CN101662323B - Multi-user conflict processing method for maritime personal emergency position indicating system - Google Patents
Multi-user conflict processing method for maritime personal emergency position indicating system Download PDFInfo
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- CN101662323B CN101662323B CN 200810042243 CN200810042243A CN101662323B CN 101662323 B CN101662323 B CN 101662323B CN 200810042243 CN200810042243 CN 200810042243 CN 200810042243 A CN200810042243 A CN 200810042243A CN 101662323 B CN101662323 B CN 101662323B
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- 238000003672 processing method Methods 0.000 title claims abstract description 7
- 238000005259 measurement Methods 0.000 claims description 20
- 206010013647 Drowning Diseases 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 8
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Abstract
The invention relates to maritime alarm equipment for personal use, and provides a multi-user conflict processing method for a maritime personal emergency position indicating system, which can solve the technical problem of multi-user conflict and ensure that a plurality of beacon sets can be searched and displayed one by one by a search machine when operating simultaneously. The search machine sends a query signal; after receiving the query signal, the beacon sets carried by people falling in water send a radio beacon signal; and the search machine receives the beacon signal and measures the azimuth and distance of each beacon. The multi-user conflict processing method is characterized in that the search machine realizes conflict-free simultaneous positioning on n beacon sets in a time division multiple access mode. The method provide by the invention can realize the simultaneous and conflict-free positioning of one search machine on infinite beacon sets. Rescuers determine the positions of the people falling in the water quickly through the azimuth and distance of the beacon signal measured by the search machine so as to improve the success rate of rescue greatly, and speed up the rescue process.
Description
Technical field:
The present invention relates to the sea calling for help equipment that the individual uses.
Background technology:
According to International Maritime Organization and China marine board pertinent regulations, the communication rescue aids such as VHF radio station, maritime affairs radio telephone, GPS navigation system and satellite ship station are installed mostly on the seagoing vessel.When accident occured, ship can be cried for help to search and rescue department by these equipment.But the crewman under the effect of current, will float from accidental site after falling into water.The crewman is substantially without personal communication or show an equipment owing to fall into water, therefore when the rescue personnel arrives in accidental site can very fast discovery wrack, but be difficult to definite drowning crewman's concrete orientation.At present, domestic there is no for individual's sea called for help equipment, and external similar products only can be realized identification and the location to unique user; And the seagoing vessel accident has several people usually or tens of people falls into water, the location when method that there is no in the prior art realizes many people.
Summary of the invention:
Technical problem to be solved by this invention is to use simultaneously for many Radio Beacon to have conflict and interference, the problem that search engine can't position, the multi-user conflict processing method of a kind of maritime personal emergency position indicating system that proposes, can solve the multi-user conflict problem, in the time of can guaranteeing that a plurality of Radio Beacon are worked simultaneously, can searched machine search for one by one and show.
For solving the problems of the technologies described above, the present invention proposes following technical scheme to realize:
The multi-user conflict processing method of maritime personal emergency position indicating system, it adopts ship/aircraft to carry search engine and portable personal Radio Beacon two parts form maritime personal emergency position indicating system; Search engine is installed in searches and rescues on helicopter and the search and rescue ship, and Radio Beacon is carried by the crewman; Search engine sends request signal, after the Radio Beacon that the drowning people carries is received request signal, sends the radio beacon signal, and search engine receives beacon signal and measures the azimuth-range of Radio Beacon, it is characterized in that:
Described search engine adopts the mode of time division multiple access to realize conflict free simultaneously location to n Radio Beacon; Search engine sends request signal at the inquiry time slot, in the acknowledge cycle, after search engine sends request signal, n Radio Beacon according to the request signal of receiving follow inquiring time slot after 0～n-1 angle measurement time slot send respectively beacon signal; Reserve the protection interval between each time slot;
Wherein, the request signal frame comprises following data:
The demodulation synchrodata; The data-frame sync data; Mode of operation; Current search machine sign is for numbering, the time slot operating position of sign search engine; Be used for identifying time slot and the untapped time slot of current use; The priority access system sign is for the Radio Beacon label of sign priority access; Check word; Other keeps data, is used for doing system extension;
The beacon signal frame comprises following data:
The demodulation synchrodata; The data-frame sync data; Be used for carrying out the data of angular surveying; The sign of Radio Beacon is for the numbering of sign Radio Beacon; The current search engine that accesses of Radio Beacon; The GPS latitude and longitude information is used for the GPS latitude and longitude information that the sign Radio Beacon receives; The tail number sign of Radio Beacon; Reserve bytes is used for doing system extension; Check byte;
Described search engine takes following steps that n Radio Beacon realized time slot allocation:
