CN105682012B - A kind of data transmission method, mobile sensor node and data transmission system - Google Patents
A kind of data transmission method, mobile sensor node and data transmission system Download PDFInfo
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- CN105682012B CN105682012B CN201610202041.8A CN201610202041A CN105682012B CN 105682012 B CN105682012 B CN 105682012B CN 201610202041 A CN201610202041 A CN 201610202041A CN 105682012 B CN105682012 B CN 105682012B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
- H04W4/021—Services related to particular areas, e.g. point of interest [POI] services, venue services or geofences
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
- H04W4/025—Services making use of location information using location based information parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/02—Access restriction performed under specific conditions
- H04W48/04—Access restriction performed under specific conditions based on user or terminal location or mobility data, e.g. moving direction, speed
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/20—Selecting an access point
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- 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
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Abstract
The application provides a kind of data transmission method, system and mobile sensor node, in the method, user receives and processes first object data to be received in its movement routine by its mobile sensor equipment, and when in the wireless range for being moved to wireless access point, data to be uploaded stored in mobile sensor equipment are sent to server node using the wireless access point.It can be seen that when application the application, the mobile sensor equipment of user can be by the free opportunity network (such as bluetooth short distance sensing network) that forms between other sensing equipments in its movement routine, carry out data exchange, the transmission of mobile sensor equipment room, and it can be when being moved to corresponding wireless access point, data are delivered to server node using the wireless access point, to, the application realizes a kind of data transmission scheme based on free opportunity network, the enthusiasm of user's participation information offer can be effectively provided, and then promote the application quality of mobile intelligent perception.
Description
Technical field
The invention belongs to mobile gunz aware application field more particularly to a kind of data transmission methods, mobile sensor node
And data transmission system.
Background technique
Mobile intelligent perception is perception focusing on people, it utilizes and carries perception, calculating and communication capacity equipment
Mobile user perception, collection deliver information to provide universal service.
Nowadays, with the development of the mobile terminals such as smart phone and universal, the application of mobile intelligent perception is increasingly risen, benefit
Have with smart phone, onboard sensor equipment etc. and is well perceived and the mobile sensor equipment of wireless communication ability, people can be
Large-scale distributed information collection is carried out in daily moving process, is embodied as widely applying and decision offer endlessly counts
It is believed that breath.For example, predicted using the relevant information progress traffic congestion prediction and planning of participant's offer, public transport arrival information,
Monitoring, construction of city noise distribution map of city carbon dioxide etc..The realization of mobile gunz aware application needs to utilize people
The mobile sensors equipment such as smart phone of carrying acquires information, and the information of acquisition is then sent to data clothes by wireless network
Business center, on this basis, data service center are analyzed and processed data and carry out decision.
Currently, general using based on 3G/4G, (3rd-Generation/4th-Generation, third/forth generation are mobile
The communication technology) mobile network Point-to-Point Data Transmission mode, realize data acquisition of terminal to data service center upload, hand over
It pays, since 3G/4G network is currently non-free service, informant need to consume it and be determined based on certain expense when submitting information
The network flow of system so that the enthusiasm of informant's participation information offer can be reduced, and then influences answering for mobile intelligent perception
Use quality.
Summary of the invention
In view of this, the purpose of the present invention is to provide the transmission of a kind of data transmission method, mobile sensor node and data
System, it is intended to by realizing a kind of data transmission scheme based on free opportunity network, what Lai Tisheng user's participation information provided
Enthusiasm, and then promote the application quality of mobile intelligent perception.
For this purpose, the present invention is disclosed directly below technical solution:
A kind of data transmission method, comprising:
Obtain source position and the destination locations of mobile sensor equipment user；
It determines the destination path between the source position and the destination locations, and shows the destination path；It is described
Destination path includes wireless access point；
Judge whether the mobile sensor equipment user is mobile using the destination path；
If it is, receiving and processing first object data to be received on the destination path, and in the mobile biography
Equipment user is when being moved in the wireless range of the wireless access point for sense, using the wireless access point by the mobile sensor
The second target data to be uploaded is sent to server node in equipment.
The above method, it is preferable that the destination path are as follows: include wireless between the source position and the destination locations
The shortest path of access point.
The above method, it is preferable that the first object data include: on the destination path to sensing data and described
The data to be forwarded of other mobile sensor equipment on destination path；Second target data includes: the mobile sensor equipment
The sensing data of itself and forwarding data from other mobile sensor equipment.
