Uplink Split Bearer Resource Optimization via Dynamic PDCP Routing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR and LTE, face inefficiencies in uplink data transmission due to unnecessary resource wastage and high block error rates when using split bearers with primary and secondary RLC entities, leading to suboptimal data routing and potential channel condition unawareness.
Innovation Solution
A method for a user equipment (UE) to dynamically decide whether to submit Packet Data Convergence Protocol (PDCP) PDUs to primary or secondary RLC entities based on conditions such as data volume thresholds and channel health, allowing for more efficient resource utilization by relaxing strict data submission rules and considering channel conditions to avoid padding and retransmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If strict data submission rules are applied in split bearer configuration, then data routing is simplified, but resource wastage increases due to unnecessary padding
Solution Approach 1:
The patent applies dynamics by making the data submission rules flexible rather than strict. The UE dynamically adjusts which RLC entity (primary or secondary) receives PDCP PDUs based on real-time conditions such as channel quality and data volume, rather than following fixed submission rules. This dynamic approach allows the system to optimize resource usage by submitting data only when necessary, avoiding unnecessary padding transmissions while maintaining simplified routing through conditional logic.
2Ease of operation
If strict data submission rules are applied in split bearer configuration, then routing decisions are easier to make, but block error rates increase due to channel condition unawareness
Solution Approach 1:
The patent implements feedback by continuously monitoring channel conditions (such as channel quality indicators and data volume) and using this feedback to dynamically adjust data submission decisions. The UE receives feedback about channel state from the network and uses this information to determine whether to submit PDCP PDUs to the primary or secondary RLC entity. This feedback mechanism maintains ease of operation through automated decisions while significantly improving reliability by avoiding transmissions during poor channel conditions that would result in block errors.
3Productivity
If data is submitted to both primary and secondary RLC entities, then throughput is increased, but resource wastage occurs due to redundant transmissions
Solution Approach 1:
The patent applies partial action by submitting PDCP PDUs to only one RLC entity (either primary or secondary) at a time, rather than simultaneously to both entities. The UE evaluates current conditions and selects the most appropriate single target for data submission, performing just enough action to achieve throughput optimization without the excessive resource consumption of redundant dual-submission. This partial approach maintains productivity by ensuring data is transmitted efficiently through the best available path while avoiding the waste of duplicating transmissions across both entities.
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for wireless communications by a user equipment (UE) capable of establishing a split bearer involving at least primary and secondary radio link control (RLC) entities. The techniques generally include deciding, based on one or more conditions, whether to submit a Packet Data Convergence Protocol (PDCP) protocol data unit (PDU) to the primary RLC entity or the secondary RLC entity according to one or more rules and submitting the PDCP PDU to at least one of the primary or secondary RLC entities in accordance with the decision.