CN106612326B - A kind of Internet of Things resource search method - Google Patents
A kind of Internet of Things resource search method Download PDFInfo
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Abstract
The invention discloses a kind of Internet of Things resource search method, local message is used by commission node, distributed search is suitably commissioned node, and provides the degree of belief for node of being commissioned；Meanwhile also sorting out task by core attribute task, and calculate the confidence level of a task type that do not entrusted of node of being commissioned, to choose, reliability is highest to be commissioned node to execute inter-related task；Above scheme can quickly and effectively obtain corresponding Internet of Things resource.
Description
Technical field
The present invention relates to internet of things field more particularly to a kind of Internet of Things resource search methods.
Background technique
Internet of Things is maximum to be changed the context aware for being to realize physical world, processing and controls this closed loop procedure,
Really become object-object, object-people, people-human world information connection New Generation of Intelligent internet.Internet of Things will be in reality
Object is connected by virtual internet, and intelligentized terminal has expedited the emergence of a large amount of new opplications, wherein important organized association
Work, personnel tracking and physical distribution localization.
In existing research work, usually assume that between sensing node it is to trust each other and can receive, forward and transmit times
What data, and actual application scenarios are: between node and prior trusting relationship is not present, a node can only forward it
The data or perception request, the request or data come to strange node-node transmission for knowing well node may ignore.
Meanwhile Internet of Things is a highly dynamic network, interstitial content is huge, and therefore, tradition centralization search faces
Challenge.In the recommended models based on trust evaluation, service needed for node is diversified, and entrust node, with by
Support node is not connected directly usually, how to carry out resource recommendation by part, existing information and search is Internet of Things resource
The problem of search.
Summary of the invention
The object of the present invention is to provide a kind of Internet of Things resource search methods, can be searched for using pessimistic or radical formula
Decision search, so that fast search can obtain the interdependent node of required thing networked resources.
The purpose of the present invention is what is be achieved through the following technical solutions:
A kind of Internet of Things resource search method, comprising:
When commission node, which needs to complete one, includes the task of several core attributes, selected according to its own performance conservative
Search strategy or radical formula search strategy；
If selecting conservative search strategy, node is entrusted to inquire the recommendation list of itself according to scheduled query strategy；
If inquiring the node of being commissioned that can complete all core attributes in the task, or recommended to complete institute in the task
There is core attribute to be commissioned the intermediate node of node, and be commissioned accordingly node or intermediate node in this search process also not
It is searched, then to the conservative searching request of node or intermediate node diffusion comprising the task of being commissioned accordingly, and is receiving
The confidence level for node of being commissioned is assessed after to response；
If selecting radical formula search strategy, node is entrusted to be arranged according to the recommendation that scheduled query strategy inquires itself
Table；If inquiring the node of being commissioned that can complete part core attribute in the task, or recommended that the task can be completed
Middle part core attribute is commissioned the intermediate node of node, and is commissioned node or intermediate node accordingly in this search process
It is not searched also, then to the radical formula searching request of node or intermediate node diffusion comprising the task of being commissioned accordingly, and
The confidence level for node of being commissioned is assessed upon receiving the response.
The commission node filters out highest be commissioned node of the node as execution task of being commissioned of confidence level, and issues committee
Support request；Later, according to the task execution situation for node of being commissioned, to node and/or the intermediate node imparting one of being commissioned accordingly
Confidence level, while updating itself recommendation list.
If the node of being commissioned receives the conservative searching request comprising the task, corresponding response is issued；If
The radical formula searching request comprising corresponding portion core attribute in the task is received, then waits a preset time T, also,
In preset time T, the radical formula searching request that different paths are sent also is received, and these requests cover pending task
All core attributes, then issue corresponding response；
If having received commission request, corresponding task is executed, and return to task action result.
If node of being commissioned executed some tasks, and the core attribute of these tasks meets what commission node needed to complete
All core attributes in task, then it is assumed that node of being commissioned can complete the task；
If node of being commissioned executed some tasks, and the core attribute of these tasks meets what commission node needed to complete
Part core attribute in task, then it is assumed that node of being commissioned can complete part core attribute in the task.
