CN108989916B - Cross-domain protection networking method for power distribution communication network facing quantum protection communication service - Google Patents
Cross-domain protection networking method for power distribution communication network facing quantum protection communication service Download PDFInfo
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Abstract
The invention discloses a quantum protection communication service-oriented cross-domain protection networking method for a power distribution communication network, which provides a cross-domain protection-oriented ubiquitous optical access network centralized control function architecture by introducing a software defined networking technology in a power distribution and utilization communication network consisting of optical access for bearing quantum key distribution, further designs a cross-domain protection function module and expands a corresponding protocol. Then, a global evaluation strategy is designed on the basis of the architecture, and a decision is made for resource allocation of a protection link by integrating the whole network ubiquitous access resources and the optical convergence layer resources. Finally, an interactive process for realizing cross-domain protection is designed. Compared with the traditional access network, the method can realize more robust network morphology and provide effective service protection service and network performance.
Description
Technical Field
The invention relates to the technical field of survivability of a power distribution communication network, in particular to a quantum protection communication service-oriented cross-domain protection networking method for the power distribution communication network.
Background
An application mode of the quantum key in the power distribution service is shown in fig. 1, where a hollow arrow path is a quantum key distribution channel, an endless curve path is a service communication channel, and hollow circular dotted lines at two ends are quantum key negotiation generation channels.
On the main station side of the city, according to the difference of the adopted transmission channel quantum encryption scheme or the terminal service quantum encryption scheme, the position of the quantum key stored on the main station side is a secure access gateway or an encryption authentication device; and at the power distribution terminal side, an external terminal encryption module or a built-in terminal encryption module can be selected according to the actual situation of the service terminal.
The deployment modes of the quantum key in the power distribution service scene mainly comprise three types.
1) And (4) a transformer substation deployment mode. The access gateway, the encryption authentication device and the distribution automation service system are deployed at a main station in the city. The quantum key management equipment is deployed in the substation and used for storing the quantum key generated by negotiation with the main station. The quantum key mobile storage equipment copies the quantum key from the substation quantum key management equipment, and then sequentially outputs the key to each distribution service terminal.
2) And (4) deploying application modes in a power distribution work area. The deployment mode of the safety encryption equipment at the convergence side is the same as that of a transformer substation, the quantum key management equipment is deployed in an open-close station or a ring main unit of a power distribution work area, and each power distribution service terminal obtains a quantum key from the quantum key management equipment through the quantum key mobile storage equipment and is used for encrypting service data.
3) And directly connecting the power distribution terminal to deploy an application mode. Different from the two application modes, the quantum key management device is not deployed in the mode, and the quantum key is directly injected into the power distribution terminal for service encryption communication and encryption communication of the key power distribution service terminal.
The power distribution communication network supporting the quantum key is a communication network established for realizing remote control of power distribution facilities in power distribution, the survivability of the communication network is related to power supply of power users, the communication network is closely related to daily production and life of people, and serious survivability problems cause serious loss of the power users. A typical power distribution communication network includes two network portions, an access portion and a convergence portion. The access layer includes a wireless access network, a Passive Optical Network (PON) and a plurality of ubiquitous access type networks of an industrial ethernet, and the convergence layer is a ring optical convergence network. In an access layer, the design of various ubiquitous access networks only considers the access problem of users, the survivability of the network is not considered or not considered, the network architecture is very simple, for example, the general structure of a passive optical network is only a simple tree network, and the users are connected by only a single optical fiber link. Under the current network scene that the network scale of the power distribution communication network is gradually enlarged and the service survivability demand is increased, the traditional ubiquitous access network architectures cannot provide necessary survivability guarantee for the service due to the limitation factor of the robustness, and the power distribution communication network architecture with high survivability becomes the inevitable trend of the development of the access network. The key to improving the survivability of the power distribution communication network is how to realize the smooth evolution from the existing power distribution communication network to the high-survivability power distribution communication network architecture on the basis of the existing power distribution communication network architecture.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a quantum protection communication service oriented power distribution communication network cross-domain protection networking method capable of improving the survivability of a power distribution communication network.
