Rapid and reliable satellite mobile communication data transmission frame structure and method

Abstract

The invention discloses a rapid and reliable satellite mobile communication data transmission frame structure and method. The system comprises two frame structures of a data frame and a control frame. According to the invention, the single-bit information is used for indicating whether the connection is one-time connection in the data frame header, so that the connection is prevented from being established by signaling interaction, and the early-stage negotiation time is reduced; and a batch response indication is carried in the control frame, and one control frame contains reception acknowledgement information for a plurality of data frames. According to the method, user data segmentation is supported, the user data segments are packaged into data frame structures and inserted into a sending queue, and after a sending window arrives, candidate data frames are continuously taken out from the sending queue to be sent, so that the negative influence caused by satellite communication long time delay is effectively reduced, and the utilization rate of satellite air interface resources is improved. And the receiver is requested to respond to the batch response indication at the last data frame header. And the sender retransmits the failed data frame according to the batch response indication, thereby ensuring reliable transmission of the data.

Description

technical field [0001] The invention belongs to the field of Uu interface high-level protocol of satellite mobile communication system, especially for the geostationary orbit satellite mobile communication system, which can effectively reduce the negative impact brought by long time delay when transmitting data. Background technique [0002] As a powerful supplement to the ground mobile communication system, the current satellite mobile communication system has the advantages of wide signal coverage, strong communication capabilities, and no blind spots in service, and plays an important role in the fields of government, enterprise, emergency and security. Many satellites used for satellite mobile communication are satellites in geostationary orbit, with an altitude of 35,786 kilometers from the ground. It takes 250 milliseconds for the satellite to receive the signal from the ground transmitter and forward it to the ground receiver. The phenomenon that the link itself take...

AI Technical Summary

Problems solved by technology

It takes at least 500 milliseconds for each packet of service data to be sent from the user to receive the air interface delay. For broadband satellite links, most of the time is wasted on waiting for the response. During the waiting process, even if there is new user data, it cannot be sent , reducing the utilization of satellite communication resources

If the sender does not receive a response for a long time, it needs to retransmit the current packet data, which greatly increases the sending time and reduces the user experience

Images