CN110493846A - Coal mine work area based on Internet of Things integrates MAC and routing Data Transport Protocol - Google Patents
Coal mine work area based on Internet of Things integrates MAC and routing Data Transport Protocol Download PDFInfo
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- CN110493846A CN110493846A CN201810453304.1A CN201810453304A CN110493846A CN 110493846 A CN110493846 A CN 110493846A CN 201810453304 A CN201810453304 A CN 201810453304A CN 110493846 A CN110493846 A CN 110493846A
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- 239000003245 coal Substances 0.000 title claims abstract description 55
- 230000005540 biological transmission Effects 0.000 claims abstract description 63
- 238000004891 communication Methods 0.000 claims abstract description 20
- 238000005265 energy consumption Methods 0.000 claims abstract description 18
- 230000007613 environmental effect Effects 0.000 claims abstract description 5
- 238000012544 monitoring process Methods 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 11
- 238000002474 experimental method Methods 0.000 claims description 3
- 238000012546 transfer Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 claims description 2
- 230000001360 synchronised effect Effects 0.000 claims description 2
- 238000004088 simulation Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000004458 analytical method Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
- H04W40/04—Communication route or path selection, e.g. power-based or shortest path routing based on wireless node resources
- H04W40/10—Communication route or path selection, e.g. power-based or shortest path routing based on wireless node resources based on available power or energy
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
- H04W40/20—Communication route or path selection, e.g. power-based or shortest path routing based on geographic position or location
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
- H04W52/0216—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave using a pre-established activity schedule, e.g. traffic indication frame
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0251—Power saving arrangements in terminal devices using monitoring of local events, e.g. events related to user activity
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses the coal mine work areas based on Internet of Things to integrate MAC and routing Data Transport Protocol, including coal goaf and working face, it further include the WSN node in the communication environment being arranged in coal goaf and working face, the WSN node, which is all made of RDTP algorithm, to carry out data transmission, monitoring data converge to the SINK node of roadway workface, according to coal working face and goaf environmental quality, the coal working face and goaf environment are abstracted as a rectangular region A；The present invention is based on the abilities that the authentic data view of a geographical location information, integrated MAC and routing has pathfinding and shared channel access, realize routing and MAC information sharing, save node energy consumption, improve the reliability of network data transmission.
Description
Technical field
The invention discloses the coal mine work areas based on Internet of Things to integrate MAC and routing Data Transport Protocol.
Background technique:
It is existing to coal mine work area and goaf MAC there are the problem of include first, equal for range data flow
The problem of weighing apparatus, coal working face WSN point are in be distributed apart from shape, and data information is flowed out from the SINK point of roadway workface, according to
Secondary routing algorithm, uneven " stick vertebra formula " data traffic feature can be gone out in data journey.
The second, the influence of working face liquid bracket and the point communication that is situated between.In coal working face and goaf, having can not much be predicted
Event without communication generate interference, such as roof collapse, dense arrangement hydraulic support movement, installation electromagnetical interference.
The characteristic of third, goaf newly added node dynamic group net, coal working face are constantly mining coal, goaf
It being gradually expanded, new goaf can dispose new point, improve net function, it is desirable to WSN routing algorithm has good malleability,
When there is new point to be arranged in new goaf, net, the routing of row data can be rapidly joined.
The problem of 4th, node energy consumption.The main task of coal working face WSN is that working face and goaf occur to dash forward
The general work information of the environmental information sum of hair event, in security context and safety in production, the monitoring number of network transmission
Less according to data, the whole network work will cause unnecessary energy dissipation.Therefore, in no raw net event or the no line number of point
According to when, site can enter shape of sleeping, and save an energy；When being generated to event or node needs to forward data, it is desirable that node
It can be waken up from sleep state, to guarantee that network has lower data delay.
Summary of the invention
The purpose of the present invention is to provide the coal mine work areas based on Internet of Things to integrate MAC and routing Data Transport Protocol,
There is the ability of pathfinding and shared channel access based on the authentic data view of a geographical location information, integrated MAC and routing, it is real
Routing and MAC information sharing are showed, have saved node energy consumption, it is existing to solve to improve the reliability of network data transmission
There is caused above-mentioned defects in technology.
Concrete scheme of the invention is as follows: the coal mine work area based on Internet of Things integrates MAC and routing data transmission association
View, including coal goaf and working face, further include the WSN node in the communication environment being arranged in coal goaf and working face,
The WSN node, which is all made of RDTP algorithm, to carry out data transmission, and monitoring data converge to the SINK node of roadway workface, root
According to coal working face and goaf environmental quality, the coal working face and goaf environment are abstracted as a rectangular region A,
The WSN node for being arranged in coal goaf and working face is distributed in rectangular region A in a manner of uniformly random, in rectangle
SI and SIK is equipped in the A of domain, the SI is the data source nodes in goaf, and SIK is the data source nodes of working face, the SINK
The communication radius of node be R, at roadway workface, by goaf data source nodes SI generate data, in a manner of multi-hop to
SINK node transmits data, and the node between SI and SINK node in circle of dotted line is forward node, the coal floor data source section
Point SK transfers data to SINK node using mode identical with goaf.
As further limitation ground of the invention, the WSN node uses single-channel communication mode, and the course of work is by week
Phase T is executed, using RDTP agreement operating mode comprising three phases are respectively network operation more new stage, node
Sleep scheduling stage and authentic data based on node location forward the stage.
As further limitation ground of the invention, when the network operation more new stage is used to update the synchronization of WSN node
Clock, dump energy and degree of communication forward the calculating work in stage to prepare for the authentic data based on node location.
As further limitation ground of the invention, there is no or without data in event for the node sleep scheduling phase
When forwarding, node can enter sleep state, save energy, once event occurs or needs to forward data, node needs
It is waken up work in time, in order to guarantee the real-time reliable transmission of data, need in node sleep while saving node energy
Scheduling phase executes node sleep dispatching algorithm, and node listens to probability when the sleep scheduling stage starts, fully considers local
The degree of communication of node, the dump energy information of node itself and zone issue probability of happening.
As further limitation ground of the invention, the authentic data forwarding stage based on node location can be divided into node
Send competition, node forwarding competition and three processes of reliable data transmission:
It is sent in competition process in the node, it is contemplated that the priority of coal mine work area and goaf transmission data is not
Together, three transmit queues are set separately in MAC layer, store and forward the data of H1, H2 and H3 rank respectively；
The node forwarding competition process is after the node sends competition；
It further include analyzing RDTP protocol emulation, in order to accurately verify as further limitation ground of the invention
The performance of RDTP agreement carries out algorithm design to RDTP agreement and GERAF agreement using NS2 software, then soft using MATLAB
Part compares and analyzes experimental data comprising three aspects, respectively WSN node data transmission reliability, data transmission
Delay, node average energy consumption.
As further limitation ground of the invention, the WSN node data transmission reliability is hydraulic by coal mine work area
The equipment such as bracket and the change dielectric property of goaf communication media, which can communicate WSN node, to be had an impact, therefore to using different
The WSN node data transmission reliability of Data Transport Protocol has carried out emulation experiment, and data transmission credibility is defined as each
It takes turns in work, the ratio for the message total that all data source nodes of message total and WSN that SINK node receives generate.
As further limitation ground of the invention, when the data transmission delay examines the transmission of coal mine work area three classes data
Prolong, i.e., data message is from generating to by SINK node.
As further limitation ground of the invention, the node average energy consumption disappears for measuring nodes energy
After the average value of consumption, i.e. SINK node receive a data packet, the average value of each node consumption energy in whole network.
The present invention has the advantages that since no sensor network is used for coal working face and mined out area data transmission application
Need, since distribution is wide, density is big, data flow is uneven so that some WSN routing algorithms with meet coal mine work area and
The use demand of goaf data.The characteristics of for coal mine work area and goaf WSN routing algorithm, is based on node geo
The reliable data transmission protocol of location information, integrated MAC and routing is RDTP agreement, and simulation result shows that the agreement can drop
Low WSN node energy consumption guarantees the real-time of WSN data transmission, the reliability of improve data transfer.
Detailed description of the invention
Fig. 1 is coal working face of the present invention and goaf WSN Node distribution schematic diagram.
Fig. 2 is RDTP operating mode schematic diagram of the present invention.
Fig. 3 is the working face schematic diagram in simulation analysis of the present invention.
