CN104837170B - A kind of gradual physical topology localization methods of WSN based on 802.15.4 communication protocols - Google Patents
A kind of gradual physical topology localization methods of WSN based on 802.15.4 communication protocols Download PDFInfo
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Abstract
The invention discloses a kind of gradual physical topology localization methods of WSN based on 802.15.4 communication protocols；During sensor is layouted, a line sensing node is often arranged, host computer just sends a sensor topology location data bag D by sinkA to one's own profession nodes, node is using broadcast relay pass-through mode by DsForwarded to sinkB, each node forwarding DsWhen the machine address is just attached to DsBelow, D is worked assWhen being received by sinkB, its content just contains whole forward-paths of the experience of the bag.This topology equivalence method, each wireless sensor node is limited during Topology Discovery can only carry out a data forwarding, effectively reduce node communication energy consumption；Only a node carries out data forwarding every time, avoids the generation of communication collision phenomenon in network；So that it is guaranteed that DsThe order traversal row whole node, ensure that the accuracy of node physical topology discovering.
Description
Technical field
The present invention relates to a kind of gradual physical topology hair of radio sensing network (WSN) based on 802.15.4 communication protocols
Existing method.
Background technology
With the appearance and popularization of technology of Internet of things, the application as the technology of wireless sensing network of Internet of things key technology
It is more and more extensive.Due to the demand of scientific research and application, it is necessary to carry out in real time or being regularly distributed to some parameters in restricted clearance
Formula monitors.Such as the monitoring of the parameter such as temperature in coal mine gob, oxygen concentration, gas density.Supervised to hold
The distribution characteristics of parameter in space is surveyed, generally requires a fairly large number of sensor node of distributed arrangement, forms monitoring grid,
If connecting each sensor node by wired mode, all it is in economy, security, deployment convenience, survivability etc.
It is unpractical, even not possible with, therefore in such application scenarios, often parameter is carried out using wireless sensor network
Distributed capture.
In restricted clearance, using wireless sensor network to some of which parameter（Such as the temperature in coal mine gob
Degree, gas density, oxygen concentration etc.）Distributed measurement is carried out, it is necessary to progressively dispose wireless sensing line by line in detection zone
Device node, host computer is when handling these sensor detection informations, it is necessary to clearly knows the physical location of these sensing nodes, examines
Considering reduces sensor deployment personnel labor intensity, avoids artificial record position error from being automatically determined, it is necessary to invent a kind of method
Each line sensor physical topology.In order to accurately handle the Monitoring Data of wireless sensor network, it is necessary to accurately realize sensor
The matching of node and deployed position, this just needs to determine arranging that each wireless sensor node therein carries out physical topology
Position, that is, realize the mailing address of sensor node and the matching of its deployed position.
The content of the invention
The object of the invention：Solve wireless sensor node mailing address and the matching problem in its place arranged, so as to
Ensure the correctness in each sensor node data source place；It is progressive to provide a kind of WSN based on 802.15.4 communication protocols
Formula physical topology localization method.
A kind of gradual physical topology localization methods of WSN based on 802.15.4 communication protocols, it is characterised in that including with
Lower step：
S1, according to sensor network topological structure, placement sensor node line by line；
S2, overall sensing network each side arrange a converging information node sinkA that can be moved forward and backward and
SinkB, sinkA and sinkB are connected with gateway；After newly arrangement a line wireless sensor node, sinkA and sinkB is simultaneously
It is moved at left and right sides of the row node；
S3, from sinkA to the row node broadcasts send sensor topology location data bag Ds, then receive the packet
Node broadcasts forwarding packet Ds, DsThe order traversal between the line sensor node, eventually arrives at sinkB nodes, each node
Forward DsWhen the machine address is just attached to DsBelow, the D of whole forward-paths will be finally contained by sinkBsUpload to upper
Machine；Wherein, forwarded over DsNode referred to as recorded node, not forwarded over DsNode do not record node, all the sensors section referred to as
Point, which is initially, does not record node；
The D that S4, host computer forward to sinkB in step S3sAnalyzed, parse the topological relation between egress, will be real
The mailing address of border physical location and each node matches.
Further, DsErgodic process comprises the following steps：
Step 1：One sensor topology location data bag D of PC control sinkA node broadcastss;
Step 2：Node is not recorded when one receives DsWhen, according to reception DsRSSI value calculate forwarding stand-by period Tw, node
Into wait state；
Step 3：If node is in period TwD is not received again by insides, the node mailing address is just attached to DsBelow, as
New DsForwarded with the forms of broadcasting, and mark the machine to have recorded node, avoid repeating to forward；
Step 4：If node is in waiting time TwInside receive new Ds, then according to newly being recalculated simultaneously to packet RSSI value
Configuration waits Tw, go to step 3；
Step 5：As one's own profession last sensor node forwarding DsWhen being received by sinkB, its content just contains the bag
Whole forward-paths, finally by sinkB by DsUpload to host computer；
Step 6：Host computer is to DsAnalyzed, the topological relation between egress is parsed, by actual physical location and each section
The mailing address of point matches.
