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A Downlink Data Packet Scheduling Method for Phased Array Agile Beams

A scheduling method and data packet technology, applied in the field of satellite communication, can solve the problems of small effective coverage area of ​​satellites and inability to give full play to the advantages of satellite communication, and achieve the effect of improving resource utilization and ensuring service delay.

Active Publication Date: 2020-11-24
SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the narrower beam means that the effective coverage area of ​​the satellite is smaller, so that the advantages of satellite communication cannot be fully utilized

Method used

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  • A Downlink Data Packet Scheduling Method for Phased Array Agile Beams
  • A Downlink Data Packet Scheduling Method for Phased Array Agile Beams
  • A Downlink Data Packet Scheduling Method for Phased Array Agile Beams

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Experimental program
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Embodiment 1

[0041] For a low-to-medium orbit satellite, assume that an agile beam serves 20 user terminals, all user terminals have the same capability and link status, each time slot can send 30 data packets, and each frame has 40 time slots. The parameters on the control center are [w 1 ,w 2 ,w 3 ] = [6,3,1], [v 1 ,v 2 ,v 3 ]=[1,0.6,0.3], delay threshold T=30, initial normalization threshold Thd=α=1.

[0042] The service in the high-priority queue is low-delay and jitter constant-rate service, and user terminals 1 to 10 have this type of service; the service in the medium-priority queue is constant-rate service with burst; the service in the low-priority queue is burst-low Class service, satellite provides best effort service.

[0043] Such as image 3 As shown in the upper part of , it is the average data packet input volume of services with different priorities for each user terminal. The number of input packets per frame of the high-priority queue of each user terminal is rand...

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Abstract

The invention discloses a downlink data packet scheduling method for phased array agile beams. The method includes: sending parameters by a ground control center; judging whether the current terminal satisfies conditions such as the number of normalized data packets and the maximum time delay ;Schedule the three queues of the current terminal through weighted round-robin; Since multiple judgment conditions such as the number of data packets and time delay are used when scheduling the current user, under the condition of ensuring the data packet delay of the user terminal, as far as possible in each The data packets are sent at full load in each time slot, which improves the satellite downlink capacity.

Description

technical field [0001] The invention relates to a data packet scheduling method used in the satellite communication field, in particular to a downlink data packet scheduling method used for a phased array agile beam. Background technique [0002] In the satellite communication system based on processing and forwarding, data packet scheduling is one of the key technologies, and the use of phased array agile beams has particularity compared with the scheduling of fixed beams, especially in low-to-medium orbit satellite systems. Using high-gain agile beams, one beam needs to serve multiple user terminals, each time slot can only send data packets to one user terminal, and the number of data packets that can be accommodated in each time slot varies with the terminal capability of the user terminal and link status vary. Existing algorithms for wireless resource scheduling such as WRR algorithm (see literature: Improvement of WRR scheduling algorithm in wireless networks: Yin Fen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/865H04L12/863H04L12/875H04L47/6275H04L47/56
CPCH04L47/6275H04L47/6295H04L47/56H04L47/623
Inventor 阳凯王育强唐海刘向陈实华于海强文剑澜张涛
Owner SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP