CN109787919B - Information transmission method and device, computer storage medium and terminal - Google Patents
Information transmission method and device, computer storage medium and terminal Download PDFInfo
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- CN109787919B CN109787919B CN201811614930.0A CN201811614930A CN109787919B CN 109787919 B CN109787919 B CN 109787919B CN 201811614930 A CN201811614930 A CN 201811614930A CN 109787919 B CN109787919 B CN 109787919B
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Abstract
A method, a device, a computer storage medium and a terminal for information transmission are applied to a time-sensitive network and comprise the following steps: respectively marking different types of messages according to the types of the received messages; caching the marked message; according to the type of the cached message and the real-time state of the outlet port gate queue corresponding to the message, transmitting the cached message; the type of the message comprises: time sensitive frames and non-time sensitive frames. The embodiment of the invention transmits and processes the message according to the real-time state of the exit port gate queue, thereby reducing the transmission delay of the time-sensitive frame.
Description
Technical Field
The present disclosure relates to, but not limited to, communication technologies, and more particularly, to a method, an apparatus, a computer storage medium, and a terminal for information transmission.
Background
With the rapid development of industrial automation, a Time Sensitive Network (TSN) developed by IEEE802.1 will become one of the trends of future development. The TSN can guarantee packet delay for a switching network, and time-sensitive frames and non-time-sensitive frames can be transmitted in one network without worrying about data collision.
The TSN mainly solves three problems of clock synchronization, data scheduling and system configuration; in the data scheduling process, after receiving the data frame, the node copies the data frame into two parts, respectively filters and buffers the two parts, and waits for the queue to schedule and forward. According to the IEEE802.1Qbv, the queue scheduling strictly realizes scheduling and forwarding according to the on-off state of the transmission gate queue, in this case, the time sensitive frame is firstly buffered, and is allowed to pass through after the transmission gate queue corresponding to the scheduling is opened, and when the scheduling and forwarding are carried out according to the mode, the time delay of the time sensitive frame is increased.
Disclosure of Invention
The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.
Embodiments of the present invention provide an information transmission method, an information transmission device, a computer storage medium, and a terminal, which can reduce transmission delay of a time-sensitive frame.
The embodiment of the invention provides an information transmission method, which is applied to a time-sensitive network and comprises the following steps:
respectively marking different types of messages according to the types of the received messages;
caching the marked message;
according to the type of the cached message and the real-time state of the outlet port gate queue corresponding to the message, transmitting the cached message;
wherein, the type of the message comprises: time sensitive frames and non-time sensitive frames.
Optionally, the marking the different types of messages respectively includes:
adding a first identifier for distinguishing the receiving sequence of the time sensitive frames to each time sensitive frame;
and adding a second identifier for distinguishing the non-time sensitive frame from the time sensitive frame to each non-time sensitive frame.
Optionally, the transmitting the cached message according to the type of the cached message and the real-time state of the egress port gate queue corresponding to the message includes:
when the cached message has a sensitive time frame and the corresponding output port gate queue forwards the sensitive time frame, sending the cached sensitive time frame according to the receiving sequence; after all the sensitive time frames are forwarded and when the cached messages have the non-sensitive time frames, forwarding the non-sensitive time frames;
when the cached message has a sensitive time frame and the corresponding egress port gate queue forwards the non-sensitive time frame, stopping forwarding the current non-sensitive time frame and sending the cached sensitive time frame according to the receiving sequence; after the forwarding of all the cached sensitive time frames is finished, forwarding the non-sensitive time frames which are stopped to be forwarded;
and when the cached message only has the non-sensitive time frame and no message is sent currently in the outlet port gate queue corresponding to the cached message, directly forwarding the cached message.
Optionally, when the cached packet is subjected to transmission processing, the method further includes:
setting a gate control list corresponding to each output port to configure the opening time and the opening duration of a gate queue of the output port in a set period;
when the output port door queue is judged to be in the state of transmitting the buffered time sensitive frame, the output port door queue is kept in an open state until the buffered time sensitive frame is transmitted; after the time-sensitive frame is transmitted, restoring the state of the gate queue of the output port to the state configured by the gate control list;
and forwarding the non-sensitive time frame when the cached message contains the non-sensitive time frame and the real-time state of the outlet port door queue corresponding to the non-sensitive time frame is the opening state and no message is sent.
Optionally, after the different types of messages are respectively marked, the method further includes:
recording the first identifier added to each time-sensitive frame, and the corresponding relation between the output port corresponding to the time-sensitive frame and the output port gate queue, and the corresponding relation between the output port corresponding to the non-time-sensitive frame and the output port gate queue.
Optionally, after the different types of messages are respectively marked, the method further includes:
and determining the receiving time of each sensitive time frame and the transmission time length of each sensitive time frame which are cached according to the mark of each sensitive time frame.
Optionally, the method further includes: when two buffered time-sensitive frames are continuously received adjacent time-sensitive frames forwarded by the same output port gate queue, and the received time difference is less than or equal to the sum of the transmission duration of the first received time-sensitive frame and a preset time threshold, adjusting the opening duration of the output port gate queue corresponding to the two buffered time-sensitive frames in the gating list to be: and sending the sum of the transmission durations of the two adjacent frame time sensitive frames, and reducing the opening durations of the remaining gate queues of the output port according to a preset strategy so as to enable the sum of the opening durations of all the gate queues of the output port to be equal to the previous configuration state of the gating list.
Optionally, the reducing the opening duration of the exit port remaining gate queue according to the preset policy includes:
determining the type of the message in each gate queue left at the output port according to the gating list;
according to the added value of the opening duration of the exit port gate queue corresponding to the corresponding time sensitive frame in the updated gating list, and according to the number of the remaining gate queues of the exit port, reducing the opening duration of one or more gate queues remaining at the exit port;
and in the output port residual gate queue, the reduction time length of the opening time length of the gate queue for transmitting the time-sensitive frame is less than or equal to the reduction time length of the opening time length of the gate queue for transmitting the non-time-sensitive frame.
Optionally, the preset time threshold is:
and half of the minimum value of the starting time length in all the outlet port gate queues in the gating list.
