15-441: Networking Virtual Circuits, ATM, MPLS Peter Steenkiste Carnegie Mellon University
... – SVCs are more like a phone call » PVCs administratively configured (but not “manually”) » SVCs dynamically set up on a “per-call” basis ...
... – SVCs are more like a phone call » PVCs administratively configured (but not “manually”) » SVCs dynamically set up on a “per-call” basis ...
ATM - La Salle University
... • You may have noticed in another homework that some of the ASCII characters are used in “handshaking” as well. – (software connection) ...
... • You may have noticed in another homework that some of the ASCII characters are used in “handshaking” as well. – (software connection) ...
New high-quality voice service for mobile networks
... to the PSTN. A similar mechanism exists in the TFO protocol. The introduction of AMR-WB into GSM systems requires TFO, which is part of GERAN. The introduction does not require substantial modification of the core network; it affects only minor parts of the transport plane. AMR-WB and TFO can also ...
... to the PSTN. A similar mechanism exists in the TFO protocol. The introduction of AMR-WB into GSM systems requires TFO, which is part of GERAN. The introduction does not require substantial modification of the core network; it affects only minor parts of the transport plane. AMR-WB and TFO can also ...
Out-of-band Signalling Channel for Efficient Multicast Service Delivery in
... Analysing the signalling application scenarios, following important observation has been made: In many cases the control signalling targets a group of users with common context e.g. all receivers in a certain area/cells of a network or all receivers currently receiving a flow with the same quality o ...
... Analysing the signalling application scenarios, following important observation has been made: In many cases the control signalling targets a group of users with common context e.g. all receivers in a certain area/cells of a network or all receivers currently receiving a flow with the same quality o ...
AER Auditory Filtering and CPG for Robot Control
... Additional handshaking lines (Acknowledge and Request) are used for completing the asynchronous communication. The inter-chip AER bus operates at the maximum possible speed. In the receiver chip the pulses are directed to the cells corresponding to the address on the bus. In this way, cells with the ...
... Additional handshaking lines (Acknowledge and Request) are used for completing the asynchronous communication. The inter-chip AER bus operates at the maximum possible speed. In the receiver chip the pulses are directed to the cells corresponding to the address on the bus. In this way, cells with the ...
FS3610481053
... sufficiently), seamless handoff is possible. Figure 1(b) shows that there are situations where a handoff is possible, but not desirable. ECS proactively initiates a handoff every time a new network prefix is learned in a router advertisement. Conversely, LCS acts reactively by not initiating a hando ...
... sufficiently), seamless handoff is possible. Figure 1(b) shows that there are situations where a handoff is possible, but not desirable. ECS proactively initiates a handoff every time a new network prefix is learned in a router advertisement. Conversely, LCS acts reactively by not initiating a hando ...
A Frequency Quadrupling Optical mm-Wave Generation
... Millimeter-wave (mm-wave) signals have extensive applications [6], including radars, remote sensing, broadband wireless communication and so on. Especially, the unlicensed 60GHz frequency band (57-64 GHz) is significant for high-speed applications [7]. However, mm-wave distribution via wireless or c ...
... Millimeter-wave (mm-wave) signals have extensive applications [6], including radars, remote sensing, broadband wireless communication and so on. Especially, the unlicensed 60GHz frequency band (57-64 GHz) is significant for high-speed applications [7]. However, mm-wave distribution via wireless or c ...
LTE Multimedia Broadcast Multicast Services (MBMS)
... LTE is the technology of choice for mobile operators because it delivers significantly higher bandwidth with the lowest amount of spectral resources. Data was the initial service supported by LTE networks. By shifting data services from 3G networks to LTE, mobile operators could release 3G resources ...
... LTE is the technology of choice for mobile operators because it delivers significantly higher bandwidth with the lowest amount of spectral resources. Data was the initial service supported by LTE networks. By shifting data services from 3G networks to LTE, mobile operators could release 3G resources ...
networks
... Reliability of Wires Transmission • bit error rate (BER) of wireless link determined by received signal power, noise due to interference caused by the receiver hardware, interference from other sources, and characteristics of the channel – Path loss: power to overcome interference – Shadow fading: ...
... Reliability of Wires Transmission • bit error rate (BER) of wireless link determined by received signal power, noise due to interference caused by the receiver hardware, interference from other sources, and characteristics of the channel – Path loss: power to overcome interference – Shadow fading: ...
Introduction
... In order to filter or selectively deliver network traffic, bridges build tables of all MAC addresses located on a network and other networks and map them. — If data comes along the network media, a bridge compares the destination MAC address carried by the data to MAC addresses contained in its tabl ...
... In order to filter or selectively deliver network traffic, bridges build tables of all MAC addresses located on a network and other networks and map them. — If data comes along the network media, a bridge compares the destination MAC address carried by the data to MAC addresses contained in its tabl ...
Introduction to mobile WiMAX
... signals to improve coverage and capacity of the system and reduce outage probability. y Space-Time Coding (STC; open-loop): Transmit diversity techniques such as Alamouti scheme is supported to provide spatial diversity and to reduce fade margin. y Spatial Multiplexing (SM; open-loop): to take advan ...
... signals to improve coverage and capacity of the system and reduce outage probability. y Space-Time Coding (STC; open-loop): Transmit diversity techniques such as Alamouti scheme is supported to provide spatial diversity and to reduce fade margin. y Spatial Multiplexing (SM; open-loop): to take advan ...
Multiple Fundamental Frequency Pitch Detection for Real Time MIDI
... Figure 2.2: Frequency Spectrum of total frequency range of FFT output (blue) and reduced frequency output (red) for upper bound of target F0 frequencies (~517 Hz) .................................................................................. 29 Figure 2.3: Frequency Spectrum of total frequency r ...
