CN114697159B - Deterministic ping-pong transmission method in online centralized resource planning control mode - Google Patents
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Abstract
The invention belongs to the technical field of airborne bus communication in an airborne avionics system, and particularly relates to a deterministic ping-pong transmission method in an online centralized resource planning control mode. According to the method, global planning is carried out on the basis of high-precision network clock synchronization constructed by the system, so that a ping-pong gating list for service scheduling is constructed, a deterministic scheduling transmission mechanism of a deterministic network system is realized, contention-free transmission of time-aware scheduling TAS data streams in the network can be realized, transmission of bearer bandwidth reservation type services is realized by reserving bandwidth in ping-pong gating time slots, and therefore, the integration of bandwidth reservation type data streams and TAS type data streams on the same physical link is realized.
Description
Technical Field
The invention belongs to the technical field of airborne bus communication in an airborne avionics system, and particularly relates to a deterministic ping-pong transmission method in an online centralized resource planning control mode.
Background
The existing mainstream airborne bus network adopts an event-triggered communication mechanism, so that an end system of the network can be accessed for communication at any time, messages can be sent, transmission competition is inevitably caused, uncontrollable delay and jitter are brought to end-to-end data stream transmission, and the requirements of a novel avionic system on distributed communication application related to different time criticality and safety cannot be met. The Time Triggered Ethernet (TTE) belongs to a new generation of aviation onboard bus under a time triggered architecture, a global network synchronous clock is established on the basis of introducing a clock synchronous mechanism, and contention-free time triggered TT frame communication is ensured through a deterministic time triggered communication mechanism, so that the time certainty and instantaneity of network communication are greatly improved; meanwhile, the transmission of event-triggered communication frames is supported, and the application task integration of different time criticality levels is met. However, the TTE technology system is characterized in that the time slots of the communication bandwidth are divided by time division multiplexing multiple access (TDMA) and mapped to each message flow at a fine granularity, and the applications of the corresponding types of the system are required to be bound in a strong coupling way, so that the time trigger TT service borne by the system is too closed, the space for flexible design is lost, and the integration and iterative maintenance of the system under the airborne environment with various working modes are not facilitated. In the future intelligent airborne system, the network architecture design and application requirements are met, certain certainty and reliability are needed for data collection, processing and exchange of intelligent avionics under the communication architecture scene of hierarchical multi-service integration, certain openness and flexibility are needed, communication resource reconstruction and migration planning exist for the system requirements and the working modes with multiple ends of continuous iterative updating, and a deterministic ping-pong transmission method with flexible dynamic access under the online centralized resource planning control mode facing to differentiated service scenes is needed.
Disclosure of Invention
The invention aims to: a deterministic ping-pong transmission method in an online centralized resource planning control mode is provided.
The technical scheme is as follows:
there is provided a deterministic ping-pong transmission method in an online centralized resource planning control mode, the method being performed based on an ethernet transmission system comprising a network resource planning controller, a communication node device, a communication link and a communication bridge, wherein the network resource planning controller is in communication connection with the communication node device and the communication bridge, and each bridge are connected with the communication node device through the communication link, the method comprising:
the network resource planning controller collects global communication information, wherein the global communication information comprises a core resource view;
the network resource planning controller plans deterministic ping-pong queue communication configuration step by step according to service source equipment and a relay network bridge based on the core resource view;
the network resource planning controller performs optimization iteration of a system level based on ping-pong queue communication configuration of step-by-step planning certainty, and finally obtains a deterministic ping-pong queue communication unified plan;
the network resource planning controller splits deterministic ping-pong queue communication unified planning into configuration files of each source communication node device, each relay network bridge device and each destination communication node device which are planned step by step, and distributes corresponding configuration file communication to each device of the time-sensitive deterministic Ethernet transmission system;
the source end communication node equipment and the relay network bridge equipment respectively arrange scheduling management of a scheduling queue of a time-aware service for the ping queue and the pong queue according to rules defined by configuration files;
the network resource controller rapidly decides to define a global scheduling time reference according to a synchronous global time base value constructed by first echelon equipment and distributes the global scheduling time reference to terminal node equipment and network bridge equipment, wherein the first echelon equipment refers to equipment which is electrified firstly and forms a synchronous set;
the network bridge carries out time slot gating management of the ping-pong scheduling queue of the equipment end according to the configuration file and the global scheduling time reference of the time sensitive deterministic Ethernet transmission system;
the terminal node equipment and the network bridge equipment edit a gating list according to the global scheduling time reference;
the source node equipment and the relay network bridge perform ping-pong queue operation by adopting switch control based on a gating list to perform communication scheduling according to scheduling management of scheduling queues of time-aware services.
