CN102571888A - Method for discovering wireless sensor access multiplexing equipment in centralized control type wireless sensor network - Google Patents
Method for discovering wireless sensor access multiplexing equipment in centralized control type wireless sensor network Download PDFInfo
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- CN102571888A CN102571888A CN2010106231514A CN201010623151A CN102571888A CN 102571888 A CN102571888 A CN 102571888A CN 2010106231514 A CN2010106231514 A CN 2010106231514A CN 201010623151 A CN201010623151 A CN 201010623151A CN 102571888 A CN102571888 A CN 102571888A
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Abstract
The invention relates to the technical field of information and communications, and in particular relates to a method for discovering wireless sensor access multiplexing equipment in a centralized control type wireless sensor network. A novel architecture and networking equipment of the centralized control type wireless sensor network are designed to solve the problems of controllability and manageability of the large-scale wireless sensor networks. In the networking architecture, the wireless sensor access multiplexing equipment is controlled by a ubiquitous sensor network controller to realize topology maintenance and management control of local wireless sensor networks and provide such functions as network access, configuration, management, data transmission and the like to the wireless sensor nodes in the local wireless sensor networks. The method is provided, thus helping the wireless sensor nodes based on IP (internet protocol) to automatically discover available wireless sensor access multiplexing equipment in the network and select the best wireless sensor access multiplexing equipment to establish network connection.
Description
Technical field
The present invention relates to communication network, relate in particular to the discover method of a kind of wireless sensing access and multiplexing device in the centralized control formula radio sensing network.
Background technology
For lower deployment cost and the operation cost that reduces the large-scale wireless sensing network; But solve the controlled problem of management of large-scale wireless sensing network; As shown in Figure 1; A kind of architecture and networking equipment of novel centralized control formula radio sensing network are devised, thereby can solve the problem of large-scale wireless sensing network at aspects such as network management, safety, professional control and interoperabilities effectively.
Compare present radio sensing network architecture, this novel centralized control formula radio sensing network architecture has increased ubiquitous sensing network controller and these two novel networking equipments of wireless sensing access and multiplexing device.Ubiquitous sensing network controller can be regarded as one group of logical device, and functions such as centralized control, management, data processing are provided for whole radio sensing network; The wireless sensing access and multiplexing device is the radio sensing network control appliance in the local scope; It is under the control of ubiquitous sensing network controller; Realization provides functions such as network insertion, node configuration and management, transfer of data and processing to the network insertion of local radio sensing network, topological maintenance, data forwarding and management control to the wireless sensor node in the local radio sensing network.
A ubiquitous sensing network controller may be controlled to hundred thousands of wireless sensing access and multiplexing devices and comes the common large-scale wireless sensing network that surpasses 100,000 above wireless sensor nodes of setting up.
In this centralized control formula radio sensing network; Each wireless sensor node need be linked into radio sensing network through the wireless sensing access and multiplexing device; Thereby receive the wireless sense network control information; Transmit sensor acquisition information, and interconnecting between other wireless sensor node in realization and the network.
Summary of the invention
The present invention is directed to centralized control formula radio sensing network architecture and networking equipment shown in Figure 1; Proposed a kind of discover method of wireless sensing access and multiplexing device, thereby helped IP-based wireless sensor node to find wireless sensing access and multiplexing device available in the network automatically and select optimal wireless sensing access and multiplexing device to set up network to connect.
Wireless sensor node can get into the Discovery Status of wireless sensing access and multiplexing device under two kinds of situation: (1) wireless sensor node just powers on or restarts; Initial work is accomplished; Need being connected of foundation and wireless sensing access and multiplexing device, insert radio sensing network; (2) wireless sensor node and the wireless sensing access and multiplexing device communication that has been connected connect and interrupt, and need rebulid and being connected of wireless sensing access and multiplexing device, to be linked in the radio sensing network again.
According to a first aspect of the invention, provide the wireless sensing access and multiplexing device to find the request message definition.The wireless sensing access and multiplexing device finds that institute's loaded information comprises in the request message: find type, wireless sensor node hardware description unit, wireless sensor node description unit.Wherein, find that type is used to represent that wireless sensor node obtains the method for the address of wireless sensing access and multiplexing device; Wireless sensor node hardware description unit is used to carry the hardware information of wireless sensor node; The wireless sensor node description unit is used to carry wireless sensor node information.