Further, the DsForwarding uses identical transmission power.
Further, each wireless sensor node is provided with a minimum signal strength threshold value RSSIthreshIf one
Signal intensity when individual data reach node is less than RSSIthresh, the data are considered as noise by the node to be refused to receive.
Further, the step（2）Interior joint forwarding stand-by period computational methods comprise the following steps：
Step 5a：Node received signal strength is designated as RSSIr, calculate the signal strength difference RSSI that threshold value is received with noded
=RSSIr-RSSIthresh；
Step 5b：Node is according to RSSIdCalculate stand-by period Tw：
Second, RSSId> 0。
Further, in the step 5 sinkB to DsJudgement is carried out to comprise the following steps：
Step 6a：SinkB is receiving DsAfterwards, using the method for the step 5b, calculate and upload forwarding stand-by period Tw, such as
Fruit is not received again by D in waiting times, then after the stand-by period terminates, by DsIt is uploaded to host computer；
Step 6b：If in waiting time, D is received again bys, then step 6a is gone to.
The beneficial effects of the invention are as follows ensure that each sensor node need to only carry out data hair during Topology Discovery
Send, effectively reduce node communication energy consumption；A communication only node carries out data transmission every time, avoids communication in network and touches
The generation hit；Using RSSI attenuation laws, the position of the nearlyer node of range data source node distance, signal attenuation is more obvious, section
Point position is more easily determined, so the nearest node of chosen distance data source nodes preferentially forwards, be ensure that and is finally found
The accuracy of topology.
Brief description of the drawings
Fig. 1 is a kind of gradual physical topology localization method system knots of WSN based on 802.15.4 communication protocols of the present invention
Composition；
Fig. 2 is that sinkA of the present invention initiates DsFlow chart；
Fig. 3 is D of the present inventionsTransmitting procedure flow chart in wireless sensor network；
Fig. 4 is that sinkB of the present invention receives DsAfter be uploaded to host computer process flow diagram flow chart.
Embodiment
For the ease of understanding the present invention, the present invention is described more fully below with reference to relevant drawings.In accompanying drawing
Give the better embodiment of the present invention.But the present invention can be realized by many different forms, however it is not limited under
Embodiment described by face.On the contrary, the purpose for providing these embodiments makes to understand the disclosure
More thorough and comprehensive.
Unless otherwise defined, all of technologies and scientific terms used here by the article is with belonging to technical field of the invention
The implication that technical staff is generally understood that is identical.Term used in the description of the invention herein is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein "and/or" includes one or more
The arbitrary and all combination of related Listed Items.
This method basic ideas are, during sensor is layouted, often arrange a line sensing node, host computer just passes through
SinkA sends a sensor topology location data bag D to one's own profession nodes, node is using broadcast relay pass-through mode by DsTo
SinkB is forwarded, each node forwarding DsWhen the machine address is just attached to DsBelow, D is worked assWhen being received by sinkB, its content is just
Contain whole forward-paths of the experience of the bag.To ensure DsCan all nodes of order traversal one's own profession, provide following constraint
Condition：Each node only forwards a Ds, each DsConverting downlink direction only reach one or two node（Mainly it is
Ensure communication reliability）.As not forwarded over DsSensor node receive DsWhen, according to the RSSI value meter of received data packet
The forwarding stand-by period is calculated, RSSI is bigger, and the stand-by period is shorter, and the RSSI smaller stand-by period is longer.If node is waiting the phase to be forwarded
Between again receive new DsThen need to recalculate forward delay time, so as to ensure that closely node is relatively early to DsForwarding, at a distance
Node, which lags, forwards Ds, avoid forwarding from conflicting, so go on point by point, make DsTravel through all nodes of one's own profession.It is each so as to realize
The discovery of line sensor physical topology.Sensor node in the present invention can also be wireless sensor node.