On the other hand, an embodiment of the present invention further provides an information transmission apparatus, which is applied to a time-sensitive network, and includes: the device comprises a marking unit, a buffer unit and a transmission unit; wherein the content of the first and second substances,
the marking unit is used for: respectively marking different types of messages according to the types of the received messages;
the buffer unit is used for: caching the marked message;
the transmission unit is used for: according to the type of the cached message and the real-time state of the outlet port gate queue corresponding to the message, transmitting the cached message;
wherein, the type of the message comprises: time sensitive frames and non-time sensitive frames.
Optionally, the marking unit is specifically configured to:
adding a first identifier for distinguishing the receiving sequence of the time sensitive frames to each time sensitive frame;
and adding a second identifier for distinguishing the non-time sensitive frame from the time sensitive frame to each non-time sensitive frame.
Optionally, the transmission unit is specifically configured to:
when the cached message has a sensitive time frame and the corresponding output port gate queue forwards the sensitive time frame, sending the cached sensitive time frame according to the receiving sequence; after all the sensitive time frames are forwarded, forwarding the non-sensitive time frames when the cached messages have the non-sensitive time frames;
when the cached message has a sensitive time frame and the corresponding exit port gate queue forwards the non-sensitive time frame, stopping forwarding the current non-sensitive time frame and sending the cached sensitive time frame according to the receiving sequence; after all the cached sensitive time frames are forwarded, forwarding the non-sensitive time frames which are stopped to be forwarded;
and when the cached message only has a non-sensitive time frame and no message is currently sent in the exit port gate queue corresponding to the cached message, directly forwarding the cached message.
Optionally, the apparatus further includes a list processing unit, configured to:
setting a gate control list corresponding to each output port to configure the opening time and the opening duration of a gate queue of the output port in a set period;
when the output port door queue is judged to be in the state of transmitting the cached time sensitive frame, keeping the output port door queue in the open state until the cached time sensitive frame is transmitted; after the time-sensitive frame is transmitted, restoring the state of the gate queue of the output port to the state configured by the gate control list;
and forwarding the non-sensitive time frame when the cached message contains the non-sensitive time frame and the real-time state of the outlet port door queue corresponding to the non-sensitive time frame is the opening state and no message is sent.
Optionally, the apparatus further includes a recording unit, configured to:
recording the first identifier added to each time-sensitive frame, and the corresponding relation between the output port corresponding to the time-sensitive frame and the output port gate queue, and the corresponding relation between the output port corresponding to the non-time-sensitive frame and the output port gate queue.
Optionally, the marking unit is further configured to:
and determining the receiving time of each sensitive time frame and the transmission time length of each sensitive time frame which are cached according to the mark of each sensitive time frame.
Optionally, the apparatus further includes an adjusting unit, configured to:
when two buffered time-sensitive frames are continuously received adjacent time-sensitive frames forwarded by the same output port gate queue, and the received time difference is less than or equal to the sum of the transmission duration of the first received time-sensitive frame and a preset time threshold, adjusting the opening duration of the output port gate queue corresponding to the two buffered time-sensitive frames in the gating list to be: and sending the sum of the transmission durations of the two adjacent frame time sensitive frames, and reducing the opening durations of the remaining gate queues of the output port according to a preset strategy so as to enable the sum of the opening durations of all the gate queues of the output port to be equal to the previous configuration state of the gating list.
Optionally, the reducing, by the adjusting unit according to a preset policy, the opening duration of the egress port remaining gate queue includes:
determining the type of the message in each gate queue left at the output port according to the gating list;
according to the added value of the opening duration of the exit port gate queue corresponding to the corresponding time sensitive frame in the updated gating list, and according to the number of the remaining gate queues of the exit port, reducing the opening duration of one or more gate queues remaining at the exit port;
and in the output port residual gate queue, the reduction time length of the opening time length of the gate queue for transmitting the time-sensitive frame is less than or equal to the reduction time length of the opening time length of the gate queue for transmitting the non-time-sensitive frame.
Optionally, the preset time threshold is:
and half of the minimum value of the starting time length in all the outlet port gate queues in the gating list.
In still another aspect, an embodiment of the present invention further provides a computer storage medium, where computer-executable instructions are stored in the computer storage medium, and the computer-executable instructions are configured to perform the above information transmission method.
In another aspect, an embodiment of the present invention further provides a terminal, including: a memory and a processor; wherein the content of the first and second substances,
the processor is configured to execute program instructions in the memory;
the program instructions read at the processor to perform the following operations:
respectively marking different types of messages according to the types of the received messages;
caching the marked message;
transmitting the cached message according to the type of the cached message and the real-time state of the outlet port gate queue corresponding to the message;
wherein, the type of the message comprises: time sensitive frames and non-time sensitive frames.
Compared with the related art, the technical scheme of the application comprises the following steps: respectively marking different types of messages according to the types of the received messages; caching the marked message; transmitting the cached message according to the type of the cached message and the real-time state of the outlet port gate queue corresponding to the message; the types of the messages comprise: time sensitive frames and non-time sensitive frames. The embodiment of the invention transmits and processes the message according to the real-time state of the exit port gate queue, thereby reducing the transmission delay of the time-sensitive frame.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
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 flow chart of a method of information transmission according to an embodiment of the present invention;
FIG. 2 is a block diagram of an apparatus for information transmission according to an embodiment of the present invention;
fig. 3 is a flow chart of an exemplary message transmission application of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
The steps illustrated in the flow charts of the figures may be performed in a computer system such as a set of computer-executable instructions. Also, while a logical order is shown in the flow diagrams, in some cases, the steps shown or described may be performed in an order different than here.
Fig. 1 is a flowchart of an information transmission method according to an embodiment of the present invention, which is applied to a time-sensitive network, and as shown in fig. 1, the method includes:
optionally, the method in the embodiment of the present invention further includes: judging the type of the received message, namely judging the received message to be a time sensitive frame and a non-time sensitive frame; the method of determining the time-sensitive frame and the non-time-sensitive frame may be implemented with reference to methods already known in the related art.