A quantum protection communication service-oriented cross-domain protection networking method for a power distribution communication network comprises the following steps: setting a power distribution communication network unified control architecture, wherein the power distribution communication network unified control architecture is divided into two planes, namely a data plane and a control plane;
the data plane comprises an optical transmission system and an access network system, the optical transmission system is an optical convergence ring network, the access network system is a ubiquitous access network which is formed by two layers OF physical deployment and superposition OF a wireless multi-hop network and a PON network, the convergence ring network comprises a wavelength selection switch supporting OpenFlow and a core router supporting OpenFlow, the wireless multi-hop network in the access network system comprises a macro base station supporting OpenFlow and connected to OF-WSS through optical fibers, and a micro base station supporting OpenFlow and realizing mutual communication through wireless, a typical PON architecture in the PON network comprises an OLT supporting OpenFlow, an optical splitter and an ONU supporting OpenFlow, the OLT, the optical splitter and the ONU are connected through the optical fibers to form a tree-shaped network structure, wherein the OF-OLT is connected to the OF-WSS through the optical fibers, meanwhile, a multifunctional ubiquitous access network device supporting OpenFlow exists in the data plane, and an OF-UAD is equivalent to a pair OF interconnected micro base station and OF-ONU, and communication interconnection among the wireless network PON networks is realized.
The control plane is composed of a plurality of controllers which are interconnected, the controllers comprise a PON controller PC, a wireless controller RC and an optical controller OC which respectively correspond to a PON, a wireless network and an optical network, the controllers are mutually connected through a wireless PON controller interface RPI, a wireless optical controller interface ROI and an optical PON controller interface OPI, network information is interacted and shared, network centralized control is achieved, and software defined control can be achieved through an OpenFlow protocol when the control plane controls data plane equipment.
The unified control architecture OF the power distribution communication network has the advantages that CDP (quantum protection oriented communication service) can be realized through multi-domain network fusion and interconnection, when the service needing survivability guarantee reaches a network node, not only can the service protection OF the network be realized on the original network, but also the OF-UAD can be used for realizing the cross-domain search OF the protection path OF the network, and further the CDP is realized. The two service paths shown in fig. 2 are a main path of the wireless network service and a protection service path using the PON network. Compared with normal single-layer network service protection, the CDP function can provide more optional resources for the service protection path, can effectively improve the survivability of the network, and provides network service with higher survivability for users
The wireless controller RC: the wireless controller is mainly responsible for controlling a wireless network layer, realizes interactive cooperation with other controllers through an interactive interface between the controllers, and completes control of a CDP mechanism, and comprises the following components: enhanced OpenFlow module, cross-domain protection interaction agent and wireless spectrum control and monitor:
the enhanced OpenFlow module: when the state information that the wireless base station interface is occupied is received, the module is used for sending the flow table modification information to upgrade the control interface of the wireless base station and realize wireless resource allocation.
The cross-domain protection interaction agent comprises the following steps: the module is mainly used for sharing network resources and state information and processing or sending a CDP request so as to support a CDP mechanism.
The wireless spectrum control and monitor: the system is mainly responsible for compiling and managing the wireless layer network state through an OpenFlow protocol, controlling the relay forwarding of the wireless transmission service, monitoring and integrating the wireless service and the wireless resource occupation state and providing the wireless service and the wireless resource occupation state to a CDP interaction agent.
The light controller OC: the optical controller is mainly responsible for controlling the optical transmission network, and is used as a core controller to execute necessary calculation and resource allocation processes for the CDP mechanism, and mainly comprises the following modules: enhanced OpenFlow module, flow control and monitor, database management, cross-domain protection interaction agent, and CDP mechanism.
The enhanced OpenFlow module: the module is used for sending flow table modification information to upgrade a control interface of the bottom layer optical network equipment so as to realize software defined control of the optical transmission network.
The flow control and monitor: the system is mainly responsible for monitoring, compiling and managing the state OF the bottom layer optical transmission network equipment through an OpenFlow protocol, and configuring each OF-WSS flow table for bottom layer data transmission according to a resource allocation result.