The wireless sensing access and multiplexing device finds that request message is used for the wireless sensing access and multiplexing device of finding that automatically network is available by wireless sensor node.The basic capacity that the wireless sensing access and multiplexing device is found to transmit wireless sensor node in the request message is to the wireless sensing access and multiplexing device.A wireless sensor node must provide these information to the wireless sensing access and multiplexing device, with guarantee and the functional characteristics of information exchange that the wireless sensing access and multiplexing device is follow-up and wireless sensor node consistent.
According to a second aspect of the invention, provide the wireless sensing access and multiplexing device to find the response message definition.The wireless sensing access and multiplexing device finds that institute's loaded information comprises in the response message: wireless sensing access and multiplexing device description unit, wireless sensing access and multiplexing device title, alternative wireless sensing access and multiplexing device unit.Wherein: wireless sensing access and multiplexing device description unit is used to carry wireless sensing access and multiplexing device descriptor; Wireless sensing access and multiplexing device title is made up of the character string of sign wireless sensing access and multiplexing device; Substitute wireless sensing access and multiplexing device unit and form, in order to notify the information of other wireless sensing access and multiplexing device that can insert to wireless sensor node by wireless sensing access and multiplexing device IP address and the two-part tabulation of wireless sensor node number of connection.
The wireless sensing access and multiplexing device is replied the wireless sensing access and multiplexing device that receives with wireless sensing access and multiplexing device discovery response message and is found request message.
According to a third aspect of the invention we, provide main and found the request message definition with the wireless sensing access and multiplexing device.The master finds that with the wireless sensing access and multiplexing device institute's loaded information comprises in the request message: wireless sensor node hardware description unit, wireless sensor node description unit.
Wireless sensor node sends the master and finds with the wireless sensing access and multiplexing device request message detects the main whether available with the wireless sensing access and multiplexing device of it.When wireless sensor node has disposed main IP address with the wireless sensing access and multiplexing device; But owing to main with reasons such as wireless sensing access and multiplexing device load-reason or network service are not smooth; Can cause wireless sensor node after startup, can't insert its master and use the wireless sensing access and multiplexing device, thereby be linked into other wireless sensing access and multiplexing device.When this situation occurring, wireless sensor node can periodically send the master and check with wireless sensing access and multiplexing device discovery request message whether the main of it has become upstate with the wireless sensing access and multiplexing device in running.
According to a forth aspect of the invention, provide main and found the response message definition with the wireless sensing access and multiplexing device.The master finds that with the wireless sensing access and multiplexing device institute's loaded information comprises in the response message: wireless sensing access and multiplexing device description unit, wireless sensing access and multiplexing device title, alternative wireless sensing access and multiplexing device unit.
The wireless sensing access and multiplexing device receive main find request message with the wireless sensing access and multiplexing device after, find that with leading response message replys with the wireless sensing access and multiplexing device.
According to a fifth aspect of the invention, the definition of wireless sensor node hardware description unit is provided.Wireless sensor node hardware description unit comprises: device fabrication identification of the manufacturer, wireless sensor node sequence number, wireless sensor node MAC Address.Wherein: the device fabrication identification of the manufacturer is meant the identifier of wireless sensor node production firm; The wireless sensor node sequence number is represented the hardware sequence number of wireless sensor node; The wireless sensor node MAC Address is used to indicate the wireless sensor node address information.
According to a sixth aspect of the invention, the definition of wireless sensor node description unit is provided.The wireless sensor node description unit comprises: node type, cryptographic capabilities parameter, hardware version numbers, software version number, boot version number, other software version number.Wherein: node type is used to represent the wireless sensor node type; The cryptographic capabilities parameter is used to represent whether wireless sensor node has the cryptographic capabilities to data flow transmitted; Hardware version numbers is used to represent the hardware version of wireless sensor node; Software version number is used to represent the software version of the current operation of wireless sensor node; Boot version number is used to represent the boot version of wireless sensor node; The software version number of the non-operating state that other software version number are represented to store on the wireless sensor node.
According to a seventh aspect of the invention, the definition of wireless sensing access and multiplexing device description unit is provided.Wireless sensing access and multiplexing device description unit comprises: current wireless sensor node quantity, wireless sensor node restricted number, security type.Wherein: current wireless sensor node quantity is meant the present wireless sensor node number that inserts of said wireless sensing access and multiplexing device; The wireless sensor node restricted number is meant the wireless sensor node quantity that said wireless sensing access and multiplexing device maximum can insert; Security type is meant the secured fashion of communicating by letter between wireless sensing access and multiplexing device and the wireless sensor node, and wherein 1 representes expressly communication mode, 2 expression coded communication modes.