The be commissioned confidence level of node of the assessment upon receiving the response includes:
That node of being accordingly commissioned is assessed after the response for receiving node return of being commissioned did not entrusted setting for task type
Reliability；
Alternatively, recommending task according to intermediate node after receiving the response of node return of being commissioned of intermediate node forwarding
Confidence level estimation be accordingly commissioned the confidence level for not entrusting task type of node.
The task comprising several core attributes includes:
The total task constituted with aggregate form, and each essential attribute is core attribute in the set.
A kind of Internet of Things resource search method, comprising:
When intermediate node receives searching comprising the conservative of task for intermediate node forwarding that commission node is sent or upper
When rope is requested, intermediate node inquires the recommendation list of itself according to scheduled query strategy；If this can be completed by inquiring
The node of being commissioned of all core attributes in business, or recommended to complete the node of being commissioned of all core attributes in the task
Next intermediate node, and be commissioned node accordingly or next intermediate node is not searched also in this search process, then
To the conservative searching request of node or the diffusion of next intermediate node comprising task of being commissioned accordingly, and receiving node of being commissioned
Perhaps after the response of next intermediate node assessment be commissioned node confidence level again a upward node or commission node issue ring
It answers；
When intermediate node receives the radical formula comprising task of intermediate node forwarding that commission node is sent or upper
When searching request, intermediate node inquires the recommendation list of itself according to scheduled query strategy；If this can be completed by inquiring
The node of being commissioned of part core attribute in task, or recommended to complete part core attribute in the task and be commissioned node
Next intermediate node, and be commissioned node accordingly or next intermediate node is not searched also in this search process, then
To the radical formula searching request of node or the diffusion of next intermediate node comprising task of being commissioned accordingly, and receiving section of being commissioned
Perhaps be commissioned after the response of next intermediate node point a upward node or commission node are issued and rung again for the confidence level of node by assessment
It answers；
Later, intermediate node entrusts node and/or next centre to corresponding according to the task execution situation for node of being commissioned
Node assigns a confidence level, while updating itself recommendation list.
If node of being commissioned executed some tasks, and the core attribute of these tasks meets what commission node needed to complete
All core attributes in task, then it is assumed that node of being commissioned can complete the task；
If node of being commissioned executed some tasks, and the core attribute of these tasks meets what commission node needed to complete
Part core attribute in task, then it is assumed that node of being commissioned can complete part core attribute in the task.
As seen from the above technical solution provided by the invention, local message, distributed search are used by commission node
Suitable node of being commissioned, and provide the degree of belief for node of being commissioned；Meanwhile also task being sorted out by core attribute task, and calculates
Be commissioned node a task type that do not entrusted confidence level, to choose, confidence level is highest to be commissioned node to execute
Inter-related task；Above scheme can quickly and effectively obtain corresponding Internet of Things resource.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Attached drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this
For the those of ordinary skill in field, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is a kind of flow chart of Internet of Things resource search method provided in an embodiment of the present invention；
Fig. 2 is the flow chart of another Internet of Things resource search method provided in an embodiment of the present invention.
Specific embodiment
With reference to the attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear, complete
Ground description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on this
The embodiment of invention, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, belongs to protection scope of the present invention.
In the Internet of Things based on trust value, node is divided into three classes: node of being commissioned, commission node, intermediate node.It is commissioned section
Point has the ability for completing certain tasks, such as with camera, temperature sensing, GPS positioning etc..Commission node have it is a series of to
The task of completion.Some commission nodes X, which completes the ability of task and hope to some node y that is commissioned, an assessed value, referred to as
Confidence level.It entrusts nodes X before committal charge, node of being suitably commissioned can be searched for, and according to the historic task for node of being commissioned
Performance calculates the confidence level that node of being commissioned executes current task.The maximum node of being commissioned of last confidence level executes task.In
Intermediate node can recommend suitably to be commissioned node or next intermediate node gives commission node, and record recommendation information to recommending column
Which node of being commissioned table, i.e. record recommend execute which task or which next intermediate node recommends node of being commissioned, and root
According to task execution situation, to node or intermediate node one confidence level of imparting of being commissioned.These information are recorded in recommendation list.
