From active networks to cognitive networks
1 / 20

From Active Networks to Cognitive Networks - PowerPoint PPT Presentation

  • Uploaded on

From Active Networks to Cognitive Networks. Manolis Sifalakis University of Lancaster. Overview. The Vision: Cognitive Networks (a long term aim) Motivation: Case scenario(s) Structure Fundamental requirements The role of Active Networks

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
Download Presentation

PowerPoint Slideshow about 'From Active Networks to Cognitive Networks' - darice

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
From active networks to cognitive networks

From Active Networks to Cognitive Networks

Manolis Sifalakis

University of Lancaster


  • The Vision: Cognitive Networks (a long term aim)

    • Motivation: Case scenario(s)

    • Structure

    • Fundamental requirements

    • The role of Active Networks

  • A Service Deployment Toolkit (a short term objective)

    • Key principals

    • Toolkit functionality

    • The benefits

    • Example deployment

Dahstuhl Seminar 04411

Part a the vision cognitive networks
Part A – The Vision: Cognitive Networks

  • A new generation of service networks

    • Properties:

      • Cognitive actions based on Reasoning

      • Autonomic operation

      • Adaptive functionality

      • Self Manageability

    • Aims:

      • Resilient servicing

      • Service Dependability … (even when hardware fails)

Dahstuhl Seminar 04411

Case scenario weekend dos attack
Case Scenario: Weekend DoS Attack

  • Problem Description

    • Scientists run lengthy experiments using network resources throughout the weekend

    • Administrators not working in weekends

    • DoS attack launched on Fri night

    • No support & service disruption for 3 (at least) days

  • Observation

    • The vast majority of attacks today are recipe style and follow specific patterns

  • Cognitive Solution

    • “Train” a classification system to detect the attack patterns

    • Find a suitable software to respond to the attack detection

    • Use active networks to dynamically deploy/upgrade the “defence system” whenever/wherever needed

Dahstuhl Seminar 04411

Case scenario roaming multimedia user
Case Scenario: Roaming Multimedia User

  • Problem Description

    • Mobile user attends a confidential videoconference

    • At every visited network needs sustainable media quality and security services

    • Some or all of these services, cannot be available in every network and on a per user basis

  • Cognitive solution

    • Provide a set of basic active service components for proxy, encryption, anonymizing, MPLS, and transcoding

    • Develop an “intelligent” personalised agent

      • to “sense”/investigate the visited environment and

      • combine and deploy the modules in correct order and correct locations

    • Use active networks to deploy them dynamically wherever/whenever required

Dahstuhl Seminar 04411

Case scenario sensor network deployment
Case Scenario: Sensor Network Deployment

  • Problem Description

    • Randomly laid semi-mobile devices

    • Collection of environmental data in a natural catastrophes sensitive environment

    • Need for auto-configuration, integration in the mesh, reliable, secure & safe exchange of data

    • Varying environmental conditions impact the network performance

    • Different network setups perform better in different environments => need for adaptive solutions

  • Cognitive solution

    • Use some AI-based context aware elements to detect & assess the environment changes & select suitable protocol suites and network configurations

    • Design a p2p system for the synchronisation and coupling of the network devices at the service level

    • Use active networks for the on-line and dynamic configuration and update of the coupling elements and control service modules

Dahstuhl Seminar 04411

The key technologies
The Key Technologies

  • A combination of

    • A.I. strategies

    • Policy enforcement systems

    • (Mobile) agent technologies

    • Active & Programmable networks

    • P2P systems

    • Semantic based services/languages/tools

    • Context aware services

    • … etc

Dahstuhl Seminar 04411

How a layered structure
How ? … A Layered Structure

  • Cognition is twofold:

    • User Servicing

    • Network Management

  • Active Networks:

    • Collection of information

    • Action implementation

Dahstuhl Seminar 04411

Fundamental requirement
Fundamental Requirement

  • Key Requirement:

    • Decoupling of service management from infrastructure management

    • More persistent service provisioning even when the underlying infrastructure fails

  • Active Networks seem to be the definite enabling technology to satisfy the requirement

    • On-line adaptability

    • Programmability

    • Dynamic service (de/re-)composition

Dahstuhl Seminar 04411

Problems in active network research
Problems in Active Network Research

  • Multiple diverse platforms – Non interoperable!

  • Many specialised architectures – Almost none generic enough!(maybe FAIN in the future ?)

  • Several implementations – Most still in the lab!

  • Several applications – Few that necessitate the use of active/programmable technologies

  • Lack of frameworks for large scale and multi-platform deployment

  • Security issues and complexity in management and administration

  • Funding seems to be gradually finishing…!!!

