Common UL-DL Beam Indication for Lower DCI Signaling Overhead
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Solution Overview
Problem
Existing wireless communications systems face increased network overhead and inefficient resource use due to separate signaling for configuring uplink and downlink beams, which are often adjusted together.
Innovation Solution
Techniques for signaling a common downlink and uplink beam using a single DCI message, allowing simultaneous adjustment of both beams based on a pre-determined relationship or additional indication, reducing the need for separate configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate signaling is used to configure uplink and downlink beams, then each beam can be independently configured, but control signaling overhead increases and resource utilization becomes inefficient
Solution Approach 1:
The patent combines separate uplink and downlink beam configuration signaling into a unified beam indication mechanism. A single DCI message now carries beam indication information that simultaneously configures both uplink and downlink beams, eliminating the need for separate signaling procedures and reducing control overhead while maintaining the ability to independently adjust beam parameters through unified control
Solution Approach 2:
The beam indication field in the DCI message is designed to serve multiple functions: it indicates the downlink beam for PDSCH reception, the uplink beam for PUSCH transmission, and the spatial filter for PUCCH transmission. This multi-functional approach allows a single signaling element to control multiple beam-related parameters, reducing the total signaling overhead while maintaining comprehensive beam configuration capability
2Adaptability or versatility
If separate signaling is used for uplink and downlink beam configuration, then each transmission type can be optimized independently, but resource utilization efficiency decreases
Solution Approach 1:
The patent merges the configuration of beams for different transmission types (PDSCH, PUSCH, PUCCH) into a single beam indication mechanism. By using one DCI message to simultaneously indicate beams for multiple transmission types, the system achieves coordinated beam management that optimizes resource utilization while maintaining transmission-specific beam characteristics through the unified indication
3Measurement precision
If multiple DCI messages are used to schedule and configure beams for different transmissions, then each transmission can be precisely controlled, but control signaling complexity and overhead increase
Solution Approach 1:
The beam indication field in the DCI message is designed as a universal indicator that simultaneously controls multiple transmission parameters. A single beam indication value in the DCI message provides precise control over downlink beam, uplink beam, and spatial filter configuration, eliminating the need for multiple separate DCI messages while maintaining precise transmission control through consolidated signaling
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may be configured to receive, from a base station, a first downlink control information (DCI) message scheduling a first transmission between the UE and the base station. The first DCI message may include an indication of a first beam associated with the first transmission and a second beam associated with a second transmission, where the second beam is associated with the first beam. The UE may then communicate with the base station via the second beam associated with the second transmission based on the first DCI message including the indication of the second beam, where the second transmission is scheduled by a second message different from the first DCI message.