According to an eighth aspect of the invention, provide not pre-configured main with wireless sensing access and multiplexing device situation under, wireless sensing access and multiplexing device discovery flow process.Wherein, may further comprise the steps:
A) wireless sensor node obtains wireless sensing access and multiplexing device address list;
B) wireless sensor node sends a wireless sensing access and multiplexing device in the wireless sensing access and multiplexing device address list that the wireless sensing access and multiplexing device finds that request message obtains to step a); The wireless sensing access and multiplexing device sends wireless sensing access and multiplexing device discovery response message and replys said wireless sensor node after receiving wireless sensing access and multiplexing device discovery request message;
C) wireless sensor node waits and receives wireless sensing access and multiplexing device discovery response message.If the overtime wireless sensing access and multiplexing device that do not receive of wireless sensor node is found response message; And comprise a plurality of candidate's wireless sensing access and multiplexing devices in the wireless sensing access and multiplexing device address list; Next wireless sensing access and multiplexing device in the wireless sensor node option table, repeating step b) transmission wireless sensing access and multiplexing device discovery request message;
D) find response message if wireless sensor node receives the wireless sensing access and multiplexing device, finish discovery procedure.
If the not pre-configured main wireless sensing access and multiplexing device of using on the wireless sensor node, then wireless sensor node is found available wireless sensing access and multiplexing device through above-mentioned flow process, to carry out network insertion after startup.
According to a ninth aspect of the invention, provide pre-configured main with wireless sensing access and multiplexing device situation under, main discovery flow process with the wireless sensing access and multiplexing device.Wherein, may further comprise the steps:
A) wireless sensor node sends the master and finds that with the wireless sensing access and multiplexing device request message arrives pre-configured master with wireless sensing access and multiplexing device address;
B) the wireless sensing access and multiplexing device receive main find request message with the wireless sensing access and multiplexing device after, send main with wireless sensing access and multiplexing device discovery response message to wireless sensor node.
If the pre-configured main wireless sensing access and multiplexing device of using on the wireless sensor node, then wireless sensor node is found available mainly to use the wireless sensing access and multiplexing device through above-mentioned flow process after startup, carries out the network insertion process.
According to the tenth aspect of the invention; If wireless sensor node does not receive in the discovery procedure of wireless sensing access and multiplexing device from the wireless sensing access and multiplexing device of any wireless sensing access and multiplexing device and finds response message; Then wireless sensor node can't get into the further work state; It need be after waiting one section delay time; Restart the wireless sensing access and multiplexing device and find flow process, till finding available wireless sensing access and multiplexing device to be linked in the radio sensing network.
Adopt scheme of the present invention, wireless sensor node can be found the wireless sensing access and multiplexing device that can connect automatically, thereby sets up and being connected of wireless sensing access and multiplexing device, and through its access radio sensing network.
Description of drawings
Through with reference to the detailed description of being done below the advantages to non-limiting example, other features, objects and advantages of the present invention will become more obvious.Illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 shows the system architecture diagram of centralized control formula radio sensing network;
Fig. 2 shows the form sketch map according to the wireless sensor node hardware description unit of a specific embodiment of the present invention;
Fig. 3 shows the form sketch map according to the wireless sensor node description unit of a specific embodiment of the present invention;
Fig. 4 shows the form sketch map according to the wireless sensing access and multiplexing device description unit of a specific embodiment of the present invention;
Fig. 5 shows according to the dereliction of a specific embodiment of the present invention flow chart with the wireless sensing access and multiplexing device discovery procedure under the wireless sensing access and multiplexing device configuring condition;
Fig. 6 shows according to the main flow chart with the wireless sensing access and multiplexing device discovery procedure under the wireless sensing access and multiplexing device configuring condition of having of a specific embodiment of the present invention.
Wherein, same or analogous Reference numeral is represented same or analogous steps characteristic or device/module.
Embodiment
Below in conjunction with accompanying drawing, preferred implementation of the present invention is carried out detailed explanation.
Below, first aspect of the present invention is described, wherein, Fig. 1 and associated description thereof are incorporated herein by reference.
