CN102448022B - A kind of sensor network group mobility management method and system thereof - Google Patents
A kind of sensor network group mobility management method and system thereof Download PDFInfo
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Abstract
The invention provides the technical scheme of a kind of sensor network group mobility management, when sensor network nodes is moved, determine whether the sensor network group belonging to this node is moved by the access network gateway of its correspondence; And ask the control appliance of network side to carry out location updating to the network gateway corresponding to this sensor network group lower sensor node; Network gateway carries out local position renewal according to the acknowledge message of control appliance, upgrades this sensor network group lower sensor node corresponding to the addressable information in sensor network, corresponding to the mapping relations between the addressable information in access network.This technical scheme is the mobile management that side Network Based realizes to sensor network group, and do not need the mobile management signaling realizing being correlated with on sensor node, this is applicable to power consumption, sensor node limited in one's ability.
Description
Technical field
The present invention relates to communication technical field, particularly relate to the method to the management of sensor network group mobility and system thereof.
Background technology
Sensor network is the comprehensive intelligent information system integrating information gathering, information processing, information transmission, can be used for the numerous areas such as public safety, ecological, environmental protective, intelligent transportation, Smart Home.Such as, the unified networking regulation and control etc. of the various parameter collection of the transducer/controller network in intelligent residence, industry spot, controller, can be realized by sensor network.
When sensor network moves, it needs to carry out location update operations in related network entity, if each sensor node under sensor network independently carries out location update operations, a large amount of mobile management signalings will be caused, offered load increases, and the power consumption of sensor node, thus multiple sensor network group mobility administrative mechanism with same mobility feature is seemed necessary.
Now, network mobility mechanism (NEM0) is generally taked for the management of sensor network group mobility, it is by carrying out certain expansion to Mobile IP, one group of mobile sensor node is defined as a mobile sensor network, a mobile router (MR) is wherein set and is responsible for mobile management, when this mobile sensor network moves to a new network insertion node, MR obtains a new Care-of Address from it, and send a Binding Update to home agent (HA) to notify that all packets will re-route to this Care-of Address, the packet of any sensor node that communication node (CN) mails under this mobile sensor network will be tackled by HA, MR is sent to by the bidirectional tunnel between HA and MR after encapsulating further, MR carries out decapsulation and is transmitted to the sensor node of specifying again, the packet that sensor node under mobile sensor network sends also needs to carry out same reverse operating.
Aforementioned schemes needs to arrange the higher MR of other sensor node hardware requirement relative, because MR is as the network entity of sensor network side but not the network entity in communication network, sensor node is sightless concerning communication network operator, and it is a potential unfavorable factor to network security; And communication network operator can not participate in the value chain of sensor network.
In addition, when a sensor node enters this mobile sensor network from other Network Mobility, it will be a common IP access network depending on this mobile sensor network.So, this sensor node needs mobile IP protocol to carry out mobile management, because MIP protocol stack is a Host Based mobility management protocol, to the electric power of this sensor node and disposal ability consumption spending larger; And, due to the packet between all and extraneous communication node under mobile sensor network all to need by MR and HA between tunnel, this sensor node for a lightweight is inconvenient.
Summary of the invention
The present invention aims to provide a kind of technical scheme of sensor network group being carried out to mobile management, when a sensor node is moved, by network side, the sensor group group mobility belonging to it is confirmed, and shift position renewal is carried out to the sensor node under this group.
According to an aspect of the present invention, to provide in a kind of network gateway auxiliary method of sensor network group being carried out to mobile management here, it determines the whether generation sensor network group mobility under network gateway; When sensor network group is moved, the control appliance of request network side carries out location updating to the network gateway corresponding to this sensor network group lower sensor node; And carry out local position renewal according to the acknowledge message of control appliance, upgrade this sensor network group lower sensor node corresponding to the addressable information in sensor network, corresponding to the mapping relations between the addressable information in access network.
According to another aspect of the present invention, provide a kind of method of in control appliance, sensor network group being carried out to mobile management here, it obtains sensor network group information to network gateway; According to the sensor network group position updating request of network gateway, local position update process is carried out to the sensor node under described sensor network group, upgrade this network gateway parameter corresponding to sensor network group lower sensor node, and carry out sensor network group location updating to network gateway and confirm.
