Autonomous Reference Signal Configuration for Low-Latency Downlink Recovery
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Solution Overview
Problem
There is a need for improved techniques in New Radio (NR) and LTE technology to enhance communication efficiency and reduce latency in wireless networks, particularly in response to downlink communication failures or errors.
Innovation Solution
The method involves configuring user equipment (UE) to transmit autonomous reference signals using pre-defined candidate resources before receiving a future downlink transmission, allowing for rapid signal retransmission without explicit instructions from the base station.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the base station waits for explicit instructions from the UE before transmitting reference signals, then the control signaling is simple, but the latency increases and communication efficiency decreases
Solution Approach 1:
The base station performs preliminary action by proactively transmitting reference signals before receiving explicit instructions from the UE. The base station monitors downlink communication status and autonomously determines when to transmit reference signals, eliminating the need for waiting for UE instructions and thereby reducing latency.
Solution Approach 2:
The base station implements self-service by autonomously monitoring its own downlink communication status and independently deciding when to transmit reference signals without requiring explicit control instructions from the UE. This self-driven approach enables the base station to respond immediately to communication needs.
2Productivity
If the UE transmits reference signals autonomously without base station instructions, then the communication efficiency improves, but the control mechanism becomes more complex
Solution Approach 1:
The UE implements self-service by autonomously monitoring downlink communication status and independently determining when to transmit reference signals. The UE uses its own received downlink control information to trigger reference signal transmission, eliminating the need for separate base station instructions and improving communication efficiency.
Solution Approach 2:
The system implements feedback by having the UE monitor downlink control information and use this feedback to autonomously determine when to transmit reference signals. The downlink control information serves as feedback that triggers the UE's autonomous reference signal transmission, creating a closed-loop control mechanism.
3Reliability
If reference signals are transmitted only after downlink errors are detected, then the error handling is simple, but the retransmission time is delayed
Solution Approach 1:
The base station performs preliminary action by transmitting reference signals before actual downlink data transmission occurs. By monitoring the scheduled downlink transmission and proactively sending reference signals in advance, the system ensures that channel state information is available before retransmission is needed, eliminating delays.
Solution Approach 2:
The system maintains continuity of useful action by continuously monitoring downlink communication status and maintaining ready-state reference signal transmission capability. When downlink errors occur, the reference signals can be immediately transmitted without interruption or delay, ensuring continuous and reliable retransmission operation.
Data Source
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AI summary
Certain aspects of the present disclosure provide techniques for autonomous reference signal transmission configuration. Certain aspects provide a method of receiving a configuration message from the base station, wherein the configuration message comprises an indication of a set of candidate resources for transmitting the reference signal. Certain aspects provide a method of detecting a future downlink transmission from the base station, and other aspects provide a method of transmitting, in response to detecting the future downlink transmission, the reference signal utilizing a first resource of the set of candidate resources prior to receiving the future downlink transmission via a second resource in the set of candidate resources.