Packet Telephony Terminal with TSN Stream Reservation
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Solution Overview
Problem
Current packet telephony and time-sensitive network (TSN) technologies operate separately, lacking integration to enhance quality of service (QoS) in packet telephony applications, particularly in environments requiring low latency and high precision communication.
Innovation Solution
A packet telephony terminal apparatus and method that combine TSN technology with packet telephony services by performing TSN stream reservation, adjusting dejitter buffer sizes, and setting time synchronization, using IEEE802.1.Qcc and IEEE1588 specifications, to create an integrated network structure for low latency packet telephony communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If TSN stream reservation procedure is performed successfully, then latency is reduced and QoS is improved, but device complexity increases due to integration of TSN and packet telephony protocols
Solution Approach 1:
The patent merges TSN stream reservation procedure with packet telephony call processing into a unified control flow. The TSN matching device integrates both protocol stacks, allowing simultaneous execution of TSN stream reservation and packet telephony call setup. This combining approach reduces latency by establishing TSN resource reservations before packet telephony data transmission begins, while managing device complexity through integrated protocol handling in a single control unit.
Solution Approach 2:
The patent performs TSN stream reservation procedure as a preliminary action before actual packet telephony data transmission. By reserving TSN streams and configuring network resources in advance during call setup, the system ensures low-latency transmission paths are pre-established. This preliminary resource allocation eliminates the need for dynamic resource negotiation during data transmission, thereby reducing latency while managing complexity through automated pre-configuration.
2Loss of time
If dejitter buffer size is adjusted to minimize latency, then loss of time is reduced, but reliability deteriorates due to reduced buffering capacity
Solution Approach 1:
The patent dynamically adjusts the dejitter buffer size parameter based on TSN stream reservation outcomes and network conditions. When TSN streams are successfully reserved with guaranteed quality of service, the dejitter buffer size is reduced to minimize latency. The system monitors transmission quality and reliability metrics, adjusting the buffer size parameter in real-time to maintain optimal balance between latency reduction and reliability preservation, adapting to changing network conditions.
Solution Approach 2:
The patent implements dynamic dejitter buffer size adjustment rather than using a fixed buffer configuration. The buffer size changes adaptively based on TSN stream reservation success, network traffic patterns, and observed transmission reliability. This dynamic approach allows the system to minimize latency when network conditions permit while automatically increasing buffering capacity when reliability concerns arise, creating a flexible balance between the two competing objectives.
3Device complexity
If TSN and packet telephony are operated separately, then device complexity is reduced, but quality of service deteriorates due to lack of integration
Solution Approach 1:
The patent implements a TSN matching device with multi-functionality that handles both TSN stream reservation procedures and packet telephony call processing within a single integrated unit. This universal device performs multiple functions including TSN protocol management, packet telephony control, dejitter buffer management, and time synchronization. By consolidating these functions into one multi-functional apparatus, the system achieves high QoS through integrated operation while avoiding the complexity of multiple separate devices working in coordination.
Solution Approach 2:
The TSN matching device acts as an intermediary that bridges TSN network infrastructure and packet telephony applications. It mediates between TSN stream reservation mechanisms and packet telephony data transmission, ensuring seamless interaction between the two previously separate technologies. This intermediary function enables coordinated operation, allowing TSN resource reservations to directly benefit packet telephony QoS while maintaining protocol compatibility and simplifying the overall system architecture.
Data Source
AI summary
A method in which a high-quality packet telephony terminal apparatus performing low-latency and lossless packet communication with a counterpart packet telephony terminal apparatus operates in an integrated network structure in which a time sensitive network (TSN) and a packet communication network are combined may be disclosed. The packet telephony terminal apparatus may perform packet telephony call processing, perform a TSN stream reservation procedure when the counterpart packet telephony terminal apparatus is capable of performing a TSN function for lossless packet communication, adjust a size of a dejitter buffer when the TSN stream reservation procedure is successful, and perform low-latency packet telephony communication through the minimized size of the dejitter buffer.