CN113497986A - Periodic service transmission method, device, communication node and storage medium - Google Patents

Periodic service transmission method, device, communication node and storage medium Download PDF

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Publication number
CN113497986A
CN113497986A CN202010268032.5A CN202010268032A CN113497986A CN 113497986 A CN113497986 A CN 113497986A CN 202010268032 A CN202010268032 A CN 202010268032A CN 113497986 A CN113497986 A CN 113497986A
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China
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data transmission
node
transmission information
information
current node
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张伟良
李明生
马壮
李玉峰
袁立权
黄新刚
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ZTE Corp
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ZTE Corp
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Priority to CN202010268032.5A priority Critical patent/CN113497986A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q2011/0079—Operation or maintenance aspects

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  • Computer Networks & Wireless Communication (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

The application provides a periodic service transmission method, a device, a communication node and a storage medium, wherein the method comprises the following steps: determining data transmission information of a current node; and transmitting the periodic service based on the data transmission information of the current node.

Description

Periodic service transmission method, device, communication node and storage medium
Technical Field
The present application relates to the field of communications, and in particular, to a method, an apparatus, a communication node, and a storage medium for periodic service transmission.
Background
A Passive Optical Network (PON) is a pure medium Network, which avoids electromagnetic interference and lightning impact of external devices, reduces the failure rate of lines and external devices, improves system reliability, and saves maintenance cost.
However, when a periodic service is transmitted in a PON system, how to implement low-latency transmission of the periodic service is a technical problem to be solved at present.
Disclosure of Invention
In order to solve the above technical problem, the present application provides a periodic service transmission method, an apparatus, a communication node, and a storage medium.
In a first aspect, an embodiment of the present application provides a periodic service transmission method, including:
determining data transmission information of a current node;
and transmitting the periodic service based on the data transmission information of the current node.
In a second aspect, the present application provides a periodic traffic transmission apparatus, including:
a determining module configured to determine data transmission information of a current node;
and the transmission module is set to transmit the periodic service based on the data transmission information of the current node.
In a third aspect, the present application provides a communications node, comprising:
one or more processors;
storage means for storing one or more programs;
when executed by the one or more processors, cause the one or more processors to implement a method as provided by embodiments of the invention.
In a fourth aspect, the present application provides a storage medium storing a computer program, where the computer program is executed by a processor to implement any one of the methods in the embodiments of the present application.
With regard to the above embodiments and other aspects of the present application and implementations thereof, further description is provided in the accompanying drawings description, detailed description and claims.
Drawings
Fig. 1 is a schematic flowchart of a periodic service transmission method provided in the present application;
fig. 1a is a schematic diagram of a TSN service provided in the present application;
FIG. 1b is a schematic diagram illustrating a workflow of seamless matching of periodic services according to the present application;
fig. 1c is a schematic flow chart of a transmission delay determination method provided in the present application;
fig. 1d is a schematic flow chart of another transmission delay determination method provided in the present application;
fig. 1e is a schematic diagram of a transmission method of data transmission information provided in the present application;
fig. 1f is a schematic diagram of another transmission method of data transmission information provided in the present application;
fig. 1g is a schematic diagram of another transmission method of data transmission information provided in the present application;
fig. 2 is a schematic structural diagram of a periodic service transmission apparatus provided in the present application;
fig. 3 is a schematic structural diagram of a communication node according to the present application.
Detailed Description
To make the objects, technical solutions and advantages of the present application more apparent, embodiments of the present application 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.
In an exemplary embodiment, fig. 1 is a flowchart illustrating a periodic service transmission method, which may be applicable to a case of implementing low-latency transmission of a periodic service, where the method may be executed by a periodic service transmission apparatus, and the periodic service transmission apparatus may be implemented by software and/or hardware and integrated on a communication node. The communication node may be a node device for data transmission in a system for transmitting periodic traffic. The communication nodes may include a source end node, an intermediate node, and a destination end node. Data transmission information may be sent by a source end node, forwarded by an intermediate node to a remote end node, and finally received by a terminal node. The intermediate nodes may include Optical Line Terminals (OLTs) and Optical Network Units (ONUs). I.e. the source end node may be considered as the end node sending periodic traffic and the end node may be considered as the end node receiving periodic traffic.
The present application takes a Time Sensitive Network (TSN) as an example to describe the transmission of the periodic traffic, and the periodic traffic is not limited herein.
The TSN service is a delay and jitter sensitive service, and in order to implement low-delay transmission of the TSN service in a Passive Optical Network (PON) system, an OLT and an upstream device thereof need to be coordinated and matched, an ONU and a downstream device thereof need to be coordinated and matched, and the OLT and the ONU also need to be coordinated and matched. The method mainly solves the problem of a coordination and coordination mechanism and an interface among the devices so as to realize low-delay transmission of the TSN service in the PON system.
As shown in fig. 1, the periodic traffic transmission method provided by the present application includes S110 and S120.
And S110, determining the data transmission information of the current node.
The data transmission information may be information indicating periodic traffic transmission. The periodic traffic may be transmitted according to data transmission information at the time of transmission. In order to reduce the delay, the communication node may acquire data transmission information before transmitting the periodic service. The periodic traffic may be TSN traffic.
Optionally, the data transmission information may include one or more of the following: a data transmission start time; a data transmission end time; a data transmission period; a data transmission duration; and (5) forwarding time delay.
