CN103124204A - Signal relay system, data transmission method thereof and data transmission format thereof - Google Patents
Signal relay system, data transmission method thereof and data transmission format thereof Download PDFInfo
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- CN103124204A CN103124204A CN2011103690359A CN201110369035A CN103124204A CN 103124204 A CN103124204 A CN 103124204A CN 2011103690359 A CN2011103690359 A CN 2011103690359A CN 201110369035 A CN201110369035 A CN 201110369035A CN 103124204 A CN103124204 A CN 103124204A
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Abstract
The invention discloses a signal relay system, a data transmission method thereof and a data transmission format thereof, and relates to the technical field of communication, signal acquisition, signal switching and signal conversion. The data transmission method of the signal relay system includes the steps: taking one or more clock cycle as a time slot of the signal relay system by a network side; and forming a frame datum by a plurality of time slots. Each frame datum transmitted by the network side includes frame synchronization header information, clock calibration information, time mark information, configuration management information, data content and CRC (cyclic redundancy check) information. By the aid of the technical scheme, a multi-user, low-latency, high-bandwidth and high-reliability interworking relay interconnection mode among various electrical devices is realized.
Description
Technical field
The present invention relates to communication, signals collecting, handshaking and signal switch technology field, particularly a kind of signal relay system and data transmission method thereof, data transmission format.
Background technology
In the laboratory uniting and adjustment of mega project, because the quantity of equipment is large, kind is many, delay requirement to equipment is strict, wish that the time-delay of equipment can control, the bandwidth of adding data volume is very large, according to these characteristics, need to provide a kind of data transfer mode that can be used for the laboratory uniting and adjustment of mega project.
Summary of the invention
Technical problem to be solved by this invention is, how to realize interconnecting between the polytype electric equipment in the laboratory uniting and adjustment of mega project, therefore a kind of signal relay system and data transmission method thereof, data transmission format are provided.
In order to address the above problem, the invention discloses a kind of data transmission method of signal relay system, comprising:
Network side with one or more clock cycle of signal relay system as 1 time slot, a plurality of time slots consist of frame data, wherein, each frame data of sending of network side comprise frame synchronization header, clock check information, time scale information, configuration management information, data content and cyclic redundancy check (CRC) code (CRC) check information.
Preferably, in said method, as 1 time slot, every 125 time slots consist of frame data to described network side with clock cycle of signal relay system.
Preferably, in said method, the process that described network side sends each frame data is as follows:
Described network side sends described frame synchronization header on No. 0 time slot of each frame, send described clock check information on No. 1 time slot, send described time scale information on No. 2 time slot, send described configuration management information on No. 3 time slot, send described data content on No. 4 to No. 123 time slot, send described CRC check information on No. 124 time slot.
Preferably, in said method, when end side received each frame data, order received frame synchronization header, clock check information, time scale information, configuration management information, data content and the CRC check information of each frame data.
The invention also discloses a kind of signal relay system, comprise network equipment and terminal equipment, described network equipment is divided into:
Dispensing unit is configured to 1 time slot with one or more clock cycle of signal relay system, configures a plurality of time slots and consists of frame data;
Transmitting element when sending each frame data, sends frame synchronization header, clock check information, time scale information, configuration management information, data content and cyclic redundancy check (CRC) code (CRC) check information.
Preferably, in said system, dispensing unit is configured to 1 time slot with clock cycle of signal relay system, configures every 125 time slots and consists of frame data;
Transmitting element, when sending each frame data, send described frame synchronization header on No. 0 time slot, send described clock check information on No. 1 time slot, send described time scale information on No. 2 time slot, send described configuration management information on No. 3 time slot, send described data content on No. 4 to No. 123 time slot, send described CRC check information on No. 124 time slot.
Preferably, in said system, described terminal equipment is divided into:
Receiving element receives each frame data that described network side sends;
Processing unit, order is obtained frame synchronization header, clock check information, time scale information, configuration management information, data content and the CRC check information of every frame data from each frame data.
The invention also discloses a kind of data transmission format of signal relay system, each frame data is made of 125 time slots, and a clock cycle of signal relay system is as 1 time slot, wherein:
No. 0 time slot of each frame data is used for load carrying frame synchronous head information, No. 1 time slot is used for carrying clock check information, No. 2 time slot is used for the carrying time scale information, No. 3 time slot is used for carrying configuration management information, No. 4 to No. 123 time slot is used for the carrying data content, and No. 124 time slot is used for carrying cyclic redundancy check (CRC) code (CRC) check information
The application's technical scheme has realized the multi-user, low delay, high bandwidth, the highly reliable trunk interconnection mode that interconnects between the polytype electric equipment.
