Physical layer transmission method and device suitable for simple satellite Internet of Things terminal

A technology of Internet of Things terminals and transmission methods, which is applied in the field of physical layer transmission methods, and can solve problems such as limiting system capacity, wasting bandwidth, and large protection time intervals

Active Publication Date: 2021-03-19
四川安迪科技实业有限公司
View PDF24 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] If you want to apply the second-level synchronization in the MF-TDMA system to the Internet of Things, the Internet of Things requires a large number of terminals, and second-level synchronization across the entire network will cause the air interface link to send signaling messages all the time, wasting bandwidth and limiting the system capacity
[0005] If the remote station does not synchronize with the main station and adopts the TDMA system, because the time between the main station and the end station is not calibrated, the link delay is estimated according to GPS, and each effective time slot transmission requires a large guard time interval

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Physical layer transmission method and device suitable for simple satellite Internet of Things terminal
  • Physical layer transmission method and device suitable for simple satellite Internet of Things terminal
  • Physical layer transmission method and device suitable for simple satellite Internet of Things terminal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Based on the aforementioned descriptions about frequency synchronization and time synchronization of TDMA, the flow of the physical layer transmission method suitable for simple satellite Internet of Things terminals provided by this example is as follows: Figure 5 shown.

[0054] S100: Perform a predetermined number of corrections when the satellite Internet of Things terminal is connected to the network, so that the satellite Internet of Things terminal reaches a synchronization state; the predetermined number of times does not exceed 10 times, and the correction includes frequency deviation synchronization and / or time deviation synchronization .

[0055] S200: After the satellite Internet of Things terminal reaches the synchronization state, no more calibration or calibration is performed at a frequency not exceeding 1 day / time.

[0056] The frequency offset synchronization and the time offset synchronization have been described in the foregoing of the specific imp...

Embodiment 2

[0063] In this embodiment, a satellite emergency communication and ubiquitous satellite Internet of Things spectrum sharing device, such as Image 6 As shown, it includes a network access correction module and a correction control module.

[0064] The network access correction module performs a predetermined number of corrections when the satellite Internet of Things terminal is connected to the network, so that the satellite Internet of Things terminal reaches a synchronized state; the predetermined number of times does not exceed 10, and the correction includes frequency deviation synchronization and / or time deviation synchronization.

[0065] The correction control module does not perform correction after the satellite Internet of Things terminal reaches the synchronization state, or performs correction at a frequency not exceeding 1 day / time after the satellite Internet of Things terminal reaches the synchronization state.

Embodiment 3

[0067] This example provides an electronic device, including: at least one processor and a memory; wherein, the memory stores computer-executable instructions; at least one processor executes the computer-executable instructions stored in the memory, so that at least one processor executes the applicable method of Embodiment 1 A physical layer transmission method for a simple satellite Internet of Things terminal.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

A physical layer transmission method and device suitable for a simple satellite Internet of Things terminal are applied to a stationary satellite Internet of Things terminal, and the method comprisesthe following steps: S100, performing correction for a predetermined number of times when the satellite Internet of Things terminal accesses a network to enable the satellite Internet of Things terminal to reach a synchronous state, wherein the preset number of times does not exceed 10, and the correction comprises frequency deviation synchronization and / or time deviation synchronization; S200, when the satellite Internet of Things terminal reaches the synchronization state, carrying out no correction or carrying out correction according to the frequency of no more than 1 day / time. Aiming at the characteristics that the total number of the Internet of Things terminal devices is large and the sending time of each device is short and the interval is long, coarse synchronization is used for transmission, signaling bandwidth occupation caused by high-frequency synchronization such as TDMA complete synchronization is not needed, the guard interval is smaller than that of complete non-synchronization, and the networking capability of the whole system is improved.

Description

technical field [0001] The invention relates to satellite Internet of Things communication technology, in particular to a physical layer transmission method suitable for simple satellite Internet of Things terminals. Background technique [0002] MF-TDMA satellite communication system is mainly used in high-orbit synchronous communication satellites based on the principle of transparent forwarding. The forward link of the communication system adopts large-bandwidth TDM continuous carrier, and the return link adopts MF-TDMA system. The return link in the protocol requires all remote stations in the system network to maintain frequency and time synchronization with the central station, and synchronize at the second level. The time difference between the master station and the terminal station is small, and the accuracy is accurate. [0003] Such as figure 1 As shown, the TDMA network-wide synchronization method when the central station and the remote station that includes m...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/185H04L27/26
CPCH04B7/18519H04B7/18582H04L27/2663
Inventor 黄邓谭苗苗
Owner 四川安迪科技实业有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2023 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap