SID Frame Bundling for VoLTE and VoNR Uplink Optimization
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in managing listen or silent periods during Voice Over Long-Term Evolution (VoLTE) and Voice Over New Radio (VoNR) calls, particularly in optimizing uplink operations, which affect spectral efficiency and latency.
Innovation Solution
The method involves detecting transitions from talk to silence states during voice calls and transmitting bundles of Silence Indicator (SID) frames, including comfort noise data, to prevent scheduling requests and maintain radio resource grants, thereby optimizing the transmission periodicity of SID frames.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If SID frames are transmitted individually during silence periods, then the voice call quality is maintained through comfort noise, but the uplink signaling overhead increases and spectral efficiency decreases
Solution Approach 1:
Multiple SID frames are bundled together into a single transmission packet. The source access terminal groups several SID frames that would otherwise be transmitted separately, combining them into one bundled transmission to the base station. This reduces the number of individual uplink transmissions during silence periods while maintaining the comfort noise information needed for voice call quality.
2Reliability
If SID frames are transmitted frequently to maintain comfort noise, then voice call quality is preserved, but latency increases due to repeated scheduling requests
Solution Approach 1:
Multiple SID frames are bundled together into a single transmission packet. The source access terminal groups several SID frames that would otherwise be transmitted separately, combining them into one bundled transmission to the base station. This reduces the number of individual uplink transmissions during silence periods while maintaining the comfort noise information needed for voice call quality.
3Reliability
If individual SID frames are transmitted during silence periods, then comfort noise is updated regularly, but the number of scheduling requests increases signaling overhead
Solution Approach 1:
Multiple SID frames are bundled together into a single transmission packet. The source access terminal groups several SID frames that would otherwise be transmitted separately, combining them into one bundled transmission to the base station. This reduces the number of individual uplink transmissions during silence periods while maintaining the comfort noise information needed for voice call quality.
Solution Approach 2:
The source access terminal proactively transmits a bundle of SID frames in advance during the silence period. By preparing and sending multiple SID frames together before the silence period ends, the terminal ensures that comfort noise information is updated regularly without needing to send frequent individual requests, thereby reducing signaling overhead.
Data Source
AI summary
Disclosed are techniques for transmitting bundles of silence indicator (SID) frames during a voice call among a plurality of access terminals. In an aspect, a source access terminal detects a transition to a silence state, generates, in response to detection of the transition, at least a first bundle of SID frames, wherein each SID frame of the at least the first bundle of SID frames includes data representing comfort noise to be played at one or more target access terminals of the plurality of access terminals during the silence state, and transmits the at least the first bundle of SID frames to a base station serving the source access terminal. In an aspect, the base station receives the at least the first bundle of SID frames, and periodically forwards SID frames of the at least the first bundle of SID frames to the one or more target access terminals.