Data packet processing method and device

Abstract

The present invention discloses a data packet processing method. On a terminal side, a first serial number (SN) corresponding to a current protocol data unit (PDU), a second SN corresponding to a previous PDU, the sub-frames of a current multicast / multicast single frequency network (MBSFN) and the reset time point of a radio link control (RLC) package serial number (SN) are acquired. The first SN and the second SN are compared. When the first SN and the second SN are not continuous, the unpacking of the PDU is conducted in different ways according to the relationship among the first SN, the sub-frames of the current MBSFN and the reset time point of the SN. The invention also provides a data packet processing device applied on the terminal side.

Description

[0001] This case is a divisional application of a patent application with the application number 201610116326.X, the application date is March 1, 2016, and the invention name is "a data packet processing method and device". technical field [0002] The present invention relates to an enhanced multimedia broadcast / multicast service (eMBMS, ehanced Multimedia Broadcast / Multicast Service), in particular to a data packet processing method and device. Background technique [0003] eMBMS, also known as Long Term Evolution (LTE, Long Term Evolution) broadcast / multicast, is an advanced mobile data transmission technology that enables operators to significantly reduce the cost of providing services such as video and audio to multiple users on the LTE network at the same time. Such as the cost of high-bandwidth content. eMBMS adopts the unacknowledged mode (UM, Unacknowledged Mode) radio link control (RLC, Radio LinkControl) layer transmission method of the LTE standard. This method d...

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Problems solved by technology

[0005] For the terminal side, the continuity of SN is very important. A continuous SN can ensure the continuity and integrity of SDU data; if SN jumps, it means that SDU packet loss may occur; generally, the reason for SN jumping is air interface packet loss , in which case the lost SDU or SDU segment cannot be recovered

[0006] However, in the eMBMS service, the jump of SN is not necessarily due to air interface packet loss; in this scenario, it is possible to ensure the continuity and integrity of SDU data

The eMBMS-related protocol stipulates that at the modification cycle point of the Multicast Control Channel (MCCH, Multicast Control CHannel) or the cycle point of the Multicast Channel Scheduling Information (MSI, Multicast Channel Scheduling Information), the base station side should reset the SN to 0; thus, for the terminal From the perspective of the terminal side, the SN received by the terminal side is likely to be discontinuous; the discontinuity of the SN means intermediate packet loss. In this case, the terminal side as the receiver will discard the previously saved SDU segment information; and, If the first SDU in the PDU with SN equal to 0 is not complete, that is, the SDU is segmented, the SDU will also be discarded

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