Network Types
... Frequency: the speed at which a signal changes from high to low. Bandwidth: the range of signal frequencies that can be sent over a given medium at the ...
... Frequency: the speed at which a signal changes from high to low. Bandwidth: the range of signal frequencies that can be sent over a given medium at the ...
Routing in Mobile Ad
... – Assumptions: • nodes equipped with positioning system, say a GPS receiver • nodes capable of multi-level transmission • mobility scenario ...
... – Assumptions: • nodes equipped with positioning system, say a GPS receiver • nodes capable of multi-level transmission • mobility scenario ...
WDRM, 2nd edition - Falcon Electronics
... Telecommunication Union’s (ITU) International Mobile Telecommunications (IMT)-2000 standard. 2G ...
... Telecommunication Union’s (ITU) International Mobile Telecommunications (IMT)-2000 standard. 2G ...
Energy Efficiency Challenges and CR as a Solution
... I ‘J’ can be communication able todevice, autocorrelation function found transmitting RATs ‘E’ and system. Bet there isone aI RAT lot multiple hops) and use this knowledge in at given link capabilities can associate with connect to!near This is with subsystem through of the which am location ‘C’ loo ...
... I ‘J’ can be communication able todevice, autocorrelation function found transmitting RATs ‘E’ and system. Bet there isone aI RAT lot multiple hops) and use this knowledge in at given link capabilities can associate with connect to!near This is with subsystem through of the which am location ‘C’ loo ...
Slide 1
... Total Access Communications System (TACS) was first used in the UK in 1985. It was based on the AMPS technology. 2G Cellular With second-generation networks, or 2G, wireless technology progressed from analog to digital. These networks are still the most prevalent standard in use today. There are thr ...
... Total Access Communications System (TACS) was first used in the UK in 1985. It was based on the AMPS technology. 2G Cellular With second-generation networks, or 2G, wireless technology progressed from analog to digital. These networks are still the most prevalent standard in use today. There are thr ...
Week_Thirteen_ppt
... The first is that higher frequency radio waves are more easily absorbed by obstacles such as walls, making 802.11a susceptible to poor performance due to obstructions. The second is that this higher frequency band has slightly poorer range than either 802.11b or g. Also, some countries, including Ru ...
... The first is that higher frequency radio waves are more easily absorbed by obstacles such as walls, making 802.11a susceptible to poor performance due to obstructions. The second is that this higher frequency band has slightly poorer range than either 802.11b or g. Also, some countries, including Ru ...
Gladiator Startup 1.0
... First and second generation provides connection oriented services to the users A dedicated channel is allocated over the entire duration of the call In the case of voice communication this is “only” 50% wasteful This mode of communication is called “circuit-switching” Circuit switching is ...
... First and second generation provides connection oriented services to the users A dedicated channel is allocated over the entire duration of the call In the case of voice communication this is “only” 50% wasteful This mode of communication is called “circuit-switching” Circuit switching is ...
chapter 10 - School of Electrical and Computer Engineering
... – There are some strict delay variation requirements for the data, which are presented to the user, whereas delay variation is not really a problem with interactive services. – The requirements for maximum delay could be as long as 10 seconds. – The only data traffic in the opposite direction ( usua ...
... – There are some strict delay variation requirements for the data, which are presented to the user, whereas delay variation is not really a problem with interactive services. – The requirements for maximum delay could be as long as 10 seconds. – The only data traffic in the opposite direction ( usua ...
IMT-2000 NW, OSS & Service
... - High Speed Data Services - Point to Multipoint Transmission - Quality of Service - Various Supplementary Services ...
... - High Speed Data Services - Point to Multipoint Transmission - Quality of Service - Various Supplementary Services ...
Chapter 6 slides, Computer Networking, 3rd edition
... run applications may be stationary (non-mobile) or mobile ...
... run applications may be stationary (non-mobile) or mobile ...
Emergency Alert Systems over Cellular Text Messaging Services in
... Recently, the number of accidents of different types (vehicle accidents, fires, etc.) has been increased. Some of these deaths can be attributed to the long response time required to reach an accident. This is due to the fact that the process of determining the location of an accident made by a comm ...
... Recently, the number of accidents of different types (vehicle accidents, fires, etc.) has been increased. Some of these deaths can be attributed to the long response time required to reach an accident. This is due to the fact that the process of determining the location of an accident made by a comm ...
IEEE 802.11 based WLANs
... Supports 1 and 2 Mbps data transport and applies two level - GFSK modulation* (Gaussian Frequency Shift Keying) 79 channels from 2.402 to 2.480 GHz ( in U.S. and most of EU countries) with 1 MHz channel space 78 hopping sequences with minimum 6 MHz hopping space, each sequence uses every 79 frequenc ...
... Supports 1 and 2 Mbps data transport and applies two level - GFSK modulation* (Gaussian Frequency Shift Keying) 79 channels from 2.402 to 2.480 GHz ( in U.S. and most of EU countries) with 1 MHz channel space 78 hopping sequences with minimum 6 MHz hopping space, each sequence uses every 79 frequenc ...
IEEE 802.11 based WLANs
... NOTE: This frame structure is common for all data send by a 802.11 station control info (WEP, data type as management, control, data ...) ...
