CN104468351B - Management method, CCN retransmission units and network controller based on SDN auxiliary CCN routes - Google Patents
Management method, CCN retransmission units and network controller based on SDN auxiliary CCN routes Download PDFInfo
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Abstract
The present invention, which provides a kind of management method based on SDN auxiliary CCN routes, CCN retransmission units, network controller and system, this method, to be included：Software defined network SDN Switching Modules in content center network CCN retransmission units receive the CCN packets that edge forwarding device is sent；CCN packets are sent to network controller, so that network controller is according to the topological optimal transmission paths for determining CCN packets in CCN networks of CCN and the configuration message issued according to optimal transmission paths generation；SDN Switching Modules receive the configuration message that network controller is sent, and configuration message includes being used for the information for configuring flow table；Judge whether CCN packets and flow table have the information of matching；SDN Switching Modules handle CCN packets according to matching result.The present invention by influenceing SDN Switching Modules influences the processing behavior to CCN packets, so as to influence the routing of CCN routes so that CCN networks avoid unnecessary flooding, reduce network and cross redundancy.
Description
Technical field
The present invention relates to internet arena, particularly relates to a kind of management method based on SDN auxiliary CCN routes, CCN forwardings
Device, network controller and system.
Background technology
In internet, ICN (Information-centric Networking, information centre's network) is used with information
Centered on network communication models, substitute traditional network communication models centered on address, communication pattern is from main frame to master
Machine is evolved to host-to-network, and forwarding mechanism is evolved to Buffer forwarding by traditional storage forwarding, and architecture supports main frame to move
It is dynamic, solve the problems, such as magnanimity information high efficiency of transmission.
CCN (Content-centric Networking content center networks) is existing maximally related ICN solution party
Case.CCN basic communication pattern is centered on naming content (Named Data), and user asks name content, content issue
Person's (server) issues and transmission name content, CCN router caches and transmission name content.CCN proposes a kind of brand-new
Network architecture, strategic layer and safety are added as bottom-layer network as Route Distinguisher, IP using information name at eel-like figure
Layer.Next layer of the strategic layer as Internet, decision-making is provided for route.Last layer of the safe floor as Internet, is carried for network
For security.
However, when CCN route selections and transmission data, redundant data transmissions caused by a large amount of floodings, Internet resources be present
Utilization rate is not high.
The content of the invention
The present invention proposes a kind of management method based on SDN auxiliary CCN routes, CCN retransmission units, network controller and is
System, unnecessary redundant flow and network resource usage caused by flooding when solving CCN routings present in prior art
The problem of rate is low.
In a first aspect, the present invention provides a kind of management method based on SDN auxiliary CCN routes, including：
SDN Switching Modules in CCN retransmission units receive the CCN packets that edge forwarding device is sent；
SDN Switching Modules send CCN packets to network controller, so that network controller determines CCN according to CCN topologys
Optimal transmission paths of the packet in CCN networks simultaneously generate configuration message according to optimal transmission paths；
SDN Switching Modules receive the configuration message that network controller is sent, and configuration message includes being used for the letter for configuring flow table
Breath；
SDN Switching Modules judge whether CCN packets and flow table have the information of matching；
SDN Switching Modules handle CCN packets according to matching result.
Second aspect, the present invention provide a kind of management method based on SDN auxiliary CCN routes, including：
Network controller receives the CCN packets that the SDN Switching Modules in CCN retransmission units are sent, before CCN packets are
End retransmission unit is sent to SDN Switching Modules by interface；
Parse the CCN packets received；
Optimal transmission paths of the data flow in CCN networks in the CCN packets after parsing are determined according to CCN topologys；
Configuration message is generated according to optimal transmission paths, configuration message includes being used for the information for configuring flow table；
SDN Switching Modules in send configuration message to CCN retransmission units, so that SDN Switching Modules are according to configuration message
The CCN packets received are handled.
The third aspect, the present invention provide a kind of CCN retransmission units, including：
CCN packet receiving units, for receiving the CCN packets of edge forwarding device transmission；
CCN packet transmitting elements, for sending CCN packets to network controller, so that network controller is according to CCN
The topological optimal transmission paths for determining CCN packets in CCN networks simultaneously generate configuration message according to optimal transmission paths；
Message reception units are configured, for receiving the configuration message of network controller transmission, configuration message includes being used to match somebody with somebody
Put the information of flow table；
Information judging unit, for judging whether CCN packets and flow table have the information of matching；
CCN processing data packets units, for handling CCN packets according to matching result.