The data transmission start time is a time when the periodic service starts to be transmitted, such as a time when reception starts and a time when transmission starts, and the time when reception starts may be equal to the time when transmission starts. The data transmission end time is a time when the periodic service ends transmission, such as a time when reception ends and a time when transmission ends, and the time when reception ends may be equal to the time when transmission ends. The data transmission end time may be determined based on the data transmission start time and the data transmission duration. The forwarding delay can be understood as the time required for the periodic traffic to be forwarded at the node.
In this step, the data transmission information of the current node may be determined based on the received data transmission information, and the received data transmission information may be the data transmission information of the current node, or may also be the data transmission information of a node other than the current node, such as the data transmission information of the previous node. The data transmission information of the current node may be considered as data transmission information required for the current node to perform periodic service transmission, that is, the current node performs periodic service transmission based on the data transmission information. The current node may be considered to be the node in the current system that determines the data transfer information. After the current node determines the data transmission information of the current node, the periodic service may be transmitted based on the transmission information of the current node. Before the periodic service transmission, each node device in the system has determined the corresponding data transmission information.
In the case that the obtained data transmission information is data transmission information of a node other than the current node, the data transmission information of the current node may be determined based on the data transmission information, such as determining the data transmission information of the current node based on the received data transmission information and the first transmission attribute information. The first transmission attribute information includes one or more of: a first transmission delay between a previous node and a current node; a first transmission rate of the current node and a next node; a second transmission rate of the current node and the previous node. The first transmission attribute information may be considered as attribute information in a periodic service transmission process.
It should be noted that "first" and "second" and the like in the present application are only used for distinguishing corresponding contents. Illustratively, the first transmission rate may be considered as a transmission rate at which the current node transmits data with the next node. The second transmission rate may be considered as a transmission rate at which the current node transmits data with the previous node. The previous node and the next node may be considered to be determined based on the data transmission information transmission direction. For example, between two adjacent nodes, a node sending data transmission information may be considered as a previous node or an upstream node, and a node receiving data transmission information may be considered as a next node or a downstream node.
Under the condition that the current node is the source end node, the source end node can determine corresponding data transmission information according to actual requirements and then transmit the data transmission information to the next node or the controller. The source end node may perform transmission of the periodic service based on the data transmission information of the source end node after the terminal node determines the corresponding data transmission information (that is, each node device in the system acquires its own data transmission information).
When the current node is an intermediate node, the intermediate node may acquire data transmission information sent by a previous node or a controller, and then send the data transmission information of itself, data transmission information of a next node, or quasi-data transmission information of the next node to the next node or the controller after determining the data transmission information of itself based on the acquired data transmission information.
In the case that the current node is a terminal node, the terminal node may receive data transmission information sent by a previous node or a controller to determine its own data transmission information, and then perform transmission of a periodic service.
And S120, transmitting the periodic service based on the data transmission information of the current node.
The periodic traffic may be delay sensitive traffic, such as time sensitive network traffic.
After determining the data transmission information of the current node, this step may perform transmission of the periodic service based on the data transmission information. If the current node is a source end node, the terminal node can send periodic service after determining corresponding data transmission information; when the current node is the intermediate node, the periodic service can be forwarded; and receiving the periodic service under the condition that the current node is the terminal node. Specifically, the current node determines a start reception time, a stop reception time, a start transmission time, and a stop transmission time of the periodic traffic, to start forwarding the periodic traffic based on the start reception time and the start transmission time, and to end forwarding the periodic traffic based on the end reception time and the end transmission time.
Each node device in the system for transmitting the periodic service may first determine respective data transmission information before transmitting the periodic service, and then perform transmission of the periodic service based on the data transmission information, thereby reducing forwarding delay generated in the process of transmitting the periodic service.
The application provides a periodic service transmission method, which comprises the steps of firstly determining data transmission information of a current node; and then, based on the data transmission information of the current node, carrying out the transmission of periodic service. By using the method, the forwarding time delay is effectively reduced, the low-time-delay transmission of the periodic service is realized, and the efficiency of the periodic service transmission is improved.
On the basis of the above-described embodiment, a modified embodiment of the above-described embodiment is proposed, and it is to be noted herein that, in order to make the description brief, only the differences from the above-described embodiment are described in the modified embodiment.
In one embodiment, in a case that the current node is a non-source end node, the determining data transmission information of the current node includes:
acquiring data transmission information sent by a previous node or a controller;
determining the data transmission information of the current node based on the acquired data transmission information and the first transmission attribute information under the condition that the acquired data transmission information is not the data transmission information of the current node;
wherein the first transmission attribute information includes one or more of: a first transmission delay between a previous node and a current node; a first transmission rate of the current node and a next node; a second transmission rate of the current node and the previous node.
When determining the data transmission information of the current node, the method and the device can determine the data transmission information based on the acquired data transmission information. In the case where the current node is a non-source end node, the current node may obtain data transmission information from a previous node or a controller. The acquired data transmission information may be data transmission information of the current node, or may also be data transmission information of a node other than the current node, such as data transmission information of the previous node.
In a case where the acquired data transmission is data transmission information of a node other than the current node, the data transmission information of the current node may be determined based on the acquired data transmission information and the first transmission attribute information. Specifically, the data transmission information of the current node is determined based on the first transmission delay, the first transmission rate, the second transmission rate, and the acquired data transmission information.
The first transmission rate may be considered as a rate at which the current node transmits data to the next node. The second transmission rate may be considered a rate at which the previous node transmits data to the current node.