... Figure 2.2: Frequency Spectrum of total frequency range of FFT output (blue) and reduced frequency output (red) for upper bound of target F0 frequencies (~517 Hz) .................................................................................. 29 Figure 2.3: Frequency Spectrum of total frequency r ...
GPRS - School of Electrical and Computer Engineering at Georgia
... There are a few new network entities called GPRS Support Nodes (GSN) – Responsible for delivery and routing of data packets between the mobile terminals and the external packet network. Two types of GSN: – Serving GPRS Support Node (SGSN): Router similar to the foreign agent in Mobile IP. It ...
... There are a few new network entities called GPRS Support Nodes (GSN) – Responsible for delivery and routing of data packets between the mobile terminals and the external packet network. Two types of GSN: – Serving GPRS Support Node (SGSN): Router similar to the foreign agent in Mobile IP. It ...
C THE GRIDES (GSM-R INTEGRITY DETECTION LINE Authors
... This raises the need by the Manager of the railway infrastructure, in order to ensure an adequate and available service on the HS/AC, to detect any possible interference and to classify its type (see table 1). ...
... This raises the need by the Manager of the railway infrastructure, in order to ensure an adequate and available service on the HS/AC, to detect any possible interference and to classify its type (see table 1). ...
Vertical handover criteria and algorithm in IEEE 802.11 and 802.16
... analyzing connection performance and taking handover decisions. The measurement of these parameters is required to satisfy the following properties: i) it should be periodical, in order to continuously monitor the access network condition; ii) it can take place without sending and receiving any data ...
... analyzing connection performance and taking handover decisions. The measurement of these parameters is required to satisfy the following properties: i) it should be periodical, in order to continuously monitor the access network condition; ii) it can take place without sending and receiving any data ...
Lecture-01: Course Introduction - University of Colorado Boulder
... – Creates the problem of multipath fading – Signals add together to degrade the final signal ...
... – Creates the problem of multipath fading – Signals add together to degrade the final signal ...
Mobile Commerce: The Business of Time
... Omnidirectional Transceiver A few thousands of km or miles (Low Earth Orbit) or tens of thousands of km (miles) (Medium Earth Orbit) Closer than GEO, so omnidirectional transceivers can be used User is served by a succession of satellites © 2007 Prentice-Hall, Inc ...
... Omnidirectional Transceiver A few thousands of km or miles (Low Earth Orbit) or tens of thousands of km (miles) (Medium Earth Orbit) Closer than GEO, so omnidirectional transceivers can be used User is served by a succession of satellites © 2007 Prentice-Hall, Inc ...
SDN in Wireless Cellular Networks: White Paper Technology Business Unit
... The phenomenal growth in traffic from mobile devices poses new challenges for service providers (SPs) and network operators in meeting customer needs, without compromising the bottom line. The obvious but costly solution to increased bandwidth demand would be to increase the link capacity. However, ...
... The phenomenal growth in traffic from mobile devices poses new challenges for service providers (SPs) and network operators in meeting customer needs, without compromising the bottom line. The obvious but costly solution to increased bandwidth demand would be to increase the link capacity. However, ...
Lecture 9 – Mobility Management and Mobile Application Part (MAP)
... GSM mobility solution for packet services Background on IP networks There are differences in requirements for mobility management in circuit and packet networks. Let us first give some background on IP networks that in practice are the target networks for packet services in GSM. In IP networks, netw ...
... GSM mobility solution for packet services Background on IP networks There are differences in requirements for mobility management in circuit and packet networks. Let us first give some background on IP networks that in practice are the target networks for packet services in GSM. In IP networks, netw ...
Lecture-13: LTE Architecture - University of Colorado Boulder
... downlink-to-uplink – Downlink Pilot TimeSlot (DwPTS): Ordinary but shorter downlink subframe of 3 to 12 OFDM symbols – Uplink Pilot TimeSlot (UpPTS): Short duration of one or two OFDM symbols for sounding reference signals ...
... downlink-to-uplink – Downlink Pilot TimeSlot (DwPTS): Ordinary but shorter downlink subframe of 3 to 12 OFDM symbols – Uplink Pilot TimeSlot (UpPTS): Short duration of one or two OFDM symbols for sounding reference signals ...
CS1391722
... One of the major design issues in heterogeneous wireless networks is the support of vertical handover. Vertical handover occurs when a mobile terminal switches from one network to another (e.g., from WLAN to CDMA 1xRTT). Seamless handover between different access technologies is a great challenge as ...
... One of the major design issues in heterogeneous wireless networks is the support of vertical handover. Vertical handover occurs when a mobile terminal switches from one network to another (e.g., from WLAN to CDMA 1xRTT). Seamless handover between different access technologies is a great challenge as ...
LTE Radio Planning
... HSDPA end-user traffic may derive from only one cell carrier at a time. Notwithstanding, in Ericsson’s implementation, the associated signaling channels in both the uplink and downlink can be connected to different sectors of the same site (softer handover) and to sectors of different sites (soft ha ...
... HSDPA end-user traffic may derive from only one cell carrier at a time. Notwithstanding, in Ericsson’s implementation, the associated signaling channels in both the uplink and downlink can be connected to different sectors of the same site (softer handover) and to sectors of different sites (soft ha ...
Frequency Modulation
... Broadband transmission = • In general, broadband refers to telecommunication in which a wide band of frequencies is available to transmit information. • Because a wide band of frequencies is available, information can be multiplexed and sent on many different frequencies or channels within the band ...
... Broadband transmission = • In general, broadband refers to telecommunication in which a wide band of frequencies is available to transmit information. • Because a wide band of frequencies is available, information can be multiplexed and sent on many different frequencies or channels within the band ...
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.