Ad Hoc Mobile Wireless Networks: Principles, Protocols and by Subir Kumar Sarkar

By Subir Kumar Sarkar

Advert Hoc cellular instant Networks: ideas, Protocols, and functions deals the newest strategies, suggestions, and aid concerning the layout and function of advert hoc instant networks. This booklet provides the basics of instant networks, protecting Bluetooth, IrDA, HomeRF, WiFi, WiMax, instant net, and cellular IP. every one bankruptcy presents correct examples and difficulties to demonstrate techniques. It addresses caliber of carrier, strength administration, pass layer layout matters, and up to date advancements. The e-book additionally presents mobility versions for multi-hop advert hoc instant networks and explores quite a few protocols equivalent to MAC layer, shipping layer, routing, and multicast routing.

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Extra resources for Ad Hoc Mobile Wireless Networks: Principles, Protocols and Applications

Example text

1 Working of Mobile IP IP routes packets from a source endpoint to a destination by allowing routers to ­forward packets from incoming network interfaces to outbound interfaces according to information available in the routing tables. The routing tables typically maintain the next-hop information for each destination IP address, according to the number of networks to which that IP address is connected. The network ­number is derived from the IP address by masking off some of the low-order bits.

On the other hand, header overhead is reduced. indd 18 9/21/07 4:33:37 AM Introduction � 19 Src Dest Proto X MH ? Payload FOREIGN AGENT Encapsulatated Diagram Src Dest Proto Src Dest Proto HA COM 4 or 55 X MH ? Payload HOME AGENT Src Dest Proto X MH ? 5 Tunneling operations in Mobile IP. 8 Issues in Mobile IP The most pressing outstanding problem facing Mobile IP is that of security, but other technical as well as practical obstacles to deployment exist. 1 Routing Inefficiencies The base Mobile IP specification has the effect of introducing a tunnel into the routing path followed by packets sent by the correspondent node to the mobile node.

5 shows the tunneling operations in Mobile IP. The default encapsulation mechanism that must be supported by all mobility agents using Mobile IP is IP-within-IP. Using IP-within-IP, the home agent, the tunnel source, inserts a new IP header, or tunnel header, in front of the IP header of any datagram addressed to the mobile node’s home address. The new tunnel header uses the mobile node’s care-of address as the destination IP address, or tunnel destination. The tunnel source IP address is the home agent, and the tunnel header uses 4 as the higher level protocol number, indicating that the next protocol header is again an IP header.

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