Wireless Node Resource Allocation for V2X Interference
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Solution Overview
Problem
In wireless communication systems, particularly in V2X (Vehicle-to-Everything) transmissions over Non-Terrestrial Networks (NTN), the large differences in Timing Advance (TA) between User Equipments (UEs) cause interference when unified time-domain resources are configured by the base station, leading to reduced spectrum efficiency and fragmented resources.
Innovation Solution
The method involves configuring K time-frequency resource pools with distinct time offsets to avoid interference between Uu and PC-5 interfaces, allowing for flexible scheduling and enhanced spectrum efficiency by associating time offsets with positional information and sub-carrier spacings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If unified time-domain resources are configured by the base station for V2X transmissions, then resource allocation simplicity is improved, but interference between Uu and PC-5 interfaces occurs due to large TA differences
Solution Approach 1:
The patent divides the unified time-domain resources into multiple separate time-domain resource pools, each with distinct time offsets. This segmentation allows different TA user groups to be allocated resources in different time segments, preventing interference between Uu and PC-5 interfaces while maintaining organized resource management.
Solution Approach 2:
The patent applies different time offsets to different time-frequency resource pools based on the TA characteristics of user groups. Each resource pool is locally optimized with appropriate time offsets to accommodate specific TA ranges, ensuring that users with similar TA characteristics are served without causing interference to other interfaces.
2Object-affected harmful factors
If time-domain resources are separated to avoid interference, then interface interference is reduced, but spectrum efficiency deteriorates due to resource fragmentation
Solution Approach 1:
The patent introduces dynamic adjustment mechanisms where time offsets and resource pool configurations can be adapted based on actual traffic conditions and TA distributions. This dynamic approach allows the system to optimize resource utilization while maintaining interference avoidance, preventing permanent resource fragmentation.
Solution Approach 2:
The patent changes the time offset parameters of different resource pools to optimize both interference avoidance and spectrum efficiency. By carefully selecting and adjusting these parameters, the system achieves separation of interference-prone transmissions while maximizing the utilization of available time-frequency resources.
3Object-affected harmful factors
If multiple time-frequency resource pools with distinct time offsets are configured, then interface interference is avoided, but device complexity increases
Solution Approach 1:
The patent designs a unified resource pool configuration framework that can serve multiple functions: interference avoidance, TA adaptation, and efficient resource allocation. This multi-functional approach reduces the need for separate specialized configurations, thereby managing device complexity while achieving interference avoidance.
Solution Approach 2:
The patent enables user equipment to self-identify which resource pool to use based on their TA characteristics and the configured time offsets. This self-service mechanism reduces the signaling overhead and configuration complexity by allowing devices to autonomously select appropriate resources without extensive network control.
Data Source
AI summary
The present disclosure provides a method and a device in a node for wireless communications. A first node receives a first signaling, the first signaling being used to determine K time-frequency resource pools; and transmits a first signal in a first time-frequency resource set; the first time-frequency resource set belongs to a first time-frequency resource pool, the first time-frequency resource pool being one of the K time-frequency resource pools; K time offsets respectively correspond to the K time-frequency resource pools, and the first signaling is used to determine the K time offsets corresponding to the K time-frequency resource pools; a first time offset corresponds to the first time-frequency resource pool. The present disclosure designs a first signaling to flexibly configure time-domain resources used for sidelink transmission, thus avoiding interferences between cellular link and sidelink in a system larger transmission delay.