Dynamic ePDCCH Detection via RRC Configuration
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Solution Overview
Problem
The existing downlink control information mapping mode in LTE systems leads to resource waste and increased scheduling blocking rates due to fixed blind detection methods, which restrict the expansion of the search space and result in incorrect decoding of downlink control information.
Innovation Solution
A method where the UE detects downlink control information based on a resource block set and pre-defined information configured by the base station, allowing for agile detection and efficient resource allocation, thereby improving scheduling efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If fixed blind detection method is used for downlink control information, then detection process is simple, but resource waste increases and scheduling blocking rate increases
Solution Approach 1:
The patent applies dynamics by transitioning from fixed blind detection to dynamic detection based on RRC configuration. The UE adapts its detection behavior according to configured parameters including search space sets, aggregation levels, and DCI formats, allowing the detection process to adjust to varying channel conditions and traffic requirements while reducing unnecessary resource consumption.
Solution Approach 2:
The patent implements parameter changes by configuring multiple detection parameters through RRC signaling, including search space set identifiers, aggregation levels (1, 2, 4, 8), DCI format types, and candidate set quantities. These configurable parameters enable flexible adjustment of detection characteristics to optimize resource utilization while maintaining detection accuracy.
2Ease of operation
If fixed blind detection method is used for downlink control information, then detection process is simple, but scheduling blocking rate increases
Solution Approach 1:
The patent applies dynamics by transitioning from fixed blind detection to dynamic detection based on RRC configuration. The UE adapts its detection behavior according to configured parameters including search space sets, aggregation levels, and DCI formats, allowing the detection process to adjust to varying channel conditions and traffic requirements while reducing unnecessary resource consumption.
Solution Approach 2:
The patent implements parameter changes by configuring multiple detection parameters through RRC signaling, including search space set identifiers, aggregation levels (1, 2, 4, 8), DCI format types, and candidate set quantities. These configurable parameters enable flexible adjustment of detection characteristics to optimize resource utilization while maintaining detection accuracy.
3Reliability
If search space is expanded to reduce blocking rate, then more resources are used, but resource waste increases
Solution Approach 1:
The patent applies segmentation by dividing the search space into multiple search space sets, each with specific aggregation levels and candidate quantities. This segmentation allows the system to distribute detection candidates across different resource configurations, expanding the effective search space while maintaining efficient resource utilization through structured organization of detection parameters.
Solution Approach 2:
The patent implements universality by creating a multi-functional detection framework where a single RRC configuration can define multiple search space sets with different characteristics. This allows the same configuration mechanism to serve various detection scenarios (different aggregation levels, different DCI formats, different candidate quantities) without requiring separate dedicated configurations for each case.
Data Source
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AI summary
A method for transmitting downlink control information, a detecting method, a base station and a UE are provided in the present invention. The detecting method includes: the UE detects downlink control information beared by ePDCCH in a resource block according to a resource block set and pre-defined information configured by the base station; wherein the pre-defined information at least includes one of the followings: sub-carrier position information detected in the resource block set, enhanced control channel unit information detected in the resource block set, a mapping mode of the ePDCCH, aggregation level configuration information detected in the resource block set, the amount of candidate set corresponding to the detected aggregation level in the resource block set and a downlink control information format. In the present invention, the UE is agilely indicated to detected the downlink control information beared by the ePDCCH in the corresponding physical resource block according to the configured resource block set and the pre-defined information, so as to save resources of space detected and searched by the UE, thus scheduling efficient of the system is improved.