Signal Quality Feedback via Packet Stream Encoding
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Solution Overview
Problem
There is uncertainty in wireless telecommunications regarding whether a signal has been satisfactorily received due to noise and impairment in the transmission path, especially in two-way radio and cellular communications, where users lack reliable feedback on call quality.
Innovation Solution
A telecommunications terminal measures signal quality at the receiving end and encodes this data into the packet stream, allowing the transmitting terminal to provide users with a quality indication, potentially using speech-to-text conversion for SMS messages, ensuring reliable communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If signal strength indication is used to assess communication quality, then users can see coverage area quality, but the indication is unreliable and does not reflect actual reception quality at the far-end terminal
Solution Approach 1:
The patent implements a feedback mechanism where the second terminal (far-end terminal) measures the quality of received signals and sends this measurement data back to the first terminal (transmitting terminal). This feedback loop allows the transmitting terminal to provide accurate quality indications to users based on actual reception conditions at the far-end, rather than relying on local signal strength measurements that do not reflect actual communication quality.
Solution Approach 2:
Instead of the transmitting terminal measuring and reporting its own transmitted signal quality, the patent inverts the approach by having the receiving terminal measure the quality of received signals and report back. This inversion ensures that the quality indication reflects actual reception conditions rather than transmission conditions, resolving the unreliability of traditional signal strength indications.
2Reliability
If additional protocols like RTCP are used to provide quality feedback, then communication robustness improves, but additional transmission infrastructure and standardization requirements are needed
Solution Approach 1:
The patent makes the existing packet stream between terminals serve multiple functions: it carries both the media waveform data and the signal quality measurement data. By encoding measurement data into the same packet stream used for voice communication, the system avoids requiring separate dedicated infrastructure or protocols, thus improving reliability without increasing device or infrastructure complexity.
Solution Approach 2:
The patent combines the signal quality measurement data with the media waveform data in a single packet stream. Instead of using separate channels or protocols for quality feedback, the measurement data is merged into the existing communication flow, eliminating the need for additional transmission infrastructure while maintaining communication robustness.
3Reliability
If signal quality measurements are encoded into the packet stream, then accurate quality feedback is provided, but processing and decoding overhead increases
Solution Approach 1:
The existing packet stream processing infrastructure is made multi-functional by having it handle both media waveform decoding and quality measurement data extraction. The same receiver interface that processes media data also extracts measurement data, and the processor that decodes media waveforms also decodes quality indications, eliminating the need for separate dedicated processing paths.
Solution Approach 2:
The packet stream structure is designed to be self-sufficient, containing both media data and quality measurement data within the same stream. The receiving terminal's processor can simultaneously or sequentially extract both types of information using the same decoding mechanisms, allowing the system to serve multiple purposes without requiring additional specialized processing components.
Data Source
AI summary
A technique is discloses that enables a first telecommunications terminal, wireless or otherwise, to report to its user whether a second, wireless telecommunications terminal is receiving the first terminal's packet stream transmissions at a satisfactory quality level. The second terminal receives the packet stream that conveys the media waveform transmitted by the first terminal. The media waveform can be that of the speech signal of the first terminal's user. The second terminal measures a trait of the received signal and encodes the measurement data into the packet stream that the second terminal is already transmitting to the first terminal. The first terminal then decodes the measurement data from the received second stream and presents, to its user, a quality indication that is based on the measurement data. In doing so, the first terminal provides its user with a better idea of whether the second terminal has reliably received the user's communication.