CN109547147B - Time division multiplexing multi-mode telemetering transmission design method - Google Patents
Time division multiplexing multi-mode telemetering transmission design method Download PDFInfo
- Publication number
- CN109547147B CN109547147B CN201811505430.3A CN201811505430A CN109547147B CN 109547147 B CN109547147 B CN 109547147B CN 201811505430 A CN201811505430 A CN 201811505430A CN 109547147 B CN109547147 B CN 109547147B
- Authority
- CN
- China
- Prior art keywords
- telemetry
- telemetering
- mode
- data
- frames
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- H04J3/1694—Allocation of channels in TDM/TDMA networks, e.g. distributed multiplexers
-
- 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
- H04J3/1682—Allocation of channels according to the instantaneous demands of the users, e.g. concentrated multiplexers, statistical multiplexers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2209/00—Arrangements in telecontrol or telemetry systems
- H04Q2209/80—Arrangements in the sub-station, i.e. sensing device
- H04Q2209/84—Measuring functions
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Computing Systems (AREA)
- General Health & Medical Sciences (AREA)
- Medical Informatics (AREA)
- Selective Calling Equipment (AREA)
Abstract
The invention provides a time-division multiplexing multi-mode telemetering transmission design method, which solves the problems of two information acquisition devices, limited telemetering transmission bandwidth and complicated and changeable telemetering data sources in data downloading. The method comprises the following steps: grouping possible power-on combinations of the test load multi-mode system in a task period, classifying equipment powered on simultaneously into one group, and corresponding to a telemetering framing mode; determining that the number of periodic repeating frames in each mode is an odd number, screening telemetering data to be transmitted in each mode, and encapsulating data with high importance degree into periodic telemetering frames; encapsulating random data downloading requirements during the working period of the system into random telemetry frames one by one; distinguishing different modes by different data identification codes at fixed positions of the periodic telemetry frames and the random telemetry frames; the periodic telemetry frames or the random telemetry frames are transmitted according to a telemetry data transmission period.
Description
Technical Field
The invention relates to a time division multiplexing multi-mode telemetering transmission design method which is suitable for telemetering transmission design of a telemetering bandwidth resource shortage and a telemetering data source complex and changeable system.
Background
A test load multi-mode system has a plurality of different power-on combinations on the track, and the telemetering data source (time, voltage, current, temperature, equipment working state, communication state, key measurement data and the like) to be downloaded changes along with the power-on state of the equipment. According to the information interface state of the system, two information acquisition devices exist: the system comprises a power supply and distribution management combination and an information processing computer, wherein the power supply and distribution management combination is a remote measuring output interface of the system, and the information processing computer is an information center of the system during formal test of a load system. The power supply and distribution management combination and the temperature controller are normally powered-on equipment, and only the two pieces of equipment are powered on in the rail heat preservation mode; the information processing computer is powered on in the test mode, but the system is designed with a plurality of different test tasks, and other load equipment is powered on in a time-sharing manner according to the different test tasks. The system information interface is schematically shown in fig. 1. In the on-orbit test, a human in-loop control mode exists, and a certain node needs to download execution states of some key actions. The general protocol of the upper-stage equipment restricts the telemetering data transmission to adopt a 500ms period, the effective byte number is not more than 27 bytes, but the system has 12 sets of equipment, a plurality of telemetering data sources and extremely short telemetering bandwidth.
After the telemetering data of the system is transmitted to the upper-level equipment, the upper-level equipment extracts frames from the telemetering data and downloads the telemetering data in a specific working mode, the frame extraction starting and stopping time is not clear, and the frame extraction proportion is 1: 4. the information processing centers of other spacecrafts are also transmission control equipment of the telemetry frames, and the information link state of the system is frequently powered equipment, so that the difficulty is increased for telemetry transmission. Regarding the telemetry format, the PCM format cannot be well adapted to the mode changeful state of the system, the source packet design idea of packet telemetry realizes the dynamic multiplexing of telemetry frames, the telemetry framing problem of complex data sources can be simply solved, but a plurality of auxiliary description data need to be arranged, and the short frame telemetry transmission design is not facilitated. The uniform telemetry format fuses the two data, but the telemetry of the floating zone at least needs two kinds of information of user identification and length to distinguish the telemetry data.
