wireless networks in range but cannot connect
Tài liệu Designing for Profitability in the Physical Layer of Wireless Networks docx
Ngày tải lên :
21/12/2013, 08:17
... evident in fiber
connector cleaning. Dirty connectors are the leading
cause of poor fiber performance and the most likely
failure points in the network, making periodic cleaning
of connectors ... bends in routing paths,
adding new fibers on top of existing fibers can greatly
increase the pressure on existing fibers. As a result,
fibers that have performed fine for years start showing
increased ... meeting the needs of Operations by
designing and implementing the physical layer with a foundation of connectivity.
Designing for Profitability in the
Physical Layer of Wireless Networks
Introduction
Growth...
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Tài liệu Connectivity Solutions and Services for Wireless Networks pptx
Ngày tải lên :
17/01/2014, 11:20
...
network, including:
• Wireless Operations Center
• Network Operations Center
• Base Station
• Street-Level
• Campus and In- Building
• Metro-Fiber Ring
Connectivity