Further, collecting global communication information specifically includes:
the method comprises the steps of deploying and accessing an Ethernet transmission system for communication in an independent hardware mode, and collecting global communication information in a self-learning route based on best effort BE service and a communication mode supporting plug and play; or alternatively
The communication is deployed in the form of software components and is connected to the Ethernet transmission system for communication, and global communication information is collected by means of communication node equipment or communication network bridging connection network.
Further, based on the core resource view, the deterministic ping-pong queue communication configuration is planned step by step according to the service source equipment and the relay network bridge, and the method specifically comprises the following steps:
planning service source equipment: the method comprises the steps that a hierarchical first communication resource set is adopted to describe global information collected on a communication node serving as a service source end, elements of the first communication resource set comprise application service throughput, service key characteristics, service period and time delay characteristics of the communication node, respective bandwidth capacity of differentiated input service, respective bandwidth capacity of differentiated output service, overall bandwidth capacity of the communication node and service transmission redundancy characteristics, and the service is distributed to a corresponding ping-pong gating queue or pong gating queue through the first communication resource set;
based on coarse granularity, dividing a service set of the source terminal device into: the method comprises the steps of performing duty ratio statistics on bandwidths of different service subsets at a source equipment port to preliminarily divide ping-pong gating periods and gating switch control points, and dividing service priorities based on fine granularity;
planning the network bridge equipment: describing global information collected by the network bridge by adopting a layered second communication resource set, wherein elements of the second communication resource set respectively correspond to a local network bridge service transmission path, respective bandwidth capacities of differentiated input services, respective bandwidth capacities of differentiated output services and overall bandwidth capacities of all ports of the network bridge;
and carrying out linkage distribution based on global information collected by the network bridge equipment and the planning state of the upper-level equipment.
Further, the communication distribution is realized based on a communication channel and an addressing mode of collecting global information from each device by a network resource controller.
Further, the source node device and the relay network bridge perform ping-pong queue operation by adopting switch control based on a gating list to perform communication scheduling according to scheduling management of a scheduling queue of time-aware service, specifically:
dividing the whole synchronous time axis into equal-length time slots from a global scheduling time reference, and sequentially numbering the time slots from zero, wherein the numbers are 0, 1, 2, 3, … i, i+1 …, j, j+1 and … in sequence; and scheduling according to the equal-length time slots.
Further, the terminal node equipment and the network bridge equipment edit a gating list according to the global scheduling time reference; the method comprises the following steps:
and editing a gating list mapping rule according to the parity characteristic of the time slot number value, wherein the gating list of the source terminal equipment and the relay network bridge consists of two time slot elements with adjacent number of the parity value.
Further, the source device scheduling period and each port scheduling period of the bridge are the sum of two time slot times of the gating list.
Further, the gating list mapping rule of the terminal includes:
a first mode: odd time slots of the number value are allocated to ping queue sending and pong queue receiving of the terminal, and even time slots of the number value are allocated to pong queue sending and ping queue receiving of the terminal; or alternatively
The second mode is as follows: even time slots of the number value are allocated to ping queue transmission and ping queue reception of the terminal, and even time slots of the number value are allocated to ping queue transmission and ping queue reception of the terminal.
