Multi-Carrier Packet Duplication to Avoid HARQ Retransmissions
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in packet transmission reliability and resource utilization when using multi-carrier operations, particularly in scenarios where hybrid automatic repeat request (HARQ) acknowledgments are not received, leading to unnecessary retransmissions and suboptimal resource allocation.
Innovation Solution
Implementing packet duplication operations for wireless communication using multiple carriers, where packets are transmitted on multiple carriers based on configured thresholds for reliability and priority, and feedback is received without performing retransmissions based on HARQ acknowledgments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If packet duplication is performed on multiple carriers with HARQ retransmission, then packet transmission reliability is improved, but resource usage increases due to unnecessary retransmissions
Solution Approach 1:
The patent applies packet duplication by creating copies of the same packet and transmitting them on multiple carriers simultaneously. This copying approach ensures that at least one copy is successfully received, improving reliability while avoiding the need for energy-consuming retransmission procedures when HARQ acknowledgments are not received.
Solution Approach 2:
The patent segments the packet transmission across multiple carriers, dividing the transmission task into parallel segments on different frequency resources. This segmentation allows the system to achieve diversity gain and improve reliability without concentrating all resources on a single transmission attempt that would require retransmission.
2Reliability
If packet duplication is performed on multiple carriers, then packet transmission reliability is improved, but device complexity increases
Solution Approach 1:
The patent merges the packet duplication function with existing multi-carrier transmission capabilities. By integrating packet duplication into the existing carrier aggregation framework and reusing existing HARQ entities, the patent improves reliability while minimizing the increase in device complexity through resource consolidation rather than adding entirely new mechanisms.
3Reliability
If retransmission is performed based on HARQ acknowledgments in multi-carrier operations, then packet transmission reliability is improved, but productivity decreases due to suboptimal resource allocation
Solution Approach 1:
The patent performs preliminary packet duplication and transmits copies on multiple carriers before needing to assess transmission success. This preliminary action on multiple carriers simultaneously eliminates the need for subsequent retransmission procedures, improving both reliability and productivity by avoiding delayed resource allocation decisions based on HARQ feedback.
Data Source
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AI summary
A method for performing wireless communication by a first device, and a device for supporting same are provided. The method may comprise the steps of: obtaining configuration information related to multiple carriers; generating a second packet on the basis of packet duplication for a first packet; transmitting the first packet to a second device on the basis of a first carrier among the multiple carriers; transmitting the second packet to the second device on the basis of a second carrier among the multiple carriers; and receiving, from the second device, at least one of first feedback related to the first packet and second feedback related to the second packet. For example, on the basis that the first feedback or the second feedback is a hybrid automatic repeat request (HARQ) acknowledgement (ACK), retransmission may not be performed.