Data transmission method, evolved Node B and user equipment

Abstract

The embodiment of the invention discloses a data transmission method, an evolved Node B (eNB) and user equipment, achieving the purposes of avoiding data transmission collision, and improving both data transmission performance and scheduling flexibility. The data transmission method comprises the following steps: selecting a second subframe from a plurality of subframes by the eNB, if the eNB does not rightly receive a data packet sent by (User Equipment) UE on a first subframe; and sending a scheduling signaling to the UE by the eNB, so as to allow the UE to send a retransmission data packet of the data packet on the second subframe. The embodiment of the invention also provides the evolved Node B and the user equipment. According to the invention, the purposes of avoiding data transmission collision and improving both data transmission performance and scheduling flexibility are achieved.

Description

Technical field [0001] The present invention relates to the field of communications, and in particular to a data transmission method, evolved base station and user equipment. Background technique [0002] The duplex mode of the Long Term Evolution (LTE) system mainly includes a Frequency Division Duplexing (FDD) mode and a Time Division Duplexing (TDD) mode. [0003] In the TDD mode, the evolved base station (eNB) and the user equipment (UE, User Equipment) communicate on the same frequency, and the uplink and downlink data transmissions are separated in time. Specifically, a radio frame contains two half frames. A half frame contains five subframes. The TDD mode supports different uplink and downlink configurations. The uplink and downlink configurations can be adjusted semi-statically through system messages according to the average uplink and downlink service requirements. [0004] The LTE TDD system includes seven types of uplink and downlink configuration, as shown in Table 1,...

AI Technical Summary

Problems solved by technology

[0011] When the UE receives the NACK instruction sent by the eNB, the UE will retransmit the data packet to the eNB on the corresponding uplink subframe. After introducing dynamic subframes, if the uplink subframe that the UE originally planned to retransmit the data packet to the eNB is A dynamic subframe, and the dynamic subframe has been adjusted to a downlink subframe by the eNB, there will be a data transmission conflict, so that the UE cannot retransmit the data packet according to the original plan, or the eNB cannot deliver the data packet according to the original plan, thus Affects data transfer performance and scheduling flexibility

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