Device-Based Uplink Scheduling via Bandwidth Part Switching

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Solution Overview

Problem

Current wireless communications networks face challenges in efficiently supporting a wide range of devices with diverse data traffic profiles and requirements, particularly in terms of low latency and high reliability for services like Ultra Reliable Low Latency Communications (URLLC).

Innovation Solution

The method involves a communications device determining whether to operate in a communications device-based scheduling mode, which allows it to switch from a first bandwidth part (BWP) to a second BWP with greater bandwidth for uplink data transmission. This mode enables the device to transmit scheduling information and data within dedicated control and data resources of the wider BWP.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If network-based scheduling mode is used, then device complexity is reduced, but latency increases and reliability decreases for delay-sensitive applications

Engineering Contradiction:
Improvescheduling complexityVSAvoidtransmission latency
Core Design Contradiction:
Device complexityVSLoss of time

Solution Approach 1:

The patent implements dynamic switching between network-based scheduling mode and device-based scheduling mode. The communications device monitors its data buffer status and traffic characteristics in real-time, and dynamically selects the appropriate scheduling mode. When data arrives at the buffer or traffic characteristics change, the device can switch to device-based scheduling mode to reduce latency, and switch back to network-based mode when latency is not critical, thus resolving the contradiction between complexity and latency.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The patent changes the scheduling parameter from network-controlled to device-controlled by enabling the communications device to autonomously determine when to transmit uplink data. The device monitors its own buffer status and traffic characteristics, and makes scheduling decisions based on real-time conditions rather than relying on network scheduling, thereby reducing latency while maintaining acceptable complexity through parameter-based control.

Inventive Principle:
Principle #35Parameter changes

2Loss of time

If device-based scheduling mode is used, then transmission latency is reduced, but device complexity increases

Engineering Contradiction:
Improvetransmission latencyVSAvoidscheduling complexity
Core Design Contradiction:
Loss of timeVSDevice complexity

Solution Approach 1:

The patent makes the scheduling mode dynamic rather than fixed. The communications device can switch between network-based and device-based scheduling modes based on real-time conditions such as data buffer status and traffic characteristics. This dynamic switching allows the device to adopt device-based scheduling only when needed (reducing latency) while falling back to network-based scheduling when complexity would be excessive, thus resolving the contradiction.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The communications device performs self-monitoring of its own buffer status and traffic characteristics to autonomously determine when device-based scheduling is appropriate. The device serves itself by making scheduling decisions based on its own state rather than requiring continuous network control, which reduces latency while keeping the complexity manageable through self-awareness and self-driven scheduling.

Inventive Principle:
Principle #25Self-service

3Device complexity

If a single bandwidth part is used for all transmissions, then device complexity is reduced, but radio resource efficiency decreases for diverse traffic profiles

Engineering Contradiction:
Improvebandwidth configuration complexityVSAvoidradio resource efficiency
Core Design Contradiction:
Device complexityVSProductivity

Solution Approach 1:

The patent segments the bandwidth into multiple bandwidth parts (BWPs) with different characteristics. Each BWP can be optimized for specific traffic types or quality requirements. The communications device selects the appropriate BWP based on its current traffic profile, allowing efficient use of radio resources for diverse services while maintaining manageable complexity through standardized BWP configurations.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Different bandwidth parts are configured with different qualities or characteristics tailored to specific traffic requirements. The device can select a BWP with appropriate bandwidth, latency characteristics, and resource allocation based on the current transmission needs, thereby optimizing radio resource efficiency for each local traffic profile while keeping the overall system complexity manageable through standardized local configurations.

Inventive Principle:
Principle #3Local quality

4Reliability

If network-based scheduling is used, then reliability is maintained through network control, but adaptability to diverse traffic profiles decreases

Engineering Contradiction:
Improvetransmission reliabilityVSAvoidtraffic profile adaptability
Core Design Contradiction:
ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent implements dynamic adaptability where the communications device can switch between scheduling modes based on its traffic profile. For reliable traffic types, the device uses network-based scheduling to maintain reliability. For latency-sensitive or bursty traffic, the device switches to device-based scheduling to adapt to diverse profiles. This dynamic adaptation allows the system to maintain reliability when needed while adapting to diverse traffic profiles when appropriate.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The device changes scheduling parameters based on its traffic characteristics by monitoring buffer status and traffic type. When traffic requires high reliability, the device parameters indicate network-based scheduling. When traffic is latency-sensitive or has diverse characteristics, the device changes parameters to enable device-based scheduling, thus achieving adaptability to diverse traffic profiles while maintaining reliability through parameter-based control.

Inventive Principle:
Principle #35Parameter changes

Data Source

PatentUS20250119906A1Methods, communications devices, and infrastructure equipment
Publication Date: 2025.04.10 SONY GROUP CORP
  • US20250119906A1 patent drawing
  • US20250119906A1 patent drawing
  • US20250119906A1 patent drawing

AI summary

A method for operating a communications device in a wireless network involves determining when the device has uplink data to send. The device independently decides whether to use a device-based scheduling mode. If this mode is chosen, the device switches from a first bandwidth part (BWP) to a second BWP, which has greater bandwidth and includes both control and data resources. The device then sends scheduling information within the control resource, indicating its intent to transmit uplink data, and subsequently sends the uplink data within the data resource according to the scheduling information.