Split Bearer Primary Path Reconfiguration in 5G UE
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, particularly in 5G networks, UEs transitioning from RRC_INACTIVE to RRC_CONNECTED face challenges with SCG configuration validity and efficient data transmission, leading to unnecessary signaling and inefficiencies due to the need for EN-DC release and reconfiguration.
Innovation Solution
The method involves the UE autonomously reconfiguring the primary path of split bearers to use only the MCG L2 entity for data transmission when transitioning from RRC_INACTIVE to RRC_CONNECTED, allowing continuous data transmission without releasing the SCG configuration, thereby reducing signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE performs EN-DC release procedure when transitioning from RRC_INACTIVE to RRC_CONNECTED, then the SCG configuration is released, but additional signaling overhead is generated
Solution Approach 1:
The UE performs preliminary assessment of SCG configuration validity before transitioning states. The UE checks whether the SCG configuration is still valid using stored validity information before deciding to release it, avoiding unnecessary release procedures when the configuration remains valid.
Solution Approach 2:
The UE autonomously manages the SCG configuration release decision based on its own stored validity information. The UE independently determines whether to release the SCG configuration without requiring network intervention, thereby reducing signaling overhead while maintaining configuration validity.
2Reliability
If the UE always releases SCG configuration when resuming RRC connection, then configuration validity is ensured, but data transmission efficiency is reduced
Solution Approach 1:
The UE performs preliminary validation checks before releasing SCG configuration. By checking stored validity information in advance, the UE can determine whether the SCG configuration remains valid and should be preserved for efficient data transmission, avoiding unnecessary releases that would reduce transmission efficiency.
Solution Approach 2:
The UE changes the decision parameter for SCG configuration release from a fixed rule (always release) to a dynamic parameter based on validity assessment. The UE uses stored validity information to dynamically determine whether to release the configuration, optimizing both reliability and transmission efficiency.
3Reliability
If the network performs DC release or RRC connection reconfiguration procedure, then bearer type change to MCG bearer is achieved, but additional signaling is required
Solution Approach 1:
The UE autonomously manages bearer type transitions by independently assessing SCG configuration validity and making release decisions. This self-service approach eliminates the need for network-initiated DC release or reconfiguration procedures, thereby reducing signaling overhead while maintaining proper bearer type management.
Solution Approach 2:
The UE performs preliminary assessment of whether bearer type change is needed by checking SCG configuration validity. This preliminary action allows the UE to determine whether network procedures are necessary or if autonomous management suffices, reducing unnecessary signaling.
4Ease of operation
If the UE excludes data transmission via all bearers including SCG RLC bearer, then transmission simplicity is achieved, but transmission efficiency is reduced
Solution Approach 1:
The UE performs preliminary validation of SCG configuration before excluding it from data transmission. By checking validity information in advance, the UE can determine whether SCG bearers should be used for transmission, maintaining simplicity while preserving efficiency when configurations are valid.
Solution Approach 2:
The UE changes the transmission management parameter from a fixed exclusion policy to a dynamic selection based on configuration validity. The UE uses stored validity information to dynamically determine which bearers to use, optimizing both operational simplicity and transmission efficiency.
Data Source
AI summary
Provided are a method for performing, by a user equipment (UE), transmission via only a primary path in a wireless communication system, and an apparatus supporting the same. The method may include: configuring a split bearer, which has multiple L2 entities for both a master cell group (MCG) and a secondary cell group (SCG); when the UE transits from a first state to a second state, reconfiguring the primary path of the split bearer autonomously; and performing the transmission via only the primary path of the split bearer, wherein the primary path is related to an L2 entity for the MCG.