PDCP Duplication Signaling for Reliable Multicast and Broadcast
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently supporting multicast and broadcast services, particularly in terms of packet data convergence protocol (PDCP) enhancements for reliable and low-latency data transmission in diverse applications such as eMBB, URLLC, and mMTC, especially in scenarios involving multiple UEs and varying network conditions.
Innovation Solution
The implementation of enhanced Packet Data Convergence Protocol (PDCP) mechanisms for multicast and broadcast services, including PDCP duplication and activation/deactivation signaling, to optimize data transmission and improve reliability and latency performance in wireless networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PDCP duplication is implemented for multicast and broadcast services, then reliability is improved, but device complexity increases
Solution Approach 1:
The PDCP duplication mechanism is segmented into distinct activation and deactivation phases, with separate signaling paths for control. The duplication is activated only when specific network conditions or service requirements are met, rather than being permanently enabled, thus managing complexity through conditional segmentation of the protocol operation.
Solution Approach 2:
The PDCP duplication capability is made dynamic through activation/deactivation signaling. The system can adaptively enable or disable duplication based on current network conditions, service type (eMBB, URLLC, mMTC), and reliability requirements, allowing the complexity to be adjusted dynamically rather than being statically high.
2Adaptability or versatility
If PDCP activation/deactivation signaling is implemented, then adaptability to varying network conditions is improved, but loss of time increases
Solution Approach 1:
The network pre-configures PDCP duplication parameters and signaling mechanisms during initial connection setup or service configuration. This preliminary configuration ensures that when activation or deactivation is needed, the system can quickly switch states using pre-agreed parameters, reducing the time penalty of adaptability signaling.
Solution Approach 2:
The system implements feedback mechanisms where the network monitors current network conditions and service performance, then triggers activation or deactivation of PDCP duplication accordingly. This feedback-driven approach ensures adaptability is exercised only when necessary, minimizing unnecessary signaling time while maintaining responsiveness to actual network conditions.
Data Source
AI summary
A system, method and apparatus for mobile communications including sidelink transmissions is provided. A user equipment (UE) determines based on a partial sensing resource allocation process associated with a first window size, first radio resources for one or more first sidelink transport blocks. The UE transmits the one or more first sidelink transport blocks based on the first radio resources. The UE receives hybrid automatic repeat request (HARQ) feedback based on a first number of number of negative acknowledgements (NACKs) and a second number of positive acknowledgements (ACKs). Based on application of a threshold, the UE determines second radio resources for one or more second sidelink transport blocks. The UE transmits the one or more second sidelink transport blocks based on the second radio resources.