Decoupled UL DL Beam Path Selection for Radiation Exposure
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR, face challenges due to line of sight requirements that can lead to radiation exposure issues when user equipment (UE) is within the uplink/downlink (UL/DL) beam path, necessitating improvements in beam management to avoid interference and ensure safe radiation exposure.
Innovation Solution
The system allows for decoupling of UL and DL beams by enabling the user equipment (UE) to determine and indicate a preferred beam path to the base station, which can differ from the initial beam path, thereby avoiding interference and reducing radiation exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the UE uses the same DL beam for both uplink and downlink communication, then the communication process is simplified, but radiation exposure increases and interference occurs when the UE is within the beam path
Solution Approach 1:
The patent segments the uplink and downlink beam paths by introducing separate beam identification mechanisms. The UE determines a preferred DL beam independently from the UL beam used for communication, allowing the two directions to use different spatial paths. This segmentation reduces radiation exposure and interference while maintaining communication efficiency.
2Object-affected harmful factors
If the UE indicates a preferred DL beam different from the current beam, then radiation exposure is reduced, but the beam management procedure becomes more complex
Solution Approach 1:
The patent implements preliminary action by having the UE determine and indicate its preferred DL beam in advance, before actual data transmission begins. The base station receives this indication and prepares the preferred beam for downlink communication, avoiding the need for complex real-time beam switching during active communication.
Solution Approach 2:
The patent uses feedback mechanisms where the UE provides information about its preferred DL beam to the base station. This feedback loop allows the system to adapt beam selection based on UE position and radiation exposure considerations, simplifying the overall management by using structured information exchange rather than complex real-time control.
3Reliability
If the system maintains strict line of sight requirements for beam alignment, then communication reliability is improved, but radiation exposure and interference increase
Solution Approach 1:
The patent resolves the contradiction by transitioning from a single-dimension beam alignment approach to a multi-dimensional solution. It separates the spatial dimension into independent uplink and downlink beam paths, allowing the system to maintain reliable communication through structured beam management while reducing interference through spatial decoupling of transmit and receive paths.
Data Source
AI summary
Methods, apparatuses, and computer-readable mediums for wireless communication are disclosed by the present disclosure. In an example, a user equipment (UE) communicates with a base station on different uplink (UL) and downlink (DL) beam paths. In the example, the UE may indicate to the base station a preferred beam path to use. The UE may indicate the preferred beam path in response to an explicit request from the base station or without an explicit request. The use of different UL/DL beam paths allow beam paths which avoid interference from a user of the UE to be used.