CN114070776A - Improved time-sensitive network data transmission method, device and equipment - Google Patents
Improved time-sensitive network data transmission method, device and equipment Download PDFInfo
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Abstract
The application discloses an improved time-sensitive network data transmission method, device and equipment, and relates to the field of communication. The method comprises the steps that a control device obtains resource information (such as bandwidth occupancy rate and/or cache capacity) of at least two network devices, determines the waiting delay of each network device for forwarding a first data packet according to the resource information, and controls each network device to forward the first data packet according to the indicated waiting delay. Therefore, the control equipment intelligently controls the waiting time delay of the network equipment for forwarding the first data packet according to the resource information of the network equipment, and avoids the time delay overtime of the data packet forwarding from the source equipment to the destination equipment caused by the overlong queuing time of the data packet when the network equipment forwards the data packet as far as possible, so that the time delay of the data packet forwarding meets the deterministic time delay requirement of the data packet as far as possible.
Description
Technical Field
The present application relates to the field of communications, and in particular, to an improved method, apparatus, and device for transmitting time-sensitive network data.
Background
A Time Sensitive Network (TSN) is a networking mechanism that is defined on the basis of ethernet and supports data with deterministic delay, low jitter and zero packet loss rate, and is used to increase the certainty and reliability of ethernet.
Generally, the network device takes the time order of receiving the packets as the order of forwarding the packets. For example, when the network device receives a first data packet at a first time and receives a second data packet at a second time, the network device forwards the first data packet and then forwards the second data packet. For a data packet with a deterministic delay requirement, if queuing and forwarding are performed according to a time sequence from first-come to first-send and then-come to last-send, a delay of forwarding the data packet by a network device on a path for transmitting the data packet between a source device and a destination device may be overtime, and the deterministic delay requirement of the data packet cannot be met. How to make the delay of forwarding the data packet meet the requirement of deterministic delay of the data packet as much as possible is an urgent problem to be solved.
Disclosure of Invention
The application provides an improved time-sensitive network data transmission method, device and equipment, which are used for enabling the time delay of a forwarding data packet to meet the requirement of the deterministic time delay of the data packet as much as possible.
In order to achieve the purpose, the following technical scheme is adopted in the application.
In a first aspect, an improved time-sensitive network data transmission method is provided, and the method includes that a control device obtains resource information (such as bandwidth occupancy and/or cache capacity) of at least two network devices, determines a waiting delay for each network device to forward a first data packet according to the resource information, and controls each network device to forward the first data packet according to the indicated waiting delay.
Therefore, the control equipment intelligently controls the waiting time delay of the network equipment for forwarding the first data packet according to the resource information of the network equipment, and avoids the time delay overtime of the data packet forwarding from the source equipment to the destination equipment caused by the overlong queuing time of the data packet when the network equipment forwards the data packet as far as possible, so that the time delay of the data packet forwarding meets the time delay requirement of the data packet as far as possible.
In a possible implementation manner, if the resource information is the bandwidth occupancy rates of at least two network devices, determining, according to the resource information, a waiting time delay for each network device to forward the first data packet includes: and the control equipment determines the bandwidth occupancy rate grade of each network equipment according to the bandwidth occupancy rate and the management information of each network equipment. And determining the waiting time delay for forwarding the first data packet by each network device according to the bandwidth occupancy rate level of each network device, wherein the management information is used for indicating the corresponding relation between the bandwidth occupancy rate range and the bandwidth occupancy rate level.
For example, if the level of the bandwidth occupancy of the first network device is a first level, the preset waiting time delay for forwarding the first data packet by the first network device is adjusted to be a first waiting time delay, the first waiting time delay is smaller than the preset waiting time delay, and the first network device is any one of the at least two network devices.
For another example, if the level of the bandwidth utilization of the first network device is the second level, the preset waiting delay is used as a second waiting delay for the first network device to forward the first data packet, the second waiting delay is equal to the preset waiting delay, and the second level is smaller than the first level.
For another example, if the level of the bandwidth utilization of the first network device is a third level, the preset waiting time delay for forwarding the first data packet by the first network device is adjusted to be a third waiting time delay, the third waiting time delay is greater than the preset waiting time delay, and the third level is smaller than the second level.
The control device may determine the preset waiting time delay for each network device to forward the first data packet according to the preset total waiting time delay and the number of the at least two network devices. The preset total waiting time delay is used for indicating the waiting time of the first data packet forwarded by the at least two network devices.
The level of the bandwidth occupancy rate of the network device may be understood as the busy degree of the network device, and if the level of the bandwidth occupancy rate of the network device is the first level, it may be understood that the network device is busy, so that the waiting time delay of the network device for forwarding the first data packet may be reduced, the network device may forward the first data packet as soon as possible, and the queuing time of the first data packet at the network device is prevented from being too long. If the level of the bandwidth occupancy rate of the network device is the second level, it can be understood that the busy degree of the network device is moderate, and the first data packet can be normally queued and forwarded at the network device. If the bandwidth occupancy rate of the network device is the third level, it can be understood that the network device is idle, and the first data packet may wait more at the network device, so that the network device may forward other data packets that have been waiting at the network device, and it is avoided as much as possible that the delay for forwarding the data packet between the source device and the destination device is overtime due to the excessively long queuing time of the data packet when the network device with the excessively high bandwidth occupancy rate forwards the data packet, so that the delay for forwarding the data packet satisfies the deterministic delay requirement of the data packet as much as possible.
