CN109743164B - Method and device for channel resource allocation in a quantum satellite network - Google Patents

Abstract

The invention discloses a channel resource allocation method and device in a quantum satellite network. The method includes: allocating time slots for quantum key transmission to links between satellite nodes in the quantum satellite network; receiving data services in the quantum satellite network At the time of transmission, the transmission path of the data service is obtained; the transmission path includes the transmission sequence between satellite nodes; the data service is sequentially transmitted to the corresponding satellite nodes according to the transmission sequence; each time the data service is transmitted to a When a satellite node is used, the link between the satellite node and the next satellite node is obtained as a transmission link; the quantum key is obtained from the quantum key pool corresponding to the transmission link to encrypt the data service ; The data service transmission in the transmission link allocates time slots, so that the transmission of the data service of each link has a sufficient key amount, and the transmission of the security service is guaranteed.

Description

Method and device for channel resource allocation in a quantum satellite network

technical field

The present invention relates to the technical field of communication, in particular to a method and device for allocating channel resources in a quantum satellite network.

Background technique

With the development of satellite communication, the satellite network will become the backbone of the future integrated communication network of space and space. However, due to the divergent characteristics of laser light, the beam is easy to be eavesdropped by light splitting, and the problem of safe transmission of inter-satellite laser communication needs to be solved urgently. Quantum Key Distribution (QKD) technology has the advantage of absolute security in theory. Based on the "Mozi" quantum satellite that has achieved quantum key distribution between satellites and ground, quantum satellite networking can be realized in the future. Inter-quantum key distribution ensures the security of satellite communication.

However, there are permanently connected links and dynamically connected links in the satellite network. The key generation rate of the permanent link is relatively stable, while the key generation rate of the dynamic link is affected by the change of the transmission distance and the link switching. In a period of time, the amount of keys generated by the dynamic link is smaller than that of the permanent link. If the quantum channels of all links use the same fixed bandwidth allocation, the key generation rate of different links will be inconsistent, the amount of available keys on the dynamic link is small, and the services that need to be transmitted on the dynamic link cannot be obtained. A sufficient amount of keys, thus limiting the transmission capacity of secure services.

SUMMARY OF THE INVENTION

In view of this, the purpose of the present invention is to provide a channel resource allocation method and device in a quantum satellite network, which can enable the transmission of data services of each link to have sufficient key amount and ensure the transmission of secure services.

Based on the above purpose, the method for allocating channel resources in a quantum satellite network provided by the present invention includes:

Allocate quantum key transmission time slots to links between satellite nodes in a quantum satellite network;

When the quantum satellite network receives the data service, obtain the transmission path of the data service; the transmission path includes the transmission sequence between satellite nodes;

The data services are sequentially transmitted to the corresponding satellite nodes according to the transmission sequence;

Each time the data service is transmitted to a satellite node, obtain the link between the satellite node and the next satellite node as a transmission link;

Obtain a quantum key from the quantum key pool corresponding to the transmission link to encrypt the data service;

Time slots are allocated for data traffic transmission in the transmission link.

Further, obtaining the transmission path of the data service when the quantum satellite network receives the data service specifically includes:

obtaining the dynamic topology of the quantum satellite network in one motion period;

dividing the motion period into a plurality of time periods to divide the dynamic topology into a static topology corresponding to each time period;

When the quantum satellite network receives the data service, the shortest transmission path of the data service is calculated according to the static topology corresponding to the received time period.

Further, when the data service is transmitted to a satellite node, the link between the satellite node and the next satellite node is obtained as a transmission link, which specifically includes:

Each time the data service is transmitted to a satellite node, determine whether the current time period has changed;

If so, recalculate the shortest transmission path of the data service according to the static topology corresponding to the current time period, so as to obtain the link between the satellite node and the next satellite node as the transmission link according to the recalculated transmission path.

Further, before the time slot for quantum key transmission is allocated to the links between satellite nodes in the quantum satellite network, the method further includes:

deploying satellite nodes to form the quantum satellite network;

A quantum key pool is deployed for the link between any two adjacent satellite nodes in the quantum satellite network, and the quantum key generated by each link is stored in the corresponding quantum key pool.

Further, the time slot for allocating the quantum key transmission to the link between the satellite nodes in the quantum satellite network specifically includes:

Allocate bandwidth to the quantum channels in each link according to the type of each link; the type of the link includes a permanent link or a dynamic link;

According to the bandwidth allocated by the quantum channel in the link, the time slot of the quantum key transmission is selected.

