Method, system and device for data transmission

Abstract

The invention discloses a method, a system and a device for data transmission, belonging to the filed of communication. The method comprises the following steps: a radio network controller RNC enables the data to be transmitted to be preserved to be backup data in a preset buffer memory, and the data is carried with serial numbers; the data to be transmitted is transmitted to the carrier frequency of a base station through a preset channel corresponding to the carrier frequency provided by the base station; each carrier frequency at least corresponds to one channel, and different carrier frequencies correspond to different channels; the transmission state of the data is obtained; the correctly transmitted data preserved in the preset buffer memory in a backing manner is deleted according to the transmission state of the data; the backup data which is not correctly transmitted in the preset buffer memory is obtained, and the channel is selected according to the allocation principle to transmit the backup data which is not correctly transmitted. The system comprises the RNC, the base station and a terminal. By the method provided in the embodiment, the invention can reduce the transmission time delay of the data SDU as possible, ensure the efficiency of data transmission and avoid the unnecessary RLC layer retransmission.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method, system and equipment for sending data. Background technique [0002] UMTS (Universal Mobile Telecommunications System, Universal Mobile Communications System) is a third-generation communication system that adopts WCDMA (Wideband Code Division Multiple Access, Wideband Code Division Multiple Access) air interface technology, and the UMTS system is usually called WCDMA communication The system, wherein the UMTS system adopts a structure similar to that of the second generation communication mobile system, including RAN (Radio Access Network, radio access network) and CN (Core Network, core network). see figure 1 , provides a schematic diagram of a UMTS system structure, specifically including: UE (User Equipment, terminal), RAN, CN, and external networks, such as PSTN (Public Switched Telephone Network, public switched telephone network), Internet; wherein, UE is used ...

AI Technical Summary

Problems solved by technology

Due to different terminals and different types of services that need to be processed, the delay introduced by the two MAC-hs / ehs queues may be very different

[0005] In the prior art, when the RNC sends data to the Node B, the RNC transmits the PDU formed by segmenting the SDU from the PDCP layer through the logical channel of the RLC layer, and the Node B receives the data packet PDU from the RLC layer After that, it is carried on the carrier frequency provided by itself for scheduling and sent to the UE side. When the MAC-hs / ehs queue of Node B receives the report of PDU loss, it needs to retransmit the PDU, resulting in a complete The delay of SDU acquisition, for example, for SDU A 、SDU B and SDUs C , if when scheduling and sending data, due to SDU B A segmented PDU of X loss (may come from a carrier frequency degradation, etc.), which will result in the acquisition of a complete SDU B The delay causes the data obtained by the UE side to wait for a long time at its RLC layer, reducing the efficiency of data transmission

Images