Similarly, also recording-related information records which node of being commissioned executes which task to the recommendation list of itself to commission node,
Or which intermediate node recommends node of being commissioned, and according to task execution situation, to node or the intermediate node imparting of being commissioned
One confidence level.
In the embodiment of the present invention, a task includes several core attributes, constitutes a set { a1, a2, a3 ... },
Each element in set is core attribute.Illustratively, if task is inquiry roads situation, core attribute be can wrap
It includes: link location information, vehicle speed information and road associated picture etc. in road.
It in embodiments of the present invention, include two kinds of search strategies: pessimistic search strategy, radical formula search strategy.It is conservative
Formula search strategy refers to: some node z once recommends or executed some tasks in the recommendation list of intermediate node or commission node,
The core attribute of these tasks meets the core attribute of all current tasks, then searching request is diffused by this once recommended this
Next intermediate node of task is diffused into the node of being commissioned for once executing this task.
Pessimistic search strategy may search for less node of being commissioned, but search cost is smaller.Radical formula search strategy
Refer to: some node z once recommends or executed some tasks in the recommendation list of intermediate node or commission node, these tasks
Core attribute meets the core attribute of part current task, then searching request is diffused by this once recommended the next of this task
Intermediate node is diffused into the node for once executing this task.If searching some section of being commissioned by different searching routes
Point while all core attributes for meeting current task, then this node is the potential node of being commissioned of this achievable task.Radical formula
Search strategy may search for node of being more commissioned, but search cost is higher.Commission node is needed according to task using two kinds
One of searching method.
The present invention is described in detail combined with specific embodiments below.
Embodiment one
The embodiment of the present invention provides a kind of Internet of Things resource search method, and this method is searched based on node with entrusting
Rope, as shown in Figure 1, its process is as follows:
(1) it when commission node, which needs to complete one, includes the task of several core attributes, is selected according to its own performance
Conservative search strategy or radical formula search strategy.
As previously mentioned, conservative search strategy search cost is smaller, radical formula search strategy search cost is higher, therefore, can
To select corresponding search pattern according to self performance or other demands, to enter following " (2) step " accordingly
Or " (3) step ".
(2) if selecting conservative search strategy, node is entrusted to be arranged according to the recommendation that scheduled query strategy inquires itself
Table；If inquiring the node of being commissioned that can complete all core attributes in the task, or recommended that the task can be completed
All core attributes are commissioned the intermediate node of node, and be commissioned accordingly node or intermediate node in this search process also
It is not searched, then to the conservative searching request of node or intermediate node diffusion comprising the task of being commissioned accordingly, and is connecing
Receive the confidence level that node of being commissioned is assessed after responding.
In conservative search strategy, if node of being commissioned executed some tasks, and the core attribute of these tasks meets
All core attributes in task that commission node needs to complete, then it is assumed that node of being commissioned can complete the task；That is,
The core attribute in historic task that node of being commissioned is completed is needed comprising all core attributes in this being executed for task.
Commission node can search for always relevant node in Internet of Things, until can not find the node for meeting correlated condition,
Then enter following " (4) step ".
(3) if selecting radical formula search strategy, node is entrusted to inquire the recommendation of itself according to scheduled query strategy
List；If inquiring the node of being commissioned that can complete part core attribute in the task, or recommended that this can be completed
Part core attribute is commissioned the intermediate node of node in business, and be commissioned accordingly node or intermediate node are in this search process
In be not searched also, then to be commissioned accordingly node or intermediate node diffusion include the task radical formula searching request,
And the confidence level for node of being commissioned is assessed upon receiving the response.
