Dynamic PDCCH Scheduling for Flexible Resource Allocation

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Solution Overview

Problem

The existing scheduling methods for Physical Downlink Control Channels (PDCCHs) in LTE systems lead to low network resource utilization and lack flexibility due to fixed time domain positions, limiting the efficient allocation of resources for Physical Downlink Data Channels (PDSCHs).

Innovation Solution

A communication method where a terminal device receives a PDCCH in a first time domain scheduling unit to schedule PDSCHs in preceding units, allowing for flexible resource allocation by caching and reusing data across time domain scheduling units, and receiving indication information to determine the position of PDSCHs within those units.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If PDCCH time domain position is fixed in first few symbols of each subframe, then the scheduling structure is simple and easy to implement, but the network resource utilization is low and flexibility is poor

Engineering Contradiction:

Improvescheduling structure simplicityVSAvoidnetwork resource utilization

Core Design Contradiction:

Ease of manufactureVSProductivity

Solution Approach 1:

The patent makes the PDCCH time domain position dynamic rather than fixed. The network device can flexibly determine the time domain position of PDCCH based on actual scheduling needs, allowing the same time domain unit to be reused across different scheduling instances. This dynamic positioning resolves the contradiction by enabling high resource utilization while maintaining implementation feasibility through standardized procedures.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent enables a single PDCCH to serve multiple scheduling functions across different time domain units. The PDCCH in one time domain unit can schedule PDSCH in the same unit or in other time domain units, creating a universal scheduling mechanism that improves resource utilization without complicating the overall structure.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Ease of operation

If PDCCH schedules only current and future time domain units, then the scheduling logic is straightforward, but the flexibility of resource allocation is limited

Engineering Contradiction:

Improvescheduling logic simplicityVSAvoidresource allocation flexibility

Core Design Contradiction:

Ease of operationVSAdaptability or versatility

Solution Approach 1:

The patent inverts the conventional scheduling direction by allowing PDCCH to schedule not only current and future time domain units but also past time domain units. This inversion enables flexible resource allocation where data can be transmitted in earlier time units and scheduled later, improving adaptability while maintaining clear scheduling logic through standardized procedures.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent enables preliminary scheduling actions where the network device can determine PDCCH positions and scheduling parameters in advance, allowing flexible resource allocation across multiple time domain units. The terminal device can prepare for reception based on received indication information, maintaining operational simplicity while achieving versatile resource allocation.

Inventive Principle:

Principle #10Preliminary action

3Quantity of substance

If new time domain scheduling units are allocated to expand PDSCH transmission resources, then the resource capacity increases, but the network resource utilization efficiency decreases

Engineering Contradiction:

ImprovePDSCH transmission resourcesVSAvoidnetwork resource utilization efficiency

Core Design Contradiction:

Quantity of substanceVSProductivity

Solution Approach 1:

The patent merges multiple time domain units into a unified scheduling framework where a single PDCCH can schedule PDSCH across multiple time domain units. This combining approach expands PDSCH transmission resources without allocating new time domain units, as the same time domain units are reused more efficiently through cross-unit scheduling.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent changes the scheduling parameters to enable flexible resource allocation. By modifying how PDCCH positions and scheduling assignments are determined (from fixed to dynamic), the system expands effective PDSCH resources while improving utilization efficiency. The indication information mechanism allows parameter flexibility without requiring additional time domain units.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS10912113B2Communication method, terminal device, and network device

Publication Date: 2021.02.02 GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD

AI summary

A communication method, a terminal device and a network device are provided. The communication method includes: receiving, by a terminal device, a first physical downlink control channel sent by a network device in a first time domain scheduling unit, wherein the first physical downlink control channel is used for scheduling a physical downlink data channel in at least one time domain scheduling unit before the first time domain scheduling unit; and receiving, by the terminal device, data corresponding to the first physical downlink control channel in the at least one time domain scheduling unit according to the first physical downlink control channel.