By Hossam Afifi; Djamal Zeghlache
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Extra info for Applications and services in wireless networks
This is vital for a switch to choose the minimum loaded alternative path. • DIVERTING: this message modifies the routing tables in the affected switches. This message includes the ID of the initiating switch and the VPI/VCI number of the affected connection. The ATM traffic classes are used by the algorithm to select the suitable connection for diverting: UBR, ABR, VBRnrt (because in this case of traffic, CDV – Cell Delay Variation – is not defined) connections are appropriate for diverting to a longer path.
After this extension, the new BS measures the length of the current path of the connection, and if it is more than j-times longer than the optimal path, then it results in a completely new path setup. The periodic optimization also ensures the loop-freeness of the path and prevents forming non-optimal (very long) connection paths. The optimization has a third positive effect: because it diverts non-real-time and non-delay-sensitive connections from heavily loaded links to links with more free capacity, it spreads the load over the whole network evenly.
This uses a special packet format, including the home IP address of the mobile host. 2) The foreign BB asks the home BB for the SLS of the mobile host. It has to use the home IP address of the mobile host for the query. 3) The home BB transmits the SLS to the foreign BB using the packet format shown in Figure 2. 4) The foreign BB replaces the home IP address of the mobile node with the careof address and configures the routers in its network. The home BB reconfigures the routers in the home network to release the resources used by the mobile user.