CN117714385A - Method and system for distributing mixed quantum communication network resources in power grid - Google Patents
Method and system for distributing mixed quantum communication network resources in power grid Download PDFInfo
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Abstract
The invention discloses a method and a system for distributing mixed quantum communication network resources in a power grid, wherein a virtualized communication model is utilized to slice a power system communication network; classical communication resources among different slices are distributed according to application types, the classical communication resources are distributed to each power system application according to the importance of the power system application, then quantum classical power communication resources are distributed to each power system application according to the safety requirement of each power system application, so that the distribution of mixed quantum communication network resources in each power grid is completed, the safety of the power communication system can be improved, the slicing process of a virtualized network and the mutual complementation of the quantum classical power communication resources can be realized, and the information safety of power communication can be improved in each link; meanwhile, the utilization rate of the quantum key resource can be improved, and the limited quantum key is matched with the key request to form an optimal routing scheme, so that the overall benefit of the system is improved to the greatest extent.
Description
Technical Field
The invention belongs to the technical field of communication network resource allocation control, and particularly relates to a method and a system for allocating mixed quantum communication network resources in a power grid.
Background
The rapid development of Information and Communication Technology (ICT) has driven the modernization of smart grids, where power systems and communication networks are tightly coupled. As an indispensable support for smart grids, power communication systems are facing urgent demands for improving safety. On the one hand, with the access of a large number of devices and terminals, the risk of network attacks increases drastically. On the other hand, a failure in the communication system may not only lead to serious consequences, but also cause a cascading failure of the information layer and the physical layer.
However, the advent of the quantum age has threatened the traditional smart grid information encryption system directly. Current encryption methods rely on computational complexity to ensure security, but with the advent of quantum computers equipped with sufficient numbers of qubits, this approach is at risk of being subverted. Thus, there is an urgent need to formulate defenses against these potential threats. Quantum communication combines quantum mechanics principles with cryptographic encryption methods, and is considered as a potential solution, which can ensure unconditional security of information at the physical level.
Quantum Key Distribution (QKD), the most mature and widely used quantum-based technology today, can create a symmetric key between a sender and a receiver. However, although the quantum key has a wide application prospect, the quantum key is still a rare resource limited by engineering, particularly applied to power grid communication, depends on the power grid communication resource and cannot be effectively and reasonably distributed with the existing power grid resource. Therefore, finding an efficient way to manage and utilize quantum resources and combining it with the classical communication infrastructure existing in electrical power systems becomes a critical issue. The traditional quantum safety power system research rarely considers classical communication requests, and does not propose a strategy for optimizing mixed quantum classical communication resources.
Disclosure of Invention
The invention aims to provide a method and a system for distributing mixed quantum communication network resources in a power grid, which are used for solving the problem that the conventional method cannot uniformly distribute quantum communication and current classical resources.
A method for distributing mixed quantum communication network resources in a power grid specifically comprises the following steps:
s1, constructing a virtualized communication model conforming to the characteristics of a power system based on software defined network and network function virtualization;
s2, slicing the power system communication network by utilizing a virtualized communication model according to the application characteristics of the power system, wherein one slice correspondingly carries communication services of one type of power system application;
s3, classical communication resources among different slices are distributed according to application types, and the classical communication resources are distributed to each power system application according to the importance of the power system application in proportion;
and S4, distributing quantum classical power communication resources to the power system applications according to the safety requirements of the power system applications in proportion, thereby completing the distribution of the mixed quantum communication network resources in the power grids.
Preferably, the quantum classical power communication resources are allocated to each power system application in proportion according to the security requirement of the power system application, specifically, according to the received quantum encryption request requirement, the quantum classical power communication resources are allocated according to the security requirement level of the power system application which sends the quantum encryption request requirement, and the higher the security requirement level of the power system application is, the higher the encryption level of the allocated quantum classical power communication resources is.
