CN107659503A - Service protecting method and system for energy-constrained network - Google Patents
Service protecting method and system for energy-constrained network Download PDFInfo
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- CN107659503A CN107659503A CN201610591435.7A CN201610591435A CN107659503A CN 107659503 A CN107659503 A CN 107659503A CN 201610591435 A CN201610591435 A CN 201610591435A CN 107659503 A CN107659503 A CN 107659503A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/54—Organization of routing tables
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
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Abstract
The invention discloses a kind of service protecting method and system for energy-constrained network, it is related to Internet technical field.Method therein includes：First node obtains the full message of section point routing table, and the section point is the upstream father node of first node；First node sends the routing table information of first node to the 3rd node, the 3rd node be and routing table identical with section point network hierarchy less than upstream father node.So as to alleviate due to the problem of intermediate node routing table completely causes partial service to fail.
Description
Technical field
The present invention relates to Internet technical field, the fault handling method of more particularly to a kind of load-balancing paths and it is
System.
Background technology
Low-consumption wireless personal area network 6Lowpan based on IPv6, the Internet of Things based on Next Generation Internet standard
IPv6 agreements, traditional IPv6 messages are compressed and optimized for Internet of Things low-power consumption environment,
6LN (6Lowpan Node, Lowpan leaf node) in current 6lowpan networks can pass through 6LR (6Lowpan
Router, 6Lowpan router) or 6LBR (6Lowpan Border Router, 6Lowpan border router) set up have
To acyclic topology access, the 6LR sensing nodes of carry sensors preserve the advertising of route from downstream node.All kinds of 6Lowpan
The sensor RAM capacity of sensing node is different, for example, NanoStack 2.0CC2530 are in low-power consumption lossy networks Routing Protocol
In routing list capacity be only 40.When downstream node issues more prefix, the 6LR of intermediate node is easily because routing table is completely made
Overflowed into prefix and prefix abandons, so as to cause partial service to fail.
The limited storage capacity of low-power consumption 6Lowpan nodes easily makes 6LR sensing node routing table saturations at present, can bring
Problems with：
The content of the invention
A technical problem to be solved by this invention is：How slowly solution completely causes part due to intermediate node routing table
The problem of service failure.
One side according to embodiments of the present invention, there is provided a kind of service protecting method for energy-constrained network,
It is characterised in that it includes：First node obtains the full message of section point routing table, and section point is the upstream father of first node
Node；First node sends the routing table information of first node to the 3rd node, and the 3rd node is and section point network hierarchy
Identical and routing table less than upstream father node.
In certain embodiments, in addition to：First node is sent in the case where not finding the 3rd node to section point
First notification message, the first notification message include the IP address of first node and the first node routing table information of overload, with
Just section point carries out service protection according to the information carried in the first notification message by the way of source routing.
In certain embodiments, section point carries out service protection by the way of source routing includes：Section point is to
Four nodes send second notification message, and second notification message includes：The full identification information of section point routing table, the first of overload
Node route list information, the IP address of first node, the IP address of section point, so that fourth node is according to second notification message
The information of middle carrying carries out service protection by the way of source routing；The fourth node is the upstream father node of section point.
In certain embodiments, fourth node is entered according to the information carried in second notification message by the way of source routing
Row service protection includes：The information that fourth node storage second notification message carries；Fourth node finds that destination node belongs to super
During node in the routing table information of the first node of load, under being sent according to the information that second notification message carries to section point
Row message, the IP address of section point and the IP address of first node are carried in the header of downlink message.
In certain embodiments, section point deletes the IP address of section point in the header of downlink message, and according to the
The IP address of one node is to first node converting downlink message.
In certain embodiments, energy-constrained network is the low-power wireless personal area network based on IPv6 agreements
6Lowpan。
One side according to embodiments of the present invention, there is provided a kind of service protecting method for energy-constrained network,
Including：Section point receives the first notification message from first node, and section point is the upstream father node of first node, and first is logical
Know that message includes the IP address of first node and the first node routing table information of overload.；Section point is according to the first notice
The information carried in message carries out service protection by the way of source routing.
In certain embodiments, section point carries out service protection by the way of source routing includes：Section point is to
Four nodes send second notification message, the side so as to fourth node according to the information carried in second notification message using source routing
Formula carries out service protection；Wherein, second notification message includes the full identification information of section point routing table, the first node of overload
Routing table information, the IP address of first node, the IP address of section point；The fourth node is the upstream father section of section point
Point.
