CN112600726A - Multi-station networking real-time data interaction method - Google Patents
Multi-station networking real-time data interaction method Download PDFInfo
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- CN112600726A CN112600726A CN202011352692.8A CN202011352692A CN112600726A CN 112600726 A CN112600726 A CN 112600726A CN 202011352692 A CN202011352692 A CN 202011352692A CN 112600726 A CN112600726 A CN 112600726A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
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- H—ELECTRICITY
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- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
- H04J3/0658—Clock or time synchronisation among packet nodes
- H04J3/0661—Clock or time synchronisation among packet nodes using timestamps
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- H—ELECTRICITY
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/10—Active monitoring, e.g. heartbeat, ping or trace-route
- H04L43/106—Active monitoring, e.g. heartbeat, ping or trace-route using time related information in packets, e.g. by adding timestamps
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Abstract
The invention discloses a multi-station networking real-time data interaction method, which solves the problem of poor robustness of the existing method. The method comprises the following steps: for the ith station in the networking, measuring the link transmission delay with other stations at each measuring time, adding the timestamp information of the measuring time, and establishing and transmitting the sending information after framing; for the ith station in the networking, receiving the sending information framing in real time, and extracting the link transmission delay and the measuring time timestamp information related to the receiving station; after time stamp alignment is carried out on signals transmitted and received by the ith station, the time difference between the station and other stations is calculated by utilizing a two-way time comparison principle; wherein, i is the station serial number in the networking, i is 1,2, … …, N is the total number of stations in the networking, and N is more than or equal to 3. The invention can realize the non-centralized multi-station real-time difference measurement.
Description
Technical Field
The invention relates to the field of bidirectional data interaction, in particular to a multi-station networking real-time data interaction method.
Background
At present, two-way time comparison has two data interaction modes of non-networking and networking when in use, and the final purpose of the two-way time comparison is to obtain the link propagation delay of the station measured by the station in any mode. The current networking comparison is a star-shaped working mode that a master station carries a plurality of slave stations, the master station uses single-channel transmitting and multi-channel receiving equipment, the slave stations use single-channel transmitting and receiving equipment, only the master station can measure and interact link propagation delay data of the slave stations, the slave stations cannot measure and interact link propagation delay data, namely, only the master station can obtain a plurality of time differences between the master station and the slave stations, but only the slave stations can obtain a single time difference between the slave stations and the master station, and the slave stations cannot obtain respective time differences. Once the master station fails, the whole networking system is difficult to continue to work.
Disclosure of Invention
The invention provides a multi-station networking real-time data interaction method, which solves the problem of poor robustness of the existing method.
In order to solve the problems, the invention is realized as follows:
the embodiment of the invention discloses a multi-station networking real-time data interaction method, which comprises the following steps: for the ith station in the networking, measuring the link transmission delay with other stations at each measuring time, adding the timestamp information of the measuring time, and establishing and transmitting the sending information after framing; for the ith station in the networking, receiving the sending information framing in real time, and extracting the link transmission delay and the measuring time timestamp information related to the receiving station; after time stamp alignment is carried out on signals transmitted and received by the ith station, the time difference between the station and other stations is calculated by utilizing a two-way time comparison principle; wherein, i is the station serial number in the networking, i is 1,2, … …, N is the total number of stations in the networking, and N is more than or equal to 3.
Preferably, the framing of the transmission information of the ith station further includes: the ith station's own transmission delay.
Preferably, the step of measuring the transmission delay between the ith station and other stations at each measurement time in the pair of networked stations further includes: and transmitting an ith station time comparison signal to the ith station in the networking at each measurement moment, receiving echo signals corresponding to other stations, and obtaining link transmission delay of the ith station and other stations.
Preferably, the time difference between the ith station and the other stations is: (Pdj_i-Pdi_j) And/2, wherein j is the station serial number of other stations in the network, j is 1,2, … …, N, and j is not equal to i.
Further, N is less than or equal to (A-C)/B, wherein A is the minimum value of the maximum transmission capability of each station in the networking, B is transmission resources occupied by transmission delay of each link, and C is transmission resources occupied by the timestamp information at the measurement time.
