Sidelink Resource Selection With Dynamic Guard Bands for SBFD
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Solution Overview
Problem
The introduction of subband non-overlapping full duplex (SBFD) technology in sidelink communication poses challenges in resource selection for terminal devices, leading to self-interference when simultaneously receiving and sending data.
Innovation Solution
A sidelink communication method that allows terminal devices to dynamically configure guard bands between receiving and sending resources based on actual communication status, using sidelink control information to indicate resource usage and reduce self-interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If SBFD technology is introduced in sidelink communication to support flexible uplink and downlink resource configuration, then resource configuration flexibility is improved, but self-interference occurs when terminal device simultaneously receives and sends data
Solution Approach 1:
The patent segments the frequency spectrum into multiple subbands and assigns specific subbands for receiving and sending operations. By dividing the frequency resources into distinct segments, the terminal device can simultaneously receive and send data on different frequency subbands while avoiding self-interference through proper subband allocation and guard band configuration.
2Productivity
If terminal device uses overlapping time-domain resources for receiving and sending, then resource utilization is improved, but self-interference increases
Solution Approach 1:
The patent transitions from time-domain resource separation to frequency-domain resource separation by introducing subband-based full duplex operation. Instead of allocating different time slots for receiving and sending, the system allows simultaneous operations in the same time domain but on different frequency subbands, thereby improving resource utilization while managing self-interference through frequency domain isolation.
3Object-generated harmful factors
If guard band is configured between receiving and sending resources, then self-interference is reduced, but resource waste increases
Solution Approach 1:
The patent implements dynamic guard band configuration where the size and presence of guard bands between receiving and sending subbands are adaptively adjusted based on actual communication conditions, channel state, and interference levels. This dynamic approach allows the system to minimize resource waste by reducing or eliminating guard bands when interference is low, while maintaining adequate protection when interference conditions require it.
Data Source
AI summary
A sidelink communication method and a communication apparatus, the method including sending, by a first terminal device or a chip of the first terminal device, first information to a second terminal device, where the first information indicates whether the first terminal device uses a first resource as a receiving resource, where the first resource is a resource that overlaps a second resource in a time domain and that is adjacent to the second resource in a frequency domain, where the second resource is a reserved sending resource of the first terminal device, and where the first terminal device is a subband non-overlapping full duplex device.