Next: Mobility Up: Means of Communication Previous: Disconnected   Contents   Index |
"...with an increasing degree of mobility, the bandwidth of a connection, and as a consequence the amount of data which can be transferred in adequate time, decrease."
Furthermore, disconnected operation may be the result of a network or communication media failure that makes it impossible for the client to stay in contact with the server--an unvoluntary disconnection. The transitions between communication states are shown in Figure 2.1. The transitions between connected and weakly connected are not so common; normally the user of the mobile computer makes a voluntary disconnection before traveling from one place (domain) to another, and then reconnects on arrival. The use of mobile computers is discussed in Section 2.3. As mentioned earlier, (see page ) the mobile clients should experience no degradation of consistency when fully connected, and thus consistency should be restored upon reentering connected mode of operation.
Next: Mobility Up: Means of Communication Previous: Disconnected   Contents   Index |