Enhanced PDCCH Blind Detection Candidate Sets
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The capacity and transmission efficiency of downlink control channels in LTE-A systems are limited, and existing PDCCH technologies have not benefited from advancements like MU-MIMO and CoMP, necessitating an improvement in PDCCH performance.
Innovation Solution
The introduction of enhanced PDCCH (E-PDCCH) transmitted in the PDSCH domain, using frequency-division multiplexing with PDSCH, allowing for improved transmission efficiency by determining and using preset sets of blind detection candidates for PDCCH candidates, and adapting modulation schemes and transmission modes based on channel conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional PDCCH transmission in the control region is used, then the structure is simple and easy to implement, but the capacity and transmission efficiency are limited
Solution Approach 1:
The patent transitions PDCCH transmission from the time-domain control region to the frequency-domain PDSCH region, utilizing frequency-division multiplexing. This dimensional shift allows the control channel to leverage the additional frequency resources available in the PDSCH region, thereby increasing transmission capacity and efficiency without fundamentally redesigning the control mechanism.
Solution Approach 2:
The patent merges the PDCCH transmission with the PDSCH region through frequency-division multiplexing, combining control information transmission with data channel resources. This integration allows the control channel to benefit from the broader resource pool of the PDSCH region, improving overall system throughput and spectral efficiency.
2Reliability
If blind detection is performed on multiple PDCCH candidates across different aggregation levels, then the reliability of control information reception is improved, but the detection complexity and processing time increase
Solution Approach 1:
The patent employs preliminary actions by pre-configuring multiple sets of blind detection candidates with different aggregation levels before the actual detection process. The UE is provided with configuration information that specifies these preset sets, allowing the blind detection to systematically traverse predefined candidate configurations rather than exhaustively searching all possibilities, thus reducing detection complexity while maintaining reliability.
3Adaptability or versatility
If the control region uses fixed CCE aggregation levels, then the implementation is simplified, but the adaptability to different channel conditions and user requirements is reduced
Solution Approach 1:
The patent introduces dynamic adaptability by allowing the selection of different CCE aggregation levels (1, 2, 4, or 8) based on channel conditions and user requirements. The system can dynamically adjust the aggregation level to optimize performance - using higher aggregation levels for robust transmission in poor channel conditions and lower aggregation levels for efficiency in good conditions, while the UE blindly detects across multiple predefined aggregation level configurations.
Data Source
AI summary
Disclosed are an information sending and blind detection method and device, relating to the technical field of wireless communication technologies and for realizing a new information sending and blind detection method over a physical downlink control channel (PDCCH). In the present application, a base station determines a plurality of preset blind detection candidate sets, each blind detection candidate set containing at least one PDCCH candidate resource; and uses the PDCCH Candidates in at least one blind detection candidate set of the plurality of blind detection candidate sets to send control information to a terminal. The terminal determines a plurality of preset blind detection candidate sets, and performs blind detection of control information over the PDCCH Candidates in each blind detection candidate set of the plurality of blind detection candidate sets. By applying the present applications, a new information sending and blind detection method over a PDCCH is realized.