CN110971543A - Transmission scheduling method and system for TTFC network - Google Patents

Transmission scheduling method and system for TTFC network Download PDF

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CN110971543A
CN110971543A CN201911213533.7A CN201911213533A CN110971543A CN 110971543 A CN110971543 A CN 110971543A CN 201911213533 A CN201911213533 A CN 201911213533A CN 110971543 A CN110971543 A CN 110971543A
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sending
request
messages
transmission
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CN110971543B (en
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解军
王琳
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Chengdu Uestc Optical Communication Co ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/50—Queue scheduling
    • H04L47/62—Queue scheduling characterised by scheduling criteria
    • H04L47/6215—Individual queue per QOS, rate or priority
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/06—Synchronising arrangements
    • H04J3/0635—Clock or time synchronisation in a network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/16—Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
    • H04J3/1605—Fixed allocated frame structures
    • H04J3/1652—Optical Transport Network [OTN]
    • H04J3/1664—Optical Transport Network [OTN] carrying hybrid payloads, e.g. different types of packets or carrying frames and packets in the paylaod
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/50—Queue scheduling
    • H04L47/62—Queue scheduling characterised by scheduling criteria
    • H04L47/622—Queue service order
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J2203/00—Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
    • H04J2203/0001—Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH
    • H04J2203/0098—Traffic aspects, e.g. arbitration, load balancing, smoothing, buffer management

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
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Abstract

The invention provides a method and a system for sending and scheduling a TTFC network, which are used for sending and scheduling VL messages, wherein the types of the VL messages comprise TT-VL messages, RC-VL messages and BE-VL messages, and the method comprises the following processes: step 1: configuring a sending request parameter and designing a sending cache region according to the type of the VL message, wherein the sending cache region stores the VL message of a corresponding type; step 2: each VL message initiates a sending request according to the sending request parameter; and step 3: responding to the sending request according to the type of the VL message and the response condition to finish sending scheduling; the response priority of the VL message is TT-VL, RC-VL and BE-VL from high to low; a transmission request of a low priority message is not responded to while responding to a transmission request of a high priority message. The invention integrates multiple aspects of sending cache design, cache data sequencing storage and sending scheduling process, realizes the sending scheduling of three service messages of TTFC, and particularly meets the requirements of low time delay and high timing precision of TT-VL messages.

Description

Transmission scheduling method and system for TTFC network
Technical Field
The present invention relates to the field of communication message scheduling, and in particular, to a method and a system for scheduling transmission of a TTFC network.
Background
Along with the increasing degree of integration of modern avionics systems, avionics bus networks are also continuously developed. At present, a Fibre Channel bus (FC) has become a mainstream avionics bus network of a current military aircraft by virtue of its characteristics of high efficiency, high reliability, strong real-time property, suitability for equipment bottom layer communication and the like. The FC bus carries out message communication based on an event triggering mode, and when the network load is large, the message communication has strong uncertainty.
In order to further improve the certainty of network message communication and guarantee the strong real-Time performance of the network, the avionic bus network starts to introduce a Time-Triggered mechanism, and a Time-Triggered Ethernet (TTE) is typical. By introducing a Time trigger mechanism into an FC bus, the method combines the advantages of the Time trigger mechanism and an FC protocol to transmit real-Time and non-real-Time services, namely a Time-Triggered Fibre Channel (TTFC), and is a new development direction of an avionic bus network.
Similar to TTE, TTFC carries out message communication based on VL, supports TT-VL, RC-VL and BE-VL three service types, and supports PCF-based clock synchronization. Each VL channel uniquely defines a logical path and the message transmission priority of that path. How to send and schedule VL messages of different services ensures that abnormal conflict does not occur in the scheduling process of PCF, TT-VL, RC-VL and BE-VL, can meet the time delay requirement required by the service type of the PCF, TT-VL, RC-VL and BE-VL, improves the timing precision of message communication, and is a key problem influencing the performance of the whole TTFC network.
