Sidelink Resource Exclusion for In-Band Emission Interference
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Solution Overview
Problem
Existing wireless communication technologies, particularly in 5G New Radio (NR), lack support for sidelink communication in shared spectrum, leading to interference issues due to in-band emission, which is not addressed by existing resource allocation methods.
Innovation Solution
A method and apparatus for determining candidate time-frequency resources to be excluded based on sidelink control information, excluding resources that overlap with other resources in both time and frequency domains to minimize interference from in-band emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If existing resource allocation methods are used for sidelink communication in shared spectrum, then device complexity is reduced, but interference from in-band emission increases
Solution Approach 1:
The patent applies preliminary action by excluding candidate time-frequency resources that may cause interference before the actual communication occurs. The user device determines and excludes resources based on predicted in-band emission characteristics, preventing interference issues from arising in the first place rather than addressing them reactively.
Solution Approach 2:
The patent introduces an intermediary mechanism through the exclusion determination process. By identifying and removing problematic resources from the candidate set before selection, the system creates a filtered resource pool that mediates between available spectrum and interference constraints, enabling safe resource utilization.
2Object-affected harmful factors
If more candidate time-frequency resources are excluded to reduce interference, then interference from in-band emission is reduced, but the number of available resources decreases
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the resource exclusion criteria based on detected communication parameters. The user device modifies the set of excluded resources according to actual transmission characteristics, allowing flexible adaptation that balances interference reduction with resource availability under different operating conditions.
Data Source
AI summary
A method for determining a resource, includes: receiving sidelink control information, the sidelink control information indicating a first time-frequency resource; and based on the sidelink control information, determining a candidate time-frequency resource to be excluded, where the candidate time-frequency resource to be excluded includes a candidate time-frequency resource that has resource coincidence with a second time-frequency resource, the second time-frequency resource has resource coincidence with the first time-frequency resource in a time domain, and has a different resource position from the first time-frequency resource in a frequency domain.