Step 1: initialization: the search engine start that powers on, under this pattern, in the search engine request signal, mode of operation sign, priority access system banner and time slot operating position are for all being initialized as 0;
Step 2: start-up mode: after search engine sent request signal, search engine was monitored the Radio Beacon signal continuously on 0～n-1 the angle measurement time slot of an acknowledge cycle;
Does step 3: search engine listen to the Radio Beacon signal on the angle measurement time slot? have, then turn step 4; Nothing then turns step 2;
Does step 4: search engine judge that the tail number sign of the beacon signal that listens to shows to only have a Radio Beacon? then to enter the affirmation pattern of step 5; No, then search engine enters the contrary sign conflict mode of step 6;
Step 5: affirmation mode: search engine sends request signal; In the request signal, mode of operation is designated affirmation mode, the label of the Radio Beacon that receives on the record m angle measurement time slot in the priority access system sign and the access slot of this Radio Beacon are the priority access time slot, indicate in the time slot operating position and use and untapped time slot, 0≤m≤n-1; Described priority access time slot is first free timeslot that uses behind the time slot; Radio Beacon judges according to the request signal of search engine whether the priority access system sign in this request signal is the label of oneself; If so, then send the Radio Beacon signal at the priority access time slot; If not, the next time slot that open behind the priority access time slot in the time slot sky of having used of then indicating in the operating position of crack in use sends beacon signal; Turn step 7;
Step 6: contrary sign conflict mode: search engine sends new request signal, and in the request signal, mode of operation is designated the contrary sign conflict mode; Be marked with in the priority access system sign: the tail number of the Radio Beacon of priority access be m, m+1 ..., m+p; And corresponding access slot i, i+1 ..., i+p; P is the Radio Beacon number that the tail number sign of the beacon signal that listens to of search engine shows; Indicate in the time slot operating position and take and unappropriated time slot; After sending request signal, after fixedly the Radio Beacon of time slot receives the request signal of contrary sign conflict mode, whether the tail number of oneself is arranged in the contrast priority access system sign, have then to send answer signal by its corresponding access slot; No, then after taking time slot, sky is opened on the next time slot behind the time slot of the Radio Beacon number that comprises in the priority access system sign and is sent answer signal, turns step 7;
Step 7: search engine has judged whether priority access time slot nonreply signal, is then to turn step 8; No, then turn step 9;
Step 8: jack per line conflict mode: search engine sends new request signal, and in the request signal, mode of operation is designated the jack per line conflict mode; In the priority access system sign, the sequence of time slots that mark can be selected with the Radio Beacon of tail number; The Radio Beacon of jack per line conflict selects a time slot to be used for sending beacon signal in the sequence of time slots that can select; Turn step 4;
Is is step 9: search engine judged in last angle measurement time slot and listened to beacon signal? if, then turn step 4, if not, then turn step 10;
Step 10: during search pattern, the mode flags of the request signal that search engine sends is set to search pattern, indicates the time slot and the free timeslot that have used in the time slot operating position, and the number of time slots of monitoring is constant, the zero clearing of priority access sign;
Step 11: judge in last angle measurement time slot to listen to beacon signal? if, then turn step 4, if not, then turn step 10.
The present invention brings following beneficial effect:
Search engine sends request signal, after the Radio Beacon that the drowning people carries is received request signal, send the radio beacon signal, the available machine time of every Radio Beacon is because successively drowning and different, search engine can't be determined the available machine time of every Radio Beacon, conflict free location when can realize smoothly a search engine to unlimited many Radio Beacon according to method provided by the invention.The rescue personnel determines the position of persons falling in water fast by the azimuth-range of search engine measurement beacon signal, greatly improves the rescue success rate; Accelerate the relief process.
Description of drawings:
Fig. 1: working time slot distribution diagram
Fig. 2: search engine handling procedure flow chart
Fig. 3: Radio Beacon handling procedure flow chart
Embodiment:
The present invention will be further described below in conjunction with the drawings and specific embodiments:
The maritime personal emergency position indicating system that the present invention was suitable for mainly carries search engine two parts by portable personal Radio Beacon and ship (aircraft) and forms.Search engine is installed in searches and rescues on helicopter and the search and rescue ship, and Radio Beacon is carried by the crewman.After the crewman fell into water, Radio Beacon can be sent the radio beacon signal, and the search engine of airborne or boat-carrying is determined SOS staff's position according to this signal, implements fast relief.Search and rescue for strengthening effects, Radio Beacon can also luminous, sounding, in situation closely and in night, attracts deliverer's attention.Radio Beacon should have good portability, sealing, aesthetic property and long flying power, is beneficial to the crewman and carries, and when being immersed in the water, also can work for a long time.Its basic functional principle is: the beacon signal of utilizing Radio Beacon to send is carried out the measurement of azimuth-range, or according to Radio Beacon send in the signal with GPS position and range information, judge that the drowning people apart from rescue worker's distance and bearing, is convenient in time sue and labour.
