CN103260194A - Wireless sensor distributary system based on cloud computing - Google Patents
Wireless sensor distributary system based on cloud computing Download PDFInfo
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Abstract
The invention discloses a wireless sensor distributary system based on cloud computing. A sensor node comprises an equipment auxiliary module, wherein the equipment auxiliary module is used for judging whether local resources lack or not, if the local resources lack, tasks are prepared for conducting distributary to surrounding service mobile equipment, and the mobile equipment comprises a cloud virtual machine module and a middle part module. The cloud virtual machine module searches for resources of the mobile equipment surrounding the sensor node, the resources are arranged according to the idle-and-busy degree, the sensor node selects suitable mobile equipment to conduct service according to self needs, and the mobile equipment forms a mobile cloud environment. After the sensor node selects the mobile equipment, the middle part module conducts distributary on the tasks to the selected mobile equipment to conduct processing, after the tasks are completed, the mobile equipment returns to a task result, and the used mobile equipment is released to a cloud virtual machine. With the wireless sensor distributary system, the sensor node can conduct distributary on the tasks to the surrounding mobile equipment of the sensor node, and the tasks which need completing can be completed through the mobile equipment.
Description
Technical field
The present invention relates to a kind of wireless senser separate system based on cloud computing.In other words, the mobile device with cloud computing is formed cloud computing platform, the system that wireless sensor network is shunted.
Background technology
Wireless sensor network (WSN) wireless network that to be a large amount of static or mobile transducers constitute in the mode of self-organizing and multi-hop, its objective is that perception collaboratively, collection, processing and transmission network cover the monitoring information of perceptive object in the geographic area, and report to server.A large amount of sensor nodes have sent to server by aggregation node through other network with detection data.Compare traditional wireless sensor network, present wireless sensor network application is wider.In military affairs, traffic, the public security field, sensor node not only will detect the information as video, audio stream, rest image and ambient sensors node, and the performance of network is had higher requirement (for example, postponing data processing speed, bandwidth etc.).Yet in fact traditional sensor node is made up of the processing unit of limited computational power and limited memory usually, is difficult to reach these requirements.
Mobile device becomes the convenience of human routine work and life and the part of effective tool of communications just day by day.Today, mobile device has been widely used in people's the life, all has been equipped with one or more mobile devices most of people of most countries.The mobile device that geographically closes on can be formed mobile ad-hoc network (MANET), mobile device at MANET has cloud computing abilities such as camera, wireless access, mobility, computing capability, video demonstration, electronic equipment (such as transducer) information around can collecting, by as Wi-Fi, bluetooth, wireless technologys such as ZigBee transmit this information.
Cloud computing is a kind of novel IT resource delivery mode, it by virtual wait technique construction one have the resource pool (comprising computational resource, storage resources, software, network etc.) of omnipotence In the view of the user, and can provide various resources according to user's demand flexibly; The user is by network insertion and use the resource at cloud computing center.From the angle of cloud service provider, by between a large number of users, sharing the hardware and software resource, can improve resource utilization, reduce energy resource consumption; From user's angle, use cloud service then to save the information technoloy equipment of purchasing and safeguarding costliness but use poor efficiency, only need to pay at cloud computing center on-demand application resource requirement and by use amount, saved time cost and Financial cost.Cloud computing has just obtained extensive concern and has obtained increasing the application once proposition.
Be applied to provide mobile service with cloud computing, increase the ability of intelligent terminal with the resource at cloud computing center, i.e. mobile cloud computing, be a solution of alleviating the mobile terminal resource demand contradictory: terminal is used in the cloud computing in the heart resource by network remote, part or all of computing is moved into the cloud from terminal, terminal only needs process user input and a few calculations, is shown to the user after operation result (comprising long-range cloud computing result and local result of calculation) being integrated at last again.
Expectation will be widely used in wireless sensor network or other many fields based on the mobile device of cloud computing within several years.Therefore, research has very wide prospect based on the mobile device of cloud computing in the wireless sensor network shunting.
In traditional wireless sensor network, mainly there are following 3 problems.
Problem 1, disposal ability are limited.Sensor node will send a large amount of sensing datas and handle to background server, and this may cause communications cost to increase the weight of and prolong the response time.For example, when the environment around a sensor node detects it changed, it need be sent to background server with data with considerable time, and it may not have enough spaces to store the mass data that will transmit.Also have, when taking place as fire, during the such emergency of earthquake, the data that sensor node is collected sharply increase suddenly, serve it as these data are sent to the backstage, just may cause the WSN Radio Link congested with the performance reduction.
