Beam Selection for Multi-Transport Block Scheduling Delays
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Solution Overview
Problem
Existing wireless communication technologies face inefficiencies in scheduling multiple transport blocks (TBs) due to varying time offsets between downlink control information (DCI) and physical downlink shared channel (PDSCH) occasions, leading to increased signaling overhead and decoding delays.
Innovation Solution
Implementing a method where a user equipment (UE) or base station uses a beam (or transmission configuration indicator state) for each scheduled PDSCH based on the time offset from the DCI, either using a default beam or an indicated beam depending on the time threshold, to optimize beam determination and resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single beam is used for all scheduled PDSCH occasions, then device complexity is reduced, but signal strength deteriorates when time offsets vary
Solution Approach 1:
The patent applies dynamics by making the beam selection adaptive based on the time offset value. Instead of using a fixed beam for all PDSCH occasions, the system dynamically selects between default beam and indicated beam according to whether the time offset is below or above a threshold, optimizing signal strength for varying temporal conditions
Solution Approach 2:
The patent changes the beam parameter based on the time offset parameter. When the time offset crosses a threshold, the system switches between different beam configurations (default vs. indicated), allowing the beam parameter to adapt to changing temporal conditions and maintain optimal signal strength
2Loss of information
If default beam is used for all PDSCH occasions, then signaling overhead is reduced, but communication quality deteriorates when time offsets are large
Solution Approach 1:
The patent segments the PDSCH occasions into two groups based on the time offset threshold: occasions with small time offsets use default beam (minimal signaling), while occasions with large time offsets use indicated beam (enhanced communication quality). This segmentation allows the system to optimize for both low overhead and high reliability in different scenarios
3Strength
If beam switching is implemented based on time offset threshold, then signal strength is improved, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring threshold values and beam parameters before PDSCH transmission. The UE is provided with threshold information in advance, allowing it to autonomously determine the appropriate beam without real-time complex decision-making, thus improving signal strength while limiting complexity increase
Data Source
AI summary
Aspects described herein relate to receiving control information that schedules multiple data transmissions to be received by a user equipment (UE), receiving a first data transmission of the multiple data transmissions using, based on whether the first data transmission is scheduled to be received before or after a threshold time, one of a first beam identified in the control information or a first default beam, where the threshold time is a time offset from a time at which the control information is received, and receiving a second data transmission of the multiple data transmissions using one of the first beam identified in the control information, a second beam identified in the control information, or a second default beam. Other aspects relate to transmitting the control information, the first data transmission, and the second data transmission.