CN102340378A - Fiber channel cyclic redundancy check (CRC) method for longitudinal protection - Google Patents
Fiber channel cyclic redundancy check (CRC) method for longitudinal protection Download PDFInfo
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- CN102340378A CN102340378A CN2011103235397A CN201110323539A CN102340378A CN 102340378 A CN102340378 A CN 102340378A CN 2011103235397 A CN2011103235397 A CN 2011103235397A CN 201110323539 A CN201110323539 A CN 201110323539A CN 102340378 A CN102340378 A CN 102340378A
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Abstract
The invention relates to a fiber channel sectionalized cyclic redundancy check (CRC) method for longitudinal protection. The method comprises that: when data is transmitted, a transmitter divides data information to be transmitted into a plurality of data sections, wherein a CRC code with a bit length equal to that of an information code is appended in each data section; and after receiving the data, a receiver performs conversion check on each data section according to the CRC code, discards data sections with errors when detecting the errors, and continues using data without any error. By the sectionalized CRC method, the CRC code and the information code have the equal bit length, so error codes of any form can be detected and an error detection rate is 100 percent. The transmission can be ensured to be absolutely reliable, so longitudinal fiber distance protection and remote tripping protection can act after a frame of signal is received, and the acting speed of the protection is further increased. Simultaneously, due to the adoption of the sectionalized CRC method, when a certain data section has the errors, the usage of the other data sections is not influenced, so the error resilience of a fiber channel can be greatly improved, and the acting speed of the protection can be increased.
Description
Technical field
The invention belongs to the relay protection of power system technical field, relate to a kind of pilot protection with optical fiber channel C RC method of calibration.
Background technology
The vertical main protection of power system high tension power line need be accomplished the exchanges data of two ends protective device by means of passage, to reach QA purpose completely.
High-voltage line protection by optical-fibre channel mainly contains at present: optical fiber differential protective, fiber distance protection; Wherein the fiber distance protection is sent local terminal protection judgment signal through optical-fibre channel; Whether this signal deciding allows opposite end protection tripping operation, therefore transmit fast, reliably judgment signal become the fiber distance protection can be fast, the key point of correct operation.
The conventional vertical optical-fibre channel data transmission format and the error detecing capability of method of calibration are relatively poor; Loss is bigger, and when having detected error code, also can't locate the position of error code; Therefore the fiber distance protection all adopts the mode of delay tripping to prevent the influence of error code to itself with jumping protection far away; And the time lengthening that the time-delay TRIP directly causes fault to exist impacts the stable operation of electrical network, also causes very big economic loss simultaneously.
Summary of the invention
The purpose of this invention is to provide a kind of pilot protection with optical-fibre channel segmentation CRC check method, effectively to detect any type of error code that produces in the optical-fibre channel transmission course.
For realizing above-mentioned purpose; Pilot protection of the present invention uses optical-fibre channel segmentation CRC check method and technology scheme to be: when carrying out transfer of data; The data message that transmitting terminal will transmit is divided into multiple segment data, in every segment data all with the CRC check sign indicating number position isometric with information code; After receiving terminal receives data, each segment data is carried out conversion check according to the CRC check sign indicating number, the segment data of when detecting mistake, will makeing mistakes abandon need not, do not have wrong data segment still to continue to use.
Further, the said transmitting terminal data message that will transmit is to be divided into multiple segment data according to importance.
Further, with in every segment data per 4 divide a data unit into, add 4 CRC check positions after each data cell, then high 4 information codes are a byte with low 4 bit check sign indicating numbers.
Further; Said 4 bit check sign indicating numbers adopt G.704 CRC-4 of ITU, and generator polynomial is:
.
Pilot protection of the present invention is with optical-fibre channel segmentation CRC check method; Owing to adopted segmentation CRC check method, and check code is isometric with information code, so can detect any type of error code; Error detection rate 100%; Because what can guarantee to transmit is absolute reliable, vertically join the fiber distance protection and jump protection and receive that a frame signal can act on and move with far away, improved the responsiveness of protection.Owing to adopt segmentation CRC check method, when one piece of data is wrong, do not influence the use of other segment data simultaneously, therefore can significantly improve the anti-error code capacity of optical-fibre channel, improve the responsiveness of protection.Though adopt segmentation CRC check method to increase the expense of transmission bandwidth; But the electric power system pilot protection optical fiber transport channel little for data amount transmitted, that reliability requirement is high is very significant; Simultaneously when carrying out segmentation verification and conversion check, introduce quick CRC check and conversion check algorithm, can effectively improve the processing speed of communication task.
