CN103108387B - A kind of method for building up of the multi-hop wireless self-organizing network being applied to agricultural - Google Patents
A kind of method for building up of the multi-hop wireless self-organizing network being applied to agricultural Download PDFInfo
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- CN103108387B CN103108387B CN201310039517.7A CN201310039517A CN103108387B CN 103108387 B CN103108387 B CN 103108387B CN 201310039517 A CN201310039517 A CN 201310039517A CN 103108387 B CN103108387 B CN 103108387B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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Abstract
The present invention relates to be applied to the method for building up of the multi-hop wireless self-organizing network of agricultural, comprise the following steps: initial network includes source node, child list and ordinary node, described source node sends networking broadcast frame；After described source node receives networking acknowledgement frame, logical topology frame is distributed for sending the node of networking acknowledgement frame, and the node identification and corresponding logical topology frame that send networking acknowledgement frame are stored in child list, send networking acknowledgement frame to the node sending networking acknowledgement frame, complete state hence into networking；Send after the node of networking acknowledgement frame receives networking acknowledgement frame, update mark and the logical topology frame of the father node of oneself；The node sending networking acknowledgement frame carries out time delay according to the logical topology frame of oneself, and self is carried out networking as source node until all nodes complete networking after terminating by time delay.The present invention, in the case of meeting fundamental need, reduces the overall power of network, reduces the requirement to hardware, it is possible to quickly draw topology of networks.
Description
Technical field
The present invention relates to cordless communication network technical field, particularly relate to a kind of multi-hop wireless ad hoc net being applied to agricultural
The method for building up of network.
Background technology
Along with constantly developing rapidly of MEMS, radio communication and digital circuit, there are low-power consumption, low cost, many merits
The sensor node of energy characteristic occurs in a large number.Sensor networks based on a large amount of sensor node deployments are also widely applied because of it
Prospect, increasingly comes into one's own.Wireless sensor network can be widely applied to military and civilian environment, carries out information
Collect and process, Object tracking and the detection of network environment, be especially suitable for being arranged in field, traffic main artery, medical treatment and safety
The occasions such as department.
And the application that wireless sensor network is agriculturally has the particularity that it is certain, it is embodied in: 1, network size
The hugest, interstitial content is more, but Node distribution ratio is relatively decentralized, and networking progression is the most.2, message transmission rate is low,
Data upload number of times infrequently, less demanding to the synchronous error of time.3, when node is placed, position is not random especially,
In general plot, a kind of crops of plantation, configure a sensing node, and node placement location must be in this block ground, other
Node is individually positioned in other ground, the general comparison rule in plot, is rectangle.But after having placed, a very long time
(a usually growth cycle of crops) interior position is fixed.4, the transmission direction ratio of data is more single, only need to be by certain
The mode of kind is transferred to gateway, it is not necessary to the information of extensive adjacent node is mutual.5, node is once thrown in, and keep
The considerably long working time, it requires more low-power consumption.
Existing wireless self-organization network typically uses the two-layer structure of packet to realize, so-called two-layer structure, refers to nothing
All nodes in line self-organizing network are divided into group leader's node and group member's node, between group leader's node and group member's node of a group
Composition group internal layer, composition group interbed between group leader's node and the base station of each group.Group leader's node broadcasts sets up vertical message invitation week
Other node addition groups enclosed, other nodes in addition to group leader's node, after receiving the vertical message of establishment, add from oneself
The group that near group leader's node is set up, becomes group member's node, and later directly with group leader's node communication, group leader's node is direct and base
Stand communication.Such networking mode is relatively more flexible, can communicate between arbitrary node, but for safeguarding route in network
Information is the most, and power dissipation ratio is bigger；The placement and group leader's node and ordinary node to be arranged in pairs or groups mutually, and contrast Sensor Network in agriculture
Application characteristic in terms of crop, this mode is easier to cause the existence of redundant node, adds cost；Again, typically
One sensing network uses same frequency, and collision problem exists always, although all use in the most a lot of radio frequency chips
CSMA/CA technology, but this mode adds the average operation time being successfully transmitted a data chip, and radio frequency chip
Power consumption when the state of transmission is maximum, the most greatly adds the average power consumption of node.
Summary of the invention
The technical problem to be solved is to provide the foundation side of a kind of multi-hop wireless self-organizing network being applied to agricultural
Method, utilizes the feature of agricultural radio sensing network self, in the case of meeting fundamental need, reduces the overall power of network,
Reduce the requirement to hardware, it is possible to quickly draw topology of networks.
The technical solution adopted for the present invention to solve the technical problems is: provide a kind of multi-hop wireless ad hoc being applied to agricultural
The method for building up of network, comprises the following steps:
(1) initial network includes source node, child list and ordinary node, and described source node sends networking broadcast frame；
(2), after described source node receives networking acknowledgement frame, logical topology frame is distributed for sending the node of networking acknowledgement frame, and
The node identification and corresponding logical topology frame that send networking acknowledgement frame are stored in child list, to sending networking acknowledgement frame
Node sends networking acknowledgement frame, completes state hence into networking；
(3) sending after the node of networking acknowledgement frame receives networking acknowledgement frame, the mark and the logic that update the father node of oneself are opened up
Flutter frame；
(4) node sending networking acknowledgement frame carries out time delay according to the logical topology frame of oneself, and self is made after terminating by time delay
Step (2) is repeated to step (4) until all nodes complete networking for source node.
Also include after described step (4) that ordinary node waits the time synchronized frame of source node broadcast transmission, update certainly after receiving
Oneself temporal information, the ordinary node of last layer sends the logic of oneself in the stipulated time to father node after carrying out time synchronized
Topology frame, father node forwards this logical topology frame to the father node of oneself again, until passing to source node.
In described step (2), source node is to all node distribution logical topology frames sending networking acknowledgement frame, and by all
The node identification and the corresponding logical topology frame that go out networking acknowledgement frame be stored in child list, to all networking acknowledgement frames that send
Node sends networking acknowledgement frame, completes state hence into networking.
After in described step (2), source node receives networking acknowledgement frame every time, record sends the mark of the node of networking acknowledgement frame
And the energy instruction of this frame in the radio frequency chip of this node, after the waiting time terminates, according to energy size from all records
Node identification in choose m, wherein, m is the frequency points that radio frequency chip is supported, big preferentially the choosing of energy, if
All record numbers are less than m, the most all choose, and then, mark and the source node of all nodes by screening are distributed
It is stored in child list to the logical topology frame of each node, and the node transmission networking being stored in child list successively is true
Recognize frame, and enter networking and complete state.
Beneficial effect
Owing to have employed above-mentioned technical scheme, the present invention compared with prior art, has the following advantages that and good effect:
The present invention proposes the method for building up of a kind of radio sensing network being applicable to agricultural, and the method takes into full account agricultural sensing network
Application characteristic, in the case of meeting fundamental need, reduce the overall power of network, reduce requirement to hardware.This
The network creating method of bright proposition uses the mode that father node is each child node distribution logical topology frame LOG_ID of oneself,
Logical topology frame LOG_ID can be used for TDMA during setting up and sends networking broadcast frame, can be used for after foundation terminates
Quickly generate network topological diagram.The mode that the anticollision measure of the present invention uses TDMA to combine CSMA/CA realizes, more preferably
The success rate that once sends of raising, reduce node power consumption.The utilization agricultural Sensor Network of the present invention is unwise to time synchronization error
The feature that sense is single with data transfer direction, decreases maintaining routing information between node mutual, reduces power consumption, use tree-shaped
Structure, preferably caters to data transfer direction unicity feature.
