CN114070776B - 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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- CN114070776B CN114070776B CN202111290482.5A CN202111290482A CN114070776B CN 114070776 B CN114070776 B CN 114070776B CN 202111290482 A CN202111290482 A CN 202111290482A CN 114070776 B CN114070776 B CN 114070776B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
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- H04L45/125—Shortest path evaluation based on throughput or bandwidth
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 control equipment obtains resource information (such as bandwidth occupancy rate and/or buffer capacity) of at least two network equipment, and after waiting time delay for each network equipment to forward a first data packet is determined according to the resource information, each network equipment is controlled to forward the first data packet according to the indicated waiting time delay. The control device intelligently controls the waiting time delay of the network device for forwarding the first data packet according to the resource information of the network device, so that the time delay timeout of the data packet forwarded from the source device to the destination device caused by overlong queuing time of the data packet forwarded by the network device is avoided as much as possible, and the time delay of the forwarded data packet can meet the deterministic time delay requirement of the data packet as much as possible.
Description
Technical Field
The present disclosure relates to the field of communications, and in particular, to an improved method, apparatus, and device for transmitting data in a time-sensitive network.
Background
A time sensitive network (time sensitive networking, TSN) is a networking mechanism defined on an ethernet basis that supports data with deterministic latency, low jitter, and zero packet loss rate for increasing the certainty and reliability of the ethernet.
Typically, the network device takes the time sequence in which the packets are received as the sequence in which the packets are forwarded. For example, when the network device receives the first data packet at the first time and receives the second data packet at the second time, the network device forwards the first data packet first and then forwards the second data packet. For the data packet with deterministic delay requirement, if queuing forwarding is performed according to the time sequence of first-come and then-come last-come, the delay time of forwarding the data packet by the network device on the path of transmitting the data packet between the source device and the 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 deterministic delay requirement of the data packet as much as possible is a 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 deterministic time delay requirement of the data packet as far as possible.
In order to achieve the above purpose, the following technical scheme is adopted in the application.
In a first aspect, an improved time-sensitive network data transmission method is provided, where the method includes a control device obtaining resource information (e.g., bandwidth occupancy and/or buffer capacity) of at least two network devices, determining a latency for forwarding a first data packet by each network device according to the resource information, and controlling each network device to forward the first data packet according to the indicated latency.
The control device intelligently controls the waiting time delay of the network device for forwarding the first data packet according to the resource information of the network device, so that the time delay timeout of the data packet forwarded from the source device to the destination device caused by the overlong queuing time of the data packet when the network device forwards the data packet is avoided as far as possible, and the time delay of the forwarded data packet meets the time delay requirement of the data packet as far as possible.
In one possible implementation manner, if the resource information is bandwidth occupancy rate of at least two network devices, determining, according to the resource information, a waiting delay of forwarding the first data packet by each network device includes: the control device determines a level of bandwidth occupancy of each network device according to the bandwidth occupancy of each network device and the management information. And determining the waiting time delay of each network device for forwarding the first data packet according to the level of the bandwidth occupancy rate 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 rate of the first network device is the first level, the preset latency of forwarding the first data packet by the first network device is adjusted to be the first latency, the first latency is smaller than the preset latency, 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 a second level, the preset latency is used as a second latency for forwarding the first data packet by the first network device, the second latency is equal to the preset latency, 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 latency of forwarding the first data packet by the first network device is adjusted to be a third latency, where the third latency is greater than the preset latency, and the third level is less than the second level.
The control device may determine a preset latency for forwarding the first data packet by each network device according to the preset total latency and the number of at least two network devices. The preset waiting total time delay is used for indicating waiting time length for forwarding the first data packet by at least two network devices.
The level of the bandwidth occupancy rate of the network device may be understood as the busyness of the network device, 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 relatively busyness, and the waiting time delay of forwarding the first data packet by the network device may be reduced, so that the network device forwards the first data packet as soon as possible, and the queuing time of the first data packet at the network device is avoided being too long. If the level of bandwidth occupancy of the network device is the second level, it can be appreciated that the level of busyness 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 can wait for more than one time at the network device, so that the network device forwards other data packets waiting at the network device, and delay timeout of forwarding the data packets between the source device and the destination device caused by too long queuing time of the data packets when the network device with too high bandwidth occupancy rate forwards the data packets is avoided as far as possible, so that the delay of forwarding the data packets meets the deterministic delay requirement of the data packets as far as possible.