According to another aspect of the present invention, here provide a kind of and can be used for the communication system that sensor network group carries out mobile management, comprise: network gateway: the whether generation sensor network group mobility under Sampling network gateway, the control appliance of request network side carries out location updating to the network gateway corresponding to this sensor network group lower sensor node, and carry out local position renewal according to the acknowledge message of control appliance, upgrade this sensor network group lower sensor node corresponding to the addressable information in sensor network, corresponding to the mapping relations between the addressable information in access network, and control appliance: local position update process is carried out to the sensor node under described sensor network group, upgrades this network gateway parameter corresponding to sensor network group lower sensor node.
Communication system also can comprise a server, server, for preserving sensor network group information, comprises obtaining all the sensors node parameter and respective objects communication equipment parameter thereof under this group, so, support sensor network group is carried out cross-domain movement by communication system.
The technology of the present invention advantage:
Technical solution of the present invention is the mobile management that side Network Based realizes to sensor network group, and it does not need the mobile management signaling realizing being correlated with on sensor node, and this is applicable to power consumption, sensor node limited in one's ability; Sensor node does not need the protocol stack structure revising oneself to support the mobile management to sensor groups, more economical in realization, effective; Meanwhile, to it also avoid under traditional approach lower sensor group all the sensors node owing to carrying out mobile handoff, executing location renewal rewards theory and the signaling storm caused.In addition, communication network fortune, by the technical support of the mobile management to sensor network group, can participate in the value chain of sensor network, to promoting further developing of the application relevant to sensor network.
Accompanying drawing explanation
By the detailed description with the accompanying drawing proposed below, feature of the present invention, character and advantage will become more obvious, and element identical in accompanying drawing has identical mark, wherein:
Fig. 1 is sensor network system structure legend provided by the invention;
Fig. 2 is mobility operation related signalling messages flow chart illustration in sensor network group nodes region provided by the present invention;
Fig. 3 is sensor network group provided by the present invention interregional mobility operation related signalling messages flow chart illustration;
Fig. 4 is a kind of network group request message embodiment provided by the present invention;
Fig. 5 is a kind of network group acknowledge message embodiment provided by the present invention.
Fig. 6 is a kind of network group location update request message embodiment provided by the present invention;
Fig. 7 is a kind of network group location updating acknowledge message embodiment provided by the present invention.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiment of the present invention is described in detail.
Fig. 1 is sensor network system structure legend provided by the invention, it comprises: sensor network 11, network gateway 12,13,14, sensor network control appliance (UC) 15,25, server 30, communication node (CN) 40, wherein: sensor network 11 is made up of some sensor nodes, can be based on the short distance such as 6LoWPAN or Zigbee protocol, low rate, a low-consumption wireless accurate tissue construction of territory network mark; The data protocol conversion that network gateway 12,13,14 will complete between sensor network protocol standard to corresponding access network consensus standard, connected sensor network can be linked into dissimilar access network by it, such as fixed access network network, WiMax Radio Access Network etc.UC15, UC25, by the mobile management of the sensor node be responsible for respectively in zones of different 1,2 and group thereof, even safeguard the discrepancy of all data communication in this territory.Record is maintain all the sensors node and related network information thereof in the overall situation by server 30, such as: the information such as address, the corresponding destination communication node address of transducer of access network gateway corresponding to sensor id, transducer expansion unique identifier, sensor network group identification, transducer.
According to one of embodiment provided by the present invention, sensor network 11 times all the sensors nodes form a network group, represent with identical network group mark GR_ID, sensor network realizes based on 6LoWPAN consensus standard, and this network group can keep group's lower sensor node to communicate with the process that upgrades in time in network terminal of communication between node and its positional information carrying out moving in whole domain.Network group in legend under sensor network 11 move to new network gateway 13 from original network gateway 12, network gateway 13 determines whether this sensor node sensor network group mobility occurs, the sensor network group information that it can ask corresponding to this sensor node to the UC15 of network side; Whether be moved according to the sensor network group that obtained sensor network group information detects belonging to it.After determining that sensor network 11 is moved, network gateway 13 asks the UC15 of network side to carry out location updating to this network group lower sensor node, is namely updated to network gateway 13 from original network gateway 12; Afterwards, network gateway 13 carries out local position renewal according to the acknowledge message of UC15, and more under this network group, all the sensors node corresponds to addressable information in sensor network, corresponding to the mapping relations between the addressable information in access network.
