Broadcast Beam Switching Timing for High-SCS NR Data Reception
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Solution Overview
Problem
The current NR design fails to consider reserving time for beam switching when higher Sub-Carrier Spacing (SCS) is used, leading to disruptions in communication due to beam switching times exceeding the Cyclic Prefix (CP) duration.
Innovation Solution
A method for broadcast data communication that involves determining configuration information including beam switching positions and extended CP, with specific configurations for SSB candidate positions, broadcast control channel monitoring occasions, and time-domain scheduling parameters to accommodate beam switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If higher Sub-Carrier Spacing (SCS) is used to overcome Doppler frequency deviation and phase noise at high frequencies, then communication reliability is improved, but beam switching time exceeds the Cyclic Prefix (CP) duration causing communication disruptions
Solution Approach 1:
The patent introduces a beam switching symbol that is configured in advance before actual beam switching occurs. This preliminary action reserves the necessary time for beam switching to complete before data transmission begins, preventing communication disruptions while maintaining the benefits of higher SCS for reliability.
Solution Approach 2:
The patent segments the time domain by introducing a dedicated beam switching symbol separate from data transmission symbols. This segmentation allows beam switching to occur in a designated time slot without interfering with data transmission, resolving the conflict between beam switching time and CP duration.
2Duration of action of stationary object
If beam switching symbols are introduced to accommodate beam switching time, then communication continuity is maintained, but the existing technology system is impacted requiring new SSB transmission and RMSI data scheduling methods
Solution Approach 1:
The patent makes the system dynamic by configuring beam switching symbols flexibly based on whether beam switching is required. The network device can adaptively adjust the time domain parameters of SSB and RMSI according to actual beam switching needs, allowing the system to maintain communication continuity while managing complexity through conditional configuration rather than fixed structure.
3Reliability
If the Cyclic Prefix (CP) duration is extended to accommodate beam switching time, then beam switching can be completed within the CP period, but data transmission efficiency decreases due to longer CP overhead
Solution Approach 1:
The patent extracts the beam switching function from the Cyclic Prefix by introducing a separate beam switching symbol. This allows beam switching to be completed without extending the CP duration, thereby maintaining data transmission efficiency while ensuring reliable beam switching completion. The beam switching operation is separated from the data transmission path.
Data Source
AI summary
Disclosed are a broadcast data transmission method and apparatus, and a device. The method includes determining first configuration information of a beam switching position, or, using second configuration information of a second cyclic prefix (CP), and the first configuration information/the second configuration information includes a configured synchronization signal block (SSB) candidate position, a broadcast control channel detection occasion, and a time-domain scheduling parameter of a data channel for receiving broadcast data; and according to the first configuration information/the second configuration information, transmitting an SSB and a broadcast control channel in a beam behind the beam switching position or the CP. By using the method provided in the present disclosure, the problem of efficient reception of broadcast data under beam switching during higher SCS can be solved.