RF Handoff Tables for Seamless Multi-Frequency Network Switching
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Solution Overview
Problem
In multi-frequency networks, devices face challenges in efficiently handoff between RF channels due to varying channel conditions, leading to disruptions in content access and user experience, as they may not retain access to common and additional content after a handoff.
Innovation Solution
A handoff system that assembles information about neighboring RF channels and generates seamless and partially seamless handoff tables to determine the best channel for switching, ensuring continued access to desired content by prioritizing channels with the highest signal strength and common content availability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a device randomly hands off to any RF channel that carries the desired content, then the handoff can be performed quickly, but the device may lose access to common and additional content from the current LOI
Solution Approach 1:
The patent applies preliminary action by pre-generating seamless handoff tables that identify and rank RF channels based on their content overlap with the current LOI. Before a handoff is needed, the system analyzes which channels carry the desired content plus maximum common content, so when a handoff event occurs, the device can immediately switch to the pre-identified best channel without losing content access.
Solution Approach 2:
The patent uses feedback by continuously monitoring channel conditions and content availability, then using this information to dynamically update and rank channels in the handoff tables. The system feedback loop ensures that when handoff decisions are made, they are based on current information about which channels will preserve access to common and additional content.
2Loss of information
If the device performs RF handoff to maintain content access, then content availability is preserved, but user experience may be disrupted due to varying channel conditions
Solution Approach 1:
The system performs preliminary evaluation of channel conditions and content availability, ranking potential target channels before handoff is needed. This allows the device to select the most reliable channel in advance, reducing disruptions during the actual handoff execution.
Solution Approach 2:
The patent changes parameters by ranking RF channels based on multiple criteria including content overlap, signal strength, and channel conditions. This multi-parameter approach allows the system to select channels that optimize both content availability and user experience stability, rather than relying on a single parameter.
3Reliability
If the device switches to an RF channel with high signal strength, then connection reliability improves, but the channel may not carry common content with the current LOI
Solution Approach 1:
The patent applies parameter changes by ranking RF channels based on a combination of parameters including content overlap with current LOI, signal strength, and channel conditions. This multi-parameter ranking system ensures that channels selected for handoff satisfy both reliability requirements and content availability requirements simultaneously.
Solution Approach 2:
The system performs preliminary analysis to identify channels that meet both content overlap and signal strength criteria before handoff is needed. The seamless handoff tables are pre-populated with channels that have been evaluated for both parameters, so the device can switch to a channel that satisfies both reliability and content access requirements.
Data Source
AI summary
Methods and apparatus for RF handoff in a multi-frequency network. A method includes detecting a mobility event associated with a detection of a new wide area operating infrastructure (WOI), updating a current WOI identifier to a new WOI identifier, acquiring control channel information associated with the new WOI identifier, determining if an active registered flow list has been updated based on the control channel information, and performing an acquisition procedure to acquire one or more registered flows if it is determined that the active registered flow list has been updated. Another method includes detecting a mobility event associated with a detection of a new local area operating infrastructure (LOI), updating a current LOI identifier to a new LOI identifier, acquiring control channel information, determining if an active registered flow list has been updated, and performing an acquisition procedure to acquire one or more registered flows.