O4102103111
... such applications must operate on limited power supplies like batteries for extended lifetime up to years. Therefore, a fundamental challenge for these WSNs is to support high-bandwidth data collection with minimum network energy consumption. Several recent works have exploited the use of WSNs in da ...
... such applications must operate on limited power supplies like batteries for extended lifetime up to years. Therefore, a fundamental challenge for these WSNs is to support high-bandwidth data collection with minimum network energy consumption. Several recent works have exploited the use of WSNs in da ...
Wireless and Mobile Networks Part II
... access of data frames: avoid collisions of long data frames sender first transmits small request-to-send (RTS) packets to BS using CSMA RTSs may still collide with each other (but they’re short) BS broadcasts clear-to-send (CTS) in response to RTS ...
... access of data frames: avoid collisions of long data frames sender first transmits small request-to-send (RTS) packets to BS using CSMA RTSs may still collide with each other (but they’re short) BS broadcasts clear-to-send (CTS) in response to RTS ...
Chapter 6 slides, Computer Networking, 3rd edition
... 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 ...
presentation - NORDUnet Networking Conferences
... VoD, News on Demand, Music On Demand 26.8.2003, Josef Noll ...
... VoD, News on Demand, Music On Demand 26.8.2003, Josef Noll ...
Static Analysis:
... A single load cell will be used to determine the weight resting on the platform, since this component is particularly expensive, although a design featuring four load cells at the corners would be more stable and accurate. The corners of the platform will be supported by springs or another elastic e ...
... A single load cell will be used to determine the weight resting on the platform, since this component is particularly expensive, although a design featuring four load cells at the corners would be more stable and accurate. The corners of the platform will be supported by springs or another elastic e ...
Why Study Computers?
... into a broadband-paced link that allows e-mail addresses to be exchanged through a simple handshake, a report said Monday. The technology, developed by Nippon Telegraph and Telephone Corp. and its subsidiary NTT DoCoMo Inc., uses the body's conductivity and adds the smarts of a personal digital assi ...
... into a broadband-paced link that allows e-mail addresses to be exchanged through a simple handshake, a report said Monday. The technology, developed by Nippon Telegraph and Telephone Corp. and its subsidiary NTT DoCoMo Inc., uses the body's conductivity and adds the smarts of a personal digital assi ...
R. Bruno, M. Conti, E. Gregori, “Traffic Integration in Personal, Local
... system administrator who manually configures the client devices. For dynamic ad hoc networks, this static configuration is not adequate. The SDP protocol is used to find the type of services that are available in the network. Finally, RFCOMM is a serial line emulation protocol, i.e., a cable replace ...
... system administrator who manually configures the client devices. For dynamic ad hoc networks, this static configuration is not adequate. The SDP protocol is used to find the type of services that are available in the network. Finally, RFCOMM is a serial line emulation protocol, i.e., a cable replace ...
Introduction to Wireless Technology
... communication over airwaves. It is currently moving from a generation dominated by analog cellular (1G) through one featuring low-speed digital cellular (2G), and looks to a future of high speed digital cellular (3G). ...
... communication over airwaves. It is currently moving from a generation dominated by analog cellular (1G) through one featuring low-speed digital cellular (2G), and looks to a future of high speed digital cellular (3G). ...
MultiTech Systems
... • Networking existing phone systems over data networks – Eliminate long distance cost to intra-office voice communication – Eliminate tie lines – Network dissimilar PBX’s – Easy ROI calculations ...
... • Networking existing phone systems over data networks – Eliminate long distance cost to intra-office voice communication – Eliminate tie lines – Network dissimilar PBX’s – Easy ROI calculations ...
$doc.title
... No base station exists, and some nodes must relay through others (e.g., mobile ad hoc networks, like vehicular ad hoc networks) ...
... No base station exists, and some nodes must relay through others (e.g., mobile ad hoc networks, like vehicular ad hoc networks) ...
行動多媒體通訊標準參考模式(Reference Models)
... – Macromobility refers to user mobility that is infrequent and also spans considerable space, often between several administrative domain. ...
... – Macromobility refers to user mobility that is infrequent and also spans considerable space, often between several administrative domain. ...
5. Fixed and mobile convergence
... networks. It is concerned with the development of converged network capabilities and supporting standards. This set of standards may be used to offer a set of consistent services via fixed or mobile access to fixed or mobile, public or private networks. An important feature of FMC is to allow users ...
... networks. It is concerned with the development of converged network capabilities and supporting standards. This set of standards may be used to offer a set of consistent services via fixed or mobile access to fixed or mobile, public or private networks. An important feature of FMC is to allow users ...
