Mobile Node Re-registration Using Positioning Information
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Solution Overview
Problem
Mobile devices experience communication disruption and battery drain due to frequent registrations and re-registrations with mobility agents when moving between radio transceivers, even when both signals are strong enough to support packet-data communication, leading to unnecessary handoffs and resource consumption.
Innovation Solution
A method where a mobile node determines if it is traveling by using positioning information and signal strength changes, deciding whether to re-register with a stronger radio transceiver only if it is moving, thereby avoiding unnecessary re-registrations when stationary and receiving sufficient signals from both transceivers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the mobile node automatically re-registers with the second mobility agent when detecting a stronger radio signal, then the mobile node maintains optimal signal connection, but frequent unnecessary re-registrations occur when both signals are strong enough, causing communication disruption and battery drain
Solution Approach 1:
The patent changes the decision parameter from purely signal strength comparison to a composite criterion that includes whether the second signal exceeds the first by a threshold margin (e.g., 3 dB). This parameter modification prevents unnecessary re-registrations when both signals are sufficiently strong, reducing battery consumption while maintaining connection quality.
Solution Approach 2:
The patent introduces an intermediary decision-making layer between signal detection and re-registration action. Instead of directly re-registering upon detecting a stronger signal, the mobile node evaluates multiple conditions (signal strength difference threshold, current registration state) before triggering re-registration, acting as a mediator to filter out unnecessary handoffs.
2Reliability
If the mobile node frequently re-registers with different mobility agents based on signal strength, then the mobile node maintains optimal connectivity, but network resources are consumed and communication disruption increases
Solution Approach 1:
The patent modifies the re-registration trigger condition by introducing a signal strength difference threshold parameter. Re-registration only occurs when the second signal exceeds the first by this threshold margin, reducing unnecessary network signaling and resource consumption while maintaining adequate connectivity.
Solution Approach 2:
The patent applies partial action by not always re-registering when a stronger signal is detected. Instead, it selectively re-registers only when the signal advantage is sufficient (exceeds threshold), avoiding excessive re-registration actions that waste network resources while maintaining adequate connectivity.
3Ease of operation
If the mobile node uses simple signal strength comparison to decide re-registration, then the decision process is simple and fast, but unnecessary re-registrations occur when both signals are strong enough, causing communication disruption
Solution Approach 1:
The patent enhances the simple signal strength comparison by adding a threshold margin parameter (e.g., 3 dB difference). This modified criterion remains computationally simple and fast to evaluate while effectively preventing unnecessary re-registrations, thus maintaining communication continuity without significantly complicating the decision process.
Data Source
AI summary
Methods and systems are provided for use of positioning information to determine whether to trigger a packet-data-network re-registration when detecting multiple radio signals of sufficient strength. A mobile node registers with a first mobility agent, wherein the mobile node communicates with the first mobility agent via a first radio transceiver. The mobile node determines that a first signal strength of a first radio signal from the first radio transceiver and a second signal strength of a second radio signal from a second radio transceiver are each greater than a first threshold and that the second signal strength is greater than the first signal strength, and responsively determines whether or not it is traveling. If the mobile node determines that it is traveling, the mobile node registers with a second mobility agent, wherein the mobile node communicates with the second mobility agent via the second radio transceiver.