A novel distributed scheduling scheme for OFDMA uplink using channel information and probabilistic transmission

Distributed uplink scheduling in OFDMA systems is considered. In the proposed model, mobile terminals have the responsibility of making their own transmission decisions. The proposed scheme is based on two dimensional reservation in time and frequency. Terminals use channel state information in orde...

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Bibliographic Details
Published in:Computer communications 2011-11, Vol.34 (17), p.2104-2113
Main Authors: Yaacoub, Elias, Dawy, Zaher, Al-Alaoui, Mohamad Adnan
Format: Article
Language:English
Subjects:
Applied sciences
Artificial intelligence
Channel reservation
Channels
Collisions
Computer science
control theory
systems
Computer systems and distributed systems. User interface
Decisions
Distributed scheduling
Exact sciences and technology
Mobile communication systems
OFDMA
Pattern recognition. Digital image processing. Computational geometry
Probabilistic methods
Probabilistic transmission
Probability theory
Random access
Scheduling
Software
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Terminals
Transmission and modulation (techniques and equipments)
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Summary:Distributed uplink scheduling in OFDMA systems is considered. In the proposed model, mobile terminals have the responsibility of making their own transmission decisions. The proposed scheme is based on two dimensional reservation in time and frequency. Terminals use channel state information in order to favor transmissions over certain subchannels, and transmission is done in a probabilistic manner. The proposed approach provides more autonomy to mobile devices in making transmission decisions. Furthermore, it allows avoiding collisions during transmission since it leads to collision detection during the resource reservation phase. The proposed approach is compared to other random access methods and shown to be superior in terms of increasing sum-rate, reducing the number of users in outage, and reducing the collision probability in the reservation phase.
ISSN:0140-3664
1873-703X
DOI:10.1016/j.comcom.2011.06.009