منابع مشابه
Large Deviations for Slotted ALOHA Random Access
The effective bandwidth of a source measures the amount of burstiness besides the data generation rate. The effective bandwidths provide a means to guarantee qualityof-service in terms of packet loss probabilities. The classical theory of effective bandwidth, however, does not apply to a random access system, since the queues are coupled, i.e., the service statistics at one queue depend on the ...
متن کاملJoint collision resolution and transmit-power adjustment for Aloha-type random access
We consider uplink random access for which slotted Aloha has usually been employed with unknown channel conditions. Upon failure of a transmission attempt, a user cannot tell whether the failure was caused by collision with other simultaneously transmitting users or by his use of insufficient transmit power. If a transmission attempt failed due to collision which could have been resolved by ret...
متن کاملExploiting Combination Techniques in Random Access MAC Protocols: Enhanced Contention Resolution ALOHA
Recently, random access (RA) protocols have acquired new interest from the scientific community not only in satellite communication scenarios but also due to the opening of new fields as smart grid and machine-to-machine (M2M) applications. Unslotted ALOHA-like RA protocols are very attractive for such applications thanks to the low complexity transmitters and to their complete avoidance of syn...
متن کاملSlotted Aloha with Priorities and Random Power
We study distributed choice of retransmission probabilities in slotted Aloha under power di erentiation. We consider random transmission powers and further study the role of priorities (through power control) given either to new arriving packets or to backlogged ones. We study both the cooperative team problem in which a common objective is jointly optimized as well as the noncooperative game p...
متن کاملAnalyzing Split Channel Medium Access Control Schemas with ALOHA Reservation
In order to improve the throughput performance of Medium Access Control (MAC) schemes in wireless communication networks, some researchers proposed to split the single shared channel into two subchannels: a control subchannel and a data subchannel. The control subchannel is used for access reservation to the data subchannel over which the data packets are transmitted, and such reservation can b...
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ژورنال
عنوان ژورنال: Scholarpedia
سال: 2009
ISSN: 1941-6016
DOI: 10.4249/scholarpedia.7020