Based on the application background, a telemetry transmission method which can meet the requirements of two information acquisition devices, short telemetry bandwidth resources and complicated and variable telemetry data sources is urgently needed to be designed.
Disclosure of Invention
The invention provides a time-division multiplexing multi-mode telemetering transmission design method, which solves the problems of two information acquisition devices, limited telemetering transmission bandwidth and complicated and changeable telemetering data sources in data downloading.
A time division multiplexing multi-mode telemetry transmission design method comprises the following steps:
grouping possible power-on combinations of the test load multi-mode system in a task period, classifying equipment powered on simultaneously into one group, and corresponding to a telemetering framing mode;
determining the number of cycle repeated frames in each mode as an odd number, screening telemetering data to be transmitted in each mode, screening out data with high importance degree, compressing bytes of the data with high importance degree and then packaging the compressed bytes into cycle telemetering frames, and enabling the number of the frames in the mode to be matched with the number of the telemetering bytes to be transmitted; encapsulating random data downloading requirements during the working period of the system into random telemetry frames one by one;
distinguishing different modes by different data identification codes at fixed positions of the periodic telemetry frames and the random telemetry frames;
the periodic telemetry frames or the random telemetry frames are transmitted according to a telemetry data transmission period.
Further, when a random telemetry frame downloading requirement occurs in the system, suspending periodic telemetry frame downloading, downloading the current telemetry state through the random frame, and continuously transmitting for 4 times; and after the current random frame is downloaded, continuously downloading the periodic telemetry frame.
The invention has the beneficial effects that:
1. the invention combines the characteristics of a multi-mode system, optimally designs the division of labor of two information acquisition centers in the system, multiplexes the multi-mode telemetering format in a time-sharing way, adopts a mode of combining odd frame period telemetering and irregular random frame telemetering, saves the telemetering identification category to the maximum extent, and utilizes limited telemetering resources.
2. The multiframe structure of telemetering data to be transmitted in each mode is an odd number frame, because the telemetering transmission period is fixed, time information is transmitted only once in a group of multiframe structures, and the time of other frames is recurred according to the telemetering frame number, so that the time precision requirement of the system can be met.
3. Under the states of limited remote measurement resources and various system modes, the invention effectively solves the problem of data arrangement and downloading of a remote measurement data source, downloads the key and important remote measurement of the system and meets the remote measurement and monitoring requirements of the system.
Drawings
Fig. 1 is a schematic diagram of a transmission design according to an embodiment of the present invention.
Detailed Description
The time-division multiplexing multimode telemetry transmission design method of the invention is explained in detail below for a certain test load system.
A time-division multiplexing multi-mode telemetering transmission design method is characterized in that information flow directions of two information processing devices in a system are combed. In the standby mode, the telemetering frame can only be processed by the external telemetering interface equipment, and in the test mode, if the frame transmission is directly authorized by the information processing computer, the power supply and distribution management combination needs to return telemetering data of the power supply and distribution management combination and the temperature controller to the information processing computer, so that unnecessary burden is caused to an information link. Therefore, under the test mode, two factors of the telemetering quantity and the change rate are considered, and a certain bandwidth is distributed for each of the two information acquisition devices in one frame without mutual interference.
The possible power-on combinations of the test load multi-mode system in the task period are grouped, the devices which are powered on simultaneously are classified into one group, the groups correspond to a telemetry framing mode, and different modes are distinguished through different data identification codes at fixed positions of telemetry frames. In each frame structure, once the telemetry identification code is determined, the telemetry data of each byte position in the frame is determined, so that length identification is not needed any more, and one type of identification is saved.
The multiframe structure in each telemetry mode is designed to be an odd number of frames. Because the telemetering transmission period is fixed, the time information is transmitted only once in a group of multiframe structures, and the time of other frames is recurred according to the telemetering frame number, so that the time precision requirement of the system can be met.
