Dynamic Modulation Paging Based on UE Location

Solution Overview

Problem

In wireless communication systems, particularly LTE networks, paging requests consume significant data resources, leading to reduced data connectivity and performance for other users when sent using modulation schemes with low bits-per-symbol ratios, and are susceptible to interference when using higher bits-per-symbol ratios, especially when multiple paging requests are sent across multiple cells.

Innovation Solution

Implementing dynamic modulation schemes based on the distance of the paging area from the cell where the user equipment (UE) last registered, using a lower bits-per-symbol ratio for initial paging requests in closer cells and higher bits-per-symbol ratios for subsequent requests in more distant cells to minimize resource consumption and maximize reception probability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If paging requests are sent using modulation schemes with low bits-per-symbol ratios, then reliability of paging delivery is improved, but data resource consumption increases and data connectivity for other users deteriorates

Engineering Contradiction:

Improvepaging delivery reliabilityVSAvoiddata resource consumption

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The patent applies local quality by selecting different modulation schemes for different paging areas based on the UE's last registered cell. Cells closer to the UE's last location use lower bits-per-symbol ratios for higher reliability, while distant cells use higher bits-per-symbol ratios to conserve data resources. This spatially differentiated approach optimizes both reliability and resource consumption locally rather than uniformly across all cells.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent implements dynamics by dynamically selecting the modulation scheme based on real-time conditions - specifically the UE's last registered cell location and the current cell being paged. The system adapts the bits-per-symbol ratio dynamically rather than using a static approach, allowing optimization of both reliability and resource consumption based on the specific paging scenario.

Inventive Principle:

Principle #15Dynamics

2Loss of energy

If paging requests are sent using modulation schemes with high bits-per-symbol ratios, then data resource consumption is reduced, but susceptibility to interference increases and paging delivery reliability deteriorates

Engineering Contradiction:

Improvedata resource consumptionVSAvoidpaging delivery reliability

Core Design Contradiction:

Loss of energyVSReliability

Solution Approach 1:

The patent applies local quality by selecting different modulation schemes for different paging areas based on the UE's last registered cell. Cells closer to the UE's last location use lower bits-per-symbol ratios for higher reliability, while distant cells use higher bits-per-symbol ratios to conserve data resources. This spatially differentiated approach optimizes both reliability and resource consumption locally rather than uniformly across all cells.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent changes the modulation parameter (bits-per-symbol ratio) based on the distance between the paging cell and the UE's last registered cell. By adjusting this parameter dynamically - using lower ratios for close cells and higher ratios for distant cells - the system optimizes the trade-off between reliability and resource consumption.

Inventive Principle:

Principle #35Parameter changes

3Reliability

If multiple paging requests are sent across multiple cells, then the probability of successful delivery is improved, but data resource consumption increases

Engineering Contradiction:

Improvepaging delivery probabilityVSAvoiddata resource consumption

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The patent applies local quality by selecting different modulation schemes for different paging areas based on the UE's last registered cell. Cells closer to the UE's last location use lower bits-per-symbol ratios for higher reliability, while distant cells use higher bits-per-symbol ratios to conserve data resources. This spatially differentiated approach optimizes both reliability and resource consumption locally rather than uniformly across all cells.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent implements partial action by sending paging requests to multiple cells with differentiated modulation schemes rather than uniformly to all cells. The system sends requests to a broader area than strictly necessary but uses higher modulation schemes in distant cells to reduce resource consumption, achieving a balance between thoroughness and efficiency.

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS8954097B1Methods and systems for implementing dynamic modulation schemes based on paging area

Publication Date: 2015.02.10 SPRINT SPECTRUM LLC

AI summary

Disclosed herein are methods and systems for implementing dynamic modulation schemes based on paging area. In one embodiment, a radio access network (RAN) receives a request to page a user equipment (UE), and identifies the cell in which the UE was last registered. The RAN sends one or more paging requests in one or more cells, where the respective modulation coding scheme (MCS) that the RAN selects for each such paging request depends at least in part on the distance of the receiving cell from the cell in which the UE was last registered.