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DAPS switching method, network equipment and user equipment

A message and reconfiguration technology, applied in the field of wireless communication, can solve problems such as communication interruption, achieve the effect of reducing control plane delay, reducing data plane delay, and reducing process complexity

Pending Publication Date: 2022-06-03
武汉世炬信息技术有限公司
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Problems solved by technology

Therefore, UL (uplink) and DL (downlink) transmissions are completed at the source cell before the UE starts communicating with the target cell, resulting in a communication interruption between the UE and the base station for tens of milliseconds

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  • DAPS switching method, network equipment and user equipment
  • DAPS switching method, network equipment and user equipment
  • DAPS switching method, network equipment and user equipment

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Embodiment Construction

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. In order to better understand the solutions of the embodiments of the present application, related terms and concepts that may be involved in the embodiments of the present application are first introduced below.

[0021] Taking the Xn interface switching process as an example, the entire switching process is divided into the following three stages:

(1) Handover preparation: including measurement control and reporting, handover request and co...

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Abstract

The invention relates to a DAPS switching method, network equipment and user equipment, and belongs to the technical field of wireless communication. Comprising the following steps: a source base station receives an RRC reconfiguration completion message; and in response to the RRC reconfiguration completion message, sending an SN state transmission message to the target base station based on an Xn interface, or sending an uplink RAN state transmission message to the 5GC based on an Ng interface, indicating that forwarding of uplink and downlink data SN information is completed, indicating that the target base station performs downlink next PDCP SN, indicating that the uplink first PDCP SDU is lost, and indicating that the uplink first PDCP SDU is lost. The target base station receives an RRC reconfiguration completion message and an SN state transmission message / downlink RAN state transmission message; and in response to the RRC reconfiguration completion message and the SN state transmission message / downlink RAN state transmission message, sending a path switching request to the 5GC, and triggering path switching, according to the invention, the target base station is cancelled to notify the source base station of the switching completion message, so that the control plane time delay is reduced, the message types are reduced, and the process complexity is reduced.

Description

technical field [0001] The invention relates to a DAPS switching method, network equipment and user equipment, and belongs to the technical field of wireless communication technologies. Background technique [0002] Traditional 4G LTE (Long Term Evolution) networks and 5G NR (New Radio) networks until Release R15, the UE (User Equipment) usually releases the connection from the source cell before establishing the connection with the target cell. Therefore, UL (uplink) and DL (downlink) transmissions are completed in the source cell before the UE starts to communicate with the target cell, causing the communication between the UE and the base station to be interrupted for tens of milliseconds. This outage is a critical issue for URLCC (Ultra Reliable Low Latency Communications) scenarios using 5G. [0003] DAPS handover is a dual activation protocol stack handover proposed by 3GPP R16. During the whole handover process, the UE maintains the normal data reception and transmi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/08H04W36/18
CPCH04W36/18H04W36/08Y02D30/70
Inventor 王贻先邵世才颜志凌
Owner 武汉世炬信息技术有限公司
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