CN101364951A - QoS guarantee system for wireless sensor network - Google Patents
QoS guarantee system for wireless sensor network Download PDFInfo
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- CN101364951A CN101364951A CNA2008102233763A CN200810223376A CN101364951A CN 101364951 A CN101364951 A CN 101364951A CN A2008102233763 A CNA2008102233763 A CN A2008102233763A CN 200810223376 A CN200810223376 A CN 200810223376A CN 101364951 A CN101364951 A CN 101364951A
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Abstract
The invention relates to a service quality assurance system for a wireless sensor network. The service quality assurance system comprises a wireless sensor network, a user control server communicating and interacting with the wireless sensor network and a service quality assurance platform for implementing control and management to the network service quality. The service quality assurance platform is provided with three functional modules of service quality assessment, service quality control and service quality management, and a network interface and a human-computer interaction interface which connected with the wireless sensor network. The structure of the service quality assurance platform is simple, the platform is easy to realize and convenient for control, various performance parameters influencing the network service quality of the wireless sensor network are analyzed through the current service quality assessment system, the key factors are searched out, and the motion of the sensor network and the nodes is further controlled and adjusted. The service quality assurance system not only can be used for online assessment to the service quality of the wireless sensor network, but also can be used for the verification and the improvement of the protocol algorithm of the future wireless sensor network, thereby having very good promotion and application prospect.
Description
Technical field
The present invention relates to a kind of QoS safeguards technique of network system, exactly, relate to a kind of QoS guarantee system of wireless sensor network, belong to wireless self-organization network systems technology field.
Background technology
Wireless sensor network is a Military Application and at first initiate research by the DARPA of ARPA, and is evaluated as the great technological breakthrough of the U.S. by House Science Committee in September, 1998.In order to guarantee the superiority of the U.S. in this advanced technology field, DARPA and the NSF of U.S. natural science fund committee have successively formulated medium-term and long-term research and development plan.The theory of China's wireless sensor network and the starting of algorithm research are more late at least 3 years than developed country, but since 2002, guiding by state natural sciences fund, started the climax of a theoretical research at home, especially under the guiding of CNGI project guide in 2005, domestic research enthusiasm to wireless sensor network is unprecedentedly surging.Wireless sensor network has become one of research focus of network service and field of information processing at present, and is just stepping into the upward period of a high speed development, and the mechanism of nearly all university and relevant enterprise all puts into research and development in the works with it.
Along with deepening continuously of wireless sensor network theoretical research and practical application, people propose more and more higher quality of service requirement to wireless sensor network.But, wireless sensor network itself intrinsic complexity and people provide the factors such as multifarious different demands of service to wireless sensor network, all making provides the correlation technique of service quality guarantee to propose new challenge in wireless sensor network.
At present, system research to wireless sensor network service quality guarantee technology is also fewer, the thinking of great majority research is still the achievement in research of using for reference traditional the Internet, still rest in the simple improvement procotol and algorithm, its evaluation index is also continued to use the metric attribute of legacy network mostly, for example time delay, shake, packet loss, throughput, fairness etc., this method not only causes the portability of system poor, cause the service quality guarantee Study on Technology to be in a kind of state that isolates, lack systematized solution; And, causing the actual performance deterioration of theoretical research result inevitably, can't satisfy network performance and the higher demand of quality of service requirement.
Therefore, as the safeguards technique of the service quality of a brand-new research topic-wireless sensor network, domestic and international research all also is in the starting stage basically.The progress of the present this respect of following brief description:
(1) wireless sensor network (WSN) emulation system: the meaning of Computer Simulation is the operation by the artificial antenna sensor network, and information such as phase-split network agreement and node configuration are to the support of network service quality.Main wireless sensor network (WSN) emulation platform has at present: the J-Sim (former title JavaSim) that Ohio State University and illinois university are developed jointly, the EWSNSim of Holland Twente university exploitation, the Mannasim of Brazil UFMG university exploitation, the WSNSim of industrial control technology National Key Laboratory of Zhejiang University exploitation and the Tossim of U.S. Crossbow company etc.Wherein Tossim, EWSNSim are the wireless sensor network systems at special use, and other then are some general-purpose platforms.