Further, the gating list mapping rule of the bridge includes:
the gating list mapping rule of the bridge is defined by cooperating with the gating list mapping rule of the terminal, when the gating list mapping rule of the terminal is in a first mode, odd time slots of the number value are distributed to the ping-pong queue receiving and the pong queue sending of the bridge, and even time slots of the number value are distributed to the pong queue receiving and the ping-pong queue sending of the bridge;
when the gating list mapping rule of the terminal is the second mode, odd time slots of the number value are allocated to pong queue receiving and ping queue sending of the network bridge, and even time slots of the number value are allocated to ping queue receiving and ping queue sending of the network bridge.
The beneficial effects are that:
the resource planning controller for time sensitive deterministic Ethernet transmission is an indispensable component in the Ethernet transmission system, is embedded into each avionic communication subsystem, provides global resource allocation and communication logic relation planning mapping for connection between each communication subsystem and a network system switch, and realizes the resource requirements and transmission service characteristics of data transmission with different time criticality under the reliable configuration planning among network devices.
Drawings
Fig. 1 is a schematic diagram of an ethernet transmission system.
Detailed Description
The new generation mainstream avionics task system promotes the demands for flexibility and openness in system architecture and communication transmission service, the avionics system integration function domain is increased, the operational style of the task system is various, the change in the flying process brings about the change of system application and communication service organization logic, thereby providing great demands for online flexible planning and reconstruction of network architecture, application redeployment and migration, and the network configuration planning generated in the traditional offline planning mode is difficult to meet and suitable for the working scene of online on-demand distribution and online planning switching. The invention provides a deterministic ping-pong transmission method under an online centralized resource planning control mode, which is suitable for realizing on-line communication resource allocation and communication service logic planning of an avionics system based on time-sensitive deterministic Ethernet, and provides greater openness and flexibility while providing corresponding service certainty and reliability under the agreed rule of on-line operation.
The application relates to a unified network integrated transmission requirement for multiple services in an airborne system, provides different quality of service (QoS) capability integrated services for different interface access service characteristics, effectively controls timeliness of service access of each interface, satisfies control and buffering capability, and realizes a deterministic table tennis transmission method in an online centralized resource planning control mode for differentiated service scenes based on distributed synchronous coordination and time-sharing gate control scheduling communication under a dynamic flexibility and high deterministic communication architecture.
The invention discloses a deterministic ping-pong transmission method under an online centralized resource planning control mode, which is oriented to a time-sensitive deterministic Ethernet transmission system of a differentiated service scene and defines an online centralized network resource planning control design mode and a deterministic ping-pong communication transmission global plan provided by a network resource planning controller. The ping-pong communication transmission global planning is a dynamic variable ping-pong resource planning provided for system service flows, and is carried out on the basis of high-precision network clock synchronization constructed by the system, so that a ping-pong gating list for service scheduling is constructed, a deterministic scheduling transmission mechanism of a deterministic network system is realized, the time-aware scheduling TAS data flow in a ping-pong queue can be transmitted in a network in a contention-free manner, the transmission of a bearing bandwidth reservation type service is realized by reserving a bandwidth in the ping-pong gating time slot, and the integration of a bandwidth reservation type data flow and a TAS type data flow on the same physical link is realized. As shown in fig. 1, the time-sensitive deterministic ethernet transmission system is composed of a network resource planning controller, a communication node device, a communication link and a communication bridge. The network resource planning controller is in communication connection with the communication node equipment and the communication bridges, and the bridges and the communication node equipment are connected through communication links. The communication node device includes an originating terminal and a destination terminal, i.e., end stations on the left and right sides in fig. 1. The time-sensitive deterministic Ethernet transmission system works in a unified planning scheduling mode based on a resource planning controller, and the parameter information of ping-pong control is derived from planning allocation of the resource planning controller. And the ping-pong communication transmission running state of each device in the time-sensitive deterministic Ethernet transmission system carries out autonomous working running according to the global planning of the resource planning controller.
