Method and system for processing acknowledgment information in acknowledgement mode based on RLC protocol

Abstract

The invention discloses a method for processing acknowledgement information in an acknowledgement mode based on an RLC (Radio Link Control) protocol, which comprises the following steps of: receiving the acknowledgement information by an acknowledgement mode radio link control (AM RLC) entity of a sending end; and judging whether a radio link control protocol service data unit (RLC SDU) is transmitted successfully or not according to the received acknowledgment information, if so, reporting the transmission success message of the successfully transmitted RLC SDU to an upper layer, otherwise, not reporting. The invention further discloses a corresponding processing system. In the invention, as the transmission success message about the successfully transmitted RLC SDU is always reported to the upper layer no mater whether the transmission success acknowledgement of an AMD PDU corresponding to the lower boundary of a sending window is received or not, the transmission success message can be reported in time. Therefore, the storage resources and the transmission resources are saved, and the quality of service is improved.

Description

technical field [0001] The present invention relates to the third-generation mobile communication Long Term Evolution (LTE) technology, and in particular to a method and system for processing acknowledgment information in an acknowledgment mode based on a Radio Link Control (RLC) protocol. Background technique [0002] The RLC of the LTE system generally includes three types of RLC entities: a transparent mode (TM) RLC entity, an unacknowledged mode (UM) RLC entity and an acknowledged mode (AM) RLC entity, wherein the AM RLC entity generally includes an AM RLC entity sending part and The receiving part of the AM RLC entity. During the data transmission process, the receiving part of the AM RLC entity at the sending end mainly receives the radio link control protocol service data unit (RLC SDU) from the upper layer, that is, the Packet Data Convergence Protocol (PDCP) layer. The received RLC SDU is processed and converted into one or more Acknowledged Mode Data Protocol Data ...

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Problems solved by technology

[0017] It can be seen that in the prior art, for RLC SDUs that have been successfully transmitted, the sending end of the AM RLC entity will notify the upper layer that these RLC SDUs have been successfully transmitted only after receiving the confirmation of the AMD PDU whose SN is equal to VT(A) , under such a processing mechanism, even if the RLC SDUs whose SNs of the related AMD PDUs are greater than VT(A) have been successfully transmitted, they cannot immediately report the successful transmission information about these RLC SDUs to the upper layer, so that the upper layer cannot timely report the successful transmission of these RLC SDUs. The message performs operations such as releasing the cache, and even resends the RLC SDU that has been successfully transmitted to the receiving AM RLC entity. For example, during the PDCP reconstruction process, the RLC SDU that has not been confirmed in time may be retransmitted. Therefore, the existing The processing mechanism is easy to cause waste of storage resources and transmission resources, thus affecting the quality of service (QoS) of data transmission

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