Description of drawings
Fig. 1 is the sketch map that the road segmentation of vertical UNICOM increases the CRC check sign indicating number;
Fig. 2 is the sketch map of vertical UNICOM road segmentation CRC check method;
Fig. 3 is a vertical UNICOM road transferring data frames form sketch map.
Embodiment
Pilot protection is following with the step of optical-fibre channel segmentation CRC check method:
The vertical optical-fibre channel segmentation increase CRC check sign indicating number that joins, as shown in Figure 1, the data that vertical UNICOM road is transmitted are divided into multistage according to importance, and check code and information code that the significant data section is chosen are isometric;
The vertical road receiving terminal segmentation CRC of UNICOM conversion check method, as shown in Figure 2, according to check code each segment data is carried out conversion check after receiving data, when detecting error code after this segment data abandon need not, other does not have the data segment of error code to continue use;
Vertical UNICOM road transferring data frames form is as shown in Figure 3; It is a data unit that want information transmitted is divided into per 4; Each data cell increases by 4 CRC check position; Therefore the unit of transmission is a byte; High 4 is information code, and low 4 is check code, and each transmission data units can be transmitted 4 state quantity signals; 4 CRC check sign indicating number uses G.704 CRC-4 of ITU, and its generator polynomial is:
.
Claims (4)
1. a pilot protection is with optical-fibre channel segmentation CRC check method, and it is characterized in that: when carrying out transfer of data, the data message that transmitting terminal will transmit is divided into multiple segment data, in every segment data all with the CRC check sign indicating number position isometric with information code; After receiving terminal receives data, each segment data is carried out conversion check according to the CRC check sign indicating number, the segment data of when detecting mistake, will makeing mistakes abandon need not, do not have wrong data segment still to continue to use.
2. method according to claim 1 is characterized in that: the data message that said transmitting terminal will transmit is to be divided into multiple segment data according to importance.
3. method according to claim 1 and 2 is characterized in that: with in every segment data per 4 divide a data unit into, add 4 CRC check positions after each data cell, then high 4 information codes are a byte with low 4 bit check sign indicating numbers.
4. method according to claim 3; It is characterized in that: said 4 bit check sign indicating numbers adopt G.704 CRC-4 of ITU, and generator polynomial is:
.
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| CN2011103235397A CN102340378A (en) | 2011-10-23 | 2011-10-23 | Fiber channel cyclic redundancy check (CRC) method for longitudinal protection |
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| CN2011103235397A CN102340378A (en) | 2011-10-23 | 2011-10-23 | Fiber channel cyclic redundancy check (CRC) method for longitudinal protection |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104579561A (en) * | 2014-12-23 | 2015-04-29 | 国电南瑞科技股份有限公司 | Coding method for improving longitudinal differential protection performance |
| CN107370537A (en) * | 2017-06-21 | 2017-11-21 | 积成软件有限公司 | A kind of detection method of Fibre-optical Pilot Protection |
| CN109196801A (en) * | 2016-06-01 | 2019-01-11 | 高通股份有限公司 | Control signaling is coded and decoded using the redundancy check of segmented |
| CN111342893A (en) * | 2020-04-09 | 2020-06-26 | 中国南方电网有限责任公司超高压输电公司柳州局 | Channel fault point positioning method |
| CN111585686A (en) * | 2020-05-09 | 2020-08-25 | 国网浙江省电力有限公司信息通信分公司 | Data transmission method and device, electronic equipment and computer readable storage medium |
