Transport Block Sizing Across Mixed SBFD Multi-Slot Transmission
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Solution Overview
Problem
Existing wireless communication systems face challenges in determining the transport block size when implementing subband full duplex operations, as the availability of frequency resources varies across uplink and downlink slots due to the inclusion of uplink subbands in downlink slots, leading to undefined TB size determination.
Innovation Solution
A method for selecting slots based on a slot selection scheme, where the UE determines the transport block size by identifying available slots, considering the quantity of resource elements in each slot type, and allocating resources accordingly to ensure consistent frequency resource availability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the UE selects the first available slots regardless of slot type for TBoMS transmission, then the transmission can start immediately without waiting for slot alignment, but the quantity of frequency resources varies across different slot types making transport block size determination undefined
Solution Approach 1:
The patent applies local quality by treating different slot types (uplink slots vs. downlink slots with uplink subband) differently in terms of resource element calculation. Each slot type has its specific method for determining available resource elements, accounting for the unique characteristics of each slot type rather than applying a uniform approach.
Solution Approach 2:
The patent implements dynamics by making the slot selection and resource element determination adaptive based on the actual slot types encountered. The UE dynamically adjusts its resource element calculation method depending on whether it encounters uplink slots or downlink slots with uplink subband, allowing flexible adaptation to varying slot configurations while maintaining consistent transport block size determination.
2Reliability
If the UE selects slots of the same type for TBoMS transmission, then the frequency resources remain consistent across slots, but this may delay transmission by skipping incompatible slots
Solution Approach 1:
The patent applies parameter changes by modifying the resource element calculation parameters based on slot type. Instead of requiring uniform slot types, the system changes the calculation parameters to account for the specific characteristics of each slot type, allowing transport block size determination to work correctly across mixed slot types while maintaining frequency resource consistency.
3Productivity
If downlink slots configured with uplink subband are used for TBoMS transmission, then spectrum utilization is improved, but the quantity of available frequency resources in each slot becomes undefined
Solution Approach 1:
The patent applies segmentation by dividing the resource element calculation process into distinct segments for different slot types. For downlink slots with uplink subband, the calculation separately accounts for the uplink subband portion and the downlink portions, providing a structured method to determine available frequency resources in these complex slot configurations.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. Techniques described herein support transmission of a transport block over multiple slots (TBoMS) with subband full duplex (SBFD) operation. For example, if a time domain resource allocation for a TBoMS includes both uplink slots and downlink slots configured with an uplink subband, a user equipment (UE) may determine which slots to use in accordance with a scheme for selecting available slots for the TBoMS from indicated candidate slots, and the UE may determine the transport block size based on the selected slots. In some examples, the UE may first determine the quantity of resource elements available in each of the different slot types, and then may determine the transport block size based on the quantity of resource elements available in each of the different slot types and the quantity of each of the different slot types.