PDCP Duplication Mode Selection for 5G Reliability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In 5G systems, existing PDCP duplication methods, such as CA and DC duplication, often fail to meet reliability requirements due to dynamic changes in radio channels, leading to inconsistent transmission quality.
Innovation Solution
A method for selecting among multiple transmission modes, including duplicating data packets at the PDCP layer and transmitting them through various network devices and logical channels, to ensure reliability by adjusting the duplication and transmission strategies based on indication information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If CA duplication or DC duplication at PDCP is configured for one radio bearer, then data transmission reliability is improved through duplication, but the system cannot adapt to dynamic radio channel changes to meet varying reliability requirements
Solution Approach 1:
The patent implements dynamic transmission mode selection that allows the system to switch between different duplication configurations (CA duplication, DC duplication, or no duplication) based on real-time radio channel conditions and service requirements. This dynamic adaptation resolves the contradiction by making the reliability mechanism flexible rather than fixed, enabling the system to optimize between reliability and adaptability.
Solution Approach 2:
The patent changes the parameter of duplication configuration from a static setting to a dynamically adjustable one. By introducing transmission mode indication information that can switch between multiple configurations, the system can modify duplication parameters according to varying radio channel conditions, thereby simultaneously achieving reliability improvement and adaptability to dynamic changes.
2Ease of manufacture
If fixed duplication modes (CA or DC) are used, then implementation is simple, but transmission quality becomes inconsistent under varying radio conditions
Solution Approach 1:
The patent segments the duplication function into multiple independent transmission modes (CA duplication mode, DC duplication mode, and no duplication mode). Each mode can be independently selected based on conditions, allowing the system to maintain implementation simplicity through modular design while achieving consistent transmission quality through conditional selection of the appropriate mode.
Data Source
AI summary
A transmission mode selection method and a device are provided. The method includes: determining first indication information, where the first indication information is used to indicate a changed transmission mode and/or indicate to change a transmission mode; and sending the first indication information to a terminal device. There may be a plurality of transmission modes for transmitting a data packet duplicated at a PDCP layer, in other words, there may be a plurality of modes for PDCP duplication. A transmission mode can be selected by using the first indication information. For example, when reliability of a mode for PDCP duplication is not high, another transmission mode can be selected by using the first indication information. In this way, a reliability requirement of a service is met as much as possible, thereby improving transmission quality of the service.