By the same authors

From the same journal

Low-Latency MAC-Layer Handoff for a High Altitude Platform delivering Broadband Communications

Research output: Contribution to journalSpecial issue

Author(s)

Department/unit(s)

Publication details

JournalURSI Radio Science Bulletin
DatePublished - Mar 2010
Issue number332
Pages (from-to)39-49
Original languageUndefined/Unknown

Abstract

This paper presents a low-latency handoff algorithm that exploits the unique characteristics of a high-altitude platform (HAP) multi-cell system payload to signifi cantly reduce the need for payload stabilization. The handoff algorithm incorporates a novel time reuse Time-Division Multiplex/Time-Division Multiple Access (TDM/TDMA) frame structure, similar to that available with IEEE
802.16. Single- and multiple-frequency variants have been developed, with the intention of keeping the handoff process transparent to the user. The multiple-frequency variant is designed to increase system capacity by using a sequence
of frequencies in different parts of the frame. Performance of the single-frequency-band handoff scheme is assessed using a generic pitch model. It has been shown to perform robustly, offering low-latency handoff, even with very
short cell dwell times. Using a number of developed HAP mobility models – such as bounce, random walk, and rotation – the worst-case handoff performance is also quantified for a distribution of fi xed users within a coverage area. It is shown that local user traffi c hotspots are the dominant
factor affecting performance, but that mitigation strategies are available.

Discover related content

Find related publications, people, projects, datasets and more using interactive charts.

View graph of relations