In radical formula search strategy, if node of being commissioned executed some tasks, and the core attribute of these tasks is full
The part core attribute in task that foot commission node needs to complete, then it is assumed that node of being commissioned can complete pyrene in the middle part of the task
Heart attribute.It is different from search strategy is guarded above, it only requires and is commissioned in the historic task of node completion in radical formula search strategy
Core attribute and this being executed for task in core attribute presence partially overlap, certainly, in contrast search for
Cost is inevitable higher.
Commission node can search for always relevant node in Internet of Things, until can not find the node for meeting correlated condition,
Then enter following " (4) step ".
In both above search strategy, the assessment that commission node can all carry out confidence level upon receiving the response is calculated；
Specifically: the confidence for not entrusting task type for node of being accordingly commissioned is assessed after the response for receiving node return of being commissioned
Degree, the reference conditions of assessment can be the performance for node historic task of being commissioned；Alternatively, receiving intermediate node forwarding
After the response that node of being commissioned returns, the confidence level estimation of task is recommended accordingly to be commissioned not the entrusting of node according to intermediate node
The confidence level of task type.
(4) the commission node filters out highest be commissioned node of the node as execution task of being commissioned of confidence level, concurrently
Commission request out；Later, according to the task execution situation for node of being commissioned, to node and/or the intermediate node imparting of being commissioned accordingly
One confidence level, while updating itself recommendation list.
Under normal conditions, there are multiple node returning responses of being commissioned after executing " (2) step " or " (3) step " above,
It just needs to be screened out from it most suitable node of being commissioned at this time；Screening conditions in the embodiment of the present invention are the big of confidence level
It is small, task is finally executed by the maximum node of being commissioned of confidence level.
Meanwhile entrusting node also according to the task execution situation for node of being commissioned, one, which is assigned, to node of being commissioned accordingly sets
Reliability；If this is commissioned, node is recommended by intermediate node, assigns a confidence level to corresponding intermediate node；Finally, again
Update itself recommendation list.
For being commissioned node: if receiving the conservative searching request comprising the task, issuing corresponding corresponding；
If receiving the radical formula searching request comprising corresponding portion core attribute in the task, one is waited to preset
Time T, also, in preset time T, the radical formula searching request that different paths are sent also is received, and these requests are covered
All core attributes of pending task then issue corresponding response；Illustratively, if containing A, B, C, D in task
Four core attributes, and node of being commissioned can complete these core attributes, but node is entrusted not know.When a certain middle node
Point can complete core attribute A therein and B (or querying node of being commissioned is to currently to commission nodes recommendations node of being currently commissioned
Node of being commissioned can complete core attribute A and B therein), then node of being currently commissioned will be received from current path comprising core
The radical formula searching request of attribute A and B, but node of being currently commissioned at this time can't respond, but continue waiting for；At the same time,
Another intermediate node can complete core attribute C and D therein to commission nodes recommendations node of being currently commissioned, then, currently by
Support node will receive the radical formula searching request comprising core attribute C and D from another path, that is to say, that in above-mentioned example,
All core attributes of pending task are covered in the radical formula searching request that different paths are sent.Meanwhile also when waiting
In, then node of being currently commissioned can issue response.
If having received commission request, corresponding task is executed, and return to task action result.
Embodiment two
The embodiment of the present invention provides a kind of Internet of Things resource search method, and this method is searched based on intermediate node
Rope, as shown in Fig. 2, its process is as follows:
(1) when intermediate node receives the conservative comprising task of intermediate node forwarding that commission node is sent or upper
When searching request, intermediate node inquires the recommendation list of itself according to scheduled query strategy；If this can be completed by inquiring
The node of being commissioned of all core attributes in task, or recommended to complete the node of being commissioned of all core attributes in the task
Next intermediate node, and be commissioned node accordingly or next intermediate node is not searched also in this search process,
Then to the conservative searching request of node or the diffusion of next intermediate node comprising task of being commissioned accordingly, and receiving section of being commissioned
Perhaps be commissioned after the response of next intermediate node point a upward node or commission node are issued and rung again for the confidence level of node by assessment
It answers.
