CN108934024A - The optimization method of tree network based on 6LoWPAN wireless sensor network - Google Patents
The optimization method of tree network based on 6LoWPAN wireless sensor network Download PDFInfo
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- CN108934024A CN108934024A CN201810573700.8A CN201810573700A CN108934024A CN 108934024 A CN108934024 A CN 108934024A CN 201810573700 A CN201810573700 A CN 201810573700A CN 108934024 A CN108934024 A CN 108934024A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/02—Standardisation; Integration
- H04L41/0246—Exchanging or transporting network management information using the Internet; Embedding network management web servers in network elements; Web-services-based protocols
- H04L41/0253—Exchanging or transporting network management information using the Internet; Embedding network management web servers in network elements; Web-services-based protocols using browsers or web-pages for accessing management information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
- H04L41/0663—Performing the actions predefined by failover planning, e.g. switching to standby network elements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
- H04L41/0668—Management of faults, events, alarms or notifications using network fault recovery by dynamic selection of recovery network elements, e.g. replacement by the most appropriate element after failure
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/04—Arrangements for maintaining operational condition
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
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Abstract
The present invention relates to a kind of optimization methods of tree network based on 6LoWPAN wireless sensor network, and steps are as follows：The tree network of first step configuration optimization：6LoWPAN system is built jointly by 3 class nodes, and 3 class nodes are border routing C respectively, commonly route R, terminal node S, different functions is respectively undertaken, border routing configuration function is all added in border routing and common routing program, router is set root node by border routing function；Network capacity is detected, network capacity refers to the number of each router lower node；Priority is set in border routing and common routing, priority 0,1,2,3 ... ..., wherein 0 highest priority, 1 takes second place, and so on；Priority is set according to network capacity, the small priority of network capacity is high；Second step starts improved 6LoWPAN network；The routing of third step edge is broken down, and is become the border routing that becomes that address is unreachable, and priority is 1 at this time, is started border routing configuration function, re-start networking.
Description
Technical field
The present invention relates to a kind of network optimized approach.
Background technique
With the fast development of internet, the address IPV4 is almost exhausted, and IPV6 technology is come into being.Internet of Things at the same time
Technology is also flourishing, and the addressing issue for solving internet of things equipment of IPV6 technological perfectionism, people combine two kinds of technologies
6LoWPAN network is had developed, wireless sensor network is used for, Internet technology is transplanted among Internet of Things, inevitably
Such a problem can be encountered, it should choose any topological structure, tree structure has the shortcomings that its is intrinsic, and routing failure will
Cause whole network to be paralysed, but because structure is simple, is suitable for 6LoWPAN network at this stage, therefore devise one kind herein
The optimization method of tree topology based on 6LoWPAN network.
IPv6 is derived from IP framework, is next version of IPv4 agreement, for solving the problems, such as some existing for IPv4 and limit
System.For the application demand of Internet of Things, have the function of following improve compared to IPv4, IPv6：
1, increase address space.The 32 bit address positions compared to IPv4, in IPv6 agreement, address space extension to 128
Position, it is possible to provide up to 3.4 × 10^38 address can sufficiently meet the volume of the access device of vast number in thing network sensing layer
Location demand.
2, optimization automatically configures function.In IPv4 dynamic host configuration protocol (Dynamic Host Configuration
Protocol, DHCP) on the basis of, IPv6 agreement advanced optimizes the function, realizes and statelessly automatically configures.
3, datagram header is simplified.The header of IPv6 is using basic header and multiple extension headers (Extension Header)
Combined form deletes segmentation useless in several IPV4 headers, verifies and wait fields, adds the new word such as stream label
Section.
4, safety is promoted.IPv6 uses IPSec (Internet protocol safety) frame structure, in conjunction with embedded net
Network layers encrypted authentication system, sufficiently promotion security feature.
5, stronger mobility.
To run IPv6 agreement in such physical layer and data link layer framework, it is necessary to solve following ask
Topic：
(1) acquisition of the address IPv6.IEEE 802.15.4 provides 64 addresses IEEE and 16 are netted interior two kinds of short address and sought
Location mode, it is contemplated that obtain the address IPv6 using both modes, or use other way, such as hardware mode.
(2) limitation of maximum transmission unit (Maximum Transmission Unit, MTU).The definition of RFC2460 document
1280 byte of maximum transmission unit of IPv6 agreement, and after removing own overhead, the data link layer of IEEE 802.15.4 is most
Multipotency provides the payload length of 102 bytes, and data link layer is needed to come fragment and the recombination of tissue data packet.
(3) ipv6 header is compressed.IEEE 802.15.4 physical layer frame length limit is 127 bytes, and in IPv6 message
Fixed header will occupy 40 bytes, need to introduce header compression mechanisms to be improved.
(4) lightweight TCP/IPv6 agreement.The totally unnecessary complete TCP/ of operation on thing network sensing layer access device
IPv6 agreement, it is empty to power consumption, cost, storage that the related sub-protocol of cutting appropriate can preferably adapt to IEEE 802.15.4 network
Between etc. requirement.
(5) optimize routing mechanism.The more existing link-state routing protocol being widely used in internet and distance
Vector route agreement is not suitable for resource-constrained thing network sensing layer access device.Therefore, it is necessary to be directed to the phase of Internet of Things
Application and characteristic are closed, Routing Protocol is optimized.
(6) it statelessly automatically configures.Thing network sensing layer access device needs to carry out certainly in the case where unmanned intervene
Dynamic networking and configuration, and can be rapidly added/be detached from a network organization.
6LoWPAN is to be combined WSN and IPV6, for solving the Next Generation Internet IPV6 of wireless sensor network
Sensing layer technology, no matter its power consumption, coverage area are also or safety can be fully protected, the master of 6LoWPAN technology
Wanting thought is one adaptation layer of addition between IPV6 network layer and MAC layer, is had been provided to the necessary support of IPV6.6LoWPAN
Be intended on IEEE802.15.4 using IPV6 technology, be that should be IPV6 technology relative to ZigBee, IEEE1415 etc. other
Technology has incomparable advantage.
1) popularization:IP network is widely used, and is rooted in the hearts of the people, and as the IPv6 of Next Generation Internet core technology, is also existed
Accelerate its universal paces, is easier to be received using IPv6 in LR-WPAN network.
2) open:IP agreement is open agreement, does not involve complicated Problem of Property Rights, this 6LoWPAN technology relative to
The advantage of ZigBee technology.
3) applicability:IP network protocol stack architecture receives extensive approval, and LR-WPAN network can be based on this completely
Structure carries out simple, effective exploitation.
4) more address spaces:It is exactly huge address space that IPv6, which is applied to the maximum bright spot of LR-WPAN, this is exactly full
Foot deployment is extensive, the high density LR-WPAN network equipment needs.
5) stateless address autoconfiguration is supported:In IPv6 when node starts, MAC Address, and root can be read automatically
The address IPv6 needed for being configured according to dependency rule.This characteristic is very attractive for LR-WPAN network, because
In most cases, it is impossible to user interface be configured to LR-WPAN node, node, which must have, automatically configures function.
6) easily access:LR-WPAN uses IPv6 technology, makes it easier for accessing other networks based on IP technology, including
Next-generation Internet allows to make full use of the technology of IP network to be developed.
There are three types of be respectively 6LoWPAN network topology structure：Hub-and-spoke configuration, tree, reticular structure.In tree
Only one father node of each node, at a certain moment communicated between two nodes, path is unique.Tree network structure letter
Single, management service is convenient, but works as one of routing node operation irregularity, and child node just needs to find new father node again
New routing is established, i.e., the exception of one routing can bring about multiple child node short time communication abnormalities being associated.It is netted
Each node may have multiple father nodes in structure, and the path between two nodes can have a plurality of.When one of routing work
When making abnormal, network node associated therewith still has other paths to connect network, compared with tree network, communication
Stability it is higher, and from traffic load it is balanced from the point of view of, mesh network is easier to realize that traffic load is balanced.Star-like knot
Network forming network is simplest network, only one routing in whole network can be referred to as center routing, remaining all node
It is connected directly with central node, is point-to-point communication mode, loaded for central node larger, but manage simple side
Just, it is suitable for the lesser network of data volume.
Summary of the invention
It is directed to edge router to go wrong the problem of leading to entire 6LoWPAN network paralysis, the present invention proposes one kind
The method for improving tree network, solves the problem of data jamming network paralysis, can construct new net within a short period of time
Network realizes the lossless upload of data and accurately issuing for order, guarantees that network operates normally.Technical solution is as follows：
A kind of optimization method of the tree network based on 6LoWPAN wireless sensor network, steps are as follows：
The tree network of first step configuration optimization
1) 6LoWPAN system is built jointly by 3 class nodes, 3 class nodes are border routing C respectively, commonly route R, terminal
Node S respectively undertakes different functions, and border routing configuration function, side is all added in border routing and common routing program
Boundary routes function and sets root node for router；
2) network capacity is detected, network capacity refers to the number of each router lower node；
3) priority, priority 0,1,2,3 ... ... are set in border routing and common routing, wherein 0 priority is most
Height, 1 takes second place, and so on；
4) priority is arranged according to network capacity, the small priority of network capacity is high.