Preferably, the virtualized communication model comprises an application layer, a control layer and an infrastructure layer;
the infrastructure layer is used for transmitting network information;
the control layer is used for network communication between the application layer and the infrastructure layer;
the application layer is used for bearing application programs.
Preferably, classical communication resources are allocated to each power system application in proportion according to the importance of the power system application, and the allocation and slicing are completed according to the following formula:
N＝[N 1 ,...,N s ,...,N M ] (2)
R＝[R 1 ,...,R s ,...,R M ] (3)
ω＝[ω 1 ,...,ω s ,...,ω M ] (4)
f＝[f 1 ,...,f s ,...,f M ] (5)
R s ＝C s /N s (7)
wherein the slice S belongs to a slice set s= [ S ] 1 ,...,S s ,...,S M ]M is the number of slices, N s ,R s ,ω s ,f s Representing the number of users of the slice, the information transmission rate, the importance degree and the flow of the application of the power system respectively;
C s representing the capacity of slice S;
c represents the total capacity of the channel;
n represents a set of the number of users corresponding to different slices;
N M representing the number of users of the mth slice;
r represents a set of information transmission rates corresponding to different slices;
R M information transmission rate representing the mth slice;
omega represents a set of importance levels of different slices corresponding to power system applications;
ω M representing the application importance degree of the power system corresponding to the Mth slice;
f represents a set of flows of the power system applications corresponding to the different slices;
f M representing the application flow of the power system corresponding to the Mth slice;
the minimum transmission rate of information representing the slice S;
the maximum transmission rate of the information representing the slice S;
representing: slice S can carry a threshold of the number of users.
Preferably, the communication requests and limited quantum resources required for high security are matched according to priorities, with the aim of maximizing system benefit.
Preferably, for each communication requirement r, traversing all feasible routing schemes ap, checking the quantum key number Mcurrent { ap, r } (l) on each link contained in the scheme; if the real-time key can meet the communication requirement, the real-time key is used, and if the real-time key is insufficient, two cases are divided: if the time waiting for generating the key is less than the upper delay limit of the communication requirement, the communication requirement is waited until enough key exists and the waiting time is added to the communication node contained in the communication requirement; if the time waiting for the key to be generated is greater than the upper latency limit of the communication requirement, i.e., sufficient keys cannot be generated within the latency requirement, then the security level is selected to be reduced.
Preferably, if the number of keys is greater than the threshold number of keys Mthr1, the stored key is used in a one-time-pad manner; if the key number is smaller than the threshold key number Mthr1 and larger than the minimum key number Mmin, using the stored key in a sharing mode; if the number of keys is smaller than the minimum number of keys, the number of quantum keys is insufficient, and quantum encryption cannot be performed.
A mixed quantum communication network resource distribution system in a power grid comprises a communication module, a slicing module, a classical communication resource distribution module and a quantum classical power communication resource distribution module;
the communication module is used for storing a virtualized communication model which accords with the characteristics of the power system based on the software defined network and network function virtualization construction;
the slicing module slices the power system communication network by utilizing the virtualized communication model according to the application characteristics of the power system, and one slice correspondingly carries communication services of one type of power system application;
the classical communication resource allocation module allocates classical communication resources among different slices according to application types, and allocates the classical communication resources to each power system application according to the importance of the power system application in proportion;
and the quantum classical power communication resource allocation module is used for allocating the quantum classical power communication resources to the power system applications according to the safety requirements of the power system applications in proportion, so that the mixed quantum communication network resource allocation in the power grids is completed.
Preferably, the virtualized communication model comprises an application layer, a control layer and an infrastructure layer;
the infrastructure layer is used for transmitting network information;
the control layer is used for network communication between the application layer and the infrastructure layer;
the application layer is used for bearing application programs.
Preferably, the quantum classical power communication resources are allocated to each power system application in proportion according to the security requirement of the power system application, specifically, according to the received quantum encryption request requirement, the quantum classical power communication resources are allocated according to the security requirement level of the power system application which sends the quantum encryption request requirement, and the higher the security requirement level of the power system application is, the higher the encryption level of the allocated quantum classical power communication resources is.
