Multi-channel high-bandwidth-utilization-rate reliable transmission method and device for deterministic network

Abstract

The invention relates to the technical field of mobile communication, and particularly provides a reliable transmission method and device for deterministic network multi-channel high bandwidth utilization rate, first, link perception information is added, R-TAG middle 16-bit semantics are expanded, the middle 16-bit value 0 * 1z of an R-TAG is defined and is link perception enabling, z identifies a link number, a first wireless link is 1, and a second link is 2; the last 16 bits after the R-TAG are FRER serial numbers which are kept consistent with the existing R-TAG; and the sending end adjusts a double-sending link sending strategy according to the z-path packet loss rate, the first-path packet loss rate is recorded as Z1, and the second-path packet loss rate is recorded as Z2. Compared with the prior art, the network bandwidth utilization rate can be improved.

Description

Technical Field

[0001] The present invention relates to the field of mobile communication technology, and specifically provides a deterministic network multi-channel high-bandwidth utilization reliability transmission method and device. Background Art

[0002] The fifth generation of mobile communication technology (5G) and subsequent mobile communication networks provide full-factor network interconnection for people, machines and objects for the Industrial Internet. Applications such as ultra-high-definition video, AR, VR, remote control, and cloud-based automatic guided vehicles in the Industrial Internet require low network packet loss rate, low transmission delay, and low transmission delay jitter.

[0003] 5G TSN is an important technology for industrial interconnection to achieve low latency, high reliability and deterministic transmission. Time Sensitive Network (TSN), based on traditional Ethernet, enhances FRER frame replication and elimination technology, time synchronization, and time-gated scheduling to provide deterministic Layer 2 network transmission. 5G TSN connects the 5G network with the IEEE TSN network to achieve an end-to-end L2 TSN deterministic transmission network. 5G TSN uses the 5G system as a TSN logical bridge to provide deterministic forwarding capabilities from the terminal to the 5G UPF. To support the integration of 5G and TSN, a terminal-side TSN converter (DS-TT) module is added to the terminal side, and a network-side TSN converter (NW-TT) module is added to the core network user plane function (UPF) side.

[0004] FRER (Frame Replication and Elimination for Reliability) frame replication and elimination for reliability technology is designed to enhance the reliability of Ethernet networks. FRER uses frame replication and elimination technology to provide redundancy protection and fast recovery from connection failures. The specified frame replication and reliability elimination provides higher reliability (reduced packet loss rate) for the flow through sequence numbering and selective duplication of each packet in the source system in the network, and elimination of those duplications in the target system.

[0005] 5G TSN dual transmission and selective reception (FRER) uses two independent wireless links to achieve data frame replication and reliability elimination in DS-TT and NW-TT, which not only avoids occasional interference in the air interface wireless link that causes retransmission or even packet loss, but also avoids service interruption caused by sudden anomalies, thereby improving end-to-end service reliability. Figure 2 shown.

[0006] 5G TSN's FRER improves network reliability while reducing network bandwidth utilization. One of the two independent wireless links transmits redundant data, resulting in 50% of the overall bandwidth being used to transmit redundant data, reducing the overall bandwidth utilization for transmitting valid data.

[0007] How to improve network reliability by enhancing FRER and adding link quality perception capability and dynamically adjusting the dual-transmission link based on the link quality perception results to improve network bandwidth utilization is an urgent problem to be solved by technicians in this field. Summary of the invention

[0008] The present invention aims at the above-mentioned deficiencies of the prior art and provides a highly practical deterministic network multi-channel high bandwidth utilization reliability transmission method.

[0009] A further technical task of the present invention is to provide a deterministic network multi-channel high-bandwidth utilization reliability transmission device that is reasonably designed, safe and applicable.

[0010] The technical solution adopted by the present invention to solve its technical problem is:

[0011] A reliable transmission method with high bandwidth utilization of multi-channel in a deterministic network, firstly, link perception information is added, the semantics of the middle 16 bits of R-TAG are extended, and the middle 16 bits of R-TAG are defined as 0x1z, which is link perception enable, where z identifies the link number, the first wireless link is 1, and the second link is 2; the last 16 bits after R-TAG are the FRER sequence number, which is consistent with the existing R-TAG;

[0012] The sender adjusts the dual-link sending strategy according to the packet loss rate of the z-path. The packet loss rate of the first path is recorded as Z1, and the packet loss rate of the second path is recorded as Z2.