Disclosure of Invention
The number of VLs transmitted on each terminal in the TTFC network is usually defined to BE dozens or even hundreds, three service types of TT-VL, RC-VL and BE-VL are supported in the TTFC network, clock synchronization based on PCF is supported, and different communication services have different requirements on network delay, jitter and certainty when being transmitted. Aiming at the existing problems, the invention provides a TTFC transmission scheduling method, which realizes the scheduling of TT-VL, RC-VL and BE-VL data frames and enables various data frames to BE transmitted according to the requirements of timing precision, time delay, speed and the like required by a system network.
The technical scheme adopted by the invention is as follows: a transmission scheduling method of a TTFC network schedules the transmission of VL messages, wherein the types of the VL messages comprise TT-VL messages, RC-VL messages and BE-VL messages, and the method comprises the following processes:
step 1: configuring a sending request parameter and designing a sending cache region according to the type of the VL message, wherein the sending cache region stores the VL message of a corresponding type;
step 2: each VL message sends a request to the initiator according to the request sending parameters;
and step 3: responding to the sending request according to the type of the VL message and the response condition to finish sending scheduling;
the response priority of the VL message is TT-VL, RC-VL and BE-VL from high to low; a transmission request of a low priority message is not responded to while responding to a transmission request of a high priority message.
Further, the parameters of the TT-VL message include a serial number, an initial integration period, a transmission period, an intra-period offset, a maximum frame length, and a remaining integration period, where the remaining integration period is calculated from the initial integration period, the transmission period, and the current integration period and represents a remaining integration period from the initiation of the transmission request; the RC-VL parameters comprise a sequence number, a minimum bandwidth gap and a maximum frame length, wherein the minimum bandwidth gap refers to a time interval for initiating a sending request between each RC-VL message; the BE-VL message parameter comprises a maximum frame length.
Further, in step 1, a specific method for designing a sending buffer area is as follows: the method comprises the steps that a sending cache region is designed into a TT/RC sending cache region and a BE sending cache region, wherein the TT/RC sending cache region comprises a TT message storage region and an RC message storage region and is used for storing TT-VL and RC-VL messages, and the BE sending cache region stores BE-VL messages;
the TT/RC sending buffer area is based on the RAM block and is designed in a ping-pong switching double-buffer mode;
the BE sending buffer area is designed as a circular queue.
Further, a specific method for storing the VL message to the sending buffer includes:
TT-VL messages are sorted from small to large according to the self periodic offset parameter, and are sequentially stored into a TT message storage area in a TT/RC sending cache area from low to high according to address bits;
the RC-VL message is randomly stored into an RC-VL message storage area in the TT/RC sending cache area; each TT-VL message and each RC-VL message have a sequence number, once the messages are stored in a cache, the sequence number of each message corresponds to one cache address, and when the messages with the sequence numbers are received next time, the messages are directly stored in the corresponding cache addresses;
the BE-VL messages are sequentially stored into a circular queue according to the receiving time;
further, the specific process of the TT-VL message initiating the transmission request according to the transmission request parameter is as follows: and starting clock synchronization in the current integration period, calculating the remaining integration period of each TT-VL message, wherein the remaining integration period is 0, which indicates that the current integration period needs to initiate a sending request, the TT-VL messages needing to initiate the sending request sequentially initiate the sending request according to the offset in the period, and the synchronous completion of the current integration period indicates that the TT-VL message sending request required to be sent in the current integration period is generated and completed.
Further, the specific process that the RC-VL message initiates the sending request according to the sending request parameter is that the RC-VL message judges whether to initiate the sending request according to the remaining time, and initiates the sending request when the remaining time is 0; the residual time is the residual time for initiating the sending request and is obtained according to the minimum bandwidth gap of the RC-VL message; the transmission time interval between two RC-VL messages is not less than the minimum bandwidth gap.
Further, the BE-VL message transmission request continues to BE generated as long as the BE transmission buffer is not empty.