The database management comprises the following steps: network real-time status information and resource occupancy information are stored, and optical connection information is stored after optical connection is established.
The cross-domain protection interaction agent comprises the following steps: interacting with RC and PC, sharing the information and state of each layer of network resource, generating CDP request, and providing the relevant information to CDP mechanism module to support reasonable and effective distribution of CDP resource.
The CDP mechanism: the system comprises three sub-modules which are respectively a Path Computation Element (PCE), a protection strategy and a global evaluation strategy, wherein the PCE computes a protection Path for a CDP mechanism, the protection strategy comprises various service protection strategies, and the global evaluation strategy can determine whether to call the CDP strategy and allocate protection resources by evaluating the whole network condition.
The PON controller PC: the PON controller is mainly responsible for monitoring the resource state in the PON network, interacts with other controllers, supports the CDP mechanism together, mainly includes the following modules: enhanced OpenFlow module, cross-domain protection interactive agent and PON control and monitor:
the enhanced OpenFlow module: when receiving the state information that the OF-ONU or OF-OLT interface is occupied, the module is used for sending flow table modification information to upgrade the control interface OF the equipment, so as to realize DBA in the PON network.
The cross-domain protection interaction agent comprises the following steps: the information interaction with OC and RC is realized through the OPI interface and the RPI interface, and the device is mainly used for sharing network resources and state information and processing or sending a CDP request so as to support a CDP mechanism.
The PON control and monitor: the system is mainly responsible for compiling and managing the state OF a PON layer network through an OpenFlow protocol, controlling uplink and downlink transmission OF an OF-ONU and an OF-OLT, monitoring and integrating PON network access service and network state and providing the PON access service and the network state to a CDP interaction agent.
The OpenFlow protocol mainly comprises rules, behaviors and states, wherein the rules comprise various characteristics in the network, including an input/output interface, optical network characteristics, PON characteristics and wireless network characteristics; the optical network characteristics comprise a central wavelength and a channel space; PON features include ONU, time slot, and bandwidth; and the wireless characteristics include radio frequency and interface limitations; the behaviors include all executable network behaviors in the network, including switching, adding, removing, Relaying (REPEAT), unloading, loading, uploading, downloading and deleting, the behaviors and rules are combined according to a specific sequence to realize all operation behaviors in the network, and the states are used for monitoring the flow state of the underlying equipment to provide necessary data information for a control strategy.
The invention also provides a global evaluation strategy for the distribution condition of the service protection path resources, provides effective guidance for the reasonable distribution of the protection resources,
the global evaluation of the allocation of the service protection path resources specifically includes: in the OC server, the total network resource condition collected by the OC and the main path information distributed to the service by the RC can find k alternative links which have the shortest path and do not have a repeated link with the main path by using a ksp routing algorithm in the global scope, and then find k alternative wireless links which have the shortest path and do not have a repeated link with the main path by using the ksp routing algorithm again in a single layer of a wireless network layer, so that 2k alternative paths are obtained;
and respectively finding path sections of different domain networks in each path, and further calculating a path resource function value. The network transfer functions of the wireless layer, the PON layer and the optical convergence layer are respectively shown in formulas (1), (2) and (3),
wherein, WnRepresenting the traffic weight, H, of a node on a path in a wireless networkrpRepresenting the number of hops of a path in the wireless network. Since all ONUs in a PON network share bandwidth resources, the weight of a flow through the PON is only related to the total load in the PON, so WmIndicating passage through PONTraffic buffer weight of mth node, NOIndicating the number of ONUs in the PON that pass through, and 0 without passing through. WlRepresenting the traffic weight, H, of an optical fibre link on a path in an optical transmission networkopRepresenting the number of hops on a path in an optical transport network,
the resource function from which the path can be derived is shown in equation 4:
wherein, alpha, beta, gamma, deltarp、δpo、δroRepresenting the relative proportional weights of the wireless, PON, optical transmission link and the wireless-PON, PON-optical, wireless-optical conversions, respectively. Epsilon (rp), epsilon (po) and epsilon (ro) respectively represent wireless-PON, PON-optical and wireless-optical conversion step functions, if the conversion is carried out, the value is 1, and if the conversion is not carried out, the value is 0;
the global resource optimization factor η can be further obtained by the above formula, and can be calculated by formula (5):
the path with the minimum eta value is the global optimal path, if the optimal path belongs to the global shortest k paths, the CDP is determined, and if the optimal path belongs to the wireless layer network shortest k paths, the CDP is not needed.
