Network Protocols
... More on the Sequence Number • Need a way to recycle sequence numbers – Each TCP packet has a time-to-live field • If the packet is not delivered in X seconds – The packet is dropped – Sequence numbers can be reused ...
... More on the Sequence Number • Need a way to recycle sequence numbers – Each TCP packet has a time-to-live field • If the packet is not delivered in X seconds – The packet is dropped – Sequence numbers can be reused ...
DT3: RF On/Off Remote Control Technology
... and are assigned the values of “0” or “1”. Examples of binary coding for: • Unique codes for different devices • Character strings to bit strings • Security ...
... and are assigned the values of “0” or “1”. Examples of binary coding for: • Unique codes for different devices • Character strings to bit strings • Security ...
chap2-jhchen
... rates depending on the ability of the receiver to discern the difference between 0 and 1 in the presence of noise and other impairments. Conclusions ...
... rates depending on the ability of the receiver to discern the difference between 0 and 1 in the presence of noise and other impairments. Conclusions ...
Technician Study Sheet
... Good Amateur Practices The radio spectrum is a shared resource and the FCC rules are largely based on “play nicely with others”. Good Amateur Practice is exactly that. They include “listen before transmitting” to insure the frequency isn’t already being used. If you want to break into a conversation ...
... Good Amateur Practices The radio spectrum is a shared resource and the FCC rules are largely based on “play nicely with others”. Good Amateur Practice is exactly that. They include “listen before transmitting” to insure the frequency isn’t already being used. If you want to break into a conversation ...
Chapter 13: Wireless Networks
... communication frequencies below1 GHz using no more than 5 MHz of bandwidth and supporting data rates up to 10 kbps Big LEOs: Work at frequencies above 1 GHz and supporting data rates up to a few megabits per second ...
... communication frequencies below1 GHz using no more than 5 MHz of bandwidth and supporting data rates up to 10 kbps Big LEOs: Work at frequencies above 1 GHz and supporting data rates up to a few megabits per second ...
Part II Data Transmission
... element. If 1000 signal elements are sent per second, then baud rate = 1000 bauds per second, bit rate = 1000 * 4 = 4000 bps ...
... element. If 1000 signal elements are sent per second, then baud rate = 1000 bauds per second, bit rate = 1000 * 4 = 4000 bps ...
Data Transmission
... where signal strength falls off with distance depends on medium received signal strength must be: ...
... where signal strength falls off with distance depends on medium received signal strength must be: ...
IMPACT OF INFORMATION & COMMUNICATION TECHNOLOGY …
... An incredible fast progress in information and communication technologies are transforming the information handling and seeking habits of both librarians and users. Inspite of the initiatives taken by INFLIBNET, NISCAIR, NIC and Refreshers courses provided by universities, more such kind of training ...
... An incredible fast progress in information and communication technologies are transforming the information handling and seeking habits of both librarians and users. Inspite of the initiatives taken by INFLIBNET, NISCAIR, NIC and Refreshers courses provided by universities, more such kind of training ...
Network
... Control information is added to user data at each layer Transport layer may fragment user data Each fragment has a transport header added Destination SAP ...
... Control information is added to user data at each layer Transport layer may fragment user data Each fragment has a transport header added Destination SAP ...
Cluster-Based DSRC Architecture for QoS Provisioning over Vehicle
... ECEN 621, Mobile Wireless Networks ...
... ECEN 621, Mobile Wireless Networks ...
EE1100 Basic Electrical Engineering
... Local loop, analog to digital conversion, sampling of speech, compression of speech, echocontrol, blocking and non-blocking switches, application of Erlang-B formula to voice networks, and how to send data thro the (voice-based) telephone network Topic 6 :- Digital communications Analog communicatio ...
... Local loop, analog to digital conversion, sampling of speech, compression of speech, echocontrol, blocking and non-blocking switches, application of Erlang-B formula to voice networks, and how to send data thro the (voice-based) telephone network Topic 6 :- Digital communications Analog communicatio ...
Error Control (Data Link Layer)
... • Service provided to network layer – framing – error control – flow control – medium access (with shared medium) ...
... • Service provided to network layer – framing – error control – flow control – medium access (with shared medium) ...
Communication Channels and Noise
... channel, it is subjected to different types of impairments because of imperfect characteristics of the channel. As a consequence, the received and the transmitted signals are not the same. These impairments introduce random modifications in analog signals leading to distortion. On the other hand ...
... channel, it is subjected to different types of impairments because of imperfect characteristics of the channel. As a consequence, the received and the transmitted signals are not the same. These impairments introduce random modifications in analog signals leading to distortion. On the other hand ...
