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 ...
IOSR Journal of Electronics and Communication Engineering (IOSR-JECE)
... The next generation heterogonous wireless network (HWN) consists of various wireless technologies including UMTS and WLAN. Smooth mobility is expected to be the most significant feature for future HWNs. To achieve smooth mobility, especially for a seamless vertical handover (VHO) in wireless communi ...
... The next generation heterogonous wireless network (HWN) consists of various wireless technologies including UMTS and WLAN. Smooth mobility is expected to be the most significant feature for future HWNs. To achieve smooth mobility, especially for a seamless vertical handover (VHO) in wireless communi ...
PPT
... • At one point, ATM was viewed as a replacement for IP. • Could carry both traditional telephone traffic (CBR circuits) and other traffic (data, VBR) • Better than IP, since it supports QoS • Complex technology. • Switching core is fairly simple, but • Support for different traffic classes • Signali ...
... • At one point, ATM was viewed as a replacement for IP. • Could carry both traditional telephone traffic (CBR circuits) and other traffic (data, VBR) • Better than IP, since it supports QoS • Complex technology. • Switching core is fairly simple, but • Support for different traffic classes • Signali ...
3G Tutorial - Dialogic | Diameter, WebRTC, BorderNet SBC
... (*) or TDM-based core network (**) or 7 bits if Half-Rate coder is used www.nmscommunications.com ...
... (*) or TDM-based core network (**) or 7 bits if Half-Rate coder is used www.nmscommunications.com ...
Document
... Work with high data rate by using the features [large bandwidth, less susceptible to noise] of optical fiber. Interact with existing systems and provide interconnections without lowering their effectiveness or requiring their replacement. Cost effective. Able to work with and support existing teleco ...
... Work with high data rate by using the features [large bandwidth, less susceptible to noise] of optical fiber. Interact with existing systems and provide interconnections without lowering their effectiveness or requiring their replacement. Cost effective. Able to work with and support existing teleco ...
Lecture-02: Signals fundamentals
... • Very high signal attenuation (degradation) • Transmission is very noisy; subject to high BER • Broadcast channel is inherently insecure; no physical security to prevent spoofing • Wireless channel is not necessarily symmetric and are not transitive – Remember the physical channel is symmetric – Bu ...
... • Very high signal attenuation (degradation) • Transmission is very noisy; subject to high BER • Broadcast channel is inherently insecure; no physical security to prevent spoofing • Wireless channel is not necessarily symmetric and are not transitive – Remember the physical channel is symmetric – Bu ...
Isolated WiFi Environments Jacob Carlsson LiU-ITN-TEK-A-15/003-SE 2015-02-04
... WiFi is a wireless network that is certified by the WiFi Alliance and based on the IEEE 802.11 standards [3]. Figure 2.2 shows the Wi-Fi certified logo that only products that pass the Wi-Fi Alliance® certification process can bear. The original version of IEEE 802.11 was released in 1997 and the curre ...
... WiFi is a wireless network that is certified by the WiFi Alliance and based on the IEEE 802.11 standards [3]. Figure 2.2 shows the Wi-Fi certified logo that only products that pass the Wi-Fi Alliance® certification process can bear. The original version of IEEE 802.11 was released in 1997 and the curre ...
Australian Journal of Basic and Applied Sciences Reducing Overall
... bandwidth (AUB), available downlink (DL) bandwidth (ADB), UL packet delay (UPD) and DL packet delay (DPD), along with DCD and UCD over the backbone to the nearby BSs periodically. A handoff decision module (HDM) is installed in MSs that works at MAC layer. During the application establishment, the H ...
... bandwidth (AUB), available downlink (DL) bandwidth (ADB), UL packet delay (UPD) and DL packet delay (DPD), along with DCD and UCD over the backbone to the nearby BSs periodically. A handoff decision module (HDM) is installed in MSs that works at MAC layer. During the application establishment, the H ...
Tuesday, March 20, 2007 (Circuits, Virtual
... – E.g., connect two bank locations with a PVC that looks like a circuit – SVCs are more like a phone call PVCs administratively configured (but not “manually”) SVCs dynamically set up on a “per-call” basis point to point point to multipoint ...
... – E.g., connect two bank locations with a PVC that looks like a circuit – SVCs are more like a phone call PVCs administratively configured (but not “manually”) SVCs dynamically set up on a “per-call” basis point to point point to multipoint ...
Sistemi e Reti Wireless - Dipartimento di Informatica
... • newer solutions support ATM, FireWire, PPP... …with other Wireless infrastructures: • several types of interoperability are possible • the role of Standard definitions is to allow compliant products to interoperate • interference is possible in co-located solutions • security achieved through en ...
... • newer solutions support ATM, FireWire, PPP... …with other Wireless infrastructures: • several types of interoperability are possible • the role of Standard definitions is to allow compliant products to interoperate • interference is possible in co-located solutions • security achieved through en ...
Information Services and Access Mechanism of Mobile Web
... • The motorist sends an SMS with the machine’s unique code to 7275 (PARK). • The machine vends a ‘pay and display’ ticket and the motorist displays the ticket in the car as normal. • The motorist receives an SMS confirming receipt of funds from their Vodafone ...