In another possible implementation manner, if the resource information is the cache capacities of at least two network devices, determining, according to the resource information, a waiting time delay for each network device to forward the first data packet includes: the control equipment acquires the total cache capacity of at least two network equipment; and determining the waiting time delay for forwarding the first data packet by each network device according to the proportion of the cache capacity to the total cache capacity of each network device and the preset waiting total time delay, wherein the preset waiting total time delay is used for indicating the waiting time for forwarding the first data packet by at least two network devices.
If network devices with different cache capacities transmit data packets with the same waiting delay, the network device with a smaller cache capacity cannot process a large number of data packets in time when receiving the large number of data packets, which may cause the waiting delay of the data packets to be overtime. The control device intelligently adjusts the waiting time delay of the network device for forwarding the first data packet according to the cache capacity of the network device. For example, the control device allocates the waiting delay to the network device with larger buffer capacity, which is larger than the waiting delay allocated to the network device with smaller buffer capacity, and the delays are complementary. The method and the device can avoid time delay overtime of the first data packet forwarded from the source device to the destination device caused by overlong queuing time of the first data packet when the network device with smaller cache capacity forwards the first data packet as much as possible, so that the time delay for forwarding the first data packet can meet the requirement of deterministic time delay of the first data packet as much as possible.
In one possible implementation, controlling each network device to forward the first packet according to the indicated waiting delay includes: and sending a control instruction to each network device, wherein the control instruction is used for instructing each network device to forward the first data packet according to the instructed waiting time delay. Each network device forwards the first data packet according to the indicated waiting delay, wherein the indicated waiting delay is the waiting delay adjusted by the control device according to the resource information of the network device, and the time delay overtime of the first data packet on a path for transmitting the first data packet caused by the overtime of the waiting delay of the first data packet at a certain network device is reduced, so that the time delay for forwarding the first data packet can meet the deterministic time delay requirement of the first data packet as much as possible.
In a second aspect, a communication apparatus is provided, which includes a receiving unit and a processing unit, where the receiving unit is configured to obtain resource information of at least two network devices, and the resource information includes bandwidth occupancy rates and buffer capacities of the at least two network devices; the processing unit is used for determining the waiting time delay of each network device for forwarding the first data packet according to the resource information; and the processing unit is further used for controlling each network device to forward the first data packet according to the indicated waiting time delay.
In a possible implementation manner, if the resource information is bandwidth occupancy rates of at least two network devices, the processing unit is specifically configured to: determining the bandwidth occupancy rate level of each network device according to the bandwidth occupancy rate and management information of each network device, wherein the management information is used for indicating the corresponding relation between the bandwidth occupancy rate range and the bandwidth occupancy rate level; and determining the waiting time delay of the first data packet forwarded by each network device according to the level of the bandwidth occupancy rate of each network device.
In a possible implementation manner, the processing unit is specifically configured to: if the level of the bandwidth occupancy rate of the first network device is a first level, adjusting a preset waiting time delay of the first network device for forwarding the first data packet to be a first waiting time delay, wherein the first waiting time delay is smaller than the preset waiting time delay, and the first network device is any one of at least two network devices; if the level of the bandwidth utilization rate of the first network equipment is a second level, taking the preset waiting time delay as a second waiting time delay for the first network equipment to forward the first data packet, wherein the second waiting time delay is equal to the preset waiting time delay, and the second level is smaller than the first level; if the level of the bandwidth utilization rate of the first network device is a third level, adjusting the preset waiting time delay of the first network device for forwarding the first data packet to be a third waiting time delay, wherein the third waiting time delay is greater than the preset waiting time delay, and the third level is less than the second level.
In a possible implementation manner, the processing unit is further configured to determine a preset waiting time delay for each network device to forward the first data packet according to the preset total waiting time delay and the number of the at least two network devices, where the preset total waiting time delay is used to indicate a waiting time for the at least two network devices to forward the first data packet.
In a possible implementation manner, if the resource information is the cache capacities of the at least two network devices, the receiving unit is specifically configured to obtain the total cache capacities of the at least two network devices; and the processing unit is specifically configured to determine, according to a ratio of the cache capacity to the total cache capacity of each network device and a preset total waiting time delay, a waiting time delay for each network device to forward the first data packet, where the preset total waiting time delay is used to indicate a waiting time for at least two network devices to forward the first data packet.
In a possible implementation manner, the apparatus further includes a sending unit, where the sending unit is configured to send a control instruction to each network device, and the control instruction is used to instruct each network device to forward the first data packet according to the instructed waiting delay.
In a third aspect, a communication device is provided, including: a processor and a memory; the memory stores instructions executable by the processor; the processor is configured to execute the instructions to cause the communication device to carry out any one of the methods as provided in the first aspect above.
In a fourth aspect, there is provided a communication system comprising: a control device and at least two network devices; the control device is configured to execute any one of the methods provided in the first aspect, so as to control at least two network devices to forward the first data packet according to the indicated waiting delay.
In a fifth aspect, a computer-readable storage medium is provided, which stores computer instructions that, when executed on a computer, cause the computer to perform any one of the methods provided by the first aspect.
In a sixth aspect, there is provided a computer program product comprising computer instructions which, when run on a computer, cause the computer to perform any of the methods provided by the first aspect.