The above method, it is preferable that the first object data include coding vector and first with for information, the then reception
And it handles the first object data to be received on the destination path and includes:
When meeting preset condition, the first object data on the destination path are received；Wherein, the preset condition
Are as follows: the coding vector of the first object data and second is the same as the coefficient matrix nonlinear correlation for information, wherein described second
With being the stored information with described first object data the same generation in the mobile sensor equipment for information；
Scheduled network code processing is carried out to the first object data, obtains corresponding coded data, and store institute
State coded data.
The above method, it is preferable that the network code processing is random linear network encoding.
A kind of mobile sensor node, has the mobility being synchronised with user in movement, and the node includes:
Position acquisition module, for obtaining source position and the destination locations of user；
Path determination module for determining the destination path between the source position and the destination locations, and is shown
The destination path；The destination path includes wireless access point；
Judgment module, for judging whether user is mobile using the destination path；
Data transmission and processing module, for when the judgment result is yes, receiving and processing to be received on the destination path
First object data, and when in the wireless range that user is moved to the wireless access point, utilize the wireless access point
Second target data to be uploaded in the mobile sensor node is sent to server node.
Above-mentioned mobile sensor node, it is preferable that the first object data include coding vector and first with for information, then
The data transmission and processing module includes:
Data receipt unit, for when meeting preset condition, receiving the first object data on the destination path；Its
In, the preset condition are as follows: the coding vector of the first object data is with second with the non-linear phase of coefficient matrix for information
Close, wherein described second with for information be in the mobile sensor equipment it is stored with described first object data the same generation
Information；
Data encoding unit obtains corresponding for carrying out scheduled network code processing to the first object data
Coded data, and store the coded data.
A kind of data transmission system, including wireless access point, server node and mobile sensor node as described above,
Wherein:
The mobile sensor node uploads data to the server node by the wireless access point.
Above system, it is preferable that the data that the mobile sensor node uploads are as follows: by the volume of default network code processing
Code data, then the server node is used for:
Processing is decoded to the coded data, obtains the sensing data that can be distinguished；And to the sensing distinguished
Data carry out required analysis processing and decision.
Above system, it is preferable that the wireless access point is Wireless Fidelity Wi-Fi Hotspot.
As it can be seen from the above scheme user is connect by its mobile sensor equipment in data transmission method disclosed in the present application
It receives and handles first object data to be received in its movement routine, and when in the wireless range for being moved to wireless access point,
Data to be uploaded stored in mobile sensor equipment are sent to server node using the wireless access point.It can be seen that application
When the application, the mobile sensor equipment of user can be by the free opportunity that forms between other sensing equipments in its movement routine
Network (such as bluetooth short distance sensing network), carries out data exchange, the transmission of mobile sensor equipment room, and can be moved to phase
When wireless access (such as Wi-Fi hotspot) point answered, data are delivered to server node using the wireless access point, thus, this
Application realizes a kind of data transmission scheme based on free opportunity network, can effectively promote the heat of user's participation information offer
Feelings, and then promote the application quality of mobile intelligent perception.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is the data transmission method flow chart that the embodiment of the present invention one provides；
Fig. 2 is data transmission method flow chart provided by Embodiment 2 of the present invention；
Fig. 3-Fig. 4 is the structural schematic diagram for the mobile sensor node that the embodiment of the present invention three provides.
Specific embodiment
For the sake of quoting and understanding, hereafter used in technical term, write a Chinese character in simplified form or abridge summary be explained as follows:
Weak secure network coding: being a kind of technology that weak security privacy protection is realized using network code, can compared with
It is low to calculate the lower secret protection etc. realized to informant of consumption, while information transmission success rate is improved, reduce the biography of network
Defeated expense.
Dijkstra's algorithm based on map: setting G=(L, E) is a Weighted Directed Graph, and L indicates Roads in Maps inflection point
With the location sets in crosspoint, vertex set L in figure is divided into two groups, first group is the vertex set S for having found out shortest path,
P corresponding vertex is added in set S by only one source point as soon as often acquiring a shortest path P later in S when initial, until
Whole vertex are all added in S, second group of vertex set U for remaining determining shortest path, by passing for shortest path length
Increase order successively second group of vertex is added in S.It is total to keep the most short of each vertex in from source point to S during addition
Path length is not more than the shortest path length on any vertex in from source point to U.In addition, one distance of each vertex correspondence, in S
The distance on vertex be exactly shortest path length from source point to this vertex, the distance on the vertex in U, is from source point to this vertex
Only include the current shortest path length that the vertex in S is intermediate vertex.