Fourth aspect, the present invention provide a kind of network controller, including：
CCN packet receiving units, sent for receiving the software defined network SDN Switching Modules in CCN retransmission units
CCN packets；
CCN resolve packet units, for parsing the CCN packets received；
Optimal transmission paths determining unit, for being determined the data flow in the packet after parsing in CCN according to CCN topologys
Optimal transmission paths in network；
Message generation unit is configured, for generating configuration message according to optimal transmission paths, configuration message includes being used to match somebody with somebody
Put the information of flow table；
Message sending unit is configured, for the SDN Switching Modules in send configuration message to CCN retransmission units, so that SDN
Switching Module is handled the CCN packets received according to configuration message.
As shown from the above technical solution, the management method provided by the invention based on SDN auxiliary CCN routes, CCN forwarding dresses
Put, network controller and system, network controller directly affect the SDN Switching Modules being connected with CCN Switching Modules, influence to include
Processing behavior to CCN packets, to influence the routing of CCN routes, network controller does not configure CCN Switching Modules directly, from
And aid in CCN to route, number of the CCN routing management modules according to the CCN resolve packets of upload and representated by analyzing the packet
According to optimal path of the stream in current CCN networks, auxiliary CCN routes so that CCN networks avoid unnecessary flooding, reduce net
Network crosses redundancy, using SDN Switching Modules optimize CCN route and reduce network bandwidth take, save Internet resources, improve
CCN network performances.
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, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is a kind of flow signal for management method for aiding in CCN to route based on SDN that the embodiment of the present invention one provides
Figure；
Fig. 2 is a kind of flow signal for management method for aiding in CCN to route based on SDN that another embodiment of the present invention provides
Figure；
Fig. 3 is a kind of schematic diagram for management method for aiding in CCN to route based on SDN that another embodiment of the present invention provides；
Fig. 4 is a kind of flow signal for management method for aiding in CCN to route based on SDN that yet another embodiment of the invention provides
Figure；
Fig. 5 is a kind of structural representation for CCN retransmission units that the embodiment of the present invention one provides；
Fig. 6 is a kind of structural representation for CCN retransmission units that another embodiment of the present invention provides；
Fig. 7 is a kind of structural representation of network controller provided in an embodiment of the present invention；
Fig. 8 is a kind of structural representation of management system provided in an embodiment of the present invention；
Fig. 9 a to Fig. 9 c are the data transmission state figure of management system provided in an embodiment of the present invention.
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 purged, be complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments, is based on
Embodiment in the present invention, those of ordinary skill in the art obtained on the premise of creative work is not paid it is all its
His embodiment, belongs to the scope of protection of the invention.
SDN (Software-Defined Networking, software defined network) is a kind of emerging network paradigm, it
The separation of control plane and Forwarding plane is realized, no longer forwarding strategy is fixed in router, but is individually controlled by center
Device processed carries out policy control, and then the forwarding of network and processing system is carried out the programmed process of open architecture so that
The flexibility of network greatly improves with scalability.By realizing between a completely programmable web developers and network
Interface (Operator-Network Interface), SDN significantly reduces the management and control difficulty of network and business, and it can be with
The demand of extensive and deep web developers is realized on the premise of any network bottom layer environment is not changed, makes network real
Accomplish configurable with defining with software.
OpenFlow is a more ripe SDN solution, is mainly made up of three parts：Openflow interchangers,
Openflow controllers and Openflow agreements.Openflow interchangers are mainly made up of datum plane and control plane, data
Plane operates according to the information of flow table to the data flow of process, and control plane is responsible for securely communicating with controller to obtain
Obtain flow table processing information.One central controller then according to the requirement on upper strata control the whole network interchanger carry out data forwarding with
Processing.Openflow agreements are then that controller interacts followed agreement with interchanger.
Management system of the present invention based on SDN auxiliary CCN routes, including the network controller of auxiliary CCN routes and CCN turn
Transmitting apparatus, CCN retransmission units receive the CCN data flows that the edge forwarding device positioned at upstream is sent, and edge forwarding device includes
Front end SDN Switching Modules and front end CCN Switching Modules.Aiding in the network controller of CCN routes is included positioned at the CCN roads of Internet
Generation module is configured by management module and positioned at functional layer CCN, CCN retransmission units include SDN Switching Modules and CCN interchange modes
Block.
Carried out below by way of the function of being realized to CCN retransmission units and network controller and corresponding method flow detailed
Describe in detail bright.
