Sidelink Reception With Multiple Slots For V2X Coverage
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Solution Overview
Problem
The existing 5G NR V2X communication systems face a challenge in achieving coverage beyond 1000 meters due to the limited Cyclic Prefix (CP) lengths, which cannot accommodate the timing difference of up to 6.66 μs between synchronization signal reception and information reception.
Innovation Solution
The proposed solution involves a method where a receiving device receives information from a transmitting device in multiple slots, with each slot starting at a different time, allowing for a time interval between the receptions to accommodate the timing difference. This approach enables the coverage requirement for NR V2X communications to be met.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single Cyclic Prefix (CP) is used to accommodate timing difference, then timing synchronization is simplified, but the coverage requirement of more than 1000 meters cannot be fulfilled because supported CP lengths are all shorter than 6.66 μs
Solution Approach 1:
The patent divides the reception process into multiple slots (first slot and second slot) with different starting times. The first slot uses a first CP length while the second slot uses a second CP length, allowing each slot to handle different timing differences. This segmentation enables the system to meet the coverage requirement of more than 1000 meters by accommodating timing differences up to 6.66 μs that cannot be handled by a single CP length.
2Adaptability or versatility
If multiple CP lengths are supported to meet coverage requirements, then timing difference accommodation is improved, but the system complexity and configuration overhead increase
Solution Approach 1:
The patent implements dynamic CP length selection by configuring different CP lengths for different slots based on the specific timing difference requirements. The receiving device can adaptively switch between first CP length and second CP length in different slots, allowing the system to handle varying timing differences without requiring complex real-time adjustments within each slot. This dynamic approach at the slot level balances adaptability with implementation simplicity.
Data Source
AI summary
Embodiments of the present disclosure relate to methods, devices and computer readable media for sidelink transmission and reception. A method of communication comprises receiving, at a receiving device, information from a transmitting device in a first slot starting from a first time. The method further comprises, in response to additional reception of the information being enabled, receiving the information from the transmitting device in a second slot starting from a second time, the second time being later than the first time by a time interval. Embodiments of the present disclosure can fulfill the coverage requirement for V2X communications in NR.