Example explanation is carried out with mobility operation related signalling messages flow process in sensor network group nodes region below in conjunction with Fig. 2:
Step S201, sensor node under the responsible sensor network connected by this gateway of network gateway 13 is to dissimilar access network, it periodically sends Beacon frame, the GW_EUI comprising this network gateway and the PAN_ID (personal area network) in global network with uniqueness thereof, Beacon frame can be the IEEE802.15.4 frame format of a standard, all the sensors node in sensor network 11 (network group GR_ID) receives the Beacon frame of network gateway 13, send an Attach Request message to network gateway 13, this Attach Request message is by the SN_ID of carry sensors node, the information such as SN_EUI.Network gateway 13, after receiving Attach Request message, responds an attachment response message.Afterwards, network gateway 13 is by initiating further the verification process of this sensor node to judge the legitimacy (not illustrating in legend) of this sensor node;
Step S204, network gateway 13 is in order to judge whether the sensor network group belonging to this sensor node is moved; The network group information that it can ask corresponding to this sensor node to UC15, in conjunction with the network group request message example that legend 4 provides, the SN_ID of a sensor node is comprised in the mobile option of described request message, the information such as SN_EUI, outside address (GW_IPv6) information of network gateway, the flag that one is used for asking this sensor node belonging network group will be comprised further, our called after in this request message " G " upgrades with the shift position being different from other types; " G " flag is set to " 1 " expression request and carries out network group shift position update process.
Step S206, UC15 is responsible for the mobile management of sensor node, it is when receiving aforementioned request message, check whether " " and whether value is " 1 " to G to carry sensors network group flag, and the information such as the SN_ID of sensor node in request message, can judge that this sensor node is the sensor node (will be described in legend 3 for mobility process between territory) in one's respective area 1, if UC15 finds that this sensor node corresponds to a network group GR_ID, it obtains this sensor network group information further, sensor network group information can be informed to network gateway 13 by UC15, in conjunction with the network group acknowledge message example that legend 5 provides, carry sensors network group information in the mobile option of described acknowledge message, such as: network group identifies involved sensor nodes information under GR_ID and this group, comprise SN1_ID, SN1_EUI, SN1_IPv6......, outside, this acknowledge message is set to comprising a corresponding sensor network group identification position " G " further " 1 ".
Step S207, network gateway 13 can confirm sensor network group mobility further according to obtained sensor network group information, whether such as this gateway receives the attachment request of other subsequent sensor node under this group to judge moving integrally of this network group within a period of time, if confirm sensor network group mobility occurs, it sends a network group location update request message to the UC15 in territory, in conjunction with the message example that legend 6 provides, this location update message comprises the flag that is used to indicate sensor network group mobility " G ", the mobile option of this message is set to the group identification GR_ID of sensor network, and comprise address (GW_IPv6) information of this network gateway further.
Step S208, UC15 carry out location update operations according to aforementioned network group location update message to sensor nodes all under sensor network group GR_ID.That is: upgrade the network gateway GW address GW_IPv6.... etc. of each sensor node, so, the packet from CN is forwarded to new network gateway 13 by UC15.
Step S209, UC15 send network group location updating acknowledge message to network gateway 13; In conjunction with the message example that legend 7 provides, this acknowledge message comprises a flag " G " being used to indicate sensor network group mobility and upgrades with the shift position being different from other types; " G " flag is set to " 1 " expression and confirms the mobility location updating of network group; This network group mark GR_ID will be comprised in the mobile option of this acknowledge message.
Further, UC15 by the net-work parameter information SN1_CN_EUI of the corresponding target communication device of the sensor node under this mobile network group, SN1_CN_IPv6 etc., also can be supplied to network gateway 13 by aforementioned network group location updating acknowledge message.
