CN1545230A - Time-division networking communication method for implementing flexible and highly effective transmission of airplane flying reference data - Google Patents
Time-division networking communication method for implementing flexible and highly effective transmission of airplane flying reference data Download PDFInfo
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Abstract
The invention discloses a time division networking communication method of implementing flexible and high-efficiency transmission of airplane flying-parameter data, used in a ground-sky wireless flying-parameter data communication system composed of ground transmission station and at least an airborne transmission station. The ground transmission station and all the airborne transmission stations use a wireless channel in common to compose a time division multiaddress communication network, the ground transmission station and the airborne transmission stations compress the flying-parameter data and sends to the time division multiaddress communication network for transmission. According to change of flying training task, it can flexibly allocate the needed time slot to each airplane taking part in training, thus assuring safety and validity of data transmission. In addition, around data transmission, it performs the operations of compression and decompression, enhancing data transmission efficiency and saving precious aviation frequency spectrum resources.
Description
Technical field
The present invention relates to a kind of time-division networking communication method of realizing the flexible and efficient transmission of airplane flying reference data, belong to communication technical field.
Background technology
In the aircraft flying training process, the flight status parameter that obtains aircraft timely and accurately is a crucial job.But be used for the airplane flying reference data Wireless transmission mode at present and but have bigger defective, be mainly reflected in following two aspects.
First is that the time-division group network agreement is dumb, and the training mission difference that can not be born in the flight training process according to aircraft distributes its needed data sending time slots for neatly every airplane of participating in flight training.Such as, the aircraft that carries out the dog fight training flight, the renewal rate of its flight data transmission needs 5Hz, i.e. need 5 time slots to transmit 5 flight datas in the second; Rise, fall or the aircraft of spatial domain training flight, its flight data transmission renewal rate only needs 1Hz or 0.5Hz, only need be with flight data of a time slot transmission in promptly one second or the two seconds kinds.Simultaneously, the data update rate that ground is uploaded to aircraft is generally 0.5Hz, transmits a flight data with a time slot in the promptly two seconds kinds.Therefore, every airplane along with the variation of its training mission, needs to distribute time slot for it neatly in the flight training process.The existing time-division group network agreement that is used for the flight data wireless transmission is every one or several time slot of airplane fixed allocation, can not change flexibly.This fixed allocation mode can not satisfy the needs that Flight Training Mission changes, and may cause time slot waste on the one hand, may can not increase distributed time slot at any time when the needs data updating rate is high again on the other hand, thereby can not satisfy the needs of actual use.
Second is that existing flight data does not carry out the compression and decompression operation to flight data in the process of wireless transmission, wasted valuable frequency spectrum resource.As everyone knows, frequency spectrum resource is very precious, and especially employed radio spectrum resources is precious more in the air communications.For the conserve on spectrum resource, flight data is very necessary the compression before transmission, decompresses the debit after transmission.But up to the present, the flight data data are not still carried out the compression and decompression operation in the process of wireless transmission.On the other hand, existing compression method at voice and view data is existing a lot, for example can be with the speech data of original 16Kbit-64Kbit, needs according to different purposes are compressed to 8Kbit, 4.8Kbit or 2.4Kbit, also can be to about the 30Mbit with the television image data compression of original 200Mbit; Can also will change slower Image Data Compression to 2Mbit, 1Mbit, 384Kbit or 64Kbit.But the characteristic of flight data is different with the characteristic of voice or view data, and its compression and decompression method also has difference.The compression and decompression of flight data can not be copied the method for existing voice or Image Data Compression and decompression mechanically.
Summary of the invention
The object of the present invention is to provide a kind of time-division networking communication method of realizing the flexible and efficient transmission of airplane flying reference data.This method is used among the empty wireless flight data communication system in ground.In this system, adopt our exclusive time-division group network and flight data compression and decompression scheme, can realize flight data flexibly, transmission efficiently.
For realizing above-mentioned goal of the invention, the present invention adopts following technical scheme:
A kind of time-division networking communication method of realizing the flexible and efficient transmission of airplane flying reference data is used among the empty wireless flight data communication system in the ground of being made up of ground transmission station and at least one airborne band to band transfer module; Described ground transmission station is installed on the airport ground, comprise radio station and radio station antenna, communication controler, flight data decompressing device, computer, GPS receiver and gps antenna, described radio station, computer and GPS receiver are connected with described communication controler respectively, and the flight data decompressing device is connected between described communication controler and the described computer; Described airborne band to band transfer module is installed aboard, comprise airborne station and radio station antenna, airborne communication controller, Airborne Flight Parameter data decompression compression apparatus and Airborne GPS receiver and gps antenna, described airborne station, Airborne Flight Parameter data decompression compression apparatus and Airborne GPS receiver are connected with described airborne communication controller respectively, it is characterized in that:
Use a wireless channel to constitute a time division multiple access communication net jointly between described ground transmission station and all the airborne band to band transfer module and between the airborne band to band transfer module;
Described time division multiple access communication Netcom crosses following steps and realizes:
At first be divided into the time frame of loop cycle cycle regular time, utilize the time tag of time frame to produce the interior time lattice of time frame, with continuous when some lattice be spliced into time slot, give ground transmission station with first time slot allocation, remaining time slot is divided into some groups, the number of group is determined according to the needed Gao Gengxin speed of airplane flying reference data transmission transmission, divided group back to give time-gap number in group and the group, it is that the principle that is spacedly distributed is distributed to each airborne band to band transfer module in time frame that the time slot after the numbering is taken time slot according to its that takies two or more time slots.
The time-division networking communication method of the flexible and efficient transmission of realization airplane flying reference data of the present invention is at the actual needs of aviation flight training flight data transmission, can be according to the variation of Flight Training Mission, distribute its needed time slot for neatly every the aircraft of participating in training, promptly distribute its needed flight data transmission renewal rate, so just guaranteed that data transmission safety is effective.In addition, before and after transfer of data, carry out the compression and decompression operation, improved the efficient of transfer of data, saved precious aviation frequency spectrum resources.
Description of drawings
The present invention is further illustrated below in conjunction with the drawings and specific embodiments.
Fig. 1 is the composition structure chart of ground transmission station.
Fig. 2 is the composition structure chart of airborne band to band transfer module.
Fig. 3 is the formation schematic diagram of 2 seconds time frames.
Embodiment
At first the empty wireless flight data communication system in the ground of implementing the method for the invention is made an explanation below.Wireless flight data communication system is made up of the ground transmission station that is installed in airport ground and at least one installation airborne band to band transfer module aboard.
The task of ground transmission station is: ground need be uploaded to the data of aircraft, and such as the command and guide data, the radar intelligence (RADINT) data, meteorological datas etc. send to aircraft, and accept the flight data that all are participated in training and pass under the aircraft.Its composition comprises as shown in Figure 1:
Radio station and radio station antenna: the wireless channel that sends or receive data is provided;
Communication controler: the data processing that realizes sending or receiving data; Realize wireless transmission time-division group network agreement, the control radio station sends or receives according to the networking agreement;
Flight data decompressing device: be the flight data of compression that to receive, be reduced to unpressed flight data;
Computer: the control of realization system, instruction input and system parameters show; Realize man-machine interface;
GPS receiver and gps antenna: the pulse per second (PPS) timing signal that time-division group network is provided to system.
Ground transmission station is core with the communication controler, radio station, computer and GPS receiver are connected with communication controler respectively, the flight data decompressing device is connected between communication controler and the computer, downlink data obtains from the flight data decompressing device, and upstream data then directly enters communication controler.
The task of airborne band to band transfer module is: with the flight data on the aircraft, send to ground and other aircraft such as position data, aspect data, engine data etc., and receive the data of ground transmission station and other airborne band to band transfer module transmission.Its composition as shown in Figure 2, its composition comprises:
Radio station and radio station antenna: the wireless channel that sends or receive data is provided;
Communication controler: the data processing that realizes sending or receiving data; Realize the time-division group network agreement of wireless transmission, the control radio station sends or receives according to the networking agreement.The supporting enforcement of networking agreement and ground transmission station;
Flight data decompressing device: be the flight data of compression that to receive, be reduced to unpressed flight data;
GPS receiver and gps antenna: the pulse per second (PPS) timing signal that time-division group network is provided to system; Provide navigation data to aircraft.
In addition, the communication controler in the airborne band to band transfer module also has the interface of receiving computer instruction.Computer is not installed on the aircraft, and it only uses when aircraft is parked in ground, is connected or separates with communication controler by cable, to realize the setting and the demonstration of system operational parameters.
Airborne band to band transfer module also is core with the communication controler, radio station, flight data decompressing device and GPS receiver are connected with communication controler respectively, enter communication controler behind the flight data process flight data decompressing device, upstream data is directly exported from communication controler.
Between ground transmission station and all the airborne band to band transfer module and airborne band to band transfer module use a wireless channel each other jointly, form a wireless time division multiple access communication net.Be provided with the specific address numbering in the net and broadcast numbering together, available broadcast mode or point to point system carry out data communication, wherein use with broadcasting numbering and can realize broadcast communication, use special address number can realize point to point link.
The purpose of the method for the invention is that communication time slot is distributed to them neatly by ground transmission station and the needed data update rate of airborne band to band transfer module.Need the high several time slots of overabsorption in 2 seconds frames of turnover rate, otherwise distribute several time slots less.Such as, need turnover rate be 5Hz in 2 seconds frames, distribute 10 time slots; 2 time slots of distribution that need 1Hz; 1 time slot of distribution that needs 0.5Hz.
Because being circulation on time shaft, time frame and time slot occur, in the simultaneity factor all, comprise ground transmission station and airborne band to band transfer module, what send in each time slot all is latest data, so each just can obtain different data update rates according to the timeslot number difference that it took in the time frame at 2 seconds.Simultaneously, because the time frame of system and time slot are synchronous operated under GPS pulse per second (PPS) regularly, so each employed different time-gap can aliasing.Like this, whole system has just been formed a time division multiple access net on a wireless channel.Ground transmission station and all airborne band to band transfer module in this net all can be realized data communication each other.
The time slot allocation of above-mentioned ground transmission station is provided with by PC, can send what of data volume according to ground transmission station, the time spent lattice are spliced into different time slot widths, and the big usefulness of data volume lattice more for a long time is spliced into the time slot of broad, otherwise are spliced into narrower time slot with lattice more after a little while.
The time slot allocation of above-mentioned airborne band to band transfer module has dual mode.The one, by the setting of computer; The 2nd, the wireless remote control setting promptly is provided with to airborne band to band transfer module sending controling instruction by ground transmission station.In addition, airborne band to band transfer module also can be as ground transmission station by computer, and according to sending what of data volume, the time spent lattice are spliced into different time slot widths.
The aircraft that generally carries out flight training is according to its Flight Training Mission difference of taking on, and flight data transmission renewal rate needs 5Hz, 1Hz or 0.5Hz respectively; The data that ground is uploaded to aircraft need the renewal rate of 0.5Hz.This just requires their common time frame lengths that uses is the least common multiple of each update cycle, is 2 seconds.
The GPS pulse per second (PPS) be ground transmission station and all airborne band to band transfer module the unified clock source.Whole network the GPS pulse per second (PPS) unified regularly under, utilize ground transmission station to upload address code sign in the data, the frequency divider of airborne communication controller in all airborne band to band transfer module that make zero; Perhaps use the branch clock sign of GPS, the frequency divider of airborne communication controller in communication controler in the ground transmission station that makes zero and the airborne band to band transfer module, produce the time frame of loop cycle, utilize the time tag of time frame to produce time lattice in the time frame, with continuous when some lattice be spliced into time slot.With wireless channel by 2 seconds for unit is divided into time frame, again time frame is divided into lattice when some, with continuous when some lattice be spliced into time slot, so just time frame has been divided into some time slots.Each all utilizes the GPS pulse per second (PPS) regularly, can be formed in be in the whole network synchronous operated time frame, the time lattice and time slot.The formation of 2 seconds time frames as shown in Figure 3, its generation has two kinds of methods.The one, ground transmission station was from arbitrary second, No. 0 time slot that begins second such as n contains the address code name sign of ground transmission station, and makes zero except that 2 frequency dividers with the n pulse per second (PPS) to airborne band to band transfer module emission data in the data, the GPS pulse per second (PPS) just obtains 2 seconds time frames of ground transmission station after removing 2 frequency divisions.Airborne band to band transfer module receives to make zero after the data of ground transmission station and removes 2 frequency dividers, just can obtain the 2 second time frames synchronous with ground transmission station.Another kind method is to utilize GPS to divide 2 frequency dividers that remove of airborne communication controller that the clock sign makes zero ground transmission station communication controler and airborne band to band transfer module.Lattice and time slot when being not difficult to produce by microprocessor have been arranged after 2 seconds time frames.With above thinking and method, can produce the time frame of random length as required.
Among Fig. 3, (a) be the GPS pulse per second (PPS), (b) be time frame, the time lattice and structure of time slot.Lattice Δ t=0.5ms when supposing to get, lattice when frame had 4000 in 2 seconds so.Utilize above-mentioned when removing 2 seconds that 2 frequency dividers produce flag of frame the timer of microprocessor in the communication controler is set, with the clock of the 8KHz clock that is synchronized with the GPS pulse per second (PPS) as timer, so whenever, enter 4 clock cycle of timer, case marker will when timer just produces one, width is 0.5ms.Shi Gejun in ground transmission station and the airborne band to band transfer module time frame produces with this kind method.Many-sided factors such as stability of the data bit number that needed time slot width sends according to a time slot in actual use the, the message transmission rate in radio station, propagation distance time-delay and GPS timing source decide.
