Heterogeneous Network Resource Management Adjustment

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Solution Overview

Problem

In heterogeneous wireless communication networks, the existing methods for handover management are inefficient due to reliance on delayed and filtered measurements, leading to increased handover failure rates and interference, particularly in environments with non-uniform cell sizes and dynamic signal strength changes.

Innovation Solution

A method where a mobile device transmits a request for cell information and receives corresponding data to adjust resource management procedures, such as handover, uplink power control, and link adaptation, using real-time signal reception information and cell characteristics like size and type, allowing for optimized decision-making.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If L3 filtered measurement values are used for handover decisions, then measurement processing is simplified, but the measurements do not represent real-time link quality due to filtering delay

Engineering Contradiction:

Improvemeasurement processing complexityVSAvoidmeasurement delay

Core Design Contradiction:

Device complexityVSLoss of time

Solution Approach 1:

The patent segments the measurement information into two parts: filtered measurement values (for stable decision-making) and unfiltered raw measurement values (for real-time link quality assessment). This allows the system to use both L3 filtered values for handover decisions and unfiltered values for evaluating current link quality, resolving the contradiction between measurement processing simplicity and real-time accuracy.

Inventive Principle:

Principle #1Segmentation

2Reliability

If the UE reports measurements frequently to the network, then real-time link quality information is available, but UE resources are significantly consumed

Engineering Contradiction:

Improvehandover decision accuracyVSAvoidUE resource consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent enables the UE to perform self-service by locally evaluating handover suitability using unfiltered measurement values without requiring frequent network communication. The UE autonomously determines whether handover is suitable based on real-time link quality assessment, only reporting to the network when handover is actually needed. This reduces UE resource consumption while maintaining reliable handover decisions.

Inventive Principle:

Principle #25Self-service

3Stability of the object's composition

If a large Time-to-Trigger is used in macro cell, then handover stability is improved, but handover is delayed causing higher loss rate and radio link failure

Engineering Contradiction:

Improvehandover stabilityVSAvoidhandover success rate

Core Design Contradiction:

Stability of the object's compositionVSReliability

Solution Approach 1:

The patent implements dynamic adjustment of handover parameters based on cell type. The UE determines whether it is in a macro cell or small cell and applies different Time-to-Trigger values accordingly: larger TTT for macro cells to ensure stability, and smaller TTT for small cells to enable faster handover. This dynamic adaptation resolves the contradiction between handover stability and success rate.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the Time-to-Trigger parameter based on cell characteristics. The network configures different TTT values for different cell types, and the UE adapts the handover evaluation timing accordingly. This parameter adjustment allows the system to maintain stability in macro cells while achieving faster, more reliable handover in small cells.

Inventive Principle:

Principle #35Parameter changes

4Extent of automation

If the UE waits for network confirmation before reporting updated measurements, then network control is maintained, but the reporting time period is extended to hundreds of milliseconds

Engineering Contradiction:

Improvenetwork controlVSAvoidmeasurement reporting speed

Core Design Contradiction:

Extent of automationVSProductivity

Solution Approach 1:

The patent applies preliminary action by having the UE perform unfiltered measurement and handover suitability evaluation before network confirmation is received. The UE proactively assesses whether handover is needed using real-time measurements, and only then reports to the network. This reverses the conventional sequence, improving measurement reporting speed while maintaining network control over the actual handover execution.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentEP2815604B1Methods and devices for adjusting resource management procedures in heterogeneous communication networks

Publication Date: 2018.12.19 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

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AI summary

Devices and methods for adjusting resource management procedures in heterogeneous communication networks (105) are disclosed. In one aspect, a method for adjusting radio resource management procedures in a mobile device (120) communicating with a node (110, 115) operating in a cell in a heterogeneous communication network (105) includes transmitting a first message to the node (705, 1205), the first message including a request for cell information, receiving (710, 1210) a second message transmitted from the node, the second message including the requested cell information, measuring (715, 1215) signal reception information, processing the received cell information and measured signal reception information to determine an adjustment to a radio resource management procedure, and adjusting (725, 1225) the radio resource management procedure based on the determined adjustment. The first and second messages may be radio resource control RRC messages, such as RRC connection request and response messages.