Method for data transmission and network-side equipment

Abstract

The invention provides a method for data transmission and network-side equipment. The method comprises the followings steps: building a mapping relationship between a first identification of data which are required to transmit in a first retransmission request process and a second identification of data which are required to transmit in a second retransmission request process, wherein the first retransmission request process and the second retransmission request process are located at different layers which are used for transmitting the data, and the layer at which the first retransmission request process is located is higher than the layer at which the second retransmission request process is located; and transmitting the data, and updating the transmitting status information of the data in the first retransmission request process by the second retransmission request process in accordance with the transmitting status of the data and the mapping relationship so as to determine whether the data are retransmitted by the first retransmission request process in accordance with the transmitting status information of the data. According to the invention, the first and second retransmission request processes related to the sharing of the transmitting status information of the same data can be implemented at a transmitting end; and the use ratio of frequency spectrum resources in the reliable transmission process of the data can be improved.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a data transmission method and network side equipment. Background technique [0002] Automatic Repeat Request (Automatic Repeat Request, ARQ for short) and Hybrid Automatic Repeat Request (Hybrid ARQ, HARQ for short) are effective means to improve reliability of data transmission. ARQ has time diversity gain. The sending end sends a frame of data. If the receiving end finds an error in this frame, it will notify the sending end to resend. At this time, the sending end resends the same data as the previous frame; usually the receiving end will discard it. Error frame and wait to receive resent data. HARQ has combining gain and time diversity gain. If the receiving end receives an error frame that cannot be repaired, it will notify the sending end to retransmit the frame, but the receiving end will not discard the error frame, but store it and wait for retransmissio...

AI Technical Summary

Problems solved by technology

Or, in the existing technology, ARQ and HARQ are combined to retransmit the same data in parallel, such as: HARQ is not sorted but ARQ is sorted, HARQ retransmission and ARQ are retransmitted in parallel, or ARQ is only based on timeout retransmission, not based on the receiving end NACK message retransmits data

[0004] In the process of practicing the prior art, the inventor found that if HARQ sorting and ARQ sorting are enabled at the same time, although the same data can be serially retransmitted, since ARQ retransmission depends on the feedback information from the receiving end, the introduction of The time delay is relatively large; and if HARQ and ARQ are used for parallel retransmission, it will lead to a large retransmission bandwidth overhead and reduce the utilization of spectrum resources

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