Accompanying drawing explanation
Fig. 1 is the flow chart of the network creating method that the present invention proposes；
Fig. 2 is the Network traffic model figure (the numbered decimal scale of LOG_ID) that the method that the present invention proposes generates；
Fig. 3 is networking broadcast frame structural representation；
Fig. 4 is networking acknowledgement frame structural representation；
Fig. 5 is networking acknowledgement frame structural representation；
Fig. 6 is logical topology frame structure schematic diagram；
Fig. 7 is that in embodiment, network sets up procedure declaration figure；
Fig. 8 is the Network traffic model figure (the numbered decimal scale of LOG_ID) generated in embodiment.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is expanded on further.Should be understood that these embodiments be merely to illustrate the present invention and
It is not used in restriction the scope of the present invention.In addition, it is to be understood that after having read the content that the present invention lectures, people in the art
The present invention can be made various changes or modifications by member, and these equivalent form of values fall within the application appended claims equally and limited
Scope.
Embodiments of the present invention relate to the method for building up of a kind of wireless self-organization network being applied to agricultural, and establishment step is such as
Under: (1) initial network includes source node: mark PHY_ID:0xaa, logical topology frame LOG_ID:0x01, father saves
Point PARENT_ID:NULL, child list Children_List full 0；Remaining node is ordinary node, equal,
Having the whole network and uniquely identify PHY_ID, other marks LOG_ID, PARENT_ID, Children_List are non-assignment shape
State.Each node has three states: 1. networking state 1, it is thus achieved that patrolling of the node identification PHY_ID of father node and father node distribution
Collecting topology frame LOG_ID, i.e. complete father node PAREENT_ID and the filling of logical topology frame LOG_ID, networking state 1 is complete
Networking state 2 is entered after one-tenth；2. networking state 2, it is thus achieved that child node identifies PHY_ID and distributes to the logical topology frame of child node
LOG_ID, i.e. completes the filling to oneself point list Children_List, and networking state 2 enters networking after completing and completes state；③
Networking completes state, and timing completes various task, such as time synchronized, uploads data, dormancy etc..(2) node powers on or weight
After opening initialization, source node and other nodes are in networking state 1, and source node enters transmission state, and other nodes enter and connect
Receipts state.Each node needs through " three-way handshake " in networking state 1:
Source node enters reception state after sending a networking broadcast frame；
All ordinary node random delay a period of times receiving this frame, then send out to source node (sending networking broadcast frame node)
Reception state is entered after sending networking acknowledgement frame；
Source node wait the t time (time that t once can send according to node, node send before random delay and CSMA/CA
In depending on maximum number of times of transmission), whenever the group receiving a node (assuming that node identification PHY_ID is 0xbb) within the t time
1. net acknowledgement frame, will perform following operation, the t time terminate after perform following operation 2. (two kinds of methods presented below):
Method one: be 1. stored at child list Children_List and receive mark PHY_ID (such as 0xbb) of node and source joint
The logical topology frame LOG_ID of some 0xbb node to be distributed to, the node identification PHY_ID of all networking acknowledgement frames and correspondence
Logical topology frame LOG_ID be all stored in child list Children_List, the most all child list Children_List
In node be all oneself child node.2., after waiting time t terminates, it is stored in child list Children_List successively
Node PHY_ID send networking acknowledgement frame, and enter networking and complete state.
Method two: the most a lot of radio frequency chips all can support several frequency (be assumed to be m), and most of radio frequency chip meeting
There is a problem being very difficult to solve: assume that the radio frequency chip of node A, when power is 20mw, can cover in theory
Scope is the circle of a radius R=50m centered by this node position, but in reality is tested, will often find that place
Node in the range of R1≤R≤50 (depending on R1 size is according to concrete chip) does not often receive the information of node A, Ji Gai district
Territory is unstable, the biggest by ectocine.For this feature, can use the most 1., 2. operate: receive group the most every time
Net acknowledgement frame, records the energy instruction of this frame in its logical topology frame PHY_ID and radio frequency chip, after when the time, t terminates,
From the node PHY_ID of all records, m is chosen according to energy size, big preferentially the choosing of energy, if all records
Number, less than m, is the most all chosen.Then, mark PHY_ID and the source node of all nodes by screening are distributed to respectively
The logical topology frame LOG_ID of node is stored in child list Children_List；The most successively to child list
The node PHY_ID that is stored in Children_List sends networking acknowledgement frame, and enters networking and complete state.Note: why choose
Number alternately may be used between father and son when being because subsequent network work less than or equal to m (m be radio frequency chip support frequency points)
To be limited to the frequency that logical topology last byte of frame LOG_ID of father node represents.I.e. with layer and with the son of father node
Node uses same frequency, with layer but the child node of different father node uses different frequencies, can prevent further the most again
Send collision conflict.Receive the node of networking acknowledgement frame, update oneself father node PARENT_ID and logical topology frame
LOG_ID, and enter networking state 2.The node state not receiving networking acknowledgement frame is still networking state 1, continues waiting for receiving
Networking broadcast frame.