Fig. 1 is a kind of schematic flow sheet of management method for aiding in CCN to route based on SDN provided in an embodiment of the present invention,
As shown in figure 1, methods described comprises the following steps：
101st, the SDN Switching Modules in CCN retransmission units receive the CCN packets that edge forwarding device is sent.
It should be noted that CCN packets can carry out block level transmission, including CCN interest bag (Interest) and CCN contents
Wrap (Data), the CCN packets in the present embodiment are CCN interest bags.
102nd, SDN Switching Modules send CCN packets to network controller, so that network controller is true according to CCN topologys
Determine optimal transmission paths of the CCN packets in CCN networks and generate configuration message according to optimal transmission paths.
Packet in the present embodiment is unknown data bag, and network controller can parse CCN resolve packets and analyze
Optimal path of the data flow in current CCN networks representated by the CCN packets, auxiliary CCN routes.
103rd, SDN Switching Modules receive the configuration message that network controller is sent, and configuration message includes being used to configure flow table
Information.
In addition, it is necessary to illustrate, the configuration message in the present embodiment may also include other information, and the present embodiment is only to lift
Example explanation does not limit the information content included by the configuration message.
104th, SDN Switching Modules judge whether CCN packets and flow table have the information of matching.
105th, SDN Switching Modules handle CCN packets according to matching result.
For example, SDN Switching Modules can forward according to matching result, abandon CCN packets or control CCN data
Bao Chong walks streamline.
In a particular application, the SDN edge interfaces of conventional internet and the front end SDN Switching Modules in edge forwarding device
It is connected, the packet that conventional internet is sent, front end SDN Switching Modules, front end SDN interchange modes is entered by SDN edge interfaces
Whether the packet that block judges to receive is CCN packets, if CCN packets, is then sent by interface to front end CCN interchange modes
Block.
It is CCN interest bags that front end CCN Switching Modules, which receive CCN packets, respectively in CS (Content Store, content
Thesaurus), PIT (Pending Interest Table, interest table undetermined), FIB (Forward Information Base,
Forwarding information storehouse) matching record is searched, if the CCN interest bag and no record, i.e., CS, PIT, FIB tri-, which is opened in table, does not all record,
Then the CCN interest bags are flooded away.
The present embodiment influences the processing behavior to CCN packets by directly affecting SDN Switching Modules, and then to influence
The routing of CCN routes, network controller do not configure CCN Switching Modules directly, when can avoid significantly because of routing caused by flooding
Redundant flow, close to optimal handling capacity.
Fig. 2 and Fig. 3 is the schematic flow sheet of one embodiment of step 105 of the embodiment of the present invention, wherein, such as Fig. 2 and Fig. 3
Method shown, that SDN Switching Modules handle CCN packets according to matching result, including：
1051st, the SDN Switching Modules in CCN retransmission units judge when CCN packets and flow table have the information of matching
Whether CCN packets require to forward from designated port.
For example, designated port refers to be defined being used for of being connected with SDN Switching Modules and forwards connecing for the CCN packets
Mouthful.
1052nd, SDN Switching Modules send CCN packets to CCN turns when the requirement of CCN packets forwards from designated port
CCN Switching Modules in transmitting apparatus, so that forwarding interface and forwarding of the CCN Switching Modules according to PIT table search CCN packets
CCN packets.
Wherein, the CCN packets are CCN content bags.
For example, CCN Switching Modules receive CCN content bags, and the interface in CCN interest bags source is searched in PIT tables,
The interface in CCN interest bags source is the interface that CCN contents bag will forward output, and " content " is forwarded from these interfaces, and
By the addition renewal of content bag into CS, renewal notice message is produced.
1053rd, SDN Switching Modules receive the updating record message that CCN Switching Modules are sent.
Wherein, updating record message is that CCN packets are added to CS by CCN Switching Modules after CCN packets are received
Generate afterwards.
1054th, SDN Switching Modules encapsulate updating record message according to communication protocol.
For example, communication protocol can use openflow agreements.
1055th, SDN Switching Modules send updating record message to network controller, so that network controller updates optimal biography
Defeated path.
In the present embodiment, the updating record message received is uploaded to network controller by SDN Switching Modules, so that network
Controller updates optimal transmission paths, and network controller receives renewal notice message, router-level topology is updated, according to result of calculation
Generation configuration information is sent to SDN Switching Modules, the renewal flow table configuration of SDN Switching Modules
It should be noted that after step 1052, methods described also includes：
SDN Switching Modules send feedback message to edge forwarding device, so that edge forwarding device has known CCN packets
Forwarding finishes.
