PDCP Duplication Mode Switching for Wireless Reliability

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Solution Overview

Problem

In wireless communication systems, base stations face challenges in efficiently managing limited radio resources to reduce latency and improve data transmission, particularly in applications sensitive to delay and latency, such as those requiring high data rates and massive machine-type communications.

Innovation Solution

The method involves configuring multiple Radio Link Control (RLC) entities with a Packet Data Convergence Protocol (PDCP) entity in user equipment to switch between carrier aggregation and dual connectivity duplication modes dynamically, allowing for efficient data transmission by altering the duplication mode based on network commands and radio link conditions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If multiple RLC entities are configured with PDCP entity for duplication modes, then data transmission reliability is improved, but device complexity increases

Engineering Contradiction:

Improvedata transmission reliabilityVSAvoiddevice complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent segments the data transmission path by configuring multiple RLC entities (first RLC entity and second RLC entity) with the PDCP entity, enabling parallel duplication modes (carrier aggregation duplication mode and dual connectivity duplication mode). This segmentation allows data units to be transmitted through multiple independent paths, improving reliability while managing complexity through structured organization of transmission paths

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements dynamic switching between different duplication modes by receiving duplication mode change commands from the network. The UE can dynamically transition between carrier aggregation duplication mode and dual connectivity duplication mode based on radio conditions and network requirements, allowing the system to adapt complexity levels to actual transmission needs rather than maintaining fixed high complexity

Inventive Principle:

Principle #15Dynamics

2Adaptability or versatility

If duplication mode is changed dynamically based on network commands, then adaptability to radio conditions is improved, but processing time and complexity increase

Engineering Contradiction:

Improveadaptability to radio conditionsVSAvoidprocessing time

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The patent performs preliminary configuration by setting up multiple RLC entities and establishing both carrier aggregation and dual connectivity duplication modes in advance. When radio conditions change, the UE can immediately switch between pre-configured modes without time-consuming setup procedures, reducing processing time while maintaining high adaptability to changing conditions

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system implements feedback mechanisms where the network monitors radio link conditions and sends duplication mode change commands to the UE based on observed channel quality. This closed-loop feedback allows the system to adapt to changing conditions efficiently, switching modes based on actual performance rather than theoretical optimizations

Inventive Principle:

Principle #23Feedback

3Adaptability or versatility

If carrier aggregation and dual connectivity modes are supported, then versatility of transmission paths is improved, but system complexity increases

Engineering Contradiction:

Improveversatility of transmission pathsVSAvoidsystem complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The PDCP entity is designed with multi-functionality to support both carrier aggregation duplication mode and dual connectivity duplication mode through a unified architecture. The same PDCP entity can operate with different RLC entity configurations, eliminating the need for separate dedicated structures for each mode and reducing overall system complexity while maintaining versatility

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent merges the functionality of multiple transmission paths by configuring multiple RLC entities to work together with a single PDCP entity. The first and second RLC entities are both connected to the same PDCP entity, allowing unified management of carrier aggregation and dual connectivity paths, reducing complexity through consolidation rather than multiplication of separate processing chains

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS11051309B2Method for managing duplication modes by user equipment in wireless communication system and apparatus therefor

Publication Date: 2021.06.29 LG ELECTRONICS INC

AI summary

A method for processing a data unit by a Packet Data Convergence Protocol (PDCP) entity of a user equipment includes configuring three or more Radio Link Control (RLC) entities with the PDCP entity; activating a first duplication mode for first and second RLC entities among the three or more RLC entities; providing the data unit to the first and second RLC entities by duplicating the data unit; receiving a duplication mode change command from a network; changing the first duplication mode to a second duplication mode for the first RLC entity and a third RLC entity; and providing the data unit to the first and third RLC entities by duplicating the data unit, wherein the first and second RLC entities is configured with a first Media Access Control (MAC) entity, and wherein the third RLC entity is configured with a second MAC entity.