Technical effects brought by any possible implementation manner of the second aspect to the sixth aspect may be brought into consideration with technical effects brought by a corresponding implementation manner of the first aspect, and are not described herein again.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and not to limit the invention.
Fig. 1 is a schematic structural diagram of a communication system according to an embodiment of the present application;
fig. 2 is a schematic flowchart of an improved time-sensitive network data transmission method according to an embodiment of the present application;
fig. 3 is a schematic diagram of a data transmission process according to an embodiment of the present application;
fig. 4 is a schematic diagram of a data transmission process according to an embodiment of the present application;
fig. 5 is a schematic diagram illustrating a communication device according to an embodiment of the present disclosure;
fig. 6 is a schematic hardware structure diagram of a communication device according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the embodiments of the present application, for convenience of clearly describing the technical solutions of the embodiments of the present application, terms such as "first" and "second" are used to distinguish the same items or similar items with substantially the same functions and actions. Those skilled in the art will appreciate that the terms "first," "second," etc. do not denote any order or quantity, nor do the terms "first," "second," etc. denote any order or importance. The technical features described in the first and second descriptions have no sequence or magnitude order.
In the embodiments of the present application, words such as "exemplary" or "for example" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present relevant concepts in a concrete fashion for ease of understanding.
In the description of the present application, a "/" indicates a relationship in which the objects associated before and after are an "or", for example, a/B may indicate a or B; in the present application, "and/or" is only an association relationship describing an associated object, and means that there may be three relationships, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. Also, in the description of the present application, "a plurality" means two or more than two unless otherwise specified. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or multiple.
In the embodiments of the present application, at least one may also be described as one or more, and a plurality may be two, three, four or more, which is not limited in the present application.
The improved time-sensitive network data transmission method provided by the embodiment of the application considers the resource information of the network equipment on the transmission path for transmitting the data packet end to end as a basis, and the control equipment can intelligently adjust the waiting time delay for forwarding the data packet for the network equipment according to the resource information of the network equipment, so that the time delay for forwarding the data packet by the network equipment on the transmission path can meet the deterministic time delay requirement of the data packet as far as possible.
An improved time-sensitive network data transmission method, device and apparatus provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a communication system according to an embodiment of the present application. As shown in fig. 1, communication system 10 includes a control device 100, service devices (such as service device 101 and service device 106 shown in fig. 1), at least two network devices (such as network device 102, network device 103, network device 104, and network device 105 shown in fig. 1).
The control device 100 is connected to the service device 101, the network device, and the service device 106, respectively. Service device 101 is connected to network device 102, network device 102 is connected to network device 103, network device 103 is connected to network device 104, network device 104 is connected to network device 105, and network device 105 is connected to service device 106.
The control device 100 may be a separate physical device, such as a server or a computer. Or may be a Virtual Machine (VM) on one physical device, for example, the functions of the control device and the functions of the network device are integrated on the same physical device. Or may be part of a network device, which is not limited in this application.
The control device 100 is configured to determine a waiting time delay for each network device to forward the data packet according to the resource information of each network device.
The service device may be a device having a wireless transceiving function. The service devices may be referred to by different names, such as User Equipment (UE), access terminal, terminal unit, terminal station, mobile station, remote terminal, mobile device, wireless communication device, terminal agent, or terminal equipment. If the service device 101 serves as a source device to transmit a data packet, the service device 106 serves as a destination device to receive the data packet. If the service device 106 serves as a source device to transmit the data packet, the service device 101 serves as a destination device to receive the data packet. The network device may be a switch or router, etc. The switch may be a switch supporting VLAN and three-layer switching technologies. In this embodiment, the network device may receive a control instruction sent by the control device, and forward the data packet according to the waiting delay indicated by the control instruction.
It should be understood that fig. 1 is an exemplary architecture diagram and that the communication system shown in fig. 1 includes an unlimited number of devices. The communication system shown in fig. 1 may include other devices besides the device shown in fig. 1, which is not limited to this.
Next, as shown in fig. 2, an embodiment of the present application provides an improved time-sensitive network data transmission method, which includes the following steps.
S201, the control device receives request information sent by the service device.
For a data packet with deterministic requirement on the time delay of forwarding the data packet, before the service device is used as a source device to send the data packet, the service device may send request information to the control device, where the request information includes an address of the source device, an address of a destination device, an identifier of the first data packet, and a preset waiting total time delay.
The address of the source device may be an IP address and the address of the destination device may be an IP address. For example, the source device may be the service device 101 shown in fig. 1, and the destination device may be the service device 106 shown in fig. 1.
The identifier of the first data packet may be used to uniquely indicate the first data packet, and may be, for example, the name of the first data packet. It will be appreciated that the identity of different data packets indicates different data packets. The service device may send request information of a plurality of data packets, and the control device may distinguish the plurality of data packets according to the identifier of the data packet. The first packet may be any one of a plurality of packets.
The preset total latency may be a latency indicated by a transmission requirement of the deterministic latency packet. For example, the preset total waiting time delay refers to a waiting time for at least two network devices between the source device and the destination device to forward the service data. The preset total waiting time delay can be preset by a manager. The preset total latency for different packets may be different.
