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Radio to Router Interface Framework and Requirements

Radio to Router Interface Framework and Requirements. Bow-Nan Cheng, Leonid Veytser , David Ward Presented by Joe Macker at IETF 83 – March 25-30, 2012. Document Goal. Purpose : To provide a framework to help evaluate radio-to-router interface (R2RI) protocols in MANET environments Why?

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Radio to Router Interface Framework and Requirements

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  1. Radio to Router Interface Framework and Requirements Bow-Nan Cheng, Leonid Veytser, David Ward Presented by Joe Macker at IETF 83 – March 25-30, 2012

  2. Document Goal • Purpose: To provide a framework to help evaluate radio-to-router interface (R2RI) protocols in MANET environments • Why? • Enables heterogeneous networking • Exposes radio layer information to the router to provide more effective routing in MANET • Confusion on what R2RI protocols should and should not do • Many R2RI protocols currently being vetted through IETF: RFC4938/5578, R2CP, DLEP, Modemlpa • Document Content: • R2RI Framework Description/Definitions • Assumptions • Requirements • Additional Considerations

  3. R2RI Framework Description Local Neighbor Remote Neighbor Router Peer Radio Peer Radio Peer Router Peer Router Radio Radio Router Link Protocol (e.g. 802.11) R2RI R2RI R2RI Link Metric Exchange R2RI Link Metric Exchange The radio-to-router interface (R2RI) framework sets up the description, assumptions, requirements, and features to evaluate R2RI protocols. R2RI protocols comprised of a set of messages, message exchanges, and actions dedicated to passing layer 2 radio information obtained by the radio to the routerand passing layer 3 network information about traffic flows and requests to the radio. The goal of the R2RI is to provide a common and extendable framework to share key information between the radio and router to enable effective multi-hop routing and flow control in a heterogeneous wireless network.

  4. R2RI Framework Description Local Neighbor Router Peer Radio Peer Router Radio R2RI R2RI Link Metric Exchange • Key Concepts • Local radio and router are connected by a high data rate/wired medium • R2RI communication is only between local radio and local router  No over the air communications • R2RI allows radio and router to share information • R2RI should provide flow control between radio and router

  5. Summary • Separating radio and router functionality enables heterogeneous networking • Defining a common radio-to-router interface to share radio metrics with network layer routing is important to taking advantage of link quality in routing • There are several R2RI protocols currently being vetted through the IETF  to evaluate the suitability of these protocols and drive standardization, it is important to establish a framework of requirements and assumptions • The goal of the document is to provide a framework to evaluate R2RI protocols and identify issues and potential workarounds

  6. Questions/Comments? • Bow-Nan Cheng (bcheng@ll.mit.edu) • Leonid Veytser (veytser@ll.mit.edu) • David Ward (david.ward@ll.mit.edu)

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