Radio Access Technology Capability Handling in Wireless Devices
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently handling radio access technology (RAT) capabilities, particularly in scenarios where devices are rejected by networks, leading to unnecessary power consumption and frequency scanning.
Innovation Solution
A communication device and method that disables and switches off rejected RAT capabilities, allowing it to select and register with alternative networks without scanning frequencies, thereby conserving power by switching modems and transceivers to low power or sleep modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the communication device continues to scan frequencies and attempt registration with rejected networks, then it may eventually find an acceptable network, but power consumption increases and registration time is delayed
Solution Approach 1:
The network performs preliminary rejection of incompatible RAT capabilities before the device wastes energy scanning and attempting registration. The rejection message is sent in advance to inform the device which RATs are not supported, preventing unnecessary scanning and power consumption while ensuring the device can quickly find alternative networks.
2Reliability
If the communication device scans all frequencies to find alternative networks, then it ensures comprehensive network selection, but the time to register with an alternative network increases
Solution Approach 1:
The network provides preliminary information about supported RATs in the rejection message, allowing the device to skip scanning frequencies for rejected RATs. This preliminary guidance enables the device to focus only on compatible networks, reducing registration time while maintaining reliable network selection.
Solution Approach 2:
The rejection message extracts and communicates specific information about which RATs are not supported, allowing the device to remove rejected RATs from its scanning list. This extraction of unnecessary scanning targets reduces the time required to find alternative networks while ensuring comprehensive selection among remaining options.
3Adaptability or versatility
If the communication device attempts registration with multiple RATs after rejection, then it increases adaptability to different network conditions, but power consumption and operational complexity increase
Solution Approach 1:
The rejection message extracts and communicates which RAT capabilities are not supported, allowing the device to remove incompatible RATs from its active capability set. This extraction maintains adaptability by preserving support for compatible RATs while eliminating unnecessary power consumption from attempting to use rejected RATs.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A communication device for handling radio access technology (RAT) capabilities comprises instructions of: transmitting a first request message via a cell of a first RAT to a first network to register to the first network; receiving a first reject message from the first network in response to the first request message; disabling the first RAT capability and a second RAT capability in response to the first reject message; searching and selecting a cell of a third RAT of a second network in response to the disabling; transmitting a second request message via the cell of the third RAT to the second network to register to the second network, when selecting the cell of the third RAT; and receiving a second response message via the cell of the third RAT from the second network in response to the second request message.