Dynamic RLC Entity Selection via MAC Control Elements for PDCP Duplication
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Solution Overview
Problem
Current wireless communication systems face excessive latency in updating information about configured radio link control (RLC) entities for PDCP duplication, leading to poor network performance due to static signaling in RLC entity selection.
Innovation Solution
Implementing a control message, such as a media access control (MAC) control element (CE), for dynamic selection of RLC entities, which includes configuration information and bitmaps for signaling parameters, enabling adaptive RLC entity selection based on changing channel conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If static signaling is used for RLC entity selection, then device complexity is reduced, but latency increases and network performance deteriorates
Solution Approach 1:
The patent implements dynamic RLC entity selection through MAC control elements that allow real-time updates of RLC entity configurations. The base station can dynamically indicate which RLC entities are active for PDCP duplication based on current channel conditions, transforming the static signaling approach into a dynamic one that adapts to changing network environments, thereby reducing latency without excessive complexity increase
Solution Approach 2:
The patent changes the signaling parameter format by introducing compact MAC control elements with bitmaps that efficiently represent RLC entity selection states. This parameter encoding approach allows dynamic updates with minimal overhead, resolving the contradiction between reducing latency and maintaining acceptable signaling complexity
2Adaptability or versatility
If dynamic RLC entity selection is implemented, then network performance and adaptability improve, but device complexity increases
Solution Approach 1:
The patent segments the control information into separate MAC control elements that can be independently processed. Each MAC CE contains specific information about RLC entity selections, allowing the UE to process only relevant segments rather than handling monolithic complex messages, thus improving adaptability while managing processing complexity
Solution Approach 2:
The patent uses bitmap representations to copy and indicate the state of multiple RLC entities efficiently. Instead of processing individual complex structures for each entity, the system uses compact bit patterns that can be quickly interpreted, enhancing adaptability to channel conditions while minimizing the computational burden on the device
3Reliability
If frequent updates of RLC entity information are performed, then reliability of PDCP duplication improves, but loss of time increases due to signaling overhead
Solution Approach 1:
The patent implements periodic updates of RLC entity information through MAC control elements at optimized intervals. Rather than continuous or overly frequent signaling, the system performs updates at appropriate periods based on channel condition changes, maintaining reliability of PDCP duplication while minimizing unnecessary signaling time overhead
Solution Approach 2:
The system uses feedback mechanisms where the base station monitors channel conditions and triggers RLC entity updates only when necessary. This feedback-driven approach ensures that updates occur reliably when needed while avoiding unnecessary signaling time during stable conditions, resolving the contradiction between reliability and signaling time
Data Source
AI summary
This disclosure provides systems, methods and apparatuses for using a media access control (MAC) control element (CE) for dynamic RLC entities selection. In one aspect, a base station (BS) may generate and transmit the control message to a user equipment (UE) to identify active radio link control (RLC) entities, a primary RLC entity, or other parameters relating to packet data convergence protocol (PDCP) duplication-based communication. In this case, the UE may use the control message to select an RLC entity and may transmit protocol data units (PDUs) to the BS using a data radio bearer (DRB) and the selected RLC entity.