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

被引:2
作者
Yaacoub, Elias [1 ]
Dawy, Zaher [2 ]
Al-Alaoui, Mohamad Adnan [2 ]
机构
[1] QU Wireless Innovat Ctr, Doha, Qatar
[2] Amer Univ Beirut, Dept Elect & Comp Engn, ECE Dept, Beirut 11072020, Lebanon
关键词
Distributed scheduling; OFDMA; Channel reservation; Random access; Probabilistic transmission; CROSS-LAYER OPTIMIZATION; WIRELESS NETWORKS; ACCESS SCHEME; DIVERSITY; CAPACITY;
D O I
10.1016/j.comcom.2011.06.009
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
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. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码:2104 / 2113
页数:10
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