The wireless sensing access and multiplexing device finds that institute's loaded information comprises in the request message: find type, wireless sensor node hardware description unit, wireless sensor node description unit.
Find that type is used to represent that wireless sensor node obtains the method for the address information of wireless sensing access and multiplexing device, comprising: 1 expression static configuration method, 2 expression election methods.Wireless sensor node can obtain the wireless sensing access and multiplexing device address that can insert through static configuration, also can obtain the wireless sensing access and multiplexing device address information that other can carry out network insertion through the information of the alternative wireless sensing access and multiplexing device unit in the wireless sensing access and multiplexing device discovery response message.
Wireless sensor node hardware description unit is used to carry the hardware information of wireless sensor node.
The wireless sensor node description unit is used to carry the wireless sensor node descriptor.
Wireless sensor node sends the wireless sensing access and multiplexing device and finds the wireless sensing access and multiplexing device of request message to the candidate; Utilize the wireless sensing access and multiplexing device to find that the information word in the request message transmits the basic capacity and the sign of wireless sensor node, judge whether to have the ability and can the network insertion service be provided for said wireless sensor node with the wireless sensing access and multiplexing device that allows to receive this message.
Below, second aspect of the present invention is described, wherein, Fig. 1 and associated description thereof are incorporated herein by reference.
The wireless sensing access and multiplexing device finds that institute's loaded information comprises in the response message: wireless sensing access and multiplexing device description unit, wireless sensing access and multiplexing device title, alternative wireless sensing access and multiplexing device unit.
The descriptor that wireless sensing access and multiplexing device description unit is used to carry the wireless sensing access and multiplexing device.
Wireless sensing access and multiplexing device title is made up of the character string of sign wireless sensing access and multiplexing device.
Substituting wireless sensing access and multiplexing device unit is made up of wireless sensing access and multiplexing device IP address and the two-part tabulation of wireless sensor node number of connection.Wherein, Wireless sensing access and multiplexing device IP address is meant the IP address of another wireless sensing access and multiplexing device that can replace said wireless sensing access and multiplexing device, and the wireless sensor node number of connection is meant the wireless sensor node quantity of the current connection of this wireless sensing access and multiplexing device.Substitute wireless sensing access and multiplexing device unit and can comprise 0 to a plurality of wireless sensing access and multiplexing device information.Substitute wireless sensing access and multiplexing device unit and be used for, Single Point of Faliure perhaps occurs in case the wireless sensing access and multiplexing device that current request connects connects to lose efficacy to wireless sensor node provides candidate's wireless sensing access and multiplexing device that more can connect address information.
When the wireless sensing access and multiplexing device that receives wireless sensing access and multiplexing device discovery request message can't provide the network insertion service for this wireless sensor node, the wireless sensing access and multiplexing device can be found to recommend other that wireless sensing access and multiplexing device of radio sensing network access service can be provided to wireless sensor node through substituting wireless sensing access and multiplexing device unit in the response message at the wireless sensing access and multiplexing device.Wireless sensor node can be through checking the wireless sensor node number of connection that substitutes each the wireless sensing access and multiplexing device in the wireless sensing access and multiplexing device unit; Select when the lighter wireless sensing access and multiplexing device of preload; Send the wireless sensing access and multiplexing device and find request message, request is linked into this wireless sensing access and multiplexing device.
Below, the third aspect of the invention is described, and wherein, Fig. 1 and associated description thereof are incorporated herein by reference.
The master finds that with the wireless sensing access and multiplexing device institute's loaded information comprises in the request message: wireless sensor node hardware description unit, wireless sensor node description unit.
Wireless sensor node hardware description unit is used to carry the hardware information of wireless sensor node.
The wireless sensor node description unit is used to carry the descriptor of wireless sensor node.
Wireless sensor node sends the master and finds with the wireless sensing access and multiplexing device request message detects the main whether available with the wireless sensing access and multiplexing device of it.When wireless sensor node has disposed the main wireless sensing access and multiplexing device of using; And current it when being connected on the another one wireless sensing access and multiplexing device, wireless sensor node periodically sends mainly leads whether become upstate with the wireless sensing access and multiplexing device with what the wireless sensing access and multiplexing device found that request message checks it.
Below, fourth aspect of the present invention is described, wherein, Fig. 1 and associated description thereof are incorporated herein by reference.
