Terminal Device PDCCH Detection Complexity Reduction

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Solution Overview

Problem

In current 5G and new radio (NR) wireless communication systems, terminal devices face high complexity and increased power consumption due to the need to detect multiple physical downlink control channels (PDCCHs) simultaneously, which complicates the blind detection process.

Innovation Solution

The method involves the network device associating each piece of downlink control information with other relevant information, allowing the terminal device to acquire details about subsequent PDCCHs based on the format size, reducing the number of blind detection requirements by indicating the number of subsequent PDCCHs, and using instruction information to manage detection units.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the terminal device detects multiple PDCCHs simultaneously, then the downlink control information coverage is improved, but the detection complexity increases

Engineering Contradiction:

Improvedownlink control information coverageVSAvoiddetection complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The first downlink control information is decoded before detecting subsequent PDCCHs, and it contains indication information about the number of subsequent PDCCHs. This preliminary action allows the terminal device to plan its detection sequence and reduce blind detection attempts, thereby resolving the contradiction between comprehensive control information coverage and detection complexity.

Inventive Principle:

Principle #10Preliminary action

2Productivity

If the terminal device detects multiple PDCCHs simultaneously, then the scheduling efficiency is improved, but the power consumption increases

Engineering Contradiction:

Improvescheduling efficiencyVSAvoidpower consumption

Core Design Contradiction:

ProductivityVSUse of energy by moving object

Solution Approach 1:

By decoding the first downlink control information first and using its indication information to determine the number of subsequent PDCCHs, the terminal device avoids unnecessary blind detection attempts. This preliminary action reduces power consumption while maintaining efficient multi-PDCCH scheduling capability.

Inventive Principle:

Principle #10Preliminary action

3Reliability

If the terminal device performs blind detection on multiple PDCCHs, then the control information reception is ensured, but the detection time increases

Engineering Contradiction:

Improvecontrol information receptionVSAvoiddetection time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The first downlink control information is decoded in advance, and its indication information about the number of subsequent PDCCHs is used to optimize the detection sequence. This preliminary action reduces the total detection time by avoiding unnecessary blind detection attempts, while ensuring reliable control information reception through systematic detection of all indicated PDCCHs.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS11330615B2Wireless communication method, terminal device and transmitting and receiving nodes

Publication Date: 2022.05.10 KONINKLIJKE PHILIPS NV

AI summary

Disclosed are a wireless communication method, a terminal device, and transmitting and receiving nodes. The method comprises: a terminal device receiving, in a first time domain scheduling unit, first downlink control information; and the terminal device acquiring, according to the first downlink control information, information about second downlink control information to be detected in the first time domain scheduling unit. The method, the terminal device and the transmitting and receiving nodes in the embodiments of the present application are beneficial to reduce the complexity of PDCCH detection by the terminal device.