Application Data Unit FEC Adaptation Across PDCP, RLC, and HARQ
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently adapting forward error correction (FEC) techniques for application data units (ADUs) to optimize packet transmission characteristics, particularly in the context of packet data convergence protocol (PDCP), radio link control (RLC), and physical layer hybrid automatic repeat request (HARQ), which can impact data integrity and reliability.
Innovation Solution
The method involves obtaining FEC information associated with ADUs and adjusting PDCP, RLC, or physical layer HARQ characteristics to enhance the transmission of packets, thereby applying FEC based on these parameters to improve data transmission quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If FEC is applied to ADUs with fixed parameters, then error correction capability is provided, but data transmission efficiency and adaptability to varying channel conditions deteriorate
Solution Approach 1:
The patent implements dynamic FEC adaptation by allowing the FEC scheme, code rate, and block length to be adjusted based on channel conditions, QoS requirements, and traffic patterns. The network can dynamically select between different FEC schemes (convolutional, turbo, LDPC) and adjust parameters in real-time, transforming the static FEC system into a dynamic one that adapts to varying transmission environments.
Solution Approach 2:
The patent changes multiple FEC parameters including code rate, block length, and FEC scheme type based on channel quality indicators, signal-to-noise ratio, and packet error rates. The system adjusts these parameters dynamically to optimize the balance between error correction capability and transmission efficiency, applying stronger FEC only when channel conditions deteriorate.
2Productivity
If FEC parameters are adjusted dynamically based on channel conditions, then transmission efficiency improves, but system complexity increases
Solution Approach 1:
The patent implements feedback mechanisms where the receiving end monitors packet error rates, signal quality, and decoding success, then sends this information back to the transmitting end. The transmitter uses this feedback to automatically adjust FEC parameters without requiring complex manual configuration or higher-layer protocol intervention, reducing overall system complexity while maintaining adaptability.
Solution Approach 2:
The FEC adaptation system performs self-configuration and self-optimization based on automatically monitored channel conditions and transmission performance. The system autonomously selects appropriate FEC schemes and parameters without external control, reducing the complexity burden on network operators and higher-layer protocols while maintaining high transmission efficiency.
3Reliability
If strong FEC protection is applied to all packets, then data integrity is improved, but transmission overhead and latency increase
Solution Approach 1:
The patent applies different levels of FEC protection to different packets or data flows based on their specific requirements. Critical packets requiring high reliability receive stronger FEC protection with lower code rates, while less critical packets use lighter protection or no FEC at all. This localized quality approach ensures data integrity for important traffic without unnecessarily increasing latency for all transmissions.
Solution Approach 2:
The patent applies FEC protection selectively rather than universally, using partial action by applying strong FEC only to packets where it is truly needed based on channel conditions and QoS requirements. The system avoids excessive FEC application that would waste resources and increase latency, optimizing the balance between protection level and transmission efficiency on a per-packet or per-flow basis.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may obtain forward error correction (FEC) information associated with an application data unit (ADU). The UE may adjust a packet data convergence protocol (PDCP) characteristic, a radio link control (RLC) characteristic, or a physical layer hybrid automatic repeat request (HARQ) characteristic for transmitting a packet associated with the ADU based at least in part on the FEC information. Numerous other aspects are described.