In summary, compared with the prior art, the invention has the following advantages:
the invention discloses a quantum protection communication service-oriented cross-domain protection networking method for a power distribution communication network. In a power distribution and utilization communication network formed by optical access bearing quantum key distribution, a software defined networking technology is introduced to provide a ubiquitous optical access network centralized control function architecture oriented to cross-domain protection, a cross-domain protection function module is further designed, and a corresponding protocol is expanded. Then, a global evaluation strategy is designed on the basis of the architecture, and a decision is made for resource allocation of a protection link by integrating the whole network ubiquitous access resources and the optical convergence layer resources. Finally, an interactive process for realizing cross-domain protection is designed. Compared with the traditional access network, the method can realize more robust network morphology and provide effective service protection service and network performance.
Drawings
Fig. 1 is a schematic diagram of a prior art power distribution communication network carrying distribution of quantum keys.
Fig. 2 is a schematic structural diagram of a CDP-oriented power distribution communication network unified control architecture according to the present invention.
FIG. 3 is a diagram of the functional architecture extension and interface of the controller of the present invention.
Fig. 4 is an OpenFlow protocol extension diagram of the present invention.
Fig. 5 is an interaction flow diagram of the present invention implementing CDP.
Detailed Description
The present invention will be described in more detail with reference to examples.
Example 1
A quantum protection communication service-oriented cross-domain protection networking method for a power distribution communication network comprises the following steps: the method comprises the steps of setting a power distribution communication network unified control framework, wherein the power distribution communication network unified control framework is divided into two planes, namely a data plane and a control plane, the data plane comprises an optical transmission system and an access network system, the optical transmission system is mainly an optical convergence ring network, and the access network system mainly considers a ubiquitous access network formed by overlapping two layers of physical deployment of a wireless multi-hop network and a PON network. The optical transmission system is mainly composed OF a converged ring network, and includes an OpenFlow-enabled WSS (OF-WSS) supporting OpenFlow and an OpenFlow-enabled Core Router (OF-CR) supporting OpenFlow. The wireless multihop network in the access network system includes an OpenFlow-enabled Macro base station (OpenFlow-enabled Micro eNB, OF-Macro eNB) connected to the OF-WSS through an optical fiber, and an OpenFlow-enabled Micro base station (OpenFlow-enabled Micro eNB, OF-Micro eNB) that realizes mutual communication through wireless. The PON network is a typical PON architecture, and includes an OLT (OpenFlow-enabled OLT, OF-OLT) supporting OpenFlow, an optical splitter, and an ONU (OpenFlow-enabled ONU, OF-ONU) supporting OpenFlow, which are connected by optical fibers to form a tree-shaped network structure, where the OF-OLT is connected to the OF-WSS by optical fibers. Meanwhile, an OpenFlow-supported multifunctional Ubiquitous Access Network Device (OF-UAD) exists in the data plane, and one OF-UAD is equivalent to a pair OF interconnected micro base stations and OF-ONU. Communication interconnection among the wireless network PON networks can be realized.
The control plane is composed of a plurality of controllers which are interconnected, and comprises PON controllers (PON controllers, PC), wireless controllers (RC) and Optical Controllers (OC) which respectively correspond to the PON, the wireless network and the Optical network, the controllers are mutually connected through wireless PON Controller interfaces (RPI), wireless Optical Controller interfaces (ROI) and Optical PON Controller interfaces (OPI), network information can be interacted and shared, and network centralized control is realized. The control plane can implement software-defined control on the data plane device through the OpenFlow protocol.
