Switching method and device in satellite communication system

A satellite communication system and internal handover technology, which is applied to synchronization devices, transmission systems, wireless communications, etc., can solve problems affecting the overall performance of satellite communication systems, shorten the transmission delay of insiders, reduce data interruption time, and ensure services. performance effect

Active Publication Date: 2013-12-04
DATANG MOBILE COMM EQUIP CO LTD
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AI Technical Summary

Problems solved by technology

Such a large data interruption delay will seriously affect the overall performance of the satellite communication system

Method used

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  • Switching method and device in satellite communication system
  • Switching method and device in satellite communication system
  • Switching method and device in satellite communication system

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Embodiment Construction

[0054] In the satellite communication system, in order to avoid the user plane data interruption time in the intra-satellite handover process being too long, the embodiment of the present invention provides a method for improving the intra-satellite handover, specifically: in the scene of the intra-satellite handover, the satellite After the source cell sends a handover command to the satellite terminal and waits for a set period of time, the access point can determine that the satellite terminal has established uplink and downlink synchronization with the target cell without waiting for the handover completion message returned by the terminal, and starts to communicate in the target cell. Scheduling satellite terminals for data transmission to reduce the transmission delay caused by the UE synchronization process and shorten the user plane data interruption time. During this process, the satellite UE does not need to perform the synchronization process in the target cell, that ...

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Abstract

The invention relates to the field of communication, and discloses a switching method and device in a satellite communication system. The method includes the steps that when two cells under a same satellite are switched, a satellite access point sends a switching command to a satellite terminal and waits for setting duration, before a switching completion message returned by the satellite terminal is received, the situation that synchronization of the satellite terminal and a target cell is finished can be judged, and the satellite terminal starts being dispatched to conduct data transmission. Therefore, the user plane data break period when the cells are switched in the same satellite can be effectively shortened, then, manual transmission time delay in the satellite communication system is effectively shortened, and service performance of the satellite terminal and overall performance of the satellite communication system are guaranteed.

Description

technical field [0001] The invention relates to the communication field, in particular to a switching method and device in a satellite communication system. Background technique [0002] In order to take advantage of the industrial advantages of the terrestrial mobile communication system, especially the LTE (Long Term Evolution, long-term evolution) / LTE-Advanced (Long Term Evolution-Advanced, long-term evolution upgrade) system, ITU (ITU) proposes -Advanced system designs the future 4th generation satellite mobile communication system, and requires the terminal to reuse the chip design of the ground terminal as much as possible. [0003] Satellite mobile communication system (also known as satellite communication system) usually has two deployment methods according to the different on-board processing capabilities of satellites. One deployment method is satellite transparent forwarding mode, see figure 1 As shown, the so-called satellite transparent forwarding mode means t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/00H04W36/08H04W56/00H04B7/185
Inventor 鲍炜周海军秦飞高秋彬
Owner DATANG MOBILE COMM EQUIP CO LTD
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