Journal ArticleDOI
Signal processing in random access
TLDR
In this paper, a cross-layer view for roles of signal processing in random access network and vice versa is presented, and two cases where cross layer design has a quantifiable impact on system performance are discussed.Abstract:
In this paper, a cross-layer view for roles of signal processing in random access network and vice versa is presented. The two cases where cross-layer design has a quantifiable impact on system performance are discussed. The first case is a small network (such as wireless LAN) where a few nodes with bursty arrivals communicate with an access point. The design objective is to achieve the highest throughput among users with variable rate and delay constraints. The impact of PHY layer design on MAC protocol is examined and illustrates a tradeoff between allocating resources to the PHY layer and to MAC layer. The second case, in contrast, deals with large-scale sensor networks where each node carries little information but is severely constrained by its computation and communication complexity and most importantly, battery power. This paper emphasizes that the design of signal processing algorithms must take into account the role of MAC and the nature of random arrivals and bursty transmissions.read more
Citations
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Journal ArticleDOI
Cross-layer design: a survey and the road ahead
V. Srivastava,Mehul Motani +1 more
TL;DR: A definition for cross-layer design is suggested, the basic types of cross- layer design with examples drawn from the literature are discussed, and the initial proposals on howcross-layer interactions may be implemented are categorized.
Journal ArticleDOI
Distributed source coding for sensor networks
TL;DR: In this article, the authors presented an intensive discussion on two distributed source coding (DSC) techniques, namely Slepian-Wolf coding and Wyner-Ziv coding, and showed that separate encoding is as efficient as joint coding for lossless compression in channel coding.
Journal ArticleDOI
Interference analysis for highly directional 60-GHz mesh networks: the case for rethinking medium access control
TL;DR: It is argued that MAC design for 60-GHz mesh networks can essentially ignore interference and must focus instead on the challenge of scheduling half-duplex transmissions with deaf neighbors, and an analytical framework for estimating the collision probability in such networks as a function of the antenna patterns and the density of simultaneously transmitting nodes is provided.
Journal ArticleDOI
Exploiting decentralized channel state information for random access
Srihari Adireddy,Lang Tong +1 more
TL;DR: It is shown that through the use of channel state, with arbitrarily small power, it is possible to achieve an AST that is lower-bounded by the spreading gain of the network, which has implications for the reachback problem in large sensor networks.
Journal ArticleDOI
Multichannel random access in OFDMA wireless networks
TL;DR: This work develops a fast retrial scheme that is based on slotted Aloha and exploits the structure of OFDMA, and finds that full sharing, i.e., a reuse factor of one, performs best for given random access channels.
References
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Proceedings ArticleDOI
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Raymond Knopp,Pierre A. Humblet +1 more
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