Dynamic Multi-TRP Scheme Switching via Unified DCI Fields
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently switching between different multi-transmission/reception point (TRP) schemes, leading to increased signaling overhead and potential errors in configuration.
Innovation Solution
The system employs a method where a base station generates a Downlink Control Information (DCI) message with specific fields indicating the multi-TRP scheme, allowing the User Equipment (UE) to dynamically switch between different schemes while maintaining a consistent DCI message size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate fields are used to indicate multi-TRP scheme and antenna ports in DCI message, then configuration accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent merges the multi-TRP scheme indication and antenna port indication into a single unified field within the DCI message. This field contains both the multi-TRP scheme identifier and the antenna port information, eliminating the need for separate fields and thereby reducing signaling overhead while maintaining configuration accuracy through proper field interpretation.
Solution Approach 2:
The unified field serves multiple functions simultaneously: it indicates both the multi-TRP scheme type and the antenna ports for transmission. This multi-functional design allows a single field to carry multiple pieces of configuration information, reducing the total number of fields required and minimizing signaling overhead.
2Adaptability or versatility
If DCI message payload size varies with multi-TRP scheme, then configuration flexibility is improved, but processing complexity increases
Solution Approach 1:
The patent employs parameter changes by introducing a field indicator that changes the interpretation of subsequent fields based on the indicated multi-TRP scheme. When a different multi-TRP scheme is indicated, the same field bits are interpreted differently according to pre-configured mappings, allowing flexible configuration without varying payload sizes.
Solution Approach 2:
The DCI message structure uses dynamic field interpretation where the meaning of fields changes based on the indicated multi-TRP scheme. The UE dynamically adjusts its interpretation of field values according to the scheme type, enabling flexible configuration adaptation without requiring changes to the fundamental message structure or payload size.
3Measurement precision
If multiple DCI messages are used for different multi-TRP schemes, then configuration accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent segments the configuration information into distinct fields within a single DCI message: one field for the multi-TRP scheme indication and another field for antenna port indication. This segmentation allows accurate configuration of different schemes while using a single message structure, avoiding the overhead of multiple separate messages.
Solution Approach 2:
The patent uses an intermediary field indicator that mediates between the multi-TRP scheme selection and the antenna port configuration. This indicator field enables the system to switch between different configuration modes without requiring separate DCI messages, acting as a bridge that allows flexible configuration within a unified message structure.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. In some systems, a network may schedule a user equipment (UE) for multiple transmission/reception point (TRP) communication. The network may transmit a single downlink control information (DCI) message to the UE to dynamically configure multiple transmission configuration indicator (TCI) states for the multiple TRPs. In a first example, the DCI message may include a bit field indicating a set of antenna ports and the multi-TRP scheme for transmission. In a second example, the DCI message may include a separate field indicating the multi-TRP scheme (e.g., based on UE capabilities). In a third example, the DCI may indicate redundancy versions (RVs) for different TRPs in an RV field or across multiple fields. In a fourth example, the DCI may include an indication of a precoding resource block group (PRG) size that may be interpreted differently based on the indicated multi-TRP scheme.