In certain embodiments, fourth node is entered according to the information carried in second notification message by the way of source routing
Row service protection includes：The information that fourth node storage second notification message carries；Fourth node storage second notification message is taken
The information of band；When fourth node finds the node in the routing table information of the destination node first node that belongs to overload, according to the
The information that two notification messages carry sends downlink message to section point, the IP of section point is carried in the header of downlink message
Location and the IP address of first node.
In certain embodiments, section point deletes the IP address of section point in the header of downlink message, and according to the
The IP address of one node is to first node converting downlink message.
One side according to embodiments of the present invention, there is provided a kind of service protection system for energy-constrained network,
It is characterised in that it includes first node, section point, first node therein includes：Message capturing module, for obtaining second
The full message of node route list；Information sending module, for the 3rd node send first node routing table information, Section three
Point be and routing table identical with section point network hierarchy less than upstream father node.
In certain embodiments, the information sending module of first node is additionally operable to not find the 3rd node in first node
In the case of, the first notification message is sent to section point, IP address and overload of first notification message including first node
First node routing table information, so that section point is entered according to the information carried in the first notification message by the way of source routing
Row service protection.
In certain embodiments, section point includes：Negotiation module, for sending second notification message to fourth node,
Second notification message includes：The full identification information of section point routing table, the first node routing table information of overload, first node
IP address, the IP address of section point, so that fourth node uses source routing according to the information carried in second notification message
Mode carry out service protection；The fourth node is the upstream father node of section point.
In certain embodiments, the system also includes fourth node, and fourth node includes：Information storage module, for depositing
Store up the information that second notification message carries；Source routing module, find that destination node belongs to the first segment of overload for fourth node
Point routing table information in node when, according to second notification message carry information to section point send downlink message, under
The IP address of section point and the IP address of first node are carried in the header of row message.
In certain embodiments, section point also includes：Source routing module, second in the header for deleting downlink message
The IP address of node, and according to the IP address of first node to first node converting downlink message.
In certain embodiments, energy-constrained network is the low-power wireless personal area network based on IPv6 agreements
6Lowpan。
The service protecting method for energy-constrained network of the present invention can be alleviated because intermediate node routing table is completely made
The problem of being failed into partial service.
By referring to the drawings to the present invention exemplary embodiment detailed description, further feature of the invention and its
Advantage will be made apparent from.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
To obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 shows that the present invention is used for the schematic flow sheet of one embodiment of the service protecting method of energy-constrained network.
Fig. 2 shows that the present invention is used for the structural representation of one embodiment of the service protection system of energy-constrained network.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.Below
Description only actually at least one exemplary embodiment is illustrative, is never used as to the present invention and its application or makes
Any restrictions.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, belongs to the scope of protection of the invention.
By taking 6Lowpan as an example, as shown in figure 1, after 6Lowpan automatically generates directed acyclic topology, mutually may be used between node
Reach.The network hierarchy RANK values of each node represent the hierarchical position of each node in the entire network.Wherein, RANK values can be with
According to the signal intensity of Radio Link, the stability of link, the hop count of node to 6LBR, node type, node power situation, section
Point performance, link are expected the factors such as type, the importance of junction sensor, node and the bit error rate of neighbours of bearer service and carried out
Comprehensive estimate, to determine the position of whole node in a network.The lower node of RANK numerical value possesses better performance, more
Resource, more stable link-quality and distance shorter 6LBR.Therefore, there is the node of identical RANK values, represent the two sections
Point is in same level in the entire network, apart from root node 6LBR levels apart from identical.Child node RANK values different from two
Node when having signal connection, preferential only selection be less than itself RANK value still the relatively small node of RANK values for father node with
Avoid loop.
Assuming that determine that 6LRA, 6LRB, 6LRC, 6LRD RANK values are respectively 144,126,18,126 according to topological structure,
6LRA preferably 6LRB from 6LRB and 6LRD are father node.In the prior art, after network topology formation, 6LRA passes through DAO
(Data Access Object, DAO) message upstream father node 6LRB transmissions 6LRA routing table, 6LRB will
Continue for DAO message to be transmitted to 6LRB upstream father node 6LRC after routing table storage, upstream father node 6LRC continues to store
Routing table is simultaneously transmitted to upstream father node until 6LBR.When 6LRB routing tables are full, if 6LRA continues to disappear to 6LRB transmissions DAO
During breath, B can not preserve the routing table in the DAO message, and then acquiescence abandons the DAO message and follow-up all include newly route
DAO message, and upstream father node 6LRC forwards follow-up DAO message, causes to route the service traffics of lack part not
It is reachable.
The fault handling method of the load-balancing paths of one embodiment of the invention is described with reference to Fig. 1.Wherein, second
Node 6LRB is first node 6LRA upstream father node, the 3rd node 6LRD be it is identical with section point 6LRB network hierarchies and
Routing table less than upstream father node, fourth node 6LRC is section point 6LRB upstream father node.
The fault handling method of load-balancing paths in the embodiment comprises the following steps：
Step S100, section point detect that local routing table completely triggers overload request, and section point is to direct-connected downstream
First node sends the full message of routing table, and first node obtains the full message of section point routing table, and section point is first
The upstream father node of node.
For example, 6LRB detects that local routing table completely triggers overload request, 6LRB is to direct-connected downstream first node 6LRA
Send the full message of routing table, notice 6LRA find and routing table identical with 6LRB network hierarchies less than upstream father node.
Step S102, first node search out the 3rd node be and routing table identical with section point network hierarchy less than
Upstream father node, first node send the routing table information of first node to the 3rd node, to inform the 3rd node storage second
Node completely fails the routing table information of the first node of storage because of routing table.
For example, after 6LRA obtains the full message of 6LRB routing tables, it is identical with 6LRB network hierarchies that 6LRA, which searches out 6LRD,
And routing table less than upstream father node, hereafter 6LRA will should send to 6LRB routing table information and send to 6LRD, 6LRD
And routing table identical with 6LRB network hierarchies less than upstream father node.
By the above method, in the case where intermediate node 6LRB routing tables are full, downstream node 6LRA it can be found that with
6LRB with network hierarchy and routing table less than upstream father node 6LRD, and 6LRA part routing table is stored in 6LRD,
So as to alleviate due to 6LRB routing tables it is full caused by partial service fail the problem of.
With reference to the fault handling method of the load-balancing paths of description another embodiment of the present invention.In above-mentioned implementation
On the basis of example, the fault handling method of the load-balancing paths in the embodiment is further comprising the steps of：
Step S104, first node send the first notice in the case where not finding the 3rd node, to section point
Message, by first node be not present with section point identical network grade and routing table less than the situation of upstream father node inform
Section point, so that section point carries out business guarantor according to the information carried in the first notification message by the way of source routing
Shield.Wherein, the first notification message includes the IP address of first node and the first node routing table information of overload.
Step S106, after section point receives the first notification message of first node transmission, learn first node not
There is a situation where with section point identical network grade and routing table less than upstream father node.Then section point is to Section four
Point sends second notification message, and the full situation of section point routing table is informed into fourth node, so as to fourth node storage second
The information carried in notification message, and service protection is carried out by the way of source routing.Second notification message includes：Section point
Routing table full identification information, the first node routing table information of overload, the IP address of first node, the IP of section point
Location.
Step S108, fourth node store the information carried in second notification message.
Step S110, fourth node find the node in the routing table information for the first node that destination node belongs to overload
When, downlink message is sent to section point according to the information that second notification message carries, carried in the header of the downlink message
The IP address of section point and the IP address of first node, so as to the IP address of first node of the section point in header
The descending insulation is received, and the IP address of the section point in header is forwarded the packet in a manner of source routing to first segment
Point.
Step S112, section point deletes the IP address of section point in the header of downlink message, and according to first node
IP address to first node converting downlink message.
Still by taking Fig. 1 as an example, 6LRA is sent in the case where not finding to exist with 6LRB identical network hierarchy nodes to 6LRB
The notification message of identical network hierarchy node is not found, and not finding the notification message of identical network hierarchy node includes 6LRA IP
Address and the routing table information of overload, so that 6LRB uses source road according to 6LRA IP address and the routing table information of overload
By mode carry out service protection.
After 6LRB receives the notification message for not finding identical network hierarchy node, assisted with upstream father node 6LRC
Business, consulting content is both sides while supports route memory module and source routing pattern, TTL (the Time To in negotiation packet
Live) value is 1 expression negotiation packet transmission not cross-node.After consulting successfully, 6LRB forwards message, the message package of forwarding to 6LRC
The full identification information of 6LRB routing tables, the 6LRA routing table informations of overload, 6LRA IP address, 6LRB IP address are included, so as to
6LRC carries out service protection according to the information carried in forwarding message by the way of source routing.
