the packet-break sequence of the corresponding TAN packet-break.

6. The method according to claim 5, wherein the determining a header field of the IP packet according to the header of the TAN packet break comprises:

determining the identification of the IP message according to the TAN data frame identification of the TAN packet interruption;

determining the mark of the IP message according to the packet breaking serial number of the TAN packet breaking;

and determining the slice offset of the IP message according to the length of the TAN broken packet.

7. The method of claim 5, further comprising:

receiving a plurality of IP messages corresponding to the same TAN data packet, wherein a header field of the IP message corresponding to the TAN broken packet of the TAN data packet is determined according to a broken packet serial number of the TAN broken packet;

determining the recombination sequence of each TAN broken packet based on the header field of each IP message;

restoring the TAN data packet based on the reassembly sequence;

and sending the TAN data packet to the TAN switching equipment.

8. A transmission method of time-resolved network data packets is applied to a TAN switching device, and the method comprises the following steps:

and in the wireless transmission mode, the transmission of the TAN data packet based on the preemptive transmission mechanism is stopped.

9. The method of claim 8, wherein terminating transmission of the TAN packet based on the preemptive transport mechanism comprises:

if the inlet of the TAN switching device receives a first TAN data packet and the outlet of the TAN switching device is transmitting a second TAN data packet, interrupting the transmission of the second TAN data packet, preferentially sending the first TAN data packet and retransmitting the complete second TAN data packet after sending the first TAN data packet.

10. The method of claim 8, further comprising:

and terminating the transmission of the TAN data packet based on the preemptive transmission mechanism under the wireless transmission mode based on the local policy configuration or the policy configuration sent by the TAN system.

11. A transmission apparatus for time-resolved network packets, the transmission apparatus being applied to a TAN switching device, the transmission apparatus comprising:

the determining module is used for determining a corresponding packet break serial number of the TAN broken packet of the TAN data packet based on the generation sequence;

a sending module, configured to send the TAN packet break, where a header of the TAN packet break carries the packet break sequence number;

the broken packet sequence number occupies at least two bits and is used for uniquely indicating the broken packet sequence of the corresponding TAN broken packet; and the TAN packet interruption is a data packet generated after being interrupted based on a preemptive transmission mechanism in the process of sending the TAN data packet.

12. A device for transmitting a time-resolved network packet, the device being applied to a network element of a wireless network, the device comprising:

a receiving module, configured to receive multiple TAN broken packets corresponding to the same TAN data packet sent by a TAN switching device, where a head of each TAN broken packet carries a broken packet sequence number;

a determining module, configured to encapsulate the received TAN packet break into an IP packet and determine a header field of the IP packet according to a header of the TAN packet break;

the sending module is used for sending the IP message;

the packet-break sequence number dynamically indicates the packet-break sequence of the corresponding TAN packet-break by using one bit, and the header field of the IP message can indicate the packet-break sequence of the corresponding TAN packet-break.

13. A transmission apparatus for time-resolved network packets, which is applied to a TAN switching device, the transmission apparatus comprising:

and the control module is used for stopping transmitting the TAN data packet based on the preemptive transmission mechanism in the wireless transmission mode.

14. A TAN switching device, comprising: a processor and a memory for storing a computer program capable of running on the processor, wherein,

the processor, when executing the computer program, performs the steps of the method of any of claims 1 to 4 or 8 to 10.

15. A network device, comprising: a processor and a memory for storing a computer program capable of running on the processor, wherein,

the processor, when executing the computer program, is adapted to perform the steps of the method of any of claims 5 to 7.

16. A storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, performs the steps of the method of any one of claims 1 to 10.

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