In the empty wireless flight data communication system in the ground of implementing the method for the invention, set time slot width Δ T=10ms, frame had 200 time slots in 2 seconds.In general, lattice are spliced into time slot No. 0 during with 1～m, and lattice are spliced into time slot No. 1 during with (m+1)～2m, and lattice are spliced into time slot No. 2 during with (2m+1)～3m ... be spliced into n with (4000-m+1)～4000 o'clock lattice
2Number time slot.M is a positive integer, and its value size is decided according to the width T of required time slot.Among time slot allocation scheme shown in Figure 3, get m=20, lattice are spliced into time slot No. 0 during like this with 1～No. 20, and lattice are spliced into time slot No. 1 during with 21～No. 40, and lattice are spliced into time slot No. 2 during with 41～No. 60 ... lattice are spliced into time slot No. 199 during with 3981～No. 4000.
In order to satisfy the instructions for use of wireless flight data communication system, 200 time slots of 2 seconds frames can be pressed the grouping of method shown in Fig. 3 and the table 1 and use.The concrete grammar of time slot packet numbering is as follows: how many groups 1～n time slot is divided into is decided by needed Gao Gengxin speed of flight data transmission and time slot width, suppose that Gao Gengxin speed is Rmax Hz, time slot width is j second, so time slot is divided into K=Rmax * j group, every group of timeslot number h=n/k, if h is not equal to integer, do so suitably to adjust, make every group of timeslot number equal substantially.In the present embodiment, Rmax=5Hz, j=2 second, n=199, K=5 * 2=10 then, h=199/10=19.9, h are not integer, have been adjusted into 9 groups, every group of 20 time slots have 19 time slots of 1 group.Give time-gap number in group and the group then, the result is as shown in table 1 for the time slot packet numbering.
| Group number | Timeslot number in the group | Timeslot number in the group | | |
| Preceding field | ||||
| 1 | 123456789 10 11 12 13 14 15 16 17 18 19 20 | 20 | Suppose that 2 seconds frames have 0-199 totally 200 time slots.No. 0 time slot uses for earth station.The 1-199 time slot is carried out packet numbering for | |
| 2 | 123456789 10 11 12 13 14 15 16 17 18 19 20 | 20 | ||
| 3 | 123456789 10 11 12 13 14 15 16 17 18 19 20 | 20 | ||
| 4 | 123456789 10 11 12 13 14 15 16 17 18 19 20 | 20 | ||
| 5 | 123456789 10 11 12 13 14 15 16 17 18 19 | 19 | ||
| Back field | 6 | 123456789 10 11 12 13 14 15 16 17 18 19 20 | 20 | |
| 7 | 123456789 10 11 12 13 14 15 16 17 18 19 20 | 20 | ||
| 8 | 123456789 10 11 12 13 14 15 16 17 18 19 20 | 20 | ||
| 9 | 123456789 10 11 12 13 14 15 16 17 18 19 20 | 20 | ||
| 10 | 123456789 10 11 12 13 14 15 16 17 18 19 20 | 20 |
Table 1
The time case marker will of above-mentioned m frequency divider output is counted, and 0 attitude fixed allocation of counter is used to ground transmission station, and like this, the preceding field of 2 seconds frames (last second) has 100 time slots, and No. 0 time slot allocation is used to ground transmission station.If a time slot is not enough, can several time slots be set continuously since No. 0, or the time spent lattice are widened No. 0 time slot.After being provided with continuously or widening, note the variation of follow-up grouping time slot.1～No. 99 time slot is divided into 5 groups, 1,2,3,4 group of each 20 time slot, the 5th group of 19 time slots.The back field of 2 seconds frames (back one second) has 100 time slots and also is divided into 5 groups, every group of 20 time slots, and group number is respectively 6,7,8,9,10.Return ground transmission station uses except that No. 0 time slot in 2 seconds frames, all the other 10 groups totally 199 time slots all return airborne band to band transfer module to use.According to the different numeric state of counter, just can carry out packet numbering to the time slot that is used for airborne band to band transfer module.With group number and timeslot number storage, in use as long as given group number and timeslot number just can find used time slot.
Using method below by packet numbering time slot in the specific embodiment instruction card 1.
Supposing has 16 airplanes in the air, and its numbering is respectively F
1, F
2F
16F
1～F
44 needs renewal rate 5Hz, F
5F
95 need 1Hz, F
10F
167 need 0.5Hz, and time slot allocation result is as shown in table 2.