Description of drawings
Fig. 1 is the schematic diagram of data transmission format in the present embodiment.
Embodiment
In order to make the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, technical solution of the present invention is described in further detail.Need to prove, in the situation that do not conflict, the application's embodiment and the feature in embodiment can make up arbitrarily mutually.
The present embodiment provides a kind of signal relay system, and this system comprises network equipment and terminal equipment.The below introduces the function of each several part.
Network equipment according to the instruction of Client-initiated routing configuration, is controlled the source terminal equipment uploading data in this routing configuration, and the exchanges data that source terminal equipment is uploaded is given the target terminal equipment in this routing configuration.Wherein, the exchanges data that network equipment is uploaded source terminal equipment is during to target terminal equipment, adopted the mode of time slot to realize transmission and the exchange of data.In the present embodiment, the signal relay system comprises many station terminals equipment, and at this moment, network equipment mainly refers to optical fiber switch.
Particularly, network equipment can be divided into dispensing unit and transmitting element.
Dispensing unit is configured to 1 time slot with one or more clock cycle of signal relay system, configures a plurality of time slots and consists of frame data, and one of them time slot comprises a plurality of bit (for example, 8 bit);
Transmitting element when sending each frame data, sends frame synchronization header, clock check information, time scale information, configuration management information, data content and cyclic redundancy check (CRC) code (CRC) check information.
Wherein, the frame synchronization header is for detection of frame synchronization.
Whether clock check information is used for the check system clock correct.
Time scale information is used for the markers calibration.
Configuration management information is used to indicate the control information of receiving terminal transmission or receive data.
Data content is the authentic data of transmission.
CRC check information is used for carrying out mistake school inspection.
Preferably, the dispensing unit in network equipment is configured to 1 time slot with clock cycle of signal relay system, configures every 125 time slots and consists of frame data; At this moment, transmitting element, when sending each frame data, send the frame synchronization header on No. 0 time slot, tranmitting data register check information on No. 1 time slot sends time scale information on No. 2 time slot, send configuration management information on No. 3 time slot, send data content on No. 4 to No. 123 time slot, send CRC check information on No. 124 time slot.
Certainly according to different application scenarioss, the dispensing unit in network equipment also can configure frame data and be consisted of by being greater than or less than 125 time slots.
Terminal equipment, according to the control uploading data of network equipment, and according to the control receive data of network equipment.This terminal equipment can think to treat the laboratory of relaying, is the combination of photoelectric adapter and electric interfaces card.Electric interfaces is placed on photoelectric adapter, in order to adapt to the link of multiple electric equipment, therefore include a plurality of polytype electric interfaces cards on a photoelectric adapter.Same, also can comprise one or more photoelectric adapters on a terminal equipment.
Wherein, the interface of electric interfaces card and base plate is unified, compatible all electrical characteristics and performance requirement.For all electric interfaces, what base plate was seen is on all four data format, and difference is embodied on the corresponding relation of time slot and data fully, and this corresponding relation determines by configurable routing table.Base plate also determines for the bandwidth that each electric interfaces card distributes by configurable routing table.The lowest-bandwidth of interface is that (16Mbps of 8bit * 2M/s=) takies a time slot of optical fiber; The maximum bandwidth of interface is (32bit * 32M/s)=1024Mbps.If interface needs larger bandwidth (surpassing 1024Mbps), can bundle 2 or a plurality of adapter interface and use together, this need to just take into account in the design adapter card circuit.
For the time-delay that makes the signal relaying reaches minimum, generally adopt sample mode to realize collection and the recovery of signal.RS232 signal for example, the signal relay system also is indifferent to the concrete protocol characteristics such as start bit, data bit, check digit, position of rest, but directly signal level is gathered and recover in the mode of high-speed sampling, realizes the signal relaying.For RS232, RS422, ARINC429, the discrete IO of digital quantity, the processing method of multi-functional row ground relay system is consistent, and different is only interface level.
Signal relay system relay transmission be not only valid data, but reappear line status fully, comprise that line errors also can carry out relay transmission and reduction faithfully.
For Ethernet/ARINC664, vision signal, the processing method of signal relay system is slightly different, but basic principle is the same.
For all signals, the time-delay of signal relay system is 10us.System delay comprises that signals collecting time-delay, signal reduction are delayed time, 2 grades of exchange time-delays, signals are processed time-delay etc., does not delay time but count spread fiber.(annotate: the propagation delay of optical fiber is every km 5us).
Special case: for the CAN signal, due to unique requirement of agreement itself, the signal relay system adopts the mode of storage forwarding, and system delay has increased 65us in addition on the basis of above-mentioned 10us, amount to 75us.
And be to receive according to the data format with the network side agreement during above-mentioned terminal equipment receive data.Particularly, terminal equipment can be divided into receiving element and processing unit.
Receiving element receives each frame data that network side sends;
Processing unit, order is obtained frame synchronization header, clock check information, time scale information, configuration management information, data content and the CRC check information of every frame data from each frame data.
In preferred version, if network side is configured to 1 time slot with a clock cycle of signal relay system, when configuring 125 time slots formation one frame data, the processing unit of terminal equipment obtains the frame synchronization header from No. 0 time slot of each frame data, obtain clock check information from No. 1 time slot, obtain time scale information from No. 2 time slot, obtain configuration management information from No. 3 time slot, time slot obtains data content from No. 4 to No. 123, obtains CRC check information from No. 124 time slot.
The present embodiment is introduced a kind of data transmission method of signal relay system, and the implementation procedure of the method is as follows:
Network side with one or more clock cycle of signal relay system as 1 time slot, a plurality of time slots consist of frame data, wherein, when network side sent each frame data, order sent frame synchronization header, clock check information, time scale information, configuration management information, data content and cyclic redundancy check (CRC) code (CRC) check information.
Preferably, every 125 time slots consist of frame data as 1 time slot the clock cycle that network side can the signal relay system.At this moment, when network side sends each frame data, to send the frame synchronization header on No. 0 time slot of each frame, tranmitting data register check information on No. 1 time slot, send time scale information on No. 2 time slot, send configuration management information on No. 3 time slot, send data on No. 4 to No. 123 time slot, send CRC check information on No. 124 time slot.
That is to say, in preferred version, signal relay system signal has adopted the mode of time slot to realize transmission and the exchange of data.Fiber port speed is 2.5Gbps, and after carrying out 8b/10b code parsing and string and conversion through the inner GTX/GTP of FPGA, data rate is 250MHz, and data bit width is 8bit.Setting each 250MHz clock cycle is 1 time slot, every 125 time slots are frame data, carry out there is no idle condition between every frame data in data transmission procedure, that is to say that Frame and Frame are that each frame all is connected, it's a clock cycle can not to the centre.The data format of every frame data as shown in Figure 1,125 time slots from 0 to 124 time slot respectively are numbered.No. 0 time slot is frame synchronization head (also claiming the comma code), is fixed as 0xBC, is to be fixed as the k28.5 coding in the 8B/10B coding, and effect is for frame synchronization, is unique in each frame, does not have any data identical with it.No. 1 time slot is the clock alignment time slot, is fixing 0xDC, is to be fixed as the K28.6 coding in the 8B/10 coding schedule, and effect is the adjustment code for clock synchronous.No. 2 time slot is the markers time slot, and the markers that is used for the signal relay system is synchronous.By the current markers of signal relay system software control, forward by system-wide markers, carry out target calibration when system-wide.No. 3 time slot is as the management time slot, plays the information exchange effect of equipment between the signal relay system, can be used for telemanagement, register read-write and routing configuration.The the 4th to No. 123 time slot is used for transfer of data as business time-slot.No. 124 time slot, CRC (Cyclic Redundancy Check as frame data, cyclic redundancy check (CRC) code) data check uses, CRC check is the mode by checksummat, the verification of contrast receive data and whether identical with the CRC data bit value of receive data, identical CRC check is passed through, otherwise the CRC check mistake.
Based on above-mentioned data transmission format, when end side receives every frame data, be also frame synchronization header, clock check information, time scale information, configuration management information, data content and the CRC check information that order receives every frame data.Particularly, end side sends the frame synchronization header on No. 0 time slot of each frame, tranmitting data register check information on No. 1 time slot, send time scale information on No. 2 time slot, send configuration management information on No. 3 time slot, send data on No. 4 to No. 123 time slot, send CRC check information on No. 124 time slot.