(3) ordinary node is after entering networking state 2, carries out time delay, i.e. according to the logical topology frame LOG_ID of oneself
By the way of TDMA, self is treated as the process of " source node " repetition " three-way handshake " source node part.Due to distance
Reason is still in obtaining child node PHY_ID in the ordinary node of networking state 1 and distributing logical topology frame for child node
LOG_ID, fills child list Children_List, stores child node information, completes state subsequently into networking.Each layer
Ordinary node entering after networking state 2, all can repeat the process of " three-way handshake ", it is thus achieved that child node is also distributed logic for it and opened up
Flutter frame LOG_ID.But the node of same layer presses its logical topology frame LOG_ID time delay, completes " to hold for three times in TDMA mode
Hands " process, the node of next layer only could start this process after last layer node completes this process, and this is also to pass through logic
Topology frame LOG_ID controls.
(4), after above-mentioned steps completes, in network, all of node includes that source node and ordinary node all enter theoretically
Networking completes state.The most all ordinary nodes, after entrance networking completes state, wait the time synchronized frame of source node broadcast transmission,
Update the temporal information of oneself, the ordinary node of last layer, i.e. there is no the ordinary node of child node, after carrying out time synchronized
Sending the LOG_ID (logical topology frame) of oneself in the stipulated time to father node, father node forwards to the father node of oneself again should
LOG_ID, until passing to source node.Source node stores away the logical topology frame received, the most last according to the data in frame
The logical topology frame LOG_ID of one layer of ordinary node is it is known that the logical topological structure of whole network, and source node can lead to
Crossing network interface or serial ports and these data are passed to computer, computer just can draw the logical topology chart of network.Why claim
For logical topology chart, be because the LOG_ID according only to afterbody ordinary node and can't draw in logical topology chart every
The PHY_ID that individual node is corresponding.But this quadrat method is applicable to think quickly to know that network topological diagram is the most specifically concerned about topological diagram
The situation of the concrete node PHY_ID of each node.Certainly, after network builds up, source node can be opened up by sending physics
The mode flutterring inquiry frame specifically establishes the PHY_ID that in logical topology chart, each node is corresponding.
In the present invention, the coded system of logical topology frame LOG_ID is as follows: the logical topology frame LOG_ID of source node is 1；
The logical topology frame LOG_ID#Index that logical topology frame LOG_ID is its father node of child node (wherein # is connector,
Index is this child node sequence number in all nodes belonging to same father's node).Logical topology frame such as source node
LOG_ID is 1, with a byte storage, it is assumed that the child node (i.e. the node of the second layer) of source node has 5, then source node is given
The logical topology frame LOG_ID of child node distribution is 11,12,13,14,15 ..., with two byte storages, such as 14,
First character joint deposits 1, and second byte deposits 4.In like manner the node LOG_ID of third layer stores by three bytes, it is assumed that patrol
Volume topology frame LOG_ID be 14 child node have 15, then the logical topology frame LOG_ID of its child node be 141,
142 ..., 1415, such as 1415, three bytes are respectively 1,4,15, i.e. the logical topology frame LOG_ID of the node of n-th layer
Store by n byte.Logical topology frame in the present invention encoded after form as shown in Figure 2.Logical topology frame
This kind of coded system of LOG_ID has two kinds of effects: one: source node is according only to the logical topology frame of afterbody ordinary node
LOG_ID just can draw the logical topology chart of network.Two: transmit for TDMA mode, can according to logical topology LOG_ID
It is in same layer to allow but the node of different father node, is in same layer and the node with father node divides on the time when frame transmit
Open.Real work can operate as follows: assume to be in node its logical topology n byte of frame LOG_ID of n-th layer
Storage is respectively as follows: 1, x1、x2……xn-1, then during network is set up, this node starts to repeat " three after entering networking state 2
Secondary shake hands " delay time be xn-1*m+xn-2*m2+……x1*mn-1+1*mn, the unit of time (ms, us) of time delay with
And the value of m specifically can calculate according to using the processing speed of processor, the nodes of every layer.So, time delay passes
After defeated, just reach the requirement of above-mentioned TDMA, added that transmission is kept out of the way in the anti-collision detection of CSMA/CA, can preferably protect
Demonstrate,prove point-to-point between the reliability of transmission, thus improve efficiency.
