osi model functions of data link layer and network layer

Ngày tải lên: 11/08/2014, 17:20

... which network devices you can trust and which software you can rely on. Under no circumstances should an assumption be made that all software are bug-free. 9. Understand Typical Network Functions Understanding ... Understand Typical Network Functions Understanding how a network system normally functions, being aware of what is expected and unexpected, and knowing how network devices are usually utilized will ... to understand and identify the organization’s network assets and determine the degree to which each of these assets must be protected. Items to be considered include hardware, software data, procedures,...

Ngày tải lên: 28/03/2014, 22:20

... synopsis of CAC under different network parameters. The majority of CAC 1 Mobile and WirelessCommunications: Network layer and circuitleveldesign4 In soft handoff schemes, the handoff process ... chapters related to Network Aspects and Applications of Ad Hoc, Sensor and Mesh Networks. In this section, the network layer design in cellular, ad hoc, sensor and mesh networks for specic ... CallAdmissionControlinMobile and WirelessNetworks 7 probability. Most schemes in the literature assign higher priorities to handoff calls resulting in less strict admission conditions for the admission of handoff...

Ngày tải lên: 21/06/2014, 14:20

... Mobile and WirelessCommunications: Network layer and circuitleveldesign44 Proof. Let the error between the average RSS and the RSS of the node j ,   iijiiijij AGPeRe  == and the ... Requirements in Cellular Networks. IEEE Transactions on Parallel and Distributed Systems, 13 (9), 898-910. Mobile and WirelessCommunications: Network layer and circuitleveldesign36 network topology. ... architecture which enables the entire network to communicate simultaneously. Moreover, we derive the capacity of the network in-terms of the number of nodes in the network and introduce a power control...

Ngày tải lên: 21/06/2014, 14:20

... generation Mobile and WirelessCommunications: Network layer and circuitleveldesign60 Mobile and WirelessCommunications: Network layer and circuitleveldesign76 3.3 Bluetooth Profiles The different ... Profile INTP Intercom Profile CTP Cordless Telephony Profile DUN Dial-up Networking Profile FAXP FAX Profile GEOP Generic Object Exchange Profile HSP Headset Profile LAP LAN Access Profile ... Exchange Profile HSP Headset Profile LAP LAN Access Profile HFP Hands Free Profile SAP SIM Access Profile FTP File Transfer Profile OPP Object Push Profile SYNCH Synchronisation Profile BIP...

Ngày tải lên: 21/06/2014, 14:20

... Mobile and WirelessCommunications: Network layer and circuitleveldesign140 Fig. 2 shows a schematic of the cross-sectional and the top views of this potentially high gain, wide band antenna ... largely involve the use of layered materials with high and low permittivities in adjacent layers (Chen, 2008). However such 8 Mobile and WirelessCommunications: Network layer and circuitleveldesign116 ... partly of air and partly of substrate (Papapolymerou et al., 1998, Hou et al., 2008, Ojefors et al., 2006, Kratz and Stenmark, 2005). Examples with both equal and unequal thicknesses of air and...

Ngày tải lên: 21/06/2014, 14:20

... relevant values of the model parameters (Kompa & Novotny, 1997). For further Mobile and WirelessCommunications: Network layer and circuitleveldesign182 Fig. 23. Geometry of band notch monopole ... The OFF state the band notch is removed and the antenna bandwidth returned flat. The simulation and experimental results comparison for the ON state and OFF state are presented in figures 24 and ... broaden the bandwidth of the antenna system. PIFA impedance matching can be obtained by the correct positioning of feeding and grounding pins. Thickness of the antenna and permittivity of the substrate...

Ngày tải lên: 21/06/2014, 14:20

... Simulated and (circles) measured S-parameters of a 8x125-μm GaN HEMT at (a) V GS = −2.0 V and V DS = 9.0 V and (b) V GS = −3.0 V and V DS = 21.0 V. Mobile and WirelessCommunications: Network layer and circuitleveldesign212 ... with adequate gain and bandwidth in low- voltage CMOS process are preserved. Hence, techniques of feedback and feedforward Mobile and WirelessCommunications: Network layer and circuitleveldesign226 ... (Lines) Simulated and (circles) measured S-parameters of a 8x125-μm GaN HEMT at (a) V GS = −2.0 V and V DS = 9.0 V and (b) V GS = −3.0 V and V DS = 21.0 V. Large-SignalModeling of GaNDevicesforDesigning HighPowerAmpliers of NextGenerationWirelessCommunicationSystems...

Ngày tải lên: 21/06/2014, 14:20

... physical layer (PHY) and the software layer (or MAC: Medium Access Control). The goal is to ensure the interoperability of data networking, the security services and a range of wireless home and ... resistance formed by R and the drain to source resistor of Mn1 and Mp1, C eq represents the sum of drain to bulk and the gate to source capacitances C dbn1 , C dbp1 and C gsp1 of Mn1 and Mp1 respectively. ... - - Mobile and WirelessCommunications: Network layer and circuitleveldesign232 (c) Fig. 10. IRR variation of (a) three, (b) four, and (c) five PPF versus resistor’s sizes and values ...

Ngày tải lên: 21/06/2014, 14:20

... maximum data rate is the product of the bandwidth BW and spectral efficiency E=k /(1+a), where k is the number of bits per symbol, and a is the excess bandwidth (or roll-off factor) of the root-raised-cosine ... gain, S 21 , of 15dB and a 3-dB bandwidth of 6GHz from 56.5GHz to 62.5GHz. The input and output return losses, S 11 and S 22 , are less than -10dB for the entire frequency band of interest ... root-raised-cosine digital filters and linear-phase analogue filters. The base band signal bandwidth was 625 MHz at a symbol rate of 0.5 giga symbols per second and the RRC roll -of factor of 0.25....

Ngày tải lên: 21/06/2014, 14:20

... 1990s, the GSM and IS-95 standards, evolved to include data transmission as an effective part of its services. Besides, the 3G and 4G are being applied and developed with voice and data integration. ... gain, S 21 , of 15dB and a 3-dB bandwidth of 6GHz from 56.5GHz to 62.5GHz. The input and output return losses, S 11 and S 22 , are less than -10dB for the entire frequency band of interest ... 15 Mobile and WirelessCommunications: Network layer and circuitleveldesign306 the conception and development of several RFICs, for example, LNAs (Low Noise Amplifiers), mixer, and VCOs (Voltage...

Ngày tải lên: 21/06/2014, 14:20

... behavior and a new nonlinear coupling network of a series connection of C dd and R dd between the drain and a lossy substrate. The robustness of the new nonlinear deep sub- micron MOSFET model ... behavior and a new nonlinear coupling network of a series connection of C dd and R dd between the drain and a lossy substrate. The robustness of the new nonlinear deep sub- micron MOSFET model ... increase of V GS whereas the junction capacitance C DB of M2 described in (15) decreases with an increase of V DB (=V GS of M1). Therefore, with a proper choice of the dimensions of M1 and M2,...

Ngày tải lên: 21/06/2014, 14:20

... wireless systems for reliable and rapid deployment of data and voice networks. RF and millimetre wave technologies wireless networks can offer data rates from tens of Mbps (point-to-multipoint) ... level of performance can be obtained from the analysis of Section 5. Mobile and WirelessCommunications: Network layer and circuitleveldesign358 2.1 Features of FSO The basic features of ... than RF. And in any communication system, the amount of data transported is directly related to the bandwidth of the modulated carrier. The allowable data bandwidth can be up to 20 % of the...

Ngày tải lên: 21/06/2014, 14:20

Ngày tải lên: 21/06/2014, 18:20