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Free, publicly-accessible full text available April 24, 2026
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Shahid, Muhammad Osama; Koch, Daniel; Raghuram, Jayaram; Krishnaswamy, Bhuvana (, 21st USENIX Symposium on Networked Systems Design and Implementation (NSDI))
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Shahid, Muhammad Osama; Koch, Daniel; Raghuram, Jayaram; Krishnaswamy, Bhuvana; Chintalapudi, Krishna; Banerjee, Suman (, 21st USENIX Symposium on Networked Systems Design and Implementation (NSDI 24))The Cloud Radio Access Network (CRAN) architecture has been proposed as a way of addressing the network throughput and scalability challenges of large-scale LoRa networks. CRANs can improve network throughput by coherently combining signals, and scale to multiple channels by implementing the receivers in the cloud. However, in remote LoRa deployments, a CRAN’s demand for high-backhaul bandwidths can be challenging to meet. Therefore, bandwidth-aware compression of LoRa samples is needed to reap the benefits of CRANs. We introduce Cloud-LoRa, the first practical CRAN for LoRa, that can detect sub-noise LoRa signals and perform bandwidth-adaptive compression. To the best of our knowledge, this is the first demonstration of CRAN for LoRa operating in real-time. We deploy Cloud-LoRa in an agricultural field over multiple days with USRP as the gateway. A cellular backhaul hotspot is then used to stream the compressed samples to a Microsoft Azure server. We demonstrate SNR gains of over 6 dB using joint multi-gateway decoding and over 2x throughput improvement using state-of-the-art receivers, enabled by CRAN in real-world deployments.more » « less
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Chen, Jiefeng; Raghuram, Jayaram; Choi, Jihye; Wu, Xi; Liang, Yingyu; Jha, Somesh (, International Conference on Machine Learning)
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The Trade-off between Universality and Label Efficiency of Representations from Contrastive LearningShi, Zhenmei; Chen, Jiefeng; Li, Kunyang; Raghuram, Jayaram; Wu, Xi; Liang, Yingyu; Jha, Somesh (, International Conference on Learning Representations)
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