Networks and Mobile Systems


overview - Elevator pitch
projects - Projects
people - Who are we?
publications - NMS Papers
software - Software and hardware releases from the NMS group
support - Who sponsors NMS?


The NMS group at MIT's Computer Science and Artificial Intelligence Laboratory conducts research in many areas of networking: wireless networks, Internet architecture and protocols, overlay and peer-to-peer networks, sensor networks, network security, and networked systems. The group was formed in 1998.

Current projects

  • Datacenter networks and cloud infrastructure
    • Fastpass and Flowtune
    • Domino: programmable router data planes
    • Flexplane: whole-network emulation in software for programmability
  • Mobile and sensor computing
    • Glimpse: a continuous object recognition system
  • Transport protocols and mechanisms
    • Remy (TCP ex machina, computer-synthesized congestion control)
    • Mahimahi (record-and-replay framework for web traffic)
Unfortunately, the above list might be a bit out-of-date. The NMS papers page has a more current list of papers.

Some past projects

Internet architecture, overlay and P2P networks

P2P and overlay networks
  • Chord: a scalable and robust distributed hash table (DHT) enabling key-value lookups.
  • Project IRIS: A multi-institution NSF ITR collaboration that developed the network and system infrastructure for resilient Internet services using DHTs. Our work included:
    • Dynamic evolution of P2P systems: The amount of work required to maintain good connectivity depends on the "half-life" of a P2P system.
    • SFR (Semantic-Free Referencing), a reference (name) resolution service for linked systems.
    • DOA (Delegation-Oriented Architecture), an extension to the Internet architecture that accommodates "middleboxes" in an architecturally coherent way using a new delegation primitive.
    • DQE (Distributed Quota Enforcement), a spam control system.
    • Speak-up, a defense against application-level DDoS attacks.
  • RON (Resilient Overlay Networks): Improving availability and resilience of Internet paths using application-controlled overlay routing.
  • MONET: Multi-homed overlay network of web proxies to route around network failures for Web applications.

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Congestion control, traffic engineering
  • XCP (eXplicit Congestion Control) and TeXCP: Congestion control for high bandwidth-delay product networks and responsive traffic engineering.
  • CM (Congestion Manager), an integrated end-to-end congestion management architecture and congestion control algorithms for the future Internet.
  • OxygenTV: rate adaptation and error control for MPEG-4 delivery.
Internet routing
  • rcc and correct Internet routing: tools to improve routing correctness and experimental studies of Internet routing and failures.
  • R-BGP: Improving Internet routing connectivity.
  • BGPSep: Constructing correct and scalable iBGP configurations.
Network measurement
  • DNS analysis: trace-based analysis of DNS performance and caching.
  • M&M; tools: multiQ and mystery, passive measurement tools suitable for large scale studies of Internet path characteristics
  • Routing analysis: BGP measurements.

Wireless, mobile, and sensor networks

  • CarTel: a mobile sensor network system developing vehicular network protocols, software, and services.
  • Cricket: An accurate indoor location system. (Now commercially available.)
  • SoftPHY and its applications: using cross-layer confidence information (SoftPHY) from the physical layer to design better higher-layer wireless network protocols.
  • INS is an intentional naming system for scalable and dynamic resource discovery. Twine aims to make INS scalable to large networks using peer-to-peer lookups, built on top of Chord.
  • Migrate, an end-to-end architecture for Internet host mobility, support for suspend/resume operations for mobile network applications to handle disconnections, and server failover.
  • Harnessing multiple radios and access points
    • FatVAP: Aggregating AP backhaul bandwidth.
    • Horde: networking software that allows an application to stripe data from multiple streams across a set of dissimilar wireless network channels.
    • Divert: a multi-radio, fine-grained path selection system for improving throughput in wireless LANs.
    • APware: improving performance and robustness for multi-rate wireless LANs.
  • Fusion: Mitigating congestion in wireless sensor networks.
  • BSD (Bounded SlowDown), Span, LEACH and Spin: energy-efficient protocols for wireless and sensor networks
  • Spectrumware: new algorithms for radio and wireless physical layers for implementation on a flexible software platform. (Now commercially available.)
  • Blueware, protocols for internetworking with Bluetooth.

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  • AIP (Accountable Internet Protocol): self-certifying Internet addresses + new protocols to provide accountability and improve Internet security.
  • Kill-Bots: Surviving application-layer botnet attacks that mimic flash crowds.
  • Real-Time anomaly detection: Improving network security with real-time scanning and worm detection.
  • Speak-up, a defense against application-level DDoS attacks using bandwidth as a "currency".
  • DQE (Distributed Quota Enforcement), a spam control system.
  • Securing SSH from address harvesting attacks.
  • Infranet: circumventing Web censorship and surveillance.
  • RoboNorm: Efficient and robust TCP stream normalization.

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Distributed data management, stream processing

  • Medusa: Distributed data stream processing.
  • HRDB: Database fault-tolerance with heterogeneous replication.

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M. I. T. Computer Science and Artificial Intelligence Laboratory · 32 Vassar Street · Cambridge, MA 02139 · USA