Wherein, SDN Switching Modules send the CCN Switching Modules inside feedback message to edge forwarding device.
It should be noted that the information that the SDN Switching Modules in CCN retransmission units do not match in CCN packets with flow table
When, SDN Switching Modules forward according to matching result, abandon CCN packets or the control CCN packets to walk streamline again equal
Can.
In a particular application, SDN Switching Modules abandon CCN data when CCN packets do not require to forward from designated port
Bag.It is required that from designated port forward when, be decided to be SDN Switching Modules that CCN packet forwarding interfaces are connected to the CCN data
Bag is forwarded, and feeds back to the edge forwarding device of data source in time, is not decided to be the interface phase of CCN packets forwarding
Direct-connected SDN Switching Modules then directly abandon this packet, also do not feed back.
It should be noted that the SDN Switching Modules in the present embodiment serve as retransmission unit and the medium of controller communication, can
Updating record message is uploaded and informs controller, CCN Switching Modules can be by module outside the general CCN router features of enforcement
Interior CS renewals are advertised to SDN Switching Modules.
The direct-connected SDN Switching Modules of the data-interface each with CCN Switching Modules in the present embodiment, come from receiving
After the packet that front end CCN Switching Modules are sent, the configuration message issued according to controller is handled CCN packets, such as
Forwarding abandons, unnecessary redundant flow caused by flooding when overcoming CCN routings present in prior art.
The present embodiment feeds back to network controller via SDN Switching Modules, and it is unnecessary that SDN Switching Modules can block
CCN floods data flow, and the notice received is packaged and is uploaded to network controller by SDN Switching Modules；Network controller connects
Content update notice message is received, updates router-level topology, generating configuration information according to result of calculation issues SDN Switching Modules, SDN
Switching Module renewal flow table configuration.
It should be noted that it is a good implementation to provide CCN functions by using OpenFlow programmability,
Advantages of the OpenFlow in CCN traffic managements has：CCN interest bag routings greatly simplify, and distributed routing is changed into centralization
Nox determines routing, redundant flow caused by flooding when can avoid significantly because of routing, close to optimal handling capacity.
Fig. 4 is a kind of schematic flow sheet of management method for aiding in CCN to route based on SDN provided in an embodiment of the present invention,
As shown in figure 4, methods described comprises the following steps：
301st, network controller receives the CCN packets that the SDN Switching Modules in CCN retransmission units are sent.
Wherein, CCN packets are sent to SDN Switching Modules, CCN packets for edge forwarding device by interface is
CCN interest bags.
302nd, the CCN packets received are parsed.
303rd, optimal transmission road of the data flow in CCN networks in the CCN packets after parsing is determined according to CCN topologys
Footpath.
For example, network controller is according to optimal transmission paths between the CCN topology calculate nodes of internal network, but not only
It is limited to this, can sets itself calculation as the case may be.
304th, configuration message is generated according to optimal transmission paths, configuration message includes being used for the information for configuring flow table.
It should be noted that network controller is sent to SDN Switching Modules to change the configuration message of its working condition, this
In configure message calls it is possible to notify that SDN Switching Modules those matching CCN name prefixes CCN packets.
305th, the SDN Switching Modules in send configuration message to CCN retransmission units, so that SDN Switching Modules are according to configuration
Message is handled the CCN packets received.
In a particular application, network controller is according to the CCN resolve packets of reception and representated by analyzing the packet
Optimal path of the data flow in current CCN networks, auxiliary CCN routes, network controller include routing resolution function, route meter
Function is calculated, can be according to optimal transmission paths between the CCN topology calculate nodes of internal network.
Network control in the present embodiment can be according to analysis result send configuration message, and is transported to control pipeline, profit
CCN routing mechanisms are aided in SDN centralization controller so that CCN networks avoid unnecessary flooding, reduce network and cross redundancy.
The configuration message and updating record message that the network controller of auxiliary CCN routes is issued are encapsulated in a certain communication protocol
In, such as openflow agreements, openflow agreements support above-mentioned message format by extension.
Fig. 5 is a kind of structural representation for CCN retransmission units that the embodiment of the present invention one provides, as shown in figure 5, the dress
Put including：CCN packets receiving unit 51, CCN packets transmitting element 52, configuration message reception units 53, information judge single
54 and CCN of member data processing units 55.
