Wireless Device Handover Using Pre-Stored Network Context
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face delays and performance degradation during handovers between different communication systems due to the lack of readily available network information, which can lead to delays in establishing communication links and sessions.
Innovation Solution
The method involves storing network information, such as identity, mobility state, and communication session parameters, on the wireless device during the initial handover from a first communication system to a second system, allowing for seamless handovers back to the first system by providing this information when needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If network information is retrieved from other network elements during handover, then complete network information can be obtained, but handover delays increase and performance degrades
Solution Approach 1:
The patent applies preliminary action by storing network information (context information, session parameters, mobility state) at the wireless device during the initial handover from first communication system to second communication system. This pre-stored information is then readily available for seamless handovers back to the first system, eliminating the need for real-time retrieval and thus reducing handover delays while maintaining information completeness
2Speed
If network information is stored at the wireless device, then handover speed improves, but device memory requirements and complexity increase
Solution Approach 1:
The patent extracts only the essential network information needed for handover operations (context information, session parameters, mobility state) and stores it at the wireless device. This selective extraction approach enables fast handovers while minimizing the storage burden and complexity at the device, avoiding the need to store all possible network data
3Reliability
If network information is provided to first communication system for second handover, then handover seamless is achieved, but network signaling overhead increases
Solution Approach 1:
The patent uses copying by providing the pre-stored network information from the wireless device to the first communication system during the second handover. This copying approach enables seamless handover restoration while minimizing signaling overhead, as the information is already formatted and available, eliminating the need for complex real-time information exchange protocols
Data Source
Figure 1
Figure 2
Figure 3
AI summary
An indication is received from a wireless device in communication with a first communication system using a first radio access technology that the wireless device has detected a second communication system using a second access technology. Network information of the first communication system is provided and stored at the wireless device when performing a first handover of the wireless device from the first communication system to the second communication system. The network information is provided to the first communication system to perform a second handover from the second communication system to the first communication system.