PDCCH Location Indication to Reduce Blind Detection Load

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Solution Overview

Problem

There is a lack of sufficient signaling resources for physical downlink control channels (PDCCH) in wireless communication systems, particularly in scenarios with high-layer support and multiple UEs, leading to resource constraints and inefficient blind detection processes.

Innovation Solution

A first PDCCH message is used to indicate the location of a second PDCCH message, allowing for dynamic allocation and reducing the need for blind detection, thereby conserving power and signaling resources.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional blind detection is used for PDCCH messages, then all possible locations must be monitored, but this consumes excessive power and signaling resources

Engineering Contradiction:

ImprovePDCCH message reception reliabilityVSAvoidUE power consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The network entity performs preliminary action by indicating the location of the second PDCCH message in the first PDCCH message before the UE needs to detect it. This allows the UE to skip blind detection across all possible locations and directly monitor the indicated location, significantly reducing power consumption while maintaining reliable message reception.

Inventive Principle:

Principle #10Preliminary action

2Adaptability or versatility

If multiple PDCCH messages are transmitted for high-layer support and multiple UEs, then resource allocation flexibility increases, but signaling resources become insufficient

Engineering Contradiction:

ImproveResource allocation flexibilityVSAvoidSignaling resources

Core Design Contradiction:

Adaptability or versatilityVSQuantity of substance

Solution Approach 1:

The invention merges the location indication function into the first PDCCH message itself. By combining the scheduling information and location indication into a single message, the system achieves flexible resource allocation for multiple UEs and high-layer support without requiring additional separate signaling resources to indicate message locations.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The first PDCCH message serves multiple functions: it carries scheduling information for the second PDCCH message and simultaneously indicates the location where the second message will be transmitted. This multi-functionality reduces the need for separate location indication signaling, conserving resources while maintaining allocation flexibility.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Reliability

If blind detection is performed at all possible PDCCH locations, then no message is missed, but the blocking at UE increases and processing efficiency decreases

Engineering Contradiction:

ImproveMessage detection completenessVSAvoidUE processing efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The network entity performs preliminary action by indicating the exact location of the second PDCCH message in the first message. This eliminates the need for the UE to perform exhaustive blind detection at all possible locations, thereby maintaining complete message detection while dramatically improving processing efficiency and reducing UE blocking.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20260059540A1Indication of physical downlink control channel message

Publication Date: 2026.02.26 QUALCOMM INC

AI summary

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, in a first physical downlink control channel (PDCCH) message, an indication of a location of a second PDCCH message. The UE may receive the second PDCCH message in the location. Numerous other aspects are described.