Pre-registration Session Storage for Wireless Handoff Efficiency
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Solution Overview
Problem
Conventional pre-registration and re-registration processes in wireless communication systems result in unnecessary session transfers and resource consumption when an access terminal moves between different radio access technology areas, leading to excessive handoff interruptions and backhaul traffic.
Innovation Solution
Implementing a method where pre-registration session information is stored and reused when available, with a timer to manage its validity, allowing access terminals to efficiently transition between radio access technology areas by reusing existing session information and minimizing redundant registration processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If pre-registration session information is deleted when the access terminal exits the pre-registration zone, then memory space is freed, but unnecessary pre-registrations and session transfers occur when the terminal re-enters the zone
Solution Approach 1:
The patent applies preliminary action by pre-registering the access terminal in the target RAT coverage area before actual handoff is needed. The pre-registration session information is obtained and stored in advance when the terminal enters the pre-registration zone, so that when the terminal later re-enters or needs to handoff to that RAT, the registration is already complete and can be quickly activated without performing the full pre-registration process again.
2Productivity
If pre-registration session information is stored and reused, then handoff efficiency is improved, but network resources are consumed for maintaining stored information
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the validity period of stored pre-registration session information through a timer mechanism. The session information is maintained only for a limited time window, after which it expires and is deleted. This transforms the storage resource usage from a permanent state to a temporary, time-limited state, optimizing the balance between handoff efficiency and network resource consumption.
3Reliability
If conventional pre-registration is performed each time the terminal enters the pre-registration zone, then session information freshness is ensured, but excessive handoff interruptions and backhaul traffic occur
Solution Approach 1:
The patent applies preliminary action by completing the pre-registration process in advance when the terminal first enters the pre-registration zone. The obtained session information is stored and can be reused for subsequent handoffs to the same target RAT, eliminating the need to repeatedly perform the full pre-registration process. This preliminary registration reduces handoff interruptions and backhaul traffic while maintaining session information validity through the timer mechanism.
Data Source
AI summary
Example embodiments are directed to a system and methods of pre-registration, storing of pre-registered session information and session transfer, which may occur when an access terminal is in close proximity to a border area between a first radio access technology (RAT) area and a second RAT area. A method includes obtaining pre-registration session information if an access terminal enters a pre-registration zone, starting a pre-registration session information timer associated with the obtained pre-registration session information, and storing the obtained pre-registration session information until the associated pre-registration information timer expires. Further, both an access terminal and an access network include one or more memories configured to store more than one group of pre-registration session information and more than one timer. Each of the timers are associated with a corresponding set of pre-registration session information.