These emulation platforms are on network simulator (NS-2 or OMNet++) basis the emulation of sensor network to be expanded, or utilize Java or C# language that emulation platform is rewritten.They have realized the modeling and simulation to some agreements of sensor network, and allow the user to use script or programming that emulation platform is expanded.But, they all do not consider the characteristics of the distinctive application correlation of wireless sensor network, the main purpose of its emulation is still pays close attention between the node measuring object such as network transfer delay, bandwidth end to end, and QoS parameter is carried out essence description.
(2) wireless sensor network management system: the wireless sensor network management system also is that present people pay close attention to one of less relatively field.Wherein, the SensorNet project that the Brazilian development in science and technology committee subsidizes has proposed a kind of wireless sensor network Governance framework, mainly is made of management level, management function zone and three management views of administration functionality.Computer institute of NUS wireless sensor network group has also proposed the wireless sensor network management architecture and the framework of its definition, think to define a general wireless sensor network management architecture and a framework, must comprise the internality and the externalism of wireless sensor network: internality is mainly concerned with the management of data collection, Data Control, data monitoring; Externalism mainly considers to manage the wireless sensor network of isomery, also will set up the external wireless sensor network Governance framework of a compatible Simple Network Management Protocol (SNMP) simultaneously.
Above-mentioned these achievements in research have proposed the architecture of wireless sensor network management and the management function of finishing thereof, but its groundwork has mostly just proposed the Frame Design of management system, and be not one really can practical application platform, and further do not provide its due network control function.
In sum, wireless sensor network service quality guarantee Study on Technology helps to promote the performance of network, and further promotes the practical application of wireless network.But the research in wireless sensor network service quality field at present still is in the starting stage, and great majority research thinking is still the achievement in research of continuing to use legacy network, still rests in the simple repairing to procotol and algorithm, lacks systematized solution.
Summary of the invention
In view of this, the QoS guarantee system that the purpose of this invention is to provide a kind of wireless sensor network, this system can solve the number of drawbacks and the limitation of prior art preferably, rely on the software function module of the wireless sensor network service quality guarantee platform in this system, realized to innovation actual measurement to network performance parameter, obtain the real network information, according to the service quality assessment system procotol is estimated again, and provide the foundation of further optimal control agreement; In addition, this platform not only can obtain network performance parameter by measuring, and the self-adaptive service quality administrative mechanism of a cover based on feedback mechanism is provided, thereby can guarantee the service quality of wireless sensor network more effectively.
In order to achieve the above object, the invention provides a kind of QoS guarantee system of wireless sensor network, comprise: be distributed in the wireless sensor network of a plurality of wireless sensor nodes compositions of setting place or space, utilize IP network or other communication network and described wireless sensor network to communicate mutual user's Control Server; It is characterized in that:
This system also is provided with: adopt wireless or wired mode and wireless sensor network to communicate alternately, implement the service quality guarantee platform of network service quality control and management, this service quality guarantee platform is provided with service quality assessment, service quality control, three software function modules of Service Quality Management and network interface that is connected described wireless sensor network and Man Machine Interface; Wherein:
The Service Quality Management module adopts passive/network measure method initiatively to obtain the actual performance parameter of wireless sensor network, for service quality assessment module simulation rehearsal network performance and as the basis of assessing;
The service quality assessment module, control centre as this service quality guarantee platform, its function is the actual performance parameter of measuring according to wireless sensor network, by in-circuit emulation and rehearsal and real-time judge current wireless performance of sensor networks, and assess the QoS requirement that can this wireless sensor network satisfy current application; If can not meet the demands, then according to the mapping relations between QoS parameter and the network performance parameter, the key factor of decision influence service quality, and form the tentative programme that network is adjusted, be submitted to the service quality control module;
The service quality control module, be used for service quality is write down, manages and the strategy adjustment: according to the tentative programme of assessment result and network adjustment, after selecting the tactful and corresponding Control Parameter of corresponding adjustment, be transferred to wireless sensor node adjusting parameters remote by network interface;
The network interface that connects wireless sensor network, comprise network performance parameter input interface and network control parameter output interface, be respectively applied for the monitoring and the statistics that each wireless sensor node are realized the Internet resources behaviour in service, and to the control and the adjustment of this wireless sensor network resource;
Man Machine Interface is used for the network management personnel service quality of this wireless sensor network is monitored, controls and manages.
