DCI Field Configuration for Multi-Cell Scheduling
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Solution Overview
Problem
In wireless communication systems, particularly in 5G NR, the determination of whether a field in a single DCI indicates the same information for multiple cells or different information for each cell is a key unresolved issue, complicating multi-cell scheduling and increasing complexity and costs.
Innovation Solution
A unified design scheme for DCI field configuration, where the type of each combination in a list indicates the number of cells, allowing for flexible scheduling and reducing signaling overhead by configuring the type of field in the DCI, enabling efficient operation of channels like PDSCH and PUSCH across multiple cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single DCI schedules multiple cells with unified field configuration, then scheduling flexibility is improved, but the complexity of determining field interpretation (same vs. different information) increases
Solution Approach 1:
The patent changes the interpretation parameter of DCI fields based on the scheduling scenario. When a single DCI schedules multiple cells, the field interpretation parameter switches between 'same information for all cells' and 'different information for each cell' based on pre-configured combinations, resolving the complexity while maintaining flexibility
Solution Approach 2:
The patent introduces dynamic field interpretation where the meaning of DCI fields is not fixed but adapts according to the scheduling scenario and pre-configured combination types. This dynamic approach allows the system to switch between unified and differentiated field interpretations as needed
2Measurement precision
If multiple fields of the same name are used to indicate different information for each cell, then cell-specific scheduling precision is improved, but DCI size and signaling overhead increase
Solution Approach 1:
The patent makes DCI fields universal by allowing the same field name to serve multiple functions depending on the scheduling scenario. A single field can indicate either the same information for all cells or different information for each cell, eliminating the need for separate fields and reducing DCI size
Solution Approach 2:
The patent merges multiple potential field instances into a single field definition that adapts its interpretation. Instead of having separate fields for different cells, the system combines them into one field whose meaning is determined by the scheduling scenario and pre-configured combinations
3Ease of operation
If blind decoding is performed without pre-configured combination types, then detection flexibility is maintained, but blind detection complexity and processing time increase
Solution Approach 1:
The patent performs preliminary configuration of combination types and field interpretations before blind decoding occurs. By pre-establishing the relationship between DCI fields and cell information in different scenarios, the system reduces the complexity and time required for blind decoding while maintaining flexibility
Data Source
AI summary
A first node receives a first signaling and a first DCI; where the first signaling indicates a type of each combination in a first combination list, and candidates of the type of each combination in the first combination list include at least a first type and a second type; each combination in the first combination list comprises a first name, the first name being a name of a DCI field; the first DCI comprises a first field, and the first field of the first DCI indicates multiple cells; the first DCI comprises and only comprises M field(s), and a name of each of the M field(s) is the first name. Application is applicable to different kinds of scenarios by configuring types of multiple DCI fields via RRC signaling, which reduces the DCI overhead.