The master finds that with the wireless sensing access and multiplexing device institute's loaded information comprises in the response message: wireless sensing access and multiplexing device description unit, wireless sensing access and multiplexing device title, alternative wireless sensing access and multiplexing device unit.
Wireless sensing access and multiplexing device description unit is used to carry wireless sensing access and multiplexing device descriptor.
Wireless sensing access and multiplexing device title is made up of the character string of sign wireless sensing access and multiplexing device.
Substituting wireless sensing access and multiplexing device unit is made up of wireless sensing access and multiplexing device IP address and the two-part tabulation of wireless sensor node number of connection.Wherein, Wireless sensing access and multiplexing device IP address is meant the IP address of other wireless sensing access and multiplexing devices that can replace said wireless sensing access and multiplexing device, and the wireless sensor node number of connection is meant the wireless sensor node quantity of the current connection of this wireless sensing access and multiplexing device.
Main uses the wireless sensing access and multiplexing device find response message as the wireless sensing access and multiplexing device provide a kind of can be to the mechanism that it is configured to main its service ability of wireless sensor node advertisement that connects with the request of wireless sensing access and multiplexing device.
Below, with reference to Fig. 2 the 5th aspect of the present invention is described, wherein, Fig. 1 and associated description thereof are incorporated herein by reference.
Wireless sensor node hardware description unit is used to carry the hardware information of wireless sensor node, comprising: device fabrication identification of the manufacturer, wireless sensor node sequence number, wireless sensor node MAC Address.
The device fabrication identification of the manufacturer is meant the identifier of wireless sensor node production firm.
The wireless sensor node sequence number is represented the hardware sequence number of wireless sensor node.
The wireless sensor node MAC Address is used to indicate the wireless sensor node address information.
Below, with reference to Fig. 3 the 6th aspect of the present invention is described, wherein, Fig. 1 and associated description thereof are incorporated herein by reference.
The wireless sensor node description unit is used to carry wireless sensor node information, comprising: node type, cryptographic capabilities parameter, hardware version numbers, software version number, boot version number, other software version number.
Node type is used to represent the wireless sensor node type.
The cryptographic capabilities parameter is used to notify the wireless sensing access and multiplexing device whether to have the ability that data flow transmitted is encrypted about wireless sensor node, and 0 expression wireless sensor node does not have cryptographic capabilities, and 1 expression wireless sensor node has cryptographic capabilities.Only with when wireless sensor node and wireless sensing access and multiplexing device all have cryptographic capabilities, data flow transmitted can be encrypted between wireless sensor node and the wireless sensing access and multiplexing device, thus the raising safety of data.
Hardware version numbers is used to represent the hardware version information of wireless sensor node.
Software version number is used to represent the software version information of the current operation of wireless sensor node.
Boot version number is used to represent the boot version information of wireless sensor node.
The software version number of the non-operating state that other software version number are represented to store on the wireless sensor node.Can preserve on the wireless sensor node more than a software version; Especially for the on-line loaded function of software version is provided; Can preserve original software version and the new software version that loads on the wireless sensor node simultaneously, and identify move which software version when pointing out that wireless sensor node starts through current version is set.
Below, with reference to Fig. 4 the 7th aspect of the present invention is described, wherein, Fig. 1 and associated description thereof are incorporated herein by reference.
Wireless sensing access and multiplexing device description unit is used to carry wireless sensing access and multiplexing device descriptor, comprising: current wireless sensor node quantity, wireless sensor node restricted number, security type.
Current wireless sensor node quantity is meant the present wireless sensor node number that inserts of said wireless sensing access and multiplexing device, i.e. wireless sensor node number in the local area radio sensing network controlled of wireless sensing access and multiplexing device.
The wireless sensor node restricted number is meant the wireless sensor node quantity that said wireless sensing access and multiplexing device maximum can insert.Through current wireless sensor node quantity and wireless sensor node restricted number parameter; The wireless sensor node that receives wireless sensing access and multiplexing device discovery response message can be judged the load weight of wireless sensing access and multiplexing device, thereby whether decision inserts this wireless sensing access and multiplexing device.
Security type is meant the secured fashion of communicating by letter between wireless sensing access and multiplexing device and the wireless sensor node, and wherein 1 representes expressly communication mode, 2 expression coded communication modes.Data communication between wireless sensor node and the wireless sensing access and multiplexing device can be adopted cipher mode or clear-text way; If wireless sensor node possesses cryptographic capabilities; Then can between wireless sensor node and wireless sensing access and multiplexing device, adopt the coded communication mode, thereby improve the fail safe of wireless sensing data message.
