Method for processing automatic retransmit request data

Abstract

This invention discloses a method for processing automatic re-transmission required data, which is divided into two states of forward shifting SDU and ARQ PDU to target base stations: when forward shifting SDU to the target base station, only needing to determine the ending position of the correct continuous receiving data by UE, and the target base station sending the rest SDU behind the ending position to the UE, when forward shifting ARQ PDU to the target base station, the original base station learning the last ARQ PDU received correctly, then forward shifting an ARQ PDU behind the last one to the target base station, the target station reorganizing the ARQ PDU to SDU and then re-segmenting the reorganized SDU according to the own section strategy and generating the ARQ PDU, then sending the ARQ PDU to the UE. According to the above description, the inventive method not only avoids the target base station re-transmitting the data received by the UE to the UE, effectively saves the resource, but also avoids various problems caused by inconsistent section strategies of the original base station and the target base station.

Description

technical field [0001] The present invention relates to packet switching technology, in particular to a method for processing Automatic Repeat reQuest (ARQ, Automatic Repeat reQuest) data after packet switching. Background technique [0002] The 3rd Generation Partnership Project (3GPP, 3rd Generation Partnership Project) is studying network evolution in order to enhance the competitiveness of future networks. The evolved 3G network should have the technical characteristics of high speed, low delay, and IP. In order to achieve this goal, in the field of Radio Access Network (RAN, Radio Access Network) research, a series of related technical issues including mobility management must be solved. The handover in the 3G network needs to be researched and described from two aspects of the control plane (CP, Control Plane) and the user plane (UP, User Plane). From the perspective of the handover process, the handover can be divided into three stages: preparation, execution, and co...

AI Technical Summary

Problems solved by technology

If the source NB does not cache the ARQ SDU, the source NB can also forward the cached ARQ PDU to the target NB when the UE is handed over, but since the segmentation methods of each NB are different, and the ARQ PDU from the source NB is very It may be discontinuous ARQ PDU. In this way, the target NB will restore the ARQ PDU to ARQ SDU through very cumbersome and complicated operations. In order to avoid this problem, it is necessary to require the segmentation strategy of the source NB and the target NB. It is completely consistent in time, but this is very unrealistic in terms of technical implementation

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