DCI Beam Indication Without Scheduling Data for UE Compatibility
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face inefficiencies in beam management due to the need for scheduling data in downlink control information (DCI) formats, leading to increased signaling overhead and potential misinterpretation by UEs with varying capabilities.
Innovation Solution
Implementing DCI formats that include configured fields for beam indication without scheduling data, allowing UEs to communicate based on transmission control indicators (TCIs), and enabling capability reporting to ensure compatibility and reduce errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If DCI format includes configured fields without scheduling data for beam indication, then signaling overhead is reduced and beam management flexibility is enhanced, but compatibility with UEs of different capabilities becomes more difficult
Solution Approach 1:
The system dynamically adapts DCI format based on UE capability. The base station determines whether a UE supports the new DCI format without scheduling data, and selectively applies the appropriate format. This dynamic adaptation resolves the contradiction by allowing the system to use the more efficient format when compatible while maintaining backward compatibility with UEs that require the traditional format with scheduling data.
Solution Approach 2:
The invention changes the parameter structure of DCI format by removing scheduling data fields while retaining configured fields for beam indication. This parameter modification enables reduced signaling overhead for supporting UEs, while the base station's capability-based selection mechanism ensures compatibility across different UE types through selective parameter application.
2Adaptability or versatility
If unified beam management is implemented across downlink and uplink channels, then beam management flexibility is enhanced, but system complexity increases
Solution Approach 1:
The DCI format is designed with universal configured fields that can indicate beam information for both downlink and uplink channels. This multi-functionality allows a single DCI message to manage beams across multiple channels, enhancing flexibility while the base station's centralized control logic manages the complexity of determining and applying the appropriate beam indications.
3Reliability
If capability indicator is transmitted to ensure UE compatibility, then communication reliability is improved, but signaling overhead increases
Solution Approach 1:
The capability indicator mechanism performs preliminary action by having UEs report their DCI format support capability in advance during capability exchange. The base station stores this information and uses it for subsequent DCI format selection, eliminating the need for continuous capability verification. This preliminary action ensures communication reliability while minimizing ongoing signaling overhead.
Data Source
AI summary
This disclosure provides systems, methods, and apparatuses that enable abase station (BS) to transmit downlink control information (DCI) without downlink data to indicate a transmission configuration indicator (TCI). In one aspect, a user equipment (UE) may transmit a capability indication associated with whether the UE can receive DCI with a TCI and without a data assignment. The UE may receive DCI with one or more configured fields and without downlink data and may interpret the DCI, based on the one or more configured fields, to identify a TCI. The TCI may be a Type 1 beam indication or another type of beam indication. The DCI may C be a DCI format 1_1 or 1_2 or another DCI format, such as DCI format 1_0 or a DCI scheduling an uplink configuration, among other CN examples, and may indicate another configuration with the TCI.