In order to implement the above architecture and provide CDP services with high survivability for users, the functional architectures of PC, RC and OC need to be extended, as shown in fig. 3.
(1) Wireless controller
The wireless controller is mainly responsible for controlling a wireless network layer, and realizes interactive cooperation with other controllers through an interactive interface between the controllers to complete the control of a CDP mechanism. The relevant functional modules are described as follows:
enhanced OpenFlow module: when the state information that the wireless base station interface is occupied is received, the module is used for sending the flow table modification information to upgrade the control interface of the wireless base station and realize wireless resource allocation.
Cross-domain protection interaction agent: the module is mainly used for sharing network resources and state information and processing or sending a CDP request so as to support a CDP mechanism.
Wireless spectrum control and monitor: the system is mainly responsible for compiling and managing the wireless layer network state through an OpenFlow protocol, controlling the relay forwarding of the wireless transmission service, monitoring and integrating the wireless service and the wireless resource occupation state and providing the wireless service and the wireless resource occupation state to a CDP interaction agent.
(2) Light controller
The optical controller is mainly responsible for controlling the optical transmission network, and is used as a core controller to execute necessary calculation and resource allocation processes for the CDP mechanism, and mainly comprises the following modules:
enhanced OpenFlow module: the module is used for sending flow table modification information to upgrade a control interface of the bottom layer optical network equipment so as to realize software defined control of the optical transmission network.
Flow control and monitor: the system is mainly responsible for monitoring, compiling and managing the state OF the bottom layer optical transmission network equipment through an OpenFlow protocol, and configuring each OF-WSS flow table for bottom layer data transmission according to a resource allocation result.
Database management: network real-time status information and resource occupancy information are stored, and optical connection information is stored after optical connection is established.
Cross-domain protection interaction agent: interacting with RC and PC, sharing the information and state of each layer of network resource, generating CDP request, and providing the relevant information to CDP mechanism module to support reasonable and effective distribution of CDP resource.
The CDP mechanism: the system comprises three sub-modules, namely a Path Computation Element (PCE), a protection strategy and a global evaluation strategy. The PCE calculates a protection path for the CDP mechanism, the protection strategy comprises various service protection strategies, and the global evaluation strategy can decide whether to call the CDP strategy and allocate protection resources by evaluating the whole network condition.
(3) PON controller
The PON controller is mainly responsible for monitoring the resource state in the PON network, interacts with other controllers, supports the CDP mechanism together, mainly includes the following modules:
enhanced OpenFlow module: when receiving the state information that the OF-ONU or OF-OLT interface is occupied, the module is used for sending flow table modification information to upgrade the control interface OF the equipment, so as to realize DBA in the PON network.
Cross-domain protection interaction agent: the information interaction with OC and RC is realized through the OPI interface and the RPI interface, and the device is mainly used for sharing network resources and state information and processing or sending a CDP request so as to support a CDP mechanism.
PON control and monitor: the system is mainly responsible for compiling and managing the state OF a PON layer network through an OpenFlow protocol, controlling uplink and downlink transmission OF an OF-ONU and an OF-OLT, monitoring and integrating PON network access service and network state and providing the PON access service and the network state to a CDP interaction agent.
The OpenFlow protocol mainly includes rules (Rule), actions (Action), and states (Stats). The rules include various features In the network, including input/output interfaces (In/Out ports), optical network features including central wavelength (c-wavelength), channel space (channel spacing), PON features including ONU, Time Slot (Time Slot), and Bandwidth (Bandwidth), PON features including radio frequency (RF frequency) and interface constraints (Port constraints), and wireless network features. The behaviors include all executable network behaviors in the network, including Switching (SWITCH), Adding (ADD), removing (DROP), Relaying (REPEAT), unloading (OFFLOAD), loading (ONLOAD), Uploading (UP), Downloading (DOWN), and Deleting (DELETE), and all operational behaviors in the network can be realized by combining the behaviors and the rules in a specific order. The state is then used to monitor the underlying device flow state to provide the necessary data information for the control strategy.
