PDCCH Search-Space Segmentation for Dynamic PUCCH Resources
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing and optimizing the reception and transmission of control channels and shared channels, particularly in high-frequency bands, which affect the performance and efficiency of 5G and beyond systems.
Innovation Solution
The method involves configuring and managing multiple search spaces with different control channel element aggregation levels to determine physical uplink control channel resources and perform rate matching on physical downlink shared channels based on these configurations, ensuring efficient resource allocation and transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple search spaces with different aggregation levels are configured for PDCCH reception, then control channel reliability is improved, but device complexity increases
Solution Approach 1:
The patent segments the control channel reception process into multiple search spaces (first search space and second search space) with different aggregation levels. The terminal device separately manages PDCCH candidates in each search space, allowing reliable control information reception through diversified search paths while organizing complexity through structured segmentation.
Solution Approach 2:
The patent implements dynamic determination of PUCCH resources based on the aggregation level of successfully received PDCCH candidates. When a PDCCH candidate with aggregation level 16 is received, one PUCCH resource is determined; when aggregation level 8 is received, another PUCCH resource is determined. This dynamic adaptation optimizes uplink control channel resources based on downlink control channel conditions.
2Productivity
If PUCCH resources are determined based on PDCCH aggregation level, then uplink control channel efficiency is improved, but processing complexity increases
Solution Approach 1:
The patent changes the parameter used for PUCCH resource determination from fixed configuration to dynamic selection based on PDCCH aggregation level. The terminal device selects different PUCCH resources (first PUCCH resource or second PUCCH resource) depending on whether the received PDCCH candidate has aggregation level 16 or 8, optimizing uplink control efficiency through parameter adaptation.
3Productivity
If rate matching is performed on PDSCH based on PDCCH search space configuration, then resource allocation efficiency is improved, but processing time increases
Solution Approach 1:
The patent performs rate matching on PDSCH based on pre-configured search space information and predetermined aggregation levels. By using previously configured search space parameters and predetermined aggregation level mappings, the terminal device can perform rate matching without extensive real-time calculations, reducing processing time while maintaining resource allocation efficiency.
Data Source
AI summary
An apparatus and method are provided for receiving and transmitting signals/channels in a wireless communication system. A method performed by a terminal includes receiving configuration information on a first SS set and a second SS set, wherein the first SS set with a first index includes a first PDCCH candidate having a CCE AL 8 and a third PDCCH candidate having a CCE AL 16, and the second SS set with a second index includes a second PDCCH candidate having the CCE AL 8 and a fourth PDCCH candidate having the CCE AL 16; receiving a PDCCH based on the configuration information; determining a PUCCH resource based on an index of a first CCE for the PDCCH, wherein the index of the first CCE is determined based on a CCE AL of a PDCCH candidate associated with the second SS set with the second index which is smaller than the first index; and transmitting a PUCCH based on the PUCCH resource.