Uplink Data Transmission Sub-Interlace Allocation

Solution Overview

Problem

The existing Long Term Evolution (LTE) system's uplink data transmission efficiency is low due to a coarse bandwidth allocation granularity in licensed-assisted access (LAA) systems, which restricts flexibility and utilization of unlicensed spectrum for meeting increasing service volume requirements.

Innovation Solution

The introduction of a second frequency-domain discrete structure with a refined resource allocation granularity, allowing for partial occupation of resource elements in physical resource blocks, enabling more flexible resource allocation and improved uplink transmission efficiency by allowing multiple terminals to share the same resource block.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If PRB-based interlace structure is used for bandwidth allocation in LAA system, then bandwidth occupation regulation and power spectral density regulation are met, but bandwidth allocation granularity becomes coarse (M PRBs) and resource allocation flexibility is reduced

Engineering Contradiction:

Improvecompliance with unlicensed band regulationsVSAvoidresource allocation flexibility

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent segments the interlace structure by introducing a sub-interlace concept that divides each interlace into multiple sub-interlaces. Each sub-interlace occupies a subset of PRBs within the original interlace structure, enabling finer granular allocation (e.g., 1 PRB per sub-interlace) while preserving the overall interlace framework that ensures compliance with OCB and PSD regulations.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent adds a new dimension to resource allocation by introducing sub-interlace indexing within each interlace. Instead of allocating only at the interlace level (coarse granularity), the system now allocates at the sub-interlace level (fine granularity) while maintaining the hierarchical structure that satisfies regulatory requirements.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Use of energy by moving object

If PRB-based interlace structure is used for bandwidth allocation in LAA system, then unlicensed spectrum is utilized, but uplink transmission efficiency is reduced due to coarse allocation granularity

Engineering Contradiction:

Improveunlicensed spectrum utilizationVSAvoiduplink transmission efficiency

Core Design Contradiction:

Use of energy by moving objectVSProductivity

Solution Approach 1:

The patent segments the interlace structure by introducing a sub-interlace concept that divides each interlace into multiple sub-interlaces. Each sub-interlace occupies a subset of PRBs within the original interlace structure, enabling finer granular allocation (e.g., 1 PRB per sub-interlace) while preserving the overall interlace framework that ensures compliance with OCB and PSD regulations.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent enables dynamic allocation at the sub-interlace level, allowing the network to flexibly adjust resource allocation based on channel conditions, traffic requirements, and interference levels. This dynamic sub-interlace allocation optimizes uplink transmission efficiency while maintaining compliance with unlicensed band regulations.

Inventive Principle:

Principle #15Dynamics

3Reliability

If interlace occupies one PRB in each of M sub-bands with even distribution, then bandwidth occupation regulation is met, but resource allocation becomes inflexible and cannot accommodate fine-grained allocations

Engineering Contradiction:

Improvebandwidth occupation complianceVSAvoidresource allocation flexibility

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent segments the interlace structure by introducing a sub-interlace concept that divides each interlace into multiple sub-interlaces. Each sub-interlace occupies a subset of PRBs within the original interlace structure, enabling finer granular allocation (e.g., 1 PRB per sub-interlace) while preserving the overall interlace framework that ensures compliance with OCB and PSD regulations.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent enables partial occupation of PRBs by allowing sub-interlaces to allocate only the necessary number of PRBs within each interlace. This partial allocation approach provides fine-grained control over resource distribution while maintaining the structural requirements for regulatory compliance.

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentEP3531768B1Uplink data transmission method and equipment

Publication Date: 2022.02.23 HUAWEI TECH CO LTD

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Figure 3~4C
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AI summary

An uplink data transmission method and a device are provided, to enhance resource allocation flexibility and improve uplink transmission efficiency of a terminal. The uplink data transmission method includes: receiving, by a terminal, scheduling signaling sent by a network device, where the scheduling signaling is used to indicate at least one frequency-domain discrete structure; determining, by the terminal, the at least one frequency-domain discrete structure based on the scheduling signaling, where a size value of the at least one frequency-domain discrete structure belongs to a set that includes a plurality of size values of frequency-domain discrete structures, the set includes a size value of a first frequency-domain discrete structure and a size value of a second frequency-domain discrete structure or the set includes the size value of the second frequency-domain discrete structure, and the size value of the second frequency-domain discrete structure is less than the size value of the first frequency-domain discrete structure; and initiating, by the terminal, uplink data transmission by using the at least one frequency-domain discrete structure.