In another possible implementation manner, if the resource information is the buffer capacity of at least two network devices, determining, according to the resource information, a waiting delay of forwarding the first data packet by each network device includes: the control equipment acquires the total cache capacity of at least two network equipment; and determining the waiting time delay of forwarding the first data packet by each network device according to the ratio of the buffer capacity to the total buffer 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 length of forwarding the first data packet by at least two network devices.
If network devices with different buffer capacities adopt the same waiting time delay to transmit data packets, the network devices with smaller buffer capacities cannot process a large number of data packets in time when receiving the large number of data packets, which may cause the waiting time 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 buffer capacity of the network device. For example, the control device allocates a larger latency to the network device with a larger cache capacity than to the network device with a smaller cache capacity, and the latency is complementary. The time delay timeout of forwarding the first data packet from the source device to the destination device caused by overlong queuing time of the first data packet when the network device with smaller buffer capacity forwards the first data packet can be avoided as far as possible, so that the time delay of forwarding the first data packet meets the deterministic time delay requirement of the first data packet as far as possible.
In one possible implementation, controlling each network device to forward the first data packet according to the indicated latency 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 indicated waiting time delay. Each network device forwards the first data packet according to the indicated waiting time delay, wherein the indicated waiting time delay is the waiting time delay after the control device adjusts according to the resource information of the network device, so that the time delay timeout of the first data packet on a path for transmitting the first data packet caused by the waiting time delay timeout of the first data packet at a certain network device is reduced, and the time delay for forwarding the first data packet meets the deterministic time delay requirement of the first data packet as far as possible.
In a second aspect, a communication apparatus is provided, where the apparatus includes a receiving unit and a processing unit, where the receiving unit is configured to obtain resource information of at least two network devices, where the resource information includes bandwidth occupancy rate and buffer capacity 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 also used for controlling each network device to forward the first data packet according to the indicated waiting time delay.
In one possible implementation manner, if the resource information is bandwidth occupancy of at least two network devices, the processing unit is specifically configured to: determining the level of the bandwidth occupancy rate 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 each network device for forwarding the first data packet according to the level of the bandwidth occupancy rate of each network device.
In one possible implementation, 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 the preset waiting time delay for forwarding the first data packet by the first network device 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 network device of 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 for forwarding the first data packet by the first network device to be a third waiting time delay, wherein the third waiting time delay is larger than the preset waiting time delay, and the third level is smaller than the second level.
In one possible implementation manner, the processing unit is further configured to determine a preset latency of forwarding the first data packet by each network device according to a preset total latency and a number of at least two network devices, where the preset total latency is used to indicate a latency period of forwarding the first data packet by the at least two network devices.
In one possible implementation manner, if the resource information is the cache capacity of at least two network devices, the receiving unit is specifically configured to obtain the total cache capacity of the at least two network devices; the processing unit is specifically configured to determine a waiting time delay of forwarding the first data packet by each network device according to a ratio of a buffer capacity to a total buffer capacity of each network device and a preset waiting total time delay, where the preset waiting total time delay is used to indicate a waiting time period of forwarding the first data packet by at least two network devices.
In a possible implementation manner, the apparatus further includes a sending unit, configured to send a control instruction to each network device, where the control instruction is configured to instruct each network device to forward the first data packet according to the indicated latency.
In a third aspect, there is provided 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 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, there is provided a computer readable storage medium storing computer instructions that, when run on a computer, cause the computer to perform any one of the methods provided in the first aspect.
In a sixth aspect, there is provided a computer program product containing computer instructions which, when run on a computer, cause the computer to perform any of the methods provided in the first aspect.
Technical effects caused by any possible implementation manners of the second aspect to the sixth aspect may be related to technical effects caused by corresponding implementation manners of the first aspect, which are not described herein.
