A mobile communication system and method and device for air interface data transmission

Abstract

The invention provides a mobile communication system and an air interface data transmission method therein. In the present invention, when the sender sends data, the packet data convergence protocol PDCP layer entity sends the transmission control protocol TCP non-control packet data unit PDU response ACK PDU and TCP control PDU ACK to the radio link control RLC layer entity; the RLC layer The entity carries the PDU of the TCP non-control PDU ACK on the first logical channel, and the PDU of the TCP non-control PDU ACK carried on the first logical channel is received in a sequential manner at the receiver; the RLC layer entity The TCP control PDU ACK is carried on the second logical channel, and the TCP control PDU ACK carried on the second logical channel is received by the receiver in a non-sequential manner. The invention also provides a data sending device and a data receiving device in the mobile communication system. The invention can improve the efficiency of air interface data transmission.

Description

technical field [0001] The invention relates to mobile communication technology, in particular to a mobile communication system and an air interface data transmission method and device thereof. Background technique [0002] With the development of communication technology, especially the development of 3G (3rd Generation, third generation mobile communication) technology, terminal users can conveniently access the Internet (Internet) anytime and anywhere through wireless bearer. However, many services and applications on the existing Internet use TCP / IP (Transmit Control Protocol / Internet Protocol, Transmission Control Protocol / Internet Protocol) to implement networking and complete data transmission. Therefore, for operators and equipment manufacturers, it is necessary to make the TCP protocol obtain the best possible transmission performance on the radio bearer. For example, for the Universal Mobile Telecommunications System (UMTS, Universal Mobile Telecommunications Syst...

AI Technical Summary

Problems solved by technology

But this prior art creates new problems

[0011] Since the main function of the PDCP layer on the network side and the MS side in the prior art is the compression function of the TCP / IP header, the data PDU and the control PDU ACK cannot be distributed, resulting in all PDUs regardless of sequence or non-sequence However, if the ACK response of the TCP control PDU is required to be sent in order, it will not be able to reach the sender in time due to the existence of air interface errors, which will lead to a decline in TCP throughput, especially for high-speed download services such as HSDPA. ; On the other hand, it also causes the retransmission timer to expire because the sender cannot receive the ACK in time, thereby increasing unnecessary retransmissions

[0012] That is to say, in the prior art, due to the existence of air interface bit errors, whether the transmission of TCP data PDU and control PDU ACK has a great impact on the efficiency of data transmission, and the control PDU ACK and non-control PDU The PDU of ACK has different requirements on whether it is in sequence, so there is a lack of corresponding technical means to improve the data transmission efficiency of TCP data

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