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A Novel Distributed Scheduling Scheme for OFDMA Uplink using Channel Information

Summary: 1
A Novel Distributed Scheduling Scheme for
OFDMA Uplink using Channel Information
and Probabilistic Transmission
Elias Yaacoub1, Zaher Dawy2, and Mohamad Adnan Al-Alaoui2
1QU Wireless Innovations Center, P.O. Box 5825, Qatar Science and Technology Park, Doha, Qatar. E-mail:
2Department of Electrical and Computer Engineering, American University of Beirut, P.O. Box 11-0236 / ECE Department,
Riad El-Solh / Beirut 1107 2020, Lebanon. E-mail:{zaher.dawy, adnan}@aub.edu.lb.
June 15, 2011 DRAFT
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


Source: Al-Alaoui, Mohamad Adnan - Faculty of Engineering and Architecture, American University of Beirut, Lebanon


Collections: Engineering