The present invention is further illustrated below with a specific embodiment.
As it is shown in fig. 7, node number is 6, PHY_ID is respectively 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff, joint
Point branch is as it can be seen, 0xaa is source node, and LOG_ID is 0x01, and the communication distance of node is 50 meters, as it is shown in figure 1,
Network to set up process as follows:
After some initialization completes on all nodes of S1, enter networking state 1；
S2 source node sends networking broadcast frame (see figure 3), enters reception state, waiting time t；
S3 0xbb, 0xcc in source node communication range receives networking broadcast frame, respectively random delay and reply networking should
Answer frame (see figure 4)；
S4 source node receives the networking acknowledgement frame of 0xbb, 0xcc, is respectively it and distributes two bytes LOG_ID:0x010x02
And 0x010x01, then the mark PHY_ID of child node and corresponding logical topology frame LOG_ID(is shown in Fig. 6) it is stored in sub-joint
Point list Children_List, after send networking acknowledgement frame (see figure 5), source node entrance group respectively to node 0xbb, 0xcc
Net completes state；
S5 node 0xbb, 0xcc receive networking acknowledgement frame, update oneself father node PARENT_ID and logical topology frame
LOG_ID, and enter networking state 2；
S6 node 0xcc time delay 0x01*m2Start after+0x01*m to send networking broadcast frame, owing to not having node to communicate at it
Scope, so node is after waiting t time to be received, do not receive any networking acknowledgement frame, so labelling oneself is last
One node layer；
S7 node 0xbb time delay 0x01*m2Start after+0x01*m to send networking broadcast frame, after waiting the t time to be received, receive
To the networking acknowledgement frame of node 0xdd, distribute the logical topology frame LOG_ID:0x010x020x01 of three bytes for it, fill
Child list Children_List, enters networking and completes state after sending networking acknowledgement frame；
After S8 node 0xdd receives networking acknowledgement frame, update the father node PARENT_ID of oneself, logical topology frame
LOG_ID, and enter networking state 2；
S9 node 0xdd time delay 0x01*m3+0x02*m2Start after+0x01*m to send networking broadcast frame, wait t to be received
After time, receive the networking acknowledgement frame of node 0xee, 0xff, distribute nybble LOG_ID:0x010x020x010x01 for it
And 0x010x020x010x02, fill child list Children_List, enter networking after sending networking acknowledgement frame and complete state；
S10 node 0xee, 0xff time delay 0x01*m respectively4+0x02*m3+0x01*m2+ 0x01*m and
0x01*m4+0x02*m3+0x01*m2+ 0x02*m, sends networking broadcast frame, after waiting the t time to be received, does not receive
Acknowledgement frame, labelling oneself is last node layer, enters networking and completes state；
S11 enters networking and completes the time synchronized frame that all ordinary nodes wait source node of state sends, after synchronously completing, mark
The ordinary node being designated as last node layer sends logical topology frame at stipulated time t1 to father node, and remaining ordinary node forwards
Logical topology frame, until source node；
S12 source node resolves all logical topology frames received in the t1+t2 moment, and data reach server maps logic opens up
Flutterring figure, (being the coded system of the clearer expression LOG_ID of energy, the numeral in logical topology chart is all with ten as shown in Figure 8
System represents).
