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In recent years, wireless networks have become extremely necessary in modern communications. Especially in mobile phones, we are using wireless networks to connect to networks around the world using both cellulars and WLANs. In order to connect to the Internet, mobile phones can connect to the Internet using these wireless network technologies, but, mobile phones cannot select a suitable wireless...
We consider the problem of throughput-optimal packet dissemination, in the presence of an arbitrary mix of unicast, broadcast, multicast and anycast traffic, in a general wireless network. We propose an online dynamic policy, called Universal Max-Weight (UMW), which solves the above problem efficiently. To the best of our knowledge, UMW is the first throughput-optimal algorithm of such versatility...
Binary Exponential Backoff (BEB) algorithm is utilized to resolve the channel contention for IEEE 802.11 wireless networks. However, BEB algorithm does not meet the user expectation due to the large collision probability and the poor network fairness when the number of stations is large. To overcome the problems, a novel synchronized contention windows-based backoff algorithm is proposed, i.e., SCW...
In this paper, we study the problem of decoding delay reduction for instantly decodable network coding (IDNC) in broadcast cooperative systems, where a group of closely located clients cooperate with each other to obtain their missing packets. In such cooperative systems, one of the clients (referred to as the leader) decides the transmitting client and the packet combination for each transmission...
Most of the existing back off algorithms adjust the Contention Window (CW) only after the occurrences of collision in wireless networks. To prevent/ reduce further collisions, this paper proposes a sliding CW approach, to be done, after each successful transmission. Based on the current channel status measured by channel utilization and contention ratio, sliding factors are determined to adjust both...
Cooperative broadcast, in which a packet receiver cooperatively combines received weak signal power from different senders to decode the original packet, has gained increasing attention. However, existing approaches are developed based on the assumption that there is a single flow in the network; thus, they are not suitable for multi-flow broadcasting in which broadcasts are initiated by different...
With the emergence of high bandwidth-delay product and heterogeneous wired / wireless networks, the standard TCP appears to be too conservative to offer reasonable performance. The use of parallel TCP connections has been suggested in such environments. We have demonstrated that, with the same level of aggressiveness, this approach can outperform the single-connection based approach. However, this...
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