Further, allocating bandwidth to the quantum channel in each transmission link according to the type of each transmission link specifically includes:

Obtain the key generation amount of the permanent link and the dynamic link in one motion cycle respectively;

Bandwidths are allocated to quantum channels in the permanent link and the dynamic link, respectively, according to the key generation amount.

Further, the allocation of bandwidth to the quantum channels in the permanent link and the dynamic link according to the key generation amount, specifically includes:

Calculate the ratio of the key generation amount of the permanent link to the key generation amount of the dynamic link to be M/N;

Bandwidths are allocated to the quantum channels in the permanent link and the dynamic link, respectively, so that the ratio of the bandwidth of the quantum channel in the dynamic link to the bandwidth of the quantum channel in the permanent link is M/ N.

Further, selecting the time slot for the quantum key transmission according to the bandwidth allocated by the quantum channel in the link specifically includes:

If the link is a permanent link, then according to the bandwidth allocated by the quantum channel in the permanent link, the fixed time slot of the permanent link is selected as the time slot for quantum key transmission;

If the link is a dynamic link, according to the bandwidth allocated by the quantum channel in the dynamic link, the time slot for quantum key transmission is selected for the first time from the available time slots of the dynamic link.

Further, the allocation of time slots for data service transmission in the transmission link specifically includes:

According to the bandwidth required by the data service, the time slot for data service transmission is selected for the first time from the available time slots of the transmission link.

The present invention also provides a channel resource allocation device in a quantum satellite network, which can implement the above-mentioned channel resource allocation method in a quantum satellite network, and the device includes:

a first time slot allocation module, used for allocating time slots for quantum key transmission to links between satellite nodes in the quantum satellite network;

a transmission path acquisition module, configured to acquire the transmission path of the data service when the quantum satellite network receives the data service; the transmission path includes the transmission sequence between the satellite nodes;

a transmission module, configured to sequentially transmit the data services to the corresponding satellite nodes according to the transmission sequence;

a transmission link acquisition module, configured to acquire the link between the satellite node and the next satellite node as a transmission link every time the data service is transmitted to a satellite node;

an encryption module, configured to obtain a quantum key from the quantum key pool corresponding to the transmission link to encrypt the data service;

The second time slot allocation module is used for allocating time slots for data service transmission in the transmission link.

It can be seen from the above that the method and device for channel resource allocation in a quantum satellite network provided by the present invention can pre-allocate time slots for quantum key transmission to links between satellite nodes in the quantum satellite network, and receive time slots in the quantum satellite network. When the data service is used, the transmission link of the data service is obtained, so that when the data service is transmitted to the transmission link, the quantum key is obtained from the quantum key pool corresponding to the transmission link, and the data service is encrypted and sent to the transmission link. Time slots are allocated for quantum key transmission in the transmission link, so that the transmission of the data service of the transmission link has sufficient key quantity, and the transmission of the security service is guaranteed.

Description of drawings

1 is a schematic flowchart of a method for allocating channel resources in a quantum satellite network according to an embodiment of the present invention;

2 is a distribution diagram of a quantum satellite network in a method for allocating channel resources in a quantum satellite network provided by an embodiment of the present invention;

3 is a link channel distribution diagram in a channel resource allocation method in a quantum satellite network provided by an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of an apparatus for allocating channel resources in a quantum satellite network according to an embodiment of the present invention.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

Referring to FIG. 1, it is a schematic flowchart of a method for allocating channel resources in a quantum satellite network provided by an embodiment of the present invention. The method includes:

S1. Allocate quantum key transmission time slots to links between satellite nodes in the quantum satellite network.

Specifically, step S1 includes:

Allocate bandwidth to the quantum channels in each link according to the type of each link; the type of the link includes a permanent link or a dynamic link;

According to the bandwidth allocated by the quantum channel in the link, the time slot of the quantum key transmission is selected.

In this embodiment, in the quantum satellite network, a time-division multiplexing method can be used to allocate a certain time slot, that is, a bandwidth, to the quantum channel, so that quantum key distribution can be performed at the same time as data service transmission. The mixed transmission of the quantum channel and the data channel in this embodiment is based on the time division multiplexing method. The entire channel is divided into several time slices or slots, and these time slots are allocated to each channel of signals for use. The bandwidth of the signal is the occupied number of time slots. A certain time slot is allocated to the quantum channel, and quantum key distribution can be continuously performed while the data service is being transmitted.

