Method and equipment for transmitting retransmission data

Abstract

The invention discloses a method for transmitting retransmission data of RLC (Radio Link Control) layer in TDS-CDMA (Time Division-Synchronous Code Division Multiple Access) system. During data transmission, data in a retransmission data storage queue is preferentially formed into a data frame to be transmitted to a terminal by setting a storage queue for storing retransmission data of RLC layer for each user terminal in advance at MAC (Media Access Control) protocol stack of a base station, so that the descending data size of a core network caused by transmission failure of RLC layer data is prevented from being reduced, and the influence to the descending speed is reduced. Meanwhile, the invention also discloses equipment for transmitting retransmission data.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a transmission method for retransmission data. The invention also relates to a transmission device for retransmitting data. Background technique [0002] In the HSDPA (High Speed ​​Downlink Packet Access) service of the existing TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) system, the RNC (Radio Network Controller, Radio Network Controller) RLC (Radio Link Control, radio link control) layer through such as figure 1 The shown downlink FP HS-DSCH (High Speed ​​Downlink Shared Channel, High Speed ​​Downlink Shared Channel) data frame sends downlink data to the Node B. Node B saves downlink data in the form of data queue. For any received FP HS-DSCH data frame, Node B uniformly puts the received data into a first-in-first-out queue to wait for scheduling and transmission. The data queue is as follows: figure 2 shown. [0003] For each user, the syst...

AI Technical Summary

Problems solved by technology

However, the existing technology does not distinguish between new RLC data and retransmitted data, and does not perform special processing on the retransmitted data of the RLC layer, so the data retransmitted by the RLC layer of this frame is usually re-stored at the end of the data queue , this packet of retransmission data can only be transmitted after all the data before this packet of data has been transmitted

[0005] In addition, each terminal is equipped with a Mac-hs PDU receiving window. If the data goes out of the window, the terminal discards the data, which causes the RLC layer to retransmit

Since the MAC layer of the existing base station does not distinguish between the newly transmitted data and the retransmitted data of the RLC layer during the scheduling process, the data packets that need to be retransmitted are stored at the end of the user's data queue, which prolongs the transmission time of the frame data. delay, which increases the probability that the terminal receives the frame data out of the window, which in turn causes the core network to reduce the downlink data to the RNC, seriously affecting the downlink rate

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