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1. Challenge: COSMOS: A city-scale programmable testbed for experimentation with advanced wireless

   Raychaudhuri, D; Seskar, I.; Zussman, G.; Korakis, T.; Kilper, D.; Chen, T.; Kolodziejski, J.; Sherman, M.; Kostic, Z.; Gu, X.; et al (January 2020, ACM MobiCom '20)

   This paper focuses on COSMOS ś Cloud enhanced Open Software defined MObile wireless testbed for city-Scale deployment. The COSMOS testbed is being deployed in West Harlem (New York City) as part of the NSF Platforms for Advanced Wireless Research (PAWR) program. It will enable researchers to explore the technology łsweet spotž of ultra-high bandwidth and ultra-low latency in the most demanding real-world environment. We describe the testbed’s architecture, the design and deployment challenges, and the experience gained during the design and pilot deployment. Specifically, we describe COSMOS’ computing and network architectures, the critical building blocks, and its programmability at different layers. The building blocks include software-defined radios, 28 GHz millimeter-wave phased array modules, optical transport network, core and edge cloud, and control and management software. We describe COSMOS’ deployment phases in a dense urban environment, the research areas that could be studied in the testbed, and specific example experiments. Finally, we discuss our experience with using COSMOS as an educational tool. 

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2. A Professional Development Model to Integrate Computational Thinking Into Middle School Science Through Codesigned Storylines

   Biddy, Q.; Gendreau Chakarov, A.; Bush, J.; Hennessy Elliott, C.; Jacobs, J.; Recker, M.; Sumner, T.; Penuel, W. (March 2021, Contemporary issues in technology and teacher education)

   This article describes a professional development (PD) model, the CT-Integration Cycle, that supports teachers in learning to integrate computational thinking (CT) and computer science principles into their middle school science and STEM instruction. The PD model outlined here includes collaborative design (codesign; Voogt et al., 2015) of curricular units aligned with the Next Generation Science Standards (NGSS) that use programmable sensors. Specifically, teachers can develop or modify curricular materials to ensure a focus on coherent, student-driven instruction through the investigation of scientific phenomena that are relevant to students and integrate CT and sensor technology. Teachers can implement these storylines and collaboratively reflect on their instructional practices and student learning. Throughout this process, teachers may develop expertise in CT-integrated science instruction as they plan and use instructional practices aligned with the NGSS and foreground CT. This paper describes an examination of a group of five middle school teachers’ experiences during one iteration of the CT-Integration Cycle, including their learning, planning, implementation, and reflection on a unit they codesigned. Throughout their participation in the PD, the teachers expanded their capacity to engage deeply with CT practices and thoughtfully facilitated a CT-integrated unit with their students. 

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3. A Professional Development Model to Integrate Computational Thinking Into Middle School Science Through Codesigned Storylines

   Biddy, Q.; Gendreau Chakarov, A.; Bush, J.; Hennessy Elliott, C.; Jacobs, J.; Recker, M.; Sumner, T.; Penuel, W. (January 2021, Contemporary issues in technology and teacher education)

   null (Ed.)

   This article describes a professional development (PD) model, the CT- Integration Cycle, that supports teachers in learning to integrate computational thinking (CT) and computer science principles into their middle school science and STEM instruction. The PD model outlined here includes collaborative design (codesign; Voogt et al., 2015) of curricular units aligned with the Next Generation Science Standards (NGSS) that use programmable sensors. Specifically, teachers can develop or modify curricular materials to ensure a focus on coherent, student-driven instruction through the investigation of scientific phenomena that are relevant to students and integrate CT and sensor technology. Teachers can implement these storylines and collaboratively reflect on their instructional practices and student learning. Throughout this process, teachers may develop expertise in CT-integrated science instruction as they plan and use instructional practices aligned with the NGSS and foreground CT. This paper describes an examination of a group of five middle school teachers’ experiences during one iteration of the CT- Integration Cycle, including their learning, planning, implementation, and reflection on a unit they codesigned. Throughout their participation in the PD, the teachers expanded their capacity to engage deeply with CT practices and thoughtfully facilitated a CT-integrated unit with their students. 

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4. Programmable Optical x-Haul Network in the COSMOS Testbed

   https://doi.org/10.1109/ICNP.2019.8888108  

   Gutterman, Craig; Zussman, Gil; Minakhmetov, Artur; Yu, Jiakai; Sherman, Michael; Chen, Tingjun; Zhu, Shengxiang; Seskar, Ivan; Raychaudhuri, Dipankar; Kilper, Daniel (October 2019, 2019 IEEE 27th International Conference on Network Protocols (ICNP))

   The Cloud-Enhanced Open Software Defined Mobile Wireless Testbed for City-Scale Deployment (COSMOS) platform is a programmable city-scale shared multi-user advanced wireless testbed that is being deployed in West Harlem of New York City [1]. To keep pace with the significantly increased wireless link bandwidth and to effectively integrate the emerging C-RANs, COSMOS is designed to incorporate a fast programmable core network for providing connections across different computing layers. A key feature of COSMOS is its dark fiber based optical x-haul network that enables both highly flexible, user defined network topologies and experimentation directly in the optical physical layer. The optical architecture of COSMOS was presented in [2]. In this abstract, we present the tools and services designed to configure and monitor the performance of optical paths and topologies of the COSMOS testbed. In particular, we present the SDN framework that allows testbed users to implement experiments with application-driven control of optical and data networking functionalities. 

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5. Programmable optical x-haul network in the COSMOS testbed

   Gutterman, Craig; Minakhmetov, Artur; Yu, Jiakai; Sherman, Michael; Chenm, Tingjun; Zhu, Shengxiang; Seskar, Ivan; Raychaudhuri, Dipankar; Kilper, Daniel; Zussman, Gil (January 2019, 2019 IEEE 27th International Conference on Network Protocols (ICNP))

   Abstract—The Cloud-Enhanced Open Software Defined Mobile Wireless Testbed for City-Scale Deployment (COSMOS) platform is a programmable city-scale shared multi-user advanced wireless testbed that is being deployed in West Harlem of New York City [1]. To keep pace with the significantly increased wireless link bandwidth and to effectively integrate the emerging C-RANs, COSMOS is designed to incorporate a fast programmable core network for providing connections across different computing layers. A key feature of COSMOS is its dark fiber based optical x-haul network that enables both highly flexible, user defined network topologies and experimentation directly in the optical physical layer. The optical architecture of COSMOS was presented in [2]. In this abstract, we present the tools and services designed to configure and monitor the performance of optical paths and topologies of the COSMOS testbed. In particular, we present the SDN framework that allows testbed users to implement experiments with application-driven control of optical and data networking functionalities. 

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