Further, the specific method for responding to the TT-VL message sending request in step 3 is as follows: in the current integration period, whether TT-VL messages correspondingly stored in the address bit of the cache region initiate a sending request is sequentially inquired from low to high, if the sending request exists, the request is responded, and the corresponding TT-VL messages are sent; and if the sending request does not exist, inquiring the TT-VL message with the next address as the stored TT-VL message until inquiring the TT-VL messages stored in all the addresses of the TT-VL message storage area of the cache area, and finishing the sending of the TT-VL message of the current integration period.
Further, the condition for responding to the RC-VL message sending request is: (1) no TT-VL message is currently being sent; (2) the end time from the response to the completion of the transmission of the RC-VL message is earlier than the transmission start time of the next TT-VL message.
Further, the conditions for responding to the BE-VL message sending request are as follows: (1) no TT-VL message or RC-VL message is currently sent; (2) no RC-VL message sending request currently; (3) the BE-VL message is earlier than the transmission start time of the next TT-VL message from the response to the completion of transmission.
The invention also provides a sending scheduling system based on the sending scheduling method of the TTFC network, which comprises a cache management module, a sending scheduling module, a PCIe interface module and an FC interface module, wherein the cache management module, the sending scheduling module, the PCIe interface module and the FC interface module are connected in series
The cache management module comprises a TT/RC cache region and a BE cache region which are respectively used for storing TT-VL, RC-VL and BE-VL messages;
the sending and scheduling module comprises a request module, a request arbitration module and a scheduling module;
the request module comprises a VL message configuration table, a TT-VL message request module, an RC-VL message request module and a BE-VL message request module, wherein the configuration table is used for configuring detailed parameters of all messages, and each request module initiates a sending request according to the type and the detailed parameters of all VL messages;
the request arbitration module judges whether to respond to the sending request according to the response condition of the VL message and outputs an arbitration result;
the scheduling module sends corresponding information in the cache management module according to the arbitration result of the request arbitration module;
the PCIe interface module is used for receiving VL messages; the FC interface module is used for sending VL messages.
Compared with the prior art, the beneficial effects of adopting the technical scheme are as follows: the invention integrates multiple aspects of sending cache design, cache data sequencing storage and sending scheduling process, realizes the sending scheduling of three service messages of TTFC, and particularly meets the requirements of low time delay and high timing precision of TT-VL messages.
Drawings
Fig. 1 is a flowchart of TT-VL message transmission scheduling in the present invention.
FIG. 2 is a schematic diagram of the TT/RC transmit buffer of the present invention.
FIG. 3 is a diagram of a BE send buffer in the present invention.
Fig. 4 is a schematic block diagram of a transmission scheduling system provided in the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
The invention realizes the scheduling of TT-VL, RC-VL and BE-VL data frames by designing a TTFC sending scheduling method, so that various data frames can BE sent according to the requirements of timing precision, time delay, speed and the like required by a system network, each VL is provided with a uniquely determined source end and a uniquely determined destination end, and each VL message is provided with a uniquely determined service type; different types of VL have priority differences, and the priority is divided into TT-VL, RC-VL and BE-VL from high to low; the total number of the supported VLs of the network system is N; the method comprises the following specific steps:
step 1: configuring a sending request parameter and designing a sending cache region according to the type of the VL message, wherein the sending cache region stores the VL message of a corresponding type;
step 2: each VL message sends a request to the initiator according to the request sending parameters;
and step 3: responding to the sending request according to the type of the VL message and the response condition to finish sending scheduling;
the concrete implementation of the step 1 is as follows:
first, parameters are configured for VL message types, wherein,
the parameters of each TT-VL message include a sequence number, an initial integration period Tps (32b), a transmission period Tti (taking an integration period as a unit), a intra-period offset (Toffset, taking the number of clocks in a logic design as a unit, taking a 2.125Gbps line speed as an example, each clock is 18.8ns), and a maximum frame length (TLmax, a value range of [68, 2148] bytes);
the parameters of each RC-VL message comprise a sequence number, a minimum bandwidth gap (RBmin, with a value range of [0.1ms, 128ms ]), and a maximum frame length (RLmax, with a value range of [68, 2148] bytes);
the parameters of each BE-VL message include the maximum frame length (BLmax, which ranges from [68, 2148] bytes).
