selected topic2
Post on 09-Nov-2015
225 Views
Preview:
DESCRIPTION
TRANSCRIPT
-
1 Selected Topics in Telecommunication Engineering I
504460
15 2558 .
-
State of the Art
2
-
3
-
(Radio Transmission)
( Band pass channel)
Voice Data
link
() (156-162 MHz) link
4
-
(Microwave Transmission)
SNR
5
-
(Infrared and Millimeter
Waves)
6
-
(Lightwave Transmission)
link
license
7
-
8
-
WLANs
(PANs)
9
-
Reuse channels
()
Base stations/Mobile Telephone Switching Offices (MTSOs) handoff
10
link
-
WLANs!
!
WLANs 100
11
-
one way communication (TV, GPS)
base station
Iridium, Globalstar, Inmarsat12
-
(PANs) Bluetooth
RF ()
(10 )
2.4 GHz band
1 Data (700 kbps) and 3
1 Mbps data rate 7
TDD duplex
Polling based multiple access
13
-
1. Ad hoc network
2. Wireless Sensor Networks
3. Distributed Control Network
4. Ultra Wide Band (UWB) systems
14
-
1. Ad hoc
15
-
1. Ad hoc Peer to peer communications
No backbone infrastructure
Routing can be multihop
Topology is dynamic
Fully connected with different link SINRs16
-
1. Ad-Hoc networks Adhoc networks Provide a flexible network infrastructure for many
emerging applications
The capacity of such network is generally unknown
Transmission, access and routing strategies for these networks are generally ad-hoc
Crosslayer design critical and very challenging
Energy constraints impose interesting design tradeoffs for communication and networking
17
-
2. Wireless Sensor Networks
18
-
Wireless Sensor network
19
-
2. Wireless Sensor Network Nodes powered by non-rechargeable batteries
Data flows to centralized location
Low per-node rated but up to 100,000 nodes
Data highly correlated in time and space
Nodes can cooperate in transmission, reception, compression and signal processing
20
-
3. Distributed Control Network DCS(Distributed Control System) (Control) (monitor)
packet loss delay time
21
link
-
22
3. Distributed Control Network link
-
23
3. Distributed Control Network
-
4. Ultra Wide Band Systems UWB 100 Mb/s (Up to 1000 Mb/s)
UWB ultra-low power radio signal with very narrow pulses (nanosecond)
UWB
license
24
-
4. UWB
25
-
26
-
27
top related