Wireless Device Transmission Configuration via DCI Field Segmentation
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently configuring transmission resources and managing transmission/reception schedules, particularly in scenarios involving spatial domain multiplexing (SDM) and phase-tracking reference signals (PT-RSs).
Innovation Solution
The proposed solution involves configuring wireless devices with configuration parameters received from a base station, which include scheduling messages with specific fields and parameters. This configuration allows for the indication of transmission resources, such as SDM schemes, and the association of PT-RSs with demodulation reference signal (DM-RS) ports based on transmission configuration indicator selection fields or their absence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If transmission resources are configured with detailed SDM schemes and PT-RS associations, then communication efficiency is improved, but device complexity increases
Solution Approach 1:
The transmission configuration is segmented into multiple independent fields within the DCI message: a first field for indicating SDM scheme, a second field for indicating PT-RS association, and a third field for TCI state indication. This segmentation allows each parameter to be configured independently and reduces the overall complexity of processing the complete configuration.
Solution Approach 2:
The patent applies partial action by providing optional fields that may be present or absent depending on the specific transmission scenario. For example, the PT-RS association field is only included when PT-RS needs to be associated with DM-RS ports. This allows the system to configure only the necessary parameters for each situation, reducing complexity when full configuration is not needed.
2Productivity
If multiple TCI states are configured for scheduled transmission, then transmission effectiveness is improved, but configuration management complexity increases
Solution Approach 1:
TCI states are pre-configured and associated with DM-RS ports before the actual transmission occurs. The base station provides a mapping between TCI states and DM-RS ports in advance, allowing the wireless device to quickly select the appropriate TCI state during transmission without complex real-time configuration management.
Solution Approach 2:
The patent introduces DM-RS ports as an intermediary element that mediates between TCI states and the actual transmission configuration. Instead of directly managing complex TCI state configurations, the system uses DM-RS port associations as a simplifying intermediary, making configuration management more straightforward while maintaining transmission effectiveness.
3Use of energy by moving object
If discontinuous transmission/reception is implemented with DTX/DRX settings, then energy saving is improved, but transmission scheduling complexity increases
Solution Approach 1:
The patent merges the energy saving functionality of DTX/DRX with the existing transmission scheduling mechanism by integrating these settings into the same DCI message that handles transmission configuration. This merging allows the system to manage both transmission scheduling and energy saving in a unified manner, reducing overall complexity.
Solution Approach 2:
The DCI message structure is designed to be universal, handling multiple functions including transmission scheduling, TCI state indication, PT-RS configuration, and DTX/DRX settings all within a single message type. This multi-functionality reduces the need for separate control mechanisms and simplifies the overall system architecture.
Data Source
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AI summary
A wireless device may communicate with a base station using transmission resources/schemes. A resource/scheme for transmission/reception may be indicated by a field and/or by an absence of a field in a message that schedules transmission/reception. For example, a spatial domain multiplexing (SDM) scheme may be used, for scheduled transmission/reception, based on a value in a transmission configuration indicator selection field and/or based on an absence of such a field in a message.