EET 2351 Lecture 2 - MDC Faculty Home Pages
... The period, T, of the pulse train above is 1ms. It can be measured from rising edge to rising edge, or from falling edge to falling edge. The first pulse occurs from 23.0ms to 23.5ms, so the pulse width, pw or tp, is 0.5ms. The Duty Cycle, D, is defined as the pulse width divided by the period. ...
... The period, T, of the pulse train above is 1ms. It can be measured from rising edge to rising edge, or from falling edge to falling edge. The first pulse occurs from 23.0ms to 23.5ms, so the pulse width, pw or tp, is 0.5ms. The Duty Cycle, D, is defined as the pulse width divided by the period. ...
Chapter 1 Communication Networks and Services
... z ARPANET packet switching network z TCP/IP internet protocols z Ethernet local area network 1980s & 1990s: New applications and Internet growth z Commercialization of Internet z E-mail, file transfer, web, P2P, . . . z Internet traffic surpasses voice traffic ...
... z ARPANET packet switching network z TCP/IP internet protocols z Ethernet local area network 1980s & 1990s: New applications and Internet growth z Commercialization of Internet z E-mail, file transfer, web, P2P, . . . z Internet traffic surpasses voice traffic ...
What is a communication network?
... Analog transmission → digital transmission Mobile communications ...
... Analog transmission → digital transmission Mobile communications ...
Chapter 2 Protocols and Architecture
... Research Project Agency (DARPA) for its packet switched network (ARPANET) Used by the global Internet No official model but a working one! ...
... Research Project Agency (DARPA) for its packet switched network (ARPANET) Used by the global Internet No official model but a working one! ...
class05
... • Any non-periodic function (so frequency f0 0) can be expressed as an integral over frequency of sinusoidal waves having frequencies. The integral is called the Fourier transform of the function, and a plot of amplitude vs. frequency is called the Fourier spectrum of the function. • The Fourier sp ...
... • Any non-periodic function (so frequency f0 0) can be expressed as an integral over frequency of sinusoidal waves having frequencies. The integral is called the Fourier transform of the function, and a plot of amplitude vs. frequency is called the Fourier spectrum of the function. • The Fourier sp ...
Chapter 3 - William Stallings, Data and Computer Communications
... where signal strength falls off with distance depends on medium received signal strength must be: ...
... where signal strength falls off with distance depends on medium received signal strength must be: ...
Class 4 - Sept. 18-19
... • Received signal strength must be: – strong enough to be detected – sufficiently higher than noise to be received without error ...
... • Received signal strength must be: – strong enough to be detected – sufficiently higher than noise to be received without error ...
PowerPoint XP
... Too long unnecessary waiting Too short a message is transmitted when an acknowledgement is in transit ...
... Too long unnecessary waiting Too short a message is transmitted when an acknowledgement is in transit ...
RF and A&M Signal Technologies for Wireless Communications
... and Power Management and Millimeter Wave to be covered by Chandra on 11/30. ...
... and Power Management and Millimeter Wave to be covered by Chandra on 11/30. ...
PowerPoint XP
... More on the Sequence Number • Need a way to recycle sequence numbers – Each TCP packet has a time-to-live field • If the packet is not delivered in X seconds – The packet is dropped – Sequence numbers can be reused ...
... More on the Sequence Number • Need a way to recycle sequence numbers – Each TCP packet has a time-to-live field • If the packet is not delivered in X seconds – The packet is dropped – Sequence numbers can be reused ...
Telecommunication
Telecommunication occurs when the exchange of information between two or more entities (communication) includes the use of technology. Communication technology uses channels to transmit information (as electrical signals), either over a physical medium (such as signal cables), or in the form of electromagnetic waves. The word is often used in its plural form, telecommunications, because it involves many different technologies.Early means of communicating over a distance included visual signals, such as beacons, smoke signals, semaphore telegraphs, signal flags, and optical heliographs. Other examples of pre-modern long-distance communication included audio messages such as coded drumbeats, lung-blown horns, and loud whistles. Modern technologies for long-distance communication usually involve electrical and electromagnetic technologies, such as telegraph, telephone, and teleprinter, networks, radio, microwave transmission, fiber optics, and communications satellites.A revolution in wireless communication began in the first decade of the 20th century with the pioneering developments in radio communications by Guglielmo Marconi, who won the Nobel Prize in Physics in 1909. Other highly notable pioneering inventors and developers in the field of electrical and electronic telecommunications include Charles Wheatstone and Samuel Morse (telegraph), Alexander Graham Bell (telephone), Edwin Armstrong, and Lee de Forest (radio), as well as John Logie Baird and Philo Farnsworth (television).