Described service quality assessment module is provided with three functional units: network analog rehearsal unit, application generation unit and QoS parameter and network parameter map unit, and three interfaces: network performance parameter receiving interface, network control parameter transmission interface and Man Machine Interface, wherein:
Use generation unit, be used to generate and comprise that each quasi-representative that event-driven, query driven, Continuous Flow are used uses, and the QoS parameter of every class application requirements, and will generate the result and be input to network analog as application source and drill in the unit;
QoS parameter and network parameter map unit are used to set up the Mathematical Modeling of corresponding relation between these two parameters, when certain QoS parameter is subjected to influencing of multinomial network parameter, distribute corresponding different weights for respectively these network parameters; This map unit is input to the mapping result between these two parameters in the network analog rehearsal unit, as judging whether wireless sensor network satisfies the foundation of application service quality requirement;
Network analog rehearsal unit, core as this evaluation module, this unit is by the actual measurement network performance parameter of network performance parameter receiving interface reception from the Service Quality Management module, with the operation of simulated maneuver wireless sensor network, and judge that according to the corresponding relation between QoS parameter and the network performance parameter can network satisfy the application quality requirement; If can not meet the demands, the network control parameter that the then network performance parameter of the key factor of this module decision influence service quality, and generation is used to adjust is delivered to the service quality control module by network control parameter transmission interface with these Control Parameter again.
Described network analog rehearsal unit be one carry out corresponding modify based on the NS-2 network simulator, to adapt to the open general-purpose platform that wireless sensor network is core with data, this unit not only can be as the foundation that the communication protocol that is deployed in the wireless sensor network is adjusted, can also be as the test envelope of all kinds of network communication of wireless sensor protocol capabilities of checking, so that can find the pluses and minuses of existing protocol faster, more realistically, make improvements targetedly.
Described service quality control module is provided with network control policy unit and three interfaces: network control parameter receiving interface, network are adjusted parameter output interface and Man Machine Interface, the network control parameter that the network control policy unit is sent according to evaluation module, after handling by the corresponding control strategy of Man Machine Interface input, the network adjustment parameter of generation outputs to each sensor node by the network interface of platform.
It is the adjustment parameter that adjusts accordingly at the sensor node in certain sensor node of setting, certain set or all sensors node respectively that the network that described network control policy unit produces is adjusted parameter, and this network is adjusted parameter and comprised following content:
The work period of node, by the sensor node work period being shortened or prolonging, change the energy consumption speed of sensor node, thereby change the coverage of wireless sensor network, and adjust the time delay that the transducer dateout arrives the transducer gateway;
The transmitting power of node is used for initiatively changing the degree of mobility of network, and then changes the topological structure of wireless sensor network, and forces sensor node to reselect bang path, makes network realize load balancing;
The data distribution policy is used for the outstanding high parameter of sensor node routing service quality weights, thereby guarantees that these data parameters have high relative importance value in the sensor node routing procedure;
Node sends data frequency, is used to adjust sensor node and sends the quantity of data and the time delay between each data, to satisfy different application demands;
The space of node buffering area is by changing the space size of sensor node buffering area, to avoid factor according to congested and probability that lost;
The data gathering strategy of node is used for the energy and the aggregation strategy that are consumed when the data joint is adjusted data gathering, the energy expense requirement when satisfying that correlation data is assembled in the network.
Described network control policy unit is to adopt to comprise that online programming, system image are downloaded or based on agency's adjustment mode sensor node is realized dynamically adjusting.
Described Service Quality Management module is provided with two functional units: network performance parameter measuring unit and network performance parameter database, and three interfaces: network performance parameter receiving interface, network performance parameter transmission interface and Man Machine Interface, wherein:
The network performance parameter measuring unit, be used for requirement according to the service quality guarantee platform, gather size, transmission radius and the wireless sensor network of locating information and the performance parameter of node between the dump energy comprise network topology, current routing policy, average link time delay, node, buffer empty according to the variable cycle, and the information storage that will gather is in the network performance parameter database;
The network performance parameter database is used for the wireless sensor network that storage networking performance parameter measuring unit sends and the performance parameter of node, for the inquiry of service quality assessment module;
Man Machine Interface to the visualized management window that the user provides, is used for intuitively showing the various information of the relevant parameter that comprises topological structure, average energy, each node of current wireless sensor network as this Service Quality Management module.
Described Service Quality Management module further comprises following function: by the angle of macroscopical wireless sensor network system and each sensor node of microcosmic, adopt visual means to show the various different conditions of current network and node; Can Measurement Network, the information in node and path, and in measuring process, can obtain needed data fast by content-based filter; And have autgmentability and versatility, this Service Quality Management module can expanded application in the various kinds of sensors network, and be applicable to various sensor node type.
