Multi-Bandwidth Part Access for Wireless Cell Capacity Balancing
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Solution Overview
Problem
In wireless communication networks, the limitation of using a single bandwidth part (BWP) for wireless devices accessing or camping on a cell, especially in non-terrestrial networks, leads to bottlenecks and reduced system capacity due to uneven distribution of loading, complicating data channel transmission and mobility management.
Innovation Solution
A radio network node informs wireless devices about multiple bandwidth parts and synchronization signal blocks of a cell, allowing devices to select from these options for accessing or camping, thereby distributing loading across multiple BWPs to alleviate bottlenecks and increase system capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If all wireless devices access and camp on the cell using the same BWP, then initial access is simplified, but system capacity is limited due to bottlenecking
Solution Approach 1:
The patent segments the single BWP access method into multiple BWPs, where different wireless devices can access and camp on different BWPs simultaneously. This segmentation divides the access bottleneck into multiple parallel access paths, thereby increasing system capacity while maintaining access simplicity for individual devices.
Solution Approach 2:
The patent introduces a new dimension of BWP selection for initial access, moving from a single-dimension approach (one BWP for all devices) to a multi-dimensional approach (multiple BWPs available). This dimensional expansion allows devices to be distributed across different BWPs, increasing system capacity without complicating the access procedure for individual devices.
2Productivity
If multiple BWPs are made available for initial access, then system capacity increases by distributing loading, but device complexity increases due to BWP selection requirements
Solution Approach 1:
The patent implements self-service by enabling wireless devices to autonomously select appropriate BWPs for initial access based on their own requirements and the available options. The network provides BWP configuration information, and devices independently make selection decisions, which distributes the selection logic across devices rather than requiring complex centralized control, thereby increasing system capacity without proportionally increasing overall system complexity.
3Adaptability or versatility
If SSBs are flexibly positioned within BWPs, then adaptive frequency reuse planning is enabled, but data channel transmission complexity increases due to rate matching requirements
Solution Approach 1:
The patent applies parameter changes by allowing flexible positioning of SSBs within BWPs and adjusting data channel transmission parameters accordingly through rate matching. This enables adaptive frequency reuse planning where SSB positions can be optimized for different scenarios, and the data channel parameters are dynamically adjusted to accommodate these positions, achieving adaptability while managing complexity through standardized parameter adjustment mechanisms.
Data Source
AI summary
A wireless device (18) is configured for use in a wireless communication network (10). The wireless device (18) receives broadcasted system information (20) for a cell (14). The broadcasted system information (20) indicates multiple bandwidth parts (16-1, 16-2 . . . 16-N) of the cell (14), where the multiple bandwidth parts (16-1, 16-2, . . . 16-N) indicated are either multiple downlink bandwidth parts or multiple uplink bandwidth parts. Alternatively or additionally, the broadcasted system information (20) indicates respective frequency positions of multiple synchronization signal blocks, SSBs, for the cell (14).