Step 1, in the online centralized resource planning control mode, the resource planning controller deploys and operates on a constructed time-sensitive deterministic Ethernet transmission system, and global communication information is collected through access network system communication:
step 1.1, a resource planning controller is deployed in an independent hardware mode and is accessed to system communication, the online running centralized network resource planning controller can BE defined in a time sensitive deterministic Ethernet transmission system in a physical entity device mode, the online running centralized network resource planning controller is accessed to the time sensitive deterministic Ethernet transmission system through the physical entity device, and global communication information is collected in a self-learning route based on best effort BE service and in a communication mode supporting plug and play; and/or
Step 1.2, the resource planning controller is deployed in a software component mode and is connected with system communication, the online running centralized network resource planning controller can be used as a software component to run on communication node equipment or a communication network bridge, and global communication information is collected by the communication node equipment or the communication network bridge;
the global communication information comprises a core resource view, and mainly comprises topology, flow characteristics and equipment resources; the topology information mainly describes all nodes, including communication network bridges, terminals and connection relations among the nodes, and supports topology information management; the topology information is managed, so that periodic monitoring of the link state and detection of new nodes can be realized; the flow characteristics refer to key information of time-sensitive flow, bandwidth reservation flow and best-effort forwarding flow scheduling for ping-pong queue scheduling transmission, and the flow characteristics comprise source nodes, destination nodes and performance requirements; the device resources include configurable resources and allocated resources contained by the device in the time-sensitive deterministic ethernet transport system.
Step 2, the resource planning controller plans deterministic ping-pong queue communication configuration step by step according to service source equipment (data or service starting end, left end station in fig. 1) and a relay network bridge based on the core resource view of the collected information.
Step 2.1, a first step of global configuration planning is performed, and planning is performed for service source equipment. Describing global information collected on a communication node serving as a service source end by adopting a hierarchical communication resource set, wherein elements forming the communication resource set respectively correspond to application service throughput, service key characteristics, service period and time delay characteristics of the communication node, respective bandwidth capacity of differentiated input service, respective bandwidth capacity of differentiated output service, overall bandwidth capacity of the communication node and service transmission redundancy characteristics; distributing the service to a corresponding ping-pong gating queue or pong gating queue through abstracting different service critical characteristics and bandwidths, wherein a TAS service is placed at a gating starting position of the ping-pong queue and the bandwidths are met, and meanwhile, the opening duration of the gating list meets the bandwidth constrained to the data bearing bandwidth of the ping-pong queue; the TAS service is placed at the gate start position of the pong queue, the bandwidth is met, and meanwhile, the opening duration of the gate list meets the constraint of the bandwidth of the pong queue for carrying data;
step 2.2, dividing the service set of the service source equipment by adopting a coarse granularity layering mode, dividing the service set of the source equipment into three service subsets with different service class characteristics according to the communication resource set of the service source equipment, wherein the three service subsets comprise a time sensitive high-determination service subset, a bandwidth reserved service subset and a best effort transmission service subset, and carrying out duty ratio statistics on bandwidths of different subsets at ports of the service source equipment to preliminarily divide a ping-pong gating period and gating switch control points; based on the coarse granularity division subset, carrying out priority division on the fine granularity business of the second level; the fine particles are further refined only for subsets of the same type of services, decisions are made based on coarse and fine granularity division, application scene subdivision levels corresponding to the services and weights of the services, and scheduling rights of the services of the subsets in each gating are determined.
And 2.3, performing global configuration planning in a second step, and planning for the network bridge equipment.
The global information collected by the bridge is described by adopting a hierarchical communication resource set, and the elements forming the bridge communication resource set respectively correspond to the transmission path of the local bridge service, the respective bandwidth capacity of the differentiated input service, the respective bandwidth capacity of the differentiated output service and the overall bandwidth capacity of each port of the bridge.