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
A kind of base is provided to solve the prior art existing above problem, the application when carrying out mobile gunz aware application
In the data transmission scheme of free opportunity network, to promote the enthusiasm of user's participation information offer, and then mobile gunz sense is promoted
The application quality known.Next, application scheme will be described in detail by multiple embodiments.
Embodiment one
The embodiment of the present invention one discloses a kind of data transmission method, and this method can be applied to smart phone, onboard sensor
Equipment etc. has the mobile sensor equipment being well perceived with wireless communication ability.
Mobile sensor equipment needs based on corresponding mobile sensor network the implementation of application scheme, and the present embodiment is specific
There is provided a kind of mobile sensor network based on opportunistic network and internet, wherein the opportunistic network is that mobile sensor equipment exists
In moving process, set by corresponding wireless communication technique, such as bluetooth the short distance wireless communication technology with other mobile sensors
Standby to be formed by short distance sensing network, which, which passes through, utilizes the Wi-Fi (Wireless being set in movement routine
Fidelity, Wireless Fidelity) wireless access point such as hot spot combine with internet, may make up application scheme and implement to execute when institute
The mobile sensor network needed.
The present embodiment defines all types of nodes included in mobile sensor network first:
1) mobile sensor node:
V={ vi|1≤i≤ω,i∈N+,ω∈N+}；
Wherein, V indicates the set of mobile sensor node, viIndicate that mobile sensor node, ω indicate in mobile sensor network
The number of mobile sensor node, N+Indicate natural number.
The mobile sensor node, which specifically can be above-described smart phone, onboard sensor equipment etc., to be had well
The mobile sensor equipment of perception and wireless communication ability.
2) wireless access point:
W={ wi|1≤i≤δ,i∈N+,δ∈N+}；
Wherein, W indicates the set of wireless access point, wiIndicate wireless access point, δ indicates the number of wireless access point.Institute
Stating wireless access point specifically can be Wi-Fi Hotspot, for accessing internet.
3) server node:
F={ f }；
Wherein, F indicates the set of server node, and f indicates that server node, the server node specifically can be net
With the server of corresponding data processing capacity in network.
On the basis of defining mobile sensor network and its node, continue to can be applied to move to provided by the present application below
The data transmission method of sensing node is illustrated, and with reference to data transmission method flow chart shown in fig. 1, the method be can wrap
Include following steps:
S101: source position and the destination locations of mobile sensor equipment user are obtained.
User specifically can be by using position to be arranged or input on the screen interface of the mobile sensors equipment such as smart phone
Etc. modes, the source position for submitting its this time mobile corresponding to mobile sensor equipment and destination locations.
S102: determine that the destination path between the source position and the destination locations, the destination path include nothing
Line access point.
In the present embodiment, the destination path includes the shortest path of Wi-Fi Hotspot between source position and destination locations
Diameter.
Specifically, the feature that the features of movement and Wi-Fi Hotspot of the present embodiment combination people is largely popularized, proposes a kind of H-
SPMBM (Hot Shortest Path Map Based Movement) mobility model, H-SPMBM mobility model allow people selecting
The shortest path arrived at the destination by Wi-Fi node is selectively chosen when selecting destination, in this way in increase people as small as possible
Moving distance while be significantly enhanced data transmission quality, the efficiency of improve data transfer.
In the model, by any two points A on map, between B after the dijkstra's algorithm based on map calculates
To shortest path length be denoted as D (A, B), user source position is denoted as Ls, destination locations are denoted as Le, enable D0=D (Ls,Le)。
And the source position L of user is calculated by formula below (1) and formula (2)sWith destination locations LeBetween include Wi-Fi Hotspot it is most short
Path Dmin:
Di=D (Ls,L(wi))+D(L(wi),Le) (1)
Dmin=Min (Di), 1≤i≤δ, (2)
Wherein, DiIt indicates to use the calculated user source position L of dijkstra's algorithm based on mapsWith destination locations
It is denoted as LeBetween pass through Wi-Fi Hotspot wiShortest path length, δ indicate mobile sensor network in Wi-Fi Hotspot number, Min
(Di) refer to all DiIn minimum value.
