Wireless Node Signal Switching via Candidate List Management

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Solution Overview

Problem

Wireless communication systems face challenges in seamlessly switching between available radio frequencies to maintain optimal signal strength and desired services, particularly when the reception margin of the current signal falls below a certain threshold.

Innovation Solution

A wireless node or computer creates a candidate signal list, measures the strength of candidate signals, and calculates average differences to determine when to switch to the strongest signal from the list, ensuring continuous service by dynamically adjusting measurement frequencies and updating the signal list based on changing conditions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the wireless node continuously monitors and measures candidate signals to ensure optimal signal switching, then the reliability of wireless communication is improved, but the power consumption increases

Engineering Contradiction:
Improvesignal qualityVSAvoidpower consumption
Core Design Contradiction:
ReliabilityVSUse of energy by moving object

Solution Approach 1:

The system pre-creates a candidate signal list with multiple potential signals before the current signal fails. When signal quality degrades, the node can immediately switch to a pre-identified candidate signal, avoiding the need for continuous real-time scanning and measurement of all possible signals. This preliminary preparation maintains reliability while reducing ongoing power consumption.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

Instead of continuously monitoring all candidate signals, the system performs measurements at periodic intervals and based on trigger events (when reception margin falls below a threshold). The node periodically updates the candidate signal list and performs measurements only when necessary, rather than maintaining constant monitoring, thus reducing power consumption while maintaining adequate signal quality assurance.

Inventive Principle:
Principle #19Periodic action

2Adaptability or versatility

If the wireless node performs frequent measurements and updates of candidate signal lists, then the adaptability to changing signal conditions is improved, but the processing complexity increases

Engineering Contradiction:
Improvesignal switchingVSAvoidprocessing complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The system focuses measurement and processing resources on specific candidate signals that are most likely to be useful, rather than uniformly processing all possible signals. The candidate signal list prioritizes signals based on preliminary criteria, and detailed measurements are performed only on these selected candidates, reducing overall processing complexity while maintaining adaptability.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The system performs measurements and updates at a frequency that is sufficient to maintain adaptability but not excessively frequent. Instead of continuously updating the candidate signal list and measuring all signals, the system performs partial updates based on changing conditions, performing measurements only when the reception margin threshold is breached or at scheduled intervals, thus balancing adaptability with processing complexity.

Inventive Principle:
Principle #16Partial or excessive action

Data Source

PatentUS7821997B2Computer implemented method, system, and intergrated circuitry for determining a characteristic of a received signal to have fallen beneth a threshold
Publication Date: 2010.10.26 WSOU INVESTMENTS LLC
  • US7821997B2 patent drawing
  • US7821997B2 patent drawing
  • US7821997B2 patent drawing

AI summary

Systems and methods applicable, for instance, in wireless communications. For example, a wireless node and/or other computer may act to create a candidate signal list and/or may act to measure strength for one or more candidate list signals. As another example, the wireless node and/or other computer may act to calculate average difference between the strength of the strongest signal of the candidate list and the strength of a currently-received signal. As yet another example, the wireless node and/or other computer may act to perform one or more operations to employ the strongest signal of the candidate list in place of the currently-received signal.