Performing linkage distribution based on the collected global information of the network bridge equipment and the planning state of the upper-level equipment; the collected global information of the bridge equipment comprises the capabilities of a bridge service transmission path, respective bandwidth capacity of differentiated input service, respective bandwidth capacity of differentiated output service, overall bandwidth capacity of each port of the bridge and the like; the upper level equipment comprises service source equipment and upper level network bridge equipment; the linkage distribution means: 1) The equipment receives a ping queue gating list corresponding to a previous-stage adjacent continuous pong queue gating list, wherein the corresponding relation is that gating IDs are consistent, and switching time points under global synchronization are set consistently; 2) The equipment receives a pong queue gating list corresponding to a previous-stage adjacent continuous ping queue gating list, wherein the corresponding relation is that gating IDs are consistent, and switching time points under global synchronization are set consistently; the ping-pong scheduling docking with the previous-stage equipment is realized through the ping-pong gating configuration;
and 3, carrying out system-level optimization iteration based on the step-by-step planning of the source equipment and the network bridge equipment, and finally obtaining deterministic ping-pong queue communication unified planning by combining the step 2, wherein the optimization iteration principle is used for planning the bandwidth of the TAS service and the reservation guarantee of the transmission path preferentially, and the reservation guarantee of the transmission path comprises the redundant path of the redundant TAS service. And searching paths among nodes and distributing bandwidth resources based on a relative balanced combination mechanism of the total transmission path of the TAS service and the TAS transmission bandwidth of each port. The optimal deployment of links is guided by the monotonic decrease of the fitness function by the element combination of the transmission path length of the TAS traffic flow between nodes and the bandwidth consumption balance of each port of the traffic flow.
And 4, splitting configuration files of each source end device, each relay gateway device and each destination receiving device in a step-by-step planning process by the resource planning controller according to unified planning configuration of the ping-pong queue communication generated by the system, independently storing the configuration files in a database file system managed by the resource planning controller, and distributing the corresponding configuration file communication to each device of the time-sensitive deterministic Ethernet transmission system by the resource planning controller, wherein the communication distribution is realized based on a communication channel and an addressing mode of the controller for collecting global information from each device.
And 5, on the basis of the configuration file distributed by the network resource planning controller, the source device and the relay network bridge respectively arrange scheduling management of a scheduling queue of a time-aware service for the ping queue and the pong queue according to rules defined by the configuration file, wherein the established rules do not exclude scheduling management of a sharing mode by designing scheduling queues of a plurality of time-aware services in a single queue of the ping or pong, and the user can pre-divide priorities of the plurality of time-aware services in a custom mode in the mode and realize the sharing time slot scheduling of the scheduling queues according to a priority mode or finish the sharing time slot scheduling of the scheduling queues of the plurality of time-aware services by adopting other mechanisms.
Step 6, the network bridge completes the time slot gating management of the ping-pong scheduling queue of the equipment end according to the configuration file; the time slot gating management of the ping-pong queue schedule queue is based on a global schedule time reference of a time-sensitive deterministic Ethernet transmission system, and the global schedule time reference is based on a first echelon to construct a global time base value currently synchronized by synchronized equipment (the first echelon equipment refers to first batch of equipment which is powered on first and forms a synchronization set); the network resource controller rapidly decides to define a global scheduling time reference according to the synchronous global time base value constructed by the first echelon equipment and distributes the global scheduling time reference to the terminal and the network bridge equipment.
Step 7, when the ping-pong queues of the source equipment and the relay network bridge are actually executed, adopting switch control based on a gating list to carry out communication scheduling, wherein the scheduling starts from a global scheduling time reference, the whole synchronous time axis is divided into equal-length time slots, continuous numbering of the time slots is carried out from zero, and the numbers take values of 0, 1, 2, 3, … i, i+1 …, j, j+1 and … in sequence;
step 7.1, according to steps 5 and 7, the gating list of the source device and the relay network bridge consists of two time slot elements with adjacent numbers being parity values, the two time slot elements respectively correspond to scheduling time slots of the ping-pong queue, the scheduling period of the source device and the scheduling period of each port of the network bridge are the sum value of two time slot times of the gating list, and the switching boundary of the two gating time slots of the ping-pong queue reserves protection bandwidth; the length of the equal-length time slots of the ping-pong gate meets the service transmission delay requirement, the service load capacity of the ping-pong queue and the service refresh period; and editing the mapping rule of the gating list according to the parity characteristic of the number value, and distributing the edited gating list to terminals and network bridge equipment in the system.
