E-PDCCH Blind Detection Mode Determination for Energy Efficiency
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Solution Overview
Problem
In LTE systems, User Equipment (UE) experiences unnecessary energy overhead during blind E-PDCCH detection due to performing blind detection at low E-CCE aggregation levels, which are not always necessary and result in inefficient energy use.
Innovation Solution
A method where the eNB determines and notifies the UE of a blind detection mode based on system configuration information and UE capabilities, selecting specific E-CCE aggregation levels for blind detection, ensuring that only necessary resources are used for E-PDCCH detection, thereby reducing energy overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UE performs blind detection at all E-CCE aggregation levels, then detection reliability is improved, but energy consumption increases
Solution Approach 1:
The patent applies dynamics by making the blind detection configuration adaptive rather than fixed. The eNB dynamically determines which E-CCE aggregation levels the UE should perform blind detection based on real-time system conditions including downlink control information requirements, UE blind detection capability, and available REs in DwPTS, thereby optimizing the balance between detection reliability and energy consumption.
Solution Approach 2:
The patent changes the parameter of blind detection configuration by allowing the eNB to modify the set of E-CCE aggregation levels based on system conditions. The configuration includes parameters such as the set of aggregation levels, number of times for blind detection at each level, and mapping between aggregation levels and REs, enabling flexible adaptation to different operational scenarios.
2Adaptability or versatility
If UE performs blind detection at low E-CCE aggregation levels, then detection coverage is improved, but energy overhead increases
Solution Approach 1:
The patent applies partial action by having the UE perform blind detection only at necessary E-CCE aggregation levels rather than all possible levels. The eNB determines the appropriate aggregation levels based on system conditions, allowing the UE to skip unnecessary detection attempts at certain levels, thereby reducing energy overhead while maintaining adequate detection coverage.
Solution Approach 2:
The patent applies local quality by treating different E-CCE aggregation levels differently based on their specific characteristics and requirements. The configuration allows selective blind detection at specific aggregation levels (e.g., levels 1, 2, 4, 8, 16, 32) rather than uniform treatment of all levels, optimizing energy usage based on the local characteristics of each aggregation level.
3Reliability
If eNB configures all E-CCE aggregation levels for blind detection, then detection completeness is improved, but system complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the blind detection process into discrete, manageable aggregation levels. The eNB configures the UE with specific sets of E-CCE aggregation levels (e.g., {1, 2, 4, 8, 16, 32}) rather than treating all possible levels uniformly, making the system more manageable and easier to implement while maintaining detection completeness.
Data Source
Figure 1A~1B
Figure 2~3
Figure 4A~4C
AI summary
Disclosed are a blind detection mode determination method, blind detection method and device, the blind detection mode determination method comprising: a base station determines the E-PDCCH blind detection mode of a terminal in a subframe according to system configuration information and the blind detection capability of the terminal, and informs the terminal of the determined E-PDCCH blind detection mode of the terminal in the subframe. The blind detection method comprises: a terminal determines the E-PDCCH blind detection mode in a subframe, and conducts E-PDCCH blind detection in the subframe according to the determined E-PDCCH blind detection mode. The E-PDCCH blind detection mode of a UE in a subframe is determined according to the resource occupied in a subframe by the system configuration information, enabling the UE to conduct E-PDCCH blind detection in the subframe according to the determined E-PDCCH blind detection mode, thus avoiding unnecessary energy overhead.