Optionally, the step of marking the different types of messages respectively in the embodiment of the present invention includes:
adding a first identifier for distinguishing the receiving sequence of the time sensitive frames to each time sensitive frame;
and adding a second identifier for distinguishing the non-time sensitive frame from the time sensitive frame to each non-time sensitive frame. Optionally, the first identifier in the embodiment of the present invention includes: an identification is formed based on the sequence number.
103, transmitting the cached message according to the type of the cached message and the real-time state of the exit port gate queue corresponding to the message;
wherein, the type of the message comprises: time sensitive frames and non-time sensitive frames.
Optionally, the embodiments of the present invention
The transmission processing of the cached message according to the type of the cached message and the real-time state of the exit gate queue corresponding to the message comprises:
when the cached message has a sensitive time frame and the corresponding output port gate queue forwards the sensitive time frame, sending the cached sensitive time frame according to the receiving sequence; after all the sensitive time frames are forwarded, forwarding the non-sensitive time frames when the cached messages have the non-sensitive time frames;
when the cached message has a sensitive time frame and the corresponding egress port gate queue forwards the non-sensitive time frame, stopping forwarding the current non-sensitive time frame and sending the cached sensitive time frame according to the receiving sequence; after the forwarding of all the cached sensitive time frames is finished, forwarding the non-sensitive time frames which are stopped to be forwarded;
and when the cached message only has the non-sensitive time frame and no message is sent currently in the outlet port gate queue corresponding to the cached message, directly forwarding the cached message.
It should be noted that, the transmission sequence of the non-time-sensitive frames in the embodiment of the present invention is not limited, and can be set by a person skilled in the art according to related experience.
Optionally, when the embodiment of the present invention performs transmission processing on the cached message, the method further includes:
setting a gate control list corresponding to each output port to configure the opening time and the opening duration of a gate queue of the output port in a set period;
when the output port door queue is judged to be in the state of transmitting the buffered time sensitive frame, the output port door queue is kept in an open state until the buffered time sensitive frame is transmitted; after the time sensitive frame is transmitted, restoring the state of the gate queue at the output port to the state configured by the gate control list;
and when the cached message contains the non-sensitive time frame and the real-time state of the outlet port door queue corresponding to the non-sensitive time frame is the opening state and no message is sent, forwarding the non-sensitive time frame.
Optionally, in the embodiment of the present invention, the previously preset gate queue state of the egress port is always kept unchanged in the transmission processing process of the cache packet, that is, the preset gate list is kept unchanged.
Optionally, after the different types of messages are respectively marked, the method in the embodiment of the present invention further includes:
and recording the first identification added to each time sensitive frame, and the corresponding relation between the output port corresponding to the time sensitive frame and the output port gate queue, and the corresponding relation between the output port corresponding to the non-time sensitive frame and the output port gate queue.
Optionally, when the cached message is transmitted and processed, after the messages of different types are respectively marked, the method in the embodiment of the present invention further includes:
and determining the receiving time of each sensitive time frame and the transmission time length of each sensitive time frame according to the mark of each sensitive time frame.
Optionally, the method in the embodiment of the present invention further includes:
when two buffered time-sensitive frames are continuously received adjacent time-sensitive frames forwarded by the same output port gate queue, and the received time difference is less than or equal to the sum of the transmission duration of the first received time-sensitive frame and a preset time threshold, adjusting the opening duration of the output port gate queue corresponding to the two buffered time-sensitive frames in the gating list to be: and sending the sum of the transmission durations of the two adjacent frame time sensitive frames, and reducing the opening durations of the remaining gate queues of the output port according to a preset strategy so as to enable the sum of the opening durations of all the gate queues of the output port to be equal to the previous configuration state of the gating list.
Optionally, the reducing the opening duration of the exit port remaining gate queue according to the preset policy includes:
determining the type of the message in each gate queue left at the output port according to the gating list;
according to the added value of the opening duration of the exit port gate queue corresponding to the corresponding time sensitive frame in the updated gating list, and according to the number of the remaining gate queues of the exit port, reducing the opening duration of one or more gate queues remaining at the exit port;
and in the output port residual gate queue, the reduction time length of the opening time length of the gate queue for transmitting the time-sensitive frame is less than or equal to the reduction time length of the opening time length of the gate queue for transmitting the non-time-sensitive frame.
Optionally, the preset time threshold in the embodiment of the present invention may be selected as half of the minimum opening duration in all the egress gate queues in the preset gating list according to data determined by system design.
Compared with the related art, the technical scheme of the application comprises the following steps: respectively marking different types of messages according to the types of the received messages; caching the marked message; according to the type of the cached message and the real-time state of the outlet port gate queue corresponding to the message, transmitting the cached message; the type of the message comprises: time sensitive frames and non-time sensitive frames. The embodiment of the invention transmits and processes the message according to the real-time state of the exit port gate queue, thereby reducing the transmission delay of the time-sensitive frame.
Fig. 2 is a block diagram of an information transmission apparatus according to an embodiment of the present invention, as shown in fig. 2, including: the device comprises a marking unit, a buffer unit and a transmission unit; wherein the content of the first and second substances,
the marking unit is used for: respectively marking different types of messages according to the types of the received messages;
the buffer unit is used for: caching the marked message;
the transmission unit is used for: according to the type of the cached message and the real-time state of the outlet port gate queue corresponding to the message, transmitting the cached message;
wherein, the type of the message comprises: time sensitive frames and non-time sensitive frames.
Optionally, the marking unit in the embodiment of the present invention is specifically configured to:
adding a first identifier for distinguishing the receiving sequence of the time sensitive frames to each time sensitive frame;
and adding a second identifier for distinguishing the non-time sensitive frame from the time sensitive frame to each non-time sensitive frame.
Optionally, the transmission unit in the embodiment of the present invention is specifically configured to:
when the cached message has a sensitive time frame and the corresponding output port gate queue forwards the sensitive time frame, sending the cached sensitive time frame according to the receiving sequence; after all the sensitive time frames are forwarded, forwarding the non-sensitive time frames when the cached messages have the non-sensitive time frames;
when the cached message has a sensitive time frame and the corresponding exit port gate queue forwards the non-sensitive time frame, stopping forwarding the current non-sensitive time frame and sending the cached sensitive time frame according to the receiving sequence; after all the cached sensitive time frames are forwarded, forwarding the non-sensitive time frames which are stopped to be forwarded;
and when the cached message only has the non-sensitive time frame and no message is sent currently in the outlet port gate queue corresponding to the cached message, directly forwarding the cached message.