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 and do not 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 flow chart of an improved data transmission method of a time-sensitive network 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 of a communication device according to an embodiment of the present application;
fig. 6 is a schematic hardware structure of a communication device according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
In the embodiments of the present application, in order to facilitate the clear description of the technical solutions of the embodiments of the present application, the words "first", "second", etc. are used to distinguish the same item or similar items having substantially the same function and effect. It will be appreciated by those of skill in the art that the words "first," "second," and the like do not limit the amount and order of execution, and that the words "first," "second," and the like do not necessarily differ. The technical features described in the first and second descriptions are not sequential or in order of magnitude.
In the embodiments of the present application, words such as "exemplary" or "such as" are used to mean serving as examples, illustrations, or descriptions. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion that may be readily understood.
In the description of the present application, unless otherwise indicated, "/" means that the associated object is an "or" relationship, e.g., a/B may represent a or B; the term "and/or" in this application is merely an association relation describing an association object, and means that three kinds of relations may exist, for example, a and/or B may mean: there are three cases, a alone, a and B together, and B alone, wherein a, B may be singular or plural. Also, in the description of the present application, unless otherwise indicated, "a plurality" means two or more than two. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). 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 plural.
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 this application.
According to the improved time-sensitive network data transmission method provided by the embodiment of the application, the resource information of the network equipment on the transmission path for transmitting the data packet from end to end is taken as a basis for consideration, 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 method, apparatus and device for transmitting time-sensitive network data according to 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, the communication system 10 includes a control device 100, service devices (such as service device 101 and service device 106 shown in fig. 1), and 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. The service device 101 is connected to the network device 102, the network device 102 is connected to the network device 103, the network device 103 is connected to the network device 104, the network device 104 is connected to the network device 105, and the network device 105 is connected to the service device 106.
The control device 100 may be a stand-alone physical device such as a server or computer or the like. It may also 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. But may also be part of a network device, and this is not a limitation of the present application.
The control device 100 is configured to determine a latency of forwarding a data packet by each network device 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 named differently, such as User Equipment (UE), access terminal, terminal unit, terminal station, mobile station, remote terminal, mobile device, wireless communication device, terminal agent, or terminal apparatus, etc. If the service device 101 transmits a data packet as a source device, the service device 106 receives the data packet as a destination device. If the service device 106 transmits a data packet as a source device, the service device 101 receives the data packet as a destination device. The network device may be a switch or router, etc. The switch may be a switch supporting VLAN and three-layer switching techniques. In the embodiment of the application, the network device may receive the control instruction sent by the control device, and forward the data packet according to the waiting time delay indicated by the control instruction.
It should be appreciated that fig. 1 is an exemplary architecture diagram and that the number of devices included in the communication system shown in fig. 1 is not limited. In addition, the communication system shown in fig. 1 may include other devices in addition to the devices shown in fig. 1, and is not limited thereto.
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 the data packet with deterministic requirement on the delay of forwarding the data packet, before the service device is used as the source device to send the data packet, the service device can send request information to the control device, wherein the request information comprises the address of the source device, the address of the destination device, the identification of the first data packet and the preset waiting total 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 business device 101 shown in fig. 1 and the destination device may be the business device 106 shown in fig. 1.
The identification of the first data packet may be used to uniquely indicate the first data packet, for example, may be the name of the first data packet, etc. It will be appreciated that the identification of the different data packets indicates the 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 data packet may be any one of a plurality of data 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 period 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 may be preset by a manager. The pre-set total latency for different data packets may be different.
It should be noted that, the end-to-end deterministic delay T of the data packet from the source device to the destination device includes a switching delay T SF Time delay T of transmission QL Line transmission delay T WL And latency delta, switching latency T SF Time delay T of transmission QL And line transmission delay T WL Belonging to network delay time and waitingThe delay delta is understood to be the processing delay of the data packet by the network device, and can be controlled. In the embodiment of the present application, a waiting total delay, that is, 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 a preset total latency.
In general, a plurality of transmission paths exist for transmitting a packet between a source device and a destination device, and a control device may select one transmission path from the plurality of transmission paths. For example, the transmission path may be one of the transmission paths in which the number of network devices is the smallest, or may be one of the transmission paths in which the number of network devices is the smallest.
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 a preset latency for forwarding the first data packet by each network device according to the preset total latency and the number of at least two network devices included in the transmission path. The preset waiting time delay is the time delay requirement of forwarding the first data packet for each network device.
