Grant-Free Uplink Transmission Format Selection for Wireless Networks

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Solution Overview

Problem

In next-generation wireless communication networks, the traditional scheduling/grant mechanism for uplink data channels leads to significant signaling overhead and transmission delay when handling massive user access, necessitating a more efficient resource allocation method.

Innovation Solution

A grant-free transmission method where terminal devices determine and implement a transmission format independently, selecting from pre-configured options based on data amount, downlink quality, QoS requirements, and available resources, without dynamic scheduling from the network device.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional scheduling/grant mechanism is used for uplink data channel selection, then resource allocation control is achieved, but signaling overhead increases and transmission delay occurs when handling massive user access

Engineering Contradiction:

Improveresource allocation controlVSAvoidtransmission delay

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The network device pre-configures multiple transmission formats and pre-configured resources for terminal devices before actual data transmission. This allows terminal devices to directly select and use appropriate transmission formats without waiting for dynamic scheduling grants, thereby reducing transmission delay while maintaining resource allocation control through the pre-configured options

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

Terminal devices autonomously select transmission formats from pre-configured options based on their own data transmission needs, data amounts, and channel conditions without requiring network device scheduling. This self-service mechanism eliminates signaling overhead for grant acquisition while ensuring resource allocation control through the pre-configured format options

Inventive Principle:

Principle #25Self-service

2Reliability

If traditional scheduling/grant mechanism is used for uplink data channel selection, then resource allocation control is achieved, but signaling overhead increases when handling massive user access

Engineering Contradiction:

Improveresource allocation controlVSAvoidsignaling overhead

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

The patent extracts the dynamic scheduling grant acquisition process from the traditional mechanism, allowing terminal devices to directly use pre-configured transmission formats without requesting and receiving dynamic grants. This removes the signaling overhead associated with scheduling requests and uplink grants while maintaining resource allocation control through the pre-configured format options

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

Terminal devices independently select transmission formats from pre-configured options based on their data transmission needs without network device intervention for each transmission. This self-service approach eliminates the bidirectional signaling required in traditional scheduling, reducing signaling overhead while maintaining resource allocation control

Inventive Principle:

Principle #25Self-service

3Productivity

If terminal device autonomously determines transmission format, then signaling overhead and transmission delay are reduced, but transmission format selection complexity increases

Engineering Contradiction:

Improvetransmission efficiencyVSAvoidtransmission format selection

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

Different transmission formats are configured with different local characteristics (modulation schemes, code rates, resource block sizes) suitable for specific data amounts and channel conditions. Terminal devices select formats based on local conditions such as data amount size and downlink quality, making the selection process straightforward rather than complex

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The network device performs the complex work of configuring multiple transmission formats with different parameters in advance. Terminal devices only need to select from these pre-configured options based on simple criteria like data amount and channel quality, reducing their selection complexity while maintaining transmission efficiency

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS10925073B2Radio communication method, terminal device, and network device

Publication Date: 2021.02.16 KONINKLIJKE PHILIPS NV

AI summary

Embodiments of the present application allow a terminal device to determine a transmission format via a non-scheduling means and implement license-free transmission. Provided are a radio communication method, a terminal device, and a network device. The method comprises: a terminal device determines a first transmission format used for transmitting data to be transmitted; according to the first transmission format, the terminal device transmits to a network device the data to be transmitted.