Advertisement
Published in:
2008 | OriginalPaper | Chapter
A Mobility-Adaptive TDMA MAC for Real-Time Data in Wireless Networks
Authors : Johannes Lessmann, Dirk Held
Published in: NETWORKING 2008 Ad Hoc and Sensor Networks, Wireless Networks, Next Generation Internet
Publisher: Springer Berlin Heidelberg
Activate our intelligent search to find suitable subject content or patents.
Select sections of text to find matching patents with Artificial Intelligence. powered by
Select sections of text to find additional relevant content using AI-assisted search. powered by
In this paper, we present a TDMA MAC protocol for scenarios with real-time traffic like voice streams. While many previous works assume stationary networks, DynaMAC can quickly adapt to changing topologies while not violating delay guarantees for even a single data packet with high probability. By intelligent data aggregation, DynaMAC also accounts for the fact that the large synchronization preambles of high-speed PHYs make transmissions of very small packets like voice samples extremely inefficient. Further, it introduces a novel segmentation concept, which results in a discrete set of potential per-node delay guarantees, which can be exploited by higher layers to balance the end-to-end delay of routes with different lengths. Finally, the slot allocation strategy tries to ensure a contiguous placement of unassigned slots, so that larger best-effort packets can be efficiently transmitted with a minimum of fragmentation. We validate our propositions with expressive simulations.