Unified Downlink Control Information Format for Multipoint Transmission
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Solution Overview
Problem
Existing wireless communication systems face complexity in processing control information when multiple base stations provide coordinated data transmission, leading to excessive complexity and energy consumption in both base stations and user equipment (UE), due to the need for different control information formats in various scenarios.
Innovation Solution
A method where a transmission reception point (TRP) determines and sends quantity information of control information to the UE, allowing the UE to detect the necessary control information from multiple TRPs using a standardized format, reducing the need for frequent format changes and enabling efficient multipoint transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different control information formats are used for single point and multipoint transmissions, then the control information can be optimized for each scenario, but the processing complexity and energy consumption of base stations and UE increase excessively
Solution Approach 1:
The patent applies universality by designing a single downlink control information format that serves both single point and multipoint transmission scenarios. The control information structure includes fields that can accommodate different transmission types through configurable parameters, allowing the same format to function across multiple operational modes without requiring separate format definitions for each scenario.
Solution Approach 2:
The patent utilizes parameter changes by introducing configurable fields within the unified control information format that can be adjusted based on the transmission scenario. By modifying parameter values rather than format structure, the system adapts to different transmission types (single point vs. multipoint) while maintaining format consistency, thereby reducing processing complexity.
2Adaptability or versatility
If control information format is extended to indicate scheduling information of multiple base stations, then coordinated transmission can be supported, but the format changes frequently and processing becomes excessively complex
Solution Approach 1:
The patent applies segmentation by dividing the control information into distinct fields: one set of fields indicates the number of base stations participating in coordinated transmission, while another set contains the actual scheduling information for each base station. This structured segmentation allows the system to support variable numbers of base stations without requiring format changes, as the same format structure can accommodate any number of participants through proper field configuration.
3Adaptability or versatility
If multiple control information formats are maintained for different scenarios, then scenario-specific optimization is achieved, but backward compatibility and transmission efficiency are reduced
Solution Approach 1:
The patent implements universality by creating a single downlink control information format that can handle both single point and multipoint transmission scenarios. This unified format maintains backward compatibility with existing systems while enabling new multipoint transmission capabilities, thereby improving transmission efficiency by eliminating the overhead associated with format switching and multiple format maintenance.
Data Source
AI summary
A communication method comprises that a user equipment receives quantity information, sent by a transmission reception point TRP, of control information to be sent to the user equipment. N pieces of control information are to be sent to the user equipment, and N is an integer greater than or equal to 1. The user equipment determines, based on the quantity information, that the N pieces of control information need to be detected; and the user equipment detects the N pieces of control information. In an embodiment, processing complexity of the TRP and processing complexity of the user equipment can be reduced in a control information obtaining process.