Terminal PDCCH Skipping Control for Pending Scheduling Requests

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Solution Overview

Problem

Current 5G wireless communication systems face challenges in optimizing PDCCH monitoring, particularly in scenarios where scheduling requests are pending, leading to inefficiencies in resource allocation and communication latency.

Innovation Solution

The proposed solution involves a method and system where a terminal and base station exchange RRC messages and DCI indicating PDCCH skipping durations, allowing the terminal to ignore PDCCH skipping on all serving cells when a scheduling request is pending, thereby optimizing resource management and reducing communication latency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by stationary object

If PDCCH skipping is implemented to reduce monitoring overhead, then energy consumption and complexity are reduced, but scheduling request handling efficiency deteriorates when SR is pending

Engineering Contradiction:

Improveterminal energy consumptionVSAvoidscheduling request handling efficiency

Core Design Contradiction:

Use of energy by stationary objectVSProductivity

Solution Approach 1:

The patent applies dynamics by making the PDCCH skipping behavior adaptive and conditional rather than static. The terminal dynamically adjusts its PDCCH monitoring behavior based on the scheduling request status: when SR is pending, the terminal ignores PDCCH skipping and continues monitoring; when SR is not pending, the terminal applies PDCCH skipping to save energy. This dynamic adjustment resolves the contradiction between energy saving and scheduling efficiency.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the parameter of PDCCH monitoring behavior based on the scheduling request state. By modifying the monitoring parameter (skipping or not skipping) according to the SR status, the system optimizes both energy consumption and scheduling efficiency. The parameter change allows the terminal to transition between energy-saving mode and scheduling-responsive mode as needed.

Inventive Principle:

Principle #35Parameter changes

2Use of energy by stationary object

If PDCCH skipping duration is extended to maximize resource saving, then terminal power consumption is reduced, but communication latency increases

Engineering Contradiction:

Improveterminal power consumptionVSAvoidcommunication latency

Core Design Contradiction:

Use of energy by stationary objectVSLoss of time

Solution Approach 1:

The patent applies dynamics by making the PDCCH skipping duration adaptive rather than fixed. The skipping duration is dynamically adjusted based on the scheduling request status and timing. When SR is pending, the terminal does not apply skipping, avoiding latency. When SR is not pending, the terminal applies skipping to save power. This dynamic control resolves the contradiction between power saving and latency.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent uses feedback mechanisms where the terminal monitors its own scheduling request status and adjusts PDCCH skipping behavior accordingly. The feedback loop ensures that the terminal responds appropriately to scheduling needs while maximizing power saving opportunities, thereby balancing latency and power consumption.

Inventive Principle:

Principle #23Feedback

3Device complexity

If PDCCH skipping is applied to all serving cells, then monitoring complexity is reduced, but scheduling flexibility is limited when SR is pending

Engineering Contradiction:

ImprovePDCCH monitoring complexityVSAvoidscheduling flexibility

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The patent applies dynamics by making the PDCCH skipping application conditional based on scheduling request status. When SR is pending, the terminal dynamically stops applying skipping to maintain scheduling flexibility. When SR is not pending, the terminal applies skipping to all serving cells to reduce complexity. This dynamic conditional application resolves the contradiction between complexity reduction and scheduling flexibility.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent applies local quality by differentiating the PDCCH skipping behavior across different states. Instead of uniformly applying skipping to all serving cells in all conditions, the system applies skipping locally only when appropriate (when SR is not pending). This selective local application maintains scheduling flexibility when needed while achieving complexity reduction when possible.

Inventive Principle:

Principle #3Local quality

Data Source

PatentEP4124143A1Method and apparatus for pdcch skipping and scheduling request

Publication Date: 2023.01.25 SAMSUNG ELECTRONICS CO LTD

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AI summary

The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. A method performed by a terminal in a wireless communication system is provided. The method includes receiving, from a base station, a radio resource control (RRC) message including information on a physical downlink control channel (PDCCH) skipping duration, receiving, from the base station, downlink control information (DCI) indicating a PDCCH skipping for a serving cell of a cell group, and ignoring the PDCCH skipping on all serving cells of the cell group, in case that a scheduling request (SR) is sent on the serving cell of the cell group and is pending.