A channel resource allocation method and device in a quantum satellite network
A satellite network and channel resource technology, which is applied in the field of channel resource allocation in quantum satellite networks, can solve problems such as the small amount of available keys for dynamic links, limit the transmission capacity of secure services, and fail to obtain sufficient keys to ensure transmission Effect
Active Publication Date: 2019-05-10
BEIJING UNIV OF POSTS & TELECOMM +1
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Problems solved by technology
If the quantum channels of all links use the same fixed bandwidth allocation, the key generation rates of different links will be inconsistent, the amount of available keys for dynamic links is small, and the services that need to be transmitted on dynamic links cannot be obtained. Sufficient key volume, thus limiting the transmission capacity of secure services
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[0048] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.
[0049] see figure 1 , is a schematic flowchart of a method for channel resource allocation in a quantum satellite network provided by an embodiment of the present invention, and the method includes:
[0050] S1. Allocate time slots for quantum key transmission to links between satellite nodes in the quantum satellite network.
[0051] Specifically, step S1 includes:
[0052] Allocating bandwidth to 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;
[0053] According to the bandwidth allocated by the quantum channel in the link, the time slot for the transmission of the quantum key is selected.
[0054] In this embodiment, in the quantum s...
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The invention discloses a method and a device for allocating channel resources in a quantum satellite network. The method comprises the following steps of: allocating a quantum key transmission time slot to a link between satellite nodes in the quantum satellite network; When the quantum satellite network receives a data service, obtaining a transmission path of the data service, Wherein the transmission path comprises a transmission sequence between satellite nodes; Sequentially transmitting the data services to corresponding satellite nodes according to the transmission sequence; When the data service is transmitted to one satellite node, obtaining a link between the satellite node and the next satellite node as a transmission link; Obtaining a quantum key from a quantum key pool corresponding to the transmission link so as to encrypt the data service. The data service transmission in the transmission link allocates the time slot, so that the transmission of the data service of eachlink has enough key quantity, and the transmission of the security service is ensured.
Description
technical field [0001] The invention relates to the field of communication technology, in particular to a channel resource allocation method and device in a quantum satellite network. Background technique [0002] With the development of satellite communication, the satellite network will become the backbone network of the future aerospace integrated communication network. However, due to the divergent characteristics of the laser, the beam is easy to be split and eavesdropped. The problem of safe transmission of inter-satellite laser communication needs to be solved urgently. Quantum key distribution (Quantum Key Distribution, QKD) technology has the advantage of absolute security in theory. Based on the "Mozi" quantum satellite that has realized the quantum key distribution between the satellite and the ground, the quantum satellite network can be realized in the future. Inter-quantum key distribution guarantees the security of satellite communication. [0003] However, t...
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IPC IPC(8): H04L9/08H04B10/70H04B10/85
Inventor 赵永利黄东海郁小松刘枫齐维孔张杰
Owner BEIJING UNIV OF POSTS & TELECOMM