The telemetering time transmission is optimally designed, time information is transmitted only once in a group of multiframe structures, the time of other frames is recurred according to the telemetering frame number, the time information is transmitted by the power supply and distribution management combination in the standby mode, and the power supply and distribution management combination stops transmission in the working mode and is transmitted to the information processing computer for processing.
When a random downloading requirement occurs in the system, suspending the periodical telemetry frame downloading, downloading the current telemetry state through the random frame, and continuously transmitting for 4 times; and after the current random frame is downloaded, continuously downloading the periodic telemetry frame.
The transmission design method of the present invention is exemplified below.
As shown in fig. 1, firstly, the power-on combination of a certain test load system is grouped, and only two devices, namely a power distribution management combination and a temperature controller, are powered on in a rail heat preservation state, so that a remote measurement mode is designed; in the formal test, besides the power supply and distribution management combination and the power supply of the temperature controller, the other 10 devices have three power-on combination states. Under the on-orbit heat preservation state, a standby telemetering mode is designed, the bandwidth is completely occupied by the power supply and distribution management combination, and the power supply and distribution management combination arranges the telemetering data of the power supply and distribution management combination and the telemetering data of the temperature controller according to a fixed format. In the formal test, the information processing computer is powered on, the power supply and distribution management combination is adjusted from the exclusive telemetry frame to be 1/4 which only occupies the telemetry bandwidth, and the residual bandwidth is used by the information processing computer. Since there are still three different power-on modes for 10 devices such as the information processing computer, the telemetry scheduled by the information processing computer is divided into three modes in order to make the most efficient use of the telemetry bandwidth.
In order to cope with the irregular frame extraction of the upper-level equipment, the telemetry data with odd frame periods form a multi-frame structure in each telemetry mode, and the multi-frame structure has the conditions of 3 frames, 5 frames, 47 frames and the like.
And designing random telemetering frame downloading aiming at random state information of key links of the test load system, such as test preparation results, important instruction response, data storage management and the like. When a random downloading requirement exists, the periodic telemetry frame downloading is suspended, and 4 times of random frame transmission are carried out continuously. And after the random frame is downloaded, continuously downloading the periodic telemetry frame.
The specific telemetering arrangement design is given by taking two modes as an example, wherein the number m, n and p of the multiframe identifications are odd numbers, the number of the multiframes of the power supply and distribution management combination in the mode 2 can not be equal to that of the information processing computer so as to adapt to the updating frequency of different rate variables and slow variables, and the power supply and distribution management combination and the information processing computer have the capability of autonomously switching respective telemetering modes.
Claims (1)
1. A time division multiplexing multi-mode telemetry transmission design method is characterized by comprising the following steps:
grouping possible power-on combinations of the test load multi-mode system in a task period, classifying equipment powered on simultaneously into one group, and corresponding to a telemetering framing mode;
determining that the number of periodic repeating frames in each mode is an odd number, screening telemetering data to be transmitted in each mode, screening out data with high importance degree, compressing bytes of the data with high importance degree and packaging the compressed bytes into periodic telemetering frames; encapsulating random data downloading requirements during the working period of the system into random telemetry frames one by one;
distinguishing different modes by different data identification codes at fixed positions of the periodic telemetry frames and the random telemetry frames;
