Sidelink Resource Allocation Time Gap Indication
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Solution Overview
Problem
Current wireless communication systems, particularly in Evolved Universal Terrestrial Radio Access Networks (E-UTRAN) and next-generation 5G networks, face challenges in efficiently managing time gaps for device-to-device communication, especially in sidelink resource allocation for NR V2X communications, which affects data throughput and reliability in providing voice over IP and multimedia services.
Innovation Solution
The proposed method involves a UE-centric approach for determining and indicating time gaps in sidelink resource allocation, using SCI format 1 and DCI format 5A to configure PSSCH and PSCCH transmissions, allowing for autonomous resource selection and retransmission timing within configured sidelink resource pools, enhancing reliability and data throughput in NR V2X communications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional mobile voice communication networks are used, then basic voice communication is maintained, but data throughput is insufficient for large amounts of data communication
Solution Approach 1:
The patent implements dynamic time gap adjustment between downlink and uplink transmissions, allowing the system to adaptively optimize resource allocation based on varying data throughput requirements while maintaining communication reliability through flexible parameter configuration
Solution Approach 2:
The patent introduces configurable time gap parameters (e.g., gapOffset, gapLength) that can be dynamically adjusted to optimize both data throughput and reliability, enabling the system to transition from traditional voice-oriented parameters to data-optimized parameters
2Productivity
If sidelink resource allocation is optimized for data throughput, then NR V2X communication performance improves, but time gap management complexity increases
Solution Approach 1:
The patent pre-configures time gap parameters and resource allocation patterns before actual sidelink communication occurs, allowing UEs to autonomously determine optimal time gaps without real-time complex calculations, thus reducing operational complexity while maintaining high data throughput
Solution Approach 2:
The patent enables UEs to autonomously select and configure their own time gap parameters based on pre-defined rules and conditions, reducing the need for complex network-controlled resource management while optimizing data throughput for V2X applications
3Speed
If retransmission timing is optimized for lower latency, then communication speed improves, but resource allocation reliability decreases
Solution Approach 1:
The patent implements dynamic retransmission timing adjustment where the time gap for retransmissions is adaptively determined based on channel conditions and data priority, enabling low latency for urgent V2X communications while maintaining resource allocation reliability through configurable parameters
Solution Approach 2:
The patent introduces configurable parameters for retransmission timing (e.g., retransmissionTimeOffset, maxRetransmissionGap) that allow the system to optimize between speed and reliability by adjusting these parameters based on service requirements
Data Source
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AI summary
A method and apparatus are disclosed from the perspective of a first User Equipment, UE. In one embodiment, the method includes the first UE being configured or pre-configured with a sidelink resource pool for sidelink transmission (2005). The method also includes the first UE being triggered to select resources for a Transport Block, TB, (2010). The method further includes the first UE selecting a first resource for transmission of the TB (2015). In addition, the method includes the first UE selecting a second resource for Hybrid Automatic Repeat Request-Acknowledgement, HARQ-ACK, based retransmission of the TB, wherein the second resource is later than the first resource, and a time gap between the first resource and the second resource is larger than or equal to a first time duration. Furthermore, the method includes the first UE transmitting a Sidelink Control Information, SCI, and the TB on the first resource in a slot to a second UE, wherein the SCI indicates the first resource and the second resource (2020).