Jukka Manner

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Wide area wireless networks are being studied worldwide in order to provide better network service with good performance to customers. The Software Emulator for Analyzing Wireless Network Data Transfers (Seawind) is a real-time network simulator that allows researchers to measure the performance of real network applications over an emulated network that(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)
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)
Platforms for measuring cellular networks from mobile phones are very popular. Unfortunately, they all suffer from a simplistic approach and measurement errors, and questions how to interpret these measurements. One such error source is that it is easy to measure the signal strength but hard to draw exact conclusions from it. Our work focuses on(More)
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)
The mobile Internet that was a huge hype ten years ago is finally here. We have a wealth of mobile devices that allow us to enjoy and consume Internet content from any number of web sites and services. With faster processors and radio links, our use of the Internet and the traffic mobile users generate grows at a tremendous pace. In this development, we(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)
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)