English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

This paper analyzes wireless network control for remote estimation of lineartime-invariant dynamical systems under various Hybrid Automatic Repeat Request(HARQ) packet retransmission schemes. In conventional HARQ, packet reliabilityincreases gradually with additional packets; however, each retransmissionmaximally increases the Age of Information and causes severe degradation inestimation mean squared error (MSE) performance. We optimize standard HARQschemes by allowing partial retransmissions to increase the packet reliabilitygradually and limit the AoI growth. In incremental redundancy HARQ, we optimizethe retransmission time to enable the early arrival of the next status updates.In Chase combining HARQ, since packet length remains fixed, we allowretransmission and new updates in a single time slot using non-orthogonalsignaling. Non-orthogonal retransmissions increase packet reliability withoutdelaying the fresh updates. We formulate bi-objective optimization with theproposed variance of the MSE-based cost function and standard long-term averageMSE cost function to guarantee short-term performance stability. Using theMarkov decision process formulation, we find the optimal static and dynamicpolicies under the proposed HARQ schemes to improve MSE performance further.The simulation results show that the proposed HARQ-based policies are morerobust and achieve significantly better and more stable MSE performance thanstandard HARQ-based policies.

HARQ Optimization for Real-Time Remote Estimation in Wireless Networked Control