Cell-Group Slot Format Indication for Wireless Full Duplex
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Solution Overview
Problem
Current wireless communication systems face challenges in managing interference and optimizing slot formats across multiple cells in cross-cell communication, leading to increased overhead and reduced efficiency in full duplex operations.
Innovation Solution
The implementation of cell-group slot format indication (SFI) allows for dynamic cross-cell operation by transmitting configuration information and slot format combinations to user equipment (UE), enabling efficient slot format management across cells within a group, thereby reducing overhead and maintaining consistent bandwidth usage regardless of the number of cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If individual slot format indication is transmitted for each cell in cross-cell communication, then slot format management precision is improved, but signaling overhead increases linearly with the number of cells
Solution Approach 1:
The patent merges slot format indication for multiple cells into a single cell-group SFI message. Instead of transmitting separate SFI information for each cell, the base station groups multiple cells together and transmits a unified slot format indication that applies to all cells in the group, thereby reducing signaling overhead while maintaining slot format management capability
Solution Approach 2:
The cell-group SFI mechanism provides universal slot format indication that can be applied across multiple cells simultaneously. A single SFI message serves multiple cells, making the signaling mechanism multi-functional and eliminating the need for separate individual cell signaling
2Productivity
If dynamic slot format adjustment is implemented across multiple cells to optimize full duplex operation, then communication efficiency is improved, but system complexity increases
Solution Approach 1:
The patent segments cells into distinct cell-groups for slot format management. Each cell-group is assigned a specific slot format configuration, allowing dynamic optimization of full duplex operation within each group while maintaining manageable system complexity through organized segmentation rather than uncontrolled individual cell management
Solution Approach 2:
The system implements dynamic slot format adjustment where cell-group SFI can be updated to change slot formats across multiple cells in response to varying traffic conditions and interference scenarios, optimizing communication efficiency while maintaining flexibility through standardized dynamic reconfiguration procedures
3Loss of time
If slot format indication is transmitted frequently to maintain up-to-date slot format information, then slot format information freshness is improved, but bandwidth consumption increases
Solution Approach 1:
By merging slot format indications for multiple cells into a single cell-group SFI message, the patent reduces the total number of signaling transmissions required. This consolidation maintains slot format information freshness across all grouped cells while significantly reducing bandwidth consumption compared to individual cell signaling
Data Source
AI summary
Systems, methods, and devices for wireless communication that support cell-group slot format indication (SFI) facilitating dynamic cross-cell operation are described. Cell-group SFI information of some examples supports full duplex operation implemented using cross-cell communication techniques. Devices may be provided with information regarding cell-groups and information regarding cell slot formats for cells in the cell-groups. For example, cell-group SFI may be provided for switching slot (symbol) types across cells for a number of slots, wherein a base station may define a cell-group and a cell-group SFI applies to cells within the cell-group. Cell-group SFI information may indicate cell slot formats for each cell of a selected cell-group to provide a device with slot formats used with respect to the cells of the cell-group. Other aspects and features are also claimed and described.