Sidelink SSB Waveform Design With Gap-Symbol Phase Continuity
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Solution Overview
Problem
Existing wireless communication systems face challenges in improving sidelink communications for high reliability and reducing latency, particularly in vehicle-to-everything (V2X) and device-to-device (D2D) networks, where efficient waveform design for synchronization signal blocks is lacking.
Innovation Solution
The proposed solution involves a UE transmitting a control signal during a first set of symbols and a synchronization signal during a subsequent symbol, with phase continuity maintained by mapping a repetition of the synchronization signal in a gap symbol, and employing specific resource block mappings and energy levels for enhanced reliability and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a gap symbol is inserted between control signal transmission and synchronization signal block transmission, then phase continuity is maintained, but transmission time is increased
Solution Approach 1:
The patent applies preliminary action by transmitting the synchronization signal during the gap symbol before the actual synchronization signal block transmission begins. This preliminary transmission of the synchronization signal in the gap symbol maintains phase continuity without requiring additional time after the main transmission, effectively resolving the time delay issue.
Solution Approach 2:
The patent implements dynamics by making the gap symbol configurable and adaptable. The gap symbol can be dynamically adjusted based on system requirements, allowing flexible timing adjustments to maintain phase continuity while optimizing transmission time according to specific operational conditions.
2Reliability
If synchronization signal block transmission is implemented in sidelink communications, then communication reliability is improved, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the synchronization signal block into distinct components (first synchronization signal and second synchronization signal) that can be transmitted in separate symbols. This segmentation allows for simplified processing and waveform design while maintaining the reliability benefits of comprehensive synchronization signal transmission in sidelink communications.
3Object-affected harmful factors
If control signal and synchronization signal are transmitted in separate symbols, then signal interference is reduced, but transmission latency is increased
Solution Approach 1:
The patent applies preliminary action by transmitting the synchronization signal during the gap symbol immediately after the control signal, before the main synchronization signal block transmission. This preliminary action reduces the overall time gap and minimizes latency while still maintaining signal separation to reduce interference.
Solution Approach 2:
The patent implements continuity of useful action by ensuring that the gap symbol is utilized for synchronous signal transmission rather than leaving it idle. This continuous utilization of transmission time reduces unnecessary delays while maintaining the beneficial separation between control and synchronization signals to minimize interference.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A first user equipment (UE) may determine that that the first UE is scheduled to transmit a control signal and a synchronization signal associated with a synchronization signal block. The first UE may transmit, to a second UE during a first set of symbols within a time period, the control signal associated with a sidelink communication. In some examples, the first UE may transmit, to the second UE during a symbol subsequent to the first set of symbols, the synchronization signal associated with the synchronization signal block, and may communicate with the second UE according to the transmitted control signal and the transmitted synchronization signal.