Multi-RAT Interference Avoidance via Preemptive Service Selection

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Multi-active communication devices face interference issues between radio access technologies (RATs) due to the proximity of RF resources, leading to receiver desensitization and degraded performance, as existing solutions like transmit blanking and frequency band avoidance are ineffective in all scenarios and often compromise the performance of one RAT to improve another.

Innovation Solution

The device determines the likelihood of coexistence interference between RATs and acquires service with non-interfering RATs by using interference data tables, prioritizing RATs, and switching to alternative frequency bands or RATs that do not interfere, ensuring consistent high-quality service.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple RF resources are used simultaneously for different RATs, then service coverage and connectivity are improved, but receiver desensitization and interference occur due to proximity of antennas

Engineering Contradiction:

Improveservice coverageVSAvoidreceiver desensitization

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The patent applies preliminary action by determining the likelihood of coexistence interference between RATs before acquiring service. The device uses interference data tables to preemptively identify interfering RAT combinations and selects non-interfering RATs in advance, preventing receiver desensitization before it occurs while maintaining multi-RAT service coverage.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If transmit blanking is used to avoid interference, then victim RAT performance is improved, but aggressor RAT service continuity is degraded

Engineering Contradiction:

Improvevictim RAT performanceVSAvoidaggressor RAT service continuity

Core Design Contradiction:

ReliabilityVSDuration of action of stationary object

Solution Approach 1:

The patent extracts the interfering RAT from the service acquisition process by identifying and excluding RATs that would cause coexistence interference. Instead of blanking the aggressor RAT during operation, the system proactively selects only non-interfering RAT combinations, allowing both RATs to operate continuously without transmit blanking interruptions.

Inventive Principle:

Principle #2Taking out (Extraction)

3Object-affected harmful factors

If frequency band avoidance is used to prevent interference, then coexistence interference is reduced, but service quality and available bands are compromised

Engineering Contradiction:

Improvecoexistence interferenceVSAvoidservice quality

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The patent changes the parameter selection approach by using interference data tables that contain pre-determined non-interfering frequency band combinations for different RATs. The system queries these tables to select frequency bands that maintain service quality while avoiding coexistence interference, rather than simply avoiding frequency bands.

Inventive Principle:

Principle #35Parameter changes

4Adaptability or versatility

If all available RATs are acquired simultaneously, then service diversity is maximized, but interference likelihood increases

Engineering Contradiction:

Improveservice diversityVSAvoidinterference likelihood

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent introduces interference data tables as an intermediary mechanism between the device and multiple RATs. These tables provide pre-determined non-interfering RAT combinations, allowing the device to acquire service with multiple RATs (maximizing service diversity) while the intermediary guidance prevents selection of interfering combinations (minimizing interference likelihood).

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS9467865B2Avoidance of interference during simultaneous multi-active technologies in global mode

Publication Date: 2016.10.11 QUALCOMM INC

AI summary

Various embodiments implemented on a mobile communication device leverage the availability of multiple RATs to receive service from a combination of RATs that avoids the potential for inter-RAT coexistence interference. A mobile communication device processor may determine whether there is a likelihood of inter-RAT coexistence interference between a first RAT and a second RAT. In response to determining that there is a likelihood of interference occurring between the first RAT and the second RAT, the device processor may attempt to receive service with the first RAT and a third RAT that will not interfere with the first RAT. The device processor may monitor conditions to recognize when the likelihood of interference no longer exists between the first RAT and the second RAT, and reestablish service with the second RAT when that happens. Thus, the device processor may ensure that service is only acquired with non-interfering RATs.