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Dropping forwarded PDCP SDU during dual activation protocol stack handover

A technology of GTP-U and message sending, applied in the field of wireless communication

Pending Publication Date: 2021-05-11
INTEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This drop is especially useful for DAPS HO if the source decides to repeat the forwarding for reliability, but the source link quality is still good and there is a lot of DL delivery from the source side
[0007] As a flow control mechanism for PDCP PDUs, such discarding has been done on X2-U / Xn-U / F1-U (see 3GPP TS38.425V15.6.0 (2019-07-13), hereinafter referred to as "TS 38.425") , but in DAPS HO, forwarding PDCP SDUs so that the source can utilize PDCP repetitions is still under development

Method used

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  • Dropping forwarded PDCP SDU during dual activation protocol stack handover
  • Dropping forwarded PDCP SDU during dual activation protocol stack handover
  • Dropping forwarded PDCP SDU during dual activation protocol stack handover

Examples

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Embodiment Construction

[0025] A detailed description of systems and methods consistent with embodiments of the invention is provided below. While several embodiments have been described, it should be understood that the invention is not limited to any one embodiment, but encompasses numerous alternatives, modifications, and equivalents. Additionally, while numerous specific details are set forth in the following description in order to provide a thorough understanding of the embodiments disclosed herein, some embodiments may be practiced without some or all of these details. Furthermore, for the purpose of clarity, certain technical material that is known in the prior art has not been described in detail to avoid unnecessarily obscuring the present invention.

[0026] Several embodiments are proposed in this application to implement discarding of already forwarded PDCP SDUs in DAPS HO.

[0027] 1. DL user frames in TS 38.428 are reused for discarding:

[0028] Consideration may be given to reusi...

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Abstract

The invention relates to discarding a forwarded PDCP SDU during dual activation protocol stack handover. One embodiment relates to an apparatus of a first BS, the apparatus comprising: a memory; a processing circuit operably coupled to the memory; and an interface in communication with at least one second BS, the apparatus being configured to: send a HO command to the UE to perform a HO process; allocate an SN for each PDCP SDU; and forward the PDCP SDU with the SN to the at least one second BS as a part of the HO process, wherein the HO command indicates a DAPS HO with the at least one second BS. According to the embodiment of the invention, the discarding of the forwarded PDCP SDU can be realized.

Description

[0001] related application [0002] This application requires the name "DISCARDING FORWARDED PACKET DATA CONVERGENCE PROTOCOL SERVICE DATA UNITS DURING DUAL ACTIVE PROTOCOL STACK HANDOVER (discarding forwarded packet data convergence protocol service data unit during dual activation protocol stack switching process)", submitted on November 8, 2019 Priority benefit of U.S. Provisional Application Serial No. 62 / 933,251. The disclosure of this provisional application is incorporated herein by reference in its entirety. technical field [0003] In general terms, embodiments of the present invention relate to the field of wireless communications. More specifically, embodiments of the present invention relate to dropping forwarded Packet Data Convergence Protocol (PDCP) Service Data Units (SDUs) during Dual Active Protocol Stack (DAPS) Handover (HO). Background technique [0004] DAPS HO is being studied as a work item (WI) "Even further MobilityEnhancement in E-UTRAN (Evolved U...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W28/06H04W4/30
CPCH04W28/06H04W4/30
Inventor 韩载珉A·西罗特金
Owner INTEL CORP
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