... • The motorist sends an SMS with the machine’s unique code to 7275 (PARK). • The machine vends a ‘pay and display’ ticket and the motorist displays the ticket in the car as normal. • The motorist receives an SMS confirming receipt of funds from their Vodafone ...
Broadband Wireless Access WISP Cookbook June 2003
... This document is aimed to satisfy the needs of the Internet Service Providers industry for comprehensive information on Broadband Wireless Access (BWA). It is intended for ISPs who are looking at BWA as an alternative to traditional wire- or cable-based services, including: a. An established ISP tha ...
... This document is aimed to satisfy the needs of the Internet Service Providers industry for comprehensive information on Broadband Wireless Access (BWA). It is intended for ISPs who are looking at BWA as an alternative to traditional wire- or cable-based services, including: a. An established ISP tha ...
2. Advantages of Wireless LANs
... frequency bands can cover this seven-cell region. If frequency reuse were not employed and a single frequency band served all users in the same region, a total of 7-B bandwidth would be needed to support the same quality of service. As a result of frequency reuse, the total available communication ...
... frequency bands can cover this seven-cell region. If frequency reuse were not employed and a single frequency band served all users in the same region, a total of 7-B bandwidth would be needed to support the same quality of service. As a result of frequency reuse, the total available communication ...
An Overview of the MEF
... • The time error should be less than 3μs: due to that it is a common practice to equip CDMA base stations with GPS receivers ...
... • The time error should be less than 3μs: due to that it is a common practice to equip CDMA base stations with GPS receivers ...
trial_lecture
... • Primarily used in FDMA and TDMA systems (e.g. GSM) – Different frequency ranges used in adjacent cells to minimize the interference ...
... • Primarily used in FDMA and TDMA systems (e.g. GSM) – Different frequency ranges used in adjacent cells to minimize the interference ...
MPEG-4 Performance Analysis for a CDMA Network-on-Chip
... blocks, and this can become a performance bottleneck. A busbased interconnect scheme is a shared medium which does not scale well to large systems requiring very high aggregate bandwidth. Networks-on-chip have been proposed as a way to overcome this limitation and provide a scalable interconnect env ...
... blocks, and this can become a performance bottleneck. A busbased interconnect scheme is a shared medium which does not scale well to large systems requiring very high aggregate bandwidth. Networks-on-chip have been proposed as a way to overcome this limitation and provide a scalable interconnect env ...
ECE544Lec3_15
... • meeting timing/quality of service (QoS) requirements of voice, video (versus Internet best-effort model) • “next generation” telephony: technical roots in telephone world • packet-switching (fixed length packets, called “cells”) using virtual circuits ...
... • meeting timing/quality of service (QoS) requirements of voice, video (versus Internet best-effort model) • “next generation” telephony: technical roots in telephone world • packet-switching (fixed length packets, called “cells”) using virtual circuits ...
Spectrum Management Fundamentals
... just considered, then the notches in the channel’s frequency response will be broader, affecting many adjacent carriers. This means that the coded data we transmit should not simply be assigned to the OFDM carriers in a sequential order, since at the receiver this would cause the Viterbi soft-deci ...
... just considered, then the notches in the channel’s frequency response will be broader, affecting many adjacent carriers. This means that the coded data we transmit should not simply be assigned to the OFDM carriers in a sequential order, since at the receiver this would cause the Viterbi soft-deci ...
Lawful Interception Offering
... Supports Video retrieval from the following networks: Mobile – Video retrieval from 3G-324M stream PSTN – Video retrieval from H.324 stream IP – Video retrieval from IP Video stream ...
... Supports Video retrieval from the following networks: Mobile – Video retrieval from 3G-324M stream PSTN – Video retrieval from H.324 stream IP – Video retrieval from IP Video stream ...
... cellular mobile communication network. In 1983, it was put into service at Chicago for the first time, and applied to Washington in December of the same year. Later, the service area expanded gradually in the USA. Till March of 1985, it expanded to 47 regions covering 100,000 users. Other industrial ...
TETRA: Technical Discussion
... users who need fast one-to-one and one-to-many radio communication using voice and data in their daily work. First standard published in 1995. The ETSI TETRA standard was introduced as the first truly open system standard for digital PMR. Uses a digital technology (TDMA) to provide 4 time slots insi ...
... users who need fast one-to-one and one-to-many radio communication using voice and data in their daily work. First standard published in 1995. The ETSI TETRA standard was introduced as the first truly open system standard for digital PMR. Uses a digital technology (TDMA) to provide 4 time slots insi ...
I R T R ECHNICAL
... access points to be mobile/wireless routers with broadband connection to the infrastructure network, then our assumption becomes more sound. Although we do not have a control over the location of the access points, we will have control over their population: We require the number of ad hoc nodes per ...
... access points to be mobile/wireless routers with broadband connection to the infrastructure network, then our assumption becomes more sound. Although we do not have a control over the location of the access points, we will have control over their population: We require the number of ad hoc nodes per ...
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.