Problem 2. sensor nodes are limited energy and damage easily normally.Sensor node uses as the router of other ambient sensors nodes, will cause its shorter battery life, impairs availability and the robustness of wireless sensor network.
Deployment and the maintenance of problem 3. sensor nodes and wireless sensor network are expensive.
List of references [1-3] mainly is to improve Routing Protocol, and the wireless sensor network of prior art mostly concentrates on the improvement of MAC layer.
List of references [4] has proposed the mobile agent based on wireless sensor network.This solution need be moved mobile code at sensor node, only with alleviation problem 1, but does not have the other problems that solves.
List of references [5] has proposed the mobility of wireless sensor network, transmits data to background server by mobile device.Here the mobile device that adopts comes the collecting sensor data mainly as a relay layer.This solution may alleviate problem 2, but does not have the other problems of solution.
In general, up to the present, also do not support wireless sensor network as a platform of shunting based on the mobile device of cloud computing.
[1]Ian?F.Akyildiz，Tommaso?Melodia，Kaushik?R.Chowdhury.A?survey?on?wireless?multimedia?sensor?networks.IEEE?Computer?Networks.2007
[2]Cristina?Cano，Boris?Bellalta，Jaume?Barcelóand?Anna?Sfairopoulou.A?Novel?MAC?Protocol?for?Event-Based?Wireless?Sensor?Networks：Improving?the?Collective?QoS.Wired/wireless?Internet?Communications.2009.
[3]Ana-Belén?García-Hernando，José-Fernán?Martínez-Ortega，Juan-Manuel?López-Navarro，Aggeliki?Prayatiand?Luis?Redondo-López.Network?Aspects?and?Deployment?in?WSNs.Book?chapter.PROBLEM?SOLVING?FOR?WIRELESS?SENSOR?NETWORKS.2008
[4]Min?Chen，Taekyoung?Kwon，Yong?Yuan，and?Victor?C.M.Leung.Mobi?le?Agent?Based?Wireless?Sensor?Networks.Journal?of?computers.2006
[5]Munir，S.A.；Biao?Ren；Weiwei?Jiao；Bin?Wang；Dongl?iang?Xie；Man?Ma.Mobile?Wireless?Sensor?Network：Architecture?and?Enabling?Technologies?for?Ubiquitous?Computing.IEEE?AINAW2007.
Summary of the invention
The present invention is directed to popular cloud computing technology at present, propose the shunting that a kind of mobile device based on cloud computing is supported wireless sensor network.
Technical scheme of the present invention is as follows:
A kind of wireless senser separate system based on cloud computing comprises the equipment supplementary module on the sensor node, the equipment supplementary module is used for judging whether local resource lacks, if prepare task is shunted to the mobile device of serving on every side; Mobile device comprises cloud virtual machine module and middleware module; Cloud virtual machine module is searched the sensor node resource of all mobile devices on every side, and these resources are arranged according to busy degree of spare time, and sensor node selects suitable mobile device to serve according to the demand of oneself, and these mobile devices form mobile cloud environment; After sensor node chose mobile device, middleware module was shunted task to selected mobile device and is handled, and after task is finished, returns task result, and employed mobile device is discharged back again in the cloud virtual machine.
Described wireless senser separate system, equipment supplementary module comprise 4 unit: the local resource that resouce controller unit monitors sensor node can be used reports to the task management module to these information simultaneously; Executing the task and optimize performance in the task management unit, lacks if find local resource, and the task management unit begins to search sensor node available mobile device on every side, and all mobile devices that can serve are in wait state; The information that data communication units provides according to the task management unit is selected suitable mobile device, allows mobile device replace sensor node to communicate then, sign off, and result of communication returned to sensor node; Discharge employed mobile device simultaneously; Safe unit is used for guaranteeing the communication security between sensor node and the mobile device.
Described wireless senser separate system, cloud virtual machine module comprise rm-cell, safety management unit and mobile cloud environment unit; The mobile device resource of rm-cell managing virtual; The safety management unit provides the security mechanism of mobile cloud environment; Can virtual mobile device resource and running environment is provided in mobile cloud environment unit; Middleware module comprises task management unit, environmental management unit and task executing units.Contact is set up for the treatment of the sensor node task and with other sensor nodes in the task management unit; The environmental management unit connects and the environment of tracking transducer node with sensor node; Task executing units is used for carrying out the sensor node task.