[0013] Furthermore, the middle 16-bit value 0x2z of R-TAG is defined as link sensing disabling, where z identifies the link number, the first wireless link is 1, and the second link is 2; the last 16 bits after R-TAG are the FRER sequence number;

[0014] The middle 16-bit value of R-TAG is defined as 0x3z, which is the link perception quality feedback result; the last 16 bits after R-TAG are the FRER sequence number 0.

[0015] Furthermore, during link sensing, the steps are as follows:

[0016] A. Perception enabling;

[0017] B. Perception disenabling;

[0018] C. Feedback on perceived results;

[0019] D. Link-aware summary calculation.

[0020] Furthermore, in step A, the transmitting end enables link perception, sets the middle 16 bits of the frame R-TAG to 0x1z, where z is the link number, and records the number of sent frames C1; when the receiving end decodes the middle 16 bits of the frame R-TAG to 0x1z, it is necessary to record the number of frames received on this link. When the middle 16 bits of multiple frames R-TAG are received and set to 0x1z, the number of frames on this link needs to be accumulated and saved in counter C2.

[0021] Furthermore, in step B, the transmitting end disables link sensing, sets the middle 16 bits of the frame R-TAG to 0x2z, where z is the link number, and saves the number of frames C1 sent during the enabling of link sensing. When the middle 16 bits of the decoded frame R-TAG are 0x2z, the receiving end stops counting link messages, saves counter C2, and prepares to enter step c.

[0022] Further, in step C, the receiving end constructs a link perception quality feedback frame, the middle 16-bit value of R-TAG is 0x3z, where z is the identification link number, and the C2 value is after R-TAG;

[0023] In step D, the transmitting end calculates the link quality of different links based on the link perception quality feedback frame, and the calculation method is Z-path packet loss rate = (C1-C2) / C1*100.

[0024] Furthermore, in the process of dynamically adjusting the strategy at the transmitting end to adjust the dual-transmit link, the specific steps are as follows:

[0025] (1) If the current transmission is single-channel and the packet loss rate Z is greater than the threshold T2, jump to step (4) and fall back to dual-channel transmission; otherwise, jump to step (5) and maintain single-channel transmission;

[0026] (2) If it is dual-path transmission, when Z2-Z1 is greater than the threshold T1, that is, the packet loss rate of link 2 is higher than the packet loss rate of link 1, and Z1 is less than the threshold T2, that is, when the packet loss rate of link 1 meets the requirement, only link 1 is used for transmission, that is, switching to single-path transmission jumps to step (5); otherwise, execute step (3);

[0027] (3) For dual-path transmission, when Z1-Z2 is greater than the threshold T1, that is, the packet loss rate of link 1 is higher than the packet loss rate of link 2, and Z2 is less than the threshold T2, that is, when the packet loss rate of link 2 meets the requirement, only link 2 is used for transmission, that is, switching to single-path transmission jumps to step (5); otherwise, execute step (4);

[0028] (4) When sending in two ways, jump to step (5);

[0029] (5) Link adjustment is completed.

[0030] A deterministic network multi-channel high-bandwidth utilization reliability transmission device, comprising: at least one memory and at least one processor;

[0031] The at least one memory is used to store a machine-readable program;

[0032] The at least one processor is used to call the machine-readable program to execute a deterministic network multi-channel high-bandwidth utilization reliability transmission method.

[0033] Compared with the prior art, the deterministic network multi-channel high bandwidth utilization reliability transmission method and device of the present invention have the following outstanding beneficial effects:

[0034] Based on the improvement of network reliability by 5G TSN dual transmission and selective reception (FRER), the present invention improves network bandwidth utilization by enhancing FRER to add link quality perception capability and performing a dual transmission link dynamic adjustment mechanism based on the link quality perception results.

[0035] The dynamic adjustment mechanism of dual-transmission links can dynamically stop the transmission of the other network link when it is perceived that the quality of one of the dual-transmission links can meet the low packet loss rate. The saved network bandwidth can be used by other users in the network. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Attached Figure 1 It is an R-TAG format diagram in a reliable transmission method with high bandwidth utilization in a deterministic network with multiple channels;

[0038] Attached Figure 2 This is the 5G TSN FRER network architecture diagram in the existing technology. DETAILED DESCRIPTION

[0039] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention is further described in detail below in conjunction with specific implementation methods. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] A best embodiment is given below:

[0041] In this embodiment, a deterministic network multi-channel high-bandwidth utilization reliability transmission method is used. The existing FRER encodes the sequence number into the frame. The redundant tag (R-TAG) is a 48-bit tag located after the VLAN tag. The first 16 bits are the R-TAG type value 0xF1C1, the middle 16 bits are 0x00, and the last 16 bits are the FRER sequence number.

