Sidelink Time Coordination for Single-Beam UE Reception
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Solution Overview
Problem
User equipments with limited capabilities cannot perform directional reception based on multiple reception beams simultaneously, leading to compromised quality of sidelink communication.
Innovation Solution
Implement methods to coordinate sidelink communication by sending non-overlapping time information, determining inter-user equipment coordination, managing physical sidelink feedback channels, and enabling omnidirectional reception under certain conditions to prevent overlapping sidelink information transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a reception UE performs directional reception based on multiple reception beams simultaneously, then the quality of sidelink communication is improved, but the device complexity increases beyond the capability of limited-capability UEs
Solution Approach 1:
The patent segments the reception process by dividing multiple reception beams into different time slots. The Rx UE receives sidelink information from multiple Tx UEs using different reception beams at different times rather than simultaneously, thus reducing the instantaneous capability requirement while maintaining overall communication quality
Solution Approach 2:
The patent introduces dynamic time slot allocation where the scheduling of reception beams is adjusted based on the capability information exchanged between UEs. Limited-capability UEs are assigned time slots that accommodate their single-beam constraint, while capable UEs can utilize multiple beams, creating a dynamic adaptation to device capabilities
2Reliability
If multiple Tx UEs transmit data based on different transmission beams to the same Rx UE, then the coverage and reliability are improved, but the time resources overlap causing interference when Rx UE has limited capability
Solution Approach 1:
The patent implements periodic time slot allocation where different Tx UEs transmit to the Rx UE in alternating time periods. This periodic scheduling ensures that transmissions using different beams do not overlap in time, eliminating interference while maintaining systematic coverage through regular transmission cycles
Solution Approach 2:
The patent applies preliminary action by having the Rx UE send capability information to Tx UEs before the actual data transmission begins. This allows Tx UEs to pre-plan their transmission schedules based on the Rx UE's capabilities, avoiding overlapping transmissions from the outset
Data Source
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AI summary
This application discloses a sidelink communication method, an apparatus, and a communication system, and relates to the field of wireless communication technologies. The method includes: A first terminal device indicates time in which a second terminal device sends sidelink information or a resource used by the second terminal device to send the sidelink information, to prevent a plurality of terminal devices from sending sidelink information to the first terminal device in overlapping time, so that the first terminal device can receive, based on non-overlapping time, the sidelink information sent by the plurality of terminal devices, to improve quality of sidelink communication between the terminal devices.