Optionally, the apparatus in this embodiment of the present invention further includes a list processing unit, configured to:
setting a gating list corresponding to each output port to configure the opening time and the opening duration of a gate queue of the output port in a set period;
when the output port door queue is judged to be in the state of transmitting the buffered time sensitive frame, the output port door queue is kept in an open state until the buffered time sensitive frame is transmitted; after the time-sensitive frame is transmitted, restoring the state of the gate queue of the output port to the state configured by the gate control list;
and when the cached message contains the non-sensitive time frame and the real-time state of the outlet port door queue corresponding to the non-sensitive time frame is the opening state and no message is sent, forwarding the non-sensitive time frame.
Optionally, the apparatus in this embodiment of the present invention further includes a recording unit, configured to:
recording the first identifier added to each time-sensitive frame, and the corresponding relation between the output port corresponding to the time-sensitive frame and the output port gate queue, and the corresponding relation between the output port corresponding to the non-time-sensitive frame and the output port gate queue.
Optionally, the marking unit in the embodiment of the present invention is further configured to:
and determining the receiving time of each sensitive time frame and the transmission time length of each sensitive time frame which are cached according to the mark of each sensitive time frame.
Optionally, the apparatus in this embodiment of the present invention further includes an adjusting unit, configured to:
when two buffered time-sensitive frames are continuously received adjacent time-sensitive frames forwarded by the same output port gate queue, and the received time difference is less than or equal to the sum of the transmission duration of the first received time-sensitive frame and a preset time threshold, adjusting the opening duration of the output port gate queue corresponding to the two buffered time-sensitive frames in the gating list to be: and sending the sum of the transmission durations of the two adjacent frame time sensitive frames, and reducing the opening durations of the remaining gate queues at the output port according to a preset strategy so as to enable the sum of the opening durations of all the gate queues at the output port to be equal to the previous configuration state of the gating list.
Optionally, the reducing, by the adjusting unit according to the preset policy, the opening duration of the egress port remaining gate queue includes:
determining the type of the message in each gate queue left at the output port according to the gating list;
according to the added value of the opening duration of the exit port gate queue corresponding to the corresponding time sensitive frame in the updated gating list, and according to the number of the remaining gate queues of the exit port, reducing the opening duration of one or more gate queues remaining at the exit port;
and in the output port residual gate queue, the reduction time length of the gate queue opening time length for transmitting the time-sensitive frame is less than or equal to the reduction time length of the gate queue opening time length for transmitting the non-time-sensitive frame.
Optionally, the preset time threshold in the embodiment of the present invention is:
and half of the minimum value of the starting time length in all the outlet port gate queues in the gating list.
Compared with the related art, the technical scheme of the application comprises the following steps: respectively marking different types of messages according to the types of the received messages; caching the marked message; according to the type of the cached message and the real-time state of the outlet port gate queue corresponding to the message, transmitting the cached message; the type of the message comprises: time sensitive frames and non-time sensitive frames. According to the embodiment of the invention, the time sensitive frame is transmitted and processed preferentially by adjusting the state of the output port gate queue, so that the transmission delay of the time sensitive frame is reduced.
The embodiment of the invention also provides a computer storage medium, wherein the computer storage medium stores computer executable instructions, and the computer executable instructions are used for executing the information transmission method.
An embodiment of the present invention further provides a terminal, including: a memory and a processor; wherein the content of the first and second substances,
the processor is configured to execute program instructions in the memory;
the program instructions read on the processor to perform the following operations:
respectively marking different types of messages according to the types of the received messages;
caching the marked message;
according to the type of the cached message and the real-time state of the outlet port gate queue corresponding to the message, transmitting the cached message;
wherein, the type of the message comprises: time sensitive frames and non-time sensitive frames.
The method of the embodiment of the present invention is clearly and specifically explained by the application examples, which are only used for illustrating the present invention and are not used for limiting the protection scope of the present invention.
Application example
The following describes the method for information transmission according to the embodiment of the present invention by taking a time-sensitive frame and a non-time-sensitive frame as examples, and the application example of the present invention can be applied to a node device of a time-sensitive network.
Before information transmission, the application example of the invention presets a first identifier for adding to a time-sensitive frame and a second identifier for adding to a non-time-sensitive frame; wherein the first identifier may be a sequence number in a preset cyclic sequence (e.g., 1-65535); the second identifier may be a number (e.g., 0) that does not intersect the first identifier; in the application example of the invention, the preset cyclic sequence can be a time sequence, and each time-sensitive frame can be distinguished through the time sequence, and the sequencing of the time-sensitive frames can also be determined; it should be noted that, the non-time-sensitive frame may not be added with the identifier, and in view of the fact that the time-sensitive frame is added with the first identifier, when the non-time-sensitive frame is not added with the identifier information, the time-sensitive frame and the non-time-sensitive frame may be distinguished according to whether the identifier is added or not; alternatively, the first identifier may be selected incrementally from a cyclic sequence; or, the first identifier is selected according to other manners, as long as the first identifier added to the time-sensitive frame can distinguish the time-sensitive frames and determine the receiving sequence of the time-sensitive frames; the application example of the invention records the used or usable first identifier in the cyclic sequence, and realizes the subsequent processing based on the first identifier according to the record.
The application example of the invention refers to the related technology, and corresponding gating lists are respectively configured for each output port in advance; the gating list is used for determining time information (including starting time and starting duration) allowing the data message to pass through in a set period; in the setting period, the time and the opening duration of the door queue state are set according to the time information, so that the data message is allowed to pass through. For example, setting a port queue 7-0, a time sensitive frame corresponding queue 7-4, a non-time sensitive frame corresponding queue 3-0, configuring a gating list D0-D2, wherein the gate queue state corresponding to the D0 moment is 10000000, the gate queue state corresponding to the D1 moment is 00001000, and the gate queue state corresponding to the D2 moment is 00000001; wherein, assuming that 1 in the gate queue state indicates that the control egress port is open and 0 indicates that the control egress port is closed, the setting indicates: at time D0, the gate queue 7 is open; at time D1, the gate queue 3 is open; and at time D2, gate queue 0 is open; and circularly reproducing the states of the gate queues corresponding to the D0, D1 and D2 moments according to a set period.