Calculating the shortest path D between the source position of user and destination locations including Wi-Fi HotspotminIt later, can be
Show that the shortest path is for reference in mobile sensor equipment, so that user selectively decides whether using the mesh
Mark path is moved to destination.
To avoid Dmin–D0It is excessive, a settable distance threshold β, length and the D when the destination path0Difference
Value is less than the distance threshold, i.e. Dmin–D0When≤β, it can suggest that user selects the destination path to be moved to destination；Phase
Instead, if the length of the destination path and the D0Difference be more than the distance threshold, i.e. Dmin–D0> β can then suggest using
Family is abandoned using the destination path, and selects path D0It is moved to destination.
S103: judge whether the mobile sensor equipment user is mobile using the destination path.
S104: if it is, receiving and processing first object data to be received on the destination path, and in the shifting
When dynamic sensing equipment user is moved in the wireless range of the wireless access point, using the wireless access point by the movement
The second target data to be uploaded is sent to server node in sensing equipment.
Wherein, the first object data include: on institute's destination path on sensing data and the destination path its
The data to be forwarded of his mobile sensor equipment；Second target data includes: the sensing number of the mobile sensor equipment itself
According to and from other mobile sensor equipment forwarding data.
It is showing calculated destination path, and after giving corresponding suggest, can continue to judge whether user finally selects to adopt
Destination is gone to the destination path.
If it is, smart phone, onboard sensor equipment etc. in user's moving process, as mobile sensor node
Mobile sensor equipment acquires the sensing data on the destination path in real time, is received, meanwhile, mobile sensor node is real-time
The forwarding data of other mobile sensor nodes on destination path are received, and in (such as current stored sensing data/turn in need
The data volume of hair data reaches given threshold) when, other mobile sensor node for data forwarding on destination path.
That is, user's mobile sensor equipment as mobile sensor node, is passed using it with other movements in movement routine
The opportunistic network for feeling node composition sends data to other mobile sensor nodes or receives turn from other mobile sensor nodes
Send out data.
When user's mobile sensor equipment as mobile sensor node is moved to the nothing of Wi-Fi Hotspot on the destination path
When within the scope of line, which is delivered to its stored sensing data/forwarding data in network by the Wi-Fi Hotspot
Server node, to realize the upload of sensing data/forwarding data.
If user does not use the destination path with Wi-Fi Hotspot finally, i.e., in the movement routine of user's use
It does not include Wi-Fi Hotspot, then the mobile sensor equipment of user acquires the sensing data in current movement routine in real time, and equally adopts
With carrying out required data forwarding between other mobile sensor equipment in scheduled data transmit-receive strategy and the path.
In order to motivate the user for carrying mobile sensor equipment to pass through Wi-Fi Hotspot, the embodiment of the present invention H- as far as possible
SPMBM mobility model provides a kind of incentive mechanism, specifically, since the objective of intelligent perception application is to provide diversification for user
Service, in the case where enjoyment service does not damage number one, user should undertake certain voluntary participation informations simultaneously and provide, and be based on
This, the present embodiment defines an excitation parameters reward, when initial, certain reward value is distributed for each user, when user passes through
It crosses and rewards certain reward value when Wi-Fi Hotspot participation information provides, and serviced in user using provided by intelligent perception
When, then certain reward value is consumed, and only when possessing enough reward values, user could be enjoyed provided by system
Service, to can motivate participant in moving process by Wi-Fi Hotspot by the balance of obligation and power.
As it can be seen from the above scheme user is connect by its mobile sensor equipment in data transmission method disclosed in the present application
It receives and handles first object data to be received in its movement routine, and when in the wireless range for being moved to wireless access point,
Data to be uploaded stored in mobile sensor equipment are sent to server node using the wireless access point.It can be seen that application
When the application, the mobile sensor equipment of user can be by the free opportunity that forms between other sensing equipments in its movement routine
Network (such as bluetooth short distance sensing network), carries out data exchange, the transmission of mobile sensor equipment room, and can be moved to phase
When wireless access (such as Wi-Fi hotspot) point answered, data are delivered to server node using the wireless access point, thus, this
Application realizes a kind of data transmission scheme based on free opportunity network, can effectively promote the heat of user's participation information offer
Feelings, and then promote the application quality of mobile intelligent perception.