Secondly, designing a sending buffer area according to the type of the VL message, as shown in fig. 2 and 3, the sending buffer area is divided into a TT/RC buffer area and a BE sending buffer area; the TT/RC cache region comprises a TT message storage region and an RC message storage region and is used for storing TT-VL messages and RC-VL messages, and the BE sending cache region is used for storing BE-VL messages.
For a TT/RC cache region, the cache region is designed in a RAM block mode, the total number of VL messages supported by a system network is N, if all services are TT-VL and RC-VL, the TT/RC sending cache region needs to occupy 2N Lm storage space, the address range of the cache is 0-2N-1, and Lm is the maximum storage space required by each VL message data frame.
Meanwhile, the TT/RC cache region is also designed in a ping-pong switching mode, so that the simultaneous read-write operation of a single storage space is ensured. As shown in FIG. 1, assuming that the address bit width of TT/RC sending buffer is i, the lowest bit (Taddr [0]) of the buffer address (Taddr) is used to identify the position of the currently available ping-pong buffer, and the other bits (Taddr [ i-1,1]) of the buffer address are used to identify the sorting position of the buffer in the buffer queue.
The storage space with the address bits of 0-J, namely the TT message storage area, stores TT-VL messages, and the storage space with the address bits of J-J + K-1, namely the RC-VL message storage area, stores RC-VL messages.
The BE cache region designs a bit circular queue.
And finally, storing the VL messages into corresponding sending buffer areas according to the types and the parameters of the VL messages.
The TT-VL messages are sorted according to the offset in the period, the offset is stored into a TT storage area in the TT/RC cache area in sequence from small to large, the TT-VL messages are stored into storage spaces corresponding to the address bits from low to high in sequence during storage, the offset corresponds to the sequence number, and the sequence number corresponds to the sequence number from small to large according to the sorting of the offset.
When the RC-VL message is stored in the cache region for the first time, the RC-VL message is randomly stored in an RC-VL message storage region of the TT/RC cache region, after the RC-VL message is stored, the stored address bit of each message corresponds to the sequence number of the message, and then the RC-VL message receiving the sequence number is directly stored in the storage space corresponding to the address bit corresponding to the sequence number.
BE-VL messages are sequentially stored in a circular queue according to the receiving time.
Step 2 comprises a concrete method for initiating a sending request by TT-VL information, RC-VL information and BE-VL information, wherein:
as shown in fig. 1, the specific method for the TT-VL message to initiate the transmission request is as follows:
the TT-VL message initiates a sending request based on the integration period; and starting clock synchronization in the current integration period, calculating the remaining integration period of each TT-VL message, wherein the remaining integration period is 0, which indicates that the current integration period needs to initiate a sending request, the TT-VL messages needing to initiate the sending request sequentially initiate the sending request according to the offset in the period, and the synchronous completion of the current integration period indicates that the TT-VL message sending request required to be sent in the current integration period is generated and completed.
The specific method for initiating the sending request by the RC-VL message comprises the following steps:
the sending request of the RC-VL message does not depend on an integration period, the RC-VL sends at most one frame according to the minimum bandwidth gap of the RC-VL message as the basis for initiating the request, in the time interval of each minimum bandwidth gap, the minimum bandwidth gap is set to be 0.1 x k (ms) (k is an integer from 1 to 1280), the minimum bandwidth gap starts from 0.1ms, the minimum bandwidth gap ends from 128ms, and the step size is 0.1 ms. And the RC-VL judges whether to initiate a sending request according to the value of the residual time, wherein the residual time is maintained by each RC-VL, the residual time is calculated by the minimum bandwidth gap, the minimum bandwidth gap is decreased by 0.1ms, and when the residual time is 0, the RC-VL initiates the sending request.