Claims (4)
1. the method for building up of the multi-hop wireless self-organizing network being applied to agricultural, it is characterised in that comprise the following steps:
(1) initial network includes source node, child list and ordinary node, and described source node sends networking broadcast frame；
(2), after described source node receives networking acknowledgement frame, logical topology frame is distributed for sending the node of networking acknowledgement frame, and will
The node identification and the corresponding logical topology frame that send networking acknowledgement frame are stored in child list, to sending networking acknowledgement frame
Node send networking acknowledgement frame, complete state hence into networking；Wherein, the coded system of logical topology frame is as follows:
The logical topology frame of source node is 1；The logical topology frame #Index that logical topology frame is its father node of child node, wherein,
# is connector, and Index is this child node sequence number in all nodes belonging to same father's node；
(3) send after the node of networking acknowledgement frame receives networking acknowledgement frame, update mark and the logical topology of the father node of oneself
Frame；
(4) node sending networking acknowledgement frame carries out time delay according to the logical topology frame of oneself, time delay terminate after using self as
Source node repeats step (2) to step (4) until all nodes complete networking.
The method for building up of the multi-hop wireless self-organizing network being applied to agricultural the most according to claim 1, it is characterised in that
Also include after described step (4) that ordinary node waits the time synchronized frame of source node broadcast transmission, after receiving, update oneself
Temporal information, the ordinary node of last layer sends oneself patrolling in the stipulated time to father node after carrying out time synchronized
Collecting topology frame, father node forwards this logical topology frame to the father node of oneself again, until passing to source node.
The method for building up of the multi-hop wireless self-organizing network being applied to agricultural the most according to claim 1, it is characterised in that
In described step (2), source node is to all node distribution logical topology frames sending networking acknowledgement frame, and sends all
The node identification of networking acknowledgement frame and corresponding logical topology frame are stored in child list, send networking acknowledgement frame to all
Node send networking acknowledgement frame, complete state hence into networking.
The method for building up of the multi-hop wireless self-organizing network being applied to agricultural the most according to claim 1, it is characterised in that
After in described step (2), source node receives networking acknowledgement frame every time, record send networking acknowledgement frame node mark with
And the energy instruction of this frame in the radio frequency chip of this node, after the waiting time terminates, according to energy size from all notes
Choosing m in the node identification of record, wherein, m is the frequency points that radio frequency chip is supported, big preferentially the choosing of energy,
If all record numbers are less than m, the most all choose, then, mark and the source of all nodes by screening
Node is distributed to the logical topology frame of each node and is stored in child list, and the node being stored in child list successively
Send networking acknowledgement frame, and enter networking and complete state.
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| CN106604410B (en) * | 2017-02-20 | 2020-03-27 | 中国电子科技集团公司第二十九研究所 | Method for realizing wireless self-organizing network establishment based on conflict detection and competition mode |
| CN110139399A (en) * | 2019-04-25 | 2019-08-16 | 中国科学院上海微系统与信息技术研究所 | A kind of mobile multi-hop ad hoc network and its network-building method |
| CN111628818B (en) * | 2020-05-15 | 2022-04-01 | 哈尔滨工业大学 | Distributed real-time communication method and device for air-ground unmanned system and multi-unmanned system |
| CN113766602A (en) * | 2020-06-04 | 2021-12-07 | 北京新岸线移动多媒体技术有限公司 | Networking method of wireless network and wireless network structure |
| CN112637923B (en) * | 2020-12-24 | 2022-11-11 | 南方电网数字电网研究院有限公司 | Node confirmation method and device, computer equipment and storage medium |
| CN112698606A (en) * | 2020-12-28 | 2021-04-23 | 国网北京市电力公司 | Processing method for collected message |
| CN113766596A (en) * | 2021-10-27 | 2021-12-07 | 广东卓维网络有限公司 | Wireless network ad hoc network method and system |
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