Further, the ith station receives the sending information framing in real time through N-channel receiving equipment, and each channel in the N-channel receiving equipment receives the sending information framing of a corresponding station in the networking.
Preferably, each of the measurement time instants is a periodic or non-periodic time instant.
Preferably, for the ith station in the network, the step of measuring the transmission delay with other stations at each measurement time further includes: and transmitting an ith station time comparison signal to an ith station in the networking at each measurement moment, receiving echo signals corresponding to other stations and echo signals of the ith station, and obtaining link transmission delay of the ith station and other stations and transmission delay of the ith station.
Preferably, for the ith station in the networking, the sending information of each measuring time is framed and modulated on the time contrast signal of the ith station and then transmitted.
Preferably, the period of each measurement time is 1 s.
The beneficial effects of the invention include: the invention provides a decentralized two-way multi-station networking real-time data interaction method, which can realize decentralized two-way time comparison of multiple stations, and the normal operation of the whole networking system cannot be influenced by the entrance, exit or fault of any station, so that the robustness is very strong.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a flow chart of an embodiment of a real-time data interaction method for multi-station networking;
fig. 2 is a flowchart of an embodiment of a real-time data interaction method for multi-station networking including link transmission delay calculation.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The bidirectional time comparison is the internationally recognized highest-precision time comparison method at present, is widely applied to international high-precision time frequency magnitude remote comparison, and has no substitution in the positions of time frequency magnitude transmission and tracing methods. The bidirectional time comparison utilizes a signal spread spectrum modulation technology to carry out high-precision spread spectrum modulation transmission on related information of a timing signal, the signal is transmitted through a satellite, a microwave or an optical fiber link, the remote comparison station carries out quick capture, precise tracking and precise resolving on the signal to obtain signal propagation delay, time difference information between the comparison stations can be accurately obtained by exchanging propagation delay data, and nanosecond-level time synchronization level can be obtained. The bidirectional method is widely applied to multiple fields of satellite navigation, deep space exploration, unmanned aerial vehicle formation and the like.
The innovation points of the invention are as follows: firstly, the invention establishes the sending information framing for each station in the networking, so that each station can carry out time alignment according to the time stamp in the sending information framing to obtain the link transmission delay with other stations; secondly, each station in the networking of the invention adopts a multi-channel bidirectional receiving and single-channel transmitting technology, so that each station can measure and interact with the link transmission delay of other stations.
The technical solutions provided by the embodiments of the present invention are described in detail below with reference to the accompanying drawings.
Fig. 1 is a flow embodiment of a real-time data interaction method for multi-station networking, which can be used for data interaction among stations under the multi-station networking condition, and as an embodiment of the present invention, the real-time data interaction method for multi-station networking specifically includes the following steps 101 to 103:
step 101, for the ith station in the networking, measuring the link transmission delay with other stations at each measuring time, adding the timestamp information of the measuring time, and establishing the sending information for framing and then transmitting.
In the embodiment of the invention, i is a station serial number in the networking, i is 1,2, … …, N is the total number of stations in the networking, N is equal to or greater than 3, and N is an integer.
In step 101, the step of measuring the transmission delay between the ith station and other stations at each measurement time in the pair of networked stations further includes: and transmitting an ith station time comparison signal to the ith station in the networking at each measurement moment, receiving echo signals corresponding to other stations, and obtaining link transmission delay of the ith station and other stations.
In step 101, each measurement time is a periodic or non-periodic time, for example, the period of each measurement time is 1 s.
Specifically, assuming that N stations (1,2,3, …, N) participate in networking and each transmit its own time comparison signal every second (i.e., each measurement time), the N stations simultaneously measure link transmission delay data with N-1 stations other than the station through a satellite, a microwave or an optical fiber link by using N-channel receiving equipment, and each station records time stamp information of the measurement time.
Taking the ith station as an example, the timestamp information of the link delay measurement Time per second is defined as TimeiMeasuring the link transmission time delay of other stations and the station as Pdi_1，Pdi_2，……，Pdi_NThe subscript i _ j indicates that the ith station measures the jth station, j is the station serial number of other stations in the network, j is 1,2, … …, N, and j ≠ i, then the transmission information framing of the ith station is as shown in table 1 below:
TABLE 1 framing of transmission information for station i
| Timei | Pdi_1 | Pdi_2 | Pdi_3 | …… | Pdi_N |
By analogy, all N stations send a frame of information in the form of the following table 2:
table 2N stations transmit information framing
It should be noted that the sending information framing of each measurement time can be represented by the above table 1 and table 2, and the sending information framing of each measurement time is not differentiated in mathematical symbols in the present invention, because each measurement time is not the key point of the present invention, and the present invention is used to illustrate that the sending and receiving have real-time performance.
In step 101, for the ith station in the networking, the sending information of each measuring time is framed and modulated on the ith station time contrast signal, and then the modulated sending information is transmitted.
Specifically, according to the bidirectional comparison principle, the N stations frame-modulate their own transmission information to corresponding time comparison signals every second, and transmit the signals through a satellite, a microwave or an optical fiber link for demodulation and reception by N station receiving devices, thereby realizing inter-station transmission delay data interaction.
And 102, receiving the sending information framing in real time for the ith station in the networking, and extracting the link transmission delay and the measuring time timestamp information related to the receiving station.
In step 102, N stations receive the signal transmitted by each station in step 101 through respective N-channel demodulation devices every second to obtain N information frames, and extract the data of link propagation delay and the timestamp information of other stations in the N information frames, for example, for an ith station, it is necessary to extract Time1, Pd in the received N transmission information framing frames1_i，Time2，Pd2_i，……，TimeN，PdN_iAnd storing the extract locally. And by analogy, other stations also extract and store corresponding link transmission delay and measurement timestamp information.
It should be noted that, in the embodiment of the present invention, the ith station extracts only link transmission delay and measurement time stamp information with other stations.
And 103, after time stamp alignment is carried out on the signals transmitted and received by the ith station, the time difference between the station and other stations is calculated by utilizing a bidirectional time comparison principle.
In step 103, the N stations respectively align the time stamps of the information frames transmitted by the station and the received, extracted and stored information, and use the two-way time comparison principle to obtain the time intervals between the station and other stations.
For example, for the ith station, thisThe information frames transmitted by the station per second are: timei，Pdi_1，Pdi_2，……，Pdi_NAnd the information extracted per second is Time1，Pd1_i，Time2，Pd2_i，……，TimeN，PdN_iWill TimeiAnd Time1，Time2，Time3，……，TimeNAnd the time difference between the ith station and other stations can be obtained after the link transmission time delay at the same time corresponds to the subtraction of 2.
Namely, the time difference between the ith station and other stations is: (Pdj_i-Pdi_j) And/2, wherein j is the station serial number of other stations in the network, j is 1,2, … …, N, and j is not equal to i.
By analogy, any station in the networking can mutually obtain the time difference with other stations, so that the normal operation of the whole networking system cannot be influenced by the entrance, exit or fault of any station.
In the process of using the data interaction method, as the number of stations participating in networking is more, the data volume of the link transmission delay required to be interacted among the stations is larger, once the maximum interaction transmission capability which can be borne by modulation signals of the stations is exceeded, the system does not allow a new station to be added into a comparison network, and the number N of the stations participating in networking needs to be limited to a certain extent.
Further, N is less than or equal to (A-C)/B, wherein A is the minimum value of the maximum transmission capability of each station in the networking, B is transmission resources occupied by transmission delay of each link, and C is transmission resources occupied by the timestamp information at the measurement time.
If the maximum transmission capability of each station is Abit, transmitting the time delay data Pdi_jThe occupied resource is Bbit, and the Time stamp Time of the measuring TimeiAnd if the occupied resource is Cbit, the maximum number N of stations allowed to participate in the networking should meet the condition that N is less than or equal to (A-C)/B.
In the embodiment of the invention, each station in the networking uses a multi-channel bidirectional receiving device and a single-channel transmitting device, and each station can measure and interact with link transmission delay between other stations.
The embodiment of the invention provides a decentralized two-way multi-station networking real-time data interaction method, which can realize non-centralized multi-station real-time difference measurement and non-centralized multi-station two-way time comparison, and has strong robustness, and the normal operation of the whole networking system cannot be influenced by the entrance, exit or fault of any station.
Fig. 2 is a flowchart of an embodiment of a method for real-time data interaction in a multi-station networking, where the method includes link transmission delay calculation, and the sent information framing includes transmission delays of stations themselves, and as an embodiment of the present invention, the method for real-time data interaction in a multi-station networking specifically includes the following steps 201 to 201:
Wherein, i is the station serial number in the networking, i is 1,2, … …, N is the total number of stations in the networking, and N is more than or equal to 3.
In step 201, N stations (1,2,3, …, N) participate in networking, and each transmit its own time comparison signal every second, so that the N stations simultaneously measure link transmission delay data with other N-1 stations except the own station through a satellite, a microwave or an optical fiber link by using N-channel receiving equipment, and simultaneously each of the N stations also receives its own signal for monitoring the working state of its own transmitted signal, and simultaneously each station records the time stamp information of the measurement time.
In step 202, taking the ith station as an example, the timestamp information of the link delay measurement Time per second is defined as TimeiMeasuring the link transmission time delay of other stations and the station as Pdi_1，Pdi_2，……，Pdi_NThe subscript i _ j indicates that the ith station measures the jth station, j is the station serial numbers of other stations in the network, j is 1,2, … …, N and j is not equal to i, and the subscript i _ i indicates the own transmission delay of the ith station, so that the ith stationThe transmission information framing is as shown in table 3 below:
table 3 framing of transmission information for ith station
| Timei | Pdi_1 | Pdi_2 | Pdi_3 | …… | Pdi_N |
By analogy, all N stations send a frame of information in the form of the following table 4:
table 4 framing of N station transmissions
In step 202, for the ith station in the networking, the sending information of each measuring time is framed and modulated on the ith station time contrast signal, and then the ith station is transmitted.
Step 203, for the ith station in the networking, receiving the sending information framing in real time, and extracting the link transmission delay and the measurement time timestamp information related to the receiving station.
In step 203, the link transmission delay and the timestamp information of the measurement time received by the ith station further include the transmission delay of the ith station itself.
Otherwise, step 203 is the same as step 102 and is not repeated here.
And step 204, after time stamp alignment is carried out on the signals transmitted and received by the ith station, the time difference between the station and other stations is calculated by utilizing a bidirectional time comparison principle.
Step 204 of calculating the time difference between the ith station and the other stations is the same as step 103 and is not repeated here.
It is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (10)
1. A multi-station networking real-time data interaction method is characterized by comprising the following steps:
for the ith station in the networking, measuring the link transmission delay with other stations at each measuring time, adding the timestamp information of the measuring time, and establishing and transmitting the sending information after framing;
for the ith station in the networking, receiving the sending information framing in real time, and extracting the link transmission delay and the measuring time timestamp information related to the receiving station;
after time stamp alignment is carried out on signals transmitted and received by the ith station, the time difference between the station and other stations is calculated by utilizing a two-way time comparison principle;
wherein, i is the station serial number in the networking, i is 1,2, … …, N is the total number of stations in the networking, and N is more than or equal to 3.
2. The multi-station networking real-time data interaction method as claimed in claim 1, wherein said framing of said transmission information of the ith station further comprises: the ith station's own transmission delay.
3. The method as claimed in claim 1, wherein the step of measuring the transmission delay between the ith station and other stations at each measurement time in the paired networking further comprises:
and transmitting an ith station time comparison signal to the ith station in the networking at each measurement moment, receiving echo signals corresponding to other stations, and obtaining link transmission delay of the ith station and other stations.
4. The multi-station networking real-time data interaction method of claim 1, wherein the time difference between the ith station and other stations is: (Pdj_i-Pdi_j) And/2, wherein j is the station serial number of other stations in the network, j is 1,2, … …, N, and j is not equal to i.
5. The method of claim 1, wherein N ≦ (a-C)/B, where a is a minimum value of a maximum transmission capability of each station in the network, B occupies a transmission resource for each of the link transmission delays, and C occupies a transmission resource for the measurement time stamp information.