Fig. 5 is a controller and its underlying device interaction flow to implement CDP. The PC, the RC and the OC in the proposed architecture respectively send monitoring requests to corresponding bottom layer equipment according to a certain period, the bottom layer equipment replies the state of the bottom layer equipment to the controller after receiving the monitoring requests, and the controller updates the database of the bottom layer equipment after collecting state information of all the bottom layer equipment. In addition, the OC, as a central controller of the CDP, periodically sends a monitoring request and status information of the optical network to the RC and the PC, and the RC and the PC return status information of all the devices after receiving the request, so that the OC, the RC and the PC all grasp status information of all the devices in the network.
When a service with high survivability requirement arrives, taking a wireless network service as an example, a micro base station sends a service request to an RC (remote control), the RC firstly calculates a main path and occupied resources thereof according to wireless network state information, then sends a protection resource allocation request to an OC, the OC executes a global evaluation strategy to search a reasonable and effective service protection path in a global range after receiving the request, sends CDP (continuous data packet) requests to the PC and the RC respectively to apply for the allocated resources after obtaining the required protection path, the PC and the RC allocate the resources for the service according to the request and return confirmation information, and the OC sends flow mode information to a bottom layer OF-WSS according to the allocation information and allocates an optical transmission network path for the protection path after receiving the confirmation information returned by the PC and the RC. And the OF-WSS configures the optical path and then sends path establishment success information to the OC, finally the OC sends allocation response information to the RC, and then the RC starts to perform corresponding stream transmission on the allocated main path and the allocated protection path by using the allocated resources according to the security strategy. The information types corresponding to all the interactive information are shown in the upper right part of fig. 5, the submitted interactive flow can maximize the repeated utilization of the frame structure, and the complexity of information interaction is effectively reduced.
The parts not described in the present embodiment are the same as those in the prior art.
Example 2
The invention also provides a global evaluation strategy for the distribution condition of the service protection path resources, and can provide effective guidance for the reasonable distribution of the protection resources.
In the OC server, the k alternative links with the shortest path and no repeated links with the main path can be found by using a ksp routing algorithm in the global scope by utilizing the whole network resource condition collected by the OC and the main path information distributed to the service by the RC. And then, finding k alternative wireless links with the shortest path and no repeated links with the main path by using the ksp routing algorithm again in a single layer of the wireless network layer, thereby obtaining 2k alternative paths.
And respectively finding path sections of different domain networks in each path, and further calculating a path resource function value. The network transfer functions of the wireless layer, the PON layer, and the optical convergence layer are shown in formulas (1), (2), and (3), respectively.
Wherein, WnRepresenting the traffic weight, H, of a node on a path in a wireless networkrpRepresenting the number of hops of a path in the wireless network. Since all ONUs in a PON network share bandwidth resources, the weight of a flow through the PON is only related to the total load in the PON, so WmRepresents the traffic buffering amount weight, N, of the mth node in the PONOIndicating the number of ONUs in the PON that pass through, and 0 without passing through. WlRepresenting the traffic weight, H, of an optical fibre link on a path in an optical transmission networkopRepresenting the number of hops on a path in an optical transmission network.
The resource function from which the path can be derived is shown in equation 4:
wherein, alpha, beta, gamma, deltarp、δpo、δroRepresenting the relative proportional weights of the wireless, PON, optical transmission link and the wireless-PON, PON-optical, wireless-optical conversions, respectively. And epsilon (rp), epsilon (po) and epsilon (ro) respectively represent wireless-PON, PON-optical and wireless-optical conversion step functions, if the conversion is carried out, the value is 1, and if the conversion is not carried out, the value is 0.
The global resource optimization factor η can be further obtained by the above formula, and can be calculated by formula (5):
the path with the minimum eta value is the global optimal path, if the optimal path belongs to the global shortest k paths, the CDP is determined, and if the optimal path belongs to the wireless layer network shortest k paths, the CDP is not needed.
The present example is the same as example 1 except for the above-mentioned portions.
