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This paper presents a new family of Interference routing metrics, ILR (interference level routing), ILRk (interference level routing to the power of k) and ILRth (interference level routing with a threshold value) for wireless ad hoc networks. Unlike conventional routing metrics, such as shortest path, these proposed routing metrics have been replaced with weight metrics that take into account the...
The growing demand for a wireless link is taking the deployment of wireless local area networks away from the notion of carefully planned and carefully managed setting, into a randomly deployed and independently managed (if at all) network setting. This results in highly contentious networks. In fact research shows that in most metropolitan cities, the size of contentious access points that are closely...
Multi-channel operation in an ad hoc network can improve robustness and reliability by efficiently managing interference and reducing contention. In this paper, we model four dynamic channel assignment techniques under the same set of assumptions, comparing the efficiency of their power and channel allocations. As the number of channels increases, the differences in the performance of the four techniques...
Exploiting the multirate capability in mobile ad hoc networks (MANETs) is more complex than in single-hop WLANs because of the rate-distance and rate-hop count tradeoffs. This paper proposes path-centric on-demand rate adaptation for MANETs (PRAM) protocol. A unique feature that sets PRAM apart from most of previous studies is its path-centric approach. While others focus on finding the best data...
IEEE 802.22 is the first wireless standard based on cognitive radio (CR) technology. It defines the air interface for a wireless regional area network (WRAN) that uses fallow segments of the TV broadcast bands. CR technology enables unlicensed users in WRANs to utilize licensed (incumbent) spectrum bands on a non-interference basis to incumbent users. The coexistence between incumbent users and unlicensed...
A multichannel MAC improves throughput in wireless mesh networks by multiplexing transmissions over orthogonal channels. In this paper, we propose an efficient way for constructing the wireless mesh structure associated with Molecular MAC, a multichannel MAC layer designed for efficient packet forwarding. Molecular MAC outperforms other classical approaches, but requires a specific structure for efficient...
This paper shows how channel assignment in multicast terrestrial communication systems with different user populations and distributed channel occupancy detection can be improved using intelligence based on reinforcement learning. The schemes greatly reduce the number of reassignments and improve the dropping probability, at the expense of increased blocking. It is found that compared to detection...
This paper considers frequency-domain receiver design for OQPSK-type schemes. Since the I-Q interference can lead to significant performance degradation we propose an FDE design (frequency-domain equalization) where there is no I-Q interference in the sampling instants for the predominant OQPSK constellation. We also propose iterative FDEs with I-Q interference cancelation, as well as the cancelation...
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