Dynamic RLC Entity Selection for Low-Latency 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 packet data convergence protocol (PDCP) duplication, leading to poor network performance due to static signaling.
Innovation Solution
Implementing a control message, such as a media access control (MAC) control element (CE), for dynamic selection of RLC entities, which includes bitmaps and configuration information to facilitate efficient RLC entity selection for uplink PDCP duplication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If static signaling is used to update RLC entity information, 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 switching between configured RLC entities based on channel conditions. The network can dynamically indicate which RLC entity to use for uplink transmissions, transforming the static configuration into a dynamic adaptation mechanism that reduces latency without requiring complete reconfiguration signaling.
Solution Approach 2:
The patent segments the RLC entity configuration by pre-configuring multiple RLC entities with different parameters (acknowledged mode, unacknowledged mode, transparent mode) and then using bitmap indicators in MAC CEs to select specific segments (entities) for active use. This allows selective activation of needed RLC entities without signaling the entire configuration set.
2Reliability
If multiple RLC entities are configured for PDCP duplication, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent enables dynamic selection among multiple pre-configured RLC entities using compact MAC control elements. Instead of managing multiple active RLC entities simultaneously, the system dynamically switches between them based on channel conditions and network requirements, maintaining reliability through redundancy while simplifying active entity management.
Solution Approach 2:
The patent uses bitmap copying indicators in MAC CEs that reference pre-configured RLC entity sets. The network can indicate which copied configurations to activate without transmitting the full configuration data again, reducing complexity while maintaining the ability to switch between multiple RLC entity configurations for reliability.
3Adaptability or versatility
If dynamic RLC entity selection is implemented, then adaptability to channel conditions is improved, but control message complexity increases
Solution Approach 1:
The patent segments the control information into compact MAC control elements with bitmap indicators that reference pre-configured RLC entity parameters. This segmentation allows dynamic adaptation to channel conditions while keeping individual control messages simple and efficient, as they only need to indicate which pre-configured entities to use rather than carry full configuration data.
Solution Approach 2:
The patent performs preliminary configuration of multiple RLC entities with different parameters before dynamic selection is needed. This preliminary action allows the system to adapt quickly to changing channel conditions using simple selection indicators rather than complex real-time configuration messages, reducing control message complexity while maintaining high adaptability.
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.