Reference Signal Transmission for Multi-Beam Reception
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Solution Overview
Problem
In the context of new radio (NR) systems, where multiple beams can be used simultaneously for communication, user equipment (UE) may struggle to receive data on non-indicated beams effectively, leading to poor performance due to reliance on a single receive beam.
Innovation Solution
The method involves determining and utilizing multiple reference signal resources for receiving channels when the scheduling offset is within a threshold or spatial relation parameters are absent, allowing simultaneous or overlapping reception to enhance data reception probability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the network device communicates with the UE by using only one beam at a specific moment, then the beam indication method is simple, but the UE cannot receive data on other beams effectively
Solution Approach 1:
The patent segments the receive beam configuration by introducing multiple TCI states (first TCI state and second TCI state) that can be simultaneously activated. Each TCI state corresponds to different reference signal resources, allowing the UE to maintain multiple receive beam configurations rather than relying on a single beam, thus improving data reception reliability across multiple beams.
Solution Approach 2:
The patent applies preliminary action by pre-configuring multiple TCI states and their associated reference signal resources before data transmission. The network device activates multiple TCI states in advance, enabling the UE to have multiple receive beam configurations ready before receiving data on different beams, thereby ensuring reliable reception without real-time beam switching complexity.
2Device complexity
If the UE uses only one receive beam, then the beam configuration is simple, but the performance of receiving data on other beams is poor
Solution Approach 1:
The patent implements multi-functionality by enabling the UE to simultaneously maintain multiple receive beam configurations through multiple activated TCI states. Each TCI state can be used for receiving data on different beams, making the receive beam system universal rather than single-purpose, thereby improving data reception performance across multiple beams without excessive complexity.
3Reliability
If multiple TCI states are activated for simultaneous beam communication, then the data reception probability increases, but the beam management complexity increases
Solution Approach 1:
The patent introduces the TCI state as an intermediary that simplifies beam management. Instead of directly managing multiple complex beam configurations, the network device uses TCI states as mediators to activate and manage multiple reference signal resources. This intermediary layer abstracts the complexity, allowing multiple beams to be managed systematically through standardized TCI state activation and release procedures.
Data Source
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AI summary
This application provides a reference signal transmission method, including: determining at least two first reference signal resources; receiving a first channel based on the at least two first reference signal resources when a scheduling offset is less than or equal to a preset threshold and/or there is no spatial relation parameter information indication field in downlink control information DCI; and demodulating the first channel. When data on at least two reference signal resources needs to be received within a period of time, the method can increase a probability that a terminal device successfully receives the data.a