Fig. 4 is the goaf schematic diagram in simulation analysis of the present invention.
Fig. 5 to Fig. 7 is working face schematic diagram of a scenario of the present invention.
Fig. 8 to Figure 10 is goaf schematic diagram of a scenario of the present invention.
Specific embodiment
To be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, tie below
Specific embodiment is closed, the present invention is further explained.
As shown in Figure 1, the coal mine work area disclosed by the invention based on Internet of Things integrates MAC and routing data transmission association
View, including coal goaf and working face, further include WSN node, the WSN node in the goaf and working face is all made of
RDTP algorithm carries out data transmission, and monitoring data converge to the SINK node of roadway workface, according to coal working face and goaf
The environment is abstracted as a rectangular region A by environmental quality, is arranged in the WSN node of coal goaf and working face with uniform
Random fashion is distributed in rectangular region A, and SI and SIK is equipped in rectangular region A, and the SI is the data in goaf
Source node, SIK are the data source nodes of working face, and the communication radius of WSN node is R, SINK node at roadway workface,
Dotted line in figure indicates node data transmission direction, and goaf data source nodes SI generates data, in a manner of multi-hop to
SINK node transmits data, the node forward node between SI and SINK node in circle of dotted line, the node arranged in new goaf
Data forwarding and routing are not influenced, floor data source node SK uses mode identical with goaf by data transmission
To SINK node.
As shown in Fig. 2, each duty cycle Tw includes 3 stages in RDTP agreement: network operation more new stage Tsyn,
Node sleep scheduling phase Th, the authentic data based on node location forward stage Ts.Wherein, node sleep scheduling phase Th,
Authentic data based on node location forwards the stage, and the WSN node uses single-channel communication mode, and the course of work is by week
Phase T is executed, RDTP agreement operating mode comprising three phases are respectively network operation more new stage, node sleep
Scheduling phase and authentic data based on node location forward the stage.
The network operation more new stage is used to update synchronised clock, dump energy and the degree of communication of WSN node, is base
It prepares in the calculating work in the authentic data forwarding stage of node location.
The node sleep scheduling phase event there is no or when there is no data forwarding, node can enter sleep
State saves energy, once event occurs or needs to forward data, node needs are waken up work in time, in order to save
While saving node energy, guarantee the real-time reliable transmission of data, needs to execute node sleep scheduling in node sleep scheduling phase
Algorithm, node listen to probability when the sleep scheduling stage starts, and fully consider the degree of communication of local node, node itself
Dump energy information and zone issue probability of happening.
It is described based on node location authentic data forwarding the stage can be divided into node send competition, node forwarding competition and
Three processes of reliable data transmission:
It is sent in competition process in node, it is contemplated that coal working face is different with the priority of goaf transmission data, In
Three transmit queues are set separately in MAC layer, store and forward the data of H1, H2, H3 rank respectively；
Node forwards competition process after node sends competition；
The WSN data transmission credibility is by the equipment such as coal mine work area hydraulic support and goaf communication media
Change dielectric property WSN can be communicated and have an impact, therefore the WSN data using different data transport protocol are transmitted reliable
Property has carried out emulation experiment.Data transmission credibility is defined as in each round work, the message total that SINK node receives
The ratio of the message total generated with all data source nodes of WSN.
The data transmission delay examines the propagation delay time of coal mine work area three classes data, i.e., data message is from generating quilt
SINK node.
The node average energy consumption is used to measure the average value of nodes energy consumption, i.e. SINK node connects
After receiving 1 data packet, the average value of each node consumption energy in whole network.
As shown in Figure 3 and Figure 4, simulation analysis in summary, used simulating scenes and simulation parameter: due to work
The WSN routing algorithm for making face and goaf be work independently, so using working face and goaf as 2 scenes respectively into
Row simulation analysis.According to coal mine work area be long range belt-like zone the characteristics of, simulating scenes are set as 200m (length) × 4m
(width), node are 200, and goaf is very big unmanned working space, is set to a 60m (length) × 200m (width)
Rectangular region, node is 1000, and SINK node receives data at roadway workface, source node transmission message when
Between be spaced smaller, data transmission credibility is lower, otherwise reliability is higher, this is because source node was sent between the time of message
Every hour, the message that network needs to transmit in a short time is more, data congestion is caused, so as to cause message loss；It sends
When the time interval of message is big, transmission message is few, will not generate data congestion and message collision accident.
