Gateway Data Signal Detector Capability Negotiation
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Solution Overview
Problem
Packet network fax services lack the ability to negotiate the capability of a data signal detector during Voice-Band Data (VBD) transmission, leading to inefficient bandwidth usage and increased costs due to the inability to distinguish between effective and mute signals.
Innovation Solution
Implementing a method and system that allows sender and receiver gateways to negotiate the capability of a data signal detector using protocols like H.248 and SIP, where a data signal detector distinguishes between effective and mute signals, enabling efficient coding and decoding processes, and adjusting the non-voice decoder usage accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If VBD manner is used to transmit data streams, then ease of implementation is improved, but bandwidth consumption increases
Solution Approach 1:
The patent extracts and separates mute signals from effective data signals using a data signal detector. By identifying and removing unnecessary mute signal transmissions, the system reduces bandwidth consumption while maintaining the simplicity of VBD implementation. The detector extracts only the essential data portions that need transmission.
Solution Approach 2:
The patent changes the transmission parameter by dynamically adjusting whether to transmit based on signal type detection. When mute signals are detected, transmission is suppressed; when effective data signals are detected, transmission proceeds. This parameter change optimizes bandwidth usage without complicating the underlying VBD mechanism.
2Quantity of substance
If data signal detector is implemented to distinguish effective and mute signals, then bandwidth efficiency is improved, but device complexity increases
Solution Approach 1:
The patent introduces a data signal detector as an intermediary component between the data stream source and the VBD transmission system. This detector acts as a mediator that identifies signal types and controls transmission accordingly, achieving bandwidth efficiency with minimal added complexity since it only needs to detect signal characteristics rather than process full data content.
3Productivity
If capability negotiation protocol is added to gateways, then transmission optimization is improved, but system complexity increases
Solution Approach 1:
The patent implements capability negotiation during the call setup phase, before actual data transmission begins. The gateways exchange capability information in advance, allowing them to optimize transmission parameters for the specific session. This preliminary action enables transmission optimization without adding complexity to the ongoing data transmission process itself.
Data Source
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AI summary
Methods and systems for negotiating the capability of a data signal detector include a sender gateway sending a first signaling containing data signal detector support capability message during voice band data transmission (301); a receiver gateway determining, according to the received first signaling, whether the sender gateway sends the data in a manner of containing a data signal detector, and determining whether to enable a non-voice decoder to decode mute packets (302). Furthermore, the receiver gateway feeds back a second signaling containing a data signal detector support capability message to the sender gateway when the receiver gateway is not able to enable the non-voice decoder (303). The sender gateway sends data in a manner of not containing a data signal detector according to the received second signaling (304). Embodiments of the present invention are applicable to a fax service in a packet-based network. Data signal detector capability negotiation may be implemented during voice band transmission. Embodiments of the present invention further disclose a sender gateway and a receiver gateway with ability for negotiating the capability of a data signal detector.