[0042] The sender implements R-TAG encoding, encapsulates the duplicate frame with the same R-TAG as the original frame, and the FRER sequence number increases with the number of frames. The receiver implements R-TAG decoding, removes duplications from the same R-TAG decoding, and only forwards the earliest arriving frame with the same R-TAG under dual links.

[0043] On the basis of the existing FRER, link awareness information is added. The semantics of the middle 16 bits of R-TAG are extended, and the middle 16 bits of R-TAG are defined as 0x1z, which is link awareness enable, where z identifies the link number, the first wireless link is 1, and the second link is 2; the last 16 bits after R-TAG are the FRER sequence number, which is consistent with the existing R-TAG.

[0044] The middle 16-bit value 0x2z of R-TAG is defined to disable link sensing, where z identifies the link number, the first wireless link is 1, and the second link is 2; the last 16 bits after R-TAG are the FRER sequence number, which is consistent with the existing R-TAG.

[0045] The middle 16-bit value of R-TAG is defined as 0x3z, which is the link quality feedback result; the last 16 bits after R-TAG are the FRER sequence number 0. See the R-TAG format for details. Figure 1 .

[0046] During link sensing, the steps are as follows:

[0047] A. Perception enabling;

[0048] The sending end enables link awareness, sets the middle 16 bits of the frame R-TAG to 0x1z, where z is the link number, and records the number of sent frames C1; when the receiving end decodes the middle 16 bits of the frame R-TAG to 0x1z, it needs to record the number of frames received on this link.

[0049] When the middle 16 bits of multiple R-TAG frames are received and set to 0x1z, the number of frames on this link needs to be accumulated and saved in counter C2.

[0050] B. Perception disenabling;

[0051] The transmitter disables link sensing, and the middle 16 bits of the frame R-TAG are set to 0x2z, where z is the link number. The number of frames C1 sent during the period of enabling link sensing is saved.

[0052] When the middle 16 bits of the decoded frame R-TAG are 0x2z, the receiving end stops counting the link message, saves the counter C2, and prepares to enter step 3.

[0053] C. Feedback on perceived results;

[0054] The receiving end constructs a link perception quality feedback frame, with the middle 16-bit value of R-TAG being 0x3z, where z is the link number. The C2 value is after R-TAG.

[0055] D. Link-aware summary calculation;

[0056] The transmitter calculates the link quality of different links based on the link perception quality feedback frame. The calculation method is: Z-path packet loss rate = (C1-C2) / C1*100.

[0057] The sender adjusts the dual-link sending strategy according to the packet loss rate of the z-path. The packet loss rate of the first path is recorded as Z1, and the packet loss rate of the second path is recorded as Z2.

[0058] Dynamically adjust the strategy at the sending end to adjust the dual-transmit link:

[0059] (1) If the current transmission is single-channel and the packet loss rate Z is greater than the threshold T2, jump to step (4) and fall back to dual-channel transmission; otherwise, jump to step (5) and maintain single-channel transmission;

[0060] (2) If it is dual-path transmission, when Z2-Z1 is greater than the threshold T1, that is, the packet loss rate of link 2 is higher than the packet loss rate of link 1, and Z1 is less than the threshold T2, that is, when the packet loss rate of link 1 meets the requirement, only link 1 is used for transmission, that is, switching to single-path transmission jumps to step (5); otherwise, execute step (3);

[0061] (3) For dual-path transmission, when Z1-Z2 is greater than the threshold T1, that is, the packet loss rate of link 1 is higher than the packet loss rate of link 2, and Z2 is less than the threshold T2, that is, when the packet loss rate of link 2 meets the requirement, only link 2 is used for transmission, that is, switching to single-path transmission jumps to step (5); otherwise, execute step (4);

[0062] (4) When sending in two ways, jump to step (5);

[0063] (5) Link adjustment is completed.

[0064] The thresholds T1 and T2 are configurable packet loss rate thresholds.

[0065] Based on the above method, a deterministic network multi-channel high bandwidth utilization reliability transmission device in this embodiment includes: at least one memory and at least one processor;

[0066] The at least one memory is used to store a machine-readable program;

[0067] The at least one processor is used to call the machine-readable program to execute a deterministic network multi-channel high-bandwidth utilization reliability transmission method.

