IIT Home Page CNR Home Page

Low Latency Data Broadcast in Multi-Rate Wireless Meshes

In a multi-rate wireless network, a node can dynamically adjust its link transmission rate by switching between different modulation schemes. For the current IEEE802.11a/b/g standards, this rate adjustment is limited to unicast traffic only. We consider a novel type of multi-rate mesh networks where a node can dynamically adjust its link layer multicast rates to its neighbors. In particular, we consider the problem of realizing low latency network-wide broadcast in this type of multi-rate wireless meshes. We will first show that the multi-rate broadcast problem is significantly different from the single-rate case. We will then present two algorithms for achieving low latency broadcast in a multi-rate mesh which exploits both wireless broadcast advantage and the multi-rate nature of the network. The proposed algorithms allow us to study how the design of multi-rate meshes can affect the broadcast latency. In particular, we show the significance of the product of transmission rate and transmission coverage area in designing multi-rate wireless mesh networks. This is joint work with Prof. Chun Tung Chou and Junaid Qadir, UNSW.

Dal 10/03/2006-00.00 al 10/03/2006-00.00 , Pisa

Note: Relatore: Archan Misra