Terminal Bandwidth Part Resource Assignment
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Solution Overview
Problem
Current communication systems, particularly in the context of LTE and next-generation mobile communication standards like NR, face challenges in efficiently managing multiple carrier bandwidths for efficient communication between terminal apparatuses and base station apparatuses, especially in terms of resource allocation and scheduling.
Innovation Solution
The implementation of a communication method that utilizes a combination of first and second downlink carrier bandwidth parts, where the terminal apparatus and base station apparatus monitor and transmit PDCCH and PDSCH signals, with DCI formats including frequency domain resource assignment information based on the number of resource blocks in the second downlink carrier bandwidth part, enabling efficient communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the frequency domain resource assignment information size is determined based on the first downlink carrier bandwidth part (active carrier), then the resource allocation accuracy for current data transmission is improved, but the control signal overhead increases when switching between different bandwidth parts
Solution Approach 1:
The patent applies preliminary action by pre-configuring the second downlink carrier bandwidth part with its resource block information in advance (through MIB or system information). This allows the terminal to have the bandwidth part configuration ready before actual data transmission, enabling quick switching between bandwidth parts without recalculating resource assignment information size, thus reducing control signal overhead while maintaining allocation accuracy.
Solution Approach 2:
The patent introduces the second downlink carrier bandwidth part as an intermediary reference. Instead of directly using the active carrier's bandwidth for all calculations, the resource assignment information size is determined based on this intermediary bandwidth part configuration. This intermediary structure facilitates efficient resource management and reduces the information overhead needed for bandwidth part switching.
2Adaptability or versatility
If multiple downlink carrier bandwidth parts are configured for bandwidth part switching, then the system adaptability and resource management flexibility are improved, but the terminal apparatus complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the downlink carrier into multiple bandwidth parts (first and second bandwidth parts), each with its own resource block configuration. This segmentation allows the terminal to switch between different bandwidth parts based on traffic requirements, improving system adaptability while managing complexity through structured division of the frequency spectrum into manageable segments.
Solution Approach 2:
The patent implements universality by designing the DCI format to universally handle resource assignment across different bandwidth parts. The same DCI structure and resource assignment mechanism work for both the first and second bandwidth parts, allowing the terminal apparatus to manage multiple bandwidth parts using a unified approach, thereby reducing terminal complexity despite the multi-bandwidth capability.
3Productivity
If the DCI format uses a fixed resource assignment information size, then the control signal processing efficiency is improved, but the resource allocation flexibility across different bandwidth parts deteriorates
Solution Approach 1:
The patent applies parameter changes by making the DCI format's resource assignment information size dynamic rather than fixed. The size parameter is adjusted based on the specific bandwidth part being used (first or second downlink carrier bandwidth part). This allows the system to maintain high processing efficiency by using compact DCI formats while preserving allocation flexibility by adapting the information size to match the actual bandwidth part configuration, avoiding unnecessary overhead.
Data Source
AI summary
A terminal apparatus that communicates with a base station apparatus by using a cell including a first downlink carrier bandwidth part and a second downlink carrier bandwidth part includes a receiver configured to monitor a PDCCH in the first downlink carrier bandwidth part and a decoder configured to decode a PDSCH in the first downlink carrier bandwidth part based on a DCI format included in the PDCCH. The DCI format includes frequency domain resource assignment information of the PDSCH, and a size of the frequency resource assignment information is given at least based on the number of resource blocks included in the second downlink carrier bandwidth part.