Dynamic Packet Duplication for 5G URLLC Resource Efficiency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing packet transmission methods in wireless communication systems, particularly in 5G and beyond, face challenges in efficiently utilizing radio resources due to the degradation of throughput caused by packet duplication schemes, which are necessary for ensuring high reliability in ultra-reliable low latency communications (URLLC) but can waste radio resources.
Innovation Solution
A method and apparatus that activate packet duplication operations using periodic resources allocated in both a first cell and a second cell only when necessary, based on the success of uplink transmissions, to ensure survival time (ST-state) and maintain higher reliability without constant resource duplication, thereby optimizing radio resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If packet duplication scheme is activated to ensure high reliability in URLLC, then reliability is improved, but radio resource usage deteriorates due to resource waste
Solution Approach 1:
The packet duplication scheme is made dynamic by activating it only when packet loss is detected in the uplink transmission, rather than maintaining it continuously. The base station monitors transmission success and triggers duplication selectively, allowing the system to adapt between single transmission (normal state) and duplicated transmission (reliability-critical state), thus resolving the contradiction between reliability and resource efficiency
Solution Approach 2:
The system employs periodic monitoring of uplink transmission success by the base station, and activates packet duplication in response to detected failures. This periodic check-and-react mechanism ensures reliability only when necessary, preventing continuous resource consumption while maintaining the capability to switch to high-reliability mode when packet loss occurs
2Reliability
If packet duplication is constantly activated to maintain high reliability, then reliability is improved, but throughput deteriorates due to resource waste
Solution Approach 1:
The system dynamically adjusts the transmission mode based on actual channel conditions and transmission success. When packets are transmitted successfully, the system operates in normal mode with higher throughput. When packet loss is detected, it switches to packet duplication mode to ensure reliability, thus optimizing the trade-off between throughput and reliability in real-time
Solution Approach 2:
The system changes the transmission parameter (packet duplication status) based on transmission success feedback. By monitoring whether uplink packets are successfully received and changing the duplication parameter accordingly, the system maintains high throughput during normal operation while ensuring reliability activation only when necessary, preventing continuous throughput degradation
Data Source
AI summary
The present disclosure relates to a 5th generation (5G) or 6th generation (6G) communication system for supporting a higher data transmission rate. According to to an embodiment of the present disclosure, a method performed by a user equipment (UE) in a wireless communication system includes: receiving, from a base station, information on a configured grant allocating periodic resources for uplink transmissions; activating a packet duplication operation in case that an uplink transmission based on a resource allocated by the configured grant in a first cell is not successful; and performing the packet duplication operation based on a next resource allocated by the configured grant in the first cell and a second cell.