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The Throughput of Slotted Aloha with Diversity

Munari, Andrea and Heindlmaier, Michael and Liva, Gianluigi and Berioli, Matteo (2013) The Throughput of Slotted Aloha with Diversity. In: 51st Allerton Annual Conference on Communication, Control and Computing. 51st Allerton Annual Conference on Communications, Control and Computing, 2-4 Oct 2013, Monticello (IL), US.



In this paper, a simple variation of classical Slotted Aloha is introduced and analyzed. The enhancement relies on adding multiple receivers that gather different observations of the packets transmitted by a user population in one slot. For each observation, the packets transmitted in one slot are assumed to be subject to independent on-off fading, so that each of them is either completely faded, and then does not bring any power or interference at the receiver, or it arrives unfaded, and then may or may not, collide with other unfaded transmissions. With this model, a novel type of diversity is introduced to the conventional SA scheme, leading to relevant throughput gains already for moderate number of receivers. The analytical framework that we introduce allows to derive closed-form expression of both throughput and packet loss rate an arbitrary number of receivers, providing interesting hints on the key trade-offs that characterize the system. We then focus on the problem of having receivers forward the full set of collected packets to a final gateway using the minimum possible amount of resources, i.e., avoiding delivery of duplicate packets, without allowing any exchange of information among them. We derive what is the minimum amount of resources needed and propose a scheme based on random linear network coding that achieves asymptotically this bound without the need for the receivers to coordinate among them.

Item URL in elib:https://elib.dlr.de/85551/
Document Type:Conference or Workshop Item (Speech)
Title:The Throughput of Slotted Aloha with Diversity
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Date:October 2013
Journal or Publication Title:51st Allerton Annual Conference on Communication, Control and Computing
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Keywords:Random access, Aloha
Event Title:51st Allerton Annual Conference on Communications, Control and Computing
Event Location:Monticello (IL), US
Event Type:international Conference
Event Dates:2-4 Oct 2013
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Communication and Navigation
DLR - Research area:Raumfahrt
DLR - Program:R KN - Kommunikation und Navigation
DLR - Research theme (Project):R - Vorhaben Multimedia Satellitennetze
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Communication and Navigation > Satellite Networks
Deposited By: Munari, Andrea
Deposited On:28 Nov 2013 08:24
Last Modified:31 Jul 2019 19:43

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