Step S210, all the sensors node under network gateway 13 couples of sensor network group GR_ID carries out location update operations, that is: the mapping relations between aforementioned SN_ID, SN_EUI and SN_IPv6 are set up, under which, the packet that under network group, all the sensors node communicates with between node will be forwarded by UC15.
Further, if aforementioned location upgrades the net-work parameter information CN_EUI that acknowledge message comprises the Correspond Node CN40 of mobile sensor node, CN_IPv6 etc., network gateway 13 communicates with mapping relations between node CN40 by setting up network group lower sensor node further, under which, the packet that sensor node communicates with between node CN40 directly can carry out data retransmission by network gateway 13.
According to embodiment two provided by the present invention, sensor network 11 times all the sensors nodes form a network group and can carry out cross-domain movement and keep group's lower sensor node to communicate with the process that upgrades in time in network terminal of communication between node and its positional information.In legend, sensor network 11 moves to new network gateway 14 from original network gateway 13, and network gateway 14 determines whether sensor network group mobility occurs, and it asks the sensor network group information corresponding to this sensor node to the UC25 of network side; UC25 can obtain the sensor network group information corresponding to this sensor node from server 30 and be supplied to network gateway 14, and whether network gateway 14 is moved according to obtained sensor network group information Sampling network group; After determining that sensor network 11 is moved, the UC25 of its request network side carries out location updating to this sensor network group lower sensor node, is namely updated to network gateway 14 from original network gateway 13; Afterwards, network gateway 14 carries out local position renewal according to the acknowledge message of UC25, more under this network group, all the sensors node corresponds to addressable information in sensor network, corresponding to the mapping relations between the addressable information in access network, UC25 will send location updating to server 30 further, upgrade this control appliance parameter corresponding to sensor network group lower sensor node; Meanwhile, the communication node CN40 corresponding to sensor network group lower sensor node is also sent location updating by UC25, upgrades the access device address of its corresponding objective sensor node.
Fig. 3 carries out example explanation with sensor network group interregional mobility operation related signalling messages flow process, assuming that all the sensors node in sensor network 11 forms a sensor network group, this sensor network group moves to the network gateway 14 under territory 2 from the network gateway 13 territory 1.
Step S301, sensor node under the responsible sensor network connected by this gateway of network gateway 14 is to dissimilar access network, it periodically sends Beacon frame, the GW_EUI comprising this network gateway and the PAN_ID (personal area network) in global network with uniqueness thereof, Beacon frame can be the IEEE802.15.4 frame format of a standard, sensor node in sensor network 11 receives the Beacon frame of network gateway 14, send an Attach Request message to network gateway 14, this Attach Request message is by the SN_ID of carry sensors node, the information such as SN_EUI.Network gateway 14, after receiving Attach Request message, responds an attachment response message.Afterwards, network gateway 14 is by initiating further the verification process of this sensor node to judge the legitimacy (not illustrating in legend) of this sensor node
Step S304, the network group information that network gateway 14 can be asked corresponding to this sensor node to UC25, a kind of simple implementation, send a specific location update message to UC25, in conjunction with the network group request message example that legend 4 provides, the SN_ID of sensor node is comprised in the mobile option of described request message, the information such as SN_EUI, outside address (GW_IPv6) information of network gateway, the flag that one is used for asking this sensor node belonging network group will be comprised further in this request message, our called after " G " upgrades with the shift position being different from other types, " G " flag is set to " 1 " expression request and carries out network group shift position update process
Step S305, UC25 is responsible for the mobile management of sensor node, it is when receiving aforementioned request message, check whether " " and whether value is " 1 " to G to carry sensors network group flag, and the information such as the SN_ID of sensor node in request message, can judge the sensor node in this sensor node this territory 2 non-, UC25 will download network group and the involved sensor nodes attribute thereof of this sensor node to server 30, such as: SN_IPv6, GRID, CNIPv6 etc.