It should be noted that the end-to-end deterministic delay T between the data packet from the source device to the destination device includes the switching delay TSFTransmission delay TQLLine transmission delay TWLAnd waiting delay delta, exchange delay TSFTransmission delay TQLAnd line transmission delay TWLThe delay delta can be understood as the processing delay of the network device to the data packet, and can be controlled. In the embodiment of the present application, the waiting total delay, that is, the waiting delay δ, is preset.
S202, the control device determines a transmission path.
The control device may determine the transmission path according to the address of the source device, the address of the destination device, and the preset total waiting time delay.
Generally, there are a plurality of transmission paths for transmitting packets between the source device and the destination device, and the control device may select one transmission path from the plurality of transmission paths. For example, the transmission path may be one of the plurality of transmission paths in which the number of network devices is the smallest, or may be one of the plurality of transmission paths in which the path is the shortest.
The transmission path includes at least two network devices, such as the communication system shown in fig. 1, and may be composed of network device 102, network device 103, network device 104, and network device 105. The at least two network devices may include network device 102, network device 103, network device 104, and network device 105.
The control device may determine the preset waiting time delay for each network device to forward the first data packet according to the preset total waiting time delay and the number of the at least two network devices included in the transmission path. The preset waiting time delay is the time delay requirement for each network device to forward the first data packet.
Illustratively, if the total preset waiting delay is 16 milliseconds (ms), and the transmission path includes 4 network devices, the preset waiting delay is 4ms, which means that any network device in the 4 network devices needs to forward the first data packet within 4 ms.
S203, the control device acquires resource information of at least two network devices.
In some embodiments, the at least two network devices may refer to all network devices in the transmission path determined by the control device. The control device receives resource information sent by at least two network devices included in the transmission path, so that the control device determines the waiting time delay of the network device for forwarding the first data packet according to the resource information of the network devices. The control device may also actively acquire resource information of each network device through a connection interface with at least two network devices.
In other embodiments, the at least two network devices may refer to network devices that do not forward the first data packet in the transmission path determined by the control device. And the network equipment transmits the first data packet to the control equipment and then transmits delay information, wherein the delay information comprises the actual waiting delay of the network equipment which has transmitted the first data packet for transmitting the first data packet. If the waiting time delay for forwarding the first data packet by the network equipment which has forwarded the first data packet is overtime, the control equipment acquires the resource information of the network equipment which has not forwarded the first data packet, and adjusts the waiting time delay of the network equipment which has not forwarded the first data packet.
The resource information includes bandwidth occupancy (which may be referred to as a busy level) and cache capacity of each network device. The bandwidth occupancy of each network device can be calculated by the following formula (1).
Wherein the content of the first and second substances,
for the bandwidth occupancy of the ith network device of the at least two network devices,
the number of bytes received per second for the ith network device,
number of bytes per second, B, sent for the ith network deviceiIs the bandwidth of the ith network device.
The buffer capacity may be divided into an intrinsic buffer capacity and an available buffer capacity. The intrinsic cache capacity is a storage capacity of the network device after manufacturing, for example, a memory of a mobile phone is 64 gigabits (G), and 64G is the intrinsic cache capacity. The available cache capacity refers to the cache capacity currently available to the network device. In this embodiment, the cache capacity may be an inherent cache capacity of the network device, or may be an available cache capacity of the network device.
And S204, the control equipment determines the waiting time delay of the first data packet forwarded by each network equipment according to the resource information.
Determining the latency of forwarding the first packet by each network device by the control device may include the following several scenarios.
In one case, if the resource information is the bandwidth occupancy of at least two network devices, the control device may determine, according to the bandwidth occupancy of each network device and the management information, the waiting delay for forwarding the first data packet by each network device. The management information is used for indicating the corresponding relation between the bandwidth occupancy rate range and the bandwidth occupancy rate level.
Illustratively, the management information may be as shown in table 1 below.
TABLE 1
And if the bandwidth occupancy rate of the network equipment is less than or equal to 40%, the network equipment is idle, and the bandwidth occupancy rate grade is a third grade. If the bandwidth occupancy rate of any network device is greater than 40% and less than 80%, it represents that the processing capacity of the network device is within the normal range, and the bandwidth occupancy rate level is the second level. If the bandwidth occupancy rate of any network device is greater than 80%, which represents that the network device is busy, the processing capacity is about to reach the processing limit of the network device, and the bandwidth occupancy rate is the first level.
In the following, it is assumed that the at least two network devices include a first network device, and the first network device forwards the first data packet for example, the first network device may be any one of the at least two network devices. Illustratively, the first network device may be network device 102 in fig. 1.
The determining, by the control device, the waiting delay for the first network device to forward the first data packet according to the bandwidth occupancy of the first network device may include the following several situations.
In case 1, if the level of the bandwidth occupancy of the first network device is the first level, the preset waiting time delay for forwarding the first data packet by the first network device is adjusted to be the first waiting time delay, and the first waiting time delay is smaller than the preset waiting time delay.
And 2, if the level of the bandwidth occupancy rate of the first network device is a second level, taking the preset waiting delay as a second waiting delay of the first network device for forwarding the first data packet, wherein the second waiting delay is equal to the preset waiting delay.
In case 3, if the level of the bandwidth occupancy of the first network device is the third level, the preset waiting time delay for forwarding the first data packet by the first network device is adjusted to be the third waiting time delay, and the third waiting time delay is greater than the preset waiting time delay.
Illustratively, if the total preset waiting delay is 16ms and the transmission path includes 4 network devices, the preset waiting delay is 4 ms.
