Data transmission method and wireless access network element

Abstract

The embodiment of the invention provides a method for data transmission. When cross-domain switchover happens, a transportation control protocol (TCP) performance-reinforcing module corresponding to aTCP connection of the receiving end where cross-domain switchover takes place is established in a target domain according to the information connected by TCP at the receiving end where cross-domain switchover happens, so as to be used for data transmission, wherein the information connected by TCP comprises a source port, a destination port, a source address and a destination address. When crossRNC or eNB switchover happens to UE in the embodiment of the invention, option information of both sending and receiving part at the primary stage of TCP connection before RNC or eNB switchover happens can be obtained by reestablishing the TCP performance-reinforcing module, thereby continuously optimizing the performance of TCP data transportation, in particular applying to wireless network system where small area switchover happens frequently.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a data transmission method and a wireless access network element. Background technique [0002] In a wired network, loss and retransmission of transmission control protocol (TCP, Transmission Control Protocol) data packets are mainly caused by network congestion. Compared with the wired network, the transmission environment of the wireless network is relatively harsh, and its channel quality often shows instantaneous changes. For example, the quality of the wireless channel suddenly deteriorates due to some reason, and then returns to normal in a short time. Packet loss and retransmission caused by such sudden deterioration of wireless channel quality often make TCP mistakenly believe that the network is congested, thereby starting a congestion control mechanism (for example, entering slow start or window halving operation, etc.). Once the channel quality suddenly improves...

AI Technical Summary

Problems solved by technology

[0004] Since the information recorded by the TPE is only carried in the three-step handshake phase when the TCP connection is established, once the user equipment (UE, User Equipment) has a cross-domain handover behavior, that is, the UE transfers from a radio network controller (RNC, Radio Network When the area controlled by the Controller) or the area covered by the evolved base station (eNB, evolution NodeB) (source domain) crosses the area controlled by another RNC or the area covered by the eNB (target domain), generally speaking, the new The area (target domain) no longer has the TPE performance enhancement module held by the current receiver and sender when the TCP connection is established, so it is no longer possible to optimize the performance of TCP data transmission

Images