Fig. 3 is a flowchart of exemplary information transmission applied in the present invention, as shown in fig. 3, including:
it should be noted that the determination of the type of the packet can be implemented by those skilled in the art through related technologies; for example, according to the ieee802.3br rule, the determination may be performed by using the inter-frame distance field identifier of the packet;
the application example of the invention selects a first identifier from an unoccupied first identifier set, and adds the first identifier to the time-sensitive frame; assuming that the first identifier is from the cyclic sequence, the application example of the present invention selects a number in the cyclic sequence as the first identifier from the cyclic sequence in the current cyclic period according to a preset selection strategy; after the first identifier is occupied in the current cycle, the application example of the invention can be recorded by referring to the related technology; for example, selecting one of the unoccupied first marker sets, adding it to the time sensitive frame (e.g., sequence number X), updating the next available first marker to be (X + 1) (when X +1 is less than the maximum) or the minimum (when X is the maximum, i.e., selecting the first value in the next cycle period);
optionally, the adding the first identifier to the time-sensitive frame according to the application example of the present invention may include: adding a first identifier at a preset position of a time sensitive frame; for example, in a reserved field of the header; or, remaining free fields; the preset position can be preset by a person with ordinary skill in the art; the application example of the present invention may set the initial value of the currently unoccupied first identifier as: a minimum value in a cyclic sequence;
optionally, the adding the second identifier to the non-time-sensitive frame according to the application example of the present invention may include: adding a second identifier at a preset position of the non-time-sensitive frame; for example, in a reserved field of the header; or, remaining free fields; the preset position can be preset by a person with ordinary skill in the art; optionally, the positions of adding the first identifier in the time-sensitive frame and adding the second identifier in the non-time-sensitive frame are generally the same in the application example of the present invention, which may facilitate the application processing at a later stage.
optionally, the application example of the present invention may obtain (typically, may be obtained by a chip) an egress port and an egress port gate queue of the time-sensitive frame according to information such as a source physical address (MAC), a destination MAC, an ethernet type, a source internet protocol address (IP), a destination IP, and a Virtual Local Area Network (VLAN) Identity (ID) carried in a message header of the time-sensitive frame, in a known manner in the related art; the application example of the invention can complete the exit path selection of the time sensitive frame according to the corresponding relation of the obtained exit port and the exit port gate queue;
it should be noted that, the egress path selection in the application example of the present invention may be determined by a person skilled in the art according to information carried by the data frame itself by using a determination method existing in the related art, which is not limited herein;
it should be noted that, the application example of the present invention may obtain and record the corresponding relationship between the egress port and the egress port gate queue of the non-time-sensitive frame message according to the information, such as the source MAC, the destination MAC, the ethertype, the source IP, the destination IP, and the VLAN ID, carried in the header of the non-time-sensitive frame message in a known manner in the related art, and may complete the egress path selection of the non-time-sensitive frame;
optionally, the selection manner of the application example egress path of the present invention may be implemented by any known manner by a person skilled in the art according to the message carrying information, and is not limited herein;
optionally, in the embodiment of the present invention, when a message is cached, it is determined whether a message is being sent in a gate queue of an egress port corresponding to a current message, and when a message is being sent, the type of the sent message and the real-time state of the egress port gate queue are determined;
optionally, the real-time status of the egress port gate queue according to an exemplary application of the present invention includes: forwarding the non-time-sensitive frame, completing forwarding the non-time-sensitive frame, forwarding the time-sensitive frame and completing forwarding the time-sensitive frame; the actual real-time status of completing forwarding non-time sensitive frames and completing forwarding time sensitive frames may include: and no message is sent.
Optionally, in an application example of the present invention, when the currently received and buffered message is a time-sensitive frame, the egress port gate queue for transmitting the time-sensitive frame is opened until the forwarding is completed;
optionally, when the current buffered message is a time-sensitive frame, determining a real-time state of a gate queue of an egress port of the current buffered message, if the current buffered message is open and no message (including the time-sensitive frame and a non-time-sensitive frame) is sent, forwarding the buffered time-sensitive frame from an egress port corresponding to the current time-sensitive frame and open and maintaining a state of the gate queue (that is, the gate queue remains open) to the completion of sending the time-sensitive message, and recording the real-time state of the gate queue; it should be noted that, keeping the gate queue state only controls whether the actual gate queue state is opened, and does not update the configured gate queue state recorded in the current gate control list; that is, when the egress gate queue is kept open, the state of the gate queue in the preconfigured gate control list may be different from the state of the actual gate queue, that is, the time length for which the egress gate queue is opened exceeds the time length for which the gate queue configured in the gate control list is opened (that is, the actual state of the gate queue is opened for transmitting the sensitive time frame according to the state of the gate queue in the configured gate control list should be closed); however, after the forced opening is finished, the state of the gate queue is the same as the state of the actual gate queue, and the state of the gate queue in the gate control list configured in advance is the basis of the state change of the whole gate queue and is the basis of the planning of the allowed message transmission time. When the message is forwarded, the application example of the invention also monitors whether the message is forwarded in the gate queue of the output port, and records the current forwarding state of the corresponding output port;
optionally, when the current buffered message is a time sensitive frame, determining a real-time state of an egress port gate queue of the current buffered message, if the current buffered message is open and the current egress port has a currently-transmitted time sensitive frame, after the currently-transmitted time sensitive frame is completely transmitted, continuing to transmit the buffered time sensitive frame from the egress port, and when a plurality of buffered time sensitive frames exist, determining a receiving sequence of the time sensitive frames according to the first identifier, sequentially transmitting the buffered time sensitive frames according to the determined receiving sequence, keeping the egress port gate queue in an open state until the time sensitive message is completely transmitted, and recording the real-time state of the egress port gate queue;
when the current buffered message is a time sensitive frame, judging the real-time state of an output port door queue, if the current buffered message is a time sensitive frame and no message is sent from the output port, opening the output port door queue corresponding to the buffered time sensitive frame, forwarding the buffered time sensitive frame from the output port door queue, keeping the open state of the door queue until the time sensitive frame is sent completely, and recording the actual state of the door queue;
when the current buffer message is a time sensitive frame, the real-time state of the exit port gate queue is judged, if the current buffer message is closed, and when the current exit port gate queue has a non-time sensitive frame and is transmitting, the state of the current exit port gate queue is adjusted, including but not limited to: setting the state of an outlet door queue transmitted by a non-time sensitive frame as closed, and opening the outlet door queue forwarded by a sensitive time frame; stopping the transmission of the non-time-sensitive frame and allowing the transmission of the sensitive time frame until the transmission of the sensitive time frame is completed; when the time-sensitive frame needing to be sent does not exist in the cache, setting an outlet port gate queue corresponding to the non-time-sensitive frame which is paused to be sent to be opened, and sending the non-time-sensitive frame which is stopped to be sent before; recording the actual state of the outlet port door queue;
when the current cached message is a non-time-sensitive frame, judging the real-time state of an output port gate queue, if the current cached message is the non-time-sensitive frame and the output port gate queue is opened and no message is sent, forwarding the cached non-time-sensitive frame from an allocated output port; if the output port is closed and no message is sent at present, adjusting the real-time state of the output port door queue to be open, and forwarding the cached non-time sensitive frame through the opened output port door queue; recording the actual state of the outlet port door queue;
optionally, when forwarding a packet, the application example of the present invention further records, according to a packet sequence number, a reception time of a sensitive time frame, a start time of packet transmission, and a completion time of packet transmission; the message transmission duration can be determined according to the starting time of message transmission and the completion time of message transmission; here, the receiving time is the time when the node device receives the packet, at this time, the packet is not cached, and the starting time of packet transmission is: starting to forward the message from the buffer;
optionally, the application example of the present invention further includes:
when the time difference between the receiving times of two consecutive adjacent time sensitive frames (the (N-1) th time sensitive frame and the (N) th time sensitive frame) is greater than the sum of the transmission time of the first time sensitive frame (the (N-1) th time sensitive frame) and a preset time threshold, the opening time of the gate queue in the preset gate list is not modified.
When the time difference between the receiving times of two consecutive adjacent time-sensitive frames (the (N-1) th time-sensitive frame and the (N) th time-sensitive frame) is not more than the sum of the transmission time of the first time-sensitive frame (the (N-1) th time-sensitive frame) and a preset time threshold, the opening time of the gate queue can be analyzed and determined to need to be prolonged; at this time, optionally, the application example of the present invention sets the gate queue open time as: the opening time of the gate queue and the transmission time length are preset in the gate control list; since the total duration of the remaining gate queues and the opening time of the gate queue in the period is fixed, the opening time of the remaining gate queues is reduced (forced opening time/n), wherein n is the number of the remaining gate queues, and the opening time of each gate queue in the gating list is updated according to the forced opening time/n. Optionally, when it can be determined which gate queues are time-sensitive frames according to the gating list, that is, a gate queue capable of transmitting a time-sensitive frame and a non-time-sensitive frame is set for each port in advance, and which gate queues are time-sensitive frames can be distinguished according to the number of the gate queues in the gating list; the application example of the invention can set the reduction duration of the gate queue opening time of the time sensitive frames of the remaining gate queues to be less than or equal to the reduction duration of the gate queue opening time of the non-time sensitive frames, and the reduction durations can be respectively set according to the application scene; when the gate queues of the time sensitive frame and the non-time sensitive frame are not distinguished, the opening duration of the remaining gate queues is divided into the remaining gate queues.
In the above adjustment process, the preset time threshold is determined according to the system design, and may be generally selected to be half of the minimum opening duration of all the gate queues in the preset gating list.
Optionally, when a condition that a time difference between receiving times of two consecutive adjacent time-sensitive frames (an N-1 th time-sensitive frame and an nth time-sensitive frame) is not greater than a sum of a transmission duration of a first time-sensitive frame (the N-1 th time-sensitive frame) and a preset time threshold occurs for a set number of times; the application example of the invention starts the operation of updating the gating list.
Optionally, when the application example of the present invention does not preset configuration and record the gating list, the packet output processing may be performed according to steps 101 to 104, and step 105 is replaced with:
and judging whether the currently received and cached message is a sensitive time frame or a non-time sensitive frame, and forwarding the sensitive time frame according to the receiving sequence and the real-time state priority of the egress port gate queue.
Optionally, the method may specifically include:
when the current received message is a time sensitive frame, if no message is sent at the output port, the time sensitive frame is directly forwarded;
when the currently received message is a time sensitive frame, if the current output port forwards a non-time sensitive time frame, stopping sending the non-time sensitive time frame and sending the time sensitive frame; when the currently received message is a time sensitive frame, if the current output port forwards the time sensitive frame, sequentially sending the time sensitive frame according to the sequence number; namely waiting for the time sensitive frame currently being sent to be sent to send the received time sensitive frame after the time sensitive frame is sent completely;
if the current output port is forwarding the message when the currently received message is a non-time sensitive frame; it is transmitted sequentially.
The invention discloses a method for improving the quick transmission of a time sensitive frame of a time sensitive network by applying an example, when a node receives the time sensitive frame, a corresponding output port is informed to allow the time sensitive frame to pass through, thereby reducing the transmission delay caused by waiting for the opening of an output port gate queue of the time sensitive frame. The invention is applied to the example, when no gating list exists, the gating list is transmitted according to the principle that time sensitive frames are transmitted preferentially; when the gating list exists, the gating list is transmitted according to the principle of preferential transmission of time sensitive frames on the basis of the opening time of a gate queue of the gating list; and updating the opening time of the outlet port door queue of the gating list according to the network condition.
It will be understood by those skilled in the art that all or part of the steps of the above methods may be implemented by a program instructing associated hardware (e.g., a processor) to perform the steps, and the program may be stored in a computer readable storage medium, such as a read only memory, a magnetic or optical disk, and the like. Alternatively, all or part of the steps of the above embodiments may be implemented using one or more integrated circuits. Accordingly, each module/unit in the above embodiments may be implemented in hardware, for example, by an integrated circuit to implement its corresponding function, or in software, for example, by a processor executing a program/instruction stored in a memory to implement its corresponding function. The present invention is not limited to any specific form of combination of hardware and software.
Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (14)
1. A method for information transmission, applied to a time-sensitive network, is characterized by comprising the following steps:
respectively marking different types of messages according to the types of the received messages, comprising the following steps:
adding a first identifier for distinguishing the receiving sequence of the time sensitive frames to each time sensitive frame;
adding a second identifier for distinguishing the non-time-sensitive frame from the time-sensitive frame to each non-time-sensitive frame;
caching the marked message;
according to the type of the cached message and the real-time state of the outlet port gate queue corresponding to the message, the transmission processing of the cached message comprises the following steps:
when the cached message has a sensitive time frame and the corresponding output port gate queue forwards the sensitive time frame, sending the cached sensitive time frame according to the receiving sequence; after all the sensitive time frames are forwarded, forwarding the non-sensitive time frames when the cached messages have the non-sensitive time frames;
when the cached message has a sensitive time frame and the corresponding exit port gate queue forwards the non-sensitive time frame, stopping forwarding the current non-sensitive time frame and sending the cached sensitive time frame according to the receiving sequence; after all the cached sensitive time frames are forwarded, forwarding the non-sensitive time frames which are stopped to be forwarded;
when the cached message only has a non-sensitive time frame and no message is currently sent in an outlet port gate queue corresponding to the cached message, directly forwarding the cached message;
wherein, the type of the message comprises: time-sensitive frames and non-time-sensitive frames;
when the cached message is transmitted, the method further includes:
setting a gate control list corresponding to each output port to configure the opening time and the opening duration of a gate queue of the output port in a set period;
when the output port door queue is judged to be in the state of transmitting the buffered time sensitive frame, the output port door queue is kept in an open state until the buffered time sensitive frame is transmitted; after the time sensitive frame is transmitted, restoring the state of the gate queue at the output port to the state configured by the gate control list;
and when the cached message contains the non-sensitive time frame and the real-time state of the outlet port door queue corresponding to the non-sensitive time frame is the opening state and no message is sent, forwarding the non-sensitive time frame.
2. The method according to claim 1, wherein after the marking the different types of messages respectively, the method further comprises:
recording the first identifier added to each time-sensitive frame, and the corresponding relation between the output port corresponding to the time-sensitive frame and the output port gate queue, and the corresponding relation between the output port corresponding to the non-time-sensitive frame and the output port gate queue.
3. The method according to claim 1 or 2, wherein after the different types of packets are respectively marked, the method further comprises:
and determining the receiving time of each sensitive time frame and the transmission time length of each sensitive time frame according to the mark of each sensitive time frame.
4. The method of claim 3, further comprising:
when two buffered time-sensitive frames are continuously received adjacent time-sensitive frames forwarded by the same output port gate queue, and the received time difference is less than or equal to the sum of the transmission duration of the first received time-sensitive frame and a preset time threshold, adjusting the opening duration of the output port gate queue corresponding to the two buffered time-sensitive frames in the gating list to be: and sending the sum of the transmission durations of the two adjacent frame time sensitive frames, and reducing the opening durations of the remaining gate queues of the output port according to a preset strategy so as to enable the sum of the opening durations of all the gate queues of the output port to be equal to the previous configuration state of the gating list.
5. The method of claim 4, wherein said reducing the open duration of the egress port remaining gate queue according to the predetermined policy comprises:
determining the type of the message in each gate queue left at the output port according to the gating list;
according to the added value of the opening duration of the gate queue of the output port corresponding to the corresponding time sensitive frame in the updated gating list, and according to the number of the gate queues left at the output port, the opening duration of one or more gate queues left at the output port is reduced;
and in the output port residual gate queue, the reduction time length of the opening time length of the gate queue for transmitting the time-sensitive frame is less than or equal to the reduction time length of the opening time length of the gate queue for transmitting the non-time-sensitive frame.
6. The method of claim 4, wherein the preset time threshold is:
and half of the minimum value of the starting time length in all the outlet port gate queues in the gating list.
7. An apparatus for information transmission, applied to a time-sensitive network, comprising: the device comprises a marking unit, a buffer unit and a transmission unit; wherein the content of the first and second substances,
the marking unit is used for: respectively marking different types of messages according to the types of the received messages; wherein the marking unit is specifically configured to:
adding a first identifier for distinguishing the receiving sequence of the time sensitive frames to each time sensitive frame;
adding a second identifier for distinguishing the non-time-sensitive frame from the time-sensitive frame to each non-time-sensitive frame;
the buffer unit is used for: caching the marked message;
the transmission unit is used for: according to the type of the cached message and the real-time state of the outlet port gate queue corresponding to the message, transmitting the cached message; the transmission unit is specifically configured to:
when the cached message has a sensitive time frame and the corresponding output port gate queue forwards the sensitive time frame, sending the cached sensitive time frame according to the receiving sequence; after all the sensitive time frames are forwarded, forwarding the non-sensitive time frames when the cached messages have the non-sensitive time frames;
when the cached message has a sensitive time frame and the corresponding egress port gate queue forwards the non-sensitive time frame, stopping forwarding the current non-sensitive time frame and sending the cached sensitive time frame according to the receiving sequence; after the forwarding of all the cached sensitive time frames is finished, forwarding the non-sensitive time frames which are stopped to be forwarded;
when the cached message only has a non-sensitive time frame and no message is currently sent in an outlet port gate queue corresponding to the cached message, directly forwarding the cached message;
wherein, the type of the message comprises: time-sensitive frames and non-time-sensitive frames;
the apparatus further comprises a list processing unit for:
setting a gate control list corresponding to each output port to configure the opening time and the opening duration of a gate queue of the output port in a set period;
when the output port door queue is judged to be in the state of transmitting the buffered time sensitive frame, the output port door queue is kept in an open state until the buffered time sensitive frame is transmitted; after the time sensitive frame is transmitted, restoring the state of the gate queue at the output port to the state configured by the gate control list;
and forwarding the non-sensitive time frame when the cached message contains the non-sensitive time frame and the real-time state of the outlet port door queue corresponding to the non-sensitive time frame is the opening state and no message is sent.