If the bandwidth occupancy of the first network device is 90%, it may be understood that the first network device is busy at present, and the current processing capability of the first network device is about to reach the limit of the processing capability of the first network device, and by comparing the table 1, the level of the bandwidth occupancy of the first network device is determined to be the first level, and the preset waiting time delay of 4ms for the first network device to forward the first data packet may be adjusted to be the first waiting time delay of 0ms, that is, the first data packet is not waiting at the first network device, and the first network device directly forwards the first data packet to the next network device.
If the bandwidth occupancy of the first network device is 60%, it can be understood that the current busy level of the first network device is moderate and still within the processing capability of the first network device. Comparing table 1, determining that the level of the bandwidth occupancy rate of the first network device is the second level, and using the preset waiting time delay of 4ms for the first network device to forward the first data packet as the second waiting time delay of 4ms for the first network device to forward the first data packet.
If the bandwidth occupancy rate of the first network device is 20%, it may be understood that the first network device is currently idle, and the first data packet may be allowed to wait more at the first network device, so as to relieve the pressure of other network devices in the transmission path. Comparing the table 1, determining that the bandwidth occupancy rate of the first network device is the third level, and adjusting the preset waiting time delay of the first network device for forwarding the first data packet to the third waiting time delay. The third latency may be measured by the number of network devices in the transmission path having a level of bandwidth occupancy that is the first level. For example, if the level of the bandwidth occupancy of two network devices before the first network device is the first level, that is, two network devices before the first network device directly forward the first data packet to the next network device, the third latency of the first network device is 8ms +4ms — 12 ms. Wherein 8ms is an accumulated waiting time delay generated when two network devices before the first network device directly forward the first data packet, and 4ms is a preset waiting time delay for the first network device to forward the first data packet.
In a possible implementation manner, the control device may further determine, according to the number of network devices whose levels of the bandwidth occupancy rate after the first network device are the first level, the waiting delay of the first network device for forwarding the first data packet. For example, if there are two network devices with the first bandwidth occupancy level after the first network device, the control device may adjust the preset latency of 4ms for the first network device to forward the first data packet to the third latency of 12 ms.
The control device determines the waiting time delay of the network device for forwarding the first data packet according to the bandwidth occupancy rate of the network device, so that the network device with higher bandwidth occupancy rate can directly forward the first data packet downwards, the first data packet does not need to wait at the network device with higher bandwidth occupancy rate, and can wait at the network device with lower bandwidth occupancy rate, and further the time delays are complemented, thereby reducing the overtime of the time delay of forwarding the first data packet from the source device to the destination device caused by the overlong waiting time delay of the first data packet at the network device due to the overhigh bandwidth occupancy rate of a certain network device on a transmission path. The delay of forwarding the first data packet by the network device forwarding the first data packet is made to meet the deterministic delay requirement of the first data packet as much as possible.
In another case, if the resource information is the buffer capacities of the at least two network devices, the control device may determine the waiting delay for forwarding the first packet by each network device according to the total buffer capacities of the at least two network devices, the ratio of the buffer capacity of each network device to the total buffer capacity, and the preset total waiting delay.
The control device obtains the cache capacity of each network device, and accumulates the cache capacity of each network device to obtain the total cache capacity of at least two network devices.
For example, the control device may determine the waiting delay of the first network device for forwarding the first data packet according to a ratio of the buffer capacity of the first network device to the total buffer capacity, and a preset total waiting delay.
For example, if the buffer capacity of the first network device is 20, the total buffer capacity of at least two network devices is 100, and the preset total latency is 10ms, the latency of forwarding the first packet by the first network device is 20/100 × 10ms — 2 ms.
In a possible embodiment, the control device may determine the latency of each network device forwarding the first packet according to a ratio of the buffer capacities of two adjacent network devices.
When the number of network devices included in the transmission path is even, the latency delta of each network device forwarding the first data packetiCan be calculated from the following equations (2) and (3).
When the number of network devices included in the transmission path is odd, the latency of forwarding the first packet by each network device may be calculated by the following formula (4), formula (5), and formula (6).
Where n is the number of network devices in the transmission path, it can be understood that the transmission path includes a source device, a destination device, and at least two network devices. The source device only needs to send the first data packet, the destination device only needs to receive the first data packet, and the first data packet does not need to be processed, so that the first data packet does not need to wait at the source device and the destination device, and only the number of the network devices needs to be considered.
When the waiting delay calculated by the formula (6) is the waiting delay of the first data packet forwarded by the last network device when the number of the network devices is odd.
With reference to the communication system shown in fig. 1, if the transmission path includes a service device 101, a network device 102, a network device 103, a network device 104, and a service device 106. Take the service device 101 as a source device and the service device 106 as a destination device as an example. Since the service device 101 only needs to send the first data packet, the service device 106 only needs to receive the first data packet, and does not need to forward the first data packet, the network device that forwards the first data packet includes the network device 102, the network device 103, and the network device 104, and the number of the network devices that forward the first data packet is an odd number.
If the transmission path includes service device 101, network device 102, network device 103, network device 104, network device 105, and service device 106. Take the service device 101 as a source device and the service device 106 as a destination device as an example. Since the service device 101 only needs to send the first data packet and the service device 106106 only needs to receive the first data packet, the network devices forwarding the first data packet are the network device 102, the network device 103, the network device 104, and the network device 105, and the number of the network devices forwarding the first data packet is an even number.
