Sora: High Performance Software Radio Using General Purpose Multi-core Processors

Kun Tan, Jiansong Zhang, Ji Fang, He Liu, Yusheng Ye, Shen Wang, Yongguang Zhang, Haitao Wu, Wei Wang, and Geoffrey M. Voelker

Abstract

This paper presents Sora, a fully programmable software

radio platform on commodity PC architectures.

Sora combines the performance and fidelity of hardware

SDR platforms with the programmability and flexibility

of general-purpose processor (GPP) SDR platforms.

Sora uses both hardware and software techniques to address

the challenges of using PC architectures for highspeed

SDR. The Sora hardware components consist of

a radio front-end for reception and transmission, and

a radio control board for high-throughput, low-latency

data transfer between radio and host memories. Sora

makes extensive use of features of contemporary processor

architectures to accelerate wireless protocol processing

and satisfy protocol timing requirements, including

using dedicated CPU cores, large low-latency caches to

store lookup tables, and SIMD processor extensions for

highly efficient physical layer processing on GPPs. Using

the Sora platform, we have developed a demonstration

radio system called SoftWiFi. SoftWiFi seamlessly

interoperates with commercial 802.11a/b/g NICs, and

achieves equivalent performance as commercial NICs at

each modulation.

Details

Publication typeInproceedings
Published in6th USENIX Symposium on Networked Systems Design & Implementation (NSDI) 2009
PublisherUSENIX
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