Quick-retransmission method and method in wireless chain control layer determination mode

Abstract

The invention discloses a quick-retransmission method in a wireless chain control layer determination mode. The method comprises the steps that: a sending end resolves negative acknowledgement (NACK) information in a state report; and the sending end judges conditions according to the final group of NACK information, determines data required to be retransmitted, assembles the data required to be retransmitted into a retransmission queue and then sends the data to a receiving end. The invention also discloses a quick-retransmission device in a wireless chain control layer determination mode, which comprises a state report receiving end, a state report resolution unit, a state report judging and determining unit and a data retransmission unit, wherein the state report receiving unit is usedfor continuously receiving state reports from an opposite end; the state report resolution unit is used for resolving the NACK information in the state report; the state report judging and determining unit is used for judging conditions according to the final group of NACK information and determining the data required to be retransmitted; and the data retransmission unit is used for sending the retransmission data assembled in the retransmission queue to the receiving end. When the method and the device of the invention are used, resource waste and time delay can be avoided.

Description

Technical field [0001] The present invention relates to retransmission technology in the field of wireless communication, and in particular to a method and device for rapid retransmission in the automatic retransmission request (ARQ, Automatic Retransmission Request) retransmission process in a radio link control layer protocol entity confirmation mode. Background technique [0002] The radio link control (RLC, Radio Link Control) protocol layer is located under the Packet Data Convergence Protocol (PDCP) layer in the radio interface protocol stack of the Long Term Evolution (LTE) system, and media access control Above the (MAC, Media Access Control) layer is a sublayer of layer 2, where layer 2 is mainly composed of sublayers such as MAC, RLC, and PDCP. The RLC sublayer provides segmentation and retransmission services for user business data and control data. The functions of the RLC sublayer include link control, transfer to the upper layer, namely Radio Resource Control (RRC,...

AI Technical Summary

Problems solved by technology

[0019] To sum up, the disadvantage of using the existing technology is that the receiving end will occupy the limited resources of the next status report in order to receive the fragment 2, and send a group of NACK information composed of NACK_SN, SOstart, and Soend, which increases the redundancy. Additional messages, wasting air interface resources; and the receiving end cannot deliver the received PDU to the upper layer in time due to the lack of segment 2 (SO40~50) in SN6, which may cause delay, and in extreme cases may cause a temporary delay in the receiving sliding window stagnation

At present, there is no effective solution to the problem that the sender needs to retransmit the status report reported by the receiver multiple times, resulting in resource waste and time delay.

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