LIMOS: A Tiny Real-Time Micro-Kernel for Wireless Objects

• Published in: 2006 International Conference on Wireless Communications, Networking and Mobile Computing pp. 1 - 4
• Main Authors: Hai-Ying Zhou, Kun-Mean Hou, Chanet, J.-P., de Vaulx, C., De Sousa, G.
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01.09.2006
• Subjects: Application software; Data structures; Gas insulated transmission lines; Graphical user interfaces; Hardware; Kernel; Operating systems; Real time systems; Wireless sensor networks; Yarn
• DOI: 10.1109/WiCOM.2006.410
• ISBN: 1424405173; 9781424405176
• ISSN: 2161-9646

TinyOS is a natural event-driven single-task system. It fits for the single-task specific-application but not for the real-time multi-task application; while, SDREAM is a typical distributed real-time micro-kernel. It supports real-time multi-task applications but normally consumes more resources. This paper presents a novel hybrid real-time micro-kernel: LIMOS (lightweight multi-threading operating system), which combines the features of TinyOS and SDREAM. LIMOS adopts the event & thread two-level architecture and correspondingly has a two-level scheduling policy: 'event-driven' (high level scheduling for events) and 'priority-based preemptive' (low level scheduling for threads). LIMOS adopts the LINDA concept: tuple space and in & out primitive-pair for system synchronization & communication. At present, LIMOS has been applied into a wireless application with the integration of multi-wireless techniques (RFID, ZigBee, and WiFi)