Single Beam Selection for High Pathloss Wireless Devices
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Solution Overview
Problem
Wireless communication systems face challenges in efficiently managing beam direction selection, particularly in high pathloss mode operations where signal attenuation is significant, especially in millimeter wave frequency ranges.
Innovation Solution
The method involves a wireless device selecting a set of communication candidates based on a high pathloss mode, where the selected devices have an angular separation less than a threshold, and communicating with them using a single communication beam, thereby optimizing beam usage and reducing pathloss effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple communication beams are used to communicate with multiple wireless devices, then communication reliability is improved, but device complexity increases due to multiple RF chains
Solution Approach 1:
The patent merges multiple communication beams into a single communication beam by selecting multiple wireless devices with small angular separations and communicating with them simultaneously using one beam, thereby reducing the number of RF chains needed while maintaining communication reliability
2Productivity
If angular separation threshold is reduced to select more communication candidates, then productivity is improved, but signal quality deteriorates due to increased pathloss
Solution Approach 1:
The patent changes the angular separation threshold parameter based on the high pathloss mode operation, selecting devices with specifically small angular separations (less than the threshold) to enable single-beam communication while mitigating pathloss effects through coherent signal combining
3Device complexity
If single communication beam is used to communicate with multiple devices, then device complexity is reduced, but measurement precision deteriorates due to angular separation requirements
Solution Approach 1:
The patent applies local quality by focusing the single communication beam on a specific local region where multiple devices are located with small angular separations, enabling precise targeted communication while reducing overall system complexity
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. The described techniques enable a first wireless device (e.g., an integrated access and backhaul (IAB) node in an TAB system) or a network entity (e.g., a centralized unit (CU) in the TAB system) to select a set of wireless devices for communication. The first wireless device, the CU, or both may select the set of wireless devices for communication based on a pathloss mode of the first wireless device, whether an angular separation between a group of nodes (e.g., one or more of the set of wireless devices) is less than an angular separation threshold, or both. The first wireless device may communicate with the set of wireless devices with one or more communications beams. For example, the device may communicate with multiple wireless devices using a single communication beam if the angular separation between the multiple devices is relatively low.