System adopts the time-division working method, sends respectively inquiry and beacon signal in time slot search machine and the Radio Beacon of regulation, and the situation of 40 angle measurement time slots is seen Fig. 1.
Wherein, the request signal frame comprises following data:
A demodulation synchrodata
B data-frame sync data
The c mode of operation
D current search machine sign (numbering of search engine)
E time slot operating position (identifying time slot and the untapped time slot of current use)
F priority access system sign (the Radio Beacon label of priority access)
The g check word
Other keeps data (being used for system extension) h;
The beacon signal frame comprises following data:
A demodulation synchrodata
B data-frame sync data
C is used for carrying out the data of angular surveying
The sign of d Radio Beacon (numbering of Radio Beacon)
The current search engine that accesses of e Radio Beacon
F GPS latitude and longitude information (the GPS latitude and longitude information that Radio Beacon receives, without the GPS module time, this byte keeps)
The tail number of g Radio Beacon sign (remainder of Radio Beacon identification number after to certain prime number delivery, the corresponding remainder of every bit.)
H reserve bytes (being used for system extension)
The i check byte.
Concrete workflow shown in Fig. 2,3,
Referring to Fig. 2, search engine takes following steps that n Radio Beacon realized time slot allocation:
Step 1: initialization: the search engine start that powers on, under this pattern, in the search engine request signal, mode of operation sign, priority access system banner and time slot operating position are for all being initialized as 0;
Step 2: start-up mode: after search engine sent request signal, search engine was monitored the Radio Beacon signal continuously on 0～n-1 the angle measurement time slot of an acknowledge cycle;
Does step 3: search engine listen to the Radio Beacon signal on the angle measurement time slot? have, then turn step 4; Nothing then turns step 2;
Do step 4, search engine judge that the tail number sign of the beacon signal that listens to shows to only have a Radio Beacon? then to enter the affirmation pattern of step 5; No, then search engine enters the contrary sign conflict mode of step 6;
Step 5, affirmation mode: search engine sends request signal; In the request signal, mode of operation is designated replys affirmation mode, the label of the Radio Beacon that receives on the record m angle measurement time slot in the priority access system sign and the access slot of this Radio Beacon are the priority access time slot, indicate in the time slot operating position and use and untapped time slot 0≤m≤n-1; Described priority access time slot is first free timeslot that uses behind the time slot; Radio Beacon judges according to the request signal of search engine whether the priority access system sign in this request signal is the label of oneself; If so, then send the Radio Beacon signal at the priority access time slot; If not, the next time slot that open behind the priority access time slot in the time slot sky of having used of then indicating in the operating position of crack in use sends beacon signal; Turn step 7;
Step 6: contrary sign conflict mode: search engine sends new request signal, and in the request signal, mode of operation is designated the contrary sign conflict mode; Be marked with in the priority access system sign: the tail number of the Radio Beacon of priority access be m, m+1 ..., m+p; And corresponding access slot i, i+1 ..., i+p; P is the Radio Beacon number that the tail number sign of the beacon signal that listens to of search engine shows; Indicate in the time slot operating position and take and unappropriated time slot; After sending request signal, after fixedly the Radio Beacon of time slot receives the request signal of contrary sign conflict mode, whether the tail number of oneself is arranged in the contrast priority access system sign, have then to send answer signal by its corresponding access slot; No, then after taking time slot, sky is opened on the next time slot behind the time slot of the Radio Beacon number that comprises in the priority access system sign and is sent answer signal, turns step 7;
Step 7: search engine has judged whether priority access time slot nonreply signal, is then to turn step 8; No, then turn step 9;
Step 8: jack per line conflict mode: search engine sends new request signal, and in the request signal, mode of operation is designated the jack per line conflict mode; In the priority access system sign, the sequence of time slots that mark can be selected with the Radio Beacon of tail number; The Radio Beacon of jack per line conflict selects a time slot to be used for sending beacon signal in the sequence of time slots that can select; Turn step 4; The Radio Beacon of jack per line conflict herein can at random or adopt certain algorithm to determine to select a time slot to be used for sending beacon signal;
Is is step 9: search engine judged in last angle measurement time slot and listened to beacon signal? if, then turn step 4, if not, then turn step 10;
Step 10: during search pattern, the mode flags of the request signal that search engine sends is set to search pattern, indicates the time slot and the free timeslot that have used in the time slot operating position, and the number of time slots of monitoring is constant, the zero clearing of priority access sign;
Step 11: judge in last angle measurement time slot to listen to beacon signal? if, then turn step 4, if not, then turn step 10.
