LTE Dedicated Bearer Setup During Handover
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Solution Overview
Problem
Current LTE technology faces challenges in maintaining seamless dedicated bearer establishment during call setup, leading to potential call setup failures due to premature handover requests before the dedicated bearer is established, resulting in degraded user experience.
Innovation Solution
The solution involves delaying the sending of handover requests and adjusting channel priorities to prevent premature handover during call setup, allowing the dedicated bearer to be established before proceeding with the handover, and implementing timers to manage these processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If handover requests are sent during call setup, then mobility is maintained, but call setup fails due to premature handover before dedicated bearer establishment
Solution Approach 1:
The system performs preliminary actions by establishing the dedicated bearer before executing the handover procedure during call setup. The network entity delays the handover request until the dedicated bearer establishment is complete, ensuring the bearer is ready in advance to prevent call setup failure.
Solution Approach 2:
The system dynamically adjusts the timing of handover requests based on the status of dedicated bearer establishment. The network entity monitors the bearer establishment progress and adapts the handover timing accordingly, sending the handover request only when appropriate conditions are met.
2Speed
If handover is prioritized over dedicated bearer establishment, then mobility is maintained, but connection stability deteriorates
Solution Approach 1:
The system performs the dedicated bearer establishment as a preliminary action before executing the handover. This ensures that the connection foundation is solidly established before the handover occurs, maintaining connection stability while still enabling timely mobility transitions.
Data Source
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AI summary
Aspects relate to methods and apparatus for dedicated bearer (DB) establishment handling during call setup for long term evolution. According to aspects, a method is provided herein for wireless communications that may be performed, for example, by a user equipment (UE). The method generally includes establishing a connection with a first access point (AP) to perform a call set up procedure for a call; receiving from the first AP a message associated with handover to a second AP; delaying giving up the call setup procedure for a duration if the message includes or is associated with an indication to release a dedicated bearer; and allowing establishment of a DB with the second AP during the duration. Consequently, the DB can be established with the second AP, without the UE giving up the call setup, and the call can be performed, thus improving user experience. Numerous other aspects are provided.