Recursive Periodicity Shifting for Semi-Persistent Scheduling of Time-Sensitive Communication in 5G

TL;DR

This paper introduces a recursive periodicity shifting scheme for semi-persistent scheduling in 5G, significantly reducing delays for time-sensitive industrial traffic by aligning assignment periods with packet arrivals.

Contribution

It proposes a novel recursive periodicity shifting method that improves semi-persistent scheduling for time-sensitive communication in 5G networks.

Findings

Reduces scheduling delays for periodic traffic.

Achieves better alignment of assignment and packet timing.

Minimal modifications needed for 5G implementation.

Abstract

Various legacy and emerging industrial control applications create the requirement of periodic and time-sensitive communication (TSC) for 5G/6G networks. State-of-the-art semi-persistent scheduling (SPS) techniques fall short of meeting the requirements of this type of critical traffic due to periodicity misalignment between assignments and arriving packets that lead to significant waiting delays. To tackle this challenge, we develop a novel recursive periodicity shifting (RPS)-SPS scheme that provides an optimal scheduling policy by recursively aligning the period of assignments until the timing mismatch is minimized. RPS can be realized in 5G wireless networks with minimal modifications to the scheduling framework. Performance evaluation shows the effectiveness of the proposed scheme in terms of minimizing misalignment delay with arbitrary traffic periodicity.