DCI Payload Alignment for Multicast UE Complexity
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Solution Overview
Problem
Current wireless communication systems face complexity in transmitting and receiving Downlink Control Information (DCI) for multicast, which can increase the burden on User Equipment (UE) in terms of demodulation and decoding.
Innovation Solution
A method and device for receiving DCI, where the UE determines the formats and payload sizes of all DCI, including a multicast PDSCH format, and performs alignment operations based on higher-layer signaling to reduce complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the UE receives multiple DCI formats with different payload sizes for multicast, then the multicast transmission capability is improved, but the demodulation and decoding complexity increases
Solution Approach 1:
The patent merges multiple DCI formats with different payload sizes into a unified format structure. By aligning the payload sizes of different DCI formats (e.g., DCI format 1_0 and DCI format 1_1) through padding or truncation, the UE no longer needs to handle variable-length payloads for multicast transmissions, thereby reducing demodulation and decoding complexity while maintaining support for multiple multicast services
Solution Approach 2:
The patent changes the payload size parameter of DCI formats to achieve uniformity. By adjusting the payload size of specific DCI formats through higher-layer signaling configuration or protocol规定的 padding, all DCI formats used for multicast are transformed to have the same payload size, which simplifies the UE's reception processing and reduces computational complexity
2Adaptability or versatility
If the UE processes multiple DCI formats with different payload sizes, then the flexibility in receiving different DCI types is improved, but the processing time and resource consumption increase
Solution Approach 1:
The patent applies preliminary alignment of DCI payload sizes before the UE performs demodulation and decoding. By pre-configuring the payload size alignment through higher-layer signaling or protocol specifications, the UE is prepared in advance to handle all DCI formats with a unified payload size, eliminating the need for dynamic size adjustment during processing and thus reducing processing time
3Productivity
If the system transmits DCI with varied payload sizes, then the information transmission efficiency is improved, but the resource utilization efficiency decreases
Solution Approach 1:
The patent creates a universal DCI payload size that can accommodate multiple DCI formats used for different multicast services. This unified payload size serves multiple functions: it maintains information transmission efficiency for various multicast types while simultaneously improving resource utilization efficiency by enabling the UE to process all DCI formats through a single, standardized demodulation and decoding path, thereby reducing overall system resource consumption
Data Source
AI summary
The present disclosure provides a method performed by a user equipment (UE), the method including determining formats of all downlink control information (DCI) to be received and DCI format payload sizes corresponding to the formats of the DCI; performing an alignment operation on one or more of the DCI format payload sizes according to a protocol or higher-layer signaling; and receiving all DCI, wherein, the formats of all DCI to be received include a DCI format for a multicast physical downlink shared channel (PDSCH).