5G Terminal Frequency Resource Allocation Scaling
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Solution Overview
Problem
In 5G communication systems, the limited number of downlink control information (DCI) formats and control channel elements (CCEs) can lead to insufficient blind-decoding of the physical downlink control channel (PDCCH), especially when the bandwidth part sizes differ between the initial and activated bandwidths, causing scheduling limitations.
Innovation Solution
A method and apparatus that apply a scaling factor based on the first and second bandwidths to identify allocated resources for data transmission or reception, ensuring efficient frequency domain resource allocation even when the initial and activated bandwidths differ, thereby optimizing resource utilization and scheduling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the number of DCI formats and CCEs is limited, then the system complexity is reduced, but the blind-decoding capability becomes insufficient
Solution Approach 1:
The patent introduces dynamic scaling factors that adjust the frequency domain resource allocation based on the ratio between initial bandwidth part size and activated bandwidth part size. This dynamic adjustment mechanism allows the system to adapt resource allocation to different bandwidth configurations without increasing the number of DCI formats or CCEs, thereby maintaining system complexity while improving blind-decoding capability across varying bandwidth conditions.
Solution Approach 2:
The patent changes the parameter of frequency domain resource allocation by applying scaling factors derived from bandwidth part size ratios. This parameter transformation enables the same limited set of DCI formats to effectively represent a wider range of resource allocations, resolving the contradiction between limited system complexity and sufficient blind-decoding capability.
2Adaptability or versatility
If the bandwidth part size differs between initial and activated bandwidth, then the system adaptability is improved, but the scheduling capability becomes limited
Solution Approach 1:
The patent transforms the resource allocation parameters by applying scaling factors that account for bandwidth part size differences. This parameter transformation allows the system to maintain effective scheduling capability across different bandwidth configurations without requiring separate DCI formats for each bandwidth scenario, thus preserving productivity while achieving bandwidth adaptability.
Solution Approach 2:
The scaling factor mechanism serves as a universal solution that works across different bandwidth part configurations. Instead of creating specialized scheduling mechanisms for each bandwidth scenario, the patent uses a single scalable approach that adapts to various bandwidth conditions, maintaining scheduling capability while achieving multi-functional adaptability.
3Adaptability or versatility
If multiple search space sets are monitored, then the resource selection capability is improved, but the blind-decoding limit condition fails
Solution Approach 1:
The patent applies scaling factors to transform frequency domain resource allocation parameters, which reduces the effective number of distinct resource allocations that need to be blindly decoded. This parameter transformation allows the system to monitor multiple search space sets with improved resource selection capability while keeping the actual blind-decoding burden within acceptable limits by reducing redundancy in the search space.
Data Source
AI summary
A communication method and system for converging a 5G communication system for supporting higher data rates beyond a 4G system with a technology for Internet of Things (IoT) is disclosed. A method of a terminal in a wireless communication system is provided. The method includes receiving downlink control information (DCI) including frequency domain resource allocation information on a physical downlink control channel (PDCCH) from a base station, identifying an allocated resource for transmitting or receiving data based on the frequency domain resource allocation information, and transmitting or receiving the data on the allocated resource. When the frequency domain resource allocation information is based on a first bandwidth part of a first bandwidth and the DCI is for a second bandwidth part corresponding to a second bandwidth, the allocated resource is identified by applying a scaling factor based on the first bandwidth and the second bandwidth.