The innovation point of the QoS guarantee system of wireless sensor network of the present invention is the wireless sensor network service quality guarantee platform that proposes and developed a structural integrity, this platform structure is simple, be easy to realize, be convenient to control, it is based on the real network performance parameter that actual measurement obtains, by defined service quality assessment system the various performance parameters of wireless sensor network are analyzed the degree of protection of service quality, draw the principal element that influences network service quality, and then the behavior of wireless sensor network and sensor node is controlled and adjusted.This QoS guarantee system not only can be used for the service quality of wireless sensor network is carried out online evaluation, also can have good popularization and application prospect as the checking and the improvement of following emerging wireless sensor network protocols algorithm.
Description of drawings
Fig. 1 is that the structure of the QoS guarantee system of wireless sensor network of the present invention is formed schematic diagram.
Fig. 2 is that service quality assessment inside modules functional unit is formed configuration diagram.
Fig. 3 is that configuration diagram is formed in service quality control module built-in function unit.
Fig. 4 is that Service Quality Management inside modules functional unit is formed configuration diagram.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
Referring to Fig. 1, introduce the composition structure of the QoS guarantee system of wireless sensor network of the present invention, this system comprises: the wireless sensor network that is distributed in a plurality of wireless sensor nodes compositions of setting place or space, utilize IP network or other communication network and described wireless sensor network to communicate mutual user's Control Server, and the service quality guarantee platform of innovative design; This support general wireless sensor network service qualitys of using ensure that platform is the demand that guarantees according to service quality more, adopt wireless or wired mode and wireless sensor network to communicate alternately, wireless sensor network is implemented the equipment of network service quality assessment, control and management.This service quality guarantee platform is provided with three software function modules: service quality assessment module, service quality control module and service quality management module, and the network interface and the Man Machine Interface that connect wireless sensor network, the operation of maintenance and management oneself automatically.Wherein:
The Service Quality Management module adopts passive/network measure method initiatively to obtain the actual performance parameter of wireless sensor network, for service quality assessment module simulation rehearsal network performance and as the basis of assessing;
The service quality assessment module, control centre as this service quality guarantee platform, its function is the actual performance parameter of measuring according to from the wireless sensor network of Service Quality Management module, by in-circuit emulation and rehearsal and real-time judge current wireless performance of sensor networks, and assess the QoS requirement that can this wireless sensor network satisfy current application; If can not meet the demands, then according to the mapping relations between QoS parameter and the network performance parameter, the key factor of decision influence service quality, and form the tentative programme that network is adjusted, be submitted to the service quality control module;
The service quality control module, be used for service quality is write down, manages and the strategy adjustment: according to the assessment result of evaluation module output and the tentative programme of network adjustment, after selecting corresponding network to adjust tactful and corresponding Control Parameter, by network interface network is adjusted parameters remote and be transferred to wireless sensor node;
The network interface that connects wireless sensor network, comprise network performance parameter input interface and network control parameter output interface, be respectively applied for the monitoring and the statistics that each wireless sensor node are realized the Internet resources behaviour in service, and to the control and the adjustment of this wireless sensor network resource;
Man Machine Interface is used for the network management personnel service quality of this wireless sensor network is monitored, controls and manages.
Following mask body is introduced the structure of each functional module of service quality guarantee platform in the system of the present invention and is formed:
Referring to Fig. 2, introduce three functional units in the service quality assessment module: network analog rehearsal unit, application generation unit and QoS parameter and network parameter map unit, and three interfaces: network performance parameter receiving interface, network control parameter transmission interface and Man Machine Interface, wherein:
Use generation unit and be used to generate each quasi-representative and use, comprise event-driven, query driven, Continuous Flow application etc., and the QoS parameter of every class application requirements, and will generate the result and be input to network analog as application source and drill in the unit.
QoS parameter and network parameter map unit are used to set up the Mathematical Modeling of direct corresponding relation between these two parameters, when certain QoS parameter is subjected to influencing of multinomial network parameter, distribute corresponding different weights for respectively these network parameters, promptly this Mathematical Modeling is a nonlinear model.This map unit is input to the mapping result between these two parameters in the network analog rehearsal unit, as judging whether wireless sensor network satisfies the foundation of application service quality requirement.