For example, if the total latency of the preset latency is 16 milliseconds (ms), and the transmission path includes 4 network devices, the preset latency is 4ms, which represents that any one of 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 a waiting time delay for the network devices to forward 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 and then transmits delay information to the control equipment, 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 of the network equipment which forwards the first data packet is overtime, the control equipment acquires the resource information of the network equipment which does not forward the first data packet, and adjusts the waiting time delay of the network equipment which does not forward the first data packet.
The resource information includes bandwidth occupancy (which may be referred to as a busy level) and buffering capacity of each network device. The bandwidth occupancy rate of each network device may be calculated by the following formula (1).
Wherein, the liquid crystal display device comprises a liquid crystal display device,
for the bandwidth occupancy of the ith network device of the at least two network devices, +.>
For the number of bytes received per second by the ith network device, etc.)>
B for the number of bytes sent per second by the ith network device i Is the bandwidth of the i-th network device.
The buffer capacity can be divided into an inherent buffer capacity and an available buffer capacity. The inherent buffer capacity is the storage capacity of the network device after the manufacture is completed, for example, the memory of a mobile phone is 64 gigabits (G), and 64G is the inherent buffer capacity. Available buffer capacity refers to the buffer capacity currently available to the network device. In the embodiment of the present application, the buffer capacity may be an inherent buffer capacity of the network device, or may be an available buffer capacity of the network device.
S204, the control equipment determines the waiting time delay of each network equipment for forwarding the first data packet according to the resource information.
The control device determining the latency of each network device to forward the first data packet may include the following scenarios.
In one case, if the resource information is the bandwidth occupancy rate of at least two network devices, the control device may determine, according to the bandwidth occupancy rate and the management information of each network device, a waiting delay of 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
If the bandwidth occupancy rate of the network device is less than or equal to 40%, the network device is idle, and the bandwidth occupancy rate level is a third level. If the bandwidth occupancy rate of any network device is greater than 40% and less than 80%, it means that the processing capability of the network device is in 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 means that the network device is busy, the processing capacity will reach the processing limit of the network device, and the bandwidth occupancy rate level is the first level.
In the following, it is assumed that the at least two network devices comprise a first network device, which may be any one of the at least two network devices, for example by forwarding the first data packet by the first network device. Illustratively, the first network device may be network device 102 in fig. 1.
The control device may determine, according to the bandwidth occupancy of the first network device, a latency of forwarding the first data packet by the first network device, where the latency may include the following.
In case 1, if the level of the bandwidth occupancy rate of the first network device is the first level, adjusting the preset waiting time delay for forwarding the first data packet by the first network device to be the first waiting time delay, where 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 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 3, if the level of the bandwidth occupancy rate of the first network device is the third level, adjusting the preset waiting time delay for forwarding the first data packet by the first network device to be the third waiting time delay, wherein the third waiting time delay is larger than the preset waiting time delay.
For example, if the preset total latency is 16ms, the transmission path includes 4 network devices, and the preset latency is 4ms.
If the bandwidth occupancy rate of the first network device is 90%, it may be understood that the first network device is currently busy, the current processing capability of the first network device will reach the limit of the processing capability of the first network device, and comparing the above table 1, determining that the level of the bandwidth occupancy rate of the first network device is the first level may adjust the preset latency of forwarding the first data packet by the first network device to be the first latency 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 rate 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 is within the processing capability of the first network device. Comparing with table 1, it is determined that the level of the bandwidth occupancy of the first network device is the second level, and the preset waiting delay of 4ms for forwarding the first data packet by the first network device may be used as the second waiting delay of 4ms for forwarding the first data packet by the first network device.
If the bandwidth occupancy rate of the first network device is 20%, it can be understood that the first network device is currently idle, and the first data packet can be more waited at the first network device, so as to relieve the pressure of other network devices in the transmission path. Comparing with table 1, determining that the level of the bandwidth occupancy rate of the first network device is the third level, and adjusting the preset waiting time delay for forwarding the first data packet by the first network device to the third waiting time delay. The third latency may be measured by the number of network devices in the transmission path having a first level of bandwidth occupancy. For example, if the first network device is preceded by two network devices with a first level of bandwidth occupancy, i.e., the first network device is preceded by two network devices forwarding the first data packet directly 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 by two network devices before the first network device to 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 one possible implementation manner, the control device may further determine a latency of forwarding the first data packet by the first network device according to the number of network devices with the level of the bandwidth occupancy rate being the first level after the first network device. For example, if there are two network devices with the level of the bandwidth occupancy rate being the first level after the first network device, the control device may adjust the preset latency 4ms for forwarding the first data packet by the first network device to be the third latency 12ms.