Compared with the prior art, the invention has the following beneficial technical effects:
according to the method for distributing the mixed quantum communication network resources in the power grid, provided by the invention, a virtualized communication model which accords with the characteristics of a power system is constructed based on software defined network and network function virtualization; slicing the power system communication network by utilizing a virtualized communication model according to the application characteristics of the power system, wherein one slice corresponds to the communication service carrying one type of power system application; classical communication resources among different slices are distributed according to application types, the classical communication resources are distributed to each power system application according to the importance of the power system application, then quantum classical power communication resources are distributed to each power system application according to the safety requirement of each power system application, so that the distribution of mixed quantum communication network resources in each power grid is completed, the safety of the power communication system can be improved, the slicing process of a virtualized network and the mutual complementation of the quantum classical power communication resources can be realized, and the information safety of power communication can be improved in each link; meanwhile, the utilization rate of the quantum key resource can be improved, and the limited quantum key is matched with the key request to form an optimal routing scheme, so that the overall benefit of the system is improved to the greatest extent.
The invention relates to a mixed quantum communication network resource distribution system in a power grid, which is started by dividing a virtualized network into isolated slices, which is helpful for separating information flows from different power application programs, and then classical communication resources among the different slices are distributed according to application types, and the classical communication resources are distributed to each power system application according to the importance of the power system application in proportion; the method and the system can effectively manage the communication requests of users, and promote the selection of the optimal routing scheme by aligning the limited quantum key with the key requests, thereby maximally improving the overall benefit of the system.
Drawings
Fig. 1 is a schematic flow chart of a method for allocating resources of a hybrid quantum communication network in a power grid according to an embodiment of the present invention.
FIG. 2 is a diagram of a virtualized communication model architecture in accordance with an embodiment of the invention.
Fig. 3 is a flow chart of quantum cryptography communication in an embodiment of the present invention.
Fig. 4 is a schematic diagram of quantum-classical communication in the same optical fiber in an embodiment of the present invention.
Fig. 5 is a schematic diagram of a quantum key distribution communication system in an example of the invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
As shown in fig. 1, the invention provides a method for allocating mixed quantum communication network resources in a power grid, which improves the overall performance of a quantum classical power communication system by optimizing and coordinating and allocating classical resources and quantum resources, and specifically comprises the following steps:
s1, constructing a virtualized communication model conforming to the characteristics of a power system based on a Software Defined Network (SDN) and Network Function Virtualization (NFV);
s2, slicing the power system communication network by utilizing a virtualized communication model according to the application characteristics of the power system, wherein one slice correspondingly carries communication services of one type of power system application;
s3, classical communication resources among different slices are distributed according to application types, and the classical communication resources are distributed to each power system application according to the importance of the power system application in proportion;
and S4, distributing quantum classical power communication resources to the power system applications according to the safety requirements of the power system applications in proportion, thereby completing the distribution of the mixed quantum communication network resources in the power grids.
And (3) evaluating the resource allocation result of the mixed quantum communication network in each power grid: constructing an evaluation index, and comprehensively evaluating the performance of the hybrid quantum-classical communication system from three aspects of channel capacity, communication delay and information security; a hybrid quantum-classical simulation platform was built to evaluate the validity of the strategy by evaluating the above-mentioned indicators.
According to the safety requirements of the power system applications, quantum classical power communication resources are distributed to the power system applications in proportion, specifically, according to the received quantum encryption request requirements, distribution is carried out according to the safety requirement level of the power system applications sending the quantum encryption request requirements, the higher the safety requirement level of the power system applications is, the higher the encryption level of the distributed quantum classical power communication resources is, the matching between communication service with high safety requirements and limited quantum classical power communication resources through priorities can be met, the safety of the power communication system is improved, the slicing process of a virtualized communication model and the introduction of the quantum classical power communication resources are mutually complemented, and the information safety of power communication can be improved in each link; the utilization rate of the quantum key resource is improved, and the limited quantum key is matched with the key request to form an optimal routing scheme, so that the overall benefit of the system is improved to the greatest extent.