It should be noted that the controller may receive data transmission information of the source end node, determine the data transmission information of each node device based on the transmission delay between each node device, and then send the determined data transmission information to the corresponding node device, so that the node device performs transmission of the periodic service.
In one embodiment, determining the data transmission information of the current node based on the acquired data transmission information and the first transmission attribute information comprises:
determining the data transmission information of the current node based on the acquired data transmission information, the first transmission rate, the second transmission rate and the forwarding delay included in the acquired data transmission information under the condition that the acquired data transmission information is the quasi data transmission information of the current node; the quasi data transmission information of the current node is determined based on the data transmission information of the previous node and the first transmission delay.
When determining the data transmission information of the current node, it may first determine whether the acquired data transmission information is the data transmission information of the current node, where the determination means is not limited, such as indicating the node device to which the data transmission information belongs through the identification information. If the identification information uniquely identifies the acquired data transmission information, the data transmission information of the previous node, the data transmission information of the current node or the quasi data transmission information of the current node is acquired.
When the acquired data transmission information is the data transmission information of the current node, the periodic service can be directly transmitted based on the data transmission information; in the case that the acquired data transmission information is quasi-data transmission information of the current node, the current node may directly compare the first transmission rate and the second transmission rate to adjust the acquired data transmission information, and the forwarding information may be used as a limitation of the adjustment when adjusting the acquired data transmission information.
Specifically, under the condition that the first transmission rate is equal to the second transmission rate, the interval between the data transmission start time and the data transmission end time is unchanged, the data transmission period is unchanged, and the data transmission duration is unchanged; under the condition that the first transmission rate is greater than the second data rate, the interval between the data transmission starting time and the data transmission ending time is increased, the data transmission period is increased, and the data transmission duration is increased; and under the condition that the first transmission rate is less than the second data rate, the interval between the data transmission starting time and the data transmission ending time is reduced, the data transmission period is reduced, and the data transmission duration is reduced. The change of the information in the acquired data transmission information is limited by the forwarding delay, that is, the forwarding delay generated by the data transmission information of the current node is smaller than the forwarding delay included in the acquired data transmission information. The specific value of the forwarding delay included in the data transmission information is not limited herein, and those skilled in the art can set the value according to the actual communication requirement.
In one embodiment, determining the data transmission information of the current node based on the acquired data transmission information and the first transmission attribute information comprises:
adjusting the acquired data transmission information based on a first transmission delay to obtain quasi data transmission information of the current node under the condition that the acquired data transmission information is data transmission information of a previous node;
and determining the data transmission information of the current node based on the quasi data transmission information of the current node, the second transmission rate, the first transmission rate and the forwarding time delay included in the acquired data transmission information.
Under the condition of determining the quasi data transmission information of the current node, the first transmission delay may be added to the data transmission start time and the data transmission end time corresponding to the acquired data transmission information, respectively. The data transmission start time and the data transmission end time may be included in the acquired data transmission information, or may be determined based on a data transmission period and/or a data transmission duration included in the acquired data transmission information. The data transmission period may be considered as a period of periodic service transmission, and the data transmission duration may be considered as a duration of periodic service transmission.
The specific means for determining the data transmission information of the current node based on the quasi data transmission information is not limited herein, and reference may be made to the specific means for determining the data transmission information of the current node based on the quasi data transmission information in the above embodiments.
In one embodiment, the data transmission information includes one or more of: a data transmission start time; a data transmission end time; a data transmission period; a data transmission duration; and (5) forwarding time delay.
The forwarding delay can be used for the current node to determine the data transmission information. In addition, when the current node acquires at least two pieces of data transmission information, the data transmission information is used as an index for adjusting the data transmission information to ensure that the adjusted data transmission information meets the requirement of forwarding delay under the condition of no conflict, namely the forwarding delay generated by the adjusted data transmission information is smaller than the forwarding delay included by the corresponding acquired data transmission information.
In one embodiment, the method further comprises:
sending the data transmission information to a next node or a controller under the condition that the current node is a non-terminal node; or, sending data transmission information of the next node to the next node; or sending the quasi data transmission information of the next node to the next node or a controller.
And under the condition that the current node is a non-terminal node, the data transmission information can be sent to the next node, so that the next node can determine the data transmission information of the next node based on the data transmission information to perform the transmission of the periodic service.
When the current node is a non-terminal node, the data transmission information of the next node may be sent to the next node or the controller, so that the next node may perform periodic service transmission based on the data transmission information of the next node.
In the case that the current node is a non-terminal node, the quasi data transmission information of the next node may be sent to the next node or the controller to determine the data transmission information of the next node.
After receiving the corresponding information, the controller may directly forward the information to the corresponding node device, or may determine data transmission information of the corresponding node device and send the information to the corresponding node device. The technical means for the controller to determine the data transmission information of the corresponding node device is not limited and may be referred to the above embodiments.
In one embodiment, before sending the data transmission information of the next node to the next node, the method further includes:
determining data transmission information of a next node based on the data transmission information of the current node and second transmission attribute information;
wherein the second transmission attribute information includes one or more of: a second transmission delay between the current node and the next node; a first transmission rate; a third transmission rate of the next node and the next node.
The technical means for determining the data transmission information of the next node may refer to the technical means for determining the data transmission information of the current node, which is not described herein again.
In one embodiment, before sending the quasi data transmission information of the next node to the next node or the controller, the method further includes:
and determining quasi data transmission information of the next node based on the data transmission information of the current node and the second transmission delay.