If network devices with different cache capacities transmit data packets with the same waiting delay, the network device with a smaller cache capacity cannot process a large number of data packets in time when receiving the large number of data packets, which may cause the waiting delay of the data packets to be overtime. In this embodiment, the control device intelligently adjusts the waiting time delay for the network device to forward the first data packet according to the cache capacity of the network device. For example, the control device allocates the waiting delay to the network device with larger buffer capacity, which is larger than the waiting delay allocated to the network device with smaller buffer capacity, and the delays are complementary. The method and the device can avoid time delay overtime of the first data packet forwarded from the source device to the destination device caused by overlong queuing time of the first data packet when the network device with smaller cache capacity forwards the first data packet as much as possible, so that the time delay for forwarding the first data packet can meet the requirement of deterministic time delay of the first data packet as much as possible.
S205, the control device sends a control instruction to at least two network devices.
The control device may send a control instruction to each network device after determining the waiting delay for forwarding the first data packet by each network device according to the resource information of each network device, where the control instruction is used for forwarding the first data packet by each network device according to the indicated waiting delay.
The resource information of each network device is different, and the waiting time delay for forwarding the first data packet by each network device determined by the control device is also different, so that the control instruction sent by the control device to each network device is also different.
Illustratively, the control device may send control instructions to the first network device.
S206, at least two network devices receive the control instruction sent by the control device.
And S207, forwarding the first data packet by the at least two network devices according to the waiting time delay indicated by the control instruction.
Illustratively, the first network device may forward the first data packet according to a latency indicated by the control instruction.
Based on the embodiment shown in fig. 2, the control device intelligently adjusts the waiting time delay of the data packet at the network device according to the resource information of the network device, reasonably utilizes the resource of the network device, and avoids the time-out of the time delay of forwarding the data packet from the source device to the destination device as far as possible due to the overlong queuing time of the data packet when the network device forwards the data packet, so that the time delay of forwarding the data packet can meet the deterministic time delay requirement of the data packet as far as possible.
An improved time-sensitive network data transmission method proposed in the present application will be described below with reference to the communication system shown in fig. 1, where the total waiting time is assumed to be 16ms, taking resource information as the bandwidth occupancy of the network device as an example.
In a possible implementation manner, as shown in fig. 3, the control device may obtain resource information of each network device on the transmission path before the service device sends the first data packet, and further adjust the waiting time delay for each network device to forward the first data packet according to the resource information.
For example, if the level of the bandwidth occupancy of the network device 102 is the first level, the level of the bandwidth occupancy of the network device 103 is the first level, the level of the bandwidth occupancy of the network device 104 is the second level, and the level of the bandwidth occupancy of the network device 105 is the third level, the control device determines that the latency of the network device 102 is 0ms, the latency of the network device 103 is 0ms, the latency of the network device 104 is 4ms, and the latency of the network device 105 is 12 ms. The control device further sends a control instruction to the network device 102, the network device 103, the network device 104, and the network device 105, and the network device forwards the first data packet according to the indicated waiting delay. The 12ms latency of network device 105 makes up for the 8ms cumulative latency that is caused by network device 102 and network device 103 forwarding packets directly to the next network device, and the latencies are complementary.
In another possible implementation manner, as shown in fig. 4, if the total preset waiting delay is 16ms, the preset waiting delay for forwarding the first data packet by each network device is 4 ms. When the actual latency of forwarding the first data packet by a certain network device (for example, the network device 102) on the transmission path is overtime, the control device may adjust the latency of forwarding the first data packet by each network device that does not forward the first data packet according to the offset latency and the resource information of the network device that does not forward the first data packet.
For example, if the control device determines that the waiting time delay for forwarding the data packet by the network device 102 is overtime according to the time delay information sent by the network device 102, the control device obtains the bandwidth occupancy rates of the network device 103, the network device 104, and the network device 105. If the bandwidth occupancy of the network device 103 is the first level, the bandwidth occupancy of the network device 104 is the second level, and the bandwidth occupancy of the network device 105 is the third level. The control device sends a control instruction to the network device 103, the network device 104, and the network device 105, and adjusts the latency of the network device 103 from 4ms to 0ms, the network device 104 takes the preset latency of 4ms as the latency, and adjusts the latency of the network device 105 from 4ms to 6 ms. The latency 6ms of the network device 105 is a difference between the cumulative latency 4ms generated by directly forwarding the first data packet by the network device 103 and the latency 4ms of the network device 105 itself plus 8ms and the offset latency 2ms generated by forwarding the first data packet by the network device 102, which is 6 ms.
The above mainly introduces the scheme provided by the present application from the perspective of interaction between the nodes. It will be appreciated that each node, for example a control device, comprises corresponding hardware structures and/or software modules for performing each function in order to implement the above-described functions. Those of skill in the art will readily appreciate that the present invention can be implemented in hardware or a combination of hardware and computer software, in conjunction with the exemplary algorithm steps described in connection with the embodiments disclosed herein. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The present application may perform division of function modules on the control device according to the above method example, for example, each function module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. It should be noted that, the division of the modules in the present application is schematic, and is only a logical function division, and there may be another division manner in actual implementation.
