User Equipment Wireless Service Utilization Optimization
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Solution Overview
Problem
In wireless communication networks, user equipment (UE) experiences data stalls due to reaching maximum numbers of UEs or PDU sessions per network slice, leading to service disruptions, as existing technologies lack effective methods to manage network slice admission control and optimize service utilization.
Innovation Solution
The UE employs methods to dynamically switch between different radio access technologies (RATs) and access types, such as LTE or N3GPP, and prioritizes PLMNs to access available network slices, thereby avoiding data stalls by rerouting internet PDUs over alternative access types or networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the NSACF rejects NSSAI or PDU sessions when maximum number of UEs or PDU sessions are reached, then network slice admission control is enforced, but data stalls occur and service continuity is disrupted
Solution Approach 1:
The UE dynamically switches between different RATs (5G NR and LTE) and access types (3GPP and non-3GPP) based on network slice availability. When the primary 5G NR access is rejected due to maximum UE/PDU limits, the UE transitions to alternative accesses to maintain service continuity, making the system adaptive rather than static
Solution Approach 2:
The UE changes the access parameters by switching between different RATs and access types. When 5G NR access is blocked, the UE modifies its communication parameters to use LTE or non-3GPP accesses, effectively changing the operational state to bypass the admission control rejection
2Device complexity
If the UE remains on a single RAT (5G NR) and access type (3GPP), then network optimization is simplified, but service availability is reduced when maximum limits are reached
Solution Approach 1:
The UE is configured with multiple RATs and access types that can serve the same network slices. The system achieves multi-functionality where 5G NR, LTE, and non-3GPP accesses can all provide data services, allowing the UE to switch between them based on availability without requiring complex external network management
3Loss of energy
If no alternative access types are available when 5G NR access is rejected, then network resources are optimized, but permanent data stalls occur
Solution Approach 1:
The UE is pre-configured with multiple RATs and access types as backup options before any rejection occurs. This beforehand preparation ensures that when 5G NR access is rejected due to maximum limits, the UE immediately has alternative paths available, preventing data stalls before they can occur
Data Source
AI summary
A method for communication by a UE in a wireless communication system is provided. The method may comprise sending a first request message to access a data service over a first NSSAI and a voice service over a second NSSAI to a first 3GPP RAT of a first PLMN; receiving a first response message indicating a rejection for establishing an internet PDU session with the first 3GPP RAT of the first PLMN; and determining, for accessing the data service or both the data service and the voice service, one of a second 3GPP RAT of the first PLMN, the first 3GPP RAT of a second PLMN, a N3GPP RAT of the second PLMN, or an N3GPP RAT of the first PLMN