Group-Common PDCCH Signaling to Reduce UE Blind Decoding
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing power consumption and resource usage due to the high number of blind decoding operations required for UEs to receive control information, particularly when multiple UEs are involved, leading to increased power consumption and resource consumption.
Innovation Solution
Implementing group-common control information to indicate PDCCH candidates, combined with UE-specific control information, reduces the number of blind decoding operations by indicating CCE locations, thereby decreasing power consumption and resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UEs perform blind decoding operations to receive control information individually, then each UE can receive its control information, but the number of blind decoding operations increases significantly leading to high power consumption and resource usage
Solution Approach 1:
The patent combines control information for multiple UEs into a single group-common PDCCH transmission. Instead of each UE receiving separate control information through individual blind decoding operations, the network transmits a unified group-common control message that contains scheduling information for multiple UEs. This merging approach reduces the total number of blind decoding operations required, as UEs can decode the group-common PDCCH once and extract their relevant information, thereby significantly reducing power consumption while maintaining reliable control information reception.
2Ease of operation
If multiple UEs monitor individual PDCCH candidates, then each UE can receive UE-specific control information, but the number of PDCCH candidates and blind decoding operations increases
Solution Approach 1:
The patent merges multiple UE-specific PDCCH candidates into a single group-common PDCCH candidate. The group-common control information contains scheduling information for multiple UEs, allowing them to all monitor the same PDCCH candidate location. This reduces the total number of PDCCH candidates that need to be monitored across the system, simplifying the operation while maintaining ease of control information reception for each UE.
Solution Approach 2:
The group-common PDCCH serves multiple UEs simultaneously, making it a universal control channel that performs the function of multiple UE-specific PDCCHs. The single group-common PDCCH candidate structure is designed to carry scheduling information for multiple UEs, allowing one PDCCH transmission to serve multiple purposes and multiple UEs, thereby reducing the overall complexity of blind decoding operations required in the system.
3Reliability
If the network transmits separate control information to multiple UEs, then each UE receives its scheduling information, but resource usage increases due to multiple PDCCH transmissions
Solution Approach 1:
The patent merges multiple separate control information transmissions into a single group-common PDCCH transmission. Instead of the network transmitting individual PDCCHs to each UE, it transmits one consolidated group-common PDCCH that contains scheduling information for multiple UEs. This significantly reduces the quantity of control resources consumed, as the same time-frequency resources are utilized more efficiently to deliver control information to multiple UEs simultaneously, while maintaining reliable scheduling information delivery.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive group-common control information comprising an indication of one or more physical downlink control channel (PDCCH) candidates for receiving UE-specific control information for the UE. The UE may receive the UE-specific control information in response to monitoring the one or more PDCCH candidates, the UE-specific control information comprising scheduling information for a shared channel communication. The UE may transmit or receive the shared channel communication according to the scheduling information. Numerous other aspects are described.