UE RSD Storage for Session Re-establishment Latency
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Solution Overview
Problem
In wireless communications, user equipment (UE) experiences increased latency and inefficiency when re-establishing data sessions after going out of service, as it often cycles through multiple route selection descriptors (RSDs), including previously rejected ones, upon re-acquiring service.
Innovation Solution
The UE stores a previously accepted RSD for future session establishment requests, allowing it to reuse this successful RSD instead of re-transmitting rejected ones, thereby reducing the need for repeated session establishment procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE cycles through multiple RSDs to re-establish a data session after going out of service, then the session establishment may eventually succeed, but the latency is increased and the process becomes inefficient
Solution Approach 1:
The UE performs preliminary action by storing the successful RSD in memory during the initial session establishment phase. When the UE goes out of service and re-acquires service, it retrieves the pre-stored successful RSD and uses it immediately for session re-establishment, avoiding the need to cycle through multiple RSDs again. This preliminary storage and retrieval mechanism significantly reduces latency while maintaining high success rates.
2Ease of operation
If the UE re-transmits previously rejected RSDs upon re-acquiring service, then it follows the standard session establishment procedure, but resource usage increases and spectral efficiency decreases
Solution Approach 1:
The UE applies discarding and recovering by discarding previously rejected RSDs from the re-establishment process and recovering the successful RSD from memory storage. Instead of re-transmitting all RSDs including rejected ones, the UE recovers only the successful RSD that was stored earlier, thereby reducing resource usage and improving spectral efficiency while maintaining procedural simplicity.
3Productivity
If the UE stores a previously accepted RSD for future use, then latency is reduced and efficiency improves, but additional memory storage is required
Solution Approach 1:
The UE applies local quality by allocating specific memory storage resources locally within the UE device for storing the successful RSD. Rather than requiring extensive memory resources, the solution uses a dedicated, localized storage area that holds only the critical successful RSD information needed for rapid re-establishment. This localized approach minimizes the quantity of memory substance required while maximizing productivity.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. In some systems, a user equipment (UE) may attempt to establish a data session with a base station. The UE may transmit one or more session request messages including one or more route selection descriptors (RSDs) to the base station, and the UE may determine a successful RSD that may be compatible with the network based on a session accept message received from the base station. The UE may store the successful RSD at a location in memory for use in future session establishment procedures. For example, the UE may go out of service, and may re-acquire service with the same network. In such cases, the UE may transmit a session request message including the previously-accepted RSD to re-establish a data session with the base station.