The gating list mapping rule of the terminal is as follows:
first mode
The method comprises the steps that odd time slots of a number value are allocated to ping queue sending and pong queue receiving of a terminal, even time slots of the number value are allocated to pong queue sending and ping queue receiving of the terminal, namely a gating list points to the time slots of the odd number, gating of the ping queue is opened, and data stored in the queue are subjected to data classification scheduling sending according to a system convention rule; the gating list points to even numbered time slots, gating of the pong queue is opened, and data stored in the queue are subjected to data classification scheduling and sending according to a system appointment scheduling rule; the system appointment scheduling rule is a priority scheduling rule: time-aware TAS service > flow control CBS service > best effort BE service, wherein there is no priority difference in TAS service, and there is a priority difference in CBS service and BE service, and the priority determines the scheduling order of the service carried and transmitted in the ping-pong queue: the time-aware TAS service precedes the traffic-controlled CBS service and the best effort BE service, the high priority inside the CBS precedes the low priority, and the high priority inside the BE service precedes the low priority.
Second mode
Even time slots of the number value are allocated to the pong queue of the terminal for transmission and the ping queue for receiving, the even time slots of the number value are allocated to the ping queue of the terminal for transmission and the ping queue for receiving, namely, a gating list points to the even time slots, gating of the pong queue is opened, and data stored in the queue are subjected to data classification scheduling transmission according to a system convention rule; the gating list points to even numbered time slots, gating of the pong queue is opened, and data stored in the queue are subjected to data classification scheduling and sending according to a system appointment scheduling rule; the system contract scheduling rules are as described in one method.
The network resource planning controller plans out the mapping rule of the network bridge gating list in the following two opposite selection modes:
first mode
The gating list mapping rule of the network bridge is defined by the gating list mapping rule of the cooperative terminal. The synergy is defined as follows: when the gating list mapping rule of the terminal is a first mode, odd time slots of the number value are allocated to the ping queue receiving and pong queue sending of the network bridge, even time slots of the number value are allocated to the pong queue receiving and the ping queue sending of the network bridge, namely the gating list of the network bridge transmission port points to the time slots of the odd number, the gating of the pong queue is opened, and data stored in the queue are subjected to data classification scheduling sending according to the system convention rule; the gating list points to even numbered time slots, the gating of the ping queue is opened, and the data stored in the queue is subjected to data classification scheduling and sending according to a system contract scheduling rule.
Second mode
When the gating list mapping rule of the terminal is the second mode, odd time slots of the number value are distributed to the pong queue receiving and ping queue sending of the network bridge, even time slots of the number value are distributed to the ping queue receiving and ping queue sending of the network bridge, namely the gating list of the network bridge transmission port points to the time slots of the odd number, the gating of the ping queue is opened, and data stored in the queue are subjected to data classification scheduling sending according to the system convention rule; the gating list points to even numbered time slots, gating of the pong queue is opened, and data stored in the queue are subjected to data classification scheduling and sending according to a system appointment scheduling rule; the system agreed upon scheduling rules are described in one approach to terminal gating list mapping rules.
In the ping-pong queue scheduling mode, the terminal device and the bridge device identify parity time slots and time slot segmentation boundaries on a global time base constructed on the basis of a unified synchronization function of the system. The time slot identification refers to timing time of different time periods of all communication equipment of the system, and is simultaneously in an odd time slot or an even time slot based on global time base timing, and the identification time slot segmentation boundary refers to that all the equipment simultaneously completes switching of odd and even time slots according to cooperative beats.