[0068] The above-mentioned specific implementations are only specific cases of the present invention. The patent protection scope of the present invention includes but is not limited to the above-mentioned specific implementations. Any technical solutions that conform to the above-mentioned specific implementations of the present invention and any appropriate changes or substitutions made by ordinary technicians in the relevant technical field shall fall within the patent protection scope of the present invention.

[0069] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A reliable transmission method with high bandwidth utilization in a deterministic network with multiple channels, characterized in that: First, link awareness information is added, the semantics of the middle 16 bits of R-TAG are extended, and the middle 16 bits of R-TAG are defined as 0x1z, which is link awareness enable, where z identifies the link number, the first wireless link is 1, and the second link is 2; the last 16 bits after R-TAG are the FRER sequence number, which is consistent with the existing R-TAG; The sender adjusts the dual-link sending strategy according to the packet loss rate of the z-path. The packet loss rate of the first path is recorded as Z1, and the packet loss rate of the second path is recorded as Z2.

2. According to claim 1, a deterministic network multi-channel high bandwidth utilization reliability transmission method is characterized in that: The middle 16-bit value of R-TAG is defined as 0x2z, which is link sensing disabled, where z identifies the link number, the first wireless link is 1, and the second link is 2; the last 16 bits after R-TAG are the FRER sequence number; The middle 16-bit value of R-TAG is defined as 0x3z, which is the link perception quality feedback result; the last 16 bits after R-TAG are the FRER sequence number 0.

3. According to claim 2, a deterministic network multi-channel high bandwidth utilization reliability transmission method is characterized in that: During link sensing, the steps are as follows: A. Perception enabling; B. Perception disenabling; C. Feedback on perceived results; D. Link-aware summary calculation.

4. According to claim 3, a reliable transmission method with high bandwidth utilization in a deterministic network with multi-channels is characterized in that: In step A, the sending end enables link perception, sets the middle 16 bits of the frame R-TAG to 0x1z, where z is the link number, and records the number of sent frames C1; when the receiving end decodes the middle 16 bits of the frame R-TAG to 0x1z, it needs to record the number of frames received on this link. When the middle 16 bits of multiple frames R-TAG are received and set to 0x1z, the number of frames on this link needs to be accumulated and saved in counter C2.

5. According to claim 4, a deterministic network multi-channel high bandwidth utilization reliability transmission method is characterized in that: In step B, the sending end disables link sensing, sets the middle 16 bits of the frame R-TAG to 0x2z, where z is the link number, and saves the number of frames C1 sent during the period of enabling link sensing. When the middle 16 bits of the decoded frame R-TAG are 0x2z, the receiving end stops counting link messages, saves counter C2, and prepares to enter step c.

6. A reliable transmission method with high bandwidth utilization in a deterministic network with multi-channel according to claim 5, characterized in that: In step C, the receiving end constructs a link perception quality feedback frame, the middle 16-bit value of R-TAG is 0x3z, where z is the link number, and the C2 value is after R-TAG; In step D, the transmitting end calculates the link quality of different links based on the link perception quality feedback frame, and the calculation method is Z-path packet loss rate = (C1-C2) / C1*100.

7. The method for reliable transmission of deterministic network multi-channel high bandwidth utilization according to claim 5, characterized in that: When the sending end dynamically adjusts the strategy to adjust the dual-transmit link, the specific steps are as follows: (1) If the current transmission is single-channel and the packet loss rate Z is greater than the threshold T2, jump to step (4) and fall back to dual-channel transmission; otherwise, jump to step (5) and maintain single-channel transmission; (2) If it is dual-path transmission, when Z2-Z1 is greater than the threshold T1, that is, the packet loss rate of link 2 is higher than the packet loss rate of link 1, and Z1 is less than the threshold T2, that is, when the packet loss rate of link 1 meets the requirement, only link 1 is used for transmission, that is, switching to single-path transmission jumps to step (5); otherwise, execute step (3); (3) For dual-path transmission, when Z1-Z2 is greater than the threshold T1, that is, the packet loss rate of link 1 is higher than the packet loss rate of link 2, and Z2 is less than the threshold T2, that is, when the packet loss rate of link 2 meets the requirement, only link 2 is used for transmission, that is, switching to single-path transmission jumps to step (5); otherwise, execute step (4); (4) When sending in two ways, jump to step (5); (5) Link adjustment is completed.

8. A reliable transmission device with high bandwidth utilization and multi-channel in a deterministic network, characterized in that: include: at least one memory and at least one processor; The at least one memory is used to store a machine-readable program; The at least one processor is configured to call the machine-readable program to execute the method according to any one of claims 1 to 7.

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