FDMed SSB Beam Management for 5G Latency Reduction
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Solution Overview
Problem
The existing beam management framework for 5G NR systems, particularly above 52.6 GHz, faces challenges with high transmission latency due to the need for multiple SSB transmissions for beam sweeping, which is inefficient for high-frequency systems.
Innovation Solution
Introducing Frequency Domain Multiplexed (FDMed) SSBs for beam management, where multiple SSBs are transmitted simultaneously over the same OFDM symbols, allowing the UE to measure multiple Tx beams simultaneously and accelerate beam sweeping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple SSB transmissions are used for beam sweeping, then beam coverage is improved, but transmission latency increases
Solution Approach 1:
The patent transitions from time-division multiplexed SSB transmissions to frequency-division multiplexed SSB transmissions. By allocating different SSBs to different frequency resources within the same time slot, the system enables simultaneous transmission of multiple beams without increasing time latency, thereby resolving the contradiction between beam coverage and transmission latency.
Solution Approach 2:
The patent combines multiple SSB transmissions that were previously separated in time into a single time slot by using different frequency resources. This merging approach allows the UE to measure multiple beams simultaneously, achieving both comprehensive beam coverage and reduced transmission latency.
2Measurement precision
If multiple SSB transmissions are performed sequentially, then beam measurement accuracy is improved, but beam sweeping efficiency deteriorates
Solution Approach 1:
The patent moves beam measurements from a sequential time-based process to a parallel frequency-based process. By assigning different SSBs to different frequency resources, the UE can perform simultaneous measurements on multiple beams, thereby improving beam sweeping efficiency while maintaining measurement accuracy through proper frequency resource allocation.
Solution Approach 2:
The patent enables continuous beam measurement by allowing the UE to measure multiple SSBs simultaneously in the frequency domain within a single time slot. This eliminates the idle time between sequential measurements, maintaining continuous useful action and improving overall beam sweeping efficiency.
3Measurement precision
If beam sweeping is performed with multiple transmissions, then beam alignment accuracy is improved, but system complexity increases
Solution Approach 1:
The patent simplifies the system by transitioning from time-sequential to frequency-parallel beam sweeping. This dimensional change allows the gNB to transmit multiple beams simultaneously using frequency division, reducing the complexity of time scheduling and beam management while maintaining alignment accuracy through frequency resource allocation.
Data Source
AI summary
Methods, systems, and storage media are described for beam management for higher-frequency systems, such as, for example, those above 52.6 GHz. Other embodiments may be described and/or claimed.