www mobilevce com 2008 Mobile VCE PIMRC Workshop

www. mobilevce. com © 2008 Mobile VCE PIMRC Workshop “Ubiquitous Services over heterogeneous mobile networks” Cannes, France, 2008 A Combined Mobility and Qo. S Framework for Delivering Ubiquitous Services Dev Pragad Audsin, George Kamel, Paul Pangalos and Hamid Aghvami Mobile VCE Research Centre for Telecommunications Research King’s College London PIMRC Ubiquitous Workshop 2008 1

Outline of the Presentation www. mobilevce. com © 2008 Mobile VCE q Mobility and Qo. S interactions q Concept of Enhanced Nodes: A framework for providing seamless access q Mobility and Qo. S Functions of Enhanced Nodes q An Example: Qo. S based Mobility Selection q Conclusions PIMRC Ubiquitous Workshop 2008 2

Mobility and Qo. S Interactions www. mobilevce. com © 2008 Mobile VCE q Interactions between mobility management and Qo. S have been well-studied in the literature Ø Ø Ø Negative interactions between Qo. S and mobility Usually in the form of a delay during handover Such interactions can cause disruption to ongoing data sessions q It has been recognised that in order to be able to support any form of real-time applications, negative interactions must be suppressed q We propose a framework based on Enhanced Nodes to minimise some of the negative interactions PIMRC Ubiquitous Workshop 2008 3

Need for Enhanced Nodes www. mobilevce. com © 2008 Mobile VCE q Existing networks are often static q Existing networks often have no framework to provide cooperation between mechanisms such as mobility and Qo. S q Many of the mobility, Qo. S and security functionalities have (negative? ) interactions with each other q Hence, a framework for network enhancement is required q This framework is provided by Enhanced Nodes 4 PIMRC Ubiquitous Workshop 2008

Enhanced Nodes (EN) www. mobilevce. com © 2008 Mobile VCE ENs add more intelligence to the network and contain Mobility, Qo. S and Security functionalities q The Mobility functionality subsumes the role of Mobility Anchor Point in HMIPv 6 q Qo. S aspect of the EN subsume numerous functionalities including Qo. S re-establishment after handovers q The ENs have a common communication link established between them to share mobility and Qo. S information of the network and MNs q PIMRC Ubiquitous Workshop 2008 5

Enhanced Node Framework www. mobilevce. com © 2008 Mobile VCE Inter-Network communication Intra-network by

Intra-Network EN Functionalities www. mobilevce. com © 2008 Mobile VCE q The presence of ENs facilitate communication and sharing of information within a network q This can lead to better load balancing, network routing / forwarding and Qo. S path reservation. q The ENs can facilitate handovers between Mobility Anchors (MA) and provide the new MA with information regarding the MN (MA is part of EN functionality). q The ENs can help optimise network performance by providing the network with intelligence required to adapt according to the network state (Example) PIMRC Ubiquitous Workshop 2008 7

Qo. S based Mobility Protocol Selection www. mobilevce. com © 2008 Mobile VCE q We provide a solution to a mobility and Qo. S Routing negative interaction q In agent based micro-mobility protocols such as HMIPv 6 and Net. LMM, the Mobility Anchors acts as a point through which all traffic traverses q This can lead to congestion and overloading of Mobility Anchors while at the same time cause routing overheads and affect the best Qo. S path q Previous work shows that this leads to routing overheads and network congestion and reduction in network capacity PIMRC Ubiquitous Workshop 2008 8

Introduction to the Problem www. mobilevce. com © 2008 Mobile VCE ü There can exist under utilized paths with better Qo. S resources üThe presence of Mobility Anchors can potentially prevent the best Qo. S path to be selected by the QOS routing PIMRC Ubiquitous Workshop 2008 Flow using Mobility Agent 9

Solution with ENs www. mobilevce. com © 2008 Mobile VCE q The ENs can play a very vital role to enhance existing networks and provide solutions to problems such as this q In this problem we aim to have some interaction between mobility and the Qo. S routing to maximise network performance q We aim to achieve this through selecting the best mobility binding update (protocol) for the variety of classes the network supports q This solution will allow more number of high Qo. S applications to have efficient micro-mobility support PIMRC Ubiquitous Workshop 2008 10

Proposed Solution www. mobilevce. com © 2008 Mobile VCE q Route low Qo. S traffic classes when possible around Mobility Anchors q Utilise the lesser congested paths that are under utilised due to routing constraints induced by Mobility Anchors q The lower Qo. S traffic classes can sustain higher handover delays when they do not use Mobility Anchors q The Enhanced Node can provide the framework to support this solution PIMRC Ubiquitous Workshop 2008 11

Traffic Class to Mobility Selection www. mobilevce. com © 2008 Mobile VCE UMTS Traffic Class Example Conversational Voice Type Mobility Protocol Real Time HMIPv 6 Streaming Video/Audio Streaming Interactive Web browsing Best Effort MIPv 6 Background Emails MIPv 6 PIMRC Ubiquitous Workshop 2008 Best Effort 12

Enhanced Node Signalling www. mobilevce. com © 2006 Mobile VCE Signalling (Network State) Registration Request (Binding Update) Perform calculation on classes to use micro-mobility and the potential paths these classes can take to maximise utilisation the of network resources BU ACK with classes to use micro-mobility PIMRC Ubiquitous Workshop 2008 Slide 13 / 22 13

Advantages of the proposed solution www. mobilevce. com © 2008 Mobile VCE q The traffic load and distribution within the network can be balanced efficiently, this case is exemplified for a NEMO network q Micro-Mobility support is prioritised for applications with high Qo. S requirements such as Vo. IP and video conferencing q This can increase the number of active higher Qo. S sessions in the network since these sessions cannot run efficiently without micromobility support in a mobile environment PIMRC Ubiquitous Workshop 2008 14

Conclusion www. mobilevce. com © 2008 Mobile VCE q Provided a framework for network enhancement through Enhanced Nodes q Covered the Mobility and Qo. S aspects of the Enhanced Nodes functionality q Investigated the negative interaction between Agent based micro-mobility solutions and Qo. S routing within a network q Proposed a EN assisted Qo. S traffic class to mobility selection mechanism to reduce the negative interaction between micro-mobility and Qo. S routing PIMRC Ubiquitous Workshop 2008 15