sending a periodic telemetry frame or a random telemetry frame according to a telemetry data transmission period, which specifically comprises the following steps: when a system has a random telemetry frame downloading requirement, suspending periodic telemetry frame downloading, downloading the current telemetry state through a random frame, and continuously transmitting for 4 times; and after the current random frame is downloaded, continuously downloading the periodic telemetry frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811505430.3A CN109547147B (en) | 2018-12-10 | 2018-12-10 | Time division multiplexing multi-mode telemetering transmission design method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811505430.3A CN109547147B (en) | 2018-12-10 | 2018-12-10 | Time division multiplexing multi-mode telemetering transmission design method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109547147A CN109547147A (en) | 2019-03-29 |
| CN109547147B true CN109547147B (en) | 2020-06-05 |
Family
ID=65854506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811505430.3A Active CN109547147B (en) | 2018-12-10 | 2018-12-10 | Time division multiplexing multi-mode telemetering transmission design method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109547147B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111740806A (en) * | 2020-05-06 | 2020-10-02 | 北京电子工程总体研究所 | Telemetry data framing method and system with self-adaptive variable frame length |
| CN112187411B (en) * | 2020-09-30 | 2021-05-25 | 中国科学院微小卫星创新研究院 | Satellite telemetry data downloading method based on telemetry packet multiplexing |
| CN113193899A (en) * | 2021-03-04 | 2021-07-30 | 上海航天控制技术研究所 | Time division multiplexing satellite telemetry method and apparatus |
| CN113405976B (en) * | 2021-06-07 | 2023-06-02 | 北京轩宇空间科技有限公司 | Main control polling acquisition and transmission method and device for on-orbit irradiation test |
| CN113395176B (en) * | 2021-06-07 | 2022-07-05 | 北京轩宇空间科技有限公司 | Variable bandwidth control method and device for on-track data transmission |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106688332B (en) * | 2013-02-05 | 2015-07-15 | 上海卫星工程研究所 | A kind of satellite telemetry parameters distribution and dispatching method |
| CN105610548A (en) * | 2015-12-28 | 2016-05-25 | 北京卫星制造厂 | Telemetering framing and downloading method based on event-driven |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6804251B1 (en) * | 1998-11-12 | 2004-10-12 | Broadcom Corporation | System and method for multiplexing data from multiple sources |
| CN102081702B (en) * | 2010-12-30 | 2012-11-21 | 哈尔滨工业大学 | Testing task implementing and operating method of testing satellite |
| CN102647791B (en) * | 2011-02-22 | 2015-05-27 | 华为技术有限公司 | Method and device for sending and receiving downlink control message |
-
2018
- 2018-12-10 CN CN201811505430.3A patent/CN109547147B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106688332B (en) * | 2013-02-05 | 2015-07-15 | 上海卫星工程研究所 | A kind of satellite telemetry parameters distribution and dispatching method |
| CN105610548A (en) * | 2015-12-28 | 2016-05-25 | 北京卫星制造厂 | Telemetering framing and downloading method based on event-driven |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109547147A (en) | 2019-03-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109547147B (en) | Time division multiplexing multi-mode telemetering transmission design method | |
| US10880362B2 (en) | Virtual electrical networks | |
| CN109479073A (en) | The adjustment of IOT solution size | |
| JP2019036313A (en) | High performance control server system | |
| CN104239258A (en) | Sensor network using pulse width modulated signals | |
| CN103856241B (en) | A kind of model plane frequency hopping means of communication | |
| CN105610548A (en) | Telemetering framing and downloading method based on event-driven | |
| CN108038933A (en) | A kind of automatic detecting method and apparatus | |
| CN105553486A (en) | Software radio design method on the basis of SCA configuration and integrated service processing platform on the basis of SCA configuration | |
| Wu et al. | Wireless powered mobile edge computing for industrial internet of things systems | |
| CN108029155A (en) | Mesh network node | |
| KR20150119554A (en) | Apparatus and method for application log data processing | |
| Gaitan et al. | A flexible acquisition cycle for incompletely defined fieldbus protocols | |
| CN104703206A (en) | Network protocol performance test bed system for wireless sensor network and testing method | |
| CN116991558B (en) | Computing power resource scheduling method, multi-architecture cluster, device and storage medium | |
| CN106779333A (en) | A kind of intelligent model towards power equipment and its realize system | |
| CN104503885B (en) | A kind of apparatus and system of regularly guarding the gate | |
| CN109639667A (en) | Data acquisition and transmission method, device and equipment based on local data parsing | |
| CN106325242A (en) | MES system based on modularized control units | |
| CN109450763A (en) | A kind of bus expanding method, gateway and extended bus system | |
| CN218103528U (en) | Mining mobile emergency communication system | |
| Capuzzo et al. | An ns-3 implementation of a battery-less node for energy-harvesting internet of things | |
| CN107168166A (en) | A kind of monitoring system and its implementation of electromechanical equipment running status | |
| CN113760814A (en) | Integrated computing system | |
| CN106685927A (en) | Data subframe structure compilation method and relevant device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |