CN105471660A - Data acquisition method applicable to new type low orbit satellite platform - Google Patents
Data acquisition method applicable to new type low orbit satellite platform Download PDFInfo
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- CN105471660A CN105471660A CN201511001004.2A CN201511001004A CN105471660A CN 105471660 A CN105471660 A CN 105471660A CN 201511001004 A CN201511001004 A CN 201511001004A CN 105471660 A CN105471660 A CN 105471660A
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- acquisition
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- transmission request
- remote terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/08—Configuration management of networks or network elements
- H04L41/0803—Configuration setting
- H04L41/0806—Configuration setting for initial configuration or provisioning, e.g. plug-and-play
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18513—Transmission in a satellite or space-based system
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40006—Architecture of a communication node
- H04L12/40013—Details regarding a bus controller
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/08—Configuration management of networks or network elements
- H04L41/0803—Configuration setting
- H04L41/0813—Configuration setting characterised by the conditions triggering a change of settings
- H04L41/0816—Configuration setting characterised by the conditions triggering a change of settings the condition being an adaptation, e.g. in response to network events
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/08—Configuration management of networks or network elements
- H04L41/0803—Configuration setting
- H04L41/0823—Configuration setting characterised by the purposes of a change of settings, e.g. optimising configuration for enhancing reliability
- H04L41/083—Configuration setting characterised by the purposes of a change of settings, e.g. optimising configuration for enhancing reliability for increasing network speed
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/08—Configuration management of networks or network elements
- H04L41/0866—Checking the configuration
- H04L41/0869—Validating the configuration within one network element
Abstract
The invention discloses a data acquisition method applicable to a new type low orbit satellite platform. The method is based on a 1553B bus and searches a data transmission request sent by a remote terminal through a bus controller so as to finish the data acquisition function. Firstly, a remote control terminal finishes preparing the data needed to be sent and sends the data transmission request to the bus controller; then the bus controller searches the transmission request of the remote terminal and takes away corresponding data from the remote terminal according to the request content, finally, the bus controller sends data transmission finish confirmation to the remote terminal. The method of the invention ensures that the data transmitted by the remote terminal is complete, prevents telemeasuring data errors resulted from not updating the data timely, and simultaneously improves the utilization rate of the bandwidth usage efficiency of the bus.
Description
Technical field
The invention belongs to aerospace electron technical field, relate to a kind of data capture method being applicable to novel low orbit satellite platform.
Background technology
In low orbit satellite platform in orbit process, the telemetry parameter that satellite passes down mainly contains each several part temperature, voltage, electric current, pressure, state, count value etc., and these telemetry parameters are main paties that current people monitor spacecraft component operating state.So data capture method be low orbit satellite platform in orbit in Core Feature.
Low orbit satellite platform telemetry data are the initial data of the unprocessed mistake represented in binary form, i.e. remote measurement source code.The method that current telemetry obtains is that bus control unit periodically directly asks for the telemetry be stored in respective cache district, and does not confirm whether the data in buffer area have upgraded complete.Meanwhile, remote terminal is only responsible for passive renewal telemetry, and when uncontrollable telemetry is asked for.So just cause opened loop control, telemetry may be caused to upgrade not in time, telemetry mistake.
Summary of the invention
The technical problem that the present invention solves is: overcome the deficiencies in the prior art, a kind of data capture method being applicable to novel low orbit satellite platform is provided, solves telemetry and control open loop, the inaccurate problem of data acquisition, meanwhile, improve the utilance of bus control unit and bus bandwidth.
Technical scheme of the present invention is: a kind of data capture method being applicable to novel low orbit satellite platform, and step is as follows:
1) in data acquisition, bus control unit is configured
11) bus control unit is the acquisition block count that each remote terminal creates a up-to-date acquisition data block received;
12) when bus control unit resets or when restarting, for the acquisition block count of all remote terminals sets to 0, and send data acquisition service reset request to each remote terminal;
2) in data acquisition, remote terminal is configured
21), when the first usage data of remote terminal obtains service, reseting data Bulk transport service request is sent to bus control unit; The acquisition that described reseting data Bulk transport service request is 1 by reset flag is transmitted request and is formed;
22) when the request inquiring remote terminal, the request of remote terminal is kept;
3) when resetting appears in remote terminal, or acquisition block counting values in the acquisition acknowledge received with current obtains transmit ask in acquisition block counting values identical, generation acquisition is transmitted and is asked; Remote terminal, before transmission obtains transmission request to bus control unit, upgrades it and obtains transmission request;
4) remote terminal complete to obtain transmit relevant data buffer zone renewal after, send obtain transmission request to bus control unit; Bus control unit judges the reset flag in the acquisition transmission request received, when reset flag is 0, bus control unit is by comparing the acquisition block counting values and the step 11 that obtain in transmission request) the acquisition block counting values that creates of middle bus control unit, identify new acquisition transmission request, if be new acquisition transmission request, then obtain the data in remote terminal data buffer zone, and send acquisition acknowledge to remote terminal, obtain transmission request if not new then ignoring; If reset flag is 1, then the reset flag of the acquisition acknowledge of bus control unit also marks 1, shows that bus control unit end executed agreement resets.
5) remote terminal inspection obtains acknowledge, judges, determined whether transmission, exited this method the reset flag obtained in acknowledge, acquisition block count and error flag.
Described acquisition acknowledge comprises current data block byte number, error flag, reset flag, pattern, subaddressing and acquisition block count; Described acquisition transmission request comprises current data block byte number, service quality, reset flag, pattern, subaddressing and acquisition block count.
Step 4) in compare the acquisition block counting values and the step 11 that obtain in transmission request) in the acquisition block counting values that creates of bus control unit, identify that new acquisition is transmitted the concrete grammar of asking and is:
If two values are different:
when bus control unit end acquisition transmission request in mode flag be 0 and the value of data block byte number in 1 ~ 1024, then according to subaddressing definition obtain data block; Described pattern is defined as: " 0 " represents that transfer of data is carried out in the multiple subaddressing of use; " 1 " represents that transfer of data is carried out in the single subaddressing of use;
mode flag in the acquisition transmission request of bus control unit end is 0 and the value of data block byte number is greater than 1024, then ignore and obtain transmission request;
mode flag in the acquisition transmission request of bus control unit end is 1, then obtain data block according to the subaddressing of specifying;
If two values are identical, then ignore and obtain transmission request.
Step 5) in check that obtaining the concrete grammar of acknowledge is:
51) if the reset flag obtained in acknowledge is 1, then agreement resets and completes, and shows that this is transmitted, exits this method; If the reset flag in acquisition acknowledge is 0, enter step 52);
52) if the quality-of-service indicia obtained in transmission request is 0, and obtain acquisition block count in acknowledge and obtain that to transmit the acquisition block count in asking identical with current, show that this is transmitted, exit this method;
53) if the quality-of-service indicia obtained in transmission request is 1, and obtain error flag in acknowledge to be 0, to obtain acquisition block count in acknowledge and obtain that to transmit the acquisition block count in asking identical with current, show that this is transmitted, exit this method;
54) if the quality-of-service indicia obtained in transmission request is 1, and obtain error flag in acknowledge to be 1, to obtain acquisition block count in acknowledge and obtain that to transmit the acquisition block count in asking identical with current, show this bust this, exit this method.
The present invention's advantage is compared with prior art: the inventive method is in data acquisition transmitting procedure, specific definition has been made to the transmission configuration of bus control unit and remote terminal, and by obtaining the data transmission method achieving two kinds of communication patterns and reset that transmission is asked and obtained the concrete definition of acknowledge content and the concrete using method of every content.The method increase the transmission speed of the several data in data acquisition, improve the utilance of traffic data bandwidth.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that forms data obtains transmission.
Fig. 2 is most high efficiency of transmission sequential chart.
Fig. 3 is for confirming length transmission sequential chart.
Embodiment
Remote terminal sends data to bus control unit and is referred to as data acquisition transmission.This process is realized by acquisition transmission request (ATR) of inquiry remote terminal.
