Dynamic DCI Payload Sizing for UE Blind Decoding
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Solution Overview
Problem
In wireless communication systems, particularly in future mobile communication systems with beamforming and massive MIMO, the existing approach of one DCI format corresponding to one payload size leads to unnecessary padding bits, resulting in waste of control signaling resources and increased complexity for UE blind decoding.
Innovation Solution
A method where the payload size of DCI signaling is adjusted based on the transmission mode, eliminating the need for padding bits and allowing multiple candidate modes for transmission, thereby reducing overheads and simplifying UE implementation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If one DCI format corresponds to one payload size, then the control signaling structure is simple, but extra padding bits are added resulting in waste of control signaling resources
Solution Approach 1:
The patent applies dynamics by making the DCI payload size variable based on transmission mode. Different transmission modes (sweeping vs. non-sweeping) correspond to different payload sizes, allowing the system to adapt the control signaling length to actual needs without using fixed padding bits. This resolves the contradiction by making the DCI format dynamic rather than static.
Solution Approach 2:
The patent changes the payload size parameter of DCI formats according to transmission mode requirements. By adjusting the number of bits in the DCI payload based on whether sweeping or non-sweeping mode is used, the system eliminates unnecessary padding bits while maintaining a unified DCI format structure, thus reducing control signaling resource waste.
2Ease of manufacture
If one DCI format corresponds to one payload size, then the control signaling design is simplified, but the complexity of UE blind decoding increases due to multiple DCI formats needed for different payload sizes
Solution Approach 1:
The patent makes a single DCI format universal by enabling it to carry different payload sizes depending on the transmission mode. Instead of designing multiple specialized DCI formats for different scenarios, one unified DCI format can adapt to both sweeping and non-sweeping modes by adjusting its payload content, thereby simplifying both the design and the UE's blind decoding process.
Solution Approach 2:
The patent introduces dynamics to the DCI format by allowing its payload size to change based on transmission mode indicators. This dynamic adjustment capability enables a single DCI format to replace multiple static formats, reducing the complexity of UE blind decoding while maintaining design simplicity.
3Productivity
If padding bits are added to keep same payload size, then the number of blind decoding times is reduced, but control signaling resources are wasted
Solution Approach 1:
The patent changes the payload size parameter dynamically based on transmission mode rather than using fixed padding. By adjusting the actual information content length according to whether sweeping or non-sweeping mode is used, the system achieves efficient blind decoding without wasting control signaling resources on unnecessary padding bits.
Solution Approach 2:
The patent extracts and removes the unnecessary padding bits from the DCI format. By taking out the redundant padding elements and allowing the payload size to naturally vary with transmission mode, the system maintains blind decoding efficiency while eliminating waste of control signaling resources.
Data Source
AI summary
The disclosure provides a method and a device for dynamic scheduling in a User Equipment (UE) and a base station. The UE detects a first signaling. The first signaling is a physical layer signaling. The first signaling includes a first bit block, and a number of bits in the first bit block is related to a transmission mode of the first signaling. The transmission mode of the first signaling is one of multiple candidate modes. For the first candidate mode, the first bit block is transmitted multiple times; and for the second candidate mode, the first bit block is transmitted once. The disclosure establishes a relationship between a payload size of the first signaling and a transmission mode of the first signaling, thus reducing the payload size of the first signaling, simplifying the complexity of blind decoding of control signalings, and improving transmission efficiency and spectrum efficiency of the system.