Method and apparatus for processing data at packet data convergence protocol layer

Abstract

The embodiment of the present disclosure discloses a method and equipment for processing data on a packet data convergence protocol layer. The method comprises receiving packet data units of a packet data convergence protocol sent from at least one of at least one main base station and at least one auxiliary base station at user equipment. The method also comprises sequencing the received packet data units on the packet data convergence protocol layer of the user equipment for realizing at least one of sending to a high layer in sequence or determining lost packet data units. Through the adoption of the method and the equipment of the embodiment of the present disclosure, the sequencing of the packet data units on the packet data convergence protocol layer can be realized and signaling overheads can be reduced.

Description

technical field [0001] Embodiments of the present disclosure relate generally to wireless communication systems. More specifically, embodiments of the present disclosure relate to methods and devices for processing data at a packet data convergence protocol layer in a wireless communication system supporting multiple connections. Background technique [0002] Since low-power nodes can bring gains in capacity expansion and blind spot coverage, more and more researches focus on the deployment and enhancement of secondary cells covered by low-power nodes. Here, the low-power node may be a small base station, examples of which include but are not limited to low-power base stations such as Pico and Femto. In 3GPP R12, a new research item "SmallCell Enhancements for E-UTRA and E-UTRAN Higher-layer aspects" has been approved and one of The key point is to support dual / multiple connectivity to the primary cell (the cell covered by the macro base station) layer and the secondary ce...

AI Technical Summary

Problems solved by technology

Although this is effective in existing systems, for dual connectivity systems, status PDUs may be sent frequently based on different trigger conditions, and the missing PDUs may have various characteristics, such as sparse distribution (because Xn has low loss rate) or a continuous distribution (e.g. due to congestion at Xn)

Obviously, the format of the existing status PDU can no longer meet the requirements of the dual connection situation

[0022] Therefore, a new mechanism is needed to solve the problem of transmission loss due to the Xn interface and out-of-sequence of PDCP PDUs arriving at the UE due to different transmission paths

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