Ground-space communication method and device, and nano satellite

Abstract

The invention provides a ground-space communication method and device, and a nano satellite. The method comprises the steps that the nano satellite broadcasts a time sequence synchronization signal when the nano satellite is overhead a pre-determined ground anchor point; the nano satellite receives a time sequence synchronization request sent by user premises equipment in the pre-determined groundanchor point according to the time sequence synchronization signal; and then the nano satellite sends access permission information to the user premises equipment, so as to build a data connection between the nano satellite and the user premises equipment. The method builds the data connection between the nano satellite and the user premises equipment without deploying dedicated equipment for a return link on the nano satellite, effectively using communication resources of the nano satellite, and solving the problem in the prior art that dedicated equipment cannot be deployed due to limitation of the bearing capability of the nano satellite so as not to form the return link and realize communication between the nano satellite and the ground anchor point in a double connection manner.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular to a method, device and micro-nano satellite for space-to-earth communication. Background technique [0002] In a land mobile communication system, commonly used connection methods include Coordinated Multiple Points (Coordinated Multiple Points, CoMP) and dual connectivity. The CoMP method needs to implement scheduling at the Media Access Control (MAC) layer, and has relatively high requirements on transmission delay and bandwidth between communication nodes, and is suitable for situations where there are optical fiber links between communication nodes. The dual connection method avoids the delay and synchronization requirements in the scheduling process of the MAC layer. The data is divided and merged at the Packet Data Convergence Protocol (PDCP) layer, and then sent to the user through multiple nodes at the same time. For scenarios with high and reliable latency, ...

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Problems solved by technology

[0005] The present invention provides a method, device and micro-nano-satellite for space-to-earth communication to solve the following problems in the prior art: due to the limitation of the carrying capacity of the micro-nano-satellite, it is impossible to deploy special equipment to form a backhaul link to realize micro-nano-satellite Communicate with ground anchors in dual connectivity

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