Such as Fig. 5 and Fig. 6, in 2 kinds of scenes, data transmission credibility transmits H1 rank data, RDTP according to RDTP agreement
Agreement transmission H2 rank data, RDTP agreement transmission H3 rank data, the sequence of GeR af agreement successively reduce.It is sent in data
When time interval is larger, the reliability of RDTP agreement and GeRa f agreement is all very high and almost the same, but in data transmission time
When being spaced smaller, the reliability of RDTP agreement transmission data is apparently higher than GeRaf agreement, can guarantee that network data can substantially
By transmission.This is because RDTP agreement introduces standby node, it can be in host node data transmission failure, at once based on conversion
Node carries out data transmission, and avoids data-bag lost.
Data transmission delay, when using RDTP agreement and GeRaf agreement, WSN data transmission delay simulation comparison such as Fig. 7
With shown in Fig. 8.
When using RDTP agreement and GeRaf agreement, WSN data transmission delay basic phase of variation tendency under 2 kinds of scenes
Together, be all source node send message time interval it is smaller, data transmission delay is bigger, otherwise data transmission delay is smaller, makes
At the main reason for phenomenon be send message time interval it is smaller, be more easy to cause network congestion, increase data delay.
In two kinds of scenes, data delay transmits H2 number of levels according to RDTP agreement transmission H1 rank data, RDTP agreement
It is sequentially increased according to, RDTP agreement transmission H3 rank data, the sequence of GeRaf agreement.When data transmission time interval is larger,
Delay when RDTP agreement 3 kinds of rank data of transmission is essentially identical, has significant difference when data transmission time interval is smaller.
This is primarily due to set the data transmit queue of 3 different stages in the node transmission competitive stage of RDTP agreement, guarantees
The real-time of high-priority data transmission.
Node average energy consumption: when using RDTP agreement and GeRaf agreement, WSN node, average energy consumption emulation
Comparison is as shown in Figure 9 and Figure 10.
When using RDTP agreement and GeRaf agreement, WSN node average energy consumption variation tendency under 2 kinds of scenes is basic
It is identical, it is unrelated with network size.
When sending the data of three kinds of ranks using RDTP agreement, WSN node average energy consumption is relatively stable, with net
The increase of network load, energy consumption slightly increase.This is primarily due to RDTP agreement using probability wake-up passive listening, greatly
Width reduces the number of nodes listened in network, to reduce node energy consumption.
When network load increases, node that when node transmission data can continually establish link, but wake up every time compared with
It is few, and node work is also to be performed by the period, if link establishment is unsuccessful, within next duty cycle, is had another
Outer node is waken up to complete link establishment work, thus the balanced energy consumption of nodes.
As known by the technical knowledge, the present invention can pass through the implementation of other essence without departing from its spirit or essential feature
Scheme is realized.Therefore, embodiment disclosed above, in all respects are merely illustrative, not the only.
All changes within the scope of the invention or within the scope equivalent to the present invention are included in the invention.
Claims (9)
1. the coal mine work area based on Internet of Things integrates MAC and routing Data Transport Protocol, including coal goaf and working face,
It is characterized in that, further includes the WSN node in the communication environment being arranged in coal goaf and working face, the WSN node is adopted
Carried out data transmission with RDTP algorithm, monitoring data converge to the SINK node of roadway workface, according to coal working face and mined out
The coal working face and goaf environment are abstracted as a rectangular region A, are arranged in coal goaf and work by area's environmental quality
The WSN node for making face is distributed in rectangular region A in a manner of uniformly random, and SI and SIK, institute are equipped in rectangular region A
The data source nodes that SI is goaf are stated, SIK is the data source nodes of working face, and the communication radius of the SINK node is R,
At roadway workface, by goaf data source nodes SI generate data, in a manner of multi-hop to SINK node transmit data, SI and
Node between SINK node in circle of dotted line is forward node, and the coal floor data source node SK is using identical with goaf
Mode transfers data to SINK node.
