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Wireless mesh networks are being deployed to provide broadband wireless connectivity to city-wide hotspots. The typical architecture in these deployments thus far is a single-radio architecture: mesh nodes carry only one radio, which is used both to receive the traffic from the clients and to relay this traffic through the mesh to the wired Internet(More)
Mobile devices people carry in their pockets every day can use various means to connect to data services all around the Internet, e.g., 2G, 3G and WLAN. This has been an important development towards an easily accessible and always-on the Internet. While radio connectivity, bits rates in particular, has developed tremendously during the recent years,(More)
Ad-hoc networks constitute a peculiar computing environment , characterized by the lack of centralized support from pre-existing network entities. Applications and protocols designed for centralized environments must be adapted for use in ad-hoc environments. For example, the baseline Session Initiation Protocol (SIP) strongly relies on the presence of an(More)
GTP tunnels are used to transport user data packets in LTE networks over the mobile backhaul between the base stations and core network elements. Maintaining the tunnel as the user equipment moves requires heavy signaling. Moreover, the protocol stack effectively adds headers and thus introduces overhead. In this paper, we design and analyze an LTE(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 or the mobility of the terminal. As mobile computing is getting more popular on a(More)
There exists a number of network measurement tools and web-based services for end users. Almost all of them focus on network bandwidth and possibly latency, and simply report the results to the user. This paper presents Netradar, a somewhat different measurement service. We analyze network bandwidth and latency but also over ten other parameters. We dwell(More)
Various forms of ad-hoc networking are slowly emerging. However, a wider diffusion of ad-hoc networking in everyday life will only be possible if existing common applications are adapted for use in ad-hoc networks. There has been some work on adapting Internet-based applications to function in ad-hoc networks. Yet, in order to make ad-hoc networking even(More)