Referring to Fig. 3, after Radio Beacon is opened, monitor the search engine signal; Do you judge according to the request signal of receiving whether oneself accesses? send beacon signal as accessing then at former time slot; Such as not access, then judge and which time slot access to send beacon signal in according to the sign of the mode of operation in the request signal.
Under above-mentioned working method, the worst situation is: all Radio Beacon all receive the request signal of start-up mode.After through flow process " start inquiry---＞No. 0 time slot is replied---＞reply and confirm inquiry---＞No. 0 time slot nonreply; No. 1 time slot is replied ", search engine has been learnt jack per line Radio Beacon time slot collision, all Radio Beacon all begin to select at random time slot in the next one inquiry cycle, send answer signal.
In this case, speed is the ships of 20 joints, and the time that disappears in the sphere of action (10km) of last time is:
t＝20/(20*1.852)≈1943.84s
All are not used for selecting at random with time slot, need to receive the answer signal of whole 40 time slots when then search engine receives.Within the ship t time, the inquiry number of cycles that search engine carries out altogether is:
l＝t/16.81≈116
Certain Radio Beacon this section in the period always covered probability be:
That is: any Radio Beacon signal is always very little by the probability that other Radio Beacon signal floods, and any Radio Beacon all can be found by the search engine on the ship before it disappears from the visual field of ship.
Claims (1)
1. the multi-user conflict processing method of maritime personal emergency position indicating system, it adopts ship/aircraft to carry search engine and portable personal Radio Beacon two parts form maritime personal emergency position indicating system; Search engine is installed in searches and rescues on helicopter and the search and rescue ship, and Radio Beacon is carried by the crewman; Search engine sends request signal, after the Radio Beacon that the drowning people carries is received request signal, sends the radio beacon set signal, and search engine receives the Radio Beacon signal and measures the azimuth-range of Radio Beacon, it is characterized in that:
Described search engine adopts the mode of time division multiple access to realize conflict free simultaneously location to n Radio Beacon; Search engine sends request signal at the inquiry time slot, in the acknowledge cycle, after search engine sends request signal, n Radio Beacon according to the request signal of receiving follow inquiring time slot after 0～n-1 angle measurement time slot send respectively the Radio Beacon signal; Reserve the protection interval between each time slot;
Wherein, the request signal frame comprises following data:
The demodulation synchrodata; The data-frame sync data; Mode of operation; Current search machine sign is for numbering, the time slot operating position of sign search engine; Be used for identifying time slot and the untapped time slot of current use; The priority access system sign is for the Radio Beacon label of sign priority access; Check word; Other keeps data, is used for doing system extension;
The Radio Beacon signal frame comprises following data:
The demodulation synchrodata; The data-frame sync data; Be used for carrying out the data of angular surveying; The sign of Radio Beacon is for the numbering of sign Radio Beacon; The current search engine that accesses of Radio Beacon; The GPS latitude and longitude information is used for the GPS latitude and longitude information that the sign Radio Beacon receives; The tail number sign of Radio Beacon; Reserve bytes is used for doing system extension; Check byte;
Described search engine takes following steps that n Radio Beacon realized time slot allocation:
Step 1: initialization: the search engine start that powers on, under this pattern, in the search engine request signal, mode of operation sign, priority access system sign and time slot operating position are for all being initialized as 0;
Step 2: start-up mode: after search engine sent request signal, search engine was monitored the Radio Beacon signal continuously on 0～n-1 the angle measurement time slot of an acknowledge cycle;
Does step 3: search engine listen to the Radio Beacon signal on the angle measurement time slot? have, then turn step 4; Nothing then turns step 2;
Does step 4: search engine judge that the tail number sign of the Radio Beacon signal that listens to shows to only have a Radio Beacon? then to enter the affirmation pattern of step 5; No, then search engine enters the contrary sign conflict mode of step 6;
