کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
464829 | 697440 | 2015 | 18 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: OFDMA for wireless multihop networks: From theory to practice OFDMA for wireless multihop networks: From theory to practice](/preview/png/464829.png)
Orthogonal Frequency-Division Multiple Access (OFDMA) enables nodes to exploit spatial diversity in Wireless Mesh Networks (WMNs). As a result, throughput improves significantly. While existing work often considers the physical layer only, using OFDMA in a WMN also affects the link and network layers. In particular, multi-hop forwarding may result in severe bottlenecks since OFDMA resource allocations are typically based on local information only. In this paper, we design a practical system that mitigates such bottlenecks. To this end, we allow for resource allocation based on channel and traffic conditions at the physical layer, per-subcarrier coding at the link layer, and per-subcarrier packet segmentation at the network layer. We implement our approach on software-defined radios and show that it provides significant throughput gains compared to traditional schemes.
Journal: Pervasive and Mobile Computing - Volume 23, October 2015, Pages 104–121