http://www.wing-project.org/ 2010-09-03T23:08:22+02:00 http://www.wing-project.org/ http://www.wing-project.org/lib/images/favicon.ico text/html 2009-09-01T17:42:10+02:00 http://www.wing-project.org/directions:channel_assignment?rev=1251819730&do=diff Multi-Radio Multi-Channel IEEE 802.11-based Wireless Mesh Networks have recently emerged as an effective and inexpensive way to provide increased coverage to Broadband Wireless Access networks apart from extending access to existing wired networks. Utilizing multiple channels has the potential to scale up the system capacity of wireless access networks if accompanied with delicately designed channel assignment algorithms. In this work, we discuss a distributed hybrid channel assignment scheme, I… text/html 2009-09-23T11:50:34+02:00 http://www.wing-project.org/directions:device_driver_agnostic?rev=1253699434&do=diff Roofnet is an experimental multihop 802.11b-based mesh network consisting of about 50 nodes located in Cambridge, Massachusetts, installed and operated by the Massachusetts Institute of Technology (MIT). The network participants are volunteers who accept hosting in their apartments the equipment required to implement a mesh node. Each node is equipped with a single 802.11b wireless card with RTS/CTS disabled. All cards share the same 802.11b channel. Multi-hop routing is implemented using the Cl… text/html 2008-10-19T17:01:58+02:00 http://www.wing-project.org/directions:opportunistic_scheduling?rev=1224428518&do=diff The half-duplex nature of IEEE 802.11 devices requires the the sender to wait for an ACK signal after transmitting each frame. If the transmitting station does not receive the ACK it reschedules the transmission like if a collision occurred. If a node sustains repeated unsuccessful transmission it may degrade its transmission bit-rate in order to employ more robust but less efficient modulation schemes. text/html 2008-10-23T19:42:38+02:00 http://www.wing-project.org/directions:qos_provisioning?rev=1224783758&do=diff Our architecture aims at achieving service differentiation and performance isolation (at layer 2.5) in IEEE 802.11-based WMNs is proposed. It is our intention to provide strict QoS performance bounds (which is still an open issue in IEEE 802.11 WLANs), instead we want to propose a lightweight and backward compatible DiffServ architecture that aims at enhancing the perceived quality of experience by combining traffic prioritization and packet aggregation in IEEE 802.11-based WMNs. It is worth str… text/html 2010-03-05T12:07:09+02:00 http://www.wing-project.org/directions:running_roofnet?rev=1267787229&do=diff Building from sources This tutorial assumes that you have an Atheros-based wireless interface and the madiwifi drivers properly installed and configured. Roofnet sources are currently available as part of the Click modular router. Click sources are maintained in a git repository. Git is a distributed source control management system. text/html 2008-10-19T16:53:41+02:00 http://www.wing-project.org/directions:traffic_aggregation?rev=1224428021&do=diff Our architecture performs traffic aggregation on top of the MAC layer, allowing us to reduce the overhead due to both protocol headers and the contention mechanism regulating the IEEE 802.11 standard. The novelty of the proposed approach lies on the adaptive aggregation scheme that leverages the channel probing functionalities of mesh routers: such information are exploited in order to compute the optimal saturation burst length. A linear scaling is then applied in order to re-modulate the burst…