Embodiment two
The data collected in intelligent perception, that is, utilizing can in the data of the mobile sensor network collection of the offer of the present embodiment one
It can include the sensitive informations such as position, time, the personal identification of informant, when this type of information is transmitted to other mobile sensor sections
The privacy that informant may be exposed when point, so that the safety and privacy to informant constitute a serious threat.
To solve this problem, the present embodiment proposes a kind of information transmission that weak secure network coding is incorporated in routing policy
Mechanism, to be applied to protect the privacy of informant in intelligent perception message transmitting procedure.
Based on this, in the present embodiment, with reference to Fig. 2 shows data transmission method flow chart, the step S104 specifically may be used
To be realized by following steps:
S201: when meeting preset condition, the first object data on the destination path are received；Wherein, described default
Condition are as follows: the coding vector of the first object data and second is the same as the coefficient matrix nonlinear correlation for information, wherein described
Second the same as being the stored information with described first object data the same generation in the mobile sensor equipment for information；
S202: scheduled network code processing is carried out to the first object data, obtains corresponding coded data, and deposit
Store up the coded data；
S203: when the mobile sensor equipment user is moved in the wireless range of the wireless access point, institute is utilized
It states wireless access point and the second target data to be uploaded in the mobile sensor equipment is sent to server node.
Wherein, with being the information for referring to participate in mutually coding for information, that is to say, that information only in same generation is
It can mutually encode, in the present embodiment, mobile sensor node specifically uses random linear network encoding mode to realize to received biography
Feel data/forwarding data and carry out weak secure network coding, to hide raw information, it is ensured that the safety of user sensitive information.
The present embodiment specifically provides weak secure network cataloged procedure below:
1) mobile sensor node receives model and cache policy based on the information of definition and receives and data cached.
Wherein, it is as follows that the information that the mobile sensor node u of definition receives message m receives model:
For node u ∈ V, it is assumed that u currently perceive or come other mobile sensor nodes in automatic network forward it is to be received
Information m=(α1,α2,…,an)(x1,x2,…,xn)T。
Wherein, (x1,x2,…,xn) it is to remember X=(x with the set for information in m1,x2,…,xn)T, (α1,α2,…,an)
For coding vector, it is denoted as A0, then m=A0X is denoted as M with m is the same generation packet for stored in u at this time,Its i-th of packet of the i-th behavior, is denoted as Mi, the massage set that includes in each packet
The information for sensing or forwarding at any time for participant, the coefficient matrix of M are denoted as A, then M=AX.Now by A and A0It is connected as new
Matrix, be denoted as
On this basis, cache policy below is set: when the coefficient matrices A in the coding vector and M in m is linearly related
When, since order Rank (A △) ≠ t+1, m of A △ is useless to finally decoding, so that node u rejects m；Otherwise, if in m
Coding vector and M in coefficient matrices A nonlinear correlation, then node u is received and is cached m.
2) mobile sensor node carries out coded treatment to received message.
Specifically, M is divided into two set M={ C, D }, remembers CiFor i-th of information in C, while remembering information in C
Number is | C |, the number of information is in D | D |.Information encoded in M is put into C, uncoded information is put into D, this
Shi RuoThen m is stored in u, whereas ifThen carried out in two kinds of situation according to whether m is generated by u sensing
It discusses:
<1>it is directed to the case where information m is by sensing node u sensing generation, ifThen every time by D, m, CiStorage is extremely
In new set H, random linear network encoding then is carried out to H using coding function Code (H), element number in C is denoted as |
C |, then pass through | C | secondary coding can be obtained | C | a new information；IfD and m are then merged into H, then using coding letter
Number Code (H) coding, encodes in total | D | it is secondary, obtain | D | a message.
<2>it is directed to the case where m is the forwarding information of sensing node u, ifD and m are then merged into H, then used
Coding function Code (H) coding, encodes in total | D | it is secondary, obtain | D | a message.IfEvery time by m, CiIt stores to new
In set H, random linear network encoding then is carried out using coding function Code (H), element number in C is denoted as | C |, then lead to
Cross | C | secondary coding can be obtained | C | a new information.
Original information in M is finally deleted, resulting information preservation will be encoded into u.
Wherein, the corresponding encryption algorithm of coding function Code (H) specifically:
Code (H) is the linear combination for carrying out information using random linear network encoding in finite field, all operations
In Fq(FqIndicate finite field) in complete.If
Then when carrying out random linear network encoding, l coefficient k is randomly taken out from finite field1,k2,…,kl, coding
The packet obtained afterwards is
Network code is blended in routing association by the information transmission mechanisms based on weak secure network coding that the present embodiment proposes
View is realized and is protected to the privacy in message transmitting procedure, while improving information in the case where less calculating consumption
The success rate of transmission.