For example, as shown in figure 1, a kind of gradual physical topology localization methods of WSN based on 802.15.4 communication protocols, its
It is characterised by, comprises the following steps：
S1, according to sensor network topological structure, placement sensor node line by line；
S2, overall sensing network each side arrange a converging information node sinkA that can be moved forward and backward and
SinkB, sinkA and sinkB are connected with gateway；After newly arrangement a line wireless sensor node, sinkA and sinkB is simultaneously
It is moved at left and right sides of the row node；
S3, from sinkA to the row node broadcasts send sensor topology location data bag Ds, then receive the packet
Node broadcasts forwarding packet Ds, DsThe order traversal between the line sensor node, eventually arrives at sinkB nodes, each node
Forward DsWhen the machine address is just attached to DsBelow, the D of whole forward-paths will be finally contained by sinkBsUpload to upper
Machine；Wherein, forwarded over DsNode referred to as recorded node, not forwarded over DsNode do not record node, all the sensors section referred to as
Point, which is initially, does not record node；
The D that S4, host computer forward to sinkB in step S3sAnalyzed, parse the topological relation between egress, will be real
The mailing address of border physical location and each node matches.
In order to ensure the fine transmission between node, the DsForwarding uses identical transmission power.
Further in order to ensure the fine transmission between node, each wireless sensor node is provided with a minimum
Signal strength threshold RSSIthreshIf a signal intensity when data reach node is less than RSSIthresh, the node counts this
Not received according to noise is considered as.
As shown in Fig. 2 combinations Fig. 3, DsThe specific method of traversal comprises the following steps：
Step 1：PC control sinkA nodes broadcast a sensor topology location data using 802.15.4 frame formats
Wrap Ds, topology equivalence instruction It, specified transmit power PtAnd DsPassed through sensor node mailing address AddrG is packaged as MAC and born
Carry, DsMac frame form be：
| Frame controls | Frame number | Address（Destination address+source address） | MAC is loaded | Verification |
MAC load formats：
| Topology equivalence instructs It | Specified transmit power Pt | DsPassed through sensor node mailing address AddrG |
AddrG initialization sinkA address is AddrsinkA。
Step 2：Node is not recorded when one receives Ds, record current data packet RSSIrValue, to DsUnpacked, analyzed
MAC is loaded, according to ItUnderstand that this node seriously goes through sensor topology position fixing process, the packet repeating power after setting is Pt
The RSSI that node receives according to thisdCalculate stand-by period Tw：
Second, RSSId> 0
Set and wait Tw, node, which enters, waits forwarding state.
Step 3：If node is in stand-by period TwD is not received again by insides, then TwAfter timing terminates, by the node communicatedly
Location is attached to as new AddrG behind AddrG, if the node is i, then AddrG is：
| AddrsinkA | Addr1 | Addr2 | ….. | Addri-1 | Addri |
With It, PtWith AddrG D is repacked as new MAC loadss, forwarded with the forms of broadcasting, while mark this
Machine avoids repeating to forward to have recorded node.
Step 4：If node is in waiting time TwInside receive new Ds, then according to newly being recalculated simultaneously to packet RSSI value
Configuration waits Tw.Go to step 3.
Step 5：Work as DsWhen being received by sinkB, as shown in figure 4, proceeding as follows：
（a）SinkB is to DsAfter unpacking, I is loaded according to MACtUnderstand DsIt is sensor topology location data bag, according to step 4
Formula calculate received data packet RSSI value calculate stand-by period Tw, wait Tw；
（b）If sinkB is not received again by D within the stand-by periods, then TwAfter timing terminates, by DsIt is uploaded to upper
Machine；
（c）If sinkB is received again by Ds in waiting time, T is recalculatedw, and it is T to refresh the stand-by periodw, go to
（b）.
Step 6：Host computer receives Ds, post analysis MAC loads are unpacked, AddrG contents should be when reaching host computer：
| AddrsinkA | Addr1 | Addr2 | ….. | Addrn-1 | Addrn |
Host computer is isolated from sinkB to sinkA from AddrG, and the sensor node address that Ds is traveled through, it is in sequence
In position just represent and respective actual physical location.