In this step, if node of being commissioned executed some tasks, and the core attribute of these tasks meets commission section
All core attributes in task that point needs to complete, then it is assumed that node of being commissioned can complete the task.
(2) when intermediate node receives the radical comprising task of intermediate node forwarding that commission node is sent or upper
When formula searching request, intermediate node inquires the recommendation list of itself according to scheduled query strategy；If inquiring can complete
The node of being commissioned of part core attribute in the task, or recommended to complete part core attribute in the task and be commissioned node
Next intermediate node, and be commissioned node accordingly or next intermediate node is not searched also in this search process,
Then to the radical formula searching request of node or the diffusion of next intermediate node comprising task of being commissioned accordingly, and it is commissioned receiving
Perhaps be commissioned after the response of next intermediate node node a upward node or commission node issue again for the confidence level of node by assessment
Response.
In this step, if node of being commissioned executed some tasks, and the core attribute of these tasks meets commission section
The part core attribute in task that point needs to complete, then it is assumed that node of being commissioned can complete part core attribute in the task.
(3) intermediate node entrusts node and/or next middle node to corresponding according to the task execution situation for node of being commissioned
Point assigns a confidence level, while updating itself recommendation list.
It is emphasized that the technical characteristics such as task, core attribute described in the present embodiment, and the work for node of being commissioned
The contents such as process are similar with previous embodiment one, and so it will not be repeated.
In the embodiment of the present invention, local message is used by commission node, distributed search is suitably commissioned node, and is provided
It is commissioned the degree of belief of node；Meanwhile one for also being sorted out by core attribute task, and being calculated node of being commissioned task did not entrusted
The confidence level for the task type crossed, to choose, confidence level is highest to be commissioned node to execute inter-related task；Above scheme can be with
Quickly and effectively obtain corresponding Internet of Things resource.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment can
The mode of necessary general hardware platform can also be added to realize by software by software realization.Based on this understanding,
The technical solution of above-described embodiment can be embodied in the form of software products, which can store non-easy at one
In the property lost storage medium (can be CD-ROM, USB flash disk, mobile hard disk etc.), including some instructions are with so that a computer is set
Standby (can be personal computer, server or the network equipment etc.) executes method described in each embodiment of the present invention.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Within the technical scope of the present disclosure, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims
Subject to enclosing.
Claims (7)
1. a kind of Internet of Things resource search method characterized by comprising
When commission node, which needs to complete one, includes the task of several core attributes, conservative search is selected according to its own performance
Tactful or radical formula search strategy；
If selecting conservative search strategy, node is entrusted to inquire the recommendation list of itself according to scheduled query strategy；If
The node of being commissioned that can complete all core attributes in the task is inquired, or recommended to complete all cores in the task
Heart attribute is commissioned the intermediate node of node, and is commissioned node accordingly or intermediate node is not searched also in this search process
Rope mistake then to the conservative searching request of node or intermediate node diffusion comprising the task of being commissioned accordingly, and is receiving sound
The confidence level for node of being commissioned should be assessed afterwards；
If selecting radical formula search strategy, node is entrusted to inquire the recommendation list of itself according to scheduled query strategy；Such as
Fruit inquires the node of being commissioned that can complete part core attribute in the task, or recommends that part in the task can be completed
Core attribute is commissioned the intermediate node of node, and be commissioned accordingly node or intermediate node in this search process also not by
It searched for, then to the radical formula searching request of node or intermediate node diffusion comprising the task of being commissioned accordingly, and was receiving
The confidence level for node of being commissioned is assessed after to response；
The commission node filters out highest be commissioned node of the node as execution task of being commissioned of confidence level, and issues commission and ask
It asks；Later, according to the task execution situation for node of being commissioned, to node and/or intermediate node one confidence of imparting of being commissioned accordingly
Degree, while updating itself recommendation list.