According to the embodiment of the invention, also provide a kind of not pre-configured main with wireless sensing access and multiplexing device situation under, the discovery flow process of wireless sensing access and multiplexing device.Below according to Fig. 5 and combine Fig. 1 to introduce this flow process.This flow process comprises following processing:
Step S10, wireless sensor node obtain wireless sensing access and multiplexing device address list.Send the wireless sensing access and multiplexing device at wireless sensor node and find request message before the wireless sensing access and multiplexing device, it need at first obtain sends the target ip address that the wireless sensing access and multiplexing device is found request message.If wireless sensor node and wireless sensing access and multiplexing device are positioned at same subnet; The wireless sensing access and multiplexing device finds that the purpose IP address of request message can be set to broadcast IP address (255.255.255.255), otherwise wireless sensor node need obtain the IP address of wireless sensing access and multiplexing device in advance.Several kinds of modes that can have wireless sensor node obtain the IP address of wireless sensing access and multiplexing device: static configuration mode, election mode.Under the static configuration mode, the IP address of wireless sensing access and multiplexing device is pre-configured and be kept in the nonvolatile storage of wireless sensor node.Under the election mode; The wireless sensing access and multiplexing device can be found to carry alternative wireless sensing access and multiplexing device IP address list in the response message at the wireless sensing access and multiplexing device, thereby helps wireless sensor node to find more available wireless sensing access and multiplexing device.
Step S11; Wireless sensor node is selected a wireless sensing access and multiplexing device from the wireless sensing access and multiplexing device tabulation that step S10 is obtained, send the wireless sensing access and multiplexing device and find that request message is to selected wireless sensing access and multiplexing device.The wireless sensing access and multiplexing device sends wireless sensing access and multiplexing device discovery response message and replys wireless sensor node after receiving wireless sensing access and multiplexing device discovery request message.The wireless sensing access and multiplexing device that no matter receives find request message be send with broadcast mode or mode of unicast sends; Wireless sensing access and multiplexing device one receives the discovery request message, and the unicast ip address of all using wireless sensor node sends the wireless sensing access and multiplexing device and finds that response message is to wireless sensor node.
Step S12, wireless sensor node wait reception and find response message from the wireless sensing access and multiplexing device of wireless sensing access and multiplexing device.If the overtime wireless sensing access and multiplexing device that do not receive of wireless sensor node is found response message; And comprise a plurality of candidate's wireless sensing access and multiplexing devices in the wireless sensing access and multiplexing device address list; Next wireless sensing access and multiplexing device in the wireless sensor node option table, repeating step S11 sends the wireless sensing access and multiplexing device and finds request message.
Step S13 finds response message if wireless sensor node receives the wireless sensing access and multiplexing device, finishes discovery procedure, and starts to the network insertion operation of this wireless sensing access and multiplexing device.
According to the embodiment of the invention, also provide a kind of pre-configured main with wireless sensing access and multiplexing device situation under, main discovery flow process with the wireless sensing access and multiplexing device.Below according to Fig. 6 and combine Fig. 1 to introduce this flow process.This flow process comprises following processing:
Step S20, wireless sensor node send the master and find that with the wireless sensing access and multiplexing device request message is to the pre-configured main wireless sensing access and multiplexing device of using.
Step S21, the wireless sensing access and multiplexing device receive main find request message with the wireless sensing access and multiplexing device after, send main with wireless sensing access and multiplexing device discovery response message to said wireless sensor node.
Mainly use the wireless sensing access and multiplexing device because wireless sensor node is pre-configured, so wireless sensor node need not use other modes to obtain available wireless sensing access and multiplexing device address.If when wireless sensor node sending main with wireless sensing access and multiplexing device discovery request message after; Can in time receive main with wireless sensing access and multiplexing device discovery request response; Then wireless sensor node begins to set up and being connected of wireless sensing access and multiplexing device, and no longer carries out discovery procedure with other wireless sensing access and multiplexing devices.Otherwise wireless sensor node need use the discovery procedure of wireless sensing access and multiplexing device to find the wireless sensing access and multiplexing device that other are available.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done is equal to replacement, improves etc., all should be included within protection scope of the present invention.