Further, allocating bandwidth to the quantum channel in each link according to the type of each link specifically includes:

Obtain the key generation amount of the permanent link and the dynamic link in one motion cycle respectively;

Bandwidths are allocated to quantum channels in the permanent link and the dynamic link, respectively, according to the key generation amount.

Further, the allocation of bandwidth to the quantum channels in the permanent link and the dynamic link according to the key generation amount, specifically includes:

Calculate the ratio of the key generation amount of the permanent link to the key generation amount of the dynamic link to be M/N;

Bandwidths are allocated to the quantum channels in the permanent link and the dynamic link, respectively, so that the ratio of the bandwidth of the quantum channel in the dynamic link to the bandwidth of the quantum channel in the permanent link is M/ N.

It should be noted that the key generation rate of the links between satellite nodes is estimated according to the change rule of the satellite topology in a movement cycle, and the key generation amount of each link in a movement cycle time is obtained as its key generation rate. Key generation rate. The permanent link is relatively stable, and the fixed key generation rate per unit time can be multiplied by one cycle time as the key generation amount, and the dynamic link can use the average key generation rate in its duration multiplied by the duration as the key generation amount .

According to the obtained key generation amount of each link, the bandwidth of the dynamic link quantum channel is increased in a corresponding proportion to improve its key generation rate. Assuming that the amount of permanent link key generation in a time period is M, and the amount of dynamic link key generation is N, then the bandwidth of the dynamic link quantum channel is M/N times that of the persistent link, and then for each chain The channel sets the bandwidth of the quantum channel.

Further, selecting the time slot for quantum key transmission according to the bandwidth allocated by the quantum channel in the link specifically includes:

If the link is a permanent link, then according to the bandwidth allocated by the quantum channel in the permanent link, the fixed time slot of the permanent link is selected as the time slot for quantum key transmission;

If the link is a dynamic link, according to the bandwidth allocated by the quantum channel in the dynamic link, the time slot for quantum key transmission is selected for the first time from the available time slots of the dynamic link.

It should be noted that when the quantum key time slot is allocated, according to the bandwidth allocated for the quantum channel, the time slot is selected for the quantum channel among the available time slots. The method of selecting the time slot can be fixed time slot or dynamic time slot. The time slot is to allocate a fixed number of time slots for the quantum channel; the dynamic allocation of time slots is to use the first hit to select the available time slot for quantum transmission.

S2. When the quantum satellite network receives the data service, obtain the transmission path of the data service; the transmission path includes the transmission sequence between satellite nodes.

Specifically, step S2 includes:

obtaining the dynamic topology of the quantum satellite network in one motion period;

dividing the motion period into a plurality of time periods to divide the dynamic topology into a static topology corresponding to each time period;

When the quantum satellite network receives the data service, the shortest transmission path of the data service is calculated according to the static topology corresponding to the received time period.

In this embodiment, the satellites in the quantum satellite network are periodic and predictable, so the change rule of the link between satellites can be predicted. After obtaining the dynamic topology of the satellite in one motion period, the time slicing method is used to divide one motion period of the satellite into several time periods, thereby dividing the dynamic topology into discrete static topologies. When the data service arrives, the corresponding static topology is obtained according to the time period, and then the shortest transmission path of the data service is calculated according to the link weight matrix. Wherein, the transmission path includes the transmission sequence between the source satellite node and the destination satellite node.

S3. The data services are sequentially transmitted to the corresponding satellite nodes according to the transmission sequence.

In this embodiment, the top k shortest path algorithm is used to obtain several candidate paths, and then the shortest transmission path satisfying the resource requirement is screened out, so as to transmit the data service according to the shortest transmission path. Since the satellite network topology may change in different time periods, it may be necessary to switch the transmission path during the transmission of data services.

S4. Each time the data service is transmitted to a satellite node, obtain a link between the satellite node and the next satellite node as a transmission link.

Specifically, step S4 includes:

Each time the data service is transmitted to a satellite node, determine whether the current time period has changed;

If so, recalculate the shortest transmission path of the data service according to the static topology corresponding to the current time period, so as to obtain the link between the satellite node and the next satellite node as the transmission link according to the recalculated transmission path.

