LTE-to-NR Sidelink Sensing Sharing for Resource Conflict Reduction
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Solution Overview
Problem
In wireless communication networks, the co-channel coexistence of LTE and NR sidelink communications face challenges such as resource allocation conflicts, interference, and inefficient utilization due to overlapping sub-channels and differing channel busy ratios, particularly when LTE and NR share the same frequency channel.
Innovation Solution
The solution involves sharing sensing information between LTE and NR modules, utilizing intra-UE coordination, and implementing frequency division multiplexing with guard bands to separate resource pools, thereby optimizing resource selection and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If LTE and NR sidelink communications share the same frequency channel, then spectrum utilization is improved, but resource allocation conflicts and interference increase
Solution Approach 1:
The patent segments the shared frequency channel into separate resource pools for LTE and NR sidelink communications. By dividing the available time-frequency resources into distinct pools with different configurations (subcarrier spacings, slot formats), the system enables both technologies to coexist on the same channel while minimizing resource allocation conflicts and interference through structured resource separation.
2Adaptability or versatility
If LTE and NR use overlapping sub-channels, then resource flexibility is improved, but channel busy ratio calculations become inaccurate
Solution Approach 1:
The patent applies local quality by configuring different sub-channel properties for LTE and NR resource pools. Each resource pool has customized subcarrier spacings, slot durations, and sub-channel structures optimized for its specific technology. This allows flexible resource allocation while ensuring that channel busy ratio calculations for each technology are performed independently on appropriately configured resources, maintaining measurement accuracy despite overlapping frequency usage.
3Productivity
If sensing information is shared between LTE and NR modules, then resource selection efficiency is improved, but coordination complexity increases
Solution Approach 1:
The patent merges the sensing functions of LTE and NR modules into a coordinated intra-UE sensing mechanism. The UE performs sensing operations that capture channel conditions relevant to both technologies, shares the sensed information between LTE and NR resource selection algorithms, and enables joint resource selection decisions. This unified sensing approach improves resource selection efficiency by avoiding duplicate sensing operations and leveraging shared channel state information across both communication technologies.
Data Source
AI summary
A processor having circuitry to execute instructions is disclosed. The instructions perform operations that include obtaining sensing information using a first circuitry of a UE, the first circuitry configured to perform a first sidelink communication of a first technology. The operations include sharing the sensing information obtained using the first circuitry with a second circuitry of the UE, the second circuitry configured to perform a second sidelink communication of a second technology. The operations include obtaining inter-UE coordination information from a coordinating UE. The operations include identifying a pool of candidate resources based at least on the shared sensing information and the inter-UE coordination information. The operations include selecting, from the pool of candidate resources, a resource for the second sidelink communication.