Héctor L. Velayos Munoz

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Performance measurements of IEEE 802.11 access points provide important information for networking research and network management. In this paper, we present an active measurement method to determine the maximum saturation throughput of wireless LAN access points. The saturation throughput is achieved when there always is a frame ready to transmit, and it(More)
With the fast adoption of IP-based communications for mobile computing, users are expecting a similar service in wireless and wired networks. This raises the need for setting guarantees to the quality of the offered service (QoS), despite the technology of the access network (AN) or the mobility of the terminal. As mobile computing is getting more popular(More)
This paper presents a distributed admission control for the distributed coordination function of IEEE 802.11 wireless LANs that limits the risk of congestion collapse due to a high arrival rate of flows. This control scheme requires no modification to the current distributed coordination function; it works by performing a short, non-disturbing probe that(More)
We present extensions to the IEEE 802.11 WLAN architecture to facilitate the deployment and operation of large-scale networks. A new distribution system (DS) is designed to work across IP networks removing the need for an Ethernet backbone. APs connected to different IP networks can join the DS to form a single WLAN, with link-layer mobility support for(More)
The fast adoption of IP-based communications for hand-held devices equipped with wireless interfaces is creating new challenges for the Internet evolution. Users expect flexible access to Internet based services, including not only traditional data services but also multimedia applications. This generates a new challenge for QoS provision, as it will have(More)
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