IPv6 – various

Diameter – http://en.wikipedia.org/wiki/Diameter_%28protocol%29

Upgrade from RADIUS

The name is a pun on the RADIUS protocol, which is the predecessor (a diameter is twice the radius). Diameter is not directly backwards compatible, but provides an upgrade path for RADIUS. The main differences are as follows:

  • Reliable transport protocols (TCP or SCTP, not UDP)
  • Network or transport layer security (IPsec or TLS)
  • Transition support for RADIUS, although Diameter is not fully compatible with RADIUS
  • Larger address space for attribute-value pairs (AVPs) and identifiers (32 bits instead of 8 bits)
  • Client-server protocol, with exception of supporting some server-initiated messages as well
  • Both stateful and stateless models can be used
  • Dynamic discovery of peers (using DNS SRV and NAPTR)
  • Capability negotiation
  • Supports application layer acknowledgements, defines failover methods and state machines (RFC 3539)
  • Error notification
  • Better roaming support
  • More easily extended; new commands and attributes can be defined
  • Aligned on 32-bit boundaries
  • Basic support for user-sessions and accounting


Stream Control Transmission Protocol


SCTP in battlefield networks

– 2001

(Citations: 7)

Phillip T. Conrad, Gerard J. Heinz, Armando L. Caro, Paul D. Amer, John Fiore

ABSTRACT The Stream Control Transmission Protocol (SCTP) is a new Internet standards track transport layer protocol. SCTP was originally designed to transport PSTN signaling messages over IP networks, but is also capable of serving as a general purpose transport protocol. As such, SCTP provides an alternative that may be better able to satisfy the requirements of future battlefield networks than the traditional transport protocols, TCP and UDP. Unlike traditional transport protocols, SCTP allows multiple streams of messages within a single connection (or, in SCTP terminology, a single association). As the results in this paper show, this ability is particularly helpful in reducing latency for streaming,multimedia in high loss environments. SCTP also provides features for multi-homing that may be helpful in highmobility environments,and additional security against denial-of-service attacks based on SYN flooding.

Sensor Data Collection Through Gateways in a Highly Mobile Mesh Network

(Citations: 2)

Andrew Jenkins, Daniel Henkel, Timothy X Brown

Abstract—Widely distributed sensors must discover paths back to data collection points possibly through sparsely connected and mobile networks. Current addressing and service discovery schemes in mobile networks are not well-suited to multihop disconnected networks. This paper describes an architecture and protocol for sensor data collection through highly mobile ad- hoc network (MANET) that may never experience end-to-end connectivity. Special gateway nodes are described which are responsible for intelligently routing messages to their intended destination(s). These gateway nodes qualify their links and announce their status to the MANET, a simple approach to service discovery that is effective in this implementation. The protocol is implemented and tested in a laboratory and outdoor environment.


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