The technical means for determining the quasi data transmission information of the next node may refer to the technical means for determining the quasi data transmission information of the current node, which is not described herein again.
In one embodiment, the transmitting of the periodic traffic based on the data transmission information of the current node includes:
receiving and sending the forwarding periodic service based on the data transmission starting time corresponding to the data transmission information of the current node;
and stopping receiving and sending the forwarding periodic service based on the data transmission ending time corresponding to the data transmission information of the current node.
In one embodiment, in a case that the data transmission information acquired by the current node includes at least two, and each of the acquired data transmission information conflicts, the method further includes:
adjusting the acquired data transmission information to obtain adjusted data transmission information; or the like, or, alternatively,
transmitting the acquired data transmission information to a controller, and receiving the data transmission information adjusted by the controller;
the adjusted data transmission information is not conflicted, and the forwarding delay generated by the adjusted data transmission information is not more than the forwarding delay included by the corresponding acquired data transmission information.
The specific means for adjusting each acquired data transmission information by the current node is not limited, as long as it is ensured that the adjusted data transmission information does not conflict, and the forwarding delay generated by the adjusted data transmission information is not greater than the forwarding delay included in the corresponding acquired data transmission information.
The current node may also transmit the acquired data transmission information to the controller for adjustment by the controller. The way the controller adjusts can be seen in the way the current node adjusts.
In one embodiment, in a case that the current node or the controller cannot determine the adjusted data transmission information, the method further includes:
sending a change request to a previous node corresponding to at least one piece of acquired data transmission information, and continuing to execute an operation of determining the data transmission information of the current node, wherein the change request indicates the previous node to change the corresponding data transmission information, and the change request includes one of the following: a recommended start time and a recommended end time.
When the current node or the controller cannot determine the adjusted data transmission information, a change request may be sent to a previous node corresponding to at least one piece of data transmission information in the acquired data transmission information to control the previous node to adjust the corresponding data transmission information, and then an operation of determining the data transmission information of the current node is performed to determine the data transmission information of the current node, so that the data transmission information acquired again by the current node does not conflict.
The proposed start time may be a proposed new data transmission start time. The proposed end time may be a proposed new data transmission end time.
For example, when the current node may adjust each acquired data transmission information based on each acquired data transmission information and the corresponding first transmission attribute information, so that the adjusted data transmission information does not conflict. The adjustment means is not limited here, as long as the adjusted data transmission information does not conflict and the requirement of the forwarding delay is satisfied.
In one embodiment, the method further comprises:
receiving a change request sent by a next node;
and adjusting the data transmission information of the current node based on the change request.
After the current node receives the change request sent by the next node, the data transmission information of the current node can be directly adjusted based on the change request so as to ensure that no conflict occurs in the follow-up process.
In one embodiment, before determining the data transmission information of the current node, the method further includes:
synchronizing a clock and time;
first transmission attribute information and second transmission attribute information are determined.
Before acquiring the data transmission information, the time and the clock can be synchronized, such as the clock and the time of each node device in a system for synchronously transmitting the periodic service. The current node can synchronize the clock and time with the previous node and the next node.
After time and clock synchronization, the first transmission attribute information and the second transmission attribute information may be determined. The determination means may determine based on the content included in the first transmission attribute information and the second transmission attribute information, and is not limited herein.
In one embodiment, acquiring the transmission delay with the previous node comprises:
receiving a first test message sent by a previous node, wherein the first test message comprises first sending time;
feeding back first response information to the previous node, wherein the first response information comprises first processing time, and receiving transmission delay fed back by the previous node, and the transmission delay is determined by the previous node based on the first sending time, the first processing time and the receiving time for receiving the first response information; or, determining a transmission delay based on the first sending time and the receiving time of the first test message.
In one embodiment, a second test message is sent to a next node, the second test message including a second send time;
receiving second response information fed back by the next node, wherein the second response information comprises second processing time;
determining a transmission delay with the next node based on the second sending time, the second processing time and the receiving time of the second response message;
and sending the transmission delay to the next node.
The "first" and "second" in this application are only used for distinguishing corresponding contents, such as the first test message and the second test message, and are only used for distinguishing test messages, such as the first test message is a test message sent by a previous node to a current node. The second test message is a test message that the current node sends to the next node.
The test message may include a first test message and a second test message, and the test message may be considered as a trigger message for testing the transmission delay. The transmission time includes a first transmission time and a second transmission time. The first transmission time may be considered as the time when the last node transmitted the first test message. The second transmission time may be considered as the time when the current node transmits the second test message.
The first response information may be information that the current node responds to the first test message sent by the previous node. The first processing time may be considered as the time at which the current node processes the first test message. The second response information may be information that a next node responds to the second test message sent by the current node. The second processing time may be a time when the next node processes the second test message.
When determining the transmission delay with the previous node, the current node may directly receive the transmission delay determined by the previous node, or may determine the transmission time based on the first sending time and the receiving time of the first test message, for example, determine the transmission delay as the receiving time of the first test message minus the first sending time.
When the current node determines the transmission time with the next node, one half of the result of subtracting the second processing time from the second transmission time subtracted from the reception time of the second response information may be determined as the transmission delay with the next node.
