Terminal And Base Station BWP Scheduling for Lower Overhead
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Solution Overview
Problem
Conventional carrier aggregation in wireless communication systems results in high resource allocation overhead due to the necessity of scheduling data resources for each of the bundled component carriers.
Innovation Solution
Implementing a method where resource allocation is performed with a granularity different from that of the component carriers, utilizing a virtual CC unit, BWP unit, PRB unit, or PRB set unit, and configuring time domain resource allocation separately for each bandwidth part or the entire virtual CC.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If carrier aggregation is used to allocate wide band data resources by bundling multiple component carriers, then data transmission capacity is improved, but resource allocation overhead increases due to the necessity of scheduling data resources for each component carrier
Solution Approach 1:
The patent segments the frequency band into multiple bandwidth parts (BWPs), each BWP containing multiple physical resource blocks (PRBs). This segmentation allows independent resource allocation within each BWP, reducing the overhead of scheduling across the entire aggregated band while maintaining the capacity benefits of carrier aggregation.
Solution Approach 2:
The patent introduces a new dimension of resource allocation by organizing resources in a hierarchical structure: aggregated carriers → bandwidth parts (BWPs) → physical resource blocks (PRBs). This multi-dimensional organization allows flexible scheduling at different granularities, reducing overhead by enabling coarser-grained allocation at the BWP level while preserving fine-grained control at the PRB level.
2Adaptability or versatility
If scheduling is performed for each component carrier in carrier aggregation, then resource allocation flexibility is improved, but signaling overhead increases
Solution Approach 1:
The patent merges multiple component carriers into bandwidth parts (BWPs) as intermediate allocation units. This merging reduces the number of individual scheduling decisions required while maintaining flexibility through the ability to independently configure and schedule each BWP. The consolidation reduces signaling overhead by grouping carriers that can be scheduled together.
Solution Approach 2:
The patent enables dynamic switching between different bandwidth parts and flexible configuration of BWP boundaries. This dynamic approach allows the system to adapt resource allocation granularity to traffic conditions, using coarser-grained BWP-level scheduling when possible to reduce overhead, while maintaining the ability to perform finer-grained scheduling when flexibility is required.
Data Source
AI summary
A terminal includes: a communication unit configured to perform an uplink or downlink communication by using a frequency band in which aggregation is performed by carrier aggregation; and a control unit configured to expect, in a case where scheduling is performed by using a unit including a plurality of component carriers, that a time domain resource allocation is to be configured for each component carrier among the plurality of component carriers or for each unit including a plurality of component carriers in the aggregated frequency band.