Table 2
F in the table
1～F
4Respectively account for 10 time slots, turnover rate 5Hz; F
5～F
9Respectively account for 2 time slots, turnover rate 1Hz; F
10～F
16Respectively account for 1 time slot, turnover rate 0.5Hz.Its that takies two or more time slots takies time slot and is spacedly distributed in time frame, and this has just guaranteed the reasonability of renewal rate.
Supposing to have j airplane turnover rate is 5Hz, and k frame turnover rate is 1Hz, and h frame turnover rate is 0.5Hz, the aircraft quantity F=j+k+h that can hold altogether of system then, and 2 seconds frame slot sum n
2For: n
2〉=10j+2k+h+1, wherein adding 1 is because ground transmission station fixedly takies 1 time slot.
For the ease of communicating between ground transmission station and the airborne band to band transfer module, this wireless flight data communication system adopts own exclusive instruction mode and networking agreement.Instruction mode specifies as follows:
(1) 5Hz command word
| H | ?M | ?A | ?B | F n | t n | F n | t n | ????--------- | F n | t n | CRC | ?FEC |
(2) 1Hz command word
| H | ?M | ?A | ?C | F n | T n | t n | F n | T n | ??t n | ??------ | ??F n | T n | ??t n | CRC | ?FEC |
(3) 0.5Hz command word
| H | ?M | ?A | ?D | F n | T n | t n | F n | T n | t n | -------- | F n | T n | t n | CRC | ?FEC |
Command word is described as follows:
H: bit synchronization head;
M: word synchronous head;
A: ground transmission station code name;
F
n: aircraft number, n=1,2,3
T
n: time slot marshalling number, n=1,2,3 ... 10;
t
n: timeslot number in the group, n=1,2,3 ... 20;
The B:5Hz code name;
The C:1Hz code name;
The D:0.5Hz code name;
CRC: data check;
FEC: forward error correction.
An above-mentioned bit synchronization H, word synchronous head M, data check CRC and forward error correction FEC are contents total during general data is communicated by letter, and do not give unnecessary details at this.
Above-mentioned command word to fill in form as follows:
Filling in of 5Hz command word: the Code Number of in the B lattice, inserting expression 5Hz turnover rate.After this, insert the aircraft code name successively, time slot code name, aircraft code name, time slot code name ...
Filling in of 1Hz command word: the Code Number of in the C lattice, inserting expression 1Hz turnover rate.After this, insert the aircraft code name successively, time slot group code name, time slot code name; The aircraft code name, time slot group code name, time slot code name ...
0.5Hz filling in of command word: the Code Number of in the D lattice, inserting expression 0.5Hz turnover rate.After this, insert the aircraft code name successively, time slot grouping code name, time slot code name; The aircraft code name, time slot grouping code name, time slot code name ...
Because the data volume that ground transmission station sends in 0 time slot is certain, so the code data amount that command word can be held is also determined.Whether every kind of command word once can fill up its capacity of determining, or can its capacity of determining once hold the whole code datas that will fill in down, and this depends on the quantity that will change the turnover rate aircraft.Aircraft may be filled out discontented less, and this does not influence the operate as normal of system; How aircraft once can hold any more, can be at twice or repeatedly fill in and send.
After the command word that operating personnel use PC to send fills, give the communication controler of ground transmission station, communication controler adds H, M, CRC and FEC automatically in command word, control the radio station then and send in No. 0 time slot.The procedure stipulation ground transmission station sends a command word, and 5 times promptly 10 seconds is a period, if 5 times receive the receipt signal of all aircrafts that carry out this instruction with interior ground transmission station, stops at any time sending, and all successful execution of this instruction are described.Aerial all the aircraft turnover rates and the time slot operating position registration form of storing in the computer of time update this moment ground transmission station.After this, ground transmission station changes the routine work state automatically over to.If after 5 times, ground transmission station does not also receive all the receipt signals that should carry out this instruction aircraft, and ground transmission station stops to send this instruction.At this moment, can send continuously once more 5 times under operator's intervention, receive the receipt signal of all aircrafts up to ground transmission station, registration form has been revised.If because the deterioration of wireless transmission channel, ground transmission station can not receive the receipt signal that carry out these all aircrafts of instruction in the short time, the operator can store this instruction for the time being, and ground transmission station is rotated back into the routine work state, sends this instruction after a while again.
Airborne band to band transfer module receives command word, at first after position frame synchronization, error correction decoding and CRC check, removes H, M, CRC and FEC, then command word is discerned and is carried out.It is the data that ground transmission station is sent that the different instruction word all identifies from the A lattice.
