Relay Device Latency Control via Channel Delay Feedback
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Solution Overview
Problem
Existing wireless communication systems face challenges in managing relay devices to avoid introducing significant latency, which can lead to inter-symbol interference and degrade communication links.
Innovation Solution
The method involves reporting intrinsic channel delay of relay devices to user equipment, allowing it to request adjustments in relay operation based on channel delay spread and intrinsic channel delay, thereby optimizing relay performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If relay devices are used to extend signal coverage, then coverage area is improved, but latency increases causing inter-symbol interference
Solution Approach 1:
The patent implements a feedback mechanism where the receiving device measures channel delay spread and sends control signals back to the relay device. The relay device adjusts its operation based on this feedback to maintain low latency while providing coverage extension. This closed-loop control enables the system to achieve both extended coverage and acceptable latency by dynamically adapting relay behavior to current channel conditions.
Solution Approach 2:
The patent makes the relay device operation dynamic by enabling it to switch between different operational states (active/inactive) based on measured channel conditions. The relay device can dynamically adjust its signal relaying behavior in response to changing latency requirements, transforming a static relay into an adaptive component that optimizes the trade-off between coverage extension and latency introduction.
2Reliability
If relay devices operate continuously to maintain coverage, then signal availability is improved, but inter-symbol interference increases
Solution Approach 1:
Instead of continuous operation, the patent implements periodic assessment of channel conditions with selective relay activation. The receiving device periodically measures channel delay spread and only activates the relay when conditions warrant it. This periodic control mechanism ensures signal availability when needed while avoiding continuous operation that would introduce harmful inter-symbol interference during periods of acceptable direct channel quality.
Solution Approach 2:
The patent extracts the relay function from a always-on component to a conditionally activated component. By separating the relay operation from continuous operation, the system can remove the harmful inter-symbol interference effect by deactivating the relay when direct communication paths are sufficient, while maintaining signal availability when the relay is needed based on measured channel conditions.
3Ease of manufacture
If relay devices are deployed without channel delay information, then deployment simplicity is improved, but communication performance deteriorates
Solution Approach 1:
The patent enables the communication system to self-configure by having the receiving device autonomously measure channel delay spread and generate appropriate control signals for the relay device. No manual configuration or complex pre-planning of relay parameters is needed - the system automatically adapts to the actual channel conditions, maintaining deployment simplicity while significantly improving communication performance through data-driven relay control.
Solution Approach 2:
The patent performs preliminary measurement of channel delay spread before making relay operation decisions. By预先 measuring and understanding the channel characteristics, the system can proactively adjust relay operations to prevent performance degradation rather than reacting to problems after they occur. This preliminary assessment enables informed control decisions that optimize communication performance while maintaining simple deployment.
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for wireless communication by a user equipment, including in one example: receiving a relay characteristic report, wherein the relay characteristic report indicates an intrinsic channel delay of a relay device; determining a channel delay spread of the channel; and transmitting an indication to affect relay device operation based at least in part on the channel delay spread and the intrinsic channel delay of the relay device.