Sidelink Resource Indication for Self-Interference Mitigation
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Solution Overview
Problem
In wireless communication systems, especially in sidelink communication, autonomous resource selection by User Equipments (UEs) for sidelink transmissions can lead to self-interference, degrading the reception of simultaneous downlink transmissions due to overlapping time and frequency resources, which existing technologies fail to effectively mitigate.
Innovation Solution
A method where UEs autonomously select resources for sidelink transmissions and inform the base station, allowing the base station to adjust downlink transmissions by receiving resource selection indications and providing multiple configurations of reception parameters associated with priority levels to mitigate self-interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If UEs autonomously select resources for sidelink transmissions, then resource allocation flexibility is improved, but self-interference to downlink reception deteriorates
Solution Approach 1:
The UE reports the selected sidelink resources to the base station, creating a feedback loop that enables the base station to adjust downlink transmissions accordingly. This feedback mechanism allows the system to maintain autonomous resource selection while mitigating self-interference through network coordination.
Solution Approach 2:
The downlink transmission parameters are made dynamic and adjustable based on the reported sidelink resource selections. The base station can modify transmission power, timing, or other parameters in real-time to avoid self-interference, transforming the static downlink transmission into a dynamic adaptive process.
2Productivity
If full-duplex mode is used for simultaneous transmission and reception, then spectral efficiency is improved, but self-interference cancellation difficulty deteriorates
Solution Approach 1:
The base station acts as an intermediary that coordinates between the UE's sidelink transmission and the downlink reception. By reporting selected resources to the base station, the system uses network-level coordination to manage self-interference that would otherwise be difficult to cancel at the UE level.
Solution Approach 2:
The UE reports its intended sidelink resource selections before actually transmitting, allowing the base station to prepare and adjust downlink transmission parameters in advance. This preliminary coordination enables the system to prevent self-interference before it occurs, rather than attempting to cancel it after transmission begins.
3Reliability
If multiple configurations of reception parameters are provided with priority levels, then reception quality under interference is improved, but system complexity deteriorates
Solution Approach 1:
The system provides multiple configurations of reception parameters (such as transmission power, timing offsets, or filtering characteristics) that can be switched based on the priority level of the downlink transmission. This allows the UE to optimize reception quality by selecting appropriate parameters corresponding to the reported priority levels.
Solution Approach 2:
Different priority levels are associated with different reception parameter configurations, allowing the system to apply localized optimization for each transmission type. High-priority transmissions receive one set of parameters while lower-priority transmissions use different parameters, enabling tailored reception quality for different service requirements.
Data Source
AI summary
Aspects of the present disclosure include methods and devices for informing a base station of autonomously selected SL resources to allow the base station to adjust the DL transmission to mitigate the degradation of the reception of a DL transmission due to self-interference that overlaps with a SL transmission. A device may be configured to select resources for a SL transmission and to transmit, in an UL transmission to a base station, an indication of the resources selected for the SL transmission. A base station may be configured to receive, in an UL transmission, an indication of resources selected for a SL transmission from a UE, and to transmit, based on the indication of the resources selected for the SL transmission, at least one DL transmission that overlaps in time with the SL transmission.