One or more pairs of corresponding ping-pong queues can be designed in the network system, the boundaries of the pairs are 4 pairs, the 4 pairs of ping-pong queues form 8 independent scheduling queues, and the 8 independent scheduling queues can be mapped to 8-level priority queues of the universal Ethernet; the queue management of any pair of the ping-pong queues is scheduled according to the Shan Duimo mode, the scheduling periods of the plurality of pairs of ping-pong queue time slots are the same or different, the scheduling period of the plurality of pairs of ping-pong queue time slots constructs the global scheduling period of the ping-pong queue, and the construction mode is that the global scheduling period of the system is the least common multiple of the scheduling periods of the plurality of pairs of ping-pong queue time slots; when a table tennis queue is used for a single pair, the two parameters are consistent in size.
The TT service carried by the system is too closed, and the space for flexible design is lost, so that the system integration and iterative maintenance under the airborne environment with various working modes are not facilitated. The deterministic ping-pong transmission method under the online centralized resource planning control mode provided by the invention is oriented to the design and application requirements of network architecture in a future intelligent airborne system, has certain certainty and reliability for data collection, processing and exchange of intelligent avionics under a communication architecture scene of hierarchical multi-service integration, and also has certain openness and flexibility, and communication resource reconstruction and migration planning are oriented to the system requirements and the working modes with multiple ends of continuous iteration update.
The time-sensitive deterministic Ethernet transmission resource planning controller is an indispensable component in the network architecture, is embedded into each avionic communication subsystem, provides global resource allocation and communication logic relation planning mapping for connection between each communication subsystem and a network system switch, realizes the resource requirement and transmission service characteristics of guaranteeing different time-critical data transmission under reliable configuration planning among network devices, effectively advances the development of the time-sensitive deterministic Ethernet, provides better guarantee on the network transmission safety and the data service certainty, and greatly enriches the methods of network type selection and other links in application occasions such as an airborne task system, a high-speed rail control system, industrial field control and the like with high safety requirements; meanwhile, the application of the invention is independent of a hardware platform, has wide application range and has obvious market prospect and economic benefit.
It will be understood that equivalents and modifications will occur to those skilled in the art in light of the present invention and their spirit, and all such modifications and substitutions are intended to be included within the scope of the present invention as defined in the following claims.
Claims (6)
1. A deterministic ping-pong transmission method in an online centralized resource planning control mode, the method being performed based on an ethernet transmission system, the ethernet transmission system comprising a network resource planning controller, a communication node device, a communication link and a communication bridge, wherein the network resource planning controller is in communication connection with the communication node device and the communication bridge, and each bridge are connected with the communication node device through the communication link, the method comprising:
the network resource planning controller collects global communication information, wherein the global communication information comprises a core resource view;
the network resource planning controller plans deterministic ping-pong queue communication configuration step by step according to service source equipment and a relay network bridge based on the core resource view;
the network resource planning controller performs optimization iteration of a system level based on ping-pong queue communication configuration of step-by-step planning certainty, and finally obtains a deterministic ping-pong queue communication unified plan;
the network resource planning controller splits deterministic ping-pong queue communication unified planning into configuration files of each source communication node device, each relay network bridge device and each destination communication node device which are planned step by step, and distributes corresponding configuration file communication to each device of the time-sensitive deterministic Ethernet transmission system;
the source end communication node equipment and the relay network bridge equipment respectively arrange scheduling management of a scheduling queue of a time-aware service for the ping queue and the pong queue according to rules defined by configuration files;
the network resource controller rapidly decides to define a global scheduling time reference according to a synchronous global time base value constructed by first echelon equipment and distributes the global scheduling time reference to terminal node equipment and network bridge equipment, wherein the first echelon equipment refers to equipment which is electrified firstly and forms a synchronous set;
the network bridge carries out time slot gating management of the ping-pong scheduling queue of the equipment end according to the configuration file and the global scheduling time reference of the time sensitive deterministic Ethernet transmission system;