Claims (10)
1. the discover method of a wireless sensing access and multiplexing device; Thereby help IP-based wireless sensor node to find wireless sensing access and multiplexing device available in the network automatically and select optimal wireless sensing access and multiplexing device to set up network to connect; It is characterized in that the IP wireless sensor node can get into the Discovery Status of wireless sensing access and multiplexing device under two kinds of situation:
A) wireless sensor node just powers on or restarts, and initial work is accomplished, and needs being connected of foundation and wireless sensing access and multiplexing device, inserts radio sensing network;
B) wireless sensor node and the wireless sensing access and multiplexing device communication that has been connected connect and interrupt, and need rebulid and being connected of wireless sensing access and multiplexing device, to be linked in the radio sensing network again.
2. the discover method of wireless sensing access and multiplexing device according to claim 1, its characteristic also be, not pre-configured main with wireless sensing access and multiplexing device situation under, wireless sensing access and multiplexing device discovery flow process may further comprise the steps:
A) wireless sensor node obtains wireless sensing access and multiplexing device address list;
B) wireless sensor node sends the wireless sensing access and multiplexing device and finds the wireless sensing access and multiplexing device of request message in the wireless sensing access and multiplexing device address list; The wireless sensing access and multiplexing device sends wireless sensing access and multiplexing device discovery response message and replys wireless sensor node after receiving wireless sensing access and multiplexing device discovery request message;
C) wireless sensor node waits reception and finds response message from the wireless sensing access and multiplexing device of wireless sensing access and multiplexing device; Do not receive if wireless sensor node is overtime; And comprise a plurality of candidate's wireless sensing access and multiplexing devices in the wireless sensing access and multiplexing device address list; Next wireless sensing access and multiplexing device in the wireless sensor node option table, repeating step b) transmission wireless sensing access and multiplexing device discovery request message;
D) find response message if wireless sensor node receives the wireless sensing access and multiplexing device, finish discovery procedure.
3. the discover method of wireless sensing access and multiplexing device according to claim 1, its characteristic also be, pre-configured main with wireless sensing access and multiplexing device situation under, the wireless sensing access and multiplexing device finds that flow process may further comprise the steps:
A) wireless sensor node sends the master and finds that with the wireless sensing access and multiplexing device request message is to the pre-configured main wireless sensing access and multiplexing device of using;
B) the wireless sensing access and multiplexing device receive main find request message with the wireless sensing access and multiplexing device after, send main with wireless sensing access and multiplexing device discovery response message to said wireless sensor node.
4. according to the discover method of the described wireless sensing access and multiplexing device of claim 1-3, its characteristic also is:
A) wireless sensor node sends the master and finds with the wireless sensing access and multiplexing device request message detects the main whether available with the wireless sensing access and multiplexing device of it;
B) disposed the main wireless sensing access and multiplexing device of using when wireless sensor node; But owing to main with reasons such as wireless sensing access and multiplexing device load-reason or network service are not smooth; Can cause wireless sensor node after startup, can't insert its master and use the wireless sensing access and multiplexing device, thereby be linked into other wireless sensing access and multiplexing device through the discovery procedure of wireless sensing access and multiplexing device;
C) when disposed main wireless sensor node with the wireless sensing access and multiplexing device be linked into non-main with the wireless sensing access and multiplexing device on the time; Wireless sensor node can periodically send the master and check with wireless sensing access and multiplexing device discovery request message whether the main of it has become upstate with the wireless sensing access and multiplexing device in running;
D) if wireless sensor node finds not receive in the flow process wireless sensing access and multiplexing device discovery response message from any wireless sensing access and multiplexing device at the wireless sensing access and multiplexing device; Then wireless sensor node can't get into the further work state; It need be after waiting one section delay time; Restart the wireless sensing access and multiplexing device and find flow process, till finding available wireless sensing access and multiplexing device to be linked in the radio sensing network.