The present invention is applicable to wireless sensor network or the Internet of Things with mobile device.Under the environment that has sensor node and mobile device to dispose, the mobile device group in the sensor network is invented a mobile cloud environment, and all mobile devices possesses the cloud computing ability.All sensor nodes can be shared the mobile device resource under the virtual cloud environment, sensor node not only can be enjoyed the service that one or more mobile device around its provides, and can enjoy the service that cloud environment that the mobile device around its forms provides.Sensor node can task be diverted to around it mobile device on, finish its required finishing of task by mobile device.Can alleviate 3 problems above-mentioned like this.
Description of drawings
Fig. 1 is traditional wireless sensor network structure chart;
Fig. 2 is the wireless sensor network structure chart based on cloud computing of the present invention;
Fig. 3 is the module that sensor node of the present invention and mobile device newly increase;
Fig. 4 is the equipment supplementary module logic diagram in the sensor node of the present invention;
Fig. 5 is mobile device logic diagram of the present invention;
Fig. 6 is that sensor node of the present invention is shunted the process to the mobile device task;
Fig. 7 is state transition graph between sensor node of the present invention and mobile device;
Embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.
Fig. 1 is traditional wireless sensor network structure chart.Generally have only sensor node and aggregation node two classes, the task of all the sensors node all is to transmit by aggregation node.
Fig. 2 is the wireless sensor network structure chart based on cloud computing of the present invention.The mobile device (the star-like node among Fig. 2) that is distributed in the wireless sensor network is invented a mobile cloud environment, and all mobile devices possesses the cloud computing ability.In this case, sensor node does not re-use aggregation node and transmits data to server, but serves by the mobile device under the cloud environment.Here it is is diverted to the task of sensor node on its mobile device on every side, finishes its required finishing of task by mobile device, can reduce the pressure of aggregation node.
The module that Fig. 3 newly increases on sensor node and mobile device for the present invention; Shunting work is finished in the collaborative work of getting up of these module combinations.Increased the equipment supplementary module at sensor node, the equipment supplementary module is used for judging whether local resource lacks, if prepare task is shunted to the mobile device of serving on every side.And increased cloud virtual machine module and middleware module at mobile device.Cloud virtual machine module is searched the sensor node resource of all mobile devices on every side, these resources are arranged according to busy degree of certain spare time, sensor node selects suitable mobile device to serve according to the demand of oneself, and these mobile devices form mobile cloud environment; After sensor node chose mobile device, middleware module was shunted task to selected mobile device and is handled, and after task is finished, returns task result, and employed mobile device is discharged back again in the cloud virtual machine.
Fig. 4 describes the groundwork of the equipment supplementary module in the sensor node in detail.The equipment supplementary module is divided into 4 unit: the local resource that resouce controller unit monitors sensor node can be used reports to the task management module to these information simultaneously; Executing the task and optimize performance in the task management unit, lacks if find local resource, and the task management unit begins to search sensor node available mobile device on every side, and all mobile devices that can serve are in wait state; The information that data communication units provides according to the task management unit is selected suitable mobile device, allows mobile device replace sensor node to communicate then, sign off, and result of communication returned to sensor node.Discharge employed mobile device simultaneously; Safe unit is used for guaranteeing the communication security between sensor node and the mobile device.
Fig. 5 is that mobile device has increased 2 modules, mainly contains cloud virtual machine module and middleware module.
Cloud virtual machine module comprises rm-cell, safety management unit and mobile cloud environment unit.The mobile device resource of rm-cell managing virtual; The safety management unit provides the security mechanism of mobile cloud environment; Can virtual mobile device resource and running environment is provided in mobile cloud environment unit.
Middleware module comprises task management unit, environmental management unit and task executing units.Contact is set up for the treatment of the sensor node task and with other sensor nodes in the task management unit; The environmental management unit connects and the environment of tracking transducer node with sensor node; Task executing units be used for to carry out the sensor node task (as data handle, transfer of data is to background server etc.).
To be sensor node shunt main process to mobile device to task to Fig. 6:
The first step: when sensor node shortage local resource, it can judge whether the shunting task to mobile device on every side, if can shunt, the equipment supplementary module just begins to seek the mobile device of adequate resources on every side.
Second step: all mobile devices that have Service Source in the cloud virtual machine are prepared service, wait for that cloud virtual machine module according to the busy extent of mobile device resource, finds out the mobile device of optimum (suitable), wait for that then the mobile device of selecting replys.
