Packet Duplication Transmission Synchronization in 5G Uplink
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Solution Overview
Problem
In next-generation mobile communication systems, packet duplication transmission is used to reduce delay and ensure reliability, but it leads to wastage of transmission resources and unnecessary data processing due to duplicate data transmission.
Innovation Solution
The proposed method involves efficient packet duplication processing in a transmitter to prevent resource wastage and improve data rate by optimizing packet duplication transmission in both uplink and downlink, using two-step data processing procedures and synchronization methods to align transmission timing between RLC entities, thereby reducing duplicate data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If packet duplication transmission is implemented to reduce delay and ensure reliability, then transmission reliability is improved, but transmission resources are wasted
Solution Approach 1:
The patent changes the transmission parameters by implementing selective packet duplication, where not all packets are duplicated. The PDCP entity determines which packets to duplicate based on packet characteristics, channel conditions, or QoS requirements, thereby reducing resource wastage while maintaining reliability for critical packets.
Solution Approach 2:
Instead of duplicating all packets (excessive action), the patent applies partial duplication only to specific packets that require enhanced reliability. This selective approach avoids the resource overhead of universal duplication while still providing reliability guarantees where needed.
2Loss of time
If packet duplication transmission is implemented to reduce delay, then transmission delay is reduced, but data processing complexity increases
Solution Approach 1:
The patent segments the data processing by separating duplicated packets from non-duplicated packets at the PDCP entity. The receiver processes packets based on their duplication status, with simplified logic for non-duplicated packets and enhanced but isolated processing for duplicated packets, thereby managing overall complexity.
Solution Approach 2:
The PDCP entity acts as an intermediary that manages packet duplication and provides clear indication information to the RLC entity. This intermediary layer simplifies the overall system by centralizing the duplication management logic and providing a clear interface between the duplication decision and the transmission execution.
3Reliability
If synchronous packet duplication is performed to improve reliability, then transmission reliability is improved, but synchronization overhead increases
Solution Approach 1:
The patent implements a feedback mechanism where the receiver sends acknowledgment information about received packets to the transmitter. Based on this feedback, the transmitter determines whether to continue, stop, or adjust packet duplication, thereby achieving reliable transmission with adaptive synchronization overhead rather than fixed synchronous overhead.
Solution Approach 2:
The packet duplication strategy is made dynamic rather than static. The PDCP entity can activate or deactivate duplication for different packets based on real-time conditions, and the receiver adapts its processing based on received indication information. This dynamic approach reduces synchronization overhead compared to rigid synchronous duplication.
Data Source
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AI summary
The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. According to the embodiment of the disclosure, a method of a terminal in a wireless communication system and an apparatus therefor are provided. The method includes receiving a configuration for packet duplication transmission from a base station, transmitting the same packet to the base station through different logical channels according to the configuration, and based on predetermined conditions being satisfied, discarding the previously transmitted packet and synchronizing a packet duplication transmission time.