Direct Payload Connection for VoIP Call Setup Delay
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Solution Overview
Problem
In packet-oriented communication networks, establishing communication between IP terminals often results in delays and losses in user data quality due to the need for multiple gateways and time-consuming setup processes, particularly affecting voice communications where initial speech segments are frequently lost upon call initiation.
Innovation Solution
A method that establishes a direct first payload data connection between calling and called terminals before call acceptance, bypassing gateways and maintaining this connection to ensure immediate data transmission upon call acceptance, thereby avoiding delays and data losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a direct payload data connection is established before call acceptance, then setup delays are reduced and initial communication segments are preserved, but connection stability may be compromised due to premature connection establishment
Solution Approach 1:
The patent applies preliminary action by establishing the direct payload data connection between calling and called terminals before the call is officially accepted. This allows the connection to be ready in advance, eliminating setup delays and preserving initial communication segments. The connection is maintained in a pre-established state until call acceptance, at which point it becomes active for communication.
2Adaptability or versatility
If multiple gateways are used for routing user data, then network connectivity and adaptability are improved, but user data quality deteriorates due to conversions and delays
Solution Approach 1:
The patent extracts the payload data transmission path from the gateway routing path by establishing a direct connection between terminals. This removes intermediate gateways from the user data path, eliminating conversions and delays while preserving network connectivity through separate signaling paths that still utilize gateways for call management.
Solution Approach 2:
The patent segments the communication path into separate signaling connection and payload data connection. The signaling connection uses gateways for proper call management and network adaptability, while the payload data connection establishes a direct path between terminals to ensure high-quality user data transmission without gateway-induced delays and conversions.
3Reliability
If conventional DMC methods are used, then gateway bypass is achieved, but connection establishment time increases due to delayed payload data connection setup
Solution Approach 1:
The patent applies preliminary action by establishing the direct payload data connection as part of the call setup process before call acceptance, rather than waiting until after acceptance. This preliminary establishment eliminates the time delay associated with post-acceptance connection setup while maintaining voice quality through the direct gateway-bypassed path.
Data Source
AI summary
The invention relates to a method for establishing communication in a packet-oriented communication network (IPN) between a calling device (EG1) and a called device (EG2). In this method, prior to call acceptance by the called device (EG2), triggered by a message (MSIG, M3) within a call setup signal (SIG), a direct, first data connection (ND) is established and maintained between the calling device (EG1) and the called device (EG2). Immediately upon call acceptance by the called device (EG2), communication is initiated via the established first data connection (ND) between the calling device (EG1) and the called device (EG2). Furthermore, the invention relates to a communication system and a device for carrying out the method.