PDCP Packet Prioritization Across Dual Connectivity RLC Legs
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Solution Overview
Problem
Existing wireless communication systems, particularly in 5G NR, face challenges in efficiently transmitting high-priority data packets in dual connectivity scenarios, leading to potential delays and inefficiencies in data delivery.
Innovation Solution
The proposed solution involves a transmitting device prioritizing high-priority data packets by transmitting them using whichever Radio Link Control (RLC) leg provides a grant first, irrespective of the data volume, and employing a data split threshold volume to determine RLC entity usage for non-high-priority data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data packets are transmitted using a data split threshold volume approach, then resource utilization is optimized, but high-priority data packets may experience delays
Solution Approach 1:
The patent segments data packets into high-priority and non-high-priority categories, and further divides non-high-priority packets into first and second sets based on volume thresholds. This segmentation allows different transmission strategies for different packet types, ensuring high-priority packets receive immediate attention while optimizing resource allocation for non-priority packets.
Solution Approach 2:
The patent dynamically adjusts transmission behavior based on packet characteristics and channel conditions. The transmitting device determines whether to transmit scheduling information for both RLC legs or only the first RLC leg based on real-time assessment of data volume and priority, enabling adaptive resource allocation that balances speed and efficiency.
2Reliability
If scheduling information is transmitted via both RLC legs, then data delivery reliability is improved, but transmission overhead increases
Solution Approach 1:
The patent applies different transmission strategies to different RLC legs based on local conditions. The transmitting device assesses whether to activate the second RLC leg for scheduling information transmission based on specific criteria (data volume, packet priority), creating a differentiated transmission approach that optimizes both reliability and overhead for each leg's specific context.
Solution Approach 2:
The patent employs partial action by transmitting scheduling information via only the first RLC leg when data volume is below a threshold or for certain packet types, rather than always using both legs. This selective approach maintains sufficient reliability for critical packets while reducing overhead for less critical transmissions.
3Speed
If high-priority data packets are transmitted immediately regardless of data volume, then data delivery speed is improved, but resource allocation efficiency decreases
Solution Approach 1:
The patent changes transmission parameters based on packet characteristics and volume thresholds. The device adjusts whether to transmit scheduling information for both RLC legs or only the first leg based on real-time parameters such as data volume, packet priority, and channel conditions, enabling dynamic optimization of both speed and resource efficiency.
Solution Approach 2:
The patent implements dynamic transmission decisions where the transmitting device continuously assesses current conditions (data volume, packet priority, channel state) and adjusts transmission behavior accordingly. This dynamic approach allows immediate transmission for critical high-priority packets while maintaining resource efficiency for non-critical packets.
Data Source
AI summary
Apparatus, methods, and computer-readable media for facilitating prioritizing PDCP retransmission and/or control information in dual connectivity scenarios are disclosed herein. An example method for wireless communication at a first network node includes receiving PDUs for transmitting to a second network node while operating in a dual connectivity mode associated with a first RLC leg and at least a second RLC leg, the PDUs associated with at least one of control information or retransmission data. The example method also includes transmitting first scheduling information via the first RLC leg and transmitting second scheduling information via the second RLC leg based on the PDUs being associated with at least one of the control information or the retransmission data. The example first network node may include a UE or a base station.