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Satellite communication system data scheduling method and device and base station

A technology of system data and satellite communication, which is applied in the field of satellite communication and wireless communication, can solve problems affecting user QoS requirements and low spectrum utilization rate, achieve spectrum utilization rate and maximize bandwidth resource application, cover a large area, and improve spectrum utilization. The effect of utilization

Active Publication Date: 2018-05-01
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to at least solve the problems of low frequency spectrum utilization and QoS requirements of users in the prior art

Method used

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  • Satellite communication system data scheduling method and device and base station
  • Satellite communication system data scheduling method and device and base station
  • Satellite communication system data scheduling method and device and base station

Examples

Experimental program
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Embodiment 1

[0051] In this embodiment, the network side divides three scheduling levels according to the signal-to-noise ratio conditions and modulation and coding methods. Each scheduling level includes the corresponding modulation and coding method, code rate, spectral efficiency, frame, and signal-to-noise ratio demodulation. threshold.

[0052] For example, the three scheduling levels are in descending order according to the number of levels:

[0053] SchdLevel-1 is a level 1 scheduling class, and its corresponding modulation and coding method is QPSK modulation, 1 / 4 code rate, spectral efficiency 0.47, signal-to-noise ratio demodulation threshold -2dB, and the size of a frame scheduling data block is 1991 bytes;

[0054] SchdLevel-2 is a 2-level scheduling class layer, and its corresponding modulation and coding method is 8PSK modulation, 3 / 5 code rate, spectral efficiency 1.71, signal-to-noise ratio demodulation threshold 5.5dB, and the size of the scheduling data block of the fram...

Embodiment 2

[0080] In this embodiment, the network side divides three scheduling levels according to the signal-to-noise ratio conditions and modulation and coding methods. Each scheduling level includes the corresponding modulation and coding method, code rate, spectral efficiency, frame, and signal-to-noise ratio demodulation. threshold.

[0081] Various scheduling priority schemes can be set according to different modulation and coding methods, code rates, spectrum efficiency, frames, and signal-to-noise ratio demodulation thresholds.

[0082] For example, the three scheduling levels are as follows from low to high:

[0083] SchdLevel-1 is a level 1 scheduling class, and its corresponding modulation and coding method is QPSK modulation, 1 / 4 code rate, spectral efficiency 0.47, signal-to-noise ratio demodulation threshold -2dB, and the size of a frame scheduling data block is 1991 bytes; SchdLevel-2 is a 2-level scheduling class layer, and its corresponding modulation and coding method...

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Abstract

The invention discloses a satellite communication system data scheduling method and device and a base station. The method disclosed by the invention comprises the steps of: according to a forward signal-to-noise ratio of a channel where data accessing a terminal is positioned and preset conditions, determining scheduling hierarchies of the data; according to a QoS (Quality of Service) attribute ofthe data in each scheduling hierarchy, determining a scheduling priority of the data; and selecting a scheduling hierarchy with the maximum frame scheduling filling efficiency in the scheduling hierarchies as a current scheduling hierarchy, and by using a frame of the current scheduling hierarchy as a current frame, according to levels of the scheduling hierarchies and the scheduling priorities,carrying out scheduling on data of the current scheduling hierarchy and the scheduling hierarchies with higher levels than the current scheduling hierarchy. According to the invention, not only can the QoS attributes of different application data be ensured, but also spectrum efficiency of a system can be effectively improved, and the requirements of the system for the maximization of the spectrumefficiency and bandwidth resource application are met.

Description

technical field [0001] The invention relates to the technical field of satellite communication and wireless communication, in particular to a data scheduling method, device and base station of a satellite communication system. Background technique [0002] In the DVB-RCS2 standard protocol, the satellite communication system uses TDM (Time Division Multiplexed) transmission in the forward direction, with the frame as the smallest transmission unit, the number of symbols in each frame is fixed, and can only correspond to one modulation and coding mode MCS (Modulation Codes Schema, modulation coding mode), where MCS includes QPSK, 8PSK, 16APSK, 32APSK four modulation modes and a variety of modulation coding modes combined with CR (Code Rates, code rate), each modulation coding mode has a corresponding signal Noise ratio demodulation threshold. [0003] At present, the satellite communication system supports two scheduling modes: ACM (Adaptive Coding and Modulation, adaptive c...

Claims

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Application Information

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IPC IPC(8): H04W72/12H04B7/185
CPCH04B7/18586H04W72/542H04W72/569H04B7/185H04W72/12
Inventor 段敏张豪杰
Owner ZTE CORP
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