... NOTE: This frame structure is common for all data send by a 802.11 station control info (WEP, data type as management, control, data ...) ...
wlan
... IEEE 802.11b (also called WiFi):- Operates in unlicensed 2.4GHz band, supports up to 11Mbps (Oddly enough, the latter came before the former) ...
... IEEE 802.11b (also called WiFi):- Operates in unlicensed 2.4GHz band, supports up to 11Mbps (Oddly enough, the latter came before the former) ...
Part I: Introduction
... P(success by given node) = P(node transmits) . P(no other node transmits in [t0-1,t0] . P(no other node transmits in [t0,t0+1] ...
... P(success by given node) = P(node transmits) . P(no other node transmits in [t0-1,t0] . P(no other node transmits in [t0,t0+1] ...
Wireless Communications
... designed so as to easily fit and co-exist with the Broadband ISDN (Integrated Services Digital Network). • In order to avoid a serious mismatch between wireline and wireless networks, it is now timely to begin consideration of broadband wireless networks with similar service capabilities ...
... designed so as to easily fit and co-exist with the Broadband ISDN (Integrated Services Digital Network). • In order to avoid a serious mismatch between wireline and wireless networks, it is now timely to begin consideration of broadband wireless networks with similar service capabilities ...
4.5G, Opening Giga Mobile World, Empowering Vertical
... inter-cell high-speed interfaces. It allows multiple antennas to be used for a single UE. It helps networks to evolve from the legacy cell-centric network architecture to a user-centric network architecture. For example, this technology can combine eight 2T2R cells into one 16T16R cell, evaluate the ...
... inter-cell high-speed interfaces. It allows multiple antennas to be used for a single UE. It helps networks to evolve from the legacy cell-centric network architecture to a user-centric network architecture. For example, this technology can combine eight 2T2R cells into one 16T16R cell, evaluate the ...
Parts of Communication System Channel
... • Electronic Communication System- defined as the whole mechanism of sending and receiving as well as processing of information electronically from source to destination; • Communication System- to produce an accurate replica of the transmitted information that is to transfer information between two ...
... • Electronic Communication System- defined as the whole mechanism of sending and receiving as well as processing of information electronically from source to destination; • Communication System- to produce an accurate replica of the transmitted information that is to transfer information between two ...
CSC 335 Data Communications and Networking I
... checks the CRC to verify that no bits were lost or corrupted, extracts the datagram, and passes it to IP. ...
... checks the CRC to verify that no bits were lost or corrupted, extracts the datagram, and passes it to IP. ...
Chapter6
... decreased signal strength: radio signal attenuates as it propagates through matter (path loss) interference from other sources: standardized wireless network frequencies (e.g., 2.4 GHz) shared by other devices (e.g., phone); devices (motors) interfere as well multipath propagation: radio signal refl ...
... decreased signal strength: radio signal attenuates as it propagates through matter (path loss) interference from other sources: standardized wireless network frequencies (e.g., 2.4 GHz) shared by other devices (e.g., phone); devices (motors) interfere as well multipath propagation: radio signal refl ...
Netronics NetPoint Pro Brochure LR
... link between the low power client transmitter and the base station receiver). NetPoint Pro utilizes its beam forming technology to improve the radio link budget in up link to make it possible to have long range and wide coverage as well as high capacity, even when the client device is a low power la ...
... link between the low power client transmitter and the base station receiver). NetPoint Pro utilizes its beam forming technology to improve the radio link budget in up link to make it possible to have long range and wide coverage as well as high capacity, even when the client device is a low power la ...
Notes chapter 6
... unique “code” assigned to each user; i.e., code set partitioning all users share same frequency, but each user has own “chipping” sequence (i.e., code) to encode data encoded signal = (original data) X (chipping sequence) decoding: inner-product of encoded signal and chipping sequence allows multipl ...
... unique “code” assigned to each user; i.e., code set partitioning all users share same frequency, but each user has own “chipping” sequence (i.e., code) to encode data encoded signal = (original data) X (chipping sequence) decoding: inner-product of encoded signal and chipping sequence allows multipl ...
Cellular network
A cellular network or mobile network is a communications network where the last link is wireless. The network is distributed over land areas called cells, each served by at least one fixed-location transceiver, known as a cell site or base station. In a cellular network, each cell uses a different set of frequencies from neighboring cells, to avoid interference and provide guaranteed bandwidth within each cell.When joined together these cells provide radio coverage over a wide geographic area. This enables a large number of portable transceivers (e.g., mobile phones, pagers, etc.) to communicate with each other and with fixed transceivers and telephones anywhere in the network, via base stations, even if some of the transceivers are moving through more than one cell during transmission.Cellular networks offer a number of desirable features: More capacity than a single large transmitter, since the same frequency can be used for multiple links as long as they are in different cells Mobile devices use less power than with a single transmitter or satellite since the cell towers are closer Larger coverage area than a single terrestrial transmitter, since additional cell towers can be added indefinitely and are not limited by the horizonMajor telecommunications providers have deployed voice and data cellular networks over most of the inhabited land area of the Earth. This allows mobile phones and mobile computing devices to be connected to the public switched telephone network and public Internet. Private cellular networks can be used for research or for large organizations and fleets, such as dispatch for local public safety agencies or a taxicab company.