2. a kind of Internet of Things resource search method according to claim 1, which is characterized in that
If the node of being commissioned receives the conservative searching request comprising the task, corresponding response is issued；If received
The radical formula searching request of corresponding portion core attribute in comprising the task then waits a preset time T, also, pre-
If in time T, also receiving the radical formula searching request that different paths are sent, and these requests cover the institute of pending task
There is core attribute, then issues corresponding response；
If having received commission request, corresponding task is executed, and return to task action result.
3. a kind of Internet of Things resource search method according to claim 1, which is characterized in that
If node of being commissioned executed some tasks, and the core attribute of these tasks meets the task that commission node needs to complete
In all core attributes, then it is assumed that node of being commissioned can complete the task；
If node of being commissioned executed some tasks, and the core attribute of these tasks meets the task that commission node needs to complete
In part core attribute, then it is assumed that node of being commissioned can complete part core attribute in the task.
4. a kind of Internet of Things resource search method according to claim 1, which is characterized in that it is described upon receiving the response
The be commissioned confidence level of node of assessment includes:
The confidence level for not entrusting task type for node of being accordingly commissioned is assessed after the response for receiving node return of being commissioned；
Alternatively, recommending setting for task according to intermediate node after receiving the response of node return of being commissioned of intermediate node forwarding
The confidence level for not entrusting task type of the corresponding node of being commissioned of reliability assessment.
5. a kind of Internet of Things resource search method according to claim 1-4, which is characterized in that if described include
The task of dry core attribute includes:
The total task constituted with aggregate form, and each essential attribute is core attribute in the set.
6. a kind of Internet of Things resource search method characterized by comprising
When the conservative search comprising task that intermediate node receives intermediate node forwarding that commission node is sent or upper is asked
When asking, intermediate node inquires the recommendation list of itself according to scheduled query strategy；If inquiring can complete in the task
The node of being commissioned of all core attributes, or recommended to complete the next of the node of being commissioned of all core attributes in the task
Intermediate node, and be commissioned node accordingly or next intermediate node is not searched also in this search process, then to phase
Answer be commissioned node perhaps conservative searching request of the next intermediate node diffusion comprising task and receive be commissioned node or
The confidence level for node of being commissioned is assessed after the response of next intermediate node, then a upward node or commission node issue response；
When intermediate node receives the radical formula search comprising task of intermediate node forwarding that commission node is sent or upper
When request, intermediate node inquires the recommendation list of itself according to scheduled query strategy；If the task can be completed by inquiring
The node of being commissioned of middle part core attribute, or recommended to complete part core attribute in the task and be commissioned the next of node
Intermediate node, and be commissioned node accordingly or next intermediate node is not searched also in this search process, then to phase
Answer be commissioned node or next intermediate node diffusion include task radical formula searching request, and receive be commissioned node or
The confidence level for node of being commissioned is assessed after the response of the lower intermediate node of person, then a upward node or commission node issue response；
Later, intermediate node entrusts node and/or next intermediate node to corresponding according to the task execution situation for node of being commissioned
A confidence level is assigned, while updating itself recommendation list.
7. a kind of Internet of Things resource search method according to claim 6, which is characterized in that
If node of being commissioned executed some tasks, and the core attribute of these tasks meets the task that commission node needs to complete
In all core attributes, then it is assumed that node of being commissioned can complete the task；
If node of being commissioned executed some tasks, and the core attribute of these tasks meets the task that commission node needs to complete
In part core attribute, then it is assumed that node of being commissioned can complete part core attribute in the task.
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| CN101626336A (en) * | 2008-07-09 | 2010-01-13 | 同济大学 | Method for improving P2P overlay network interaction performance by using trust mechanism |
| US9443204B2 (en) * | 2013-02-05 | 2016-09-13 | Cisco Technology, Inc. | Distributed architecture for machine learning based computation using a decision control point |
| US9292832B2 (en) * | 2013-02-25 | 2016-03-22 | Qualcomm Incorporated | Collaborative intelligence and decision-making in an IoT device group |
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