The specific method for initiating the sending request by the BE-VL message comprises the following steps: as long as the BE sending buffer queue is not empty, a sending request of the BE-VL message is always generated.
Step 3 comprises response methods of three message sending requests of TT-VL message, RC-VL message and BE-VL message, wherein the response methods comprise
As shown in fig. 1, the method for responding to the TT-VL message transmission request is as follows:
in the current integration period, whether VL-VL messages stored correspondingly to the address bits of the cache region initiate a sending request is sequentially inquired from low to high, if the sending request exists, the request is responded, and the corresponding VL-VL messages are sent; and if the sending request does not exist, inquiring the TT-VL message stored in the next address bit until inquiring the TT-VL messages stored in all the addresses of the TT-VL message storage area of the cache area, and finishing the sending of the TT-VL message of the current integration period after responding to the TT-VL message of the sending request initiated by all the current integration period.
The method for responding the RC-VL message sending request comprises the following steps: the sending request response condition of the RC-VL message is as follows:
(1) no TT-VL message is currently being sent;
(2) the end time from the response to the completion of the transmission of the RC-VL message is earlier than the transmission start time of the next TT-VL message.
If a plurality of RC-VL messages initiate the sending request, corresponding is carried out according to the initiating time of the sending request, and the sending request initiated first is responded first.
The method for responding the BE-VL message sending request comprises the following steps: the sending request response condition of the BE-VL message is as follows:
(1) no TT-VL message or RC-VL message is currently sent;
(2) no RC-VL message sending request currently;
(3) the BE-VL message is earlier than the transmission start time of the next TT-VL message from the response to the completion of transmission.
The BE-VL message transmission request is responded only if the above-mentioned 3 conditions are satisfied simultaneously.
Because the TT/RC sending buffer needs to be scheduled in real time in a hardware manner, all messages to be sent need to be stored on the TTFC node card.
The BE send buffer is a circular queue, which may BE based on DDR memory, as one embodiment. As another example, the queue may also be implemented by an internal BLOKRAM of the FPGA.
The TT/RC sending buffer area is used for storing TT-VL messages and RC-VL messages, the VL message sequence number is used for storage, and a ping-pong switching double-buffer mode is adopted to ensure that read-write does not conflict.
Because the TT-VL message and the RC-VL message are messages needing periodic scheduling transmission, for the same VL message, when the message arrives for multiple times in two adjacent transmission intervals, the buffer of the message is subjected to covering processing, and only the newly arrived message is transmitted outwards.
The present invention also provides a transmission scheduling system of the TTFC network that has been used in the transmission scheduling method, as shown in fig. 4, including a buffer management module and a transmission scheduling module, where:
the cache management module comprises a TT/RC cache region and a BE cache region which are respectively used for storing TT-VL, RC-VL and BE-VL messages;
the TT/RC sending cache region is realized by a DDR memory, and the BE sending cache region is realized based on the DDR memory or internal BLOKRAM of the FPGA.
The sending and scheduling module comprises a request module, a request arbitration module and a scheduling module; the request module comprises a TT-VL message request module, an RC-VL message request module and a BE-VL message request module.
The request module comprises a configuration table for transmitting VL (variable Link) messages and a specific request module for transmitting three types of VL messages, wherein the configuration table is used for configuring detailed parameters of each message, and the specific request module initiates a transmission request according to the type and the detailed parameters of each VL message;
the request arbitration module judges whether to respond to the sending request according to the response condition of the VL message and outputs an arbitration result;
and the scheduling module sends the corresponding message in the cache management module according to the arbitration result of the request arbitration module.
The invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification and any novel method or process steps or any novel combination of features disclosed. Those skilled in the art to which the invention pertains will appreciate that insubstantial changes or modifications can be made without departing from the spirit of the invention as defined by the appended claims.
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
Any feature disclosed in this specification may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.

