Fast DRX for Speech Transmission in Wireless Networks
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In GSM speech dedicated mode, downlink power consumption in wireless cellular communication networks is not effectively minimized due to continuous reception of non-speech data, leading to reduced talk time and increased power usage.
Innovation Solution
Implementing fast Downlink Discontinuous Reception (DRX) by early detection of non-speech transmission through demodulation of the first burst of a speech frame, generating metrics, and enabling or disabling subsequent burst reception based on determined status, allowing the modem to enter IDLE mode and save power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous reception is used to ensure no speech data is missed, then reliability of speech reception is improved, but power consumption increases
Solution Approach 1:
The system performs preliminary detection on the first burst of a speech frame to determine whether speech data is present before committing to full reception of all four bursts. This preliminary action on the first burst allows the system to make an early decision about whether to continue reception, thereby avoiding unnecessary power consumption while maintaining reliability when speech data is actually present.
Solution Approach 2:
The speech frame reception process is segmented into two phases: a detection phase using only the first burst, and a full reception phase using all four bursts if speech data is detected. This segmentation allows the system to minimize power consumption by limiting full reception to only those frames that actually contain speech data, rather than continuously receiving all bursts regardless of content.
2Measurement precision
If continuous reception of all bursts is performed, then speech data detection accuracy is improved, but talk time is reduced
Solution Approach 1:
The system performs a preliminary check on the first burst to detect speech data before initiating full reception of all four bursts. This preliminary detection ensures that speech data is not missed while avoiding unnecessary reception of bursts when no speech data is present, thereby extending talk time without sacrificing detection accuracy.
Solution Approach 2:
The system uses periodic detection on the first burst of each speech frame to determine whether full reception should be activated. This periodic check allows the system to maintain high detection accuracy when speech is present while minimizing power consumption and extending talk time during non-speech periods by skipping full reception.
3Reliability
If all four bursts of speech frame are received, then completeness of speech data is improved, but power consumption increases
Solution Approach 1:
The system performs a preliminary detection on the first burst to determine whether the speech frame contains actual speech data before proceeding to receive all four bursts. This preliminary action ensures that complete speech data is received when present while avoiding unnecessary power consumption from receiving complete frames that contain only non-speech data.
Solution Approach 2:
The reception process is segmented into a conditional full reception mode (when speech data is detected in the first burst) and a skip mode (when no speech data is detected). This segmentation ensures speech data completeness is maintained when needed while significantly reducing power consumption during non-speech periods by receiving only the first burst for detection purposes.
Data Source
AI summary
A user equipment (UE) operating in a wireless network receives a sequence of speech frames on a speech channel. The UE demodulates at least a portion of a speech frame of the sequence of received speech frames to produce a metric value. The UE discontinues processing of the speech frame and enters a low power discontinuous reception (DRX) mode if the metric value indicates absence of valid speech data, and ignores and does not demodulate at least the next remaining bursts of the speech frame after entering DRX mode.