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Routing method

A routing and path technology, applied in the field of satellite optical communication, to achieve the effects of rational utilization of resources, network load balancing, and improvement of wavelength utilization

Inactive Publication Date: 2018-03-23
DALIAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Traditional microwave satellites are difficult to meet the requirements of technological development. Laser link satellites have the advantages of large communication capacity, low power consumption, strong confidentiality and invulnerability, fast technology updates, and low cost, which can well meet the needs of satellites. The development needs of communication has become a hot spot in today's research

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Embodiment Construction

[0036] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0037] Establish a MEO / LEO double-layer satellite network topology structure, calculate the sub-satellite trajectory of MEO and LEO satellites within an ephemeris period according to the satellite's orbital parameters and operating ephemeris, and establish LEO based on the principle of "the shortest distance between sub-satellite points" The corresponding relationship with the only MEO satellite divides the LEO satellites into regions, and each region has a MEO satellite as the manager of the region, which aggregates and updates the routing information of the LEO satellites in the region and exchanges routing information in adjacent regions. In the MEO / LEO double-layer all-optical network, there are many inter-satellite links and heavy routing and ...

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Abstract

The invention discloses a routing method. Compared with the prior art, an LEO / MEO (Low Earth Orbit / Medium Earth Orbit) double-layered satellite system structure is used in the application, a space topological structure of an LEO satellite is divided into zones, the routing update is conducted in the zones, an MEO satellite is in charge of routing update and information transmission of the zones, so that the convergence rate of routing in algorithm updating is increased; different numbers of wavelength sets are distributed for different businesses to meet the different business requirements; the link weight takes the residual number of the wavelength and the transmission delay into account and is dynamically changed; moreover, the conflict degree of the wavelength is comprehensively taken into account, and the condition of occupancy of the wavelength by other nodes in the future is taken into account when the routing is determined, so that a chain with the highest conflict degree of thewavelength is delayed to be used. According to the routing method, the network load is balanced, the resource is reasonably used, the use ratio of the wavelength in the satellite network is increased, the communication requirements of different businesses are met, and meanwhile, the blocking rate of the network is greatly reduced.

Description

[0001] This application is a divisional application with application number 2017100541843, application date January 24, 2017, and invention name "multi-service-based satellite all-optical network wavelength routing method". technical field [0002] The invention belongs to the field of satellite optical communication, specifically a routing method. Background technique [0003] With the continuous expansion of application requirements in meteorology, remote sensing and military fields, new requirements are put forward for satellite communication technology. In addition to transmitting traditional telemetry and remote control data, it is also necessary to transmit video, audio, scientific experiments and other types of data in two directions. The amount of transmitted data is large, ranging from a few bits / s to hundreds of megabits / s. Traditional microwave satellites are difficult to meet the requirements of technological development. Laser link satellites have the advantages...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/185H04J14/02H04L12/721H04L12/725H04L12/751H04L45/02
CPCH04B7/18519H04J14/0227H04L45/02H04L45/30H04L45/62
Inventor 刘治国刘庆利姚俊飞
Owner DALIAN UNIV