Claims (10)

1. A transmission scheduling method of a TTFC network is characterized in that VL messages are subjected to transmission scheduling, the types of the VL messages comprise TT-VL messages, RC-VL messages and BE-VL messages, and the method comprises the following processes:
step 1: configuring a sending request parameter and designing a sending cache region according to the type of the VL message, wherein the sending cache region stores the VL message of a corresponding type;
step 2: each VL message initiates a sending request according to the sending request parameter;
and step 3: responding to the sending request according to the type of the VL message and the response condition to finish sending scheduling;
the response condition of the VL message is as follows: the VL message response priority is TT-VL message, RC-VL message and BE-VL message from high to low; a transmission request of a low priority message is not responded to while responding to a transmission request of a high priority message.
2. The transmission scheduling method of claim 1, wherein the parameters of the TT-VL message include a sequence number, an initial integration period, a transmission period, an intra-period offset, a maximum frame length, and a remaining integration period, and the remaining integration period is calculated from the initial integration period, the transmission period, and a current integration period and represents a remaining integration period from an initiation of the transmission request; the RC-VL parameters comprise a sequence number, a minimum bandwidth gap and a maximum frame length, wherein the minimum bandwidth gap refers to a time interval for initiating a sending request between each RC-VL message; the BE-VL message parameter comprises a maximum frame length.
3. The transmission scheduling method of claim 2, wherein in the step 1, a specific method for designing a transmission buffer is as follows: the method comprises the steps that a sending cache region is designed into a TT/RC sending cache region and a BE sending cache region, wherein the TT/RC sending cache region comprises a TT message storage region and an RC message storage region and is used for storing TT-VL and RC-VL messages; BE sends buffer memory area to store BE-VL message;
the TT/RC sending buffer area is based on the RAM block and is designed in a ping-pong switching double-buffer mode;
the BE sending buffer area is designed as a circular queue.
4. The transmission scheduling method of claim 3, wherein the specific method for storing the VL message in the transmission buffer comprises:
TT-VL messages are sorted from small to large according to the self periodic offset parameter and are sequentially stored from low to high according to address bits
The TT/RC sends a TT message storage area in the cache area;
the RC-VL message is randomly stored into an RC message storage area in the TT/RC sending cache area; each TT-VL message and each RC-VL message have a sequence number, once the messages are stored in a cache, the sequence number of each message corresponds to one cache address, and when the messages with the sequence numbers are received next time, the messages are directly stored in the corresponding cache addresses;
BE-VL messages are sequentially stored in a circular queue according to the receiving time.
5. The transmission scheduling method of one of claims 2 to 4, wherein the specific process of the TT-VL message initiating the transmission request according to the transmission request parameter is as follows: and starting clock synchronization in the current integration period, calculating the remaining integration period of each TT-VL message, wherein the remaining integration period is 0, which indicates that the current integration period needs to initiate a sending request, the TT-VL messages needing to initiate the sending request sequentially initiate the sending request according to the offset in the period, and the synchronous completion of the current integration period indicates that the TT-VL message sending request required to be sent in the current integration period is generated and completed.
6. The transmission scheduling method of claim 5, wherein the specific process of the RC-VL message initiating the transmission request according to the transmission request parameter is that the RC-VL message judges whether to initiate the transmission request according to the remaining time, and initiates the transmission request when the remaining time is 0; the residual time is the residual time for initiating the sending request and is obtained according to the minimum bandwidth gap of the RC-VL message; the sending time interval between the two RC-VL messages is not less than the minimum bandwidth gap; the BE-VL messaging request continues to BE generated as long as the BE buffer is not empty.
7. The transmission scheduling method of claim 6, wherein the specific method for responding to the TT-VL message transmission request in step 3 is as follows: in the current integration period, whether TT-VL messages correspondingly stored in the address bit of the cache region initiate a sending request is sequentially inquired from low to high, if the sending request exists, the request is responded, and the corresponding TT-VL messages are sent; and if the sending request does not exist, inquiring the TT-VL message with the next address as the stored TT-VL message until inquiring the TT-VL messages stored in all the addresses of the TT-VL message storage area of the cache area, and finishing the sending of the TT-VL message of the current integration period.