Wherein, CCN packets receiving unit 51 is used for the CCN packets for receiving the transmission of edge forwarding device；
CCN packets transmitting element 52 is used to send CCN packets to network controller so that network controller according to
The topological optimal transmission paths for determining CCN packets in CCN networks of CCN simultaneously generate configuration message according to optimal transmission paths；
Configuration message reception units 53 are used for the configuration message for receiving network controller transmission, and configuration message includes being used to match somebody with somebody
Put the information of flow table；
Information judging unit 54 is used to judge whether CCN packets and flow table have the information of matching；
CCN processing data packets unit 55 is used to handle CCN packets according to matching result.
In a kind of possible implementation, foregoing CCN packets receiving unit 51 receives the hair in CCN retransmission units
The CCN packets sent, CCN packets transmitting element 52 send CCN packets to network controller so that network controller according to
The topological optimal transmission paths for determining CCN packets in CCN networks of CCN simultaneously generate configuration message according to optimal transmission paths,
Configuration message reception units 53 receive the configuration message that the network controller is sent, and configuration message includes being used to configure flow table
Information, information judging unit 54 judge whether the CCN packets and flow table have the information of matching, CCN processing data packets units
55 handle CCN packets according to matching result.
Wherein, CCN processing data packets unit 55 can abandon according to matching result, forward CCN packets or control CCN numbers
Streamline is walked according to Bao Chong.
The CCN retransmission units of the present embodiment can perform the flow in the embodiment of the method shown in foregoing Fig. 1, the present embodiment
It is not described in detail herein.
The present embodiment influences the processing behavior to CCN packets by SDN Switching Modules, and then to influence CCN routes
Routing, can avoid significantly because redundant flow caused by flooding during routing, close to optimal handling capacity.
Fig. 6 is a kind of structural representation for CCN retransmission units that another embodiment of the present invention provides, as shown in fig. 6, described
Device includes：CCN packets receiving unit 61, CCN packets transmitting element 62, configuration message reception units 63, information judge
Unit 64, designated port judging unit 65, CCN packets transmitting element 66, updating record message reception units 67, updating record
Message encapsulation unit 68 and updating record message sending unit 69.
Wherein, CCN packets receiving unit 61, CCN packets transmitting element 62, configuration message reception units 63 and information
Judging unit 64 corresponds to CCN packets receiving unit 51 in earlier figures 5, CCN packets transmitting element 52, configuration message respectively
Receiving unit 53 and information judging unit 54, no longer illustrate at this.
Designated port judging unit 65 is used to, when CCN packets and flow table have the information of matching, judge that CCN packets are
It is no to require to forward from designated port；
CCN data packet forwarding unit 66 is used to, when the requirement of CCN packets forwards from designated port, send CCN packets
CCN Switching Modules into CCN retransmission units, so that forwarding interface of the CCN Switching Modules according to PIT table search CCN packets
And forward CCN packets；
Updating record message reception units 67 are used for the updating record message for receiving the transmission of CCN Switching Modules, updating record
Message is that CCN packets are being added to what is generated after CS by CCN Switching Modules after receiving CCN packets；
Updating record message encapsulation unit 68 is used for according to openflow protocol encapsulation updating record message；
Updating record message sending unit 69 is used to send updating record message to network controller, so that network controller
Update optimal transmission paths.
In a kind of possible implementation, foregoing designated port judging unit 65 is additionally operable in CCN packets and stream
When table has the information of matching, judge whether CCN packets require to forward from designated port；
Correspondingly, when the requirement of CCN packets forwards from designated port, CCN packets transmitting element 66 sends CCN data
Bag is to the CCN Switching Modules in CCN retransmission units, so that CCN Switching Modules connect according to the forwarding of PIT table search CCN packets
Mouth simultaneously forwards CCN packets；
Correspondingly, updating record message reception units 67 receive the updating record message that CCN Switching Modules are sent, renewal report
It is that CCN packets are being added to what is generated after CS by CCN Switching Modules after receiving CCN packets to accuse message；
Correspondingly, updating record message encapsulation unit 68 is according to openflow protocol encapsulation updating record message, renewal report
Accuse message sending unit 69 and send updating record message to network controller, so that network controller updates optimal transmission paths.
Preferably, in addition to feedback message transmitting element, for sending feedback message to edge forwarding device, so that edge
Retransmission unit is known that CCN packets have forwarded and finished.
The CCN retransmission units of the present embodiment can perform the flow in the embodiment of the method shown in foregoing Fig. 2 to Fig. 4, this
Embodiment is not described in detail herein.