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, further the time delay is complementary, and the time delay overtime of forwarding the first data packet between the source device and the destination device due to the fact that the waiting time delay of the first data packet at the network device is too long caused by too high bandwidth occupancy rate of a certain network device on a transmission path is reduced. The time delay of the network equipment for forwarding the first data packet can meet the deterministic time delay requirement of the first data packet as far as possible.
In another case, if the resource information is the buffer capacity of at least two network devices, the control device may determine the waiting delay of forwarding the first data packet by each network device according to the total buffer capacity of at least two network devices, according to the ratio of the buffer capacity to the total buffer capacity of each network device, and the preset waiting total delay.
The control device obtains the cache capacity of each network device, and accumulates the cache capacity of each network device, so as to obtain the total cache capacity of at least two network devices.
For example, the control device may determine the latency of forwarding the first data packet by the first network device according to a ratio of the buffer capacity to the total buffer capacity of the first network device and a preset latency.
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 waiting delay is 10ms, the waiting delay for forwarding the first data packet by the first network device is 20/100×10ms=2ms.
In one possible embodiment, the control device may determine the latency of forwarding the first data packet by each network device according to the ratio of the buffer capacities of the two adjacent network devices.
When the number of network devices included in the transmission path is even, each network device forwards the waiting delay delta of the first data packet i Can be calculated from the following formula (2) and formula (3).
When the number of network devices included in the transmission path is an odd number, the latency of forwarding the first data packet by each network device may be calculated by the following equations (4), (5) and (6).
Where n is the number of network devices in the transmission path, it will be appreciated 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 network devices is considered.
And (3) when the waiting time delay calculated by the formula (6) is an odd number of network devices, forwarding the waiting time delay of the first data packet by the last network device.
In connection with the communication system shown in fig. 1, if the transmission path includes the service device 101, the network device 102, the network device 103, the network device 104, and the service device 106. The service device 101 is taken as a source device, and the service device 106 is taken 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 devices forwarding the first data packet include the network device 102, the network device 103, and the network device 104, and the number of network devices forwarding 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. The service device 101 is taken as a source device, and the service device 106 is taken 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 devices 102, 103, 104, and 105, and the number of network devices forwarding the first data packet is even.
If network devices with different buffer capacities adopt the same waiting time delay to transmit data packets, the network devices with smaller buffer capacities cannot process a large number of data packets in time when receiving the large number of data packets, which may cause the waiting time delay of the data packets to be overtime. In this embodiment, the control device intelligently adjusts the latency of the network device for forwarding the first data packet according to the buffer capacity of the network device. For example, the control device allocates a larger latency to the network device with a larger cache capacity than to the network device with a smaller cache capacity, and the latency is complementary. The time delay timeout of forwarding the first data packet from the source device to the destination device caused by overlong queuing time of the first data packet when the network device with smaller buffer capacity forwards the first data packet can be avoided as far as possible, so that the time delay of forwarding the first data packet meets the deterministic time delay requirement of the first data packet as far as possible.
S205, the control device sends control instructions to at least two network devices.
After the control device determines the waiting time delay of each network device for forwarding the first data packet according to the resource information of each network device, the control device can send a control instruction to each network device, wherein the control instruction is used for each network device to forward the first data packet according to the indicated waiting time delay.
The resource information of each network device is different, and the waiting time delay of each network device for forwarding the first data packet 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.
For example, 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.
S207, at least two network devices forward the first data packet according to the waiting time delay indicated by the control instruction.
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 delay timeout of forwarding the data packet from the source device to the destination device caused by overlong queuing time of the data packet when the network device forwards the data packet as much as possible, thereby enabling the time delay of forwarding the data packet to meet the deterministic time delay requirement of the data packet as much as possible.