In order to facilitate the understanding of the purposes, features and advantages of the present invention, above in conjunction with accompanying drawing to the present invention
Embodiment be described in detail.Many details are elaborated in superincumbent description in order to fully understand this hair
It is bright.But the present invention can be to be much different from other manner described above to implement, those skilled in the art can be not
Similar improvement is done in the case of running counter to intension of the present invention, therefore the present invention is not limited by particular embodiments disclosed above.And
And each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not in above-described embodiment
The all possible combination of each technical characteristic be all described, if however, contradiction is not present in the combination of these technical characteristics,
All it is considered to be the scope of this specification record.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more specific and detailed, but simultaneously
Therefore the limitation to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention
Protect scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (5)
1. the gradual physical topology localization methods of a kind of WSN based on 802.15.4 communication protocols, it is characterised in that including following
Step：
S1, according to sensor network topological structure, placement sensor node line by line；
S2, overall sensing network each side arrange a converging information node sinkA that can be moved forward and backward and
SinkB, sinkA and sinkB are connected with gateway；After newly arrangement a line wireless sensor node, sinkA and sinkB is simultaneously
It is moved at left and right sides of the row node；
S3, from sinkA to the row node broadcasts sensor topology location data bag Ds is sent, then receive the node of the packet
Broadcast forwarding packet Ds, the Ds order traversal between the line sensor node, eventually arrives at sinkB nodes, each node turns
Just the machine address is attached to behind Ds when sending out Ds, the Ds for containing whole forward-paths is finally uploaded into host computer by sinkB；
Wherein, forwarded over Ds node has referred to as recorded node, and not forwarded over Ds node does not record node, all the sensors node referred to as
It is initially and does not record node；
S4, host computer are analyzed the Ds forwarded of sinkB in step S3, the topological relation between egress are parsed, by actual thing
Reason position and the mailing address of each node match；
Wherein, Ds ergodic processes comprise the following steps：
Step 1：One sensor topology location data bag Ds of PC control sinkA node broadcasts;
Step 2：When one, which is not recorded node, receives Ds, according to the RSSI value calculating stand-by period Tw for receiving Ds, node enters etc.
Treat state；
Step 3：If node is not received again by Ds in period Tw, just the node mailing address is attached to behind Ds, as new
Ds forwarded with the forms of broadcasting, and mark the machine to have recorded node, avoid repeating to forward；
Step 4：If node receives new Ds in waiting time Tw, basis is newly recalculated and configured to packet RSSI value
Tw is waited, goes to step 3；
Step 5：When one's own profession last sensor node forwarding Ds is received by sinkB, its content just contains the complete of the bag
Portion's forward-path, Ds is finally uploaded into host computer by sinkB；
Step 6：Host computer is analyzed Ds, parses the topological relation between egress, by actual physical location and each node
Mailing address matches.
2. the gradual physical topology localization methods of a kind of WSN based on 802.15.4 communication protocols according to claim 1,
Characterized in that, the Ds forwardings use identical transmission power.
3. the gradual physical topology localization methods of a kind of WSN based on 802.15.4 communication protocols according to claim 1,
Characterized in that, each wireless sensor node is provided with a minimum signal strength threshold value RSSIthresh, if a number
It is less than RSSIthresh according to signal intensity when reaching node, the data are considered as noise and not received by the node.
4. the gradual physical topology localization methods of a kind of WSN based on 802.15.4 communication protocols described in claim 1, it is special
Sign is that the step 2 interior joint forwarding stand-by period computational methods comprise the following steps：
Step 5a：Node received signal strength is designated as RSSIr, calculate with node receive the signal strength difference RSSId of threshold value=
RSSIr-RSSIthresh；
Step 5b：Node calculates stand-by period Tw according to RSSId：
Second, RSSId> 0.
5. the gradual physical topology localization methods of a kind of WSN based on 802.15.4 communication protocols according to claim 4,
Characterized in that, sinkB carries out judgement to Ds and comprised the following steps in the step 5：
Step 6a：SinkB, using the method for the step 5b, calculates stand-by period Tw, if in waiting time after Ds is received
Ds is not received again by, then after the stand-by period terminates, Ds is uploaded to host computer；
Step 6b：If in waiting time, Ds is received again by, then goes to step 6a.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102170648A (en) * | 2011-01-28 | 2011-08-31 | 北京浩阳华夏科技有限公司 | Passive diagnosis method of wireless sensor network |
| CN103152820A (en) * | 2013-02-06 | 2013-06-12 | 长安大学 | Method for iteratively positioning sound source target of wireless sensor network |
| CN104244270A (en) * | 2014-09-29 | 2014-12-24 | 安徽云维信息科技有限公司 | Precision agriculture oriented WSN (wireless sensor network) network partition and terminal node deployment method |
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| US20130235757A1 (en) * | 2012-03-07 | 2013-09-12 | Samsung Electronics Co. Ltd. | Apparatus and method for a biology inspired topological phase transition for wireless sensor network |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102170648A (en) * | 2011-01-28 | 2011-08-31 | 北京浩阳华夏科技有限公司 | Passive diagnosis method of wireless sensor network |
| CN103152820A (en) * | 2013-02-06 | 2013-06-12 | 长安大学 | Method for iteratively positioning sound source target of wireless sensor network |
| CN104244270A (en) * | 2014-09-29 | 2014-12-24 | 安徽云维信息科技有限公司 | Precision agriculture oriented WSN (wireless sensor network) network partition and terminal node deployment method |
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