CCN retransmission units in the present embodiment forward to CCN packets, and feed back to the edge of data source in time
Retransmission unit, after the packet sent from front end CCN Switching Modules is received, the configuration issued according to network controller disappears
Breath is forwarded or abandoned to CCN packets, unnecessary superfluous caused by flooding when overcoming CCN routings present in prior art
Residual current amount.
Fig. 7 is a kind of structural representation of network controller provided in an embodiment of the present invention, as shown in fig. 7, the network
Controller includes：CCN packets receiving unit 71, CCN resolve packets unit 72, optimal transmission paths determining unit 73, match somebody with somebody
Put message generation unit 74 and configuration message sending unit 75.
Wherein, CCN packets receiving unit 71 is used to receive the CCN numbers that the SDN Switching Modules in CCN retransmission units are sent
According to bag；
CCN resolve packets unit 72 is used to parse the CCN packets received；
Optimal transmission paths determining unit 73 is used to determine that the data flow in the packet after parsing exists according to CCN topologys
Optimal transmission paths in CCN networks；
Configure message generation unit 74 to be used to generate configuration message according to optimal transmission paths, configuration message includes being used to match somebody with somebody
Put the information of flow table；
The SDN Switching Modules that message sending unit 75 is used in send configuration message to CCN retransmission units are configured, so that
SDN Switching Modules are handled the CCN packets received according to configuration message.
In a kind of possible implementation, foregoing CCN packets receiving unit 71, which is additionally operable to receive, receives CCN forwarding dresses
The CCN packets that SDN Switching Modules in putting are sent；
Correspondingly, CCN resolve packets unit 72 parses the CCN packets received；
Correspondingly, optimal transmission paths determining unit 73 determines the data flow in the packet after parsing according to CCN topologys
Optimal transmission paths in CCN networks；
Correspondingly, configure message generation unit 74 and generate configuration message according to optimal transmission paths, configuration message includes using
In the information of configuration flow table；
Correspondingly, the SDN Switching Modules in the send configuration message of message sending unit 75 to CCN retransmission units are configured, with
SDN Switching Modules are made to be handled according to configuration message the CCN packets received.
The network controller of the present embodiment can perform the flow in the embodiment of the method shown in foregoing Fig. 5, the present embodiment
It is not described in detail herein.
Network controller parses the CCN packets received and analyzes the data flow representated by the packet in the present embodiment
Optimal path in current CCN networks, auxiliary CCN routes, CCN routing management modules include routing resolution function, route meter
Function is calculated, can be according to optimal transmission paths between the CCN topology calculate nodes of internal network, and according to optimal transmission road between node
Footpath generates the configuration message issued, and is transported to control pipeline, aids in CCN routing mechanisms using SDN centralization controller, makes
Obtain CCN networks and avoid unnecessary flooding, reduce network and cross redundancy.
Fig. 8 is a kind of structural representation of management system provided in an embodiment of the present invention, and Fig. 9 a-9c are the pipe shown in Fig. 8
The transmission state schematic diagram of CCN packets in reason system, as shown in Fig. 8 and Fig. 9 a-9c, the management system includes：It is above-mentioned
CCN retransmission units 81 and above-mentioned network controller 82, CCN retransmission units 81 and network controller 82 interact.
A kind of management system that the present embodiment provides, including the network controller being route positioned at the auxiliary CCN of control plane
82 and the CCN retransmission units 81 of datum plane, the network controller of auxiliary CCN routes includes the CCN route pipes positioned at Internet
Manage module and the CCN positioned at functional layer configures generation module, CCN routing management modules are used for the CCN packet solutions according to upload
Analyse and analyze optimal path of the data flow representated by the packet in current CCN networks, auxiliary CCN routes, CCN route pipes
Manage module and include routing resolution function, router-level topology function, can be according to optimal biography between the CCN topology calculate nodes of internal network
Defeated path, CCN configuration generation modules are used to generate the configuration message issued according to analysis result, and are transported to control pipeline,
CCN routing mechanisms are aided in using SDN centralization controller so that CCN networks avoid unnecessary flooding, and it is excessively superfluous to reduce network
It is remaining.The auxiliary control message and CCN Switching Module report message that the network controller of auxiliary CCN routes is issued are encapsulated in
In a certain communication protocol, such as openflow agreements, openflow agreements support above-mentioned message format by extension.