Network analog rehearsal unit is the core of service quality assessment module, this unit is by the actual measurement network performance parameter of network performance parameter receiving interface reception from the Service Quality Management module, with the operation of simulated maneuver wireless sensor network, and judge that according to the corresponding relation between QoS parameter and the network performance parameter can network satisfy the application quality requirement; If can not meet the demands, the network performance parameter of the key factor of this module decision influence service quality then, and generate and to be used to the network control parameter adjusted accordingly, by network control parameter transmission interface these Control Parameter are delivered to the service quality control module again.
Network analog rehearsal unit be one carry out corresponding modify based on the NS-2 network simulator, to adapt to the open general-purpose platform that wireless sensor network is core with data, this unit not only can be as the foundation that the communication protocol that is deployed in the wireless sensor network is adjusted, can also be as the test envelope of all kinds of network communication of wireless sensor protocol capabilities of checking, so that can find the pluses and minuses of existing protocol faster, more realistically, make improvements targetedly.
Referring to Fig. 3, introduce network control policy unit and three interfaces that the service quality control module is provided with: network control parameter receiving interface, network are adjusted parameter output interface and Man Machine Interface, the network control parameter that the network control policy unit is sent according to the service quality assessment module, after handling by the corresponding control strategy of Man Machine Interface input, the network adjustment parameter of generation outputs to each sensor node by the network interface of platform.
It is the adjustment parameter that adjusts accordingly at the sensor node in certain sensor node of setting, certain set or all sensors node respectively that the network that the network control policy unit produces is adjusted parameter, and this network is adjusted parameter and comprised following particular content:
1. work period of node: by making shortening or the prolongation of sensor node work period, change the energy consumption speed of sensor node, thereby change the coverage of wireless sensor network, and adjust the time delay that the transducer dateout arrives the transducer gateway;
2. the transmitting power of node: be used for initiatively changing the degree of mobility of network, and then change the topological structure of wireless sensor network, and force sensor node to reselect bang path, make network realize load balancing;
3. data distribution policy: be used for the outstanding high parameter of sensor node routing service quality weights, thereby guarantee that these data parameters have high relative importance value in the sensor node routing procedure;
4. node sends data frequency: be used to adjust sensor node and send the quantity of data and the time delay between each data, to satisfy different application demands;
5. the space of node buffering area: by changing the space size of sensor node buffering area, to avoid factor according to congested and probability that lost;
6. the data gathering strategy of node: be used for the energy and the aggregation strategy that when the data joint is adjusted data gathering, are consumed, the energy expense requirement when satisfying that correlation data is assembled in the network.
For each running parameter to sensor node is dynamically adjusted, the network control policy unit is to adopt online programming, system image to download and adjust the sensor node realization is dynamic based on agency's adjustment mode.
Referring to Fig. 4, introduce two functional units that the Service Quality Management module is provided with: network performance parameter measuring unit and network performance parameter database, and three interfaces: network performance parameter receiving interface, network performance parameter transmission interface and Man Machine Interface.
The network performance parameter measuring unit is the requirement according to the service quality guarantee platform, gather the performance parameter of wireless sensor network and node according to the variable cycle, comprise size, transmission radius and locating information etc. between the dump energy, buffer empty of network topology, current routing policy, average link time delay, node, and the information storage that will gather is in the network performance parameter database;
The network performance parameter database is the memory space that is used for the performance parameter of wireless sensor network that storage networking performance parameter measuring unit sends and node, for the inquiry of service quality assessment module;
Man Machine Interface be this Service Quality Management module to the visualized management window that the user provides, be used for intuitively showing the various information of the relevant parameter that comprises topological structure, average energy, each node of current wireless sensor network.
The Service Quality Management module further comprises the following function characteristics:
1. visual: as, to adopt visual means to show the various different conditions of current network and node by the angle of macroscopical wireless sensor network and each sensor node of microcosmic;
2. can measure: can Measurement Network, the information in node and path;
3. filter: can obtain required data fast by content-based filter in the measuring process;
4. universal: this Service Quality Management module energy expanded application is in various kinds of sensors network and various sensor node type;
5. can expand: the Service Quality Management module does not rely on concrete node type.
Service quality guarantee platform in the system of the present invention by the technology of applicant's employing based on the java applet language, has carried out implementing test.Core work wherein is the design and the realization of the network analog rehearsal unit in the service quality assessment module.
