Short Data Bursts Reduce VoIP Call Setup Latency
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Solution Overview
Problem
Current wireless communication systems experience latency during call setup due to the need for wireless devices to establish traffic channels before exchanging Session Initiation Protocol (SIP) messages, which introduces delays in establishing sessions, especially noticeable in Voice over Internet Protocol (VoIP) voice calls.
Innovation Solution
Implementing short data bursts (SDBs) over the air interface signaling channel to initiate and establish sessions between wireless devices, allowing them to communicate without first establishing traffic channels, thereby reducing latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wireless devices establish traffic channels before exchanging SIP messages, then reliable communication is ensured, but call setup latency increases
Solution Approach 1:
The system performs preliminary actions by pre-establishing traffic channels and maintaining them in a dormant state with allocated resources before actual data transmission is needed. This allows the communication path to be ready in advance, eliminating the need for channel establishment during the call setup phase while keeping resources reserved for immediate use.
Solution Approach 2:
The traffic channel transitions from an active state during normal communication to a dormant state during idle periods, yet maintains its resource allocation. This dynamic state change allows the system to reduce latency during call setup by having pre-configured channels available, while still managing network resources efficiently through state transitions.
2Loss of time
If traffic channels are established and maintained continuously, then call setup latency is reduced, but network resource consumption increases
Solution Approach 1:
The system performs preliminary channel establishment only when needed, maintaining channels in a dormant state with resources allocated but not actively consuming full bandwidth. This allows fast call setup when required while avoiding continuous full resource consumption during idle periods.
Solution Approach 2:
The traffic channel dynamically transitions between active and dormant states based on communication needs. During dormant state, resources are reserved but not fully consumed, enabling low-latency call setup when transitioning back to active state while minimizing ongoing resource usage.
3Loss of time
If wireless devices use signaling channel for session initiation, then call setup latency is reduced, but signaling channel overload may occur
Solution Approach 1:
The system extracts the session initiation messaging from the signaling channel by using pre-established traffic channels for SIP message exchange. This separates control signaling from data communication, allowing the signaling channel to focus on control functions while traffic channels handle session establishment messages, reducing signaling channel overload.
Data Source
AI summary
A first wireless device may connect to a wireless telecommunications network, and it may communicate with the wireless telecommunications network over an air interface signaling channel. The first wireless device may exchange messages with a second device, such as a wired device or a wireless device, in order to establish a session with the second device. The first wireless device may send or receive the messages over an air interface with its wireless telecommunications network using short data bursts.