Bandwidth Part Specific Scheduling Configuration for Wireless Signaling
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Solution Overview
Problem
Current wireless communication systems face challenges in reducing signaling overhead in primary cells when activating secondary cells, particularly due to the need for cross-carrier scheduling across multiple bandwidth parts, which increases latency and energy consumption.
Innovation Solution
Implementing bandwidth part (BWP) specific configurations that enable or disable cross-carrier scheduling on a per-BWP basis, allowing secondary cells to self-schedule transmissions and reducing the signaling burden on primary cells, through the introduction of new Information Elements (IEs) in RRC signaling messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If cross-carrier scheduling is enabled for all bandwidth parts in secondary cells, then scheduling flexibility is improved, but signaling overhead in primary cells increases
Solution Approach 1:
The patent segments the cross-carrier scheduling configuration by introducing BWP-specific indication information, allowing different bandwidth parts to have different cross-carrier scheduling configurations. This segmentation enables the system to apply cross-carrier scheduling only where necessary rather than uniformly across all BWPs, thus reducing overall signaling overhead while maintaining scheduling flexibility where needed.
Solution Approach 2:
The patent applies local quality by allowing specific bandwidth parts to have cross-carrier scheduling enabled or disabled based on individual needs. The BWP-specific indication information provides localized control, enabling the system to optimize signaling overhead for each BWP independently rather than applying a blanket configuration system-wide.
2Adaptability or versatility
If cross-carrier scheduling is configured for multiple bandwidth parts, then scheduling capability is improved, but activation latency increases
Solution Approach 1:
The patent implements preliminary action by pre-configuring BWP-specific cross-carrier scheduling indication information in the RRC signaling message during initial setup. This allows the mobile device to have scheduling capabilities ready in advance for specific bandwidth parts without requiring lengthy configuration processes during activation, thereby reducing activation latency while maintaining scheduling capability.
3Measurement precision
If comprehensive scheduling configuration is provided for all cells, then scheduling precision is improved, but energy consumption increases
Solution Approach 1:
The patent extracts the cross-carrier scheduling indication information from a blanket all-cell configuration approach and places it specifically only where needed through BWP-specific indication. This extraction eliminates unnecessary scheduling configurations for bandwidth parts that don't require cross-carrier scheduling, reducing the processing burden and energy consumption while maintaining scheduling precision for the relevant BWPs.
Data Source
AI summary
Methods, apparatus, and systems for reducing signaling overhead in a primary while supporting fast activation of one or more secondary cells are described. In one example aspect, a wireless communication method includes receiving, by a mobile device, a signaling message from a base station for configuring a primary cell and at least one secondary cell. The secondary cell is configured with at least one bandwidth part and the signaling message includes a first information element associated with the bandwidth part. The first information element further includes a second information element for enabling or disabling cross-carrier scheduling for the bandwidth part. The method also includes performing, by the mobile device, blind decoding to obtain scheduling information with respect to the bandwidth part based on whether the cross-carrier scheduling for the bandwidth part is enabled or disabled.