Sidelink Interference Measurement Using Guard Bands
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Solution Overview
Problem
Current wireless communication systems face challenges in accurately measuring interference during sidelink communication, particularly in full-duplex mode, where devices transmit and receive on the same frequency resources, leading to self-interference issues.
Innovation Solution
A method for user equipment (UE) to receive scheduling information from a base station indicating allocated sidelink resources for full-duplex communication, where a specific frequency resource is used for self-interference measurement while transmitting on another frequency resource, with provisions to ensure nearby devices do not interfere during measurement by using guard bands or reserved resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If full-duplex communication is used where devices transmit and receive on the same frequency resources, then communication efficiency and resource utilization are improved, but self-interference measurement accuracy deteriorates
Solution Approach 1:
The frequency resources are segmented into distinct portions: one set of resources for transmission and another set for interference measurement. This segmentation allows the device to separately measure interference on dedicated measurement resources while maintaining full-duplex communication on other resources, thereby resolving the contradiction between communication efficiency and measurement accuracy.
2Measurement precision
If guard bands or reserved resources are used to prevent nearby devices from interfering during measurement, then measurement accuracy is improved, but resource utilization deteriorates
Solution Approach 1:
Instead of reserving extensive guard bands that would significantly reduce resource utilization, the patent applies partial action by designating specific, limited measurement resources within the available spectrum. This approach provides sufficient isolation for accurate measurement while minimizing the impact on overall resource utilization by using only the necessary portion of resources for measurement purposes.
Data Source
AI summary
Aspects relate to measuring interference associated with sidelink communication. A UE that supports full-duplex communication may transmit on a first frequency resource and conduct self-interference measurements on a second frequency resource (e.g., a guard band) adjacent to the first frequency resource. Provisions may be made to ensure that other nearby wireless communication devices do not transmit on the second set of frequency resources when the UE is conducting an interference measurement. In a first resource allocation mode, a base station that allocates full-duplex resources for a first UE may ensure that any UEs that are near the first UE are not scheduled to transmit on a guard band when the UE is conducting an interference measurement. In a second resource allocation mode, a UE may reserve resources that are predefined with a guard band or the UE may reserve resources and use a subset of the resources for interference measurements.