LTE Fallback Management with Network Slice QoS Preservation
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Solution Overview
Problem
LTE networks lack awareness of network slicing, leading to inadequate Quality of Service (QoS) when wireless devices transition from 5G to LTE due to overheating, resulting in poor user experience for services requiring specific QoS parameters.
Innovation Solution
Wireless devices inform the LTE core network of their current network slice parameters when overheating, allowing the Mobility Management Entity (MME) to set a performance profile for the LTE session, ensuring appropriate QoS parameters are applied.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If wireless devices transition from 5G to LTE due to overheating, then device temperature is reduced, but Quality of Service parameters such as bandwidth and latency deteriorate
Solution Approach 1:
The system performs preliminary actions by notifying the LTE core network of the device's current network slice parameters before the actual fallback occurs. This allows the MME to pre-configure the appropriate performance profile and QoS parameters for the LTE session, ensuring that when the device transitions due to overheating, the service quality is maintained at levels consistent with the original 5G network slice requirements.
2Device complexity
If LTE core network establishes session without network slice parameters, then session establishment is simplified, but service requirements for video streaming and voice calls are not met
Solution Approach 1:
The wireless device acts as an intermediary by forwarding its current network slice parameters to the LTE core network's MME. This intermediary role enables the MME to obtain the necessary QoS information without requiring direct integration or complex signaling between 5G and LTE core networks, thus maintaining relatively simple session establishment procedures while ensuring that service requirements are properly communicated and fulfilled.
3Adaptability or versatility
If LTE session uses generic performance profile, then network compatibility is improved, but user experience for specific services deteriorates
Solution Approach 1:
The system applies local quality by configuring the LTE session with a customized performance profile that is specific to the device's current network slice requirements rather than using a generic profile for all devices. This allows the MME to tailor QoS parameters such as bandwidth guarantees and latency constraints to match the specific service needs (e.g., video streaming, voice calls) that the device is currently utilizing, thereby maintaining high user experience while still ensuring broad network compatibility through the standardized fallback mechanism.
Data Source
AI summary
Systems and methods are provided for managing LTE fallback for wireless devices. The methods include monitoring the temperature of a wireless device and determining that the wireless device is using a network slice. The methods further include transmitting a notification from the wireless device indicating the temperature of the wireless device and indicating parameters for the network slice in response to the temperature of the wireless device rising to meet a first temperature threshold. The methods further include establishing an LTE session for the wireless device in accordance with a performance profile for the wireless device based, at least in part, on the parameters for the network slice.