8. The transmission scheduling method of claim 7, wherein the condition for responding to the RC-VL message transmission request is: (1) no TT-VL message is currently being sent; (2) the end time from the response to the completion of the transmission of the RC-VL message is earlier than the transmission start time of the next TT-VL message.
9. The transmission scheduling method of claim 8, wherein the condition for responding to the BE-VL message transmission request is: (1) no TT-VL message or RC-VL message is currently sent; (2) no RC-VL message sending request currently; (3) the BE-VL message is earlier than the transmission start time of the next TT-VL message from the response to the completion of transmission.
10. A transmission scheduling system of a TTFC network is characterized by comprising a cache management module, a transmission scheduling module, a PCIe interface module and an FC interface module, wherein:
the cache management module comprises a TT/RC cache region and a BE cache region which are respectively used for storing TT-VL, RC-VL and BE-VL messages;
the sending and scheduling module comprises a request module, a request arbitration module and a scheduling module;
the request module comprises a VL message configuration table, a TT-VL message request module, an RC-VL message request module and a BE-VL message request module, wherein the configuration table is used for configuring detailed parameters of all messages, and each request module initiates a sending request according to the type and the detailed parameters of all VL messages;
the request arbitration module judges whether to respond to the sending request according to the response condition of the VL message and outputs an arbitration result;
the scheduling module sends corresponding information in the cache management module according to the arbitration result of the request arbitration module;
the PCIe interface module is used for receiving VL messages; the FC interface module is used for sending VL messages.
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112214337A (en) * 2020-10-21 2021-01-12 成都成电光信科技股份有限公司 TTFC network transmission cache design method, computer equipment and storage medium
CN113840384A (en) * 2021-11-29 2021-12-24 成都成电光信科技股份有限公司 Variable step length scheduling method for time trigger message in TT-FC network
CN116633808A (en) * 2023-07-19 2023-08-22 成都成电光信科技股份有限公司 Data monitoring system and method under time-triggered fiber channel network

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109600187A (en) * 2018-11-28 2019-04-09 山东航天电子技术研究所 A kind of time trigger Unified Network transmission end system scheduling method and device
CN110035022A (en) * 2019-04-22 2019-07-19 中国航空无线电电子研究所 Based on the AFDX exchange method and interchanger under time trigger framework
CN110048949A (en) * 2019-03-27 2019-07-23 天津大学 Communication means based on the estimation of TTE network capacity

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109600187A (en) * 2018-11-28 2019-04-09 山东航天电子技术研究所 A kind of time trigger Unified Network transmission end system scheduling method and device
CN110048949A (en) * 2019-03-27 2019-07-23 天津大学 Communication means based on the estimation of TTE network capacity
CN110035022A (en) * 2019-04-22 2019-07-19 中国航空无线电电子研究所 Based on the AFDX exchange method and interchanger under time trigger framework

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
ZHONG ZHENG等: "The Research of Scheduling Algorithm for Time-Triggered Ethernet Based on Path-hop", 《2016 IEEE/AIAA 35TH DIGITAL AVIONICS SYSTEMS CONFERENCE》 *
何向栋: "基于时间触发网络的时间同步研究", 《信息通信》 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112214337A (en) * 2020-10-21 2021-01-12 成都成电光信科技股份有限公司 TTFC network transmission cache design method, computer equipment and storage medium
CN113840384A (en) * 2021-11-29 2021-12-24 成都成电光信科技股份有限公司 Variable step length scheduling method for time trigger message in TT-FC network
CN113840384B (en) * 2021-11-29 2022-03-08 成都成电光信科技股份有限公司 Variable step length scheduling method for time trigger message in TT-FC network
CN116633808A (en) * 2023-07-19 2023-08-22 成都成电光信科技股份有限公司 Data monitoring system and method under time-triggered fiber channel network
CN116633808B (en) * 2023-07-19 2023-10-03 成都成电光信科技股份有限公司 Data monitoring system and method under time-triggered fiber channel network

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