Second step starts improved 6LoWPAN network
First starting edge routing, restarts common routing, finally starts terminal node, if the flashings such as LED have represented network
Completion is built, network at this time is the improvement network based on 6LoWPAN tree network.
The routing of third step edge is broken down, become that address is unreachable, and priority is 1 to become border routing at this time, is opened
Moving boundary routing configuration function, re-starts networking.
Beneficial effects of the present invention are as follows：
1. this patent proposes a kind of optimization method based on 6LoWPAN wireless sensing tree network, 6LoWPAN can be improved
The shortcomings that network tree-shaped structural network, extends data and uploads the period when network occurs abnormal, again after networking, restores normal
The problem of upload, data can not upload caused by avoiding because of node failure, and the data short time is caused to lack.
2. this patent is centered on improving border routing, because border routing is unique discrepancy of entire 6LoWPAN network
Mouthful, failure causes consequence extremely serious, and whole network will sink into state of paralysis, can be short after being improved using this method
Automatic network-building is realized in time, is redefined border routing, is not repaired manually, realizes the lossless upload of data.
Detailed description of the invention
Fig. 1 6LoWPAN network topology
Fig. 2 protocol procedures
Improvement network of the Fig. 3 based on 6LoWPAN tree network
Specific embodiment
With flourishing for Internet of Things and gradually popularizing for IPV6 technology, it is applied to wireless sensing for what the two combined
The next-generation IPV6 sensing layer technology of network is gradually shown up prominently.There are mainly three types of node, network coordinators in 6LoWPAN network
It is that the initiation establishment person of 6LoWPAN network combines the function of routing, disposes the data acquisition network based on 6LoWPAN and answer
Corresponding network coordinator is realized in the design.Network router plays the role of message routing in 6LoWPAN network, and data are adopted
Collecting system bottom should dispose corresponding router covering pickup area, provide communication infrastructure for data transmission.Due to network road
It is deployed on monitored end by device, while also having acquisition function, it is contemplated that selected hardware platform TI series monolithic performance
It can satisfy the task of data acquisition, to save data collection station quantity, reduce hardware cost, designed network router
Function in addition to undertaking message routing, also carries the task of data acquisition.Data collection station is that 6LoWPAN network data is adopted
The front end of collecting system is also the network node in bottom data acquisition network.Network node types are usually set to terminal section
Point, to enter sleep state when no data acquisition session, to reduce power consumption.Terminal is able to respond server behaviour
It instructs, real-time data collection and real time data uploaded to server by 6LoWPAN network, edge router.6LoWPAN net
Network topology is as shown in Figure 1.
By Fig. 1 it can be seen that the topological structure of 6LoWPAN network, edge router are logical as 6LoWPAN network and outside
The unique interface of letter has highly important effect, and IPV6 network may be implemented and merge with the isomery of 6LoWPAN network, realizes
Interactively communicating from page end to terminal node, if edge router, which goes wrong, will lead to the paralysis of entire 6LoWPAN network
Paralysis.
The problem of being directed to edge router to go wrong, leading to entire 6LoWPAN network paralysis, the present invention proposes one kind
The method for improving tree network, solves the problem of data jamming network paralysis.New net can be constructed within a short period of time
Network realizes the lossless upload of data and accurately issuing for order, guarantees that network operates normally.
The basic thought of this patent is：In the data collection system entirely based on 6LoWPAN network, edge router is
Unique bridge of IPV6 network and sensing layer 6LoWPAN network is linked up, so the operating status of edge routing is most important, it is necessary to
There is corresponding measure to solve to route the abnormal situation for causing data that can not upload because of edge, this patent is based on 6LoWPAN network
Tree proposes a kind of optimization method, avoids network communication abnormal.
The protocol procedures such as following figure such as Fig. 2, specific step is as follows：
The tree network of 1 configuration optimization
In this patent, 6LoWPAN system is built jointly by 3 class nodes, 3 class nodes are border routing C, common road respectively
By R, terminal node S, different functions is respectively undertaken, the contiki system being embedded in node chip has been integrated with 6LoWPAN
Protocol stack can be used for building 6LoWPAN network, respectively be loaded into each node procedure in node by Jlink.
Step 1：Border routing configuration function simple_rpl_ is all added in border routing and common routing program
init_dag().Border routing function can set root node for router
Step 2：Network capacity is detected, network capacity refers to the number of each router lower node
Step 3：Priority, priority 0,1,2,3 ... ..., wherein 0 is excellent are set in border routing and common routing
First grade highest, 1 takes second place, and so on.
Step 4：Priority is set according to network capacity, the small priority of network capacity is high.
Step 5：The routing that priority is 0,1,2 connects cable.
