Position assisted uwb multicast audio timing and reliability limits examined
Timing and Reliability Limits of Position-Assisted UWB Multicast Audio
Information TheoryMultimedia
Summary
Sending audio to many devices at once using ultra-wideband signals can save data by not repeating the message for each listener. But making sure everyone hears the sound at the right time and without glitches is tricky. The authors studied how using the listeners’ locations helps improve timing and delivery accuracy. They found that even with position help, perfectly synchronized sound is very hard to achieve for many listeners because of delays and signal issues. Their work shows what causes failures and how often they happen under different conditions.
What this means in practice
- •For wireless network engineers: Design and test ultra-wideband multicast audio systems with position-assisted timing to improve synchronized playback and delivery reliability under realistic channel conditions.
- •For audio system integrators: Optimize deployment strategies for large-scale multicast audio by planning retransmission limits and resource schedules based on statistical bounds of timing and delivery.
Authors
Fengyun Zhang
Abstract
One-to-many ultra-wideband (UWB) transport can disseminate shared audio blocks without replicating a downlink stream for every receiver. Yet common reception does not ensure aligned electrical playback, coincident acoustic arrival, or delivery to an entire receiver group. This paper develops a unified feasibility analysis of position-assisted UWB multicast audio that separates clock and actuation error, age-dependent acoustic propagation compensation, correlated block erasures, and reserved communication resources. We derive a conditional bound on one-listener arrival spread, a stationary expression for all-receiver block delivery under common and receiver-local losses, and complementary bounds for reliability-constrained admission. Reproducible Monte Carlo experiments examine 4,590 policy--run records across clock, localization, channel, and slot configurations. For eight receivers, affine clock correction produces a mean run-level 95th-percentile electronic span of $21.19\us$, while position assistance reduces the corresponding one-listener acoustic arrival span from $21.95\ms$ to $419.43\us$. Under the stated $30\us$ timing criterion, 98.86\% of compensated events still exceed the threshold. For 64 receivers, three block copies attain an all-receiver delivery probability of approximately 0.97478 under the modeled correlated channel. The analysis exposes the distinct failure mechanisms of position age, shared fades, retransmission limits, and schedule saturation, and establishes joint criteria for interpreting synchronous multicast audio performance.