Step 5: affirmation mode: search engine sends request signal; In the request signal, mode of operation is designated affirmation mode, the label of the Radio Beacon that receives on the record m angle measurement time slot in the priority access system sign and the access slot of this Radio Beacon are the priority access time slot, indicate in the time slot operating position and use and untapped time slot, 0≤m≤n-1; Described priority access time slot is first free timeslot that uses behind the time slot; Radio Beacon judges according to the request signal of search engine whether the priority access system sign in this request signal is the label of oneself; If so, then send the Radio Beacon signal at the priority access time slot; If not, the next time slot that open behind the priority access time slot in the time slot sky of having used of then indicating in the operating position of crack in use sends the Radio Beacon signal; Turn step 7;
Step 6: contrary sign conflict mode: search engine sends new request signal, and in the request signal, mode of operation is designated the contrary sign conflict mode; Be marked with in the priority access system sign: the tail number of the Radio Beacon of priority access be m, m+1 ..., m+p; And corresponding access slot i, i+1 ..., i+p; P is the Radio Beacon number that the tail number sign of the Radio Beacon signal that listens to of search engine shows; Indicate in the time slot operating position and take and unappropriated time slot; After sending request signal, after fixedly the Radio Beacon of time slot receives the request signal of contrary sign conflict mode, whether the tail number of oneself is arranged in the contrast priority access system sign, have then to send answer signal by its corresponding access slot; No, then after taking time slot, sky is opened on the next time slot behind the time slot of the Radio Beacon number that comprises in the priority access system sign and is sent answer signal, turns step 7;
Step 7: search engine has judged whether priority access time slot nonreply signal, is then to turn step 8; No, then turn step 9;
Step 8: jack per line conflict mode: search engine sends new request signal, and in the request signal, mode of operation is designated the jack per line conflict mode; In the priority access system sign, the sequence of time slots that mark can be selected with the Radio Beacon of tail number; The Radio Beacon of jack per line conflict selects a time slot to be used for sending the Radio Beacon signal in the sequence of time slots that can select; Turn step 4;
Is is step 9: search engine judged in last angle measurement time slot and listened to the Radio Beacon signal? if, then turn step 4, if not, then turn step 10;
Step 10: during search pattern, the mode flags of the request signal that search engine sends is set to search pattern, indicates the time slot and the free timeslot that have used in the time slot operating position, and the number of time slots of monitoring is constant, the zero clearing of priority access sign;
Step 11: judge in last angle measurement time slot to listen to the Radio Beacon signal? if, then turn step 4, if not, then turn step 10.
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| CN 200810042243 CN101662323B (en) | 2008-08-29 | 2008-08-29 | Multi-user conflict processing method for maritime personal emergency position indicating system |
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| CN 200810042243 CN101662323B (en) | 2008-08-29 | 2008-08-29 | Multi-user conflict processing method for maritime personal emergency position indicating system |
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| CN101662323B true CN101662323B (en) | 2013-04-17 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102423515B (en) * | 2011-09-13 | 2013-12-04 | 上海无线电设备研究所 | Portable personal beacon |
| CN102435977B (en) * | 2011-09-13 | 2013-02-13 | 上海无线电设备研究所 | One-way link communication method for maritime personal emergency position indication tracking equipment |
| CN109218989B (en) * | 2018-11-22 | 2020-05-26 | 中国电子科技集团公司第五十四研究所 | Sub-G frequency band ocean emergency call system |
| CN110956050A (en) * | 2019-12-30 | 2020-04-03 | 镇江中煤电子有限公司 | Mine personnel positioning card reader and control method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6222484B1 (en) * | 1999-06-16 | 2001-04-24 | Ronald L. Seiple | Personal emergency location system |
| CN101083501A (en) * | 2006-05-31 | 2007-12-05 | 中国科学院国家天文台 | Integration of navigation and communication based on time location and status information |
| CN201018478Y (en) * | 2005-09-23 | 2008-02-06 | 北京海洋信通网络技术服务有限公司 | Maritime wireless digital synthetic information terminal based on onshore wireless network system |
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2008
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6222484B1 (en) * | 1999-06-16 | 2001-04-24 | Ronald L. Seiple | Personal emergency location system |
| CN201018478Y (en) * | 2005-09-23 | 2008-02-06 | 北京海洋信通网络技术服务有限公司 | Maritime wireless digital synthetic information terminal based on onshore wireless network system |
| CN101083501A (en) * | 2006-05-31 | 2007-12-05 | 中国科学院国家天文台 | Integration of navigation and communication based on time location and status information |
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Granted publication date: 20130417 |