Identification of 5Hz command word and execution: airborne band to band transfer module knows it is the 5Hz command word by B, by F
nKnow whether it is this aircraft code name, by t
nKnow timeslot number in the group.If F
nIn this machine code name is arranged, just can know that the timeslot number that follows closely behind this aircraft code name is a time slot of distributing to this machine.So the communication controler just time slot that uses of this machine is set to t in every time slot group
nNumber time slot so just took 10 time slots altogether at 2 seconds in the frame, turnover rate is 5Hz.So aircraft sends flight data in newly assigned 10 time slots, comprise the code name F of this aircraft in the data
n
The identification of 1Hz command word and execution: airborne band to band transfer module knows it is the 1Hz command word by C, by F
nKnow whether it is this aircraft code name.If, T following closely
nAnd t
nBe to its distributed time slot group number and timeslot number.So communication controler just is set to T with the time slot that this machine uses
nT
nNumber time slot and T
N ± 5T
nNumber time slot took 2 time slots altogether at 2 seconds like this in the frame, turnover rate is 1Hz.Aircraft sends flight data in newly assigned 2 time slots, comprise the code name F of this aircraft in the data
nT
N ± 5The meaning be: if T
nN≤6 usefulness "+" number, if n 〉=6 usefulness "-" number.T for example
nN=3, t
nN=5, so before field time slot group number T
n=3, group number T during back field
N+5=T
3+5=8, to distribute time slot be No. 5 time slots in 3 groups and 8 groups.Otherwise, if T
nIn n=8, another group number T then
n=T
8-5=3, what still distribute is No. 5 time slots in 3 groups and 8 groups.
0.5Hz the identification of command word and execution: airborne band to band transfer module knows it is the 0.5Hz command word by D, by aircraft code name F
nT following closely
nAnd t
nAs can be known this aircraft institute distributed time slot group number and the group in timeslot number.So communication controler just is set to T with the time slot that this machine uses
nGroup t
nOn the time slot, so took 1 time slot in the frame altogether at 2 seconds, turnover rate is 0.5Hz.So aircraft just sends flight data in newly assigned time slot, comprise the code name F of this aircraft in the data
n
In these three kinds of command words, the aircraft of not inserting its code name is behind reception and recognition instruction, and refusal is carried out.
What ground transmission station knew in advance that it gives that every airplane distributes is those time slot groups and those time slots, when the aircraft correct execution that should execute instruction after the instruction, it just sends flight data on the time slot of the time slot group that is newly assigned to it.Factor according in contain the aircraft code name, correctly carried out instruction so the communication controler of ground transmission station, just can be determined this airplane as long as detect the code name of corresponding aircraft in the time slot in distribution, time slot allocation successfully.
When aircraft rested on ground, available computers was connected with the airborne communication controller of airborne band to band transfer module by cable, distributed time slot to give airborne band to band transfer module.What wired distribution instruction pattern was different with the wireless remote control instruction mode is: to remove synchronous head H in the wireless remote control instruction, and CRC check and FEC error correction coding, all the other are all identical.Computer and airborne communication controller adopt the RS232 asynchronous data interface.The receipt signal is altered time slot group number and a timeslot number on the computer display.
In the networking agreement, to use various code names.To frame structure shown in Figure 3, various code names can provide with 8 binary codes, and these 8 binary codes can provide 256 kinds of different code names, and are as shown in table 3:
| Title | The expression symbol | Code quantity | Remarks |
| The 5Hz code name | ????B | ????1 | Shared 33 code names |
| The 1Hz code name | ????C | ????1 | |
| 0.5Hz code name | ????D | ????1 | |
| The time slot packet number | ????T n’ | ????10 | |
| Timeslot number | ????t n’ | ????20 | |
| Airborne (or aircraft) code name | ????F n | In the individual code name in 223 (256-33), select for use | |
| The earth station code name | ????A |
Table 3
If number of timeslots in the time slot and time slot number of packet change, then Tn ' in the table 3 and tn ' quantity also change.
Except above-mentioned time slot allocation scheme, the present invention also provides the compression and decompression scheme at flight data.Now details are as follows:
Contain 96 bytes in existing every frame flight data, remove 6 bytes of frame head postamble, have 90 bytes.These flight datas can be divided into 3 classes:
1. only need transmit once, perhaps can be from the parameter that obtains in the works;
2. need every frame to transmit, but can compress;
3. need every frame to transmit, cannot compress.
The 1st class data comprise type, plane No., a pressure etc., they can once transmit when transportation protocol is shaken hands and finish, and perhaps obtain from planning data, in case after the success of shaking hands, in data transfer procedure, can no longer transmit these class data, thereby reduce the wireless transmission data amount.