The virtualized communication model constructed by the method is shown in fig. 2, and comprises three parts of an application layer, a control layer and an infrastructure layer. Software Defined Networking (SDN) and Network Function Virtualization (NFV) are two common network models of virtualization in communication networks. SDN operates at the network layer of the open system interconnection reference model, while NFV operates at a higher layer. The use of NFV extends the scope of virtualization from applications to devices, as compared to a purely software defined network that is primarily focused on configuring packet flows at the network layer. The core concept is to virtualize the basic network functions and deploy them on commodity servers.
The infrastructure layer comprises a physical layer and a virtual layer, wherein the physical layer is a real network formed by a plurality of communication devices, and concretely comprises a switch, a QKD and other real networks formed by a plurality of communication devices, and the virtual layer is mapped from the physical layer and comprises a plurality of software functions;
the control layer, which takes on the work of the brain in this virtualized architecture, is responsible for bridging between the application layer and the infrastructure layer. The control layer obtains information from the infrastructure layer for the infrastructure layer connected thereto, makes decisions by calculation, and issues instructions to the device. The request is divided into several tasks, and each controller makes a final decision in the set order. The controller with the partial view forms a flowchart that sends a message to each OF the OF switches to manage the information flow. This process is typically normalized by the OpenFlow protocol. The control layer analyzes requests from different application layer programs for the application layer connected with the control layer, and provides corresponding services by managing basic equipment of the bottom layer;
an application layer in which a user can build his own application without regard to the physical device. After the application layer makes a request to the control layer, the base device in the infrastructure layer will send and complete tasks under the command issued by the control layer. This communication process between participants plays a critical role in exchanging information and completing complex applications.
According to the safety requirements of each power system application, quantum classical power communication resources are distributed to each power system application in proportion, mainly quantum classical power communication resource distribution based on a quantum key distribution communication system is realized, and a quantum encryption communication flow realized based on the quantum key distribution communication system is shown in figure 3; a schematic diagram of a quantum key distribution communication system is shown in fig. 4. Quantum networks in quantum key distribution communication systems are formed by adding QKD modules to important user nodes requiring high communication security. The QKD module includes an optical transmission device, a measurement device, and a quantum key storage buffer. The quantum channel is responsible for transmitting and distributing quantum keys between two entities prior to formal communication. After the quantum connection is established, the transmitter encrypts plaintext by using the quantum key and sends the ciphertext to the receiver through the classical channel. The receiver then decrypts the received ciphertext using the pre-obtained key. In this process, any eavesdropping or tampering will inevitably destroy the quantum state being transmitted, resulting in an abnormal fluctuation in the key generation rate. These anomalous disturbances can be identified and the corresponding keys discarded later, ensuring that only the secure keys are retained for further use.
The manner in which quantum keys are sent based on a quantum key distribution communication system is shared between each pair, so here the quantum key storage buffer on the quantum link is virtualized and a model is built to describe its security features, as in fig. 5. A QKD module is mounted to each quantum node and gathers quantum key number information about the quantum link and its associated two quantum key storage buffers. Only if the number of quantum key materials is greater than a preset threshold, the quantum link is considered an available link. The charge rate is set to the key generation rate in consideration of all the above conditions. The current number of quantum keys in the quantum key storage buffer is shown, as is the storage capacity of the quantum key storage buffer, as is the number of basic keys required to establish a quantum connection and to prepare for quantum key generation. This means that the QKD device does not provide the key to the user until the quantum link is established and the generated key reaches a particular value (typically set to 128 x 1024 bits), which is a common threshold for commercial QKD devices.