Dahstuhl Seminar 04411

Part b a toolkit for generic service deployment
Part B – A Toolkit for Generic Service Deployment

  • A collection of low-level & lightweight tools (active services).

  • Main Objectives:

    • Assist the large-scale deployment and interoperability of active resources (services, platforms, EEs, etc).

    • Enable decoupling and abstraction of active service deployment from infrastructure management

  • Key Functionalities:

    • Determine the interfacing between active resources (platforms, protocols, service components)

    • Discover and recruit active nodes

    • Deploy active service components

    • Assist the organisation and management of composite services provisioning

Dahstuhl Seminar 04411

Active node discovery recruitment
Active Node Discovery & Recruitment

  • Organisation of global active resources in 2-level overlay topology for control path comm. (discovery, allocation, coordination)

    • Intradomain (intra-AS)

    • Interdomain (Inter-AS)

  • Full functionality at each level independently

  • Designated Active Nodes are the connecting links between the 2-levels

  • Interdomain level interconnectivity follows the AS connectivity pattern

  • Distributed network pool model: Active nodes that cannot serve more requests, leave the overlay

  • Issues

    • Dynamic, automatic & optimal formation of the intradomain overlay

    • Automatic (s)election of the designated node

    • Interdomain connectivity when non active network enabled AS is interjected

    • Handling of overlay partitioning

Dahstuhl Seminar 04411

An active proxy well why not many of them
An Active Proxy … well, why not many of them

  • An active service per se

  • Role:

    • abstract the service rollout process,

    • decouple the service “acquisition” from the service deployment

    • Available to users through intradomain multicast/anycast

  • Benefits:

    • Single point of trust and control

    • Offload the end node from the service rollout instrumentation

Dahstuhl Seminar 04411

Unified active service deployment
Unified Active Service Deployment

  • Need for a generic and abstract service deployment interface

    • Allocate resources

    • (Un-)Install Services

    • (Re-)Configure service provisioning

    • (De-)Activate servicing

  • Must abstract any platform-specific service loading mechanism

  • ASDP protocol. Ongoing work on a newer version.

Dahstuhl Seminar 04411

Organisation management of service composites
Organisation & Management of Service Composites

  • Cooperating service components organise in p2p overlays for signalling and control path management

  • P2P systems use application level (i.e. e2e) performance inefficient solutions

  • A dynamic kernel level tunnelling mechanism

    • Performance efficient, dynamic, low level p2p overlay construction

    • Application (service) specific routing at kernel level

    • Unified API shared by all active applications

Dahstuhl Seminar 04411

Active service mobility framework
Active Service Mobility Framework

  • Mobilisation/migration of running active service components between active nodes

  • Benefits:

    • Resists infrastructure failures,

    • Enhances user mobility

    • Adapts to network weather changes

  • Based on the programmable switch approach

  • Combines strengths and overcomes limitations of active capsule and mobile agent technologies:

    • Low level forwarding path programmability

    • Out-of-band deployment and management

  • Also considered in FAIN but not implemented(?)

Dahstuhl Seminar 04411

How they all fit together in one ee
How they all fit together… in one EE

Dahstuhl Seminar 04411

An example dos detection interception service
An Example: DoS Detection/Interception Service

  • Toolkit functionality:

    • Distributed, (semi-)mobile agent service

      • Migrating sensor elements (Sx) use the service mobility framework

      • Agent modules (C, Sx, F) form a p2p group (control path coordination) using the dynamic kernel tunnelling service

    • Active resource availability checked thru the global network overlay of active resources

    • Requests for service deployment, serviced by active proxies

    • Installation and activation of service components uses the unified active service deployment interface

  • Cognitive logic

    • Resource mgmt level (Active Proxies: what/where to deploy w.r.t. service specification)

    • Service level (recognition and classification of traffic patterns and counteraction)

Dahstuhl Seminar 04411

Related work
Related Work

  • Mainly from ETH ... But elsewhere as well

    • Chameleon

    • Netkit

    • FAIN

    • Alpine

    • Etc …

  • They focus mainly at the interfacing and deploying servicing elements (within a platform)

  • We try to address problems at a lower level: Interfacing and cooperation between platforms

  • Both complementary as well as necessary

Dahstuhl Seminar 04411


  • The road to CognitiveNet-Shire passes from the ActiveNet-Land 

  • It’s a long way and there is still lots of space for research

    • Large scale deployment of active nodes (coordination & organisation)

    • Platform interoperability

    • Security

    • Dynamic (on-line) service composition

    • … etc

  • Lots of applications:

    • User mobility,

    • Ad-hoc & sensor networks,

    • Network/service self-management, auto-configuration, survivability

    • …etc

  • Need more …imagination, vision & funding !!! 

Dahstuhl Seminar 04411