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On the Thrashing Cusp in Slotted Aloha Systems
IEEE Transactions on Communications, 1985We develop a new tool for performance evaluation of a multiaccess communication system. We give an explicit detailed analytic description of a cusp catastrophe in a computer communication system. An approximate model is formulated for a slotted Aloha system assuming a single buffer, based on the Markovian model studied by \textit{S. S.
Yoshikuni Onozato, Shoichi Noguchi
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On the Capacity of Slotted Aloha With Ancillary Channels
IEEE Communications Letters, 2015In this letter, we focus on a legacy system operated with slotted-Aloha and complemented by a redundancy channel where nodes transmit replicas of their packets. The number of replicas follows a probability distribution, and successive interference cancelation is applied across channels.
Munari, Andrea +2 more
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An Analysis of Generalized Slotted-Aloha Protocols
IEEE/ACM Transactions on Networking, 2009Aloha and its slotted variation are commonly deployed medium access control (MAC) protocols in environments where multiple transmitting devices compete for a medium, yet may have difficulty sensing each other's presence (the "hidden terminal problem'').
Richard T. B. Ma +2 more
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On the Stability of Slotted ALOHA Systems
IEEE Transactions on Communications, 1980In this correspondence we prove the following properties of the stability of the finite population model of slotted ALOHA systems. 1) The input-output packet flow balance principle [1] and the concept of expected drift [2] used for the stability analysis of the slotted ALOHA system are mathemtaically equivalent.
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An Optimized SDE Model for Slotted Aloha
IEEE Transactions on Communications, 2011We consider a stochastic differential equation (SDE) model of slotted Aloha with the retransmission probability as the associated parameter. We formulate the problem in both (a) the finite horizon and (b) the infinite horizon average cost settings. We apply the algorithm of for the first setting, while for the second, we adapt a related algorithm from ...
Karmeshu +2 more
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A new approximation for slotted buffered Aloha
2008 42nd Annual Conference on Information Sciences and Systems, 2008Few models in wireless communications have been addressed as thoroughly as slotted Aloha, and most important questions regarding its performance have been answered (e.g., stability). Although slotted time finite user Aloha with infinite backlog (no queueing analysis) and fixed (common) contention probability is trivial, incorporating queueing ...
Steven Weber 0001 +2 more
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Capacity of time-slotted ALOHA systems
WCNC. 1999 IEEE Wireless Communications and Networking Conference (Cat. No.99TH8466), 2003We consider the capacity of time-slotted ALOHA systems, where multiple users synchronously send packets, which may collide at the receiver. Specific coding for ALOHA systems had previously been proposed to avoid complete loss of packets involved in collisions, but the capacity of ALOHA systems had not been previously determined. We consider capacity in
Muriel Médard, Andrea J. Goldsmith
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Slotted ALOHA with MIMO Spatial Multiplexing
2008 4th International Conference on Wireless Communications, Networking and Mobile Computing, 2008Many contention protocols in wireless networks such as carrier sense multiple access with collision avoidance (CSMA/CA) incorporate methods that minimize probability of collision. However there is another possible way that collisions can be avoided, that is by getting some help from physical layer technologies.
Hunchangsith, K. +2 more
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Distributed Decoding for Coded Slotted ALOHA
IEEE Communications Letters, 2017In this letter, we propose a distributed decoding algorithm for the coded slotted ALOHA multiple access scheme. To recover the transmitted packets, the proposed algorithm applies a swap and a back substitution operation on each received packet. As a result, the hidden information in the collided packets can be drawn out immediately to help the decoding,
Dai Jia +4 more
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2011 3rd International Conference on Electronics Computer Technology, 2011
Enhanced Slotted aloha new method for medium access which reduces the probability of collision to 0.90. It deals with communication between various stations using a single channel and avoiding a collision which is considered to be a difficult task for a single channel. It gives a better collision resistance then the previously used methods.
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Enhanced Slotted aloha new method for medium access which reduces the probability of collision to 0.90. It deals with communication between various stations using a single channel and avoiding a collision which is considered to be a difficult task for a single channel. It gives a better collision resistance then the previously used methods.
openaire +1 more source