DCI Format Size Segmentation for Resource Allocation Adaptability
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Solution Overview
Problem
Current communication systems, such as LTE and emerging New Radio (NR) standards, face challenges in efficiently managing multiple Downlink Control Information (DCI) formats within a serving cell, particularly when the number of DCI formats exceeds three, which affects resource allocation and scheduling in cellular networks.
Innovation Solution
The implementation of a terminal apparatus and base station apparatus that configure and manage distinct sets of downlink resource blocks in the frequency domain, with a higher layer processing unit and transmitter/receiver configured to handle multiple DCI formats using a Common-Radio Network Temporary Identifier (C-RNTI), allowing for dynamic frequency domain resource allocation based on the number of resource blocks, thereby optimizing resource scheduling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple DCI formats are monitored using C-RNTI in the serving cell, then the adaptability and versatility of resource allocation is improved, but the device complexity and difficulty of detecting and measuring increases when the number of DCI format sizes exceeds three
Solution Approach 1:
The patent segments DCI format sizes into two distinct groups: sizes 0, 1, and 2 form one group, while size 3 forms another group. This segmentation allows the terminal to manage multiple DCI formats more efficiently by treating them as discrete categories rather than individual formats, reducing the complexity of monitoring and detecting DCI formats when the number exceeds three.
Solution Approach 2:
The patent changes the parameter of DCI format size classification from individual format identification to grouped size classification. By changing how DCI formats are parameterized and categorized, the system can handle multiple formats with fewer distinct states, thereby reducing device complexity while maintaining adaptability in resource allocation.
2Adaptability or versatility
If multiple DCI formats with different sizes are monitored, then the versatility of scheduling is improved, but the difficulty of detecting and measuring increases
Solution Approach 1:
The patent divides DCI format sizes into segmented groups (sizes 0-2 and size 3) to simplify the detection process. Instead of detecting and managing each DCI format size individually, the terminal detects grouped size information, which reduces the computational complexity and difficulty of measuring DCI formats while preserving scheduling versatility.
Solution Approach 2:
The patent transforms the detection parameter from specific DCI format size identification to grouped size category identification. This parameter change reduces the search space and measurement complexity for the terminal while maintaining the ability to schedule resources with multiple DCI formats of different sizes.
3Productivity
If resource blocks are allocated dynamically based on the number of resource blocks in the second set, then the productivity of resource allocation is improved, but the device complexity increases
Solution Approach 1:
The patent changes the configuration parameter from individual resource block allocation to allocation based on the count of resource blocks in the second set. This parameter transformation enables more efficient and flexible resource allocation while reducing the complexity of managing individual resource block configurations, as the system only needs to track the number of resource blocks rather than their detailed arrangement.
Data Source
AI summary
A terminal apparatus includes: a higher layer processing unit configured to configure, in the serving cell, the first set of downlink resource blocks (DL RBs) continuous in a frequency domain and the second set, which is different from the first set, of DL RBs continuous in the frequency domain; and a receiver configured to monitor a first PDCCH with a first DCI format in the first set, the first set being activated, and receive a PDSCH scheduled according to the first DCI format in the first set, wherein in a case that the number of different sizes of DCI formats monitored by using a C-RNTI in the serving cell exceeds three, a size of a first frequency domain resource allocation field included in the first DCI format is provided based on the number of the RBs in the second set, and the first frequency domain resource allocation field is used for scheduling the RBs in the first set.