2. the coal mine work area according to claim 1 based on Internet of Things integrates MAC and routing Data Transport Protocol, special
Sign is: the WSN node uses single-channel communication mode, and the course of work is executed by cycle T, is worked using RDTP agreement
Mode comprising three phases, are respectively the network operation more new stage, node sleep scheduling phase and based on node location
Authentic data forwards the stage.
3. the coal mine work area according to claim 2 based on Internet of Things integrates MAC and routing Data Transport Protocol, special
Sign is: the network operation more new stage is used to update synchronised clock, dump energy and the degree of communication of WSN node, for based on
The calculating work in the authentic data forwarding stage of node location is prepared.
4. the coal mine work area according to claim 2 based on Internet of Things integrates MAC and routing Data Transport Protocol, special
Sign is: the node sleep scheduling phase event there is no or when there is no data forwarding, node can enter sleep shape
State saves energy, once event occurs or needs to forward data, node needs are waken up work in time, in order to save
While node energy, guarantee the real-time reliable transmission of data, needs to execute node sleep scheduling in node sleep scheduling phase and calculate
Method, node listen to probability when the sleep scheduling stage starts, and fully consider the degree of communication of local node, the residue of node itself
Energy information and zone issue probability of happening.
5. the coal mine work area according to claim 2 based on Internet of Things integrates MAC and routing Data Transport Protocol, special
Sign is: the authentic data forwarding stage based on node location can be divided into node and send competition, node forwarding competition sum number
According to three processes of reliable transmission:
It is sent in competition process in the node, it is contemplated that coal mine work area is different with the priority of goaf transmission data, In
Three transmit queues are set separately in MAC layer, store and forward the data of H1, H2 and H3 rank respectively；
The node forwarding competition process is after the node sends competition.
6. the coal mine work area according to claim 5 based on Internet of Things integrates MAC and routing Data Transport Protocol, special
Sign is: further including analyzing RDTP protocol emulation, in order to accurately verify the performance of RDTP agreement, using NS2 software
Algorithm design is carried out to RDTP agreement and GERAF agreement, then experimental data is compared and analyzed using MATLAB software,
Including three aspects, respectively WSN node data transmission reliability, data transmission delay, node average energy consumption.
7. the coal mine work area according to claim 6 based on Internet of Things integrates MAC and routing Data Transport Protocol, special
Sign is: the WSN node data transmission reliability is situated between by the equipment such as coal mine work area hydraulic support and goaf communication
The change dielectric property of matter can communicate WSN node and have an impact, therefore to the WSN node data using different data transport protocol
Transmission reliability has carried out emulation experiment, and data transmission credibility is defined as in each round work, and SINK node receives
The ratio for the message total that message total and all data source nodes of WSN generate.
8. the coal mine work area according to claim 6 based on Internet of Things integrates MAC and routing Data Transport Protocol, special
Sign is: the data transmission delay examines the propagation delay time of coal mine work area three classes data, i.e., data message is from generating quilt
SINK node.
9. the coal mine work area according to claim 6 based on Internet of Things integrates MAC and routing Data Transport Protocol, special
Sign is: the node average energy consumption is used to measure the average value of nodes energy consumption, i.e. SINK node receives
After one data packet, the average value of each node consumption energy in whole network.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130128786A1 (en) * | 2011-11-23 | 2013-05-23 | King Fahd University Of Petroleum And Minerals | Wireless sensor network with energy efficient protocols |
| CN105764112A (en) * | 2015-12-28 | 2016-07-13 | 湖南安全技术职业学院 | Mine roadway wireless sensor routing method and system based on multiple Sinks |
| CN107172678A (en) * | 2017-05-27 | 2017-09-15 | 河南科技大学 | Wireless sensor network geography information opportunistic routing protocol |
-
2018
- 2018-05-14 CN CN201810453304.1A patent/CN110493846A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130128786A1 (en) * | 2011-11-23 | 2013-05-23 | King Fahd University Of Petroleum And Minerals | Wireless sensor network with energy efficient protocols |
| CN105764112A (en) * | 2015-12-28 | 2016-07-13 | 湖南安全技术职业学院 | Mine roadway wireless sensor routing method and system based on multiple Sinks |
| CN107172678A (en) * | 2017-05-27 | 2017-09-15 | 河南科技大学 | Wireless sensor network geography information opportunistic routing protocol |
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