Uplink Resource Block Allocation Based on Power Headroom

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Solution Overview

Problem

Telecommunication systems face challenges in maintaining effective coverage due to uplink transmit power reductions, which negatively impact wireless devices near the cell edge, especially when allocating resource blocks based on varying channel conditions.

Innovation Solution

The system allocates resource blocks based on uplink transmission parameters, including a headroom report and potential resource block allocations across multiple frequency bands, selecting allocations that maximize power reduction while considering the transmission power headroom for each device, thereby prioritizing devices near the cell edge.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If resource blocks are allocated based on conventional scheduling without considering uplink transmit power reductions, then resource allocation efficiency is improved, but coverage quality for cell edge devices deteriorates

Engineering Contradiction:

Improveresource allocation efficiencyVSAvoidcoverage quality

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The system changes the scheduling parameters by incorporating uplink transmit power reduction information into the resource block allocation decision process. The access node determines maximum transmit power reductions for each wireless device based on their specific conditions, and uses these power reduction values as additional parameters when selecting resource blocks, thereby optimizing both allocation efficiency and coverage quality simultaneously

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The system applies different resource block allocation strategies to different wireless devices based on their local conditions. Cell edge devices experiencing significant power reductions receive resource blocks with better channel conditions, while devices with minimal power reductions follow conventional scheduling, thereby achieving local optimization for each device's specific situation

Inventive Principle:

Principle #3Local quality

2Object-affected harmful factors

If transmit power is reduced to comply with standards and regulations, then interference to other systems is reduced, but coverage area and service quality deteriorate

Engineering Contradiction:

Improveinterference to other systemsVSAvoidcoverage area

Core Design Contradiction:

Object-affected harmful factorsVSArea of stationary object

Solution Approach 1:

The system converts the harmful effect of transmit power reduction into a beneficial scheduling opportunity. By identifying which resource blocks experience power reductions and by how much, the access node can proactively allocate alternative resource blocks with better channel conditions, thereby converting the power reduction constraint into an opportunity for optimized resource allocation that maintains coverage area

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

The system performs preliminary determination of maximum transmit power reductions for each wireless device before actual resource block allocation. This advance knowledge allows the access node to pre-plan resource block assignments that account for power reductions, selecting resource blocks that will maintain service quality even when power reductions occur

Inventive Principle:

Principle #10Preliminary action

3Speed

If resource blocks are allocated without considering power headroom, then allocation speed is improved, but service quality for power-constrained devices deteriorates

Engineering Contradiction:

Improveallocation speedVSAvoidservice quality

Core Design Contradiction:

SpeedVSReliability

Solution Approach 1:

The system performs preliminary determination of power headroom values for each wireless device before resource block allocation. By having this information ready in advance, the access node can quickly make informed allocation decisions without adding significant processing delay, thereby maintaining allocation speed while improving service quality for power-constrained devices

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS10129882B1Systems and methods for allocating resource blocks based on uplink transmission parameters

Publication Date: 2018.11.13 SPRINT SPECTRUM LLC

AI summary

Systems and methods are described for allocating resource blocks based on uplink transmission parameters, resulting in beneficial coverage and capacity of a wireless system. A headroom report that comprises a transmission power headroom for a wireless device may be received. Potential resource block allocations for the wireless device may be generated based on channel information for a plurality of frequency bands, the generated potential resource block allocations comprising a frequency band and a time slot. A potential resource block allocation may be selected from among the potential resource block allocations based on a maximum power reduction for the allocation and the reported transmission power headroom for the wireless device. The selected resource blocks may then be allocated for the wireless device.