6. The multi-station networking real-time data interaction method of claim 1, wherein the ith station receives the transmission information framing in real time through N-channel receiving equipment, and each channel in the N-channel receiving equipment receives the transmission information framing of a corresponding station in networking.
7. The multi-station networking real-time data interaction method as claimed in claim 1, wherein each measurement time is a periodic or non-periodic time.
8. The multi-station networking real-time data interaction method as claimed in claim 2, wherein the step of measuring the transmission delay between the ith station and other stations at each measurement time in the networking further comprises:
and transmitting an ith station time comparison signal to an ith station in the networking at each measurement moment, receiving echo signals corresponding to other stations and echo signals of the ith station, and obtaining link transmission delay of the ith station and other stations and transmission delay of the ith station.
9. A multi-station networking real-time data interaction method as claimed in claim 3 or 8, characterized in that, for the ith station in the networking, the transmitted information of each measurement time is framed and modulated onto the ith station time contrast signal and then transmitted.
10. The multi-station networking real-time data interaction method as claimed in claim 7, wherein the period of each measurement time is 1 s.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114422067A (en) * | 2021-12-30 | 2022-04-29 | 北京无线电计量测试研究所 | Processing method for static networking data interaction |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1668029A (en) * | 2004-03-10 | 2005-09-14 | 朗迅科技公司 | Method, apparatus and system for the synchronized combining of packet data |
| CN101114947A (en) * | 2006-07-27 | 2008-01-30 | 华为技术有限公司 | Method for measuring performance of cooperative communication system |
| US7535931B1 (en) * | 2003-07-14 | 2009-05-19 | Symmetricom, Inc. | Two-way timing protocol |
| US20130329753A1 (en) * | 2011-02-21 | 2013-12-12 | Mitsubishi Electric Corporation | Communication apparatus and communication method |
| CN106452561A (en) * | 2016-09-27 | 2017-02-22 | 北京无线电计量测试研究所 | Satellite bidirectional time alignment system among multiple stations |
| CN107425936A (en) * | 2017-06-15 | 2017-12-01 | 西安微电子技术研究所 | A kind of transparent clock measurement apparatus |
| CN109586831A (en) * | 2018-11-27 | 2019-04-05 | 北京跟踪与通信技术研究所 | Communication device, method, system, electronic equipment and computer readable storage medium |
-
2020
- 2020-11-26 CN CN202011352692.8A patent/CN112600726B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7535931B1 (en) * | 2003-07-14 | 2009-05-19 | Symmetricom, Inc. | Two-way timing protocol |
| CN1668029A (en) * | 2004-03-10 | 2005-09-14 | 朗迅科技公司 | Method, apparatus and system for the synchronized combining of packet data |
| CN101114947A (en) * | 2006-07-27 | 2008-01-30 | 华为技术有限公司 | Method for measuring performance of cooperative communication system |
| US20130329753A1 (en) * | 2011-02-21 | 2013-12-12 | Mitsubishi Electric Corporation | Communication apparatus and communication method |
| CN106452561A (en) * | 2016-09-27 | 2017-02-22 | 北京无线电计量测试研究所 | Satellite bidirectional time alignment system among multiple stations |
| CN107425936A (en) * | 2017-06-15 | 2017-12-01 | 西安微电子技术研究所 | A kind of transparent clock measurement apparatus |
| CN109586831A (en) * | 2018-11-27 | 2019-04-05 | 北京跟踪与通信技术研究所 | Communication device, method, system, electronic equipment and computer readable storage medium |
Non-Patent Citations (2)
| Title |
|---|
| 杨文哲: "基于FBOC调制的高精度光纤双向时频比对方法", 《光通信技术》 * |
| 王学运等: "全新卫星双向时间比对调制解调器设计", 《电子学报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114422067A (en) * | 2021-12-30 | 2022-04-29 | 北京无线电计量测试研究所 | Processing method for static networking data interaction |
| CN114422067B (en) * | 2021-12-30 | 2024-03-29 | 北京无线电计量测试研究所 | Static networking data interaction processing method |
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