Sidelink Co-Channel Coexistence via Dynamic Spectrum Sharing
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Solution Overview
Problem
Wireless communication systems face challenges in managing and optimizing finite wireless channel resources due to signal attenuation and blocking in complex environments, leading to interference between different radio access technologies (RATs) like LTE and NR during sidelink communications.
Innovation Solution
The method involves monitoring control information for one RAT to schedule sidelink transmissions of another RAT, selecting non-overlapping resource pools, and coordinating resource selection to minimize interference, allowing co-channel co-existence of different RATs while reducing interference through dynamic spectrum sharing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If different RATs share frequency channels for sidelink communications, then resource utilization is enhanced, but interference between RATs increases
Solution Approach 1:
The patent applies preliminary action by having UEs monitor control information from other RATs in advance before scheduling their own transmissions. The UE detects control information indicating resource allocations by other RATs and uses this information to make preliminary scheduling decisions, avoiding interference before it occurs. This is implemented through the mechanism where a UE monitors SCI from other UEs and uses this information to select non-interfering resource pools for its own sidelink transmissions.
Solution Approach 2:
The patent implements feedback through the control information monitoring mechanism where UEs continuously detect and process control information transmitted by other RATs. This feedback loop allows each UE to be aware of resource allocations made by other RATs and adjust its own scheduling accordingly. The feedback mechanism operates at the physical layer through SCI transmissions that provide real-time information about ongoing and scheduled transmissions, enabling dynamic adaptation to avoid interference.
2Reliability
If UEs monitor control information from other RATs to schedule transmissions, then interference is minimized, but device complexity increases
Solution Approach 1:
The patent applies universality by designing the control information monitoring mechanism to work across different RATs (LTE and NR) using a unified approach. The same basic mechanism of monitoring SCI and using it for scheduling decisions is applied universally regardless of which specific RAT is involved. This multi-functional approach allows the UE to handle interference avoidance for various RAT combinations through a single standardized process, reducing overall system complexity despite the multi-RAT environment.
Data Source
AI summary
Certain aspects of the present disclosure are directed to techniques for configuring sidelink communication. One example method by a user-equipment (UE) generally includes monitoring for first control information scheduling a first sidelink (SL) transmission of a first radio access technology (RAT) on a resource pool, and taking one or more actions for scheduling of a second SL transmission of a second RAT based on the monitoring of the first control information, wherein the first RAT is different than the second RAT.