The information that 6LRC storage forwarding message carries.When sending downlink message, 6LRC has found that destination node belongs to overload
6LRA routing table information in node when, according to forwarding message carry information to 6LRB send downlink message, descending report
6LRB IP address and 6LRA IP address are carried in the header of text.
After 6LRB receives downlink message, the IP address of the outermost 6LRB in the header of downlink message is deleted,
And according to the IP address of the 6LRA of this outer layer in the header of downlink message, to 6LRA converting downlink messages in a manner of source routing.
In above method embodiment, in the case where intermediate node routing table overloads, intermediate node can save with upstream father
Point is held consultation, and is operated with the hybrid mode of storage route and source routing, the routing table of overload is stored to middle node
The upstream father node of point, ensures the transmission of downlink message, alleviates because intermediate node routing table completely causes partial service to fail
The problem of.
The service protection system for energy-constrained network of one embodiment of the invention is described with reference to Fig. 2.
Fig. 2 shows that the present invention is used for the structural representation of one embodiment of the service protection system of energy-constrained network.
As shown in Fig. 2 the service protection system 20 for energy-constrained network in the embodiment includes：
First node 201 and section point 202, wherein section point 202 are the upstream father nodes of first node 201；
First node 201 therein includes：
Message capturing module 2012, the message full for obtaining the routing table of section point 202；
Information sending module 2014, for sending the routing table information of first node 301 to the 3rd node, the 3rd node is
With section point network hierarchy identical and routing table less than upstream father node.
By said system, in the case where the routing table of intermediate node 202 is full, downstream node first node it can be found that with
Section point with network hierarchy and routing table less than upstream father node fourth node, and the routing table of first node is stored in
In fourth node, so as to alleviate due to section point routing table it is full caused by partial service fail the problem of.
In certain embodiments, information sending module 2014 is additionally operable in the case where not finding the 3rd node, to second
Node 202 sends the first notification message, and the first notification message includes the IP address of first node 201 and the first node of overload
201 routing table informations, so that section point 202 is carried out according to the information carried in the first notification message by the way of source routing
Service protection.
In certain embodiments, section point 202 includes：
Negotiation module 2022, for sending second notification message to fourth node 204, second notification message includes：Second
The full identification information of the routing table of node 202, the routing table information of first node 201 of overload, the IP address of first node 201, the
The IP address of two nodes 202, so as to fourth node 204 according to the information carried in second notification message by the way of source routing
Carry out service protection.
In some preferred embodiments, the system also includes fourth node, and fourth node 204 includes：
Negotiation module 2042, for consulting with section point using storage route and source routing blend modes of operation；
Information storage module 2044, for storing the information of second notification message carrying；
Source routing module 2046, find that destination node belongs to the routing table information of the first node of overload for fourth node
In node when, downlink message is sent to section point according to the information that second notification message carries, in the header of downlink message
Carry the IP address of section point and the IP address of first node.
In certain embodiments, section point 202 also includes：
Source routing module 2024, the IP address of section point 202 in the header for deleting downlink message, and according to first
The IP address of node 201 is to the converting downlink message of first node 201.
In certain embodiments, energy-constrained network is the low-power wireless personal area network based on IPv6 agreements
6Lowpan。
In said system embodiment, in the case where intermediate node routing table overloads, intermediate node can save with upstream father
Point is held consultation, and is operated with the hybrid mode of storage route and source routing, the routing table of overload is stored to middle node
The upstream father node of point, ensures the transmission of downlink message, alleviates because intermediate node routing table completely causes partial service to fail
The problem of.
One of ordinary skill in the art will appreciate that hardware can be passed through by realizing all or part of step of above-described embodiment
To complete, by program the hardware of correlation can also be instructed to complete, described program can be stored in a kind of computer-readable
In storage medium, storage medium mentioned above can be read-only storage, disk or CD etc..
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc., it should be included in the scope of the protection.
Claims (16)
- A kind of 1. service protecting method for energy-constrained network, it is characterised in that including：First node obtains the full message of section point routing table, and the section point is the upstream father node of first node；First node sends the routing table information of first node to the 3rd node, and the 3rd node is with section point network etc. Level identical and routing table less than upstream father node.
- 2. the method for claim 1, wherein methods described also includes：First node in the case where not finding the 3rd node, to section point send the first notification message, described first Notification message includes the IP address of first node and the first node routing table information of overload, so that section point is according to first The information carried in notification message carries out service protection by the way of source routing.