Embodiment three
The embodiment of the present invention three discloses a kind of mobile sensor node, which has the shifting being synchronised with user on the move
Dynamic property, the node can be the mobile biography that smart phone, onboard sensor equipment etc. have excellent perception and wireless communication ability
Feel equipment, with reference to Fig. 2 shows mobile sensor node structural schematic diagram, which specifically includes:
Position acquisition module 100, for obtaining source position and the destination locations of user.
Path determination module 200 for determining the destination path between the source position and the destination locations, and is shown
Show the destination path；The destination path includes wireless access point.
Judgment module 300, for judging whether user is mobile using the destination path.
Data transmission and processing module 400, for when the judgment result is yes, receiving and processing waiting on the destination path
The first object data of receipts, and when in the wireless range that user is moved to the wireless access point, utilize the wireless access
Second target data to be uploaded in the mobile sensor node is sent to server node by point.
Wherein, with reference to Fig. 4, the data transmission and processing module 400 specifically includes data receipt unit 401 and data encoding
Unit 402.
Data receipt unit 401, for when meeting preset condition, receiving the first object number on the destination path
According to；Wherein, the preset condition are as follows: the coding vector of the first object data is non-thread with the coefficient matrix for information with second
Property it is related, wherein described second with for information be in the mobile sensor equipment it is stored same with the first object data
The information of a generation；
Data encoding unit 402 obtains corresponding for carrying out scheduled network code processing to the first object data
Coded data, and store the coded data.
For the mobile sensor node disclosed in the embodiment of the present invention three, since itself and embodiment one and embodiment two are public
The data transmission method opened is corresponding, so being described relatively simple, related similarity refers to embodiment one and embodiment
The explanation of data transmission method part in two, and will not be described here in detail.
Example IV
The embodiment of the present invention four discloses a kind of data transmission system, and the system comprises wireless access point, server node
And the mobile sensor node as described in embodiment three, wherein the mobile sensor node is by the wireless access point to institute
It states server node and uploads data.
The wireless access point is specially Wi-Fi Hotspot.
The data transmission system is specially all types of node institutes structure that the mobile sensor network based on embodiment one includes
At system, may include one or more mobile sensor nodes, Wi-Fi node and server node, the movement in the system
Data transmission scheme disclosed in embodiment one and embodiment two can be used in sensing node and network coding scheme carries out data transmission
And network code, to carry out data between each mobile sensor node in the opportunistic network being made of multiple mobile sensor nodes
It, can be by carrying out network code to received data when interaction, the privacy of user for including in received data is protected in realization
Shield.
Within the system, the data that only server node can just deliver mobile sensor node are decoded, and are connect down
To be illustrated to the decoding process of server node.
The decoding step of server node f is as follows:
Specifically, server node f is decoded by Gaussian elimination method, and information can recover original number by decoding
According to for the same generation data packet X=(x1,x2,…,xn), if the data packet that f is received is
It enablesIts coefficient matrix is denoted as A, then has Z=AX.
Assuming that the message m that server node f is received has been subjected to cache policy processing, the information in f with m the same generation is only considered
Packet.Message not decoded in m, f information decoded and f is added into Z first, and the information that f is decoded is marked.
Then Z=AX carries out Gaussian elimination to Z, Z'=A'X is obtained, for each row vector A' of A'i, work as xjWhen not being solved, such as
Fruit A'ij=1 andThen information xjIt can be solved, xj=Z'i。
The available data information that can be distinguished of server node after decoding, subsequent server node can be to decoded data
It is analyzed and processed and carries out decision.
It should be noted that all the embodiments in this specification are described in a progressive manner, each embodiment weight
Point explanation is the difference from other embodiments, and the same or similar parts between the embodiments can be referred to each other.
For convenience of description, it describes to be divided into various modules when system above or device with function or unit describes respectively.
Certainly, the function of each unit can be realized in the same or multiple software and or hardware when implementing the application.
As seen through the above description of the embodiments, those skilled in the art can be understood that the application can
It realizes by means of software and necessary general hardware platform.Based on this understanding, the technical solution essence of the application
On in other words the part that contributes to existing technology can be embodied in the form of software products, the computer software product
It can store in storage medium, such as ROM/RAM, magnetic disk, CD, including some instructions are used so that a computer equipment
(can be personal computer, server or the network equipment etc.) executes the certain of each embodiment of the application or embodiment
Method described in part.
