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Bandwidth and power coordinated allocation method in inter-satellite communication link

A technology for coordinated power distribution and communication links, which is applied in the field of inter-satellite communication system design, and can solve problems such as high requirements for initial value selection and difficult nonlinear programming

Active Publication Date: 2016-08-10
NANJING UNIV
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Problems solved by technology

However, traditional optimization methods are difficult to deal with nonlinear programming problems, and they have relatively high requirements for the selection of initial values ​​for problem solving. Only when the initial point is relatively close to the global optimal point can it be possible to find the real optimal solution

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  • Bandwidth and power coordinated allocation method in inter-satellite communication link
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  • Bandwidth and power coordinated allocation method in inter-satellite communication link

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Embodiment Construction

[0056] The present invention will be further elaborated below by describing a preferred specific embodiment in detail in conjunction with the accompanying drawings.

[0057] Such as figure 1 As shown, a bandwidth and power coordination allocation method in the inter-satellite communication link, the algorithm is based on the Lagrangian dual theory and the subgradient method, the algorithm includes:

[0058] S1, determining that the satellite is in a normal communication phase. The step S1 includes:

[0059] S1.1, time slot application stage.

[0060]The inter-satellite wireless communication system requires that the time slot of each satellite node is unique, and the newly added slave satellite node must ensure that its own response time slot will not conflict with the response time slot of the existing equipment in the satellite network after joining the satellite network. After the new slave satellite node joins the satellite network, it first applies for a time slot. Aft...

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Abstract

The invention discloses a bandwidth and power coordinated allocation method in inter-satellite communication links. The bandwidth and power coordinated allocation method is implemented based on a Lagrangian duality theory and a subgradient method, and comprises the steps of: determining that satellite are in a normal communication stage; establishing an inter-satellite communication system model according to channel parameters, and determining an optimization object; comprehensively considering system capacity and service requirement of each communication link, conducting modeling for the optimization object; adopting a gradient descent method for acquiring a calculation method of power and bandwidth allocated to each communication link; and solving the optimal power and the optimal bandwidth required by an inter-satellite communication link system. The bandwidth and power coordinated allocation method disclosed by the invention has the advantages of being fast, efficient and stable, increasing system capacity of the satellite system, reducing calculation workload, and has relatively high utilization rate of on-satellite resources.

Description

technical field [0001] The invention relates to a design of an inter-satellite communication system, in particular to a method for coordinating and allocating bandwidth and power in an inter-satellite communication link. Background technique [0002] Due to its huge advantages in reliability, cost, and performance, the space formation flying small satellite system has attracted more and more attention from the international aerospace field, and has broad application prospects. Inter-satellite communication is responsible for information exchange tasks between small satellites, between small satellites and relay satellites, and between relay satellites and geosynchronous satellites. The inter-satellite communication link is the best means to complete data interaction between satellites, and it is also a necessary prerequisite for realizing multi-point communication between satellites. In space communication, on-board resources are very precious, but there is also a phenomeno...

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Application Information

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IPC IPC(8): H04B7/185H04L12/24
CPCH04B7/1851H04L41/0896H04L41/145Y02D30/70
Inventor 叶芝慧张羽卢莎
Owner NANJING UNIV
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