This network analog rehearsal unit is to take to realize based on the mode of NS-2 network simulator.The NS-2 network simulator is analog discrete seasonal effect in time series network behavior well, but, because it is the simulator of an end to end network, for this improves it, and Routing Protocol, MAC agreement, convergence algorithm and location algorithms etc. that some are commonly used all are implanted into network analog rehearsal unit, are used to assess the influence to network service quality of these host-host protocols and algorithm.
As everyone knows, the service quality of network finally depends on the design of communication protocol such as route, MAC of network.Therefore the applicant cooperates the application of system of the present invention, also designed a kind of modular Routing Protocol based on mapping relations between QoS parameter and the network parameter, the method that this agreement takes fuzzy logic to judge is predicted the variation tendency of network, adjusts the routing policy of oneself automatically.The test of this agreement and checking all are based on network analog rehearsal unit and test and implement.Experimental result shows that enforcement test of the present invention is successful, and the service quality guarantee platform in the QoS guarantee system of wireless sensor network can be realized goal of the invention and finish the design objective of reservation.
Claims (8)
1, a kind of QoS guarantee system of wireless sensor network, comprise: be distributed in the wireless sensor network of a plurality of wireless sensor nodes compositions of setting place or space, utilize IP network or other communication network and described wireless sensor network to communicate mutual user's Control Server; It is characterized in that:
This system also is provided with: adopt wireless or wired mode and wireless sensor network to communicate alternately, implement the service quality guarantee platform of network service quality control and management, this service quality guarantee platform is provided with service quality assessment, service quality control, three software function modules of Service Quality Management and network interface that is connected described wireless sensor network and Man Machine Interface; Wherein:
The Service Quality Management module adopts passive/network measure method initiatively to obtain the actual performance parameter of wireless sensor network, for service quality assessment module simulation rehearsal network performance and as the basis of assessing;
The service quality assessment module, control centre as this service quality guarantee platform, its function is the actual performance parameter of measuring according to wireless sensor network, by in-circuit emulation and rehearsal and real-time judge current wireless performance of sensor networks, and assess the QoS requirement that can this wireless sensor network satisfy current application; If can not meet the demands, then according to the mapping relations between QoS parameter and the network performance parameter, the key factor of decision influence service quality, and form the tentative programme that network is adjusted, be submitted to the service quality control module;
The service quality control module, be used for service quality is write down, manages and the strategy adjustment: according to the tentative programme of assessment result and network adjustment, after selecting the tactful and corresponding Control Parameter of corresponding adjustment, be transferred to wireless sensor node adjusting parameters remote by network interface;
The network interface that connects wireless sensor network, comprise network performance parameter input interface and network control parameter output interface, be respectively applied for the monitoring and the statistics that each wireless sensor node are realized the Internet resources behaviour in service, and to the control and the adjustment of this wireless sensor network resource;
Man Machine Interface is used for the network management personnel service quality of this wireless sensor network is monitored, controls and manages.
2, system according to claim 1, it is characterized in that: described service quality assessment module is provided with three functional units: network analog rehearsal unit, application generation unit and QoS parameter and network parameter map unit, and three interfaces: network performance parameter receiving interface, network control parameter transmission interface and Man Machine Interface, wherein:
Use generation unit, be used to generate and comprise that each quasi-representative that event-driven, query driven, Continuous Flow are used uses, and the QoS parameter of every class application requirements, and will generate the result and be input to network analog as application source and drill in the unit;
QoS parameter and network parameter map unit are used to set up the Mathematical Modeling of corresponding relation between these two parameters, when certain QoS parameter is subjected to influencing of multinomial network parameter, distribute corresponding different weights for respectively these network parameters; This map unit is input to the mapping result between these two parameters in the network analog rehearsal unit, as judging whether wireless sensor network satisfies the foundation of application service quality requirement;
Network analog rehearsal unit, core as this evaluation module, this unit is by the actual measurement network performance parameter of network performance parameter receiving interface reception from the Service Quality Management module, with the operation of simulated maneuver wireless sensor network, and judge that according to the corresponding relation between QoS parameter and the network performance parameter can network satisfy the application quality requirement; If can not meet the demands, the network control parameter that the then network performance parameter of the key factor of this module decision influence service quality, and generation is used to adjust is delivered to the service quality control module by network control parameter transmission interface with these Control Parameter again.