The 2nd class data are maximum class data, and it is the object that this compression scheme is primarily aimed at.These class data mostly are data clocklike, and numerical value change is not too large in adjacent two frames, like this only need to transmit a spot of difference information to ground, carry out decompression operation then on ground, and it is just passable to recover initial data.So just can compress the flight data that need carry out wireless transmission in a large number, play the effect that reduces the wireless network transmissions load.
In wireless transmission, data are easy to be interfered, thereby phenomenons such as frame losing, wrong frame occur.In order to address this problem, the solution that we take is to mend frame.In the detailed process of mending frame, every the regular hour section, transmit the complete initial data of a frame, to proofread and correct the error that increases in time, improve the reliability of data.
In addition, in the wireless transmission process, the data that some can calculate according to other data can be calculated according to gps time as holding time etc.These data can transmit or transmit at interval, thereby further reduce the load of wireless data transmission.
The 3rd class data can be divided into two types, a kind of is the field that is used for unique identification in transmitting, as station designator number, frame identifier etc., they can not be simplified, and can only keep former byte number, and another kind is that some discrete magnitudes are very big, there is not the rule can target-seeking data again, as some switching values on the aircraft, this data also can't be simplified, and can only keep former byte number.
For above-mentioned three class data, the form that can be defined as follows in the process of wireless transmission is discerned:
| A | ??B | ????…………C………… |
Why type above-mentioned A field represents this content frame data, as initial data, partial data and reduced data, just can obtain the data length of this frame accordingly by the A field.The B field is represented this frame number, is used to mend frame, entangles operations such as frame.The C field is represented this content frame.
What need statement is; particular of the present invention is described in detail the present invention; for a person skilled in the art, the various conspicuous change of under the situation that does not deviate from the spirit and scope of the present invention it being carried out is all within protection scope of the present invention.
Claims (8)
1. a time-division networking communication method of realizing the flexible and efficient transmission of airplane flying reference data is used among the empty wireless flight data communication system in the ground of being made up of ground transmission station and at least one airborne band to band transfer module; Described ground transmission station is installed on the airport ground, comprise radio station and radio station antenna, communication controler, flight data decompressing device, computer, GPS receiver and gps antenna, described radio station, computer and GPS receiver are connected with described communication controler respectively, and the flight data decompressing device is connected between described communication controler and the described computer; Described airborne band to band transfer module is installed aboard, comprise airborne station and radio station antenna, airborne communication controller, Airborne Flight Parameter data decompression compression apparatus and Airborne GPS receiver and gps antenna, described airborne station, Airborne Flight Parameter data decompression compression apparatus and Airborne GPS receiver are connected with described airborne communication controller respectively, it is characterized in that:
Use a wireless channel to constitute a time division multiple access communication net jointly between described ground transmission station and all the airborne band to band transfer module and between the airborne band to band transfer module;
Described time division multiple access communication Netcom crosses following steps and realizes:
At first be divided into the time frame of loop cycle cycle regular time, utilize the time tag of time frame to produce the interior time lattice of time frame, with continuous when some lattice be spliced into time slot, give ground transmission station with first time slot allocation, remaining time slot is divided into some groups, the number of group is determined according to the needed Gao Gengxin speed of airplane flying reference data transmission transmission, divided group back to give time-gap number in group and the group, it is that the principle that is spacedly distributed is distributed to each airborne band to band transfer module in time frame that the time slot after the numbering is taken time slot according to its that takies two or more time slots.
2. the time-division networking communication method of the flexible and efficient transmission of realization airplane flying reference data as claimed in claim 1 is characterized in that:
Sending into described time division multiple access communication net again after described ground transmission station and airborne band to band transfer module compress flight data transmits.
3. the time-division networking communication method of the flexible and efficient transmission of realization airplane flying reference data as claimed in claim 1 is characterized in that:
Described first time slot of distributing to ground transmission station can the mode of lattice be widened when increasing.
4. the time-division networking communication method of the flexible and efficient transmission of realization airplane flying reference data as claimed in claim 1 is characterized in that:
Described ground transmission station and each described airborne band to band transfer module utilize the GPS pulse per second (PPS) regularly.
5. the time-division networking communication method of the flexible and efficient transmission of realization airplane flying reference data as claimed in claim 1 is characterized in that:
The time frame of described loop cycle produces as follows:
Ground transmission station is launched data from first time slot of beginning in arbitrary second to airborne band to band transfer module, the address code name sign that contains ground transmission station in the data, and make zero with this pulse per second (PPS) and to remove 2 frequency dividers, the GPS pulse per second (PPS) just obtains the time frame of ground transmission station through except that behind 2 frequency divisions.Airborne band to band transfer module receives to make zero after the data of ground transmission station and removes 2 frequency dividers, just can obtain the time frame synchronous with ground transmission station.