Embodiment 3
The present embodiment is introduced a kind of data transmission format of signal relay system, can be used for the signal relay system that above-described embodiment 1 provides, the structure of this data transmission format as shown in Figure 1, each frame data is made of 125 time slots, a clock cycle of signal relay system is as 1 time slot.No. 0 time slot of each frame data is used for load carrying frame synchronous head information, No. 1 time slot is used for carrying clock check information, No. 2 time slot is used for the carrying time scale information, No. 3 time slot is used for carrying configuration management information, No. 4 to No. 123 time slot is used for the carrying data content, and No. 124 time slot is used for carrying cyclic redundancy check (CRC) code (CRC) check information.
One of ordinary skill in the art will appreciate that all or part of step in said method can come the instruction related hardware to complete by program, described program can be stored in computer-readable recording medium, as read-only memory, disk or CD etc.Alternatively, all or part of step of above-described embodiment also can realize with one or more integrated circuits.Correspondingly, each the module/unit in above-described embodiment can adopt the form of hardware to realize, also can adopt the form of software function module to realize.The application is not restricted to the combination of the hardware and software of any particular form.
The above is only preferred embodiments of the present invention, is not for limiting protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (8)
1. the data transmission method of a signal relay system, is characterized in that, the method comprises:
Network side with one or more clock cycle of signal relay system as 1 time slot, a plurality of time slots consist of frame data, wherein, each frame data of sending of network side comprise frame synchronization header, clock check information, time scale information, configuration management information, data content and cyclic redundancy check (CRC) code (CRC) check information.
2. the method for claim 1, is characterized in that, as 1 time slot, every 125 time slots consist of frame data to described network side with clock cycle of signal relay system.
3. method as claimed in claim 2, is characterized in that, the process that described network side sends each frame data is as follows:
Described network side sends described frame synchronization header on No. 0 time slot of each frame, send described clock check information on No. 1 time slot, send described time scale information on No. 2 time slot, send described configuration management information on No. 3 time slot, send described data content on No. 4 to No. 123 time slot, send described CRC check information on No. 124 time slot.
4. method as claimed in claim 3, is characterized in that,
When end side received each frame data, order received frame synchronization header, clock check information, time scale information, configuration management information, data content and the CRC check information of each frame data.
5. a signal relay system, comprise network equipment and terminal equipment, it is characterized in that, described network equipment is divided into:
Dispensing unit is configured to 1 time slot with one or more clock cycle of signal relay system, configures a plurality of time slots and consists of frame data;
Transmitting element when sending each frame data, sends frame synchronization header, clock check information, time scale information, configuration management information, data content and cyclic redundancy check (CRC) code (CRC) check information.
6. system as claimed in claim 5, is characterized in that,
Dispensing unit is configured to 1 time slot with clock cycle of signal relay system, configures every 125 time slots and consists of frame data;
Transmitting element, when sending each frame data, send described frame synchronization header on No. 0 time slot, send described clock check information on No. 1 time slot, send described time scale information on No. 2 time slot, send described configuration management information on No. 3 time slot, send described data content on No. 4 to No. 123 time slot, send described CRC check information on No. 124 time slot.
7. system as claimed in claim 6, is characterized in that, described terminal equipment is divided into:
Receiving element receives each frame data that described network side sends;
Processing unit, order is obtained frame synchronization header, clock check information, time scale information, configuration management information, data content and the CRC check information of every frame data from each frame data.
8. the data transmission format of a signal relay system, is characterized in that, each frame data is made of 125 time slots, and a clock cycle of signal relay system is as 1 time slot, wherein:
No. 0 time slot of each frame data is used for load carrying frame synchronous head information, No. 1 time slot is used for carrying clock check information, No. 2 time slot is used for the carrying time scale information, No. 3 time slot is used for carrying configuration management information, No. 4 to No. 123 time slot is used for the carrying data content, and No. 124 time slot is used for carrying cyclic redundancy check (CRC) code (CRC) check information.
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| CN117834027A (en) * | 2024-02-23 | 2024-04-05 | 北京中航通用科技有限公司 | Remote ultra-low delay relay method for half-duplex network |
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Application publication date: 20130529 |