Evanescent Cell Beam Groups for Sub-THz Idle Mode Management
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Solution Overview
Problem
The challenge in wireless communication systems, particularly in sub-THz bands, is the inefficient management of highly directional beams, leading to unnecessary signaling overhead and potential communication issues.
Innovation Solution
The introduction of Evanescent Cells (ECs) and Beam-Groups (BGs), which are WTRU-centric and utilize highly directional transmissions, enabling efficient cell management through detection, deactivation, activation, selection, reselection, and augmentation, along with hierarchical system information acquisition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If highly directional beams are used in sub-THz bands, then communication directionality and focus are improved, but signaling overhead and system complexity increase
Solution Approach 1:
The patent segments the cell into multiple beam groups (BGs), each associated with specific beams from one or more base stations. This segmentation allows the system to manage highly directional beams in sub-THz bands by organizing them into manageable groups, reducing signaling overhead while maintaining communication directionality and focus.
Solution Approach 2:
The patent introduces dynamic mechanisms for beam group activation, deactivation, selection, and reselection based on WTRU presence and communication needs. This dynamic approach allows the system to adapt the beam configuration in real-time, reducing signaling overhead when beams are not needed while maintaining reliability when communication is required.
2Device complexity
If beam groups are dynamically managed, then signaling overhead is reduced, but detection and measurement complexity increases
Solution Approach 1:
The patent implements self-service mechanisms where the network autonomously determines WTRU presence and manages beam group activation without requiring explicit WTRU requests. The network detects WTRU presence using reference signals and automatically activates or deactivates appropriate beam groups, reducing signaling overhead while simplifying the detection process through network-initiated measurements.
Solution Approach 2:
The patent performs preliminary actions by pre-configuring multiple beam groups with their associated beams and communication parameters before WTRU arrival. When WTRU presence is detected, the system can quickly activate the appropriate pre-configured beam groups without requiring complex real-time configuration, thereby reducing detection and measurement complexity.
3Productivity
If WTRU-centric cell management is implemented, then communication efficiency is improved, but system information acquisition complexity increases
Solution Approach 1:
The patent segments system information into beam group-specific information and cell-level information. Each beam group has associated system information that can be acquired independently, allowing WTRU-centric cell management to proceed with reduced complexity by focusing information acquisition only on relevant beam groups rather than the entire cell.
Solution Approach 2:
The patent implements dynamic system information acquisition where the network determines which beam groups are active and provides system information accordingly. This dynamic approach allows the system to provide detailed beam group information only when needed, reducing the overall complexity of system information acquisition while maintaining communication efficiency.
Data Source
AI summary
An Evanescent Cell (EC) refers to a WTRU-centric cell exploiting highly directional transmissions. An EC may comprise one or more beams from one or more BSs/gNBs/TRPs that may be operated by the same or different operators. An EC may be created utilizing knowledge of radio planning having detected the presence of one or more WTRU. A Beam-Group (BG) refers to a group of beams associated with an EC. All beams associated with an EC may be categorized into multiple BGs. Each BG may be made up of one or more beams from multiple BSs/gNBs/TRPs. Multiple BGs within an EC may be enabled to ease the burden of cell management. In one or more embodiments, there may be systems, procedures, and/or devices for EC/BG detection, deactivation, activation, selection, reselection, and augmentation. Further, there may be one or more embodiments for hierarchical system information acquisition as they relate to ECs/BGs.