PPT_692430028
... – The WISP may partake in revenue sharing with the cellular operator, based on the particular roaming agreements between the two parties. ...
... – The WISP may partake in revenue sharing with the cellular operator, based on the particular roaming agreements between the two parties. ...
3rdEditionChapter6
... access of data frames: avoid collisions of long data frames sender first transmits small request-to-send (RTS) packets to BS using CSMA RTSs may still collide with each other (but they’re short) BS broadcasts clear-to-send CTS in response to RTS ...
... access of data frames: avoid collisions of long data frames sender first transmits small request-to-send (RTS) packets to BS using CSMA RTSs may still collide with each other (but they’re short) BS broadcasts clear-to-send CTS in response to RTS ...
Slide 1
... To prevent jamming and interference in military applications What is jamming? To send noise like signals to distort information signals Need to know the frequency of the information signal ...
... To prevent jamming and interference in military applications What is jamming? To send noise like signals to distort information signals Need to know the frequency of the information signal ...
An Investigation into Signal Strength of 802.11n WLAN
... increasing bandwidth and date rate requirements but also provide efficient wireless transmission between the communicating devices. This quest for more efficient communication has prompted the need for a deeper understanding of the wireless channels upon which these devices communicate (Liechty, 20 ...
... increasing bandwidth and date rate requirements but also provide efficient wireless transmission between the communicating devices. This quest for more efficient communication has prompted the need for a deeper understanding of the wireless channels upon which these devices communicate (Liechty, 20 ...
ppt
... • Relay responsible for sending packets between wired network and wireless host(s) in its “area” • E.g., cell towers, 802.11 access points ...
... • Relay responsible for sending packets between wired network and wireless host(s) in its “area” • E.g., cell towers, 802.11 access points ...
Lecture (MAC)
... (aka “cell”) in infrastructure mode contains: ❍ wireless hosts ❍ access point (AP): base station ❍ ad hoc mode: hosts only ...
... (aka “cell”) in infrastructure mode contains: ❍ wireless hosts ❍ access point (AP): base station ❍ ad hoc mode: hosts only ...
PDF Download(PDF Type,777kbytes)
... In conventional access networks, the central office equipment (OLT) is located at access central offices close to subscribers’ homes. EλAN, on the other hand, transfers the OLT to a metro central office that aggregates the traffic of metro networks, as shown in Fig.1. Moreover, EλAN improves the rel ...
... In conventional access networks, the central office equipment (OLT) is located at access central offices close to subscribers’ homes. EλAN, on the other hand, transfers the OLT to a metro central office that aggregates the traffic of metro networks, as shown in Fig.1. Moreover, EλAN improves the rel ...
HPNA 2.0 10 Mbps Home Phoneline Networking
... highly variable, especially at higher frequencies; telephone instruments on the same wiring present a wide range of frequency-dependent impedances; While HPNA 1.0 uses Pulse Position Modulation as mentioned above, HPNA 2.0 uses quadrature amplitude modulation, both to get more throughput in the same ...
... highly variable, especially at higher frequencies; telephone instruments on the same wiring present a wide range of frequency-dependent impedances; While HPNA 1.0 uses Pulse Position Modulation as mentioned above, HPNA 2.0 uses quadrature amplitude modulation, both to get more throughput in the same ...
IT1402 - Mobile Computing
... //(AU NOV-DEC 2007) Page no: 348-350. 2.What are the two problems in Dynamic Source Routing, explain with an example. //(AU NOV-DEC 2005) Page no: 356-358. 3.Discuss in detail about IP packet delivery and agent discovery. Page no: 329-332. 4.Explain about tunneling and encapsulation. //(AU NOV-DEC 2 ...
... //(AU NOV-DEC 2007) Page no: 348-350. 2.What are the two problems in Dynamic Source Routing, explain with an example. //(AU NOV-DEC 2005) Page no: 356-358. 3.Discuss in detail about IP packet delivery and agent discovery. Page no: 329-332. 4.Explain about tunneling and encapsulation. //(AU NOV-DEC 2 ...
Analytical Analysis Of Implementation Issues And Its Practical
... networks (SFN) or multi frequency networks (MFN) and both these networks are ideal for meeting the practical requirements either in local and global services. Another important drawback in these two networks are these two networks consumes huge amount of spectrum. The single frequency networks (SFN) ...
... networks (SFN) or multi frequency networks (MFN) and both these networks are ideal for meeting the practical requirements either in local and global services. Another important drawback in these two networks are these two networks consumes huge amount of spectrum. The single frequency networks (SFN) ...
William Stallings Data and Computer
... terrestrial microwave transmission satellite transmission broadcast radio infrared ...
... terrestrial microwave transmission satellite transmission broadcast radio infrared ...
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.