Mobile Cloud Networking and Mobility Control 117
– because of the agent, it is possible to match the base address to
the provisional address and send the connection request to the mobile.
This solution is similar to that used in mobile networks.
The terminology employed in IP Mobile is as follows:
– Mobile Node: terminal or router which changes its attachment
point from one sub-network to another;
– Home Agent: router of the sub-network with which the mobile
node is registered;
– Foreign Agent: router of the sub-network being visited by the
mobile node.
The IP Mobile environment is formed of three relatively separate
functions:
– agent Discovery: when the mobile arrives in a sub-network, it
searches for an agent capable of handling it;
– registration: when a mobile is outside of its home domain, it
registers its new address (Care-of-Address) with its Home Agent.
Depending on the technique used, registration may take place directly
with the Home Agent, or be done through the Foreign Agent;
– tunneling: when a mobile is outside of its home sub-network, the
packets need to be delivered to it by way of the technique of
tunneling, which links the Home Agent to the Care-of-Address.
Figures 5.11 and 5.12 illustrate the arrangement of communication
in IP Mobile for IPv4 and IPv6.
5.5.2. Solutions for micromobility
Various protocols have been put forward by the IETF for the
management of micromobility in order to improve IP Mobile. Indeed,
micromobility solutions are primarily intended to reduce the signaling
messages and the latency of handover caused by the mechanisms of IP
Mobile. Generally, we distinguish two categories of approaches for
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– because of the agent, it is possible to match the base address to
the provisional address and send the connection request to the mobile.
This solution is similar to that used in mobile networks.
The terminology employed in IP Mobile is as follows:
– Mobile Node: terminal or router which changes its attachment
point from one sub-network to another;
– Home Agent: router of the sub-network with which the mobile
node is registered;
– Foreign Agent: router of the sub-network being visited by the
mobile node.
The IP Mobile environment is formed of three relatively separate
functions:
– agent Discovery: when the mobile arrives in a sub-network, it
searches for an agent capable of handling it;
– registration: when a mobile is outside of its home domain, it
registers its new address (Care-of-Address) with its Home Agent.
Depending on the technique used, registration may take place directly
with the Home Agent, or be done through the Foreign Agent;
– tunneling: when a mobile is outside of its home sub-network, the
packets need to be delivered to it by way of the technique of
tunneling, which links the Home Agent to the Care-of-Address.
Figures 5.11 and 5.12 illustrate the arrangement of communication
in IP Mobile for IPv4 and IPv6.
5.5.2. Solutions for micromobility
Various protocols have been put forward by the IETF for the
management of micromobility in order to improve IP Mobile. Indeed,
micromobility solutions are primarily intended to reduce the signaling
messages and the latency of handover caused by the mechanisms of IP
Mobile. Generally, we distinguish two categories of approaches for
www.it-ebooks.info