In this embodiment, when the satellite network topology changes, due to the switching of the links between satellites, the data service may need to switch the transmission path. Therefore, it is necessary to determine whether the satellite network topology has occurred when the data service is transmitted to each satellite node. Change. If there is a change, the data is cached at the satellite node, and the transmission path is recalculated for switching, and the next satellite node on the switched transmission path is acquired for transmission until it is transmitted to the destination satellite node; if no change occurs, then Obtain the next satellite node for transmission according to the original transmission path until it reaches the destination satellite node.

S5. Obtain a quantum key from a quantum key pool corresponding to the transmission link to encrypt the data service.

Further, before the time slot for quantum key transmission is allocated to the links between satellite nodes in the quantum satellite network, the method further includes:

deploying satellite nodes to form the quantum satellite network;

A quantum key pool is deployed for the link between any two adjacent satellite nodes in the quantum satellite network, and the quantum key generated by each link is stored in the corresponding quantum key pool.

It should be noted that the quantum satellite network is deployed first, that is, the quantum satellite nodes are deployed, each satellite node is used as a quantum transceiver node and a data forwarding node, and the time division multiplexing method is used to make the quantum channel and the data channel in the same laser. transmission over the link.

In quantum networking based on terrestrial optical fiber networks, point-to-point communication can provide unconditional security through quantum keys. However, for long-distance quantum key distribution, quantum relays are required to solve the loss of quantum transmission. Free-space quantum transmission gets rid of the distance limitation of optical fiber-based quantum communication, and can realize long-distance quantum key distribution. Through the distribution of quantum keys between the satellite and the satellite, the communication security of the satellite network can be guaranteed, and a quantum satellite network covering the whole area can be established. However, the quantum key generation rate is mainly affected by the link transmission distance, link duration and satellite position. Due to the long distance between satellites, the key generation rate is low, which is difficult to meet the real-time needs of security services. Therefore, the generated quantum key can be stored at each pair of satellite nodes. Each pair of satellite nodes, that is, each link, builds a quantum key pool, and the quantum keys are continuously distributed between nodes and stored in the key pool. , to ensure that the security business has enough keys.

In the process of data service transmission, according to the bandwidth and key amount required by the data service, signaling is sent along the transmission path, bandwidth is reserved when transmitting to a satellite node, and the corresponding quantum key is taken out from the quantum key pool. The key is used for encryption services.

S6. Allocate time slots for data service transmission in the transmission link.

Specifically, step S6 includes:

According to the bandwidth required by the data service, the time slot for data service transmission is selected for the first time from the available time slots of the transmission link.

It should be noted that, when the data service timeslots are allocated, according to the bandwidth required by the data service, several timeslots for service transmission are first hit and selected from the timeslots available for the data service.

When the data service is transmitted to the destination satellite node, the transmission of the data service is completed, and the reserved and occupied bandwidth resources are removed.

As shown in Fig. 2, a series of discrete static topologies can be obtained by dividing a time period of a satellite into several intervals. Taking one topology as an example, the topology contains two orbits. Each satellite node has quantum transceiver equipment and laser transceiver equipment. Time division multiplexing is used for quantum key distribution and data transmission at the same time. Each pair of nodes builds a quantum key pool to store the quantum key of the link between the two points. According to the periodic change rule of the dynamic link, the key rate of each link is estimated, and the bandwidth of the quantum channel is allocated to balance the key generation of different links. Figure 3 shows the different bandwidth allocation of quantum channels of permanent link and dynamic link. Based on time division multiplexing, the entire channel is divided into several time slots, and the number of time slots is used as the bandwidth.

For example, in Figure 2, data traffic is transmitted from node 1 to node 4, and data traffic is transmitted through permanent links and dynamic links, wherein solid lines between nodes represent permanent links, and dashed lines between nodes represent dynamic links. Part of the bandwidth is used for quantum key transmission, and the rest is used for data traffic transmission. The time slot allocation process for data services and quantum channels is as follows: (1) allocate time slots for the quantum channels of each link; (2) request establishment of data services from node 1 to node 4, and obtain the current topology according to time; (3) ) Calculate the route, and the transmission path is node 1-node 2-node 4; (4) every time a node passes through a node to determine whether routing switching is required; (5) allocate resources for services, and reserve link bandwidth at nodes 1, 2, and 4 , take out the quantum key provided to the service; (6) search the available time slot of the link, and select the time slot of the data service; (7) the data service transmission is completed.