8. The apparatus according to claim 7, further comprising a recording unit configured to:
and recording the first identification added to each time sensitive frame, and the corresponding relation between the output port corresponding to the time sensitive frame and the output port gate queue, and the corresponding relation between the output port corresponding to the non-time sensitive frame and the output port gate queue.
9. The apparatus of claim 7 or 8, wherein the marking unit is further configured to:
and determining the receiving time of each sensitive time frame and the transmission time length of each sensitive time frame which are cached according to the mark of each sensitive time frame.
10. The apparatus according to claim 9, further comprising an adjustment unit for:
when two buffered time-sensitive frames are continuously received adjacent time-sensitive frames forwarded by the same output port gate queue, and the received time difference is less than or equal to the sum of the transmission duration of the first received time-sensitive frame and a preset time threshold, adjusting the opening duration of the output port gate queue corresponding to the two buffered time-sensitive frames in the gating list to be: and sending the sum of the transmission durations of the two adjacent frame time sensitive frames, and reducing the opening durations of the remaining gate queues at the output port according to a preset strategy so as to enable the sum of the opening durations of all the gate queues at the output port to be equal to the previous configuration state of the gating list.
11. The apparatus of claim 10, wherein the adjusting unit reduces the open duration of the egress port remaining gate queue according to a predetermined policy comprises:
determining the type of the message in each gate queue left at the output port according to the gating list;
according to the added value of the opening duration of the gate queue of the output port corresponding to the corresponding time sensitive frame in the updated gating list, and according to the number of the gate queues left at the output port, the opening duration of one or more gate queues left at the output port is reduced;
and in the output port residual gate queue, the reduction time length of the opening time length of the gate queue for transmitting the time-sensitive frame is less than or equal to the reduction time length of the opening time length of the gate queue for transmitting the non-time-sensitive frame.
12. The apparatus of claim 10, wherein the preset time threshold is:
and half of the minimum value of the starting time length in all the outlet port gate queues in the gating list.
13. A computer storage medium having stored thereon computer-executable instructions for performing the method of information transfer of any one of claims 1-6.
14. A terminal, applied to a time-sensitive network, comprising: a memory and a processor; wherein the content of the first and second substances,
the processor is configured to execute program instructions in the memory;
the program instructions read on the processor to perform the following operations:
respectively marking different types of messages according to the types of the received messages; the method comprises the following steps:
adding a first identifier for distinguishing the receiving sequence of the time sensitive frames to each time sensitive frame;
adding a second identifier for distinguishing the non-time-sensitive frame from the time-sensitive frame to each non-time-sensitive frame;
caching the marked message;
according to the type of the cached message and the real-time state of the outlet port gate queue corresponding to the message, transmitting the cached message; the method comprises the following steps:
when the cached message has a sensitive time frame and the corresponding output port gate queue forwards the sensitive time frame, sending the cached sensitive time frame according to the receiving sequence; after all the sensitive time frames are forwarded, forwarding the non-sensitive time frames when the cached messages have the non-sensitive time frames;
when the cached message has a sensitive time frame and the corresponding exit port gate queue forwards the non-sensitive time frame, stopping forwarding the current non-sensitive time frame and sending the cached sensitive time frame according to the receiving sequence; after the forwarding of all the cached sensitive time frames is finished, forwarding the non-sensitive time frames which are stopped to be forwarded;
when the cached message only has a non-sensitive time frame and no message is currently sent in an outlet port gate queue corresponding to the cached message, directly forwarding the cached message; wherein, the type of the message comprises: time-sensitive frames and non-time-sensitive frames;
when the transmission processing is performed on the cached message, the method further includes:
setting a gate control list corresponding to each output port to configure the opening time and the opening duration of a gate queue of the output port in a set period;
when the output port door queue is judged to be in the state of transmitting the cached time sensitive frame, keeping the output port door queue in the open state until the cached time sensitive frame is transmitted; after the time-sensitive frame is transmitted, restoring the state of the gate queue of the output port to the state configured by the gate control list;
and forwarding the non-sensitive time frame when the cached message contains the non-sensitive time frame and the real-time state of the outlet port door queue corresponding to the non-sensitive time frame is the opening state and no message is sent.
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| CN112217615B (en) * | 2019-07-09 | 2023-05-12 | 华为技术有限公司 | Method and device for supporting time-sensitive network |
| CN112398627B (en) * | 2019-08-16 | 2023-01-10 | 中国移动通信有限公司研究院 | Information transmission method, device, related equipment and storage medium |
| CN112583510A (en) * | 2019-09-30 | 2021-03-30 | 华为技术有限公司 | Message forwarding method, device and system |
| CN112787838A (en) * | 2019-11-08 | 2021-05-11 | 华为技术有限公司 | Communication method, device and system |
| CN112910584B (en) * | 2019-12-03 | 2022-08-02 | 维沃移动通信有限公司 | Information transmission method and communication equipment |
| CN111224895B (en) * | 2019-12-27 | 2023-04-07 | 全球能源互联网研究院有限公司 | Time-sensitive message transmission method, device and equipment in HSR network |
| CN111328148B (en) * | 2020-03-11 | 2023-04-07 | 展讯通信（上海）有限公司 | Data transmission method and device |
| CN114071768B (en) * | 2020-08-07 | 2024-04-09 | 大唐移动通信设备有限公司 | Time synchronization method, device and storage medium |
| CN112073388B (en) * | 2020-08-20 | 2021-07-23 | 上海交通大学 | Time-sensitive heterogeneous network system of industrial control system and management method |
| CN113411270B (en) * | 2021-06-07 | 2023-04-07 | 中国人民解放军国防科技大学 | Message buffer management method for time-sensitive network |
| CN113783793B (en) * | 2021-07-23 | 2023-07-25 | 北京邮电大学 | Traffic scheduling method for time-sensitive data frames and related equipment |
| CN113821516B (en) * | 2021-10-12 | 2023-09-05 | 上海交通大学 | Time sensitive network switching system based on virtual queue |
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