Access Stratum Control for PDCP Duplication in V2X
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Solution Overview
Problem
The existing wireless communication systems face challenges in balancing latency and reliability, particularly in implementing packet data control protocol (PDCP) duplication and release 15 features, which can lead to conflicts and packet loss due to incompatibilities between release 14 and release 15 protocols in vehicle-to-everything (V2X) communications.
Innovation Solution
The proposed user equipment and method control the transmission by implementing an access stratum (AS) layer that receives indications for PDCP duplication and release 15 feature usage, allowing for selective use of PDCP duplication and release 15 features based on proximity-based services per packet reliability (PPPR) and release version indications, thereby overriding conflicting combinations to ensure compatibility and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PDCP duplication is performed to increase reliability and decrease latency, then reliability and speed are improved, but conflicts arise with release 15 feature incompatibilities in V2X communications
Solution Approach 1:
The system dynamically selects between release 14 and release 15 transmission modes based on the second indication parameter, allowing flexible adaptation between different protocol versions. The AS layer can switch between legacy PDCP duplication (release 14) and new PDCP duplication with release 15 features, optimizing for both reliability and compatibility depending on network conditions and UE capabilities.
Solution Approach 2:
The invention introduces a second indication parameter that controls the release version compatibility setting. By changing this parameter, the system can switch between release 14 compatible mode and release 15 feature mode, thereby resolving conflicts between PDCP duplication reliability requirements and protocol compatibility requirements through parameter-based configuration.
2Productivity
If release 15 features are used to improve transmission capabilities, then productivity is improved, but conflicts with release 14 compatibility cause packet loss
Solution Approach 1:
The system dynamically adapts its transmission mode based on the second indication parameter, switching between release 14 compatible transmission and release 15 feature transmission. This dynamic selection ensures that the system uses advanced release 15 features for improved productivity when compatible, while falling back to release 14 modes when compatibility is required to prevent packet loss.
Solution Approach 2:
The second indication parameter acts as an intermediary control mechanism that mediates between release 14 compatibility requirements and release 15 feature utilization. By controlling this parameter, the system can harmonize the coexistence of legacy and advanced features, preventing conflicts that would cause packet loss while enabling productivity improvements where applicable.
3Adaptability or versatility
If PDCP duplication is controlled based on first indication but release 15 features are restricted by second indication, then protocol compatibility is improved, but the ability to optimize transmission is reduced
Solution Approach 1:
The system employs dynamic control through the second indication parameter to enable or disable release 15 features based on compatibility requirements. When the second indication allows release 15 features, the system can optimize transmission using advanced capabilities. When compatibility is prioritized, the system dynamically switches to release 14 modes, thus maintaining adaptability while preserving optimization capability when needed.
Solution Approach 2:
By changing the second indication parameter, the system can switch between different operational modes that balance compatibility and optimization. This parameter-based control allows the system to maintain protocol compatibility when required while preserving the ability to optimize transmission performance when the network and UE support release 15 features.
Data Source
AI summary
A user equipment and a method for controlling transmission of same in a wireless communication system are provided. The user equipment is configured to implement an access stratum (AS) layer. The method includes receiving, from an upper layer to the AS layer, a first indication and a second indication for a packet, wherein the first indication is configured to indicate whether to perform a packet data control protocol (PDCP) duplication, and the second indication is configured to indicate whether to use a release 15 feature and controlling the AS layer not to perform the PDCP duplication and controlling the AS layer not to use the release 15 feature when the first indication indicates to perform the PDCP duplication and the second indication indicates not to use the release 15 feature.