The method for allocating channel resources in a quantum satellite network provided by the present invention can allocate time slots for quantum keys by means of time division multiplexing, realize data transmission and key distribution in the same link, and store continuous data at the satellite node at the same time. Generated quantum keys to ensure that there are enough keys for the business; by increasing the bandwidth of the quantum channel of the dynamic link, increasing the number of time slots used for quantum transmission in the dynamic link, and improving the quantum key generation rate of the dynamic link, thus The key generation rate of the dynamic link and the permanent link is consistent, so that the key generation amount of each link is balanced; the problem of insufficient key amount of the dynamic link is solved, and the service transmission on the dynamic link is avoided. Capacity constraints have improved the ability of satellite networks to transmit quantum encryption services.

Correspondingly, the present invention also provides a channel resource allocation device in a quantum satellite network, which can realize all the processes of the channel resource allocation method in the above-mentioned quantum satellite network.

Referring to FIG. 4, it is a schematic structural diagram of a channel resource allocation device in a quantum satellite network provided by an embodiment of the present invention, and the device includes:

The first time slot allocation module 1 is used for allocating time slots for quantum key transmission to links between satellite nodes in the quantum satellite network;

The transmission path acquisition module 2 is used for acquiring the transmission path of the data service when the quantum satellite network receives the data service; the transmission path includes the transmission sequence between the satellite nodes;

A transmission module 3, configured to sequentially transmit the data services to the corresponding satellite nodes according to the transmission sequence;

Transmission link acquisition module 4, for acquiring the link between the satellite node and the next satellite node as a transmission link every time the data service is transmitted to a satellite node;

An encryption module 5, configured to obtain a quantum key from the quantum key pool corresponding to the transmission link, to encrypt the data service;

The second time slot allocation module 6 is configured to allocate time slots for data service transmission in the transmission link.

The channel resource allocation device in the quantum satellite network provided by the present invention can allocate time slots for quantum keys by means of time division multiplexing, realize data transmission and key distribution in the same link, and store continuous data at the satellite node at the same time. Generated quantum keys to ensure that there are enough keys for the business; by increasing the bandwidth of the quantum channel of the dynamic link, increasing the number of time slots used for quantum transmission in the dynamic link, and improving the quantum key generation rate of the dynamic link, thus The key generation rate of the dynamic link and the permanent link is consistent, so that the key generation amount of each link is balanced; the problem of insufficient key amount of the dynamic link is solved, and the service transmission on the dynamic link is avoided. Capacity constraints have improved the ability of satellite networks to transmit quantum encryption services.

Those of ordinary skill in the art should understand that the discussion of any of the above embodiments is only exemplary, and is not intended to imply that the scope of the present disclosure (including the claims) is limited to these examples; under the spirit of the present invention, the above embodiments or There may also be combinations between technical features in different embodiments, steps may be carried out in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.

Additionally, well known power/ground connections to integrated circuit (IC) chips and other components may or may not be shown in the figures provided in order to simplify illustration and discussion, and in order not to obscure the present invention. . Furthermore, devices may be shown in block diagram form in order to avoid obscuring the present invention, and this also takes into account the fact that the details regarding the implementation of these block diagram devices are highly dependent on the platform on which the invention will be implemented (i.e. , these details should be fully within the understanding of those skilled in the art). Where specific details (eg, circuits) are set forth to describe exemplary embodiments of the invention, it will be apparent to those skilled in the art that these specific details may be used without or with changes The present invention is carried out below. Accordingly, these descriptions are to be considered illustrative rather than restrictive.

Although the present invention has been described in conjunction with specific embodiments thereof, many alternatives, modifications, and variations to these embodiments will be apparent to those of ordinary skill in the art from the foregoing description. For example, other memory architectures (eg, dynamic RAM (DRAM)) may use the discussed embodiments.

Embodiments of the present invention are intended to cover all such alternatives, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omission, modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (9)

