Presenter: Wu-Hong TsaiDate: 2010/11/01

Wireless mode consists of MobileNodeMobileNode + additional features multi-hops

ad-hoc networks, wireless LAN etc.MobileNode is a split object.MobileNode = basic Node object +

moving ability within a given topology, receiving and transmitting signal from and to the

wireless channelA major difference between MobileNode and

NodeMobileNode is not connected Links Nodes

MobileNodes

Four ad-hoc routing protocols1. Destination Sequence Distance Vector

(DSDV)2. Dynamic Source Routing (DSR)3. Temporally Ordered Routing Algorithm

(TORA)4. Ad-hoc On-demand Distance Vector (AODV)

Code Examples ~/ns-2.34/tcl/ex/simple-wireless.tcl ~/ns-2.34/tcl/ex/wireless-test.tcl

Code Examples:

802.11 MAC protocolContention based MAC protocol

Preamble based TDMA protocolTime slotsCurrently, ns supports a single hop, preamble-

based TDMA MAC protocolGSM, …

DSDVDSRTORAAODV

The trace support for wireless simulations currently use cmu-trace objects.CMUTrace/Drop,CMUTrace/Recv,CMUTrace/Send

Example:r 160.093884945 _6_ RTR --- 5 tcp 1492 [a2 4 6 800] ------- [65536:0 16777984:0 31 16777984] [1 0] 2 0

Node ID: 6, UID: 5, TCP packet, Header Size: 1492, Channel: a2

65536:0 = 00010000 = 0.1.0:0, 16777984:0 = 01000300 = 1.0.3:0

TTL: 31, TCP seqno, ackno: [1 0]

Wireless model extended wired + wireless wired-cum-wireless

Wireless model: multi-hop ad-hoc networks or wireless LAN

Wireless model extended:Multiple WLANs connected through wired nodemobileIP

Routing considerations:Wireless model has no Links concept,

wired nodes wireless nodes?BaseStationNode