- 3. method as claimed in claim 2, wherein, the section point carries out service protection bag by the way of source routing Include：Section point sends second notification message to fourth node, and the second notification message includes：Section point routing table expires Identification information, first node routing table information, the IP address of first node, the IP address of section point of overload, so as to the Four nodes carry out service protection according to the information carried in second notification message by the way of source routing；The fourth node is The upstream father node of section point.
- 4. method as claimed in claim 3, wherein, fourth node uses source road according to the information carried in second notification message By mode carry out service protection and include：The information that fourth node storage second notification message carries；When fourth node finds the node in the routing table information for the first node that destination node belongs to overload, according to the second notice The information that message carries sends downlink message to section point, and the IP address of section point is carried in the header of the downlink message And the IP address of first node.
- 5. method as claimed in claim 4, wherein, section point is with deleting in the header of downlink message the IP of section point Location, and according to the IP address of first node to first node converting downlink message.
- 6. the method as described in claim 1, it is characterised in that the energy-constrained network is the low-power based on IPv6 agreements Wireless personal domain network 6Lowpan.
- A kind of 7. service protecting method for energy-constrained network, it is characterised in that including：Section point receives the first notification message from first node, and the section point is the upstream father node of first node, institute Stating the first notification message includes the IP address of first node and the first node routing table information of overload.；Section point carries out service protection according to the information carried in the first notification message by the way of source routing.
- 8. method as claimed in claim 7, wherein, the section point carries out service protection bag by the way of source routing Include：Section point sends second notification message to fourth node, so that fourth node is according to the letter carried in second notification message Breath carries out service protection by the way of source routing；Wherein, the second notification message includes the full mark of section point routing table Know information, the first node routing table information of overload, the IP address of first node, the IP address of section point；Described Section four Point is the upstream father node of section point.
- 9. method as claimed in claim 8, wherein, fourth node uses source road according to the information carried in second notification message By mode carry out service protection and include：The information that fourth node storage second notification message carries；When fourth node finds the node in the routing table information for the first node that destination node belongs to overload, according to the second notice The information that message carries sends downlink message to section point, and the IP address of section point is carried in the header of the downlink message And the IP address of first node.
- 10. method as claimed in claim 9, wherein, section point is with deleting in the header of downlink message the IP of section point Location, and according to the IP address of first node to first node converting downlink message.
- 11. a kind of service protection system for energy-constrained network, it is characterised in that including first node, section point, institute The upstream father node that section point is first node is stated, first node therein includes：Message capturing module, the message full for obtaining section point routing table；Information sending module, for sending the routing table information of first node to the 3rd node, the 3rd node is and second Meshed network grade is identical and routing table less than upstream father node.
- 12. system as claimed in claim 11, wherein, described information sending module is additionally operable to：In the case where first node does not find the 3rd node, to section point send the first notification message, described first Notification message includes the IP address of first node and the first node routing table information of overload, so that section point is according to first The information carried in notification message carries out service protection by the way of source routing.
- 13. system as claimed in claim 12, wherein, the section point includes：Negotiation module, for sending second notification message to fourth node, the second notification message includes：Section point is route The full identification information of table, the first node routing table information of overload, the IP address of first node, the IP address of section point, with Just fourth node carries out service protection according to the information carried in second notification message by the way of source routing；Described Section four Point is the upstream father node of section point.
- 14. system as claimed in claim 13, wherein, the system also includes fourth node, and the fourth node includes：Information storage module, for storing the information of second notification message carrying；Source routing module, the node in the routing table information of the destination node first node that belongs to overload is found for fourth node When, downlink message is sent to section point according to the information that second notification message carries, carried in the header of the downlink message The IP address of section point and the IP address of first node.
- 15. system as claimed in claim 14, wherein, section point also includes：Source routing module, the IP address of section point in the header for deleting downlink message, and according to the IP of first node Location is to first node converting downlink message.
- 16. the system as claimed in claim 1, it is characterised in that the energy-constrained network is the low work(based on IPv6 agreements Rate wireless personal domain network 6Lowpan.
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| KR20090049905A (en) * | 2007-11-14 | 2009-05-19 | 대구대학교 산학협력단 | Memory managing method of node for wireless sensor network |
| CN102045254A (en) * | 2010-11-30 | 2011-05-04 | 福建星网锐捷网络有限公司 | Extended processing method, device and network equipment of routing table |
| CN103560968A (en) * | 2013-10-30 | 2014-02-05 | 神州数码网络(北京)有限公司 | Switch hardware host routing table updating method and device and switch |
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