5. according to the discover method of the described wireless sensing access and multiplexing device of claim 1-4, the wireless sensing access and multiplexing device finds that request message is characterised in that:
A) the wireless sensing access and multiplexing device finds that request message is used for the wireless sensing access and multiplexing device of finding that automatically network is available by wireless sensor node;
B) the wireless sensing access and multiplexing device finds that institute's loaded information comprises in the request message: find type, wireless sensor node hardware description unit, wireless sensor node description unit;
C) find that type is used to represent that wireless sensor node obtains the method for the address of wireless sensing access and multiplexing device;
D) wireless sensor node hardware description unit is used to carry the hardware information of wireless sensor node, and it comprises: device fabrication identification of the manufacturer, wireless sensor node sequence number, wireless sensor node MAC Address;
E) the device fabrication identification of the manufacturer is used to represent the identifier of wireless sensor node production firm;
F) the wireless sensor node sequence number is used to represent the hardware sequence number of wireless sensor node;
G) the wireless sensor node MAC Address is used to represent the wireless sensor node address information.
H) the wireless sensor node description unit is used to carry wireless sensor node information.
6. according to the discover method of the described wireless sensing access and multiplexing device of claim 1-4, the wireless sensing access and multiplexing device finds that response message is characterised in that:
A) the wireless sensing access and multiplexing device is replied the wireless sensing access and multiplexing device that receives with the discovery response message and is found request message;
B) the wireless sensing access and multiplexing device finds that institute's loaded information comprises in the response message: wireless sensing access and multiplexing device description unit, wireless sensing access and multiplexing device title, alternative wireless sensing access and multiplexing device unit;
C) wireless sensing access and multiplexing device description unit is used to carry wireless sensing access and multiplexing device descriptor;
D) wireless sensing access and multiplexing device title is made up of the character string of sign wireless sensing access and multiplexing device;
E) substitute wireless sensing access and multiplexing device unit, be used for notifying the information of other wireless sensing access and multiplexing device that can insert to wireless sensor node.
7. according to the discover method of the described wireless sensing access and multiplexing device of claim 1-4, the master finds that with the wireless sensing access and multiplexing device request message is characterised in that:
A) master finds that with the wireless sensing access and multiplexing device institute's loaded information comprises in the request message: wireless sensor node hardware description unit, wireless sensor node description unit.
B) wireless sensor node hardware description unit is used to carry the hardware information of wireless sensor node;
C) the wireless sensor node description unit is used to carry wireless sensor node information.
8. according to the discover method of the described wireless sensing access and multiplexing device of claim 1-4, the master finds that with the wireless sensing access and multiplexing device response message is characterised in that:
A) master finds that with the wireless sensing access and multiplexing device institute's loaded information comprises in the response message: wireless sensing access and multiplexing device description unit, wireless sensing access and multiplexing device title, alternative wireless sensing access and multiplexing device unit;
B) wireless sensing access and multiplexing device description unit is used to carry wireless sensing access and multiplexing device descriptor;
C) wireless sensing access and multiplexing device title is made up of the character string of sign wireless sensing access and multiplexing device;
D) substitute the information that wireless sensing access and multiplexing device unit is used for other wireless sensing access and multiplexing device that can insert to the wireless sensor node transmission.
9. find that according to claim 5 and claim 7 described wireless sensing access and multiplexing devices request message and master find request message with the wireless sensing access and multiplexing device, the wireless sensor node description unit is characterised in that:
A) the wireless sensor node description unit comprises: node type, cryptographic capabilities parameter, hardware version numbers, software version number, boot version number, other software version number;
B) node type is used to represent the wireless sensor node type;
C) cryptographic capabilities parameter is used to represent whether wireless sensor node has the cryptographic capabilities to data flow transmitted;
D) hardware version numbers is used to represent the hardware version of wireless sensor node;
E) software version number is used to represent the software version of the current operation of wireless sensor node;
F) boot version number is used to represent the boot version of wireless sensor node;
G) software version number of other software version number non-operating state of representing to store on the wireless sensor node.
10. find that according to claim 6 and claim 8 described wireless sensing access and multiplexing devices response message and master find response message with the wireless sensing access and multiplexing device, wireless sensing access and multiplexing device description unit is characterised in that:
A) wireless sensing access and multiplexing device description unit comprises: current wireless sensor node quantity, wireless sensor node restricted number, security type;
B) current wireless sensor node quantity is meant the present wireless sensor node number that inserts of said wireless sensing access and multiplexing device;
C) the wireless sensor node restricted number is meant the wireless sensor node quantity that said wireless sensing access and multiplexing device maximum can insert;
D) security type is meant the secured fashion of communicating by letter between wireless sensing access and multiplexing device and the wireless sensor node, and wherein 1 representes expressly communication mode, 2 expression coded communication modes.
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Application publication date: 20120711 |