Variable Length Differential Encoding for Real-Time Status Updates

Bobbili, SC and Bhambay, S and Parag, P (2021) Variable Length Differential Encoding for Real-Time Status Updates. In: IEEE Communications Letters, 25 (4). pp. 1129-1133.

PDF IEE_com_let_25-4_1129-1133_2021.pdf - Published Version Restricted to Registered users only Download (439kB) | Request a copy

Abstract

Timely reception of information is of utmost importance in many cyber-physical systems. We study timely status update schemes for a single source. We consider a scheme which exploits the temporal correlation in source messages to send differential information to the receiver, over an unreliable channel. In this scheme, the source sends the true state information, interleaved with differential messages. We observe that the differential encoding improves the timeliness performance even in the absence of feedback, if the codeword lengths for both differential and true messages are chosen judiciously.

Item Type:	Journal Article
Publication:	IEEE Communications Letters
Publisher:	Institute of Electrical and Electronics Engineers Inc.
Additional Information:	The copyright for this article belongs to the Institute of Electrical and Electronics Engineers Inc.
Keywords:	Age of information; block codes; differential encoding; erasure channel; renewal theory
Department/Centre:	Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited:	26 Nov 2023 08:15
Last Modified:	26 Nov 2023 08:15
URI:	https://eprints.iisc.ac.in/id/eprint/82989

Actions (login required)

View Item