Finally, it is to be noted that, herein, such as first, second, third and fourth or the like relational terms
It is only used to distinguish one entity or operation from another entity or operation, without necessarily requiring or implying these
There are any actual relationship or orders between entity or operation.Moreover, the terms "include", "comprise" or its is any
Other variants are intended to non-exclusive inclusion, so that including the process, method, article or equipment of a series of elements
Include not only those elements, but also including other elements that are not explicitly listed, or further includes for this process, side
Method, article or the intrinsic element of equipment.In the absence of more restrictions, limited by sentence "including a ..."
Element, it is not excluded that there is also other identical elements in the process, method, article or apparatus that includes the element.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (9)
1. a kind of data transmission method characterized by comprising
Obtain source position and the destination locations of mobile sensor equipment user；
It determines the destination path between the source position and the destination locations, and shows the destination path；The target
Path includes wireless access point；
Judge whether the mobile sensor equipment user is mobile using the destination path；
If it is, receiving and processing first object data to be received on the destination path, and set in the mobile sensor
When standby user is moved in the wireless range of the wireless access point, using the wireless access point by the mobile sensor equipment
In the second target data to be uploaded be sent to server node；
Wherein, the first object data include: on the destination path on sensing data and the destination path other
The data to be forwarded of mobile sensor equipment；Second target data includes: the sensing data of the mobile sensor equipment itself
And the forwarding data from other mobile sensor equipment.
2. the method according to claim 1, wherein the destination path are as follows: the source position and the purpose
It include the shortest path of wireless access point between position.
3. according to the method described in claim 2, it is characterized in that, the first object data include that coding vector and first are same
For information, then the first object data to be received received and processed on the destination path include:
When meeting preset condition, the first object data on the destination path are received；Wherein, the preset condition are as follows: institute
The coding vector and second of first object data is stated with the coefficient matrix nonlinear correlation for information, wherein the second same generation
Information is the stored information with described first object data the same generation in the mobile sensor equipment；
Scheduled network code processing is carried out to the first object data, obtains corresponding coded data, and store the volume
Code data.
4. according to the method described in claim 3, it is characterized in that, network code processing is random linear network encoding.
5. a kind of mobile sensor node, which is characterized in that have the mobility being synchronised with user in movement, the node packet
It includes:
Position acquisition module, for obtaining source position and the destination locations of user；
Path determination module, for determining the destination path between the source position and the destination locations, and described in display
Destination path；The destination path includes wireless access point；
Judgment module, for judging whether user is mobile using the destination path；
Data transmission and processing module receives and processes to be received the on the destination path for when the judgment result is yes
One target data, and when in the wireless range that user is moved to the wireless access point, using the wireless access point by institute
It states the second target data to be uploaded in mobile sensor node and is sent to server node；
Wherein, the first object data include: on the destination path on sensing data and the destination path other
The data to be forwarded of mobile sensor equipment；Second target data includes: the sensing data of the mobile sensor equipment itself
And the forwarding data from other mobile sensor equipment.
6. mobile sensor node according to claim 5, which is characterized in that the first object data include coding vector
And first with for information, then the data transmission and processing module includes:
Data receipt unit, for when meeting preset condition, receiving the first object data on the destination path；Wherein,
The preset condition are as follows: the coding vector of the first object data and second with the coefficient matrix nonlinear correlation for information,
Wherein, described second the same as being the stored letter with described first object data the same generation in the mobile sensor equipment for information
Breath；
Data encoding unit is encoded accordingly for carrying out scheduled network code processing to the first object data
Data, and store the coded data.
7. a kind of data transmission system, which is characterized in that including wireless access point, server node and such as claim 5-6
Mobile sensor node described in any one, in which:
The mobile sensor node uploads data to the server node by the wireless access point.
8. system according to claim 7, which is characterized in that the data that the mobile sensor node uploads are as follows: by pre-
If the coded data of network code processing, then the server node is used for:
Processing is decoded to the coded data, obtains the sensing data that can be distinguished；And to the sensing data distinguished
Analysis processing and decision needed for carrying out.
9. system according to claim 7, which is characterized in that the wireless access point is Wireless Fidelity Wi-Fi Hotspot.
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