RSD Selection Timer for Higher-Priority PDU Session Retry
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in establishing PDU sessions with the highest priority RSD due to network rejections, leading to reduced user experience, data rates, reliability, and increased latency.
Innovation Solution
Implementing a high priority route selection descriptor (RSD) selection timer that allows the UE to retry establishing a PDU session with the highest RSD priority after a timer expiration, even if initially accepted with a lower priority, thereby enabling quicker transition to optimal network resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE establishes a PDU session with a lower priority RSD due to network rejection of higher priority RSD, then the PDU session can be established, but the user experience, data rates, reliability, and latency are degraded
Solution Approach 1:
The UE initiates a retry procedure with a higher priority RSD after a predetermined time period following initial network rejection. This preliminary action allows the system to proactively attempt establishing a better quality connection before the lower priority session fully stabilizes, potentially improving both reliability and reducing latency by securing optimal network resources sooner.
2Reliability
If the UE continuously retries establishing PDU session with highest priority RSD after network rejection, then the highest RSD priority can be achieved, but unnecessary signaling overhead and network resource consumption occur
Solution Approach 1:
The UE implements a periodic retry mechanism where it waits for a predetermined time period after initial network rejection before attempting to re-establish the PDU session with the highest priority RSD. This periodic action balances the need for high priority connection establishment with the reduction of excessive signaling overhead, as the retry is neither immediate nor continuous but occurs at controlled intervals.
3Productivity
If the UE accepts a PDU session with lower priority RSD immediately upon network rejection, then the session establishment is faster, but the quality of service and network resource utilization are suboptimal
Solution Approach 1:
Instead of immediately accepting the lower priority RSD session, the UE performs a preliminary wait action for a predetermined time period before finalizing the session establishment. This preliminary pause allows the network conditions to potentially improve and the higher priority RSD to become available, thereby securing better quality of service without significantly delaying the overall session establishment process.
Data Source
Figure 1
Figure 2
Figure 3
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.