3, system according to claim 2, it is characterized in that: described network analog rehearsal unit be one carry out corresponding modify based on the NS-2 network simulator, to adapt to the open general-purpose platform that wireless sensor network is core with data, this unit not only can be as the foundation that the communication protocol that is deployed in the wireless sensor network is adjusted, can also be as the test envelope of all kinds of network communication of wireless sensor protocol capabilities of checking, so that can find the pluses and minuses of existing protocol faster, more realistically, make improvements targetedly.
4, system according to claim 1, it is characterized in that: described service quality control module is provided with network control policy unit and three interfaces: network control parameter receiving interface, network are adjusted parameter output interface and Man Machine Interface, the network control parameter that the network control policy unit is sent according to evaluation module, after handling by the corresponding control strategy of Man Machine Interface input, the network adjustment parameter of generation outputs to each sensor node by the network interface of platform.
5, system according to claim 4, it is characterized in that: it is the adjustment parameter that adjusts accordingly at the sensor node in certain sensor node of setting, certain set or all sensors node respectively that the network that described network control policy unit produces is adjusted parameter, and this network is adjusted parameter and comprised following content:
The work period of node, by the sensor node work period being shortened or prolonging, change the energy consumption speed of sensor node, thereby change the coverage of wireless sensor network, and adjust the time delay that the transducer dateout arrives the transducer gateway;
The transmitting power of node is used for initiatively changing the degree of mobility of network, and then changes the topological structure of wireless sensor network, and forces sensor node to reselect bang path, makes network realize load balancing;
The data distribution policy is used for the outstanding high parameter of sensor node routing service quality weights, thereby guarantees that these data parameters have high relative importance value in the sensor node routing procedure;
Node sends data frequency, is used to adjust sensor node and sends the quantity of data and the time delay between each data, to satisfy different application demands;
The space of node buffering area is by changing the space size of sensor node buffering area, to avoid factor according to congested and probability that lost;
The data gathering strategy of node is used for the energy and the aggregation strategy that are consumed when the data joint is adjusted data gathering, the energy expense requirement when satisfying that correlation data is assembled in the network.
6, according to claim 4 or 5 described systems, it is characterized in that: described network control policy unit is to adopt to comprise that online programming, system image are downloaded or based on agency's adjustment mode sensor node is realized dynamically adjusting.
7, system according to claim 1, it is characterized in that: described Service Quality Management module is provided with two functional units: network performance parameter measuring unit and network performance parameter database, and three interfaces: network performance parameter receiving interface, network performance parameter transmission interface and Man Machine Interface, wherein:
The network performance parameter measuring unit, be used for requirement according to the service quality guarantee platform, gather size, transmission radius and the wireless sensor network of locating information and the performance parameter of node between the dump energy comprise network topology, current routing policy, average link time delay, node, buffer empty according to the variable cycle, and the information storage that will gather is in the network performance parameter database;
The network performance parameter database is used for the wireless sensor network that storage networking performance parameter measuring unit sends and the performance parameter of node, for the inquiry of service quality assessment module;
Man Machine Interface to the visualized management window that the user provides, is used for intuitively showing the various information of the relevant parameter that comprises topological structure, average energy, each node of current wireless sensor network as this Service Quality Management module.
8, according to claim 1 or 7 described systems, it is characterized in that: described Service Quality Management module further comprises following function: by the angle of macroscopical wireless sensor network system and each sensor node of microcosmic, adopt visual means to show the various different conditions of current network and node; Can Measurement Network, the information in node and path, and in measuring process, can obtain needed data fast by content-based filter; And have autgmentability and versatility, this Service Quality Management module can expanded application in the various kinds of sensors network, and be applicable to various sensor node type.
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101959295A (en) * | 2010-09-21 | 2011-01-26 | 中兴通讯股份有限公司 | Energy-saving management method, system and remote management server of wireless sensor network |
| CN102143020A (en) * | 2010-12-31 | 2011-08-03 | 华为终端有限公司 | Transmission method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1314240C (en) * | 2005-01-28 | 2007-05-02 | 北京邮电大学 | Wireless sensor network system and method supporting task reconfiguration |
| CN101132351A (en) * | 2006-08-21 | 2008-02-27 | 北京邮电大学 | Wireless sensor network path establishing method and device thereof |
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2008
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| CN110620678A (en) * | 2018-06-20 | 2019-12-27 | 华为技术有限公司 | Resource management method and device |
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