PDCP Control PDU Transmission Without Duplication
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Solution Overview
Problem
In next-generation mobile communication systems, existing methods fail to efficiently manage packet duplication in PDCP and RLC entities, leading to increased transmission latency and unnecessary data transmission, particularly when activating or deactivating packet duplication, which affects the processing of control data.
Innovation Solution
A method and apparatus that involve a terminal and base station to identify and handle PDCP control PDUs separately, transmitting them without packet duplication through a primary RLC entity based on specific configurations, optimizing the operation of packet duplication in carrier aggregation or dual connectivity scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If packet duplication is activated for all PDCP PDUs to improve reliability, then transmission reliability is improved, but transmission latency increases and unnecessary data transmission occurs
Solution Approach 1:
The patent applies different quality treatments to different types of PDCP PDUs. Control PDUs are transmitted without duplication through the primary RLC entity, while user data PDUs can be duplicated. This local differentiation ensures that control information is delivered efficiently without unnecessary duplication overhead, while reliability is maintained for user data through selective duplication.
Solution Approach 2:
The patent segments PDCP PDUs into two categories: control PDUs and user data PDUs. This segmentation allows the system to apply different transmission strategies to each type, with control PDUs using a dedicated primary RLC entity for low-latency delivery and user data PDUs using packet duplication for enhanced reliability.
2Reliability
If packet duplication is applied to control PDUs to improve reliability, then transmission reliability is improved, but device complexity and processing overhead increase
Solution Approach 1:
The patent applies different quality treatments to different types of PDCP PDUs. Control PDUs are transmitted without duplication through the primary RLC entity, while user data PDUs can be duplicated. This local differentiation ensures that control information is delivered efficiently without unnecessary duplication overhead, while reliability is maintained for user data through selective duplication.
3Reliability
If packet duplication is activated for all data to prevent loss, then data loss is prevented, but transmission efficiency decreases due to redundant transmissions
Solution Approach 1:
The patent applies different quality treatments to different types of PDCP PDUs. Control PDUs are transmitted without duplication through the primary RLC entity, while user data PDUs can be duplicated. This local differentiation ensures that control information is delivered efficiently without unnecessary duplication overhead, while reliability is maintained for user data through selective duplication.
Solution Approach 2:
Instead of applying packet duplication to all PDCP PDUs, the patent applies it only to user data PDUs while excluding control PDUs. This partial action approach maintains sufficient reliability for control information through the dedicated primary RLC entity while applying duplication only where it provides additional benefit for user data.
Data Source
AI summary
A method by a terminal in a communication system and an apparatus therefor are disclosed. The method includes receiving, from a base station, a radio resource control (RRC) message including a radio link control (RLC) configuration and a packet data convergence protocol (PDCP) configuration associated with a packet duplication, identifying whether a PDCP packet data unit (PDU) is a PDCP control PDU in case that the packet duplication is activated, and transmitting, to the base station, the PDCP control PDU without the packet duplication through a primary RLC entity based on the PDCP configuration in case the PDCP PDU is the PDCP control PDU. The disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates with a technology for internet of things (IoT), and may be applied to intelligent services based on the 5G communication technology and the IoT-related technology.