The following describes an exemplary method for transmitting periodic traffic according to the present application,
the periodic service transmission method described in the present application may be regarded as a method for a PON system to carry periodic TSN services. Fig. 1a is a schematic diagram of a TSN service provided in the present application. As shown in FIG. 1a, TSN traffic is sent and transmitted periodically, such as Q in FIG. 1a3，t0Is the data transmission time. Q0、Q1And Q2As other data.
In the PON system, in the downstream direction, the OLT may implement periodic scheduling to implement periodic transmission of data, and in the upstream direction, the ONU may obtain periodic bandwidth allocation to implement periodic transmission of data.
However, the PON system needs to identify and strictly match the periodic characteristics of the TSN service, such as the data transmission start time, the data transmission end time, and the data transmission period, and on this basis, the PON system can seamlessly forward the TSN service, thereby implementing low-delay transmission of the TSN service. If the periodic characteristics of the TSN Service are not strictly matched, for example, the PON system has matched the period of the TSN Service, but the data transmission start time of the TSN Service is not matched, the PON system cannot predict when the TSN Service arrives, the TSN Service needs to be cached in the PON system or the device, which causes delay, and in different scenarios, the forwarding delay is different and uncertain, which may affect the quality of Service (QoS) of the TSN Service.
How to seamlessly connect and cooperate the TSN service with the PON system to achieve minimum and stable transmission delay of the TSN service in the PON system is a problem that needs to be mainly solved by the present application.
Fig. 1b is a schematic diagram of a work flow of seamless matching of periodic traffic provided in the present application, and referring to fig. 1b, a node device for transmitting TSN traffic may include: central Unit (CU)/Distribution Unit (DU), OLT, ONU, and Remote Unit (RU). Wherein a CU/DU or RU may be a source node. The following functions need to be supported between node devices transmitting TSN traffic, especially between adjacent node devices transmitting TSN traffic:
(1) all node devices need to perform clock (frequency and phase) and time synchronization;
(2) the transmission delay test is needed among the node devices, particularly among the adjacent node devices, and if the transmission delay is needed to be shared among the node devices. The transmission time between the transmission devices is used for each node device to calculate the update of the data transmission plan (namely the data transmission information) after the data transmission plan arrives;
(3) the node devices, especially the adjacent node devices, perform data transmission plan interaction, and the data transmission plan content includes data transmission start time, data transmission end time, data transmission period and other contents. In particular, in the PON system, a data transmission plan from an ONU to an OLT requires the ONU to apply to the OLT and the OLT to allocate a bandwidth supporting the data transmission plan to the ONU. The data transmission plan may be a transmission plan of the source node (the end node calculates a reception plan based on the transmission delay test result), or may be a reception plan of the end node (the source node calculates a reception plan of the end node based on the transmission delay test result). The source node may be a node that transmits data transmission information among two node devices performing data transmission. The end node may be a node that receives data transmission information from two node devices that perform data transmission.
When the current node is the OLT, the previous node, that is, the ONU sends bandwidth application information to the OLT to instruct the OLT to allocate a bandwidth supporting a data transmission plan to the ONU. And then receiving the bandwidth information fed back by the last node, and transmitting a data transmission plan based on the bandwidth information.
The transmitting device may be considered a node device that performs data transmission.
In one example, the end node may determine a receiving plan, i.e., data transmission information of the end node, according to the transmission delay test result, i.e., the transmission delay, the transmission rate, and the received data transmission plan.
(4) The node equipment transmits data according to a data transmission plan for realizing interactive completion preparation, prepares data forwarding at the data transmission starting time in advance according to the data transmission plan, and schedules the forwarding of other data at the data transmission ending time in advance. According to the data transmission plan, the buffering time of the data in each node device in the transmission process is minimized. The other data may be data other than periodic traffic.
The clock and time synchronization between the node devices can be accomplished through one or more technologies of 1588, synchronous ethernet and 802.1 AS.
The conflict processing exists in a plurality of data transmission plans: in an aggregation device (i.e., a device in which a plurality of previous nodes transmit data transmission information), for example, an OLT may receive a plurality of data transmission plans that overlap, and the aggregation device needs to arrange the data transmission plans by calculation so that the data transmission plans do not overlap after being output by the aggregation device, and even so that data forwarding delay in each data transmission plan is within a specified range.
If some convergence devices have limited computing power, for example, when an ONU has multiple RUs connected downstream, the ONU is a convergence device, but due to cost factors, the ONU may upload the data transmission plans to a device with higher computing power to perform computation, for example, the ONU may upload the data transmission plans to the OLT or the controller, and the OLT or the controller may perform computation and then return the adjusted data transmission plans to the ONU.
Feedback mechanism for data transmission plan: when a certain node device cannot arrange a data transmission plan of an upstream node device, feedback can be provided to the upstream node device, and the upstream node device is recommended to change the data transmission plan.
Expression of data transfer plan: the periodic characteristics generally include a data transmission start time, a data transmission end time, and a data transmission period, and may vary, for example, the data transmission start time, the data transmission duration, the data transmission period, and the like. In addition, in order to provide an adjustment basis when the data transmission plan conflicts, the data transmission plan may further include a maximum acceptable forwarding delay. After the node device obtains the data transmission plan of the upstream node device, it needs to adjust the data transmission plan by combining its own characteristics, such as the transmission rate to the next node device, and then sends it to the next node device.
Interactive protocol encapsulation for data transmission plan: the determination may be made according to a specific interface between node devices, for example, a PLOAM message format may be used between the OLT and the ONU, and an ethernet Operation and Maintenance Administration (OAM) or a custom interface may be used between the ONU and the RU.
Fig. 1c is a schematic flowchart of a transmission delay determining method provided by the present application, and fig. 1d is a schematic flowchart of another transmission delay determining method provided by the present application. Referring to fig. 1c and fig. 1d, the transmission delay test between node devices includes the following two modes:
in the first method, a source node, that is, a node 1, sends a test message to a destination node, that is, a node 2, and records a sending time t0, the destination node sends a test response to the source node after receiving the test message, the destination node may carry a local processing time Td of the destination node in the test response, and the source node records a receiving time t1 after receiving the test response, and then the transmission delay D is (t1-t 0-Td)/2. The method is suitable for transmission symmetric networks.
In the second method, the source node, i.e., node 1, sends a test message to the destination node, i.e., node 2, where the test message carries the sending time t0, and the destination node records the receiving time t1 after receiving the test message, and then the transmission time D is (t1-t 0). This approach requires that the node devices have completed clock synchronization and time synchronization.
In an embodiment, fig. 1e is a schematic diagram of a transmission manner of data transmission information provided by the present application; fig. 1f is a schematic diagram of another transmission method of data transmission information provided in the present application; fig. 1g is a schematic diagram of another transmission method of data transmission information provided in the present application, and the interaction of data transmission plans (i.e. data transmission information) between node devices may be implemented in the following three ways:
method I, directly carrying out data transmission plan interaction between node devices
Referring to fig. 1e, the data transmission plan is initiated by the node device at the source of the data (i.e., the source end node), sent to the next node device, and sent by the next node device to the next node device, and so on. The data transmission plans for the interaction of the node devices may be the same or different. Each node device may send its own data transmission information, data transmission information of the next node, or quasi data transmission information of the next node to the next node device. Wherein node 1 may be a source node and node 4 may be a destination node.
Referring to fig. 1f, node devices perform data transmission plan interaction through a controller, and a data transmission plan is initiated by a node device at a data source, sent to the controller, and forwarded to each node device by the controller. The data transmission information forwarded by the controller to each node device may be data transmission information of each node device itself. The controller may determine data transfer information for each node device based on the data transfer information of the source end node.
The node devices may forward data transmission information in two ways, which are shown in fig. 1e and fig. 1 f. Specifically, the data transmission information of some node devices in the system is transmitted in a node-by-node manner, that is, in the manner shown in fig. 1e, and the data transmission information of the remaining node devices is transmitted in a manner forwarded by the controller, as shown in fig. 1 f. Referring to fig. 1g, the data transmission information of the node 2 may be transmitted by means of inter-node forwarding, and the data transmission information of the nodes 3 and 4 may be forwarded by the controller.
After obtaining the data transmission plan, each node device can perform data transmission.
After the data transmission plan is obtained by each node device, data receiving and sending are prepared in advance, and the received data can be sent out immediately, so that the caching time of the data at each node is as small as possible, even 0.
Each node device accurately masters a data transmission plan including information such as data transmission start time, data transmission end time, data transmission period and the like, sets data transmission according to the information, and prepares data sending time and end time in advance, so that the caching time of data in the node is as low as possible or even 0.
Fig. 2 is a schematic structural diagram of a periodic service transmission apparatus provided in the present application, the apparatus being configured at a communication node, see fig. 2, and the apparatus including:
a determining module 21 configured to determine data transmission information of a current node;
and the transmission module 22 is configured to transmit the periodic service based on the data transmission information of the current node.
The periodic service transmission apparatus provided in this embodiment is used to implement the periodic service transmission apparatus method according to this embodiment, and the implementation principle and technical effect of the periodic service transmission apparatus provided in this embodiment are similar to those of the periodic service transmission apparatus method according to this embodiment, and are not described here again.
On the basis of the above-described embodiment, a modified embodiment of the above-described embodiment is proposed, and it is to be noted herein that, in order to make the description brief, only the differences from the above-described embodiment are described in the modified embodiment.
In an embodiment, in a case that the current node is a non-source end node, the determining module 21 is specifically configured to:
acquiring data transmission information sent by a previous node or a controller;
determining the data transmission information of the current node based on the acquired data transmission information and the first transmission attribute information under the condition that the acquired data transmission information is not the data transmission information of the current node;
wherein the first transmission attribute information includes one or more of: a first transmission delay between a previous node and a current node; a first transmission rate of the current node and a next node; a second transmission rate of the current node and the previous node.
In one embodiment, the determining module 21 determines the data transmission information of the current node based on the acquired data transmission information and the first transmission attribute information, including:
determining the data transmission information of the current node based on the acquired data transmission information, the first transmission rate, the second transmission rate and the forwarding delay included in the acquired data transmission information under the condition that the acquired data transmission information is the quasi data transmission information of the current node; the quasi data transmission information of the current node is determined based on the data transmission information of the previous node and the first transmission delay.
In one embodiment, the determining module 21 determines the data transmission information of the current node based on the acquired data transmission information and the first transmission attribute information, including:
adjusting the acquired data transmission information based on a first transmission delay to obtain quasi data transmission information of the current node under the condition that the acquired data transmission information is data transmission information of a previous node;
and determining the data transmission information of the current node based on the quasi data transmission information of the current node, the second transmission rate, the first transmission rate and the forwarding time delay included in the acquired data transmission information.
In one embodiment, the data transmission information includes one or more of: a data transmission start time; a data transmission end time; a data transmission period; a data transmission duration; and (5) forwarding time delay.
In one embodiment, the apparatus further comprises a sending module configured to:
sending the data transmission information to a next node or a controller under the condition that the current node is a non-terminal node; or, sending data transmission information of the next node to the next node; or sending the quasi data transmission information of the next node to the next node or a controller.
In one embodiment, the apparatus further comprises: a first module configured to determine data transmission information of a next node based on the data transmission information of the current node and second transmission attribute information before transmitting the data transmission information of the next node to the next node;
wherein the second transmission attribute information includes one or more of: a second transmission delay between the current node and the next node; a first transmission rate; a third transmission rate of the next node and the next node.
In one embodiment, the apparatus further comprises: and the second module is set to determine the quasi data transmission information of the next node based on the data transmission information of the current node and the second transmission time delay before sending the quasi data transmission information of the next node to the next node or the controller.
In one embodiment, the transmission module 22 is configured to:
starting to forward the periodic service based on the data transmission starting time corresponding to the data transmission information of the current node;
and stopping forwarding the periodic service based on the data transmission ending time corresponding to the data transmission information of the current node.
In one embodiment, the apparatus further comprises: the adjusting module is configured to adjust the acquired data transmission information to obtain adjusted data transmission information when the data transmission information acquired by the current node includes at least two data transmission information and the acquired data transmission information conflicts; or the like, or, alternatively,
transmitting the acquired data transmission information to a controller, and receiving the data transmission information adjusted by the controller;
the adjusted data transmission information is not conflicted, and the forwarding delay generated by the adjusted data transmission information is not more than the forwarding delay included by the corresponding acquired data transmission information.
In one embodiment, the apparatus further comprises: a change module configured to, under a condition that the current node or the controller cannot determine the adjusted data transmission information, send a change request to a previous node corresponding to at least one piece of data transmission information in the acquired data transmission information, and continue to perform an operation of determining the data transmission information of the current node, where the change request indicates the previous node to change the corresponding data transmission information, and the change request includes one of: a recommended start time and a recommended end time.
In one embodiment, the apparatus further comprises: a receiving module configured to:
receiving a change request sent by a next node;
and adjusting the data transmission information of the current node based on the change request.
In one embodiment, the apparatus further comprises: the synchronization module is configured to: synchronizing a clock and time before determining data transmission information of a current node; first transmission attribute information and second transmission attribute information are determined.
Fig. 3 is a schematic structural diagram of a communication node provided in the present application, and as shown in fig. 3, the communication node provided in the present application includes one or more processors 51 and a storage device 52; the processor 51 in the communication node may be one or more, and one processor 51 is taken as an example in fig. 3; storage 52 is used to store one or more programs; the one or more programs are executed by the one or more processors 51, so that the one or more processors 51 implement the method as described in fig. 1 in the embodiments of the present application.
The communication node further comprises: a communication device 53, an input device 54 and an output device 55.
The processor 51, the storage means 52, the communication means 53, the input means 54 and the output means 55 in the communication node may be connected by a bus or other means, which is exemplified in fig. 3.
The input device 54 may be used to receive entered numeric or character information and to generate key signal inputs relating to user settings and function control of the communication node. The output device 55 may include a display device such as a display screen.
The communication means 53 may comprise a receiver and a transmitter. The communication device 53 is configured to perform information transceiving communication according to the control of the processor 51. Information includes, but is not limited to, data transmission information and periodic traffic.
The storage device 52, which is a computer-readable storage medium, can be configured to store software programs, computer-executable programs, and modules, such as program instructions/modules corresponding to the method described in fig. 1 in this application (e.g., the determining module 21 and the transmitting module 22 in the periodic traffic transmitting device). The storage device 52 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to use of the communication node, and the like. Further, the storage 52 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, the storage 52 may further include memory located remotely from the processor 51, which may be connected to the communication node over a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
An embodiment of the present application further provides a storage medium, where the storage medium stores a computer program, and the computer program, when executed by a processor, implements the periodic service transmission method according to the embodiment of the present application, where the method includes:
determining data transmission information of a current node;
and carrying out the transmission of the periodic service based on the data transmission information.
The computer storage media of the embodiments of the present application may take any combination of one or more computer-readable media. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a Read Only Memory (ROM), an Erasable Programmable Read Only Memory (EPROM), a flash Memory, an optical fiber, a portable CD-ROM, an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. A computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
A computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take a variety of forms, including, but not limited to: an electromagnetic signal, an optical signal, or any suitable combination of the foregoing. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wire, fiber optic cable, Radio Frequency (RF), etc., or any suitable combination of the foregoing.
Computer program code for carrying out operations for aspects of the present application may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C + +, and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).
The above description is only exemplary embodiments of the present application, and is not intended to limit the scope of the present application.
It will be clear to a person skilled in the art that the term user equipment covers any suitable type of wireless user equipment, such as mobile phones, portable data processing devices, portable web browsers or vehicle-mounted mobile stations.
In general, the various embodiments of the application may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. For example, some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device, although the application is not limited thereto.
Embodiments of the application may be implemented by a data processor of a mobile device executing computer program instructions, for example in a processor entity, or by hardware, or by a combination of software and hardware. The computer program instructions may be assembly instructions, Instruction Set Architecture (ISA) instructions, machine-related instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages.
Any logic flow block diagrams in the figures of this application may represent program steps, or may represent interconnected logic circuits, modules, and functions, or may represent a combination of program steps and logic circuits, modules, and functions. The computer program may be stored on a memory. The Memory may be of any type suitable to the local technical environment and may be implemented using any suitable data storage technology, such as, but not limited to, Read-Only Memory (ROM), Random Access Memory (RAM), optical storage devices and systems (Digital Video Disc (DVD) or Compact Disc (CD)), etc. The computer readable medium may include a non-transitory storage medium. The data processor may be of any type suitable to the local technical environment, such as but not limited to general purpose computers, special purpose computers, microprocessors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Programmable logic devices (FGPAs), and processors based on a multi-core processor architecture.
The foregoing has provided by way of exemplary and non-limiting examples a detailed description of exemplary embodiments of the present application. Various modifications and adaptations to the foregoing embodiments may become apparent to those skilled in the relevant arts in view of the drawings and the following claims without departing from the scope of the invention. Accordingly, the proper scope of the application is to be determined according to the claims.

Claims (16)

1. A method for periodic traffic transmission, comprising:
determining data transmission information of a current node;
and transmitting the periodic service based on the data transmission information of the current node.
2. The method of claim 1, wherein in the case that the current node is a non-source end node, the determining the data transmission information of the current node comprises:
acquiring data transmission information sent by a previous node or a controller;
determining the data transmission information of the current node based on the acquired data transmission information and the first transmission attribute information under the condition that the acquired data transmission information is not the data transmission information of the current node;
wherein the first transmission attribute information includes one or more of: a first transmission delay between a previous node and a current node; a first transmission rate of the current node and a next node; a second transmission rate of the current node and the previous node.
3. The method of claim 2, wherein determining the data transmission information of the current node based on the acquired data transmission information and the first transmission attribute information comprises:
determining the data transmission information of the current node based on the acquired data transmission information, the first transmission rate, the second transmission rate and the forwarding delay included in the acquired data transmission information under the condition that the acquired data transmission information is the quasi data transmission information of the current node; the quasi data transmission information of the current node is determined based on the data transmission information of the previous node and the first transmission delay.
4. The method of claim 2, wherein determining the data transmission information of the current node based on the acquired data transmission information and the first transmission attribute information comprises:
adjusting the acquired data transmission information based on a first transmission delay to obtain quasi data transmission information of the current node under the condition that the acquired data transmission information is data transmission information of a previous node;
and determining the data transmission information of the current node based on the quasi data transmission information of the current node, the second transmission rate, the first transmission rate and the forwarding time delay included in the acquired data transmission information.
5. The method of claim 1, wherein the data transmission information comprises one or more of: a data transmission start time; a data transmission end time; a data transmission period; a data transmission duration; and (5) forwarding time delay.
6. The method of claim 1, further comprising:
sending the data transmission information to a next node or a controller under the condition that the current node is a non-terminal node; or, sending data transmission information of the next node to the next node; or sending the quasi data transmission information of the next node to the next node or a controller.
7. The method of claim 6, further comprising, before sending data transmission information of a next node to the next node:
determining data transmission information of a next node based on the data transmission information of the current node and second transmission attribute information;
wherein the second transmission attribute information includes one or more of: a second transmission delay between the current node and the next node; a first transmission rate; a third transmission rate of the next node and the next node.
8. The method of claim 6, further comprising, before sending the quasi data transmission information of the next node to a next node or a controller:
and determining quasi data transmission information of the next node based on the data transmission information of the current node and the second transmission delay.
9. The method of claim 1, wherein the performing the transmission of the periodic traffic based on the data transmission information of the current node comprises:
starting to forward the periodic service based on the data transmission starting time corresponding to the data transmission information of the current node;
and stopping forwarding the periodic service based on the data transmission ending time corresponding to the data transmission information of the current node.
10. The method according to claim 1, wherein in case that the data transmission information acquired by the current node includes at least two, and the acquired data transmission information conflicts, further comprising:
adjusting the acquired data transmission information to obtain adjusted data transmission information; or the like, or, alternatively,
transmitting the acquired data transmission information to a controller, and receiving the data transmission information adjusted by the controller;
the adjusted data transmission information is not conflicted, and the forwarding delay generated by the adjusted data transmission information is not more than the forwarding delay included by the corresponding acquired data transmission information.
11. The method of claim 10, wherein in case the current node or controller cannot determine the adjusted data transmission information, further comprising:
sending a change request to a previous node corresponding to at least one piece of acquired data transmission information, and continuing to execute an operation of determining the data transmission information of the current node, wherein the change request indicates the previous node to change the corresponding data transmission information, and the change request includes one of the following: a recommended start time and a recommended end time.
12. The method of claim 1, further comprising:
receiving a change request sent by a next node;
and adjusting the data transmission information of the current node based on the change request.
13. The method of claim 1, prior to determining data transmission information for a current node, further comprising:
synchronizing a clock and time;
first transmission attribute information and second transmission attribute information are determined.
14. A periodic traffic transmission apparatus, comprising:
a determining module configured to determine data transmission information of a current node;
and the transmission module is set to transmit the periodic service based on the data transmission information of the current node.
15. A communications node, comprising:
one or more processors;
storage means for storing one or more programs;
when executed by the one or more processors, cause the one or more processors to implement the method of any one of claims 1-13.
16. A storage medium, characterized in that the storage medium stores a computer program which, when executed by a processor, implements the method of any one of claims 1-13.
CN202010268032.5A 2020-04-08 2020-04-08 Periodic service transmission method, device, communication node and storage medium Pending CN113497986A (en)

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