An improved method for transmitting data in a time-sensitive network according to the present application will be illustrated with reference to the communication system shown in fig. 1, where, taking the bandwidth occupancy rate of the network device as resource information as an example, the total waiting delay is preset to be 16ms.
In one possible implementation manner, as shown in fig. 3, before the service device sends the first data packet, the control device may acquire resource information of each network device on the transmission path, and further adjust a waiting delay of forwarding the first data packet by each network device according to the resource information.
For example, if the level of bandwidth occupancy of the network device 102 is the first level, the level of bandwidth occupancy of the network device 103 is the first level, the level of bandwidth occupancy of the network device 104 is the second level, and the level of 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 12ms. And the control device sends control instructions 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 time delay. The latency of 12ms of the network device 105 compensates for the cumulative latency of 8ms, which is generated by the network device 102 and the network device 103 forwarding the data packet directly to the next network device, and the latency is complementary.
In another possible implementation, as shown in fig. 4, if the total preset latency is 16ms, the preset latency for forwarding the first data packet by each network device is 4ms. When the actual waiting time delay of a network device (for example, the network device 102) on the transmission path for forwarding the first data packet is overtime, the control device may adjust the waiting time delay of each network device that does not forward the first data packet for forwarding the first data packet according to the deviation waiting time delay 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 latency of forwarding the data packet by the network device 102 is timeout according to the latency 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 at the first level, the bandwidth occupancy of the network device 104 is at the second level, and the bandwidth occupancy of the network device 105 is at the third level. The control device sends control instructions to the network device 103, the network device 104 and the network device 105, the latency of the network device 103 is adjusted from 4ms to 0ms, the network device 104 uses the preset latency of 4ms as the latency, and the latency of the network device 105 is adjusted from 4ms to 6ms. The latency of the network device 105 is a sum of 4ms of the accumulated latency generated by the network device 103 directly forwarding the first data packet and 4ms of the latency of the network device 105 itself, and 8ms of the difference between the accumulated latency and the offset latency generated by the network device 102 forwarding the first data packet is 2ms, which is 6ms.
The above description has been presented mainly in terms of interaction between the nodes. It will be appreciated that each node, e.g. the control device, in order to implement the above-described functions, comprises corresponding hardware structures and/or software modules performing each function. Those of skill in the art will readily appreciate that the various illustrative algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is implemented as hardware or computer software driven 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 divide the functional modules of the control device according to the above method example, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated in one processing module. The integrated modules may be implemented in hardware or in software functional modules. It should be noted that the division of the modules in this application is illustrative, and is merely a logic function division, and other division manners may be implemented in practice.
Fig. 5 shows a schematic composition diagram of a communication device according to an embodiment of the present application. 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 comprise a storage unit 504.
The communication means 50 may be a network device or a chip in a network device. When the communication device 50 is used to realize the functions of the control apparatus in the above-described embodiment, each unit is specifically used to realize the following functions.
The receiving unit 502 is configured to obtain resource information of at least two network devices, where the resource information includes bandwidth occupancy rate and buffer capacity of the at least two network devices.
The processing unit 501 is configured to determine a latency of forwarding the first data packet by each network device according to the resource information.
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 level of the bandwidth occupancy rate 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 each network device for forwarding the first data packet 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 the preset waiting time delay for forwarding the first data packet by the first network device 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 network device of 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 for forwarding the first data packet by the first network device to be a third waiting time delay, wherein the third waiting time delay is larger than the preset waiting time delay, and the third level is smaller than the second level.
Optionally, the processing unit 501 is further configured to determine a preset latency of forwarding the first data packet by each network device according to a preset total latency and the number of at least two network devices, where the preset total latency is used to indicate a latency period of forwarding the first data packet by the at least two network devices.
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 a waiting delay of forwarding the first data packet by each network device according to a ratio of a buffer capacity to a total buffer capacity of each network device and a preset total waiting delay, where the preset total waiting delay is used to indicate a waiting duration of forwarding the first data packet by at least two network devices.
Optionally, the sending unit 503 is configured to send a control instruction to each network device, where the control instruction is configured to instruct each network device to forward the first data packet according to the indicated 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 forwarding the first data packet by each network device.
