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A data storage and forwarding method for time-division multiplexing inter-satellite network

A network data, storage and forwarding technology, applied in the direction of data exchange network, electrical digital data processing, digital transmission system, etc., can solve the problem of satellite node storage resources and processing capabilities restricting aerospace integration tasks, etc., to improve network execution efficiency , improve real-time performance and reliability, and reduce network congestion

Active Publication Date: 2020-07-14
BEIJING INST OF SPACECRAFT SYST ENG
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Problems solved by technology

Under the conditions of network congestion or limited links, the storage resources and processing capabilities of satellite nodes greatly restrict the execution of aerospace integration tasks

Method used

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  • A data storage and forwarding method for time-division multiplexing inter-satellite network
  • A data storage and forwarding method for time-division multiplexing inter-satellite network
  • A data storage and forwarding method for time-division multiplexing inter-satellite network

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Embodiment Construction

[0029] A time division multiplexing inter-satellite network data storage and forwarding method of the present invention includes the following steps:

[0030] Step 1: Establish a network datagram entity data pool: In the network layer of the space information network integrating space and earth, a fixed-capacity storage space is opened up for network datagrams. Spacecraft nodes can be divided into backbone network nodes or access network nodes according to their roles in the network, and their storage system architectures and the storage capabilities provided by the adopted memory chips are different. When establishing a data pool, customize the size of the data pool according to the actual capability of the onboard computer. The granularity of the storage unit in the data pool is a delimited network data packet, and is compatible with various network data packet formats. Use linked lists or other data structures to establish virtual mappings for the physical entities of stor...

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Abstract

The invention provides a time division multiplexing inter-satellite network data storage and forwarding method, which can meet the real-time performance of storage and forwarding of massive multi-typeand multi-address data under limited satellite storage resources and processing capabilities, improve the search efficiency and reduce the storage occupancy. The method includes the following steps:establishing a network datagram entity data pool, and establishing a virtual memory dynamic preemption data structure according to the entity data pool to form a virtual container; obtaining an idle virtual element node from the entity data pool, filling inter-satellite data in a storage unit pointed to by the virtual element node, and injecting the virtual element node into the virtual container;performing attribute encapsulation on the virtual container, obtaining traffic information of a space information network node according to the frequency of overflow during encapsulation, and adjusting the capacity of the virtual container based on the traffic information; and performing mapping search according to effective element nodes in the virtual container, and carrying out forwarding based on the data priority.

Description

technical field [0001] The invention relates to a time-division multiplexing inter-satellite network data storage and forwarding method, which realizes optimal execution and storage efficiency under the condition of limited processing and storage resources of spacecraft. Background technique [0002] In an inter-satellite network based on time division links, the links between satellites and between satellites and between satellites and ground stations are intermittently available, and the service data in the network supports store-and-forward when routing between ground nodes and satellite nodes. mechanism. [0003] As a time-division multiplexing spatial network with typical spatial delay tolerant networking (DTN) properties, its link delay will be very large, and some links will be available intermittently. Generally, the round-robin link building rule is adopted. With the interconnection of different aerospace systems, different orbits and types of aircraft and applicat...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/185H04L12/725H04L12/801H04L12/851G06F9/455
CPCG06F9/45533H04B7/18521H04L45/30H04L47/12H04L47/24
Inventor 贾卫松张睿燕洪成方峰曾连连王向晖李林张亚航李露铭邱骐
Owner BEIJING INST OF SPACECRAFT SYST ENG
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