Beam Sweep Pattern for Semi-Persistent Scheduling Activation
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G new radio (NR), face challenges in achieving robust communication during semi-persistent scheduling (SPS) and configured grant (CG) activations due to the lack of beam sweeping support, which results in suboptimal performance and increased latency.
Innovation Solution
Implementing a beam sweep pattern for SPS and CG activations, allowing for dynamic indication and multiplexing in the time, frequency, or spatial domain, enabling the use of multiple beam pairs for improved communication robustness on both uplink and downlink channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam sweeping is not supported during SPS and CG activations, then device complexity is reduced, but communication robustness deteriorates
Solution Approach 1:
The patent applies preliminary action by pre-configuring beam sweep patterns and beam pair links before SPS and CG activations. The network entity determines and indicates beam sweep patterns in advance, allowing the UE to prepare multiple beam pair links for potential use during periodic transmissions, thus improving communication robustness without adding complexity during actual data transmission.
2Reliability
If beam sweeping is implemented for SPS and CG activations, then communication robustness is improved, but latency increases
Solution Approach 1:
The patent resolves the latency issue by performing beam sweep pattern configuration and beam pair link establishment in advance, before periodic SPS/CG transmissions begin. This preliminary setup ensures that multiple beam pairs are ready for immediate use, avoiding time-consuming beam selection during actual data transmission and thus maintaining low latency while improving robustness.
3Reliability
If multiple beam pair links are used, then communication robustness is improved, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the beam management process into distinct components: beam sweep pattern configuration, beam pair link establishment, and active beam selection. This segmentation allows the system to manage multiple beam pair links systematically, improving robustness through diversity while keeping device complexity manageable through structured organization of beam management tasks.
Solution Approach 2:
The patent implements universality by creating a multi-functional beam management framework that serves multiple purposes: the same beam sweep pattern mechanism is used for both initial beam establishment and for maintaining robustness during periodic transmissions. This universal approach allows the system to handle multiple beam pair links efficiently without requiring separate complex mechanisms for each function.
4Reliability
If beam alignment is performed dynamically, then communication robustness is improved, but productivity decreases
Solution Approach 1:
The patent resolves this contradiction by performing beam alignment dynamically in advance during the configuration phase, before periodic SPS/CG transmissions begin. Multiple beam pair links are pre-aligned and ready, enabling the system to maintain high data transmission efficiency during actual operations while still benefiting from dynamic beam alignment capabilities for improved robustness when needed.
Data Source
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AI summary
Aspects described herein relate to beam sweep based semi-persistent signaling (SPS) or configured grant (CG) activation. In one aspect, a network entity may determine a beam sweep pattern for at least one of a SPS based downlink periodic transmission, an uplink control transmission for the SPS based downlink periodic transmission, or a CG based uplink periodic transmission. The network entity may further transmit an indication including the beam sweep pattern to a user equipment (UE). In another aspect, a UE may receive a beam sweep pattern for at least one of a SPS based downlink periodic transmission, an uplink control transmission for the SPS based downlink periodic transmission, or a CG based uplink periodic transmission from a network entity.