The units in fig. 5 may also be referred to as modules, e.g., the processing units may be referred to as processing modules. In addition, in the embodiment shown in fig. 5, the names of the respective units may be other than those shown in the drawing, and for example, the transmitting unit may also be referred to as a communication unit.
The individual units in fig. 5 may be stored in a computer-readable storage medium if implemented in the form of software functional modules and sold or used as separate products. Based on such understanding, the technical solution of the embodiments of the present application may be essentially or a part contributing to the prior art or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium, including several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to perform all or part of the steps of the methods of the embodiments of the present application. The storage medium storing the computer software product includes: a U-disk, a removable hard disk, a read-only memory (ROM), a random access memory (random access memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The embodiment of the application also provides a schematic hardware structure of a communication device, as shown in fig. 6, where the communication device 60 includes a processor 11, and optionally, a memory 12 and a communication interface 13 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 (central processing unit, CPU), a general purpose processor network processor (network processor, NP), a digital signal processor (digital signal processing, DSP), a microprocessor, a microcontroller, a programmable logic device (programmable logic device, PLD), or any combination thereof. The processor may also be any other means for performing 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 for processing data (e.g., computer program instructions).
In the present embodiment, the processor 11 may be configured to implement the functions of the processing unit 501 in the communication device 50. Illustratively, the processor 11 is configured to determine a level of bandwidth occupancy of each network device according to bandwidth occupancy of each network device and management information, where the management information is used to indicate a correspondence between a bandwidth occupancy range and the level of bandwidth occupancy; and determining the waiting time delay of each network device for forwarding the first data packet according to the level of the bandwidth occupancy rate of each network device.
Alternatively, the structural diagram shown in fig. 6 may be used to illustrate the structure of the control apparatus involved in the above-described embodiment. The processor 11 is used for controlling and managing the actions of the control device. The processor 11 may communicate with other devices, such as with network devices, via a 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 memory 12 may be a read-only memory (ROM) or other type of static storage device that may store static information and instructions, a random access memory (random access memory, RAM) or other type of dynamic storage device that may store information and instructions, or an electrically erasable programmable read-only memory (electrically erasable programmable read-only memory, EEPROM), a compact disc read-only memory (compact disc read-only memory) or other optical disk storage, optical disk storage (including compact disc, laser disc, optical disc, digital versatile disc, blu-ray disc, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, as the embodiments of the present application are not limited in this regard. The memory 12 may be independent or may be integrated with the processor 11. Wherein the memory 12 may contain computer program code. The processor 11 is configured to execute computer program code stored in the memory 12, thereby implementing the methods provided by the embodiments of the present application. The communication interface 13 may be used to communicate with other devices or communication networks (e.g., ethernet, radio access network (radio access network, RAN), wireless local area network (wireless local area networks, WLAN), etc.). The communication interface 13 may be a module, a circuit, a transceiver, or any device capable of enabling communication.
Embodiments of the present application also provide a computer-readable storage medium comprising computer-executable instructions that, when run on a computer, cause the computer to perform any 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 methods described above.
The embodiment of the application also provides a chip, which comprises: a processor and an interface through which the processor is coupled to the memory, which when executed by the processor executes a computer program or computer-executable instructions in the memory, cause any of the methods provided by the embodiments described above to be performed.
In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using a software program, it 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. When the computer-executable instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present application are produced in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer-executable instructions may be stored in or transmitted from one computer-readable storage medium to another, for example, from one website, computer, server, or data center by wired (e.g., coaxial cable, fiber optic, digital subscriber line (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 data storage devices including one or more servers, data centers, etc. that can be integrated with the media. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a Solid State Disk (SSD)), or the like.
Although the present application has been described herein 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 figures, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the "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 connection with specific features and embodiments thereof, it will be apparent that various modifications and combinations can be made without departing from the spirit and scope of the application. Accordingly, the specification and drawings are merely exemplary illustrations of the present application as defined in the appended claims and are considered to cover any and all modifications, variations, combinations, or equivalents that fall within the scope of the present application. It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.
