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Most communication styles in tactical networks are one-to-many communications, which is multicast transmission. Recently, tactical networks has been evolving to Ad-Hoc-like distributed networks with OFDM-based Wideband Networking Waveform (WNW). In this paper, novel rate-adaptive multicast transmission method over OFDM-based wireless networks is proposed. Transmission rate for wireless multicast over...
The limitation of spectrum has become a major bottleneck of the development of next generation radio system. One of the key challenges of the emerging opportunistic cognitive radio is how to utilize unused spectrum holes efficiently without interference to incumbent system. Assuming that channel status is known, in this paper, we propose a decentralized adaptive medium access control (AMAC) protocol...
In dense radio frequency identification (RFID) system, reader collision problem is bottleneck of overall system performance. In this paper we propose a distributed multi-channel reader anti-collision MAC (ACMAC) protocol to mitigate the reader collision problem. The proposed probability based channel selection approach helps selecting channel efficiently and reduces the waiting time and beaconing...
In dense reader RFID system, a number of readers in the same interrogation area want to access the channel at the same time suffer from reader collision problem. In this paper, we propose a distributed reader anti-collision MAC protocol (RAMP) for dense reader environment. We extended the pulse protocol by adding multiple data channels and the channel hopping algorithm. The channel hopping algorithm...
Although many wireless communication standards include multicast as well as unicast traffic in layer 2, most parts of the specifications are limited to unicast methods. In addition, although the existing wireless standards provide reliable unicast methods using an automatic repeat request (ARQ) and a retransmission, multicast packets are not reliably transmitted using these standards. To retransmit...
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