The 2 improved 6LoWPAN networks of starting
First starting edge routing waits four LED light of edge routing to flash, and representative, which has been started up, to be finished, and restarts
Common routing waits LED flashing, finally starts terminal node, if the flashings such as LED, which represent network, has built completion, at this time
Network is the improvement network based on 6LoWPAN tree network.Such as Fig. 3
Step 1：Node is turned on power supply, the routing of starting edge, and four LED light flash then start completion.
Step 2：The common routing of starting, four LED light flash then start completion.
Step 3：Start terminal node, four LED light flash then start completion.
After 3 verifying border routing failures, if can networking again.
Cable at edge routing is extracted, web terminal is opened, checks concrete condition, it is found that alarm module prompt, edge
Routing is abnormal, has successfully configured new edge routing, and normal reported data.Again the cable at border routing is plugged, is opened
Web terminal checks concrete condition, the network structure regulation of node administration module, and edge routing is re-used as gateway, and management is entire
6LoWPAN network.
Step 1：The cable of edge routing is extracted, network failure is caused, server and 6LoWPAN network will be connected
Unique path cutting.
Step 2：Check whether web terminal, data normally upload, then cut off if abnormal, network failure.
Step 3：Priority is detected, network failure finds highest priority, is set as edge router.
Step 4：Check LED light whether all light, networking again, checks web terminal if all light, checks whether data normal
It uploads.It uploads if normal, then new network is reliable.
4 program descriptions
The node initializing is border routing by border routing configuration function simple_rpl_init_dag ()；Priority
It is arranged function set_rpl_init_priority (), for the priority of node to be arranged, priority is higher to be used as boundary road
By.The priority of border routing is set as 0, priority is arranged according to initial network capacity is commonly routed, network capacity is common
The number of access terminal node is routed, the small priority of network capacity is high, is followed successively by 1,2,3 ..., event occurs when edge routes
Barrier becomes the border routing that becomes that address is unreachable, and priority is 1 at this time, starts border routing configuration function, re-start group
Net.When staff is by the border routing reparation of failure, after networking again, highest priority is 0, and data upload the period at this time
Extend, reconfigures border routing, again networking.
This patent is suitable for having very much versatility, nothing using 6LoWPAN network as the data acquisition processing system of sensing layer
Platform can be built by agricultural or industry, is asked for handle that data caused by due to border routing failure can not upload
Topic, bottom uses the wireless sensor network of 6LoWPAN network, and is the data collection system of tree-network topology, using this
Kind improved method can reach data lossless upload.Although can be changed according to the time of the size ad hoc network of network capacity,
It is only uplink time delay, caused by not interrupting temporarily because of network, data degradation occurs.It can be good at playing maintenance network
Stable effect.In order to obtain optimal effectiveness, network capacity be should not be too large.
Claims (1)
1. a kind of optimization method of the tree network based on 6LoWPAN wireless sensor network, steps are as follows：
The tree network of first step configuration optimization
1) 6LoWPAN system is built jointly by 3 class nodes, 3 class nodes are border routing C respectively, commonly route R, terminal node
S respectively undertakes different functions, and border routing configuration function, boundary road are all added in border routing and common routing program
Root node is set by router by function；
2) network capacity is detected, network capacity refers to the number of each router lower node；
3) priority is set in border routing and common routing, priority 0,1,2,3 ... ..., wherein 0 highest priority, 1
Take second place, and so on；
4) priority is arranged according to network capacity, the small priority of network capacity is high.
Second step starts improved 6LoWPAN network
First starting edge routing, restarts common routing, finally starts terminal node, if the flashings such as LED represent network and taken
Completion is built, network at this time is the improvement network based on 6LoWPAN tree network.
The routing of third step edge is broken down, and is become the border routing that becomes that address is unreachable, and priority is 1 at this time, is started side
Boundary's routing configuration function, re-starts networking.
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| CN201810573700.8A CN108934024B (en) | 2018-06-06 | 2018-06-06 | Optimization method of tree-structure network based on 6LoWPAN wireless sensor network |
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Cited By (2)
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| CN110363980A (en) * | 2019-07-25 | 2019-10-22 | 四川长虹电器股份有限公司 | LoRa acquisition device and its acquisition method based on TDMA and Contiki |
| CN111432043A (en) * | 2020-03-09 | 2020-07-17 | 清华大学 | Dynamic IPv6 address detection method based on density |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110363980A (en) * | 2019-07-25 | 2019-10-22 | 四川长虹电器股份有限公司 | LoRa acquisition device and its acquisition method based on TDMA and Contiki |
| CN111432043A (en) * | 2020-03-09 | 2020-07-17 | 清华大学 | Dynamic IPv6 address detection method based on density |
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