Data forwarding method in relay network, device and system

Abstract

The embodiment of the invention provides a data forwarding method in a relay network, a device and a system. The method comprises the steps of performing grouped data aggregation protocol encapsulation on a service data unit corresponding to an unconfirmed first protocol data unit of user equipment, to obtain a second protocol data unit, and sending the second protocol data unit to a target base station, so as to ensure that the target base station obtains the service data unit and a serial number according to the second protocol data unit, and sequentially deliveries the service data unit to the user equipment according to the serial number. The device comprises an encapsulated module and a first transmitting module. The system comprises a source relay node and the target base station. The embodiment performs PDCP (Packet Data Convergence Protocol) encapsulation on the unconfirmed data of UE and then forwards the unconfirmed data of UE to the target base station, and deliveries the unconfirmed data of UE through the target base station, so as to realize the lossless switching between the source RN and the target base station.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of mobile communications, and in particular to a data forwarding method, device and system in a relay network. Background technique [0002] In the Long Term Evolution-Advanc (hereinafter referred to as: LTE-Advance) system, in order to improve the coverage at the cell edge, the original Long Term Evolution (hereinafter referred to as: LTE) radio access network is In the extension, a relay node (Relay Node; RN for short) is introduced to provide a wireless backhaul for an Evolved Packet System (EPS) bearer of a user equipment (User Equipment; UE). Each RN has only one control base station (Donor eNB; hereinafter referred to as: DeNB) to provide wireless backhaul service for it. [0003] If the UE accesses the network from the RN, the data sent by the RN to the UE needs to be encapsulated by Packet Data Convergence Protocol (hereinafter referred to as: PDCP), that is, to encrypt, add ve...

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide a data forwarding method, device, and system in a relay network to solve the problem that in the prior art, the data cache of the source RN contains data that has been encapsulated by PDCP but not confirmed by the UE, so that it is impossible to confirm whether the UE The defects of these data are received correctly, and the lossless handover between the source RN and the target base station is realized

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