Dynamic DCI Bit-Field Sizing for Bandwidth Part Switching
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Solution Overview
Problem
Ambiguity arises during bandwidth part (BWP) switching in wireless communications systems due to differences in timing parameter tables between BWPs, leading to inefficiencies in DCI formatting and resource allocation.
Innovation Solution
A method and apparatus for managing timing parameters during BWP switching by identifying and utilizing a set of timing parameter tables associated with both the current and target BWPs, adjusting the size of the resource allocation bit field based on the configuration of the first BWP, and communicating accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the DCI format is based on the first BWP configuration, then the DCI can be properly formatted and transmitted, but the flexibility is constrained when applying to the second BWP with different table size
Solution Approach 1:
The patent implements dynamic adaptation of the resource allocation bit field size based on the target BWP's timing parameter table size. When switching to a second BWP with a different table size, the bit field size is adjusted accordingly to properly index the new table, thereby maintaining flexibility while ensuring proper DCI formatting for the target BWP configuration
Solution Approach 2:
The patent changes the parameter of bit field size dynamically during BWP switching. The resource allocation bit field size is modified to match the requirements of the target BWP's timing parameter table, allowing the DCI to adapt to different BWP configurations without being constrained by the source BWP's parameters
2Quantity of substance
If a smaller bit field is used to index the second BWP table, then the DCI size is reduced, but only a subset of the table can be addressed
Solution Approach 1:
The patent dynamically adjusts the bit field size to match the requirements of the target BWP's timing parameter table. When switching to a second BWP, the resource allocation bit field is resized to provide sufficient indexing capability for the entire second table, ensuring complete table coverage while optimizing DCI size for the specific BWP configuration
3Speed
If BWP switching is performed without timing parameter adjustment, then switching speed is fast, but ambiguity arises due to differences in timing parameter tables
Solution Approach 1:
The patent performs preliminary adjustment of timing parameters during the BWP switching process. Before or during the BWP switch, the resource allocation bit field size is pre-adjusted to match the target BWP's timing parameter table requirements, eliminating potential ambiguity while maintaining efficient switching speed through streamlined parameter transition
Data Source
AI summary
Bandwidth part (BWP) switching may benefit a wireless communications system. Such BWP switching may include indication of one or more timing parameters used for time domain resource allocation. For example, the timing parameters may be indicated based on an index to a look-up table (e.g., a bit field in a control transmission). In some cases, one or more tables may be configured for a given BWP, and different tables may contain a different number of rows. The size of the bit field indexing the table may in turn depend on the number of rows. When switching from a first BWP to a second BWP, the size of the bit field may be based on the table of the first BWP, but the bit field may index the table of the second BWP. Techniques supporting improved timing parameter management during BWP switching are discussed herein.