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Advances in wireless communication technologies and increasing demand for wide variety of applications lead to the fact that Vehicular Ad Hoc Networks (VANETs) become an attractive research area in academic and industry. In order to reach an actual Intelligent Transportation System (ITS), a well-designed Medium Access Control (MAC) layer protocol is a challenging issue. Unfortunately, the statistical review has been done by this paper on the data that is extracted from the IEEE Xplore database proves that the area of MAC support for VANETs has received less attention than other areas. Also, most of these relatively few research have focused on V2I communications. As a result, many significant research challenges still remain unexplored in MAC support for V2V communications in VANETs.

The most important challenges of a MAC layer for VANET can be summarized as follows [1]: the dynamic nature of VANETs including the changing causes by vehicles or in channel characteristics, scalability in various traffic densities, and supporting different applications with different requirements.

MAC protocols based on how the nodes access to the channel are controlled, can be categorized into contention-free and contention-based approaches. Contention-based approaches assume no or little coordination so that this assumption makes them more suitable for VANETs. However, unbounded delay and their low performance in high dense networks is problematic for safety messages as well as some infotainment applications with minimum requirements. Contention-free approaches can satisfy better (guarantee) Qos requirements for timely-critical applications but they suffer from high coordination especially in high variable conditions such as VANETs.

1. Kenney, J.: �Standards and regulations�, in Hartenstein, H., Laberteaux, K.P. (Eds.): �VANET: vehicular applications and inter-networking technologies� (Wiley, 2010), Ch. 10, pp. 365� 428

Subsistence is a sandbox, first person, open-world survival game (currently only singleplayer, with multiplayer in development). Struggle to build a base and gear-up in the hostile environment. Defend yourself from wildlife and AI hunters (who also build bases in the world).
1. Extract Release
2. Launch The Game
3. Play!

MEGA
MIRROR MULTIUP

TORRENT
Subsistence v30.03.2017.torrent

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