Sidelink Slot Aggregation With First-Symbol Decoding Support
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently utilizing sidelink transmissions, particularly in scenarios where multiple-access technologies like LTE and NR are deployed, as they do not effectively support decoding and response mechanisms for sidelink communications spanning multiple aggregated slots.
Innovation Solution
Implementing sidelink transmissions that span multiple aggregated slots, where a first symbol in a slot enables decoding by the receiving UE, and allowing for a response based on the transmission across these slots, enhancing communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If sidelink transmissions span multiple aggregated slots, then data transmission rate is improved, but decoding accuracy deteriorates due to variable received powers across slots
Solution Approach 1:
The first symbol of the first slot in the aggregated slots is configured to include redundancy information (such as duplicate information or information different from other symbols) before transmission begins. This preliminary inclusion of redundancy information enables the receiving UE to perform automatic gain control and decoding operations more accurately, thereby resolving the decoding accuracy deterioration caused by variable received powers across multiple slots while maintaining the improved data transmission rate.
2Reliability
If redundancy information is included in the first symbol, then decoding capability is improved, but control overhead increases
Solution Approach 1:
Redundancy information is selectively included only in the first symbol of the first slot among the multiple aggregated slots, rather than repeating redundancy information in every slot or every symbol. This localized approach provides sufficient decoding capability for the receiving UE to handle variable received powers across slots while minimizing control overhead compared to universal redundancy inclusion.
3Measurement precision
If automatic gain control settings are adjusted for variable received powers, then decoding accuracy is improved, but system complexity increases
Solution Approach 1:
The transmitting UE configures the first symbol of the first slot to include redundancy information before transmission, which preliminarily establishes a reference for automatic gain control at the receiving UE. This approach simplifies the automatic gain control process compared to dynamically adjusting settings for each slot, as the receiving UE can use the redundancy information in the first symbol as a stable reference point for gain control across all aggregated slots.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first user equipment (UE) may transmit, to a second UE, a sidelink transmission that spans multiple aggregated slots, wherein a first symbol in a slot of the sidelink transmission enables a decoding of the sidelink transmission by the second UE. The first UE may receive, from the second UE, a response based at least in part on the sidelink transmission that spans the multiple aggregated slots. Numerous other aspects are described.