The foregoing is merely a specific embodiment of the present application, but the protection 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 in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (8)
1. An improved time-sensitive network data transmission method, characterized in that a control device connects at least two network devices for forwarding 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 rate and buffer capacity 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;
controlling each network device to forward the first data packet according to the indicated waiting time delay;
if the resource information is the bandwidth occupancy rate of the at least two network devices, determining a waiting delay of forwarding the first data packet by each network device according to the resource information, including:
Determining the level of the bandwidth occupancy rate 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;
determining the waiting time delay of forwarding the first data packet by each network device according to the level of the bandwidth occupancy rate of each network device;
the determining the waiting time delay of each network device for forwarding the first data packet according to the level of the bandwidth occupancy rate of each network device includes:
if the level of the bandwidth occupancy rate of the first network device is a first level, adjusting a preset waiting time delay for forwarding the first data packet by the first network device 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 network device of the at least two network devices;
if the level of the bandwidth utilization rate of the first network device is a second level, the preset waiting time delay is used as a second waiting time delay for forwarding the first data packet by the first network device, the second waiting time delay is equal to the preset waiting time delay, and the second level is smaller than the first level;
And if the level of the bandwidth utilization rate of the first network device is a third level, adjusting the preset waiting time delay for forwarding the first data packet by the first network device to be a third waiting time delay, wherein the third waiting time delay is larger than the preset waiting time delay, and the third level is smaller than the second level.
2. The method of claim 1, wherein prior to determining the level of bandwidth occupancy for each of the network devices based on the bandwidth occupancy and management information for each of the network devices, the method further comprises:
and determining the preset waiting time delay of each network device for forwarding the first data packet according to the preset total waiting time delay and the number of the at least two network devices, wherein the preset total waiting time delay is used for indicating the waiting time length of the at least two network devices for forwarding the first data packet.
3. The method of claim 1, wherein if the resource information is a buffer capacity of the at least two network devices, determining a latency of forwarding the first data packet by each of the network devices according to the resource information comprises:
obtaining the cache total capacity of the at least two network devices;
And determining the waiting time delay of forwarding the first data packet by each network device according to the ratio of the buffer capacity of each network device to the total buffer capacity and the preset waiting time delay, wherein the preset waiting time delay is used for indicating the waiting time length of forwarding the first data packet by at least two network devices.
4. A method according to any one of claims 1-3, wherein said controlling each of said network devices to forward said first data packets 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 indicated waiting time delay.
5. A communication device, comprising:
a receiving unit, configured to obtain resource information of at least two network devices, where the resource information includes bandwidth occupancy rate and buffer capacity 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;
the processing unit is further used for controlling each network device to forward the first data packet according to the indicated waiting time delay;
The processing unit is further configured to determine a level of bandwidth occupancy rate of each network device according to bandwidth occupancy rate of each network device and management information, where the management information is used to indicate a corresponding relationship between a bandwidth occupancy rate range and a bandwidth occupancy rate level; determining the waiting time delay of forwarding the first data packet by each network device according to the level of the bandwidth occupancy rate of each network device;
the processing unit is further configured to adjust a preset latency of forwarding the first data packet by the first network device to a first latency if the level of the bandwidth occupancy of the first network device is a first level, where the first latency is smaller than the preset latency, 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, the preset waiting time delay is used as a second waiting time delay for forwarding the first data packet by the first network device, the second waiting time delay is equal to the preset waiting time delay, and the second level is smaller than the first level; and if the level of the bandwidth utilization rate of the first network device is a third level, adjusting the preset waiting time delay for forwarding the first data packet by the first network device to be a third waiting time delay, wherein the third waiting time delay is larger than the preset waiting time delay, and the third level is smaller than the second level.
6. 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 1-3.
7. 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 1-3 to control the at least two network devices to forward the first data packet according to the indicated latency.
8. A computer readable storage medium comprising computer instructions which, when run on a computer, cause the computer to perform the method of any of claims 1-3.
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| CN117395167A (en) * | 2020-01-21 | 2024-01-12 | 华为技术有限公司 | Service level configuration method and device |
| CN113162790B (en) * | 2020-01-22 | 2023-10-03 | 华为技术有限公司 | Method, device, equipment and storage medium for adjusting service level |
| CN111885650A (en) * | 2020-07-01 | 2020-11-03 | 中国联合网络通信集团有限公司 | Communication method and network management equipment |
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