Traffic-Triggered Beam Windows for PDSCH DMRS Selection
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing beamforming for PDSCH DMRS transmissions, particularly in dynamic network conditions, leading to suboptimal communication performance.
Innovation Solution
A method and apparatus for a user equipment (UE) to identify a beam management window based on downlink traffic parameters, perform a beam sweep on received PDSCH DMRS transmissions, and select an optimal beam for communication using associated metrics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If beam sweep is performed continuously on all PDSCH DMRS transmissions, then beam selection accuracy is improved, but system complexity and processing overhead increase
Solution Approach 1:
The patent segments the continuous beam sweep process into discrete beam management windows. Instead of performing beam sweep on all PDSCH DMRS transmissions continuously, the system divides time into specific windows where beam sweep is performed only when needed. This segmentation reduces unnecessary processing while maintaining beam selection accuracy when conditions warrant it.
Solution Approach 2:
The patent implements periodic beam management windows at predetermined time intervals. Rather than continuous beam sweep operations, the system performs beam management actions periodically based on configured time patterns. This periodic approach reduces system complexity by eliminating continuous processing while ensuring beam selection is updated at appropriate intervals to maintain accuracy.
2Measurement precision
If beam management window is opened frequently, then beam selection performance is improved, but loss of time for data transmissions increases
Solution Approach 1:
The patent makes the beam management window configuration dynamic by allowing the network to configure window parameters (timing, duration, frequency) based on current network conditions and traffic requirements. This dynamic adjustment enables the system to open windows frequently enough to maintain beam selection performance while minimizing time loss for data transmissions by closing windows when not needed.
Solution Approach 2:
The patent changes key parameters of the beam management process including window timing, duration, and triggering conditions. By adjusting these parameters based on network conditions, the system optimizes the balance between beam selection performance and data transmission efficiency, reducing time loss while maintaining adequate beam selection accuracy.
3Reliability
If beam sweep is performed on every PDSCH DMRS transmission, then communication reliability is improved, but productivity decreases
Solution Approach 1:
The patent performs beam sweep operations in advance during configured beam management windows before actual data transmissions occur. This preliminary beam management ensures that the best beam is selected ahead of time, maintaining communication reliability for subsequent data transmissions without requiring beam sweep during every transmission, thus preserving productivity.
Solution Approach 2:
The patent maintains continuous communication reliability by ensuring beam management windows are configured to continuously update beam selections during periods of high reliability needs, while allowing data transmissions to proceed continuously without interruption. The system maintains the continuity of useful actions by decoupling beam management timing from data transmission timing.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may identify a beam management window based at least in part on one or more downlink traffic parameters satisfying a window opening condition. The UE may perform a beam sweep on a set of beams associated with one or more physical downlink shared channel (PDSCH) demodulation reference signal (DMRS) transmissions that are received during the beam management window. The UE may select, among the set of beams associated with the one or more PDSCH DMRS transmissions received during the beam management window, a beam to use to communicate with a network node based at least in part on one or more metrics associated with each respective beam included in the set of beams. Numerous other aspects are described.