| CN112019485A (en) * | 2019-05-31 | 2020-12-01 | 华为技术有限公司 | Message generation and verification method and device |
| US11025276B2 (en) | 2016-05-12 | 2021-06-01 | Qualcomm Incorporated | Enhanced puncturing and low-density parity-check (LDPC) code structure |
| US11239860B2 (en) | 2016-06-14 | 2022-02-01 | Qualcomm Incorporated | Methods and apparatus for compactly describing lifted low-density parity-check (LDPC) codes |
| CN114285734A (en) * | 2021-12-29 | 2022-04-05 | 广西电网有限责任公司柳州供电局 | Communication monitoring system of transmission line based on optical cable splice closure |
| CN114339765A (en) * | 2021-11-25 | 2022-04-12 | 国网河南省电力公司电力科学研究院 | Differential protection data interactive chain type verification method and system based on 5G communication |
| US11671120B2 (en) | 2015-11-12 | 2023-06-06 | Qualcomm Incorporated | Puncturing for structured low density parity check (LDPC) codes |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104579561A (en) * | 2014-12-23 | 2015-04-29 | 国电南瑞科技股份有限公司 | Coding method for improving longitudinal differential protection performance |
| US11671120B2 (en) | 2015-11-12 | 2023-06-06 | Qualcomm Incorporated | Puncturing for structured low density parity check (LDPC) codes |
| US11025276B2 (en) | 2016-05-12 | 2021-06-01 | Qualcomm Incorporated | Enhanced puncturing and low-density parity-check (LDPC) code structure |
| CN109196801A (en) * | 2016-06-01 | 2019-01-11 | 高通股份有限公司 | Control signaling is coded and decoded using the redundancy check of segmented |
| CN109196801B (en) * | 2016-06-01 | 2021-07-09 | 高通股份有限公司 | Method and apparatus for encoding and decoding control signaling |
| US11239860B2 (en) | 2016-06-14 | 2022-02-01 | Qualcomm Incorporated | Methods and apparatus for compactly describing lifted low-density parity-check (LDPC) codes |
| US11496154B2 (en) | 2016-06-14 | 2022-11-08 | Qualcomm Incorporated | High performance, flexible, and compact low-density parity-check (LDPC) code |
| US11942964B2 (en) | 2016-06-14 | 2024-03-26 | Qualcomm Incorporated | Methods and apparatus for compactly describing lifted low-density parity-check (LDPC) codes |
| US11831332B2 (en) | 2016-06-14 | 2023-11-28 | Qualcomm Incorporated | High performance, flexible, and compact low-density parity-check (LDPC) code |
| CN107370537B (en) * | 2017-06-21 | 2019-10-25 | 积成软件有限公司 | A kind of detection method of Fibre-optical Pilot Protection |
| CN107370537A (en) * | 2017-06-21 | 2017-11-21 | 积成软件有限公司 | A kind of detection method of Fibre-optical Pilot Protection |
| WO2020238881A1 (en) * | 2019-05-31 | 2020-12-03 | 华为技术有限公司 | Message generating and verifying method and apparatus |
| CN112019485A (en) * | 2019-05-31 | 2020-12-01 | 华为技术有限公司 | Message generation and verification method and device |
| CN111342893A (en) * | 2020-04-09 | 2020-06-26 | 中国南方电网有限责任公司超高压输电公司柳州局 | Channel fault point positioning method |
| CN111342893B (en) * | 2020-04-09 | 2023-03-31 | 中国南方电网有限责任公司超高压输电公司柳州局 | Channel fault point positioning method |
| CN111585686A (en) * | 2020-05-09 | 2020-08-25 | 国网浙江省电力有限公司信息通信分公司 | Data transmission method and device, electronic equipment and computer readable storage medium |
| CN114339765A (en) * | 2021-11-25 | 2022-04-12 | 国网河南省电力公司电力科学研究院 | Differential protection data interactive chain type verification method and system based on 5G communication |
| CN114339765B (en) * | 2021-11-25 | 2024-01-19 | 国网河南省电力公司电力科学研究院 | Differential protection data interactive chain type verification method and system based on 5G communication |
| CN114285734A (en) * | 2021-12-29 | 2022-04-05 | 广西电网有限责任公司柳州供电局 | Communication monitoring system of transmission line based on optical cable splice closure |
| CN114285734B (en) * | 2021-12-29 | 2024-02-20 | 广西电网有限责任公司柳州供电局 | Communication monitoring system of transmission line based on optical cable splice box |
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Application publication date: 20120201 |