In the present embodiment, the major function of CCN retransmission units 81 is transmission CCN packets, can be direct by unknown data bag
It is uploaded to the network controller 82 of auxiliary CCN routes and the message for describing unit state can be uploaded informing network controller
82, including SDN Switching Modules and CCN Switching Modules, SDN Switching Modules, such as openflow interchangers, serve as CCN retransmission units
81 and controller communication medium；CCN Switching Modules can update CS in module outside the general CCN router features of enforcement
It is advertised to SDN Switching Modules；SDN Switching Modules can identify outside the general SDN switch function of enforcement and parse CCN data
Bag, can receive the report message from CCN Switching Modules and encapsulate upload report message.
The network controller of CCN routes is aided in be analyzed receiving packet；Message for needing response, from receipts
Onto the edge interface of packet, send and reply response message；For the control message of feedback, bottom data plane is handed down to
SDN Switching Modules, aid in the computing module on the network controller of CCN routes with CCN route selections, the calculating of computing module
Need to formulate routing forwarding rule according to CCN naming rule, the topology status of the whole network and network service traffic state.
It should be noted that the network controller of auxiliary CCN routes directly affects the SDN being connected with CCN Switching Modules and exchanged
Module, influence comprising the processing behavior to packet, to influence the routing of CCN routes, the network controller of auxiliary CCN routes is not
Directly configure CCN Switching Modules.
The direct-connected SDN Switching Modules of each data-interface with CCN Switching Modules, exchanged receiving from front end CCN
After the packet that module is sent, the configuration message issued according to controller is forwarded or abandoned to CCN packet.
The present invention proposes one and especially reduces network flooding using SDN characteristics improvement CCN networks and be transmitted across redundancy
The scheme of information, i.e., CCN data flow optimal paths are analyzed by the network controller for aiding in CCN to route, issue control logic,
Transfer to bottom SDN Switching Modules auxiliary CCN routes, compared with prior art, achieve and route and reduce using SDN optimizations CCN
Network bandwidth occupancy, contributes to CCN networks to avoid unnecessary flooding, saves Internet resources, improve CCN network performances
Beneficial effect.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (8)
- A kind of 1. management method based on SDN auxiliary CCN routes, it is characterised in that including：Software defined network SDN Switching Modules in content center network CCN retransmission units receive what edge forwarding device was sent CCN packets；The SDN Switching Modules send the CCN packets to network controller, so that the network controller is opened up according to CCN Flutter and determine optimal transmission paths in CCN networks of the CCN packets and generate configuration according to the optimal transmission paths to disappear Breath；The SDN Switching Modules receive the configuration message that the network controller is sent, and the configuration message includes being used to configure The information of flow table；The SDN Switching Modules judge whether the CCN packets and flow table have the information of matching, obtain matching result；The SDN Switching Modules handle the CCN packets according to the matching result；SDN Switching Modules CCN packets according to the result treatment, including：SDN Switching Modules in the content center network CCN retransmission units have the letter of matching in the CCN packets and flow table During breath, judge whether the CCN packets require to forward from designated port；The SDN Switching Modules send the CCN packets to interior when CCN packets requirement forwards from designated port Hold the CCN Switching Modules in central site network CCN retransmission units；The SDN Switching Modules receive the updating record message that the CCN Switching Modules are sent, and the updating record message is institute State CCN Switching Modules and the CCN packets are added to what is generated after CS after the CCN packets are received；The SDN Switching Modules encapsulate the updating record message according to communication protocol；The SDN Switching Modules send the updating record message to network controller, so that network controller renewal is most Excellent transmission path.
- 2. the method as described in claim 1, it is characterised in that when CCN packets requirement forwards from designated port, hair The CCN Switching Modules in the CCN packets to content center network CCN retransmission units are sent, so that the CCN interchange modes root tuber According to the forwarding interface of CCN packets described in PIT table search and after forwarding the CCN packets, methods described also includes：The SDN Switching Modules send feedback message to the edge forwarding device, so that the edge forwarding device knows institute State CCN packets and forwarded and finish.
- 3. the method as described in claim 1, it is characterised in that methods described also includes：SDN Switching Modules in the content center network CCN retransmission units are not required from designated port in the CCN packets During forwarding, the CCN packets are abandoned.