Claims (3)
1. A quantum protection communication service-oriented cross-domain protection networking method for a power distribution communication network is characterized by comprising the following steps: the method comprises the steps of setting a power distribution communication network unified control framework, wherein the power distribution communication network unified control framework is divided into two planes, namely a data plane and a control plane;
the data plane comprises an optical transmission system and an access network system, the optical transmission system is an optical convergence ring network, the access network system is a ubiquitous access network layer which is physically deployed and superposed by two layers OF a wireless multi-hop network and a PON network, the convergence ring network layer comprises a wavelength selection switch supporting OpenFlow and a core router supporting OpenFlow, the wireless multi-hop network layer in the access network system comprises a macro base station supporting OpenFlow and connected to OF-WSS through optical fibers, and a micro base station supporting OpenFlow and realizing intercommunication through wireless, the PON network layer is a typical PON architecture and comprises an OLT supporting OpenFlow, an optical splitter and an ONU supporting OpenFlow, and the OLT, the OLT and the OLT supporting OpenFlow are connected to the OF-WSS through optical fibers to form a tree-shaped network structure, the OF-WSS is the wavelength selection switch supporting OpenFlow, and a multifunctional ubiquitous access network device supporting OpenFlow is arranged in the data plane, one OF-UAD is equivalent to a pair OF interconnected micro base stations and OF-ONU, the inter-layer communication interconnection OF the PON network OF the wireless network is realized, and the OF-ONU is an ONU supporting OpenFlow;
the control plane is composed of a plurality of interconnected controllers, and comprises a PON controller PC, a wireless controller RC and an optical controller OC which respectively correspond to a PON network layer, a wireless network layer and an optical network layer, the controllers are mutually connected through a wireless PON controller interface RPI, a wireless optical controller interface ROI and an optical PON controller interface OPI, network information is interacted and shared, network centralized control is realized, and software defined control is realized by the control plane through an OpenFlow protocol on the control of data plane equipment;
(1) the wireless controller is mainly responsible for controlling a wireless network layer, realizes interactive cooperation with other controllers through an interactive interface between the controllers, and completes control of the CDP mechanism module, and comprises the following components: enhanced OpenFlow module, cross-domain protection interaction agent module and wireless spectrum control and monitor:
the enhanced OpenFlow module: when receiving the occupied state information of the wireless base station interface, the module is used for sending flow table modification information to upgrade the control interface of the wireless base station and realize wireless resource allocation;
the cross-domain protection interaction agent module: the module is mainly used for sharing network resources and state information and processing or sending a CDP request so as to support a CDP mechanism module;
the wireless spectrum control and monitor: mainly responsible for compiling and managing the network state of the wireless layer through OpenFlow protocol, control the relay forwarding of the wireless transmission business, monitor and integrate the wireless business and wireless resource occupation state and provide it to CDP interactive agent;
(2) the optical controller is mainly responsible for controlling the optical transmission network, and is used as a core controller to execute necessary calculation and resource allocation processes for the CDP mechanism module, and mainly comprises the following modules: the system comprises an enhanced OpenFlow module, a flow control and monitor, a database management module, a cross-domain protection interaction agent module and a CDP mechanism module;
the enhanced OpenFlow module: the module is used for sending flow table modification information to upgrade a control interface of bottom layer optical network equipment so as to realize software definition control of an optical transmission network;
the flow control and monitor: the system is mainly responsible for monitoring, compiling and managing the state OF the bottom layer optical transmission network equipment through an OpenFlow protocol, and configuring each OF-WSS flow table for bottom layer data transmission according to a resource allocation result;
the database management module: storing network real-time state information and resource occupation information, and storing optical connection information after optical connection is established;
the cross-domain protection interaction agent module: interacting with RC and PC, sharing the information and state of each layer of network resources, generating CDP request, and providing the relevant information to CDP mechanism module to support reasonable and effective distribution of CDP resources;
the CDP mechanism module: the system comprises three sub-modules which are respectively a Path computing unit module, namely a Path computing Element, a PCE, a protection strategy module and a global evaluation strategy module, wherein the PCE computes a protection Path for a CDP mechanism module, various service protection strategies exist in the protection strategy module, and the global evaluation strategy module can determine whether to call the CDP strategy and allocate protection resources by evaluating the whole network condition;
(3) the PON controller PC is mainly responsible for monitoring the resource state in the PON network module, interacts with other controllers, and supports the CDP mechanism module together, and mainly comprises the following modules: the system comprises an enhanced OpenFlow module, a cross-domain protection interaction agent module and a PON control and monitor module;
the enhanced OpenFlow module: when receiving the occupied state information OF the OF-ONU or OF-OLT interface, the module is used for sending flow table modification information to upgrade the control interface OF the equipment, so as to realize DBA in the PON network module;
the cross-domain protection interaction agent module: the information interaction with OC and RC is realized through an OPI interface and an RPI interface, and the system is mainly used for sharing network resources and state information and processing or sending a CDP request so as to support a CDP mechanism module;
the PON control and monitor: the system is mainly responsible for compiling and managing the state OF a PON layer network through an OpenFlow protocol, controlling uplink and downlink transmission OF an OF-ONU and an OF-OLT, monitoring and integrating the access service and the network state OF a PON network module and providing the access service and the network state to a CDP mechanism module interactive agent.
