59th IETF Meeting

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59th IETF Meeting
Implementation of Seamless MPEG-4 Streaming over
Mobile IP-enabled Wireless LAN
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Contents

• Mobile IP
• Mobility for IPv4 WG
• Mobility for IPv6 WG
• Mobile Ad-hoc Networks WG
• Conclusions

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Mobile IP

• Mobile IP
• Allows a node to continue using its permanent
  home address as it moves around the Internet.
• Support transparency above the IP layer,
  including maintenance of active TCP connections
  and UDP port bindings.
• Related WG
• mip4 - Mobility for IPv4
• mip6 - Mobility for IPv6
• mipshop - MIPv6 Signaling and Handoff
  Optimization
• nemo - Network Mobility
• seamoby - Context Transfer, Handoff Candidate
  Discovery, and Dormant Mode Host Alerting
• mobopts IP Mobility Optimizations (in IRTF)

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Mobility for IPv4 WG - introduction

• Besides the basic Mobile IPv4 (MIPv4) protocols,
  deal with concerns such as optimization,
  security, extension, AAA support, and deployment
  issues
• Focus on deployment issues
• Address known deficiencies and shortcomings in
  the protocol that have come up as a result of
  deployment experience
• Facilitate interactions with AAA(Authentication,
  Authorization and Accounting) environment
• Facilitate interactions with enterprise
  environments when MIPv4 is used therein
• Update existing protocol specifications in
  accordance with deployment needs and advancing
  those protocols that are on the standards track

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Mobility for IPv4 WG - discussion

• Experimental messages issue
• Discuss whether adding experimental sub-type
  number or not
• Dynamic HA assignment last call issue
• Proposes a messaging mechanism for dynamic home
  agent assignment and HA redirection.
• A mechanism to assign an optimal HA for a Mobile
  IP session while allowing any suitable method for
  HA selection.
• Optimized Mobile IPv4 UDP Encapsulation
• Minimize MIPv4 data packet overhead when UDP
  encapsulation RFC-3519 is used. RFC-3519 -
  Mobile IP Traversal of Network Address
  Translation Devices
• Applicability
• MIP/VPN or basic IPsec-over-MIPv4
• VoIP over MIP
• Specify an extension to be used in conjunction
  with RFC-3519 to enable the overhead optimization

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Mobility for IPv4 WG - discussion

• Fragmentation MTU Extensions
• Problem
• Large packets sometimes dropped by routers
• If DF0, may still be dropped
• If DF1, MIP suffers from ICMP black holes
• Realistic deployment issue
• E.g. one ADSL box silently drops packets gt 1360
  (if DF0)
• RRQ/RRP goes through but some traffic is
  blackholed!
• RFC 3519 fragment before encapsulation
• This issue could be avoided by
• robust discovery of MTU
• configurable, negotiated MTU
• Solution signal preferred MTU for reception
• MN and HA send independently
• MTU effectively restricted if both sides send the
  extension with preferred MTU for reception
• If only one side supports, ignored by receiver
• Applies to both IP-IP and IP-over-UDP

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Mobility for IPv6 WG - introduction

• Primary Goal
• Enhance base IPv6 mobility by continuing work on
  developments that are required for wide-scale
  deployments
• Enhancements of basic IPv6 mobility (WG items)
• A bootstrap mechanism for setting up security
  associations between the Mobile Node(MN) and Home
  Agent(HA)
• Improving home agent reliability
• Support for a Mobile Node changing its home
  address
• Route optimization require security mechanisms
  for trusting and updating the binding
  information.
• Problem statements associated with deploying
  MIPv6
• MIPv6 issues in the presence of firewalls
• MIPv6 deployment and transition issues in the
  presence of IPv4/IPv6 networks
• Multicast issues

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Mobility for IPv6 WG - discussion

• Mobile IPv6 Bootstrapping Problem Statement
• Dynamic bootstrapping has many potential benefits
  to simplify deployment and network management
• Home agent and prefix discovery protocols have
  limitations from security and network management
  perspectives
• Required on mechanisms to facilitate dynamic
  bootstrapping
• HA Reliability Problem Statement
• Home Agent failure
• Delayed Failure Detection
• Failure Recovery
• IPsec Security Association
• Security vulnerabilities
• Load balancing

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Mobility for IPv6 WG - discussion

• Mobility in a Dual Stack Internet
• MIPv4(or 6) allows IPv4(or 6) node to move in
  IPv4(or 6) networks
• Internet will be a mixture of IPv4, IPv6 and Dual
  Stack networks
• Signaling, processing, and implementation
  overheads
• ? Use the tunneling capability of Mobile IP to
  forward both IPv4 and IPv6 traffic over the same
  Mobile IP created tunnel
• Binding Update Backhauling(BUB)
• Enhancement to Route Optimization when two
  end-points are mobile
• Optimizing Mobile IPv6
• Optimization of Route Optimization via a
  DH(Diffie-Hellman) exchange between MN-CN

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Mobile Ad-hoc Networks WG - introduction

• Primary Goal
• Standardize IP routing protocol functionality
  suitable for wireless routing application within
  both static and dynamic topologies
• Fundamental design issues
• The wireless link interfaces have some unique
  routing interface characteristics
• Node topologies within a wireless routing region
  may experience increased dynamics, due to motion
  or other factors
• Direction
• Targeting the promotion of a number of core
  routing protocol specifications to experimental
  RFC status (i.e., AODV, DSR, OLSR, and TBRPF).
• Move on to design and develop MANET common group
  engineered routing specification(s)
• Address the aspects of security and congestion
  control in designed routing protocols

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Mobile Ad-hoc Networks WG - discussion

• MANET Address Autoconfiguration Issues
• Automatic IP address configuration is necessary
  in MANET experiencing dynamic topology changes
• Support of Internet Connectivity for AODV
• New route determination and forwarding algorithms
  are proposed.

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Conclusions

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