The classical communication resources are distributed to the power system applications in proportion according to the importance of the power system applications, and the power system applications are distributed and sliced according to the following formula:
N＝[N 1 ,...,N s ,...,N M ] (2)
R＝[R 1 ,...,R s ,...,R M ] (3)
ω＝[ω 1 ,...,ω s ,...,ω M ] (4)
f＝[f 1 ,...,f s ,...,f M ] (5)
R s ＝C s /N s (7)
wherein the slice S belongs to a slice set s= [ S ] 1 ,...,S s ,...,S M ]M is the number of slices, N s ,R s ,ω s ,f s Representing the number of users sliced, the information transmission rate, the importance of the power system application and the traffic, respectively.
C s Representing: the capacity of slice S;
c represents: total capacity of the channel;
n represents: a set of the number of users corresponding to different slices;
N M representing: the number of users of the M th slice;
r represents: a set of information transmission rates corresponding to different slices;
R M representing: information transmission rate of the mth slice;
ω represents: the different slices correspond to a set of importance levels of the power system application;
ω M representing: the application importance degree of the power system corresponding to the M th slice;
f represents: the different slices correspond to a set of flows of the power system application;
f M representing: the power system application flow corresponding to the M th slice;
representing: minimum transmission rate of information of slice S;
the maximum transmission rate of the information representing the slice S;
representing: slice S can carry a threshold of the number of users.
Equation (6) is used to ensure that the capacity allocated for an application request does not exceed the total capacity of the fiber;
equations (7) - (8) describe the relationship between the number of users in a slice and the data rate to ensure that the transmission rate meets the upper and lower limits of user demand and the upper limit of actual slice capacity;
equation (9) defines the upper limit of users that a slice can withstand.
After slicing the power system communication network and forming several application-specific slices, classical communication resources are allocated to each power system application in proportion according to the importance of the power system application, and then mixed quantum communication network resources are allocated. The method specifically matches the communication request and the limited quantum resource required by high security according to the priority, and aims to furthest improve the benefit of the system. Importance is represented by numbers from high to low. When a quantum encryption request is received, the higher the importance of the power system application for the different power system applications, the higher the encryption level assigned to it. For the same power system application, if the request is in one slice, conventional communication restrictions must be considered. The hybrid quantum communication network resource allocation logic is as follows:
and setting a communication demand set R and a feasible routing scheme set AP which are input into the power service, and outputting the result as an optimal routing scheme of all communication demands in different slices. The allocation logic is as follows:
for each communication requirement r, traversing all feasible routing schemes ap, and checking quantum key numbers Mcurent { ap, r } (l) on each link contained in the schemes; if the real-time key can meet the communication requirement, the real-time key is used, and if the real-time key is insufficient, two cases are divided: if the time waiting for generating the key is less than the upper delay limit of the communication requirement, the communication requirement is waited until enough key exists and the waiting time is added to the communication node contained in the communication requirement; if the time waiting for the key to be generated is greater than the upper latency limit of the communication requirement, i.e., sufficient keys cannot be generated within the latency requirement, then the security level is selected to be reduced. The options for lowering the security level fall into three cases: if the number of keys is greater than the threshold number of keys Mthr1, using the stored keys in a one-time-pad manner; if the key number is smaller than the threshold key number Mthr1 and larger than the minimum key number Mmin, using the stored key in a sharing mode; if the number of keys is smaller than the minimum number of keys, the number of quantum keys is insufficient, and quantum encryption cannot be performed. The security of the real-time key is larger than that of the storage key, the security of the one-time-pad mode is larger than that of the sharing mode, and the key with high security is distributed to the communication requirement with high importance according to the logic priority.
Considering the differences between hybrid quantum communication systems and traditional communication systems, specific metrics were constructed from several aspects to calculate performance of both classical and quantum. For classical networks, channel capacity and communication delay are selected; for quantum networks, the security level of each request and key consumption, i.e. information security, is of interest. Three evaluation indexes will be listed below, respectively.