2. The quantum protection communication service-oriented power distribution communication network cross-domain protection networking method according to claim 1, wherein the method comprises the following steps: the OpenFlow protocol mainly comprises rules, behaviors and states, wherein the rules comprise various characteristics in the network, including an input/output interface, optical network characteristics, PON characteristics and wireless network characteristics; the optical network characteristics comprise a central wavelength and a channel space; PON features include ONU, time slot, and bandwidth; and the wireless characteristics include radio frequency and interface limitations; the behaviors include all executable network behaviors in the network, including switching, adding, removing, Relaying (REPEAT), unloading, loading, uploading, downloading and deleting, the behaviors and rules are combined according to a specific sequence to realize all operation behaviors in the network, and the states are used for monitoring the flow state of the underlying equipment to provide necessary data information for a control strategy.
3. The quantum protection communication service-oriented power distribution communication network cross-domain protection networking method according to claim 1, wherein the method comprises the following steps: the global evaluation of the allocation of the service protection path resources specifically includes: in the OC server, the total network resource condition collected by the OC and the main path information distributed to the service by the RC can find k alternative links which have the shortest path and do not have a repeated link with the main path by using a ksp routing algorithm in the global scope, and then find k alternative wireless links which have the shortest path and do not have a repeated link with the main path by using the ksp routing algorithm again in a single layer of a wireless network layer, so that 2k alternative paths are obtained;
respectively finding path sections of different domain networks in each path, further calculating path resource function values, wherein the network transmission functions of a wireless layer, a PON layer and an optical convergence layer are respectively shown as formulas (1), (2) and (3),
wherein, WnRepresenting the traffic weight, H, of a node on a path in a wireless networkrpRepresenting the number of hops of a path in a wireless network, W is the weight of a flow through the PON, which is related only to the total load in the PON, since all ONUs in the PON network share bandwidth resources, and somRepresents the traffic buffering amount weight, N, of the mth node in the PONOIndicating the number of ONUs in the PON passing through, and 0, W, without passing through the ONUslRepresenting the traffic weight, H, of an optical fibre link on a path in an optical transmission networkopRepresenting the number of hops on a path in an optical transport network,
the resource function from which the path can be derived is shown in equation 4:
wherein, alpha, beta, gamma, deltarp、δpo、δroRespectively representing the relative proportion weight of wireless, PON, optical transmission link and wireless-PON, PON-optical and wireless-optical conversion, and epsilon (rp), epsilon (po) and epsilon (ro) respectively representing wireless-PON, PON-optical and wireless-optical conversion step functions, if the conversion is carried out, the value is 1, and if the conversion is not carried out, the value is 0;
the global resource optimization factor η can be further obtained by the above formula, and can be calculated by formula (5):
the path with the minimum eta value is the global optimal path, if the optimal path belongs to the global shortest k paths, the CDP is determined, and if the optimal path belongs to the wireless layer network shortest k paths, the CDP is not needed.
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