taxonomy and an ad-hoc networks overview
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Taxonomy and an Ad-hoc Networks Overview
What network type to select??
Some characteristics of Ad-hoc networks
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Wireless network taxonomy
single hop multiple hops
infrastructure (e.g., APs)
no infrastructure
host connects to base station (WiFi, WiMAX, cellular) which connects to
larger Internet
no base station, no connection to larger Internet (Bluetooth,
ad hoc nets)
host may have to relay through several
wireless nodes to connect to larger
Internet: mesh net
no base station, no connection to larger
Internet. May have to relay to reach other a given wireless node
MANET, VANET
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Classification of wireless networks
Cellular networks Hybrid Wireless networks
Wireless mesh networks
Wireless sensor networks
Infrastructure-dependent (single-hop wireless networks)
Ad-hoc wireless networks (multi-hop wireless networks)
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Cellular networks vs ad-hoc networks
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Cellular networks vs ad-hoc networks
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Applications of ad-hoc networks
Military
Collaborative and distributed computing
Emergency operations
Wireless mesh networks
Wireless sensor networks
Hybrid wireless networks
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Classification of wireless networks
Cellular networks Hybrid Wireless networks
Wireless mesh networks
Wireless sensor networks
Infrastructure-dependent (single-hop wireless networks)
Ad-hoc wireless networks (multi-hop wireless networks)
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Wireless mesh networks, example
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Wireless mesh networks, example
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Hybrid wireless networks, example
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Issues in ad-hoc wireless networks
Medium access scheme
Routing Multicasting
Transport layer protocol
Pricing scheme
Quality of service provisioning
Self-organization
Energy management
Addressing and service discovery
Scalability
Deployment considerations
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Issues, QoS provisioning
QoS parameters Bandwidth and delay?
Availability? Trustworthy? Link life? Minimum energy consumption?
QoS-aware routing Make use of network
throughput, packet delivery ratio, reliability, delay, jitter, packet loss rate, bit error rate, path loss
QoS frameworks Users served per-
session or per-class
Routing
Signaling
MAC
Connection admission control
Scheduling schemes
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Issues in QoS provision for MANETs
Dynamically varying network topology
Imprecise state information
Lack of central coordination
Error-prone shared radio channel
Hidden terminal problem
Limited resources availability
Insecure medium
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QoS design choices
Hard state vs soft state resource reservation
Stateful vs stateless approach
Hard QoS vs soft QoS approach
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Classification of QoS approaches
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Power Management (p214)
Please see textbook p. 214
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Issues, self-organization
Neighbour discovery beacons, snooping
Topology organization the whole or part
Topology reorganization exchange topological changes and then adapt
network partitioning and merging
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Deployment considerations
Scenario
Longevity
Area of coverage
Service availability
Operational integration with other infrastructure
Choice of protocols: link layer vs transport layer
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