1. a channel resource allocation method in a quantum satellite network, is characterized in that, comprises: Allocating time slots for quantum key transmission to links between satellite nodes in the quantum satellite network; the time slots for quantum key transmission are allocated based on the key generation amount of the link in one motion cycle; When the quantum satellite network receives the data service, obtain the transmission path of the data service; the transmission path includes the transmission sequence between satellite nodes; The data services are sequentially transmitted to the corresponding satellite nodes according to the transmission sequence; Each time the data service is transmitted to a satellite node, obtain the link between the satellite node and the next satellite node as a transmission link; Obtain a quantum key from the quantum key pool corresponding to the transmission link to encrypt the data service; allocating time slots for data traffic transmission in the transmission link; The allocating time slot for data service transmission in the transmission link specifically includes: According to the bandwidth required by the data service, a first hit algorithm is used to select a time slot for data service transmission from the available time slots of the transmission link. 2. The method for allocating channel resources in a quantum satellite network according to claim 1, wherein when the quantum satellite network receives a data service, the transmission path of the data service is obtained, specifically comprising: obtaining the dynamic topology of the quantum satellite network in one motion period; dividing the motion period into a plurality of time periods to divide the dynamic topology into a static topology corresponding to each time period; When the quantum satellite network receives the data service, the shortest transmission path of the data service is calculated according to the static topology corresponding to the received time period. 3. The method for allocating channel resources in quantum satellite network according to claim 2, is characterized in that, when the described data service is transmitted to a satellite node, obtain the information between the satellite node and the next satellite node. The link is used as a transmission link, including: Each time the data service is transmitted to a satellite node, determine whether the current time period has changed; If so, recalculate the shortest transmission path of the data service according to the static topology corresponding to the current time period, so as to obtain the link between the satellite node and the next satellite node as the transmission link according to the recalculated transmission path. 4. the channel resource allocation method in the quantum satellite network according to claim 1, is characterized in that, before the described time slot of quantum key transmission is allocated to the link between satellite nodes in the quantum satellite network, also comprises: deploying satellite nodes to form the quantum satellite network; A quantum key pool is deployed for the link between any two adjacent satellite nodes in the quantum satellite network, and the quantum key generated by each link is stored in the corresponding quantum key pool. 5. the channel resource allocation method in the quantum satellite network according to claim 1, is characterized in that, described to the time slot of quantum key transmission to the link between satellite nodes in the quantum satellite network, specifically comprises: Allocate bandwidth to the quantum channels in each link according to the type of each link; the type of the link includes a permanent link or a dynamic link; According to the bandwidth allocated by the quantum channel in the link, the time slot of the quantum key transmission is selected. 6. The method for allocating channel resources in a quantum satellite network according to claim 5, wherein the bandwidth is allocated to the quantum channel in each transmission link according to the type of each transmission link, specifically comprising: Obtain the key generation amount of the permanent link and the dynamic link in one motion cycle respectively; Bandwidths are allocated to quantum channels in the permanent link and the dynamic link, respectively, according to the key generation amount. 7. The method for allocating channel resources in a quantum satellite network according to claim 6, wherein the bandwidth is allocated to the quantum channels in the permanent link and the dynamic link respectively according to the key generation amount , including: Calculate the ratio of the key generation amount of the permanent link to the key generation amount of the dynamic link to be M/N; Bandwidths are allocated to the quantum channels in the permanent link and the dynamic link, respectively, so that the ratio of the bandwidth of the quantum channel in the dynamic link to the bandwidth of the quantum channel in the permanent link is M/ N. 8. The method for allocating channel resources in a quantum satellite network according to claim 5, characterized in that, according to the bandwidth allocated by the quantum channel in the link, the time slot of the quantum key transmission is selected, specifically comprising: : If the link is a permanent link, then according to the bandwidth allocated by the quantum channel in the permanent link, the fixed time slot of the permanent link is selected as the time slot for quantum key transmission; If the link is a dynamic link, according to the bandwidth allocated by the quantum channel in the dynamic link, a first hit algorithm is used to select a quantum key transmission time slot from the available time slots of the dynamic link. 9. A channel resource allocation device in a quantum satellite network, capable of realizing the channel resource allocation method in a quantum satellite network according to any one of claims 1 to 8, wherein the device comprises: a first time slot allocation module, used for allocating time slots for quantum key transmission to links between satellite nodes in the quantum satellite network; a transmission path acquisition module, configured to acquire the transmission path of the data service when the quantum satellite network receives the data service; the transmission path includes the transmission sequence between the satellite nodes; a transmission module, configured to sequentially transmit the data services to the corresponding satellite nodes according to the transmission sequence; a transmission link acquisition module, configured to acquire the link between the satellite node and the next satellite node as a transmission link every time the data service is transmitted to a satellite node; an encryption module, configured to obtain a quantum key from the quantum key pool corresponding to the transmission link to encrypt the data service; The second time slot allocation module is used for allocating time slots for data service transmission in the transmission link.

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