Step S306, UC25 sends to network gateway 14 by according to obtained network group information: a kind of simple implementation, it sends a specific location updating acknowledge message to network gateway 14, in conjunction with the network group acknowledge message example that legend 5 provides, carry sensors network group information in the mobile option of described acknowledge message, such as: network group identifies involved sensor nodes information under GR_ID and this group, outside, this acknowledge message is set to comprising a corresponding sensor network group identification position " G " further " 1 ";
Step S307, network gateway 14 can confirm sensor network group mobility further according to obtained sensor network group information, whether such as this gateway receives the attachment request of other subsequent sensor node under this group to judge moving integrally of this network group within a period of time, if confirm sensor network group mobility occurs, it sends a network group location update request message to the UC25 in territory, in conjunction with the message example that legend 6 provides, this location update message comprises the flag that is used to indicate sensor network group mobility " G ", the mobile option of this message is set to the group identification GR_ID of sensor network, and comprise address (GW_IPv6) information of this network gateway further.
Step S308, UC25 carry out location update operations according to aforementioned network group location update message to sensor nodes all under sensor network group GR_ID.That is: upgrade the network gateway GW address GW_IPv6.... etc. of each sensor node, so, the packet from CN is forwarded to new network gateway 14 by UC25.
Step S309, UC25 send network group location updating acknowledge message to network gateway 14; In conjunction with the message example that legend 7 provides, this acknowledge message comprises a flag " G " being used to indicate sensor network group mobility and upgrades with the shift position being different from other types; " G " flag is set to " 1 " expression and confirms the mobility location updating of network group; This network group mark GR_ID will be comprised in the mobile option of this acknowledge message.
Further, UC25 by the net-work parameter information CN_EUI of the corresponding target communication device of the sensor node under this mobile network group, CN_IPv6 etc., also can be supplied to network gateway 14 by aforementioned network group location updating acknowledge message.
Step S310, all the sensors node under network gateway 14 couples of sensor network group GR_ID carries out location update operations, that is: the mapping relations between aforementioned SN_ID, SN_EUI and SN_IPv6 are set up, under which, the packet that under network group, all the sensors node communicates with between node CN will be forwarded by UC25.
Further, if aforementioned location upgrades the net-work parameter information CN_EUI that acknowledge message comprises the Correspond Node CN40 of mobile sensor node, CN_IPv6 etc., network gateway 14 communicates with mapping relations between node by setting up network group lower sensor node further, under which, the packet that sensor node communicates with between node directly can carry out data retransmission by network gateway 14
Step S311, UC25 carries out location update operations to server 30, upgrade network address GW---the network address UC_IPv6 of IPv6, UC25 of this access network gateway GW corresponding to network group GR_ID lower sensor node, to maintain the accuracy of the relevant information of all the sensors node in the overall situation.
Step S312, server 30 carries out location updating confirmation to UC25;
It will be appreciated by those skilled in the art that, for supporting cross domain mobility management, server 30 record maintains all the sensors nodal information in the overall situation, except exemplified by step S310, S311, when other network of relation parameter of sensor node 11A changes, such as: CN node changes, also need to carry out relevant updates operation with the accuracy of the relevant information to maintain all the sensors node in the overall situation to server 30, its corresponding renewal rewards theory can be initiated by UC or gateway according to actual conditions.
Step S313, UC25 notifies that the communication node of all the sensors node carries out location update operations under this network group, control appliance address UC_IPv6 corresponding to network group lower sensor node can be sent to communication node CN40 as destination address by UC25, notifies that first all data that it mails to this network group lower sensor node will send to UC25.
In the location update operations of abovementioned steps S312, network gateway 14 address GW_IPv6 corresponding to this network group lower sensor node can be sent to their communication node CN by UC25 as destination address, all data telling it to mail to this sensor node will directly send to network gateway 14.
Step S314, the communication node CN of network group lower sensor node carries out location updating confirmation to UC25.
Be illustrated as although above-mentioned and the invention provides some embodiments; not be used for limiting protection scope of the present invention; those skilled in the art can understand further, can realize in conjunction with the various illustrative logic module described by embodiment disclosed herein or step as electronic hardware, computer software or the combination of the two.In order to clearly demonstrate the interchangeability between hardware and software, various illustrative logic module or step generally functionally to be set forth according to it.The specific application program that these are functional realizes depending on that whole system adopts as hardware or software actually and design.Technical staff can recognize the interactivity of hardware and software in these situations, and how to realize the described function of each application-specific best.Technical staff may realize described function in the mode different for each application-specific, but this realization determines should not be interpreted as causing deviating from scope of the present invention.