The 3rd step: mobile device provides replys, and informs that sensor node can share the resource of mobile device, and this mobile device of mark is in busy condition in cloud virtual machine module.
The 4th step: whether the sensor node inspection determines is connected on the mobile device, if determine to connect, just sends connection request and connects.
The 5th step: mobile device confirms sensor node, and confirms to connect.
The 6th step: sensor node sends to selected mobile device to task, waits for that the middleware module of mobile device is carried out task execution function.
The 7th step: the middleware module startup by mobile device is executed the task, and task result is returned to sensor node.
The 8th step: this subtask finishes, and the service that disconnects this mobile device and the sensor node of its service is connected, and discharges the resource of this mobile device, turns back in the cloud resource pool, waits for the service of next time.
Here, sensor node can connect with its a plurality of mobile device on every side if desired.Simultaneously, a mobile device also can be a plurality of sensor node services.
Fig. 7 describes the state transition graph between sensor node and the mobile device in detail.Just begin, sensor node is in the state of not shunting, and shunting is in closed condition.If under the situation that its local resource lacks, shunting is in standby condition, can find suitable mobile device and successful connection for the mobile device of its service around it just begins to search, and divides stream mode for opening, and then task is shunted to mobile device; Get nowhere if connect, just turn back to the shunting standby condition; If there is not task to be shunted, shunting is in halted state; When new task, shunting turns back to opening; Be disconnected when mobile device connects, shunting turns back to standby condition so; Resource when sensor node this locality is resumed, and shunting turns back to closed condition so.
The present invention has the following advantages:
Reaction speed is fast: mobile cloud environment is very rapid for various state responses, and its resource ratio sensor node is abundant, can be better, the task of processes sensor node faster.
Communications cost is low: sensor node is shunted task to mobile device, has just reduced the communications cost of sensor network.
Energy resource consumption is low: sensor node does not move a large amount of tasks, does not serve as the router feature of other sensor nodes simultaneously yet, can energy savings consumption.
Robustness is strengthened: if network congestion of sensor, sensor node can be shunted data service to mobile device on every side, and is this service platform of mobile cloud environment as sensor network, improved the robustness of sensor network.
The cost of disposing and safeguarding is low: by energy savings and enhancing robustness, mobile cloud environment has reduced deployment and the maintenance cost of sensor network.
Should be understood that, for those of ordinary skills, can be improved according to the above description or conversion, and all these improvement and conversion all should belong to the protection range of claims of the present invention.
Claims (3)
1. wireless senser separate system based on cloud computing, it is characterized in that, comprise the equipment supplementary module on the sensor node, the equipment supplementary module is used for judging whether local resource lacks, if prepare task is shunted to the mobile device of serving on every side; Mobile device comprises cloud virtual machine module and middleware module; Cloud virtual machine module is searched the sensor node resource of all mobile devices on every side, and these resources are arranged according to busy degree of spare time, and sensor node selects suitable mobile device to serve according to the demand of oneself, and these mobile devices form mobile cloud environment; After sensor node chose mobile device, middleware module was shunted task to selected mobile device and is handled, and after task is finished, returns task result, and employed mobile device is discharged back again in the cloud virtual machine.
2. wireless senser separate system according to claim 1 is characterized in that, the equipment supplementary module comprises 4 unit: the local resource that resouce controller unit monitors sensor node can be used reports to the task management module to these information simultaneously; Executing the task and optimize performance in the task management unit, lacks if find local resource, and the task management unit begins to search sensor node available mobile device on every side, and all mobile devices that can serve are in wait state; The information that data communication units provides according to the task management unit is selected suitable mobile device, allows mobile device replace sensor node to communicate then, sign off, and result of communication returned to sensor node; Discharge employed mobile device simultaneously; Safe unit is used for guaranteeing the communication security between sensor node and the mobile device.
3. wireless senser separate system according to claim 1 is characterized in that, cloud virtual machine module comprises rm-cell, safety management unit and mobile cloud environment unit; The mobile device resource of rm-cell managing virtual; The safety management unit provides the security mechanism of mobile cloud environment; Can virtual mobile device resource and running environment is provided in mobile cloud environment unit; Middleware module comprises task management unit, environmental management unit and task executing units.Contact is set up for the treatment of the sensor node task and with other sensor nodes in the task management unit; The environmental management unit connects and the environment of tracking transducer node with sensor node; Task executing units is used for carrying out the sensor node task.
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