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On the Stability of Slotted ALOHA Systems
IRE Transactions on Communications Systems, 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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On The Rate-Distance Adaptability of Slotted Aloha
2008 IEEE International Conference on Communications, 2008In wireless communication systems, the signal strength/quality generally varies with the distances between transmitters and receivers. As a consequence, the throughput in the MAC layer (or the transmission data rate in the PHY layer) also varies accordingly.
Chih-Cheng Tseng +3 more
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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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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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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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MiSTA: Threshold-ALOHA with Mini Slots
2021 IEEE International Black Sea Conference on Communications and Networking (BlackSeaCom), 2021We study a modification of the Threshold ALOHA policy that we refer to as Mini Slotted Threshold ALOHA (MiSTA). In MiSTA, as in Threshold ALOHA, sources with age of information (AoI) below a certain threshold Γ are inactive. In addition, each time slot is preceded by a mini slot during which active sources test the channel with a certain probability, $\
Mutlu Ahmetoglu +2 more
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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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