Sidelink Start Points for Unlicensed Spectrum Blind Decoding
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Solution Overview
Problem
In sidelink communication in unlicensed spectrum, the complexity of blind detecting potential sidelink transmissions is high due to fixed time domain resources in licensed spectrum, making efficient transmission challenging.
Innovation Solution
Determining and using multiple sets of start points in the time domain for sidelink transmission, allowing for flexible resource allocation and alignment with legacy transmission schemes, which facilitates blind decoding in unlicensed bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple potential sidelink transmission resources are monitored in unlicensed spectrum, then reception reliability is improved, but detection complexity increases
Solution Approach 1:
The patent segments the time domain resources into multiple discrete start points within a slot, allowing the receiver to monitor only specific segmented resources rather than all possible resources. This segmentation reduces the number of blind detection attempts while ensuring reliable reception by covering all potential transmission start positions.
Solution Approach 2:
The patent establishes predetermined start point patterns and resource allocation rules before actual transmission occurs. Both transmitter and receiver agree on these patterns in advance, allowing the receiver to pre-calculate expected transmission positions and reduce real-time detection complexity while maintaining reliable reception.
2Reliability
If fixed time domain resources are used for sidelink transmission, then transmission reliability is improved, but resource flexibility deteriorates
Solution Approach 1:
The patent introduces dynamic resource allocation within a structured framework. While maintaining fixed slot boundaries for reliability, the actual transmission start points can be dynamically selected from multiple predefined positions within each slot based on channel conditions and traffic requirements, providing adaptability without sacrificing transmission reliability.
Solution Approach 2:
The patent changes the parameter of start symbol position within a slot to provide resource flexibility. By allowing transmissions to start at different symbol positions (e.g., symbol 0, 2, or 4) within the same slot structure, the system adapts to varying channel conditions and interference patterns while maintaining the reliable fixed slot-based resource allocation framework.
Data Source
AI summary
Embodiments of the present disclosure relate to methods, devices and computer readable media for communications. A method comprises determining, at a first terminal device, at least one set of start points in time domain for sidelink transmission. Each of the at least one set comprises one or more start points. The method also comprises transmitting the sidelink transmission on at least one resource starting from one start point in the at least one set.