Packet Duplication Control Across RLC and PDCP Entities
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently providing various services through packet duplication transmission, particularly in 5G communication systems, which are being developed for IoT applications, due to the complexity of managing multiple radio link control entities and packet data convergence protocols.
Innovation Solution
A method and apparatus are introduced to manage packet duplication transmission by configuring and controlling radio link control entities and packet data convergence protocol entities using radio resource control messages, allowing for efficient activation and deactivation of these entities to optimize packet transmission paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If packet duplication transmission is implemented to improve reliability, then service reliability is enhanced, but system complexity increases due to multiple RLC and PDCP entities
Solution Approach 1:
The patent segments the packet transmission function by creating multiple RLC entities (first RLC entity and second RLC entity) and multiple PDCP entities (first PDCP entity and second PDCP entity). Each entity handles specific packet duplication tasks, allowing the system to achieve high reliability through distributed functionality while managing complexity through modular organization of transmission responsibilities
Solution Approach 2:
The patent implements packet duplication by creating duplicate copies of packets through multiple PDCP entities that generate identical packet copies. These duplicated packets are then transmitted through different RLC entities over separate logical channels, ensuring reliability through redundancy while maintaining manageable system complexity through systematic copying mechanisms
2Reliability
If multiple RLC entities are configured for packet duplication, then transmission reliability improves, but control message overhead increases
Solution Approach 1:
The patent merges the configuration of multiple RLC entities and PDCP entities into a single RRC reconfiguration message. Instead of sending separate configuration messages for each entity, the system combines all configuration parameters (logical channel mappings, entity activations, duplication settings) into one comprehensive message, reducing control overhead while maintaining full transmission reliability functionality
Solution Approach 2:
The RRC reconfiguration message is designed with universal functionality to handle multiple configuration tasks simultaneously. It can configure both first and second RLC entities, activate or deactivate multiple entities, and set up PDCP duplication parameters all in one message structure, thereby reducing the quantity of control messages needed while supporting complex packet duplication scenarios
3Productivity
If dynamic activation and deactivation of RLC entities is implemented, then transmission efficiency improves, but control complexity increases
Solution Approach 1:
The patent implements dynamic activation and deactivation of RLC entities through MAC control elements that can change the operational state of first and second RLC entities in real-time. This allows the system to adapt transmission efficiency by activating only the necessary entities based on current channel conditions and traffic requirements, while managing control complexity through standardized MAC CE structures that simplify the dynamic control process
Data Source
AI summary
A communication method performed by a terminal communicating in a wireless communication system by using a plurality of radio link control (RLC) entities is provided. The method includes receiving, from a base station, a radio resource control (RRC) message for configuring packet duplication for a radio bearer, configuring at least one RLC entity corresponding to the radio bearer based on the RRC message, and when packet data convergence protocol (PDCP) configuration information is included in the RRC message, configuring a PDCP entity corresponding to the radio bearer based on the PDCP configuration information.