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Limitation of Basic Mobile IP
Limitation of Basic Mobile IP
Mobile IP supports mobility across both homogeneous and heterogeneous systems.
It is well suited for macro mobility management, but less suited for micro mobility management.
Limitation of Basic Mobile IP
Non-optimal routing
all packets are routed to Home Agent
Handoffs
no provisions for forwarding
in-flight datagrams are lost
Security and QoS
Limitation 1 IETF Route Optimization
Triangular routing problem
Packets sent from to an MN are first intercepted by the HA and then tunneled to the MN. However, packets from the MN are sent directly to . This triangular routing problem results munication routes significantly longer than the optimal routes and introduces extra delay for packet delivery.
Optimal Routing
allows corresponding nodes to keep care-of address bindings
CN -> MN routing can then be optimal
problem: how to s
Cannot register with s
Limitation 2 Handoff Management in MIP
When an MN moves from one to another, the handoff procedure is carried out by the following steps:
The MN obtains a new CoA when it enters a new .
The MN registers the new CoA with its HA. The HA sets up a new tunnel up to the end point of the new CoA and removes the tunnel to the old CoA.
Once the new tunnel is set up, the HA tunnels packets destined to the MN using the MN’s new CoA.
Limitation 3
Security and QoS
Security
– authentication with FA problematic, for the FA typically belongs to anization
– no protocol for key management and key distribution has been standardized in the
– patent and export restrictions
Firewalls
– typically mobile IP cannot be used together with firewalls, special setups are needed (such as reverse tunneling)
Security and QoS
QoS
– many new reservations in case of RSVP
– tunneling makes it hard to give a flow of packets a special treatment needed for the QoS
Security, firewalls, QoS etc. are topics of current research and discussions!
MIP扩展
1 Low Latency Handoffs in Mob
Limitation of Basic Mobile IP
Mobile IP supports mobility across both homogeneous and heterogeneous systems.
It is well suited for macro mobility management, but less suited for micro mobility management.
Limitation of Basic Mobile IP
Non-optimal routing
all packets are routed to Home Agent
Handoffs
no provisions for forwarding
in-flight datagrams are lost
Security and QoS
Limitation 1 IETF Route Optimization
Triangular routing problem
Packets sent from to an MN are first intercepted by the HA and then tunneled to the MN. However, packets from the MN are sent directly to . This triangular routing problem results munication routes significantly longer than the optimal routes and introduces extra delay for packet delivery.
Optimal Routing
allows corresponding nodes to keep care-of address bindings
CN -> MN routing can then be optimal
problem: how to s
Cannot register with s
Limitation 2 Handoff Management in MIP
When an MN moves from one to another, the handoff procedure is carried out by the following steps:
The MN obtains a new CoA when it enters a new .
The MN registers the new CoA with its HA. The HA sets up a new tunnel up to the end point of the new CoA and removes the tunnel to the old CoA.
Once the new tunnel is set up, the HA tunnels packets destined to the MN using the MN’s new CoA.
Limitation 3
Security and QoS
Security
– authentication with FA problematic, for the FA typically belongs to anization
– no protocol for key management and key distribution has been standardized in the
– patent and export restrictions
Firewalls
– typically mobile IP cannot be used together with firewalls, special setups are needed (such as reverse tunneling)
Security and QoS
QoS
– many new reservations in case of RSVP
– tunneling makes it hard to give a flow of packets a special treatment needed for the QoS
Security, firewalls, QoS etc. are topics of current research and discussions!
MIP扩展
1 Low Latency Handoffs in Mob
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