Wherein ap r Is the feasible path corresponding to each communication request, C (l) is the link l at ap r Residual capacity of C max Is the maximum capacity of slice i corresponding to the application type. F (F) iC (ap r ) Representing the utilization of the channel capacity in this feasible path, D (x) is path ap r D is equal to the total communication delay of max Is the upper bound of delay that application i can tolerate.
Equation (12), among other things, illustrates that data leakage from Alice to Bob over the link can help determine the enhancement of the classical communication network by the quantum layer. The meaning of the invention extends to assessing the overall security of the whole network from different aspects, as in equation (13). Where n illustrates the affected packet number. Is the number of all packets transmitted from the source node to the sink node. The security coefficient is related to the encryption method used and is equal to the reciprocal of the security coefficient of the corresponding quantum key. Furthermore, network performance against different network attacks by analyzing the use or non-use of quantum security methods expands this index:
where α is the importance of each application i, β 1 ，β 2 ，β 3 Respectively represent the duty ratio of three evaluation indexes including the channel capacity F iC Time delay F iD And security class F iS . For each application type, beta is followed 1 +β 2 +β 3 =1. This value depends on the communication requirements of the different application types.
The invention develops a hybrid test platform capable of simulating a quantum classical integrated communication system in a Linux system and realizes the functions mentioned in the infrastructure. By utilizing virtualization techniques, the test stand can implement a strategy of high programmability and simplicity. Several simulators are introduced for the proposed virtualized hybrid quantum classical communication system and form corresponding functional blocks. For quantum networks, a quantum key distribution network simulation module QKDNetSim in a widely used network simulator NS-3 was selected to test the quantum key generation process and the quantum security application flow. It inherits the syntax and interface of NS-3 and can establish a connection with an external host or controller through the tapridge. For classical networks, we use mini software to set up SDN switches and hosts. Thus, QKD devices are added to the switch using the TapBridge and communication is achieved through Mininet and NS-3. For the virtualized portion, ryu controllers are used to implement SDN control, openVirteX software may provide a platform for network slicing.
Claims (10)
1. The method for distributing the mixed quantum communication network resources in the power grid is characterized by comprising the following steps of:
s1, constructing a virtualized communication model conforming to the characteristics of a power system based on software defined network and network function virtualization;
s2, slicing the power system communication network by utilizing a virtualized communication model according to the application characteristics of the power system, wherein one slice correspondingly carries communication services of one type of power system application;
s3, classical communication resources among different slices are distributed according to application types, and the classical communication resources are distributed to each power system application according to the importance of the power system application in proportion;
and S4, distributing quantum classical power communication resources to the power system applications according to the safety requirements of the power system applications in proportion, thereby completing the distribution of the mixed quantum communication network resources in the power grids.
2. The method for allocating the mixed quantum communication network resources in the power grid according to claim 1, wherein the quantum classical power communication resources are allocated to each power system application according to the security requirement of the power system application, specifically according to the received quantum encryption request requirement, and according to the security requirement level of the power system application sending the quantum encryption request requirement, the higher the security requirement level of the power system application, the higher the encryption level of the allocated quantum classical power communication resources.
3. The method for allocating resources of a hybrid quantum communication network in a power grid according to claim 1, wherein the virtualized communication model comprises an application layer, a control layer and an infrastructure layer;
the infrastructure layer is used for transmitting network information;
the control layer is used for network communication between the application layer and the infrastructure layer;
the application layer is used for bearing application programs.