Claims (12)
1. an auxiliary method of sensor network group being carried out to mobile management in network gateway, is characterized in that comprising:
Steps A), whether there is sensor network group mobility under determining network gateway;
Step B), when sensor network group is moved, the control appliance of request network side carries out location updating to the network gateway corresponding to this sensor network group lower sensor node;
Step C), the acknowledge message according to control appliance carries out local position renewal, upgrades this sensor network group lower sensor node corresponding to the addressable information in sensor network, corresponding to the mapping relations between the addressable information in access network;
Wherein, described steps A) comprising:
Steps A 1), network gateway when a sensor node is moved, to the sensor network group information of its correspondence of control appliance request of network side;
Steps A 2), whether be moved according to obtained sensor network group information detecting sensor network group.
2. the method for claim 1, is characterized in that described steps A 1) in sensor network group information at least comprises sensor network group identification, this group's lower sensor node corresponds to network parameter in sensor network.
3. the method for claim 1, it is characterized in that step B) in, network gateway generates a location update request message, comprises sensor network group identification, flag that corresponding network gateway information and one are used to indicate sensor network group mobility.
4. the method for claim 1, is characterized in that step C) in, network gateway, according to the acknowledge message of control appliance, upgrades further this destination communication node information corresponding to sensor network group lower sensor node.
5. in control appliance, sensor network group is carried out to a method for mobile management, it is characterized in that comprising:
Steps A), obtain sensor network group information to network gateway;
Step B), according to the sensor network group position updating request of network gateway, local position update process is carried out to the sensor node under described sensor network group, upgrades this network gateway parameter corresponding to sensor network group lower sensor node;
Step C), carry out sensor network group location updating to network gateway and confirm;
Wherein, described step B) comprise further:
Step B1), send location updating to one for the server preserving sensor network group information, upgrade this network gateway corresponding to sensor network group lower sensor node and control appliance address;
Step B2), the destination communication node corresponding to sensor network group lower sensor node sends location updating, upgrades the access device address of its respective sensor node.
6. method as claimed in claim 5, is characterized in that described steps A) described sensor network group information comprises sensor node information under network group mark, this group.
7. method as claimed in claim 6, is characterized in that described steps A) sensor network group information comprises destination communication node information corresponding to this group's lower sensor node further.
8. method as claimed in claim 5, is characterized in that the network gateway address of described access device address corresponding to sensor network group or control appliance address.
9. method as claimed in claim 5, it is characterized in that described step C) in sensor network group location updating confirm at least to comprise: this sensor network group lower sensor node corresponds to the addressable information in access network, and a flag being used to indicate sensor network group mobility.
10. carry out a communication system for mobile management for sensor network group, comprising:
Network gateway: under Sampling network gateway, whether sensor network group mobility occurs, the control appliance of request network side carries out location updating to the network gateway corresponding to this sensor network group lower sensor node, and carry out local position renewal according to the acknowledge message of control appliance, upgrade this sensor network group lower sensor node corresponding to the addressable information in sensor network, corresponding to the mapping relations between the addressable information in access network;
Control appliance: carry out local position update process to the sensor node under described sensor network group, upgrades this network gateway parameter corresponding to sensor network group lower sensor node; And
Server, for preserving sensor network group information, comprises all the sensors node parameter and respective objects communication equipment parameter thereof under this group.
11. communication systems as claimed in claim 10, is characterized in that described control appliance sends location updating to described server further, upgrade this control appliance parameter corresponding to sensor network group lower sensor node.
12. communication systems as claimed in claim 10, is characterized in that described control appliance sends location updating parameter to the target communication device that sensor network group lower sensor node is corresponding, upgrade the access device address of its respective sensor node.
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| WO2009014297A1 (en) * | 2007-07-26 | 2009-01-29 | Electronics And Telecommunications Research Institute | Apparatus and method for supporting mobility of sensor node in ip-based sensor networks |
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| CN101286912A (en) * | 2008-03-05 | 2008-10-15 | 中科院嘉兴中心微***所分中心 | Mobile terminal assisted wireless sensor network information acquisition method |
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