Fig. 5 is a schematic diagram illustrating a communication apparatus according to an embodiment of the present disclosure. As shown in fig. 5, the communication apparatus 50 includes a processing unit 501, a receiving unit 502, and a transmitting unit 503. Optionally, the communication device 50 may further include a storage unit 504.
The communication device 50 may be a network device or a chip in a network device. When the communication device 50 is used to implement the functions of the control apparatus in the above-described embodiments, each unit is specifically used to implement the following functions.
A receiving unit 502, configured to obtain resource information of at least two network devices, where the resource information includes bandwidth occupancy rates and buffer capacities of the at least two network devices.
The processing unit 501 is configured to determine, according to the resource information, a waiting time delay for each network device to forward the first data packet.
The processing unit 501 is further configured to control each network device to forward the first data packet according to the indicated waiting delay.
Optionally, the processing unit 501 is specifically configured to: determining the bandwidth occupancy rate level of each network device according to the bandwidth occupancy rate and management information of each network device, wherein the management information is used for indicating the corresponding relation between the bandwidth occupancy rate range and the bandwidth occupancy rate level; and determining the waiting time delay of the first data packet forwarded by each network device according to the level of the bandwidth occupancy rate of each network device.
Optionally, the processing unit 501 is specifically configured to: if the level of the bandwidth occupancy rate of the first network device is a first level, adjusting a preset waiting time delay of the first network device for forwarding the first data packet to be a first waiting time delay, wherein the first waiting time delay is smaller than the preset waiting time delay, and the first network device is any one of at least two network devices; if the level of the bandwidth utilization rate of the first network equipment is a second level, taking the preset waiting time delay as a second waiting time delay for the first network equipment to forward the first data packet, wherein the second waiting time delay is equal to the preset waiting time delay, and the second level is smaller than the first level; if the level of the bandwidth utilization rate of the first network device is a third level, adjusting the preset waiting time delay of the first network device for forwarding the first data packet to be a third waiting time delay, wherein the third waiting time delay is greater than the preset waiting time delay, and the third level is less than the second level.
Optionally, the processing unit 501 is further configured to determine a preset waiting time delay for each network device to forward the first data packet according to the preset total waiting time delay and the number of the at least two network devices, where the preset total waiting time delay is used to indicate a waiting time for the at least two network devices to forward the first data packet.
Optionally, the receiving unit 502 is specifically configured to obtain a total cache capacity of at least two network devices.
The processing unit 501 is specifically configured to determine, according to a ratio of the cache capacity to the total cache capacity of each network device and a preset total waiting time delay, a waiting time delay for each network device to forward the first data packet, where the preset total waiting time delay is used to indicate a waiting time for at least two network devices to forward the first data packet.
Optionally, the sending unit 503 is configured to send a control instruction to each network device, where the control instruction is used to instruct each network device to forward the first data packet according to the instructed waiting delay.
Optionally, the storage unit 504 is configured to store resource information of at least two network devices.
The storage unit 504 is further configured to store the first data packet.
The storage unit 504 is further configured to store the determined latency of each network device for forwarding the first data packet.
The elements in fig. 5 may also be referred to as modules, for example, the processing elements may be referred to as processing modules. In addition, in the embodiment shown in fig. 5, the names of the respective units may not be the names shown in the figure, and for example, the transmitting unit may also be referred to as a communication unit.
The respective units in fig. 5, if implemented in the form of software functional modules and sold or used as separate products, may be stored in a computer-readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application may be essentially implemented or make a contribution to the prior art, or all or part of the technical solutions may be implemented in the form of a software product stored in a storage medium, and including several instructions to enable a computer device (which may be a personal computer, a server, a network device, or the like) or a processor (processor) to execute all or part of the steps of the methods of the embodiments of the present application. A storage medium storing a computer software product comprising: various media capable of storing program codes, such as a usb disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The embodiment of the present application further provides a schematic diagram of a hardware structure of a communication device, as shown in fig. 6, the communication device 60 includes a processor 11, and optionally, further includes a memory 12 and a communication interface 13, which are connected to the processor 11. The processor 11, the memory 12 and the communication interface 13 are connected by a bus 14.
The processor 11 may be a Central Processing Unit (CPU), a general purpose processor Network (NP), a Digital Signal Processor (DSP), a microprocessor, a microcontroller, a Programmable Logic Device (PLD), or any combination thereof. The processor may also be any other means having a processing function such as a circuit, device or software module. The processor 11 may also include a plurality of CPUs, and the processor 11 may be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor. A processor herein may refer to one or more devices, circuits, or processing cores that process data (e.g., computer program instructions).
In the embodiment of the present application, the processor 11 may be used to implement the functions of the processing unit 501 in the communication device 50. Illustratively, the processor 11 is configured to determine a bandwidth occupancy level of each network device according to the bandwidth occupancy of each network device and management information, where the management information is used to indicate a corresponding relationship between a bandwidth occupancy range and the bandwidth occupancy level; and determining the waiting time delay of the first data packet forwarded by each network device according to the level of the bandwidth occupancy rate of each network device.
Alternatively, the schematic structural diagram shown in fig. 6 may be used to illustrate the structure of the control device in the above embodiment. The processor 11 is used for controlling and managing the action of the control device. The processor 11 may communicate with other devices, for example with network devices, via the communication interface 13. The memory 12 is used for storing program codes and data of the control device, for example, resource information of at least two network devices may be stored.
The bus 14 may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The bus 14 may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 6, but this is not intended to represent only one bus or type of bus.