4. The method for allocating mixed quantum communication network resources in a power grid according to claim 1, wherein classical communication resources are allocated to each power system application in proportion according to the importance of the power system application, and the allocation is performed and slicing is completed according to the following formula:
N＝[N 1 ,...,N s ,...,N M ] (2)
R＝[R 1 ,...,R s ,...,R M ] (3)
ω＝[ω 1 ,...,ω s ,...,ω M ] (4)
f＝[f 1 ,...,f s ,...,f M ] (5)
R s ＝C s /N s (7)
wherein the slice S belongs to a slice set s= [ S ] 1 ,...,S s ,...,S M ]M is the number of slices, N s ,R s ,ω s ,f s Representing the number of users of the slice, the information transmission rate, the importance degree and the flow of the application of the power system respectively;
C s representing the capacity of slice S;
c represents the total capacity of the channel;
n represents a set of the number of users corresponding to different slices;
N M representing the number of users of the mth slice;
r represents a set of information transmission rates corresponding to different slices;
R M information transmission rate representing the mth slice;
omega represents a set of importance levels of different slices corresponding to power system applications;
ω M representing the application importance degree of the power system corresponding to the Mth slice;
f represents a set of flows of the power system applications corresponding to the different slices;
f M representing the application flow of the power system corresponding to the Mth slice;
the minimum transmission rate of information representing the slice S;
the maximum transmission rate of the information representing the slice S;
representing: slice S can carry a threshold of the number of users.
5. A method of allocating resources of a hybrid quantum communication network in a power grid according to claim 2, wherein the communication requests for high security and the limited quantum resources are matched according to priorities with the aim of maximizing system efficiency.
6. The method for allocating resources of a hybrid quantum communication network in a power grid according to claim 1, wherein for each communication requirement r, traversing all feasible routing schemes ap, checking the quantum key number Mcurrent { ap, r } (l) on each link included in the scheme; if the real-time key can meet the communication requirement, the real-time key is used, and if the real-time key is insufficient, two cases are divided: if the time waiting for generating the key is less than the upper delay limit of the communication requirement, the communication requirement is waited until enough key exists and the waiting time is added to the communication node contained in the communication requirement; if the time waiting for the key to be generated is greater than the upper latency limit of the communication requirement, i.e., sufficient keys cannot be generated within the latency requirement, then the security level is selected to be reduced.
7. The method for distributing resources of a hybrid quantum communication network in a power grid according to claim 6, wherein if the number of keys is greater than a threshold number of keys Mthr1, using the stored keys in a one-time-pad manner; if the key number is smaller than the threshold key number Mthr1 and larger than the minimum key number Mmin, using the stored key in a sharing mode; if the number of keys is smaller than the minimum number of keys, the number of quantum keys is insufficient, and quantum encryption cannot be performed.
8. The mixed quantum communication network resource distribution system in the power grid is characterized by comprising a communication module, a slicing module, a classical communication resource distribution module and a quantum classical power communication resource distribution module;
the communication module is used for storing a virtualized communication model which accords with the characteristics of the power system based on the software defined network and network function virtualization construction;
the slicing module slices the power system communication network by utilizing the virtualized communication model according to the application characteristics of the power system, and one slice correspondingly carries communication services of one type of power system application;
the classical communication resource allocation module allocates classical communication resources among different slices according to application types, and allocates the classical communication resources to each power system application according to the importance of the power system application in proportion;
and the quantum classical power communication resource allocation module is used for allocating the quantum classical power communication resources to the power system applications according to the safety requirements of the power system applications in proportion, so that the mixed quantum communication network resource allocation in the power grids is completed.
9. The hybrid quantum communication network resource allocation system of claim 8, wherein the virtualized communication model comprises an application layer, a control layer, and an infrastructure layer;
the infrastructure layer is used for transmitting network information;
the control layer is used for network communication between the application layer and the infrastructure layer;
the application layer is used for bearing application programs.
10. The system for distributing mixed quantum communication network resources in a power grid according to claim 8, wherein the quantum classical power communication resources are distributed to each power system application in proportion to the security requirement of the power system application, in particular according to the received quantum encryption request requirement, and according to the security requirement level of the power system application which issues the quantum encryption request requirement, the higher the security requirement level of the power system application, the higher the encryption level of the distributed quantum classical power communication resources.
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