The user of remote terminal shows that new data has been ready to and has started to bus control unit transmission data.The user of bus control unit end reads the data acquisition transmission request of this new data arrival, and starts to send buffers from remote terminal at next communication frame.The method was only supported once to obtain transmission from each remote terminal in preset time, and repeatedly obtaining transmission data if having needs to send, then the acquisition data block that remote terminal application program tackles buffering area therein sorts.
According to the request of remote terminal, whether bus control unit Application inspection data are complete and correct, and return acquisition acknowledge (ATC), show that data are transmitted.If the user of remote terminal asks a transfer check, so this acquisition acknowledge should show that whether transmission is successful, and the application program of remote terminal still transmits same data again according to the transmission data whether successfully decision transmission one is new.
Only after receiving new acquisition acknowledge, remote terminal is just allowed to propose next acquisition transmission request.
As shown in Figure 1, the schematic process that forms data obtains transmission is described in detail.Fig. 2 is the most efficient sequential chart, space on time shaft expresses possibility and there will be the extra delay of one or several communication frame, this depends on arrangement and the remote terminal application sequential of selected bus, if there is no interval, so agreement can the 3rd frame after transferring a data block start on once transmit.Fig. 3 is the sequential chart judging length service quality: if when not having a space to single remote terminal, just can there is a data block in every five communication frames.
Below the inventive method is described in detail:
1) processing configuration of BC (bus control unit) in data acquisition
Data acquisition transmits inquires about remote terminal acquisition transmission request by bus control unit, and valid data and transmission obtain acknowledge and form.
Bus control unit is that each uses the remote terminal of the method to safeguard the acquisition block count of a up-to-date acquisition data block received.
When bus control unit resets or when restarting, the acquisition block count safeguarded for all remote terminals sets to 0, and terminal configuration order is used to send data acquisition service reset request to each remote terminal.
2) in data acquisition, RT (remote terminal) is configured
The first usage data of remote terminal obtains when serving or the time of needs, reseting data Bulk transport service request should be sent, the acquisition that reseting data Bulk transport service request is 1 by reset flag is transmitted request and is formed (this requirement is intended to guarantee that the initial conditions determined and one know condition, such as, because terminal reshuffles restarting of causing);
When the request inquiring remote terminal, the request of remote terminal should keep, and keeps meaning: two words belonging to same request, and remote terminal is used as two words as an independent entity; Actual obtain transmission for transparent remote terminal, such as, do not ensure to obtain certain data block immediately after placement one obtains transmission request, but a specific transmission, rear remote terminal occurs and can have notice.
3) only when there is following situation, remote terminal can produce an acquisition transmission request: a) agreement resets; When the acquisition block count in the acquisition acknowledge b) received and identical in current transmission request.
Before transmission obtains transmission request to bus control unit, remote terminal should mark according to mode and transmit relevant data buffer zone according to corresponding form renewal to acquisition;
Before transmission obtains transmission request to bus control unit, remote terminal needs to upgrade it and obtains transmission request;
Obtain transmission request format as follows:
Each several part is defined as follows:
A) position is retained: be set to full 0;
B) current data block byte number: this data field represents the byte number obtaining data block; Full null representation 4096 byte, for representing low byte bag byte of padding of the last character of the last item message during odd number, this byte of padding is produced by transmitting terminal when being 1553B message by user data cutting, and this byte of padding can be any number; If reset flag is 1, then this data field is 0;
C) service quality: " 0 " represents that obtaining data block adopts the transmission of most High-effective Service; " 1 " represents that obtaining data block adopts the transmission of confirmation length wise; If reset flag is 1, then this data field is 0;
D) reset flag: " 0 " presentation protocol runs; " 1 " presentation protocol reset request or RT reset;
E) pattern: " 0 " represents that transfer of data is carried out in the multiple subaddressing of use; " 1 " represents that transfer of data is carried out in the single subaddressing of use; If reset flag is 1, then this data field is 0;
F) subaddressing: if when mode flag is " 1 ", this data field represents the subaddressing that will write data; If when mode flag is " 0 ", this data field fills out " 01011 " namely 11.In platform, transmission of data blocks service uses the address mode of tiling;
G) block count is obtained: this data field is the counting of one 8 circulations, identifies current data block; If reset flag is 1, then this data field is 0; After agreement resets, during first time transfer of data, this data field fills out 1; To the new transmission that each will perform, obtaining block count should add 1, until after obtaining block count to 255, the next one is counted as 1;
4) remote terminal complete to obtain transmit relevant data buffer zone renewal after, send obtain transmission request to bus control unit; Bus control unit judges the reset flag in the acquisition transmission request received.
If reset flag is 0, by the acquisition block counting values comparing acquisition block counting values and storage, bus control unit identifies that new acquisition is transmitted and asks, and rule is as follows:
(1) if two values are different:
when bus control unit end acquisition transmission request in mode flag be 0 and the value in data block length territory in 1 ~ 1024, then according to the address acquisition data block of specifying;
mode flag in the acquisition transmission request of bus control unit end is 0 and the value in data block length territory is greater than 1024, then ignore this request;
mode flag in the acquisition transmission request of bus control unit end is 1, then according to the address acquisition data block of specifying.
(2) if two values are identical, this request (without new data) is ignored.
If reset flag is 1, then the reset flag of the acquisition acknowledge of bus control unit should be also 1, shows that bus control unit end executed agreement resets, and second communication frame after the communication frame obtaining transmission place sends and obtain acknowledge.
If when service quality is 0 or 1, when having obtained data without any error of transmission, BC should:
● transfer data to BC and hold service-user, and remove all fillings oneself;
● use the acquisition counting that the acquisition data count update received stores;
● transmission upgrades acquisition block count, error flag is that the acquisition acknowledge of 0 is to RT;
● if service quality is 0, is obtaining the communication frame transmission acquisition acknowledge performing place;
● if service quality is 1, then after obtaining the communication frame performing place, second communication frame sends and obtain acknowledge.
If service quality is 1 and obtain data when having an error of transmission, BC should:
● use the acquisition block count that the acquisition data count update received stores;
● send the acquisition acknowledge that renewal obtains block count, error flag is 1 and hold to RT.
● second communication frame after the communication frame obtaining transmission place sends and obtains acknowledge.
Obtain acknowledge form as follows:
Each several part is defined as follows:
A) position is retained: be set to full 0;
B) current data block byte number: this data field be from remote terminal reception to acquisition transmission request the copy in corresponding data territory;
C) error flag: " 0 " represents that inerrancy occurs; " 1 " expression receives byte number mistake; After agreement resets, this territory is set to 0;
D) reset flag: " 0 " presentation protocol runs; " 1 " presentation protocol reset request is permitted;
E) pattern: this data field be from remote terminal reception to acquisition transmission request the copy in corresponding data territory;
F) subaddressing: this data field be from remote terminal reception to acquisition transmission request the copy in corresponding data territory;
G) obtain block count: this data field be from remote terminal reception to acquisition transmission request the copy in corresponding data territory.
5) when appearance transmission request or agreement reset request, remote terminal should check and obtains acknowledge and perform following operation after each communication frame synchronization message:
● if the reset flag obtained in acknowledge is 1, then notify that the service-user agreement of remote terminal resets and complete.
● the quality-of-service indicia obtained in transmission request is 0, and obtains acquisition block count in acknowledge and obtain that to transmit the acquisition block count in asking not identical with current, then transmit and do not complete.
● the quality-of-service indicia obtained in transmission request is 0, and obtains acquisition block count in acknowledge and obtain that to transmit the acquisition block count in asking identical with current, be then transmitted.
● the quality-of-service indicia obtained in transmission request is 1, and obtains error flag in acknowledge and be 0, obtain acquisition block count in acknowledge and obtain that to transmit the acquisition block count in asking identical with current, then transmission success;
● the quality-of-service indicia obtained in transmission request is 1, and obtains error flag in acknowledge and be 1, obtain acquisition block count in acknowledge and obtain that to transmit the acquisition block count in asking identical with current, then unsuccessful transmission.
Claims (4)
1. be applicable to a data capture method for novel low orbit satellite platform, it is characterized in that step is as follows:
1) in data acquisition, bus control unit is configured
11) bus control unit is the acquisition block count that each remote terminal creates a up-to-date acquisition data block received;
12) when bus control unit resets or when restarting, for the acquisition block count of all remote terminals sets to 0, and send data acquisition service reset request to each remote terminal;
2) in data acquisition, remote terminal is configured
21), when the first usage data of remote terminal obtains service, reseting data Bulk transport service request is sent to bus control unit; The acquisition that described reseting data Bulk transport service request is 1 by reset flag is transmitted request and is formed;
22) when the request inquiring remote terminal, the request of remote terminal is kept;
3) when resetting appears in remote terminal, or acquisition block counting values in the acquisition acknowledge received with current obtains transmit ask in acquisition block counting values identical, generation acquisition is transmitted and is asked; Remote terminal, before transmission obtains transmission request to bus control unit, upgrades it and obtains transmission request;
4) remote terminal complete to obtain transmit relevant data buffer zone renewal after, send obtain transmission request to bus control unit; Bus control unit judges the reset flag in the acquisition transmission request received, when reset flag is 0, bus control unit is by comparing the acquisition block counting values and the step 11 that obtain in transmission request) the acquisition block counting values that creates of middle bus control unit, identify new acquisition transmission request, if be new acquisition transmission request, then obtain the data in remote terminal data buffer zone, and send acquisition acknowledge to remote terminal, obtain transmission request if not new then ignoring; If reset flag is 1, then the reset flag of the acquisition acknowledge of bus control unit also marks 1, shows that bus control unit end executed agreement resets.
5) remote terminal inspection obtains acknowledge, judges, determined whether transmission, exited this method the reset flag obtained in acknowledge, acquisition block count and error flag.
2. a kind of data capture method being applicable to novel low orbit satellite platform according to claim 1, is characterized in that: described acquisition acknowledge comprises current data block byte number, error flag, reset flag, pattern, subaddressing and acquisition block count; Described acquisition transmission request comprises current data block byte number, service quality, reset flag, pattern, subaddressing and acquisition block count.
3. a kind of data capture method being applicable to novel low orbit satellite platform according to claim 2, it is characterized in that: step 4) in compare the acquisition block counting values and the step 11 that obtain in transmission request) in the acquisition block counting values that creates of bus control unit, identify that new acquisition is transmitted the concrete grammar of asking and is:
If two values are different:
when bus control unit end acquisition transmission request in mode flag be 0 and the value of data block byte number in 1 ~ 1024, then according to subaddressing definition obtain data block; Described pattern is defined as: " 0 " represents that transfer of data is carried out in the multiple subaddressing of use; " 1 " represents that transfer of data is carried out in the single subaddressing of use;
mode flag in the acquisition transmission request of bus control unit end is 0 and the value of data block byte number is greater than 1024, then ignore and obtain transmission request;
mode flag in the acquisition transmission request of bus control unit end is 1, then obtain data block according to the subaddressing of specifying;
If two values are identical, then ignore and obtain transmission request.
4. a kind of data capture method being applicable to novel low orbit satellite platform according to claim 2, is characterized in that: step 5) in check that obtaining the concrete grammar of acknowledge is:
51) if the reset flag obtained in acknowledge is 1, then agreement resets and completes, and shows that this is transmitted, exits this method; If the reset flag in acquisition acknowledge is 0, enter step 52);
52) if the quality-of-service indicia obtained in transmission request is 0, and obtain acquisition block count in acknowledge and obtain that to transmit the acquisition block count in asking identical with current, show that this is transmitted, exit this method;
53) if the quality-of-service indicia obtained in transmission request is 1, and obtain error flag in acknowledge to be 0, to obtain acquisition block count in acknowledge and obtain that to transmit the acquisition block count in asking identical with current, show that this is transmitted, exit this method;
54) if the quality-of-service indicia obtained in transmission request is 1, and obtain error flag in acknowledge to be 1, to obtain acquisition block count in acknowledge and obtain that to transmit the acquisition block count in asking identical with current, show this bust this, exit this method.
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| Publication number | Publication date |
|---|---|
| CN105471660B (en) | 2018-10-09 |
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