the terminal node equipment and the network bridge equipment edit a gating list according to the global scheduling time reference, specifically: performing gating list mapping rule editing according to parity characteristic of time slot number values, wherein the gating list of the source terminal equipment and the relay network bridge consists of two time slot elements with adjacent number of parity values,
the gating list mapping rule of the terminal comprises: a first mode: odd time slots of the number value are allocated to ping queue sending and pong queue receiving of the terminal, and even time slots of the number value are allocated to pong queue sending and ping queue receiving of the terminal; or a second mode: even time slots of the number value are allocated to the pong queue transmission and the ping queue reception of the terminal, and even time slots of the number value are allocated to the ping queue transmission and the pong queue reception of the terminal;
the gating list mapping rule of the bridge includes: the gating list mapping rule of the bridge is defined by cooperating with the gating list mapping rule of the terminal, when the gating list mapping rule of the terminal is in a first mode, odd time slots of the number value are distributed to the ping-pong queue receiving and the pong queue sending of the bridge, and even time slots of the number value are distributed to the pong queue receiving and the ping-pong queue sending of the bridge; when the gating list mapping rule of the terminal is the second mode, odd time slots of the number value are allocated to pong queue receiving and ping queue sending of the bridge, and even time slots of the number value are allocated to ping queue receiving and ping queue sending of the bridge
The source node equipment and the relay network bridge perform ping-pong queue operation by adopting switch control based on a gating list to perform communication scheduling according to scheduling management of scheduling queues of time-aware services.
2. The method according to claim 1, characterized in that collecting global communication information, in particular comprises:
the method comprises the steps of deploying and accessing an Ethernet transmission system for communication in an independent hardware mode, and collecting global communication information in a self-learning route based on best effort BE service and a communication mode supporting plug and play; or alternatively
The communication is deployed in the form of software components and is connected to the Ethernet transmission system for communication, and global communication information is collected by means of communication node equipment or communication network bridging connection network.
3. The method according to claim 1, wherein the deterministic ping-pong queue communication configuration is planned step by service source equipment, relay bridges based on the core resource view, specifically comprising:
planning service source equipment: the method comprises the steps that a hierarchical first communication resource set is adopted to describe global information collected on a communication node serving as a service source end, elements of the first communication resource set comprise application service throughput, service key characteristics, service period and time delay characteristics of the communication node, respective bandwidth capacity of differentiated input service, respective bandwidth capacity of differentiated output service, overall bandwidth capacity of the communication node and service transmission redundancy characteristics, and the service is distributed to a corresponding ping-pong gating queue or pong gating queue through the first communication resource set;
based on coarse granularity, dividing a service set of the source terminal device into: the method comprises the steps of performing duty ratio statistics on bandwidths of different service subsets at a source equipment port to preliminarily divide ping-pong gating periods and gating switch control points, and dividing service priorities based on fine granularity;
planning the network bridge equipment: describing global information collected by the network bridge by adopting a layered second communication resource set, wherein elements of the second communication resource set respectively correspond to a local network bridge service transmission path, respective bandwidth capacities of differentiated input services, respective bandwidth capacities of differentiated output services and overall bandwidth capacities of all ports of the network bridge;
and carrying out linkage distribution based on global information collected by the network bridge equipment and the planning state of the upper-level equipment.
4. The method of claim 1, wherein the communication distribution is implemented based on a communication channel and addressing mode in which a network resource controller gathers global information from devices.
5. The method according to claim 1, wherein the source node device and the relay network bridge perform ping-pong queue operation by performing communication scheduling according to the scheduling management of the scheduling queue of the time-aware service by using switch control based on a gating list, specifically:
dividing the whole synchronous time axis into equal-length time slots from a global scheduling time reference, and sequentially numbering the time slots from zero, wherein the numbers are 0, 1, 2, 3, … i, i+1 …, j, j+1 and … in sequence; and scheduling according to the equal-length time slots.
6. The method of claim 1, wherein the source device scheduling period and the bridge port scheduling period are the sum of two slot times of the gating list.
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