ad hoc mobile wireless networks

[...]... for ad hoc wireless networks Routing protocols for ad hoc wireless networks Multicast routing protocols for mobile ad hoc networks Transport layer protocols for ad hoc networks Quality of service in ad hoc wireless networks Energy management in ad hoc wireless networks Mobility models for multihop ad hoc wireless networks Cross-layer design issues for ad hoc wireless networks Recent developments in ad. .. passing through the home agent Mobile IP enables mobile computers to move about the Internet but remain addressable via their home network Each mobile computer has an IP address (a home address) on its home network Datagrams arriving for the mobile ­computer at its home network are subsequently repackaged for delivery to the mobile c ­ omputer at its care-of address The mobile computer informs its home... the Field 304 10.5.1 Sensors 304 10.5.2 Wireless Ad Hoc Sensor Networks .305 10.6 Summary .305 10.7 Problems 305 Index 307 AU6221_C000.indd 15 9/21/07 4:31:17 AM AU6221_C000.indd 16 9/21/07 4:31:17 AM Preface Ad hoc networks are autonomous systems which comprise a collection of mobile nodes that use wireless transmission for communication They are self-organized,... technologies are given in Table 1.1 Wireless networks use finite resources, and a given geographical area with many wireless networks will degrade in performance as more users come on For example, a building with 20 competing networks can cause interference and slow performance for all users Wireless networks are flexible and can be deployed quickly using inexpensive radio equipment and antennas The flexibility... today Wireless network speeds do not (yet) fare well against the gigabit AU6221_C001.indd 5 9/21/07 4:33:26 AM   �  Ad Hoc Mobile Wireless Networks speeds achieved by wired networks such as gigabit Ethernet or Fiber ­ However, wireless network technology is rapidly maturing, and new, open ­ standards are emerging that will provide speeds comparable to those of Fiber and other infrastructures Wireless. .. products are expensive AU6221_C001.indd 7 9/21/07 4:33:27 AM   �  Ad Hoc Mobile Wireless Networks An advantage of WiMax is as follows: � Specifically designed for wide area networking Disadvantages of WiMax are the following: � New technology; has not passed the test of time (yet) � More expensive than WiFi 1.1.6 Hotspots Hotspots are wireless networks often run by businesses and individuals They are called... according to the IP address That leads to a big limitation Indeed, within TCP/IP, if the mobile user moves without changing the IP address, the routing is lost; if the user changes the IP address­, connections are lost In both cases, packets are lost That leads to an unreliable network Regarding the specific features of mobility and wirelessness, wireless Internet must do the following: � Give mobile users... a new IP address associated with the new point of attachment Mobile IP has been designed to solve this problem by allowing the mobile node to use two IP addresses In Mobile IP, the home address is static and is used, for instance, to identify TCP connections The care-of address changes at each new point of attachment and can be thought of as the mobile node’s topologically s ­ ignificant address; it... to the home address, it will be ­processed properly by TCP or whatever higher level protocol logically receives it from the mobile node’s IP (that is, layer-3) processing layer In Mobile IP the home agent redirects packets from the home network to the care-of address by constructing a new IP header that contains the mobile node’s care-of address as the destination IP address This new header then shields... place no additional constraints on the assignment of IP addresses AU6221_C001.indd 13 9/21/07 4:33:34 AM 14  �  Ad Hoc Mobile Wireless Networks The Mobile IP can be described with the following steps: � Step 1: Agent discovery � Step 2: Registration home agent � Step 3: Tunneling A mobile node operating away from home registers its new care-of address with its home agent through the exchange of a registration . service in ad hoc wireless networks Energy management in ad hoc wireless networks Mobility models for multihop ad hoc wireless networks Cross-layer design issues for ad hoc wireless networks Recent. protocols for ad hoc wireless networks Routing protocols for ad hoc wireless networks Multicast routing protocols for mobile ad hoc networks Transport layer protocols for ad hoc networks Quality. Other Protocols 21 1.3 What Are Ad Hoc Networks? 21 1.3.1 Differences between Cellular and Ad Hoc Wireless Networks 23 1.3.2 Applications of Ad Hoc Wireless Networks 23 1.3.3 Technical and