Radio Base Station Resource Allocation for Frequency Hopping

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Solution Overview

Problem

In radio communications networks, intra-subframe frequency hopping leads to inefficiencies in bandwidth utilization as it renders parts of the frequency spectrum unavailable for non-hopping user equipment, resulting in suboptimal resource allocation and interference.

Innovation Solution

A method where a radio base station allocates radio resources to a second user equipment based on the frequency hopping scheme of a first user equipment, allowing user equipments to hop into each other's complementary slots, thereby optimizing frequency spectrum utilization and reducing unused resources.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If intra-subframe frequency hopping is used for user equipment, then frequency diversity and interference mitigation are improved, but bandwidth utilization deteriorates because parts of the frequency spectrum become unavailable for non-hopping user equipment

Engineering Contradiction:

Improvefrequency diversityVSAvoidbandwidth utilization

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The bandwidth is segmented into two distinct resource pools: a first resource pool for intra-subframe hopping user equipment and a second resource pool for non-hopping user equipment. This segmentation allows each type of user equipment to access appropriate resources without conflict, maintaining frequency diversity benefits while improving overall bandwidth utilization.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different quality characteristics are assigned to different parts of the frequency spectrum. The first resource pool is optimized for hopping user equipment with specific resource allocation patterns, while the second resource pool is optimized for non-hopping user equipment. This local differentiation ensures each user equipment type receives resources suited to its operational characteristics.

Inventive Principle:

Principle #3Local quality

2Object-affected harmful factors

If intra-subframe frequency hopping is configured for user equipment, then interference coordination is improved, but resource allocation efficiency deteriorates due to unavailable resources for non-hopping users

Engineering Contradiction:

ImproveinterferenceVSAvoidresource allocation efficiency

Core Design Contradiction:

Object-affected harmful factorsVSProductivity

Solution Approach 1:

The resource pool is divided into separate segments for hopping and non-hopping user equipment. This segmentation enables independent resource management for each group, allowing interference coordination within the hopping group while simultaneously providing efficient resource allocation for the non-hopping group without mutual interference.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The base station acts as an intermediary that manages and coordinates resource allocation between hopping and non-hopping user equipment. It maintains separate resource pools and controls access to ensure that interference is minimized while resource allocation efficiency is maximized for both types of user equipment.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Duration of action of stationary object

If frequency hopping resources are allocated in all subframes, then hopping user equipment maintains continuous connectivity, but non-hopping user equipment experiences reduced available bandwidth

Engineering Contradiction:

Improveconnectivity continuityVSAvoidavailable bandwidth

Core Design Contradiction:

Duration of action of stationary objectVSArea of stationary object

Solution Approach 1:

The available bandwidth is segmented into dedicated resource pools: the first resource pool is allocated to hopping user equipment across all subframes to ensure continuous connectivity, while the second resource pool is reserved for non-hopping user equipment. This segmentation ensures both user equipment types have sufficient resources without one group starving the other.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The resource allocation problem is solved by introducing a dimensional separation in the resource space. Instead of competing for the same frequency resources, hopping and non-hopping user equipment are assigned resources in different dimensional segments of the available spectrum, allowing both to operate simultaneously without resource contention.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Data Source

PatentUS8908742B2User equipment, radio base station and methods therein for transmitting information of an allocation of a radio resource

Publication Date: 2014.12.09 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

AI summary

Embodiments herein relate to a method in a radio base station for transmitting information of an allocation of a radio resource allocated to a second user equipment. The radio base station is arranged to serve a first user equipment and the second user equipment in a cell of a radio communications network. The radio resource in the cell comprises Physical Resource Blocks that are organized in radio frames comprising subframes. The radio base station allocates a radio resource to the second user equipment in a subframe of the cell based on a frequency hopping scheme of the first user equipment. Also, the radio base station transmits a message to the second user equipment, which message indicates the allocated radio resource.