Unlock instant, AI-driven research and patent intelligence for your innovation.

A terminal tracking area maintenance method independent of cell switching in a low-orbit satellite communication system

A satellite communication system and cell handover technology, applied in transmission systems, wireless communication, radio transmission systems, etc., can solve the problems of excessive TA, increase terminal power consumption and air interface overhead, and paging message air interface overhead, etc. The effect of small air interface overhead, avoiding signaling storms, and saving power consumption

Active Publication Date: 2021-11-16
成都天奥集团有限公司
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 1. If the TA is too large, the air interface overhead for paging messages will be high;
[0008] 2. A reasonable TA size will cause frequent TA updates, which will bring signaling storms to the core network and increase terminal power consumption and air interface overhead

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
  • A terminal tracking area maintenance method independent of cell switching in a low-orbit satellite communication system
  • A terminal tracking area maintenance method independent of cell switching in a low-orbit satellite communication system
  • A terminal tracking area maintenance method independent of cell switching in a low-orbit satellite communication system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Such as image 3 As shown, under the pedestrian scene, the steps of the technical solution adopted by the present invention are as follows:

[0027] Step 1: After the terminal is turned on, initiate the network access process. The network side acquires the cell CellId_a where the terminal is located.

[0028] Step 2: If the terminal is in a non-idle state, the network side counts the historical cell switching frequency of the terminal, and finds that the switching frequency of the terminal basically occurs once in 9410 milliseconds. And 9410 milliseconds is the typical duration of beam switching caused by satellite movement only when the low-orbit satellite is at an altitude of 1175 kilometers and the terminal is stationary. The calculated switching frequency jitter deviation of the terminal is 0. The network side can infer that the terminal is basically in a static state. It can be seen from Table 1 that, for such a terminal which is equivalent to a static state, p...

Embodiment 2

[0034] Such as Figure 4 As shown, under the unmanned aerial vehicle scene, the steps of the technical solution adopted by the present invention are as follows:

[0035] Step 1: After the terminal is turned on, initiate the network access process. The network side can obtain the CellId_a of the cell where the terminal initially accesses the network.

[0036] Step 2: If the terminal is in a non-idle state, the network side counts the historical cell switching frequency of the terminal, and finds that the switching frequency of the terminal is 9500 milliseconds. The calculated jitter deviation is 90 milliseconds. Check Table 1. In this scenario, it is recommended that the TA update cycle be every 4 minutes. If the drone terminal is in an idle state, the terminal calculates a jitter deviation of 90 milliseconds based on the historical cell reselection frequency, if the frequency of cell reselection is around 9500 milliseconds, then the TA update cycle is once every 4 minutes. ...

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

The invention discloses a terminal tracking area maintenance method irrelevant to cell switching under a low-orbit satellite communication system, which belongs to the field of satellite communication. For a terminal in a non-idle state, the network side sets the period for reporting the terminal tracking area information according to the frequency jitter deviation of cell handover in the terminal; for a terminal in an idle state, the terminal selects an appropriate TA update period according to the frequency jitter deviation of cell reselection . The greater the frequency jitter deviation of the terminal cell handover / reselection, the shorter the corresponding tracking area reporting period, and vice versa. The network side can obtain the cell information according to the tracking area information reported by the terminal last time, combine the ephemeris information and the work plan, and calculate the tracking area of ​​the user. For the problem of frequent switching of cells in the low-orbit satellite communication system, the invention can effectively avoid the signaling storm caused by the tracking area reporting process, and at the same time significantly reduce the air interface overhead caused by the process.

Description

technical field [0001] The invention belongs to the field of mobile communication, and relates to a terminal tracking area maintenance method irrelevant to cell switching under a low-orbit satellite communication system. [0002] technical background [0003] With the development of wireless communication, people can use terminals to communicate under the coverage of ground mobile networks, but the coverage of ground mobile networks is limited, and it is difficult to build stations in oceans, deserts and some remote areas, and the signal is difficult to cover. Achieving global and seamless coverage of communication services has become the main goal of the current wireless communication field. The low-orbit satellite communication system provides a more flexible and better coverage option. Taking the satellite mobile communication system in the low-orbit satellite communication system as an example, the satellite mobile communication system can achieve global seamless coverag...

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 Patents(China)
IPC IPC(8): H04W36/00H04W68/02H04B7/185
CPCH04B7/18519H04W36/0055H04W68/02
Inventor 刘田商科峰张毅谢岸宏汤辉
Owner 成都天奥集团有限公司