Signal Forwarding Scheme Selection for Adaptive Decoding Levels
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Solution Overview
Problem
Conventional signal forwarding devices in wireless communication systems typically operate using a single forwarding scheme, which is not adaptive to changing channel conditions due to mobility and interference, leading to suboptimal performance.
Innovation Solution
The signal forwarding device is equipped with the capability to select from multiple forwarding schemes (AF, PDF, DF) based on channel characteristics, determined by the device or the base station, to optimize signal processing and decoding levels in response to changing conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single fixed forwarding scheme is used, then device complexity is reduced, but adaptability to changing channel conditions deteriorates
Solution Approach 1:
The patent implements dynamic forwarding scheme selection where the signal forwarding device transitions from a static single scheme to multiple selectable schemes (AF, PDF, DF) based on real-time channel conditions. The device dynamically switches between amplify-and-forward, partial-decode-and-forward, and decode-and-forward schemes according to channel quality indicators, thereby achieving adaptability without permanent structural complexity.
Solution Approach 2:
The patent changes the operational parameter of the forwarding device from fixed scheme to variable scheme selection. By introducing channel quality thresholds and corresponding scheme selection criteria, the system adjusts the forwarding approach based on measured channel conditions, enabling adaptability through parameter-based decision making rather than structural modification.
2Reliability
If complete decoding is performed, then communication reliability is improved, but latency increases
Solution Approach 1:
The patent applies partial decoding (PDF) as an intermediate solution between full amplification and complete decoding. In partial-decode-and-forward mode, the device performs only partial signal processing to achieve sufficient reliability for certain channel conditions, avoiding the full latency overhead of complete decoding while still improving upon simple amplification. This selective partial action optimizes the trade-off between reliability and latency.
Solution Approach 2:
The system dynamically selects the decoding level (AF, PDF, or DF) based on real-time channel quality assessment. When channel conditions are good, less processing is applied; when conditions deteriorate, more processing is applied. This dynamic adjustment allows the system to maintain communication reliability while minimizing latency under varying conditions.
3Productivity
If signal processing is increased at the forwarding device, then communication efficiency is improved, but device complexity increases
Solution Approach 1:
The patent designs the forwarding device with multi-functionality to perform three distinct forwarding modes (AF, PDF, DF) using a unified architecture. The device incorporates universal signal processing capabilities that can operate in different modes depending on channel conditions, rather than requiring separate dedicated hardware for each function. This universal design achieves communication efficiency across varying conditions without proportionally increasing complexity.
Data Source
AI summary
In response to an instruction received from a base station, a signal forwarding device applies a signal forwarding scheme selected from a plurality of signaling forwarding schemes by a scheduler. The signal forwarding scheme may be applied by the signal forwarding device to forward signals from the base station to a user equipment (UE) device and/or from the UE device to the base station. The scheduler selects the signal forwarding scheme based on channel characteristics of the channel between the signal forwarding device and the UE device and/or the channel between the signal forwarding device and the base station. Although at least some of the channel characteristics are determined by the base station, at least some of the channel characteristics can be determined by the signal forwarding device in some situations.