Downlink Control Information via PDSCH Resources for Blind Decoding Reduction
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies and increased complexity due to the reliance on blind decoding of downlink control information (DCI) via physical downlink control channels (PDCCH), which increases processing burden and overhead.
Innovation Solution
Transmitting at least a portion of the DCI via physical downlink shared channel (PDSCH) resources without carrying downlink shared channel information, and indicating to the receiving device that these resources carry DCI, thereby reducing blind decoding complexity and overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If downlink control information is transmitted via physical downlink control channel resources, then control information can be delivered to user equipment, but blind decoding complexity and processing burden increase
Solution Approach 1:
The patent extracts the downlink control information from the physical downlink control channel resources and places it in the physical downlink shared channel resources instead. This separation allows the control information to be transmitted without requiring blind decoding at the user equipment, thereby reducing decoding complexity while maintaining reliable delivery.
Solution Approach 2:
The physical downlink shared channel resources are made to serve dual purposes: carrying both downlink data and downlink control information. This multi-functionality eliminates the need for separate control channel resources and blind decoding procedures, simplifying the overall system while maintaining control information delivery reliability.
2Loss of information
If blind decoding is used for downlink control information reception, then control information can be received, but processing overhead increases
Solution Approach 1:
The patent removes the blind decoding step from the control information reception process by extracting control information from control channel resources and placing it in shared channel resources. This eliminates the iterative trial-and-error decoding process, reducing processing overhead and time consumption while ensuring complete control information reception.
3Productivity
If physical downlink shared channel resources carry both downlink control information and downlink shared channel, then resource utilization improves, but transmission reliability decreases
Solution Approach 1:
The patent extracts the downlink control information from the shared channel resources when the control information size exceeds a threshold. This extraction ensures that the entire resource allocation can be dedicated to either control information or downlink data, maintaining transmission reliability by avoiding partial resource allocation that would compromise reliability.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a network node, signaling indicating that resources associated with a physical downlink shared channel (PDSCH) carry downlink control information (DCI) without carrying a downlink shared channel. The UE may receive, from the network node, the DCI via each of the resources associated with the PDSCH. Numerous other aspects are described.