- A kind of 4. management method based on SDN auxiliary CCN routes, it is characterised in that including：Network controller receives the CCN that the software defined network SDN Switching Modules in content center network CCN retransmission units are sent Packet, the CCN packets are that front end CCN Switching Modules are sent to the SDN Switching Modules by interface；Parse the CCN packets received；Optimal transmission paths of the data flow in CCN networks in the CCN packets after the parsing are determined according to CCN topologys；Configuration message is generated according to the optimal transmission paths, the configuration message includes being used for the information for configuring flow table；Send it is described configuration message to the CCN retransmission units in SDN Switching Modules so that the SDN Switching Modules according to The configuration message is handled the CCN packets received；The SDN Switching Modules are handled the CCN packets received according to the configuration message, including：The SDN Switching Modules judge whether the CCN packets and flow table have the information of matching, obtain matching result；The SDN Switching Modules handle the CCN packets according to the matching result；SDN Switching Modules CCN packets according to the result treatment, including：SDN Switching Modules in the content center network CCN retransmission units have the letter of matching in the CCN packets and flow table During breath, judge whether the CCN packets require to forward from designated port；The SDN Switching Modules send the CCN packets to interior when CCN packets requirement forwards from designated port Hold the CCN Switching Modules in central site network CCN retransmission units；The SDN Switching Modules receive the updating record message that the CCN Switching Modules are sent, and the updating record message is institute State CCN Switching Modules and the CCN packets are added to what is generated after CS after the CCN packets are received；The SDN Switching Modules encapsulate the updating record message according to communication protocol；The SDN Switching Modules send the updating record message to network controller, so that network controller renewal is most Excellent transmission path.
- A kind of 5. CCN retransmission units, it is characterised in that including：Content center network CCN packet receiving units, for receiving the CCN packets of edge forwarding device transmission；CCN packet transmitting elements, for sending the CCN packets to network controller, so that the network controller root Generated according to the topological optimal transmission paths for determining the CCN packets in CCN networks of CCN and according to the optimal transmission paths Configure message；Message reception units are configured, the configuration message sent for receiving the network controller, the configuration message includes using In the information of configuration flow table；Information judging unit, for judging whether the CCN packets and flow table have the information of matching；CCN processing data packets units, for handling the CCN packets according to matching result；The CCN retransmission units also include：Designated port judging unit, for when the CCN packets and flow table have the information of matching, judging the CCN data Whether bag requires to forward from designated port；CCN packet transmitting elements, for when CCN packets requirement forwards from designated port, sending the CCN data Wrap to the CCN Switching Modules in content center network CCN retransmission units；Updating record message reception units, the updating record message sent for receiving the CCN Switching Modules, the renewal report It is that the CCN Switching Modules generate after the CCN packets are added into CS after receiving the CCN packets to accuse message 's；Updating record message encapsulation unit, for encapsulating the updating record message according to communication protocol；Updating record message sending unit, for sending the updating record message to the network controller, so that the net Network controller updates optimal transmission paths.
- 6. CCN retransmission units as claimed in claim 5, it is characterised in that the CCN retransmission units also include：Feedback message transmitting element, for sending feedback message to edge forwarding device, so that the edge forwarding device is known The CCN packets, which have forwarded, to be finished.
- A kind of 7. network controller, it is characterised in that including：Content center network CCN packet receiving units, for receiving the software definition in content center network CCN retransmission units The CCN packets that network SDN Switching Modules are sent；CCN resolve packet units, for parsing the CCN packets received；Optimal transmission paths determining unit, for being determined the data flow in the packet after the parsing in CCN according to CCN topologys Optimal transmission paths in network；Message generation unit is configured, for generating configuration message according to the optimal transmission paths, the configuration message includes using In the information of configuration flow table；Message sending unit is configured, for sending the SDN Switching Modules in configuration message to the CCN retransmission units, with The SDN Switching Modules are made to be handled according to the configuration message the CCN packets received；The SDN Switching Modules are handled the CCN packets received according to the configuration message, including：The SDN Switching Modules judge whether the CCN packets and flow table have the information of matching, obtain matching result；The SDN Switching Modules handle the CCN packets according to the matching result；SDN Switching Modules CCN packets according to the result treatment, including：SDN Switching Modules in the content center network CCN retransmission units have the letter of matching in the CCN packets and flow table During breath, judge whether the CCN packets require to forward from designated port；The SDN Switching Modules send the CCN packets to interior when CCN packets requirement forwards from designated port Hold the CCN Switching Modules in central site network CCN retransmission units；The SDN Switching Modules receive the updating record message that the CCN Switching Modules are sent, and the updating record message is institute State CCN Switching Modules and the CCN packets are added to what is generated after CS after the CCN packets are received；The SDN Switching Modules encapsulate the updating record message according to communication protocol；The SDN Switching Modules send the updating record message to network controller, so that network controller renewal is most Excellent transmission path.
- A kind of 8. management system, it is characterised in that including：CCN retransmission units as described in claim 5 or 6, andNetwork controller as claimed in claim 7, the CCN retransmission units interact with the network controller.
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