Segmented Downlink Control Information for UE Complexity Reduction
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Solution Overview
Problem
Current wireless communication systems face complexity and increased power consumption in User Equipment (UE) due to the need for blind detection of various control signal payload sizes, which is exacerbated by the introduction of new transmission schemes and payload sizes not previously supported, leading to increased UE complexity and power consumption.
Innovation Solution
The solution involves segmenting downlink control information (DCI) into modular blocks, allowing the UE to receive and combine these blocks to form the original DCI signaling, using header information to distinguish between formats and content, thereby maintaining a constant number of blind decodes and supporting a wide range of control signal payload sizes without increasing UE complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the UE performs blind detection of various control signal payload sizes to support new transmission schemes, then the adaptability of the UE is improved, but the device complexity and power consumption increase
Solution Approach 1:
The downlink control information is divided into multiple segments, where a first segment contains a first payload size and a second segment contains a second payload size. The UE performs blind detection on the first segment to determine the actual payload size, then uses this information to correctly decode the second segment. This segmentation approach allows the UE to support multiple payload sizes without increasing the number of blind detection attempts, thereby resolving the contradiction between adaptability and device complexity.
2Adaptability or versatility
If the UE performs blind detection of various control signal payload sizes to support new transmission schemes, then the adaptability of the UE is improved, but the power consumption increases
Solution Approach 1:
The downlink control information is divided into multiple segments, where a first segment contains a first payload size and a second segment contains a second payload size. The UE performs blind detection on the first segment to determine the actual payload size, then uses this information to correctly decode the second segment. This segmentation approach allows the UE to support multiple payload sizes without increasing the number of blind detection attempts, thereby resolving the contradiction between adaptability and device complexity.
3Ease of operation
If the DCI is transmitted as a single block, then the transmission simplicity is maintained, but the UE cannot efficiently determine payload size without increased blind detection
Solution Approach 1:
The downlink control information is divided into multiple segments, where a first segment contains a first payload size and a second segment contains a second payload size. The UE performs blind detection on the first segment to determine the actual payload size, then uses this information to correctly decode the second segment. This segmentation approach allows the UE to support multiple payload sizes without increasing the number of blind detection attempts, thereby resolving the contradiction between adaptability and device complexity.
Solution Approach 2:
The first segment of the DCI is transmitted before the second segment, and the first segment contains information that enables the UE to determine the payload size of the second segment. This preliminary action allows the UE to prepare the correct decoding parameters before receiving the second segment, making the overall transmission process simpler and more efficient.
Data Source
AI summary
Technology for a Next Generation NodeB (gNB) operable to encode downlink control information (DCI) for transmission to a user equipment (UE) is disclosed. The gNB can identify DCI for transmission from the gNB. The gNB can determine that a size of the DCI exceeds a defined threshold. The gNB can divide the DCI into one or more DCI segments. Each DCI segment can include header information to enable the one or more DCI segments to be assembled at the UE. The gNB can encode the one or more DCI segments of the DCI for transmission from the gNB to the UE.