High-Priority RSD Selection Timer for Adaptive PDU Switching
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Solution Overview
Problem
In wireless communication systems, establishing a PDU session with a high priority route selection descriptor (RSD) can be challenging due to network resource constraints, leading to suboptimal user experiences, reduced data rates, and increased latency.
Innovation Solution
Implementing a high priority RSD selection timer that allows a user equipment (UE) to initiate a PDU session establishment request with the highest RSD priority after a timer expiration, even if an initial session is established with a lower priority, thereby enabling a switch to a higher priority RSD.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE establishes a PDU session with a lower RSD priority due to network resource constraints, then the session establishment succeeds, but the data rate and quality of service are reduced
Solution Approach 1:
The patent implements a dynamic RSD priority selection mechanism where the UE can switch from a lower priority RSD to a higher priority RSD based on timer expiration and network conditions. The system transitions from a static session establishment to a dynamic re-evaluation process, allowing the UE to attempt higher priority RSDs after the initial session is established with a lower priority RSD.
Solution Approach 2:
The patent applies preliminary action by implementing a timer mechanism that triggers a re-evaluation of RSD priority before finalizing the session establishment. The UE performs preliminary checks and attempts to establish sessions with higher priority RSDs before settling for lower priority options, rather than immediately accepting the first available session.
2Speed
If the UE immediately establishes a PDU session with available network resources, then the session establishment is fast, but the latency increases due to suboptimal route selection
Solution Approach 1:
The patent implements periodic action through a timer mechanism that periodically re-evaluates the RSD priority after session establishment. The UE establishes the session quickly with available resources, then periodically checks whether a higher priority RSD becomes available, balancing immediate connectivity with optimized route selection over time.
3Reliability
If the UE attempts to establish a PDU session with the highest RSD priority immediately, then the quality of service is optimized, but the session establishment may fail due to network resource constraints
Solution Approach 1:
The patent applies partial action by having the UE attempt to establish a PDU session with a higher priority RSD than currently available, even though this may initially fail. The UE performs this partial attempt (rather than waiting for certainty), and if successful, achieves better QoS. The mechanism allows for excessive action in terms of priority selection, then falls back to lower priority if the higher priority attempt fails.
4Reliability
If the UE maintains a PDU session with a lower priority RSD to ensure connectivity, then the connection reliability is maintained, but the user experience deteriorates due to reduced performance
Solution Approach 1:
The patent implements feedback through a timer-based re-evaluation mechanism that continuously monitors the session status and network conditions. The UE receives feedback about the current RSD priority and network availability, then adjusts the session establishment strategy accordingly, attempting to switch to higher priority RSDs when conditions improve, thereby enhancing user experience while maintaining connection reliability.
Data Source
AI summary
This disclosure provides systems, methods and apparatuses for a high priority route selection descriptor (RSD) selection timer. A protocol data unit (PDU) session may be established for an application associated with a user equipment (UE). If the PDU session is associated with a lower RSD priority than the highest RSD priority for the application, the UE may initiate an RSD selection timer. After expiration of the RSD selection timer, the UE may try to establish another PDU session for the application with the highest RSD priority for the application. If another PDU session with the highest RSD priority is accepted, the UE may release the initial PDU session with the lower RSD priority and establish a new PDU session with the highest RSD priority. Such implementations may increase data rates, quality of service, and reliability for the application, decrease latency of the application, or decrease power consumption of the UE.