Expedited Retransmission for Call Setup
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Solution Overview
Problem
Existing telecommunications systems experience delays during call setup when handovers or redirections occur, particularly due to the use of default retransmission times that can be unnecessary and burdensome on networks.
Innovation Solution
Implementing an expedited retransmission time mechanism that is shorter than default retransmission times, selectively based on network conditions such as congestion and interference levels, to facilitate faster call setup when handovers or redirections happen during call setup procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If default retransmission time is used during call setup, then network stress is reduced, but call setup time increases
Solution Approach 1:
The patent applies dynamics by making the retransmission time adaptive rather than fixed. The system dynamically adjusts the retransmission time based on network conditions, using shorter intervals when the network can handle the load and longer intervals when stress needs to be reduced. This resolves the contradiction by allowing call setup time to be minimized when possible while still protecting the network when necessary.
Solution Approach 2:
The patent changes the parameter of retransmission time from a static default value to a variable that can be adjusted based on network conditions. By monitoring network status and modifying the retransmission time parameter accordingly, the system achieves faster call setup when network conditions permit while preventing excessive network stress when conditions deteriorate.
2Productivity
If expedited retransmission time is used during call setup, then call setup time decreases, but network stress increases
Solution Approach 1:
The system dynamically adjusts retransmission timing based on real-time network conditions. When network capacity is sufficient, expedited retransmission times are used to improve call setup efficiency. When network stress indicators rise, the system automatically extends retransmission intervals, thereby maintaining productivity while preventing harmful network overload.
Solution Approach 2:
The patent implements feedback mechanisms that monitor network conditions and use this information to adjust retransmission timing. The system continuously receives feedback about network status and modifies its retransmission strategy accordingly, enabling it to achieve high call setup efficiency when the network can support it while avoiding excessive stress when capacity is limited.
3Speed
If shorter retransmission time is used, then call setup speed increases, but reliability of successful call establishment decreases
Solution Approach 1:
The patent applies dynamics by adjusting retransmission time intervals based on network conditions rather than using a fixed short interval. When network conditions are favorable, shorter intervals are used to increase call setup speed. When conditions deteriorate, the system extends intervals to ensure reliable delivery, thereby maintaining both speed and reliability according to current network capacity.
Solution Approach 2:
The system prepares for potential failures by monitoring network conditions in advance and adjusting retransmission timing before problems occur. When network stress is detected, the system proactively extends retransmission intervals to cushion against potential message loss, ensuring reliable call establishment while still maintaining efficient speed when conditions permit.
Data Source
AI summary
Systems, devices, and techniques described herein relate to selectively implementing an expedited retransmission time. In some examples, a call setup message is transmitted to a first network system associated with a first network access technology. A transfer request may be received from the first network system. The transfer request may indicate handover or redirection to a second network system associated with a second network access technology. Upon expiration of the expedited retransmission time after receiving the transfer request, the call setup message can be retransmitted to the second network system.