Embodiments of the present application also provide a computer-readable storage medium, which includes computer-executable instructions, which, when executed on a computer, cause the computer to perform any one of the methods described above.
Embodiments of the present application also provide a computer program product comprising computer executable instructions, which when run on a computer, cause the computer to perform any of the above methods.
An embodiment of the present application further provides a chip, including: a processor coupled to the memory through the interface, and an interface, when the processor executes the computer program or the computer execution instructions in the memory, the processor causes any one of the methods provided by the above embodiments to be performed.
In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented using a software program, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer-executable instructions. The processes or functions described in accordance with the embodiments of the present application occur, in whole or in part, when computer-executable instructions are loaded and executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer executable instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, the computer executable instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). Computer-readable storage media can be any available media that can be accessed by a computer or can comprise one or more data storage devices, such as servers, data centers, and the like, that can be integrated with the media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.
While the present application has been described in connection with various embodiments, other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed application, from a review of the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the word "a" or "an" does not exclude a plurality. A single processor or other unit may fulfill the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.
Although the present application has been described in conjunction with specific features and embodiments thereof, it will be evident that various modifications and combinations can be made thereto without departing from the spirit and scope of the application. Accordingly, the specification and figures are merely exemplary of the present application as defined in the appended claims and are intended to cover any and all modifications, variations, combinations, or equivalents within the scope of the present application. It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
The above description is only an embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. An improved time-sensitive network data transmission method, wherein a control device is connected to at least two network devices, said at least two network devices being configured to forward a first data packet, the method being performed by the control device, the method comprising:
acquiring resource information of the at least two network devices, wherein the resource information comprises bandwidth occupancy rates and buffer capacities of the at least two network devices;
determining the waiting time delay of each network device for forwarding the first data packet according to the resource information;
and controlling each network device to forward the first data packet according to the indicated waiting time delay.
2. The method of claim 1, wherein if the resource information is the bandwidth occupancy of the at least two network devices, determining the latency for each of the network devices to forward the first packet according to the resource information comprises:
determining the bandwidth occupancy rate level of each network device according to the bandwidth occupancy rate of each network device and management information, wherein the management information is used for indicating the corresponding relation between the bandwidth occupancy rate range and the bandwidth occupancy rate level;
and determining the waiting time delay of the first data packet forwarded by each network device according to the level of the bandwidth occupancy rate of each network device.
3. The method of claim 2, wherein determining the latency for forwarding the first packet by each of the network devices based on the level of bandwidth occupancy of each of the network devices comprises:
if the level of the bandwidth occupancy rate of the first network device is a first level, adjusting a preset waiting time delay of the first network device for forwarding the first data packet to be a first waiting time delay, wherein the first waiting time delay is smaller than the preset waiting time delay, and the first network device is any one of the at least two network devices;
if the level of the bandwidth utilization rate of the first network device is a second level, taking the preset waiting time delay as a second waiting time delay for the first network device to forward the first data packet, wherein the second waiting time delay is equal to the preset waiting time delay, and the second level is smaller than the first level;
if the level of the bandwidth utilization rate of the first network device is a third level, adjusting the preset waiting time delay of the first network device for forwarding the first data packet to be a third waiting time delay, wherein the third waiting time delay is greater than the preset waiting time delay, and the third level is smaller than the second level.
4. The method of claim 3, wherein prior to determining the level of bandwidth occupancy of each of the network devices based on the bandwidth occupancy and the management information of each of the network devices, the method further comprises:
and determining the preset waiting time delay for each network device to forward the first data packet according to the preset waiting total time delay and the number of the at least two network devices, wherein the preset waiting total time delay is used for indicating the waiting time for the at least two network devices to forward the first data packet.
5. The method of claim 1, wherein if the resource information is the buffer capacity of the at least two network devices, determining the waiting delay for each of the network devices to forward the first packet according to the resource information comprises:
acquiring the total cache capacity of the at least two network devices;
and determining the waiting time delay for forwarding the first data packet by each network device according to the proportion of the cache capacity of each network device to the total cache capacity and the preset waiting total time delay, wherein the preset waiting total time delay is used for indicating the waiting time for forwarding the first data packet by the at least two network devices.
6. The method according to any of claims 1-5, wherein said controlling each of said network devices to forward said first packet according to an indicated latency comprises:
and sending a control instruction to each network device, wherein the control instruction is used for instructing each network device to forward the first data packet according to the instructed waiting time delay.
7. A communications apparatus, comprising:
a receiving unit, configured to obtain resource information of at least two network devices, where the resource information includes bandwidth occupancy rates and buffer capacities of the at least two network devices;
the processing unit is used for determining the waiting time delay of the first data packet forwarded by each network device according to the resource information;
and the processing unit is further used for controlling each network device to forward the first data packet according to the indicated waiting time delay.
8. A communication device, comprising: a processor and a memory;
the memory stores instructions executable by the processor;
the processor is configured to, when executing the instructions, cause the communication device to implement the method of any of claims 1-6.
9. A communication system comprising a control device and at least two network devices;
the control device is configured to perform the method of any of the preceding claims 1-6 to control the at least two network devices to forward the first data packet according to the indicated latency.
10. A computer-readable storage medium comprising computer instructions which, when executed on a computer, cause the computer to perform the method of any one of claims 1-6.
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