Frequency Band Selection in Wireless Handover
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication networks that support multiple radio access technologies, seamless transitions between technologies are crucial for maintaining communication sessions, but existing systems often fail to confirm the wireless device's ability to establish communication over the new technology, leading to session disruptions and delays.
Innovation Solution
The system determines a wireless device's mobility and application requirements and sends a message to the device with information about secondary and tertiary frequency bands using a different radio access technology, allowing it to switch seamlessly based on these criteria, ensuring continuous communication without scanning for additional channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the system sends a message with information about multiple frequency bands before handover, then the handover reliability is improved, but the network signaling overhead increases
Solution Approach 1:
The system performs preliminary actions by sending a message containing information about multiple candidate frequency bands (second and third frequency bands) before the actual handover occurs. This allows the wireless device to evaluate its ability to communicate on these bands in advance, ensuring a reliable handover without last-minute scanning delays. The message is sent when the signal level of the current band meets handover criteria, proactively preparing the device for transition.
2Adaptability or versatility
If the wireless device scans for additional channels during handover, then the adaptability to new frequency bands is improved, but the handover time increases
Solution Approach 1:
The system provides the wireless device with information about candidate frequency bands in advance through a message before handover. This preliminary action eliminates the need for time-consuming channel scanning during the handover process, as the device already has the necessary information to evaluate and switch to appropriate bands based on its mobility and application requirements.
Solution Approach 2:
The wireless device uses its own mobility and application requirement information to autonomously determine which frequency band to switch to, without requiring extensive network control or scanning. The device self-evaluates its ability to communicate on the provided bands and makes the selection independently, reducing handover time while maintaining adaptability.
Data Source
AI summary
In systems and method of frequency band selection, a mobility and an application requirement of an application running on a wireless device are determined for a wireless device in communication with an access node over a first frequency band using a first radio access technology. When it is detecting that a signal level of the first frequency band meets a handover criteria, a message is sent to the wireless device comprising information of a second frequency band and a third frequency band, wherein the second and third frequency bands use a second radio access technology. The wireless device is instructed to communicate with the access node using one of the second and third frequency bands based on the determined mobility and application requirement.