User Plane Management in 5G Wireless Communication Systems
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Solution Overview
Problem
The existing wireless communication systems, particularly in 5G networks, face challenges in efficiently managing user plane operations during handovers and changes in radio protocol stack functions across centralized and distributed units, leading to delays and data transmission issues.
Innovation Solution
A method and apparatus for managing user plane operations in wireless communication systems, where a UE receives signaling messages from a gNodeB, determines the presence of control information indicating PDCP re-establishment or security key changes, and performs specific operations on data radio bearers, such as regenerating security keys, resetting header compression protocols, and retransmitting PDCP SDUs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional handover procedures are used in 5G networks, then basic data transmission is maintained, but delays occur and data transmission efficiency deteriorates during handovers and network architecture changes
Solution Approach 1:
The patent applies preliminary action by pre-establishing data radio bearers and configuring PDCP entities at the target gNodeB before the handover is actually executed. The UE is pre-configured with target PDCP entity parameters and security keys in advance, so that when handover occurs, the data transmission can immediately resume without waiting for post-handover setup, thereby reducing handover delay and improving data transmission efficiency
Solution Approach 2:
The patent segments the handover process into distinct phases: a preparation phase where target PDCP entities and data radio bearers are pre-configured, and an execution phase where the UE switches to the target cell. This segmentation allows the resource setup to occur independently before handover, eliminating the bottleneck where resource configuration previously occurred after handover execution, thus reducing overall handover time
2Reliability
If PDCP entity re-establishment is performed during handover, then data transmission continuity is improved, but device complexity and operational complexity increase
Solution Approach 1:
The patent applies universality by designing the PDCP entity configuration mechanism to handle multiple scenarios through a unified approach. The same PDCP entity configuration procedures and parameters are used whether the UE is performing handover, recovering from failure, or switching data radio bearers. This multi-functional design simplifies the overall system complexity while ensuring data transmission continuity across different operational contexts
Solution Approach 2:
The patent introduces the target gNodeB as an intermediary that pre-configures PDCP entities and maintains them ready for handover. This intermediary role allows the source and target gNodeBs to coordinate resource allocation before handover, and the target gNodeB to immediately activate pre-configured PDCP entities when the UE arrives, ensuring continuity without requiring complex real-time negotiation during the handover execution phase
Data Source
AI summary
The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). Embodiments herein achieve a UE for managing a user plane operation in a wireless communication system. The UE includes a user plane management unit coupled to a memory and a processor. The user plane management unit is configured to receive a signaling message from a gNodeB. Further, the user plane management unit is configured to determine whether the signaling message includes control information comprising one of a PDCP re-establish indication and a security key change indication. Further, the user plane management unit is configured to perform the at least one operation for at least one data radio bearer based on the determination.