PDCCH REG Bundling for CORESET Resource Alignment
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Solution Overview
Problem
In wireless communication systems, particularly in 3GPP LTE/LTE-A, the existing methods for transmitting and receiving downlink control channel signals face inefficiencies due to residual resources and mismatched REG bundle grids between CORESETs, leading to inaccurate channel estimation and increased blocking probabilities.
Innovation Solution
The method involves configuring a physical downlink control channel (PDCCH) signal by bundling resource element groups (REGs) into 1 REG bundle every 2, 3, or 6 REGs, using a bitmap for frequency resource allocation in units of 6-RBs, ensuring no residual resources are left and optimizing resource usage, and aligning REG bundle boundaries between overlapping CORESETs to minimize blocking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If REG bundles are configured without aligning boundaries between overlapping CORESETs, then resource allocation is simpler, but blocking probability increases and resource utilization decreases
Solution Approach 1:
The patent segments the frequency resources into discrete REG bundles with standardized sizes (2, 3, or 6 REGs per bundle). By dividing the CORESET frequency resources into aligned REG bundle units, the system achieves systematic resource allocation that prevents residual resources and enables efficient utilization across overlapping CORESETs, directly resolving the contradiction between resource utilization and configuration complexity
Solution Approach 2:
The patent introduces configurable parameters for REG bundle size (2, 3, or 6 REGs per bundle) and establishes alignment rules for REG bundle boundaries across overlapping CORESETs. These parameter changes enable flexible yet standardized resource allocation, improving resource utilization while maintaining manageable configuration complexity through defined parameters
2Loss of energy
If frequency resources are allocated without using bitmap in units of 6-RB, then configuration flexibility is higher, but residual resources remain causing wasted bandwidth
Solution Approach 1:
The patent segments frequency resources into standardized 6-RB units for bitmap allocation. This segmentation ensures that resource allocation is performed in discrete, manageable blocks that align with REG bundle structures, eliminating residual resources and preventing bandwidth waste while maintaining clear and systematic allocation rules
Solution Approach 2:
The patent uses bitmap representation to copy and replicate the same allocation pattern across multiple 6-RB units. This copying mechanism allows efficient resource allocation description without manually configuring each resource block, reducing configuration complexity while ensuring complete resource utilization without residuals
Data Source
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AI summary
According to an embodiment of this invention, a method of receiving a downlink signal by a user equipment (UE) in a wireless communication system includes receiving a first control resource set (CORESET) configuration including information regarding a frequency resource of a first CORESET, and receiving a physical downlink control channel (PDCCH) signal by bundling a plurality of resource element groups (REGs) on the first CORESET, wherein the information regarding the frequency resource of the first CORESET may be a bitmap, and wherein the bitmap may allocate the frequency resource of the first CORESET in units of 6-RB such that a residual resource that does not belong to any REG bundle is not present in the first CORESET after every 2, 3, or 6 REGs are bundled into 1 REG bundle.