6. the time-division networking communication method of the flexible and efficient transmission of realization airplane flying reference data as claimed in claim 1 is characterized in that:
The time frame of described loop cycle utilizes GPS to divide 2 frequency dividers that remove of the airborne communication controller that the clock sign makes zero ground transmission station communication controler and airborne band to band transfer module to produce.
7. the time-division networking communication method of the flexible and efficient transmission of realization airplane flying reference data as claimed in claim 1 is characterized in that:
Described ground transmission station and described airborne band to band transfer module carry out in the process of radio communication, every the regular hour section, transmit the complete initial data of a frame.
8. the time-division networking communication method of the flexible and efficient transmission of realization airplane flying reference data as claimed in claim 1 is characterized in that:
Be provided with the specific address numbering in the described time division multiple access communication net and broadcast numbering together, use with broadcasting numbering and can realize broadcast communication, use special address number can realize point to point link.
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| CNB2003101153754A CN100373830C (en) | 2003-11-20 | 2003-11-20 | Time-division networking communication method for implementing flexible and highly effective transmission of airplane flying reference data |
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| CNB2003101153754A CN100373830C (en) | 2003-11-20 | 2003-11-20 | Time-division networking communication method for implementing flexible and highly effective transmission of airplane flying reference data |
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| CN100373830C CN100373830C (en) | 2008-03-05 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100448326C (en) * | 2006-11-09 | 2008-12-31 | 北京航空航天大学 | Airport scene monitoring method |
| CN101379770B (en) * | 2006-07-04 | 2011-12-07 | 松下电器产业株式会社 | Radio communication system |
| CN103176457A (en) * | 2013-02-26 | 2013-06-26 | 北京东进记录科技有限公司 | Automatic aircraft position monitoring system, position reporting device and ground monitoring device |
| CN104507179A (en) * | 2014-12-08 | 2015-04-08 | 中国运载火箭技术研究院 | Network communication architecture applied to networking information transmission system and communication method |
| CN105100116A (en) * | 2015-08-31 | 2015-11-25 | 云南电网有限责任公司电力科学研究院 | Efficient and safe power data interaction method in wireless communication mode |
| CN108337067A (en) * | 2018-01-16 | 2018-07-27 | 成都福兰特电子技术股份有限公司 | A kind of control method of Multifunctional navigation communication and navigation identifying system |
| CN108880724A (en) * | 2018-04-18 | 2018-11-23 | 广州市中海达测绘仪器有限公司 | Airborne equipment data transmission method, apparatus and system based on time sharing transmissions technology |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08251096A (en) * | 1995-03-11 | 1996-09-27 | Nec Corp | Slot allocation system |
| US5841777A (en) * | 1996-08-30 | 1998-11-24 | Hewlett-Packard Company | System and method for accommodating ABR and CBR traffic on a shared communications channel |
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2003
- 2003-11-20 CN CNB2003101153754A patent/CN100373830C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101379770B (en) * | 2006-07-04 | 2011-12-07 | 松下电器产业株式会社 | Radio communication system |
| CN100448326C (en) * | 2006-11-09 | 2008-12-31 | 北京航空航天大学 | Airport scene monitoring method |
| CN103176457A (en) * | 2013-02-26 | 2013-06-26 | 北京东进记录科技有限公司 | Automatic aircraft position monitoring system, position reporting device and ground monitoring device |
| CN104507179A (en) * | 2014-12-08 | 2015-04-08 | 中国运载火箭技术研究院 | Network communication architecture applied to networking information transmission system and communication method |
| CN104507179B (en) * | 2014-12-08 | 2018-03-09 | 中国运载火箭技术研究院 | A kind of network communication architectures and communication means applied to mesh information Transmission system |
| CN105100116A (en) * | 2015-08-31 | 2015-11-25 | 云南电网有限责任公司电力科学研究院 | Efficient and safe power data interaction method in wireless communication mode |
| CN108337067A (en) * | 2018-01-16 | 2018-07-27 | 成都福兰特电子技术股份有限公司 | A kind of control method of Multifunctional navigation communication and navigation identifying system |
| CN108880724A (en) * | 2018-04-18 | 2018-11-23 | 广州市中海达测绘仪器有限公司 | Airborne equipment data transmission method, apparatus and system based on time sharing transmissions technology |
| CN108880724B (en) * | 2018-04-18 | 2021-04-27 | 广州市中海达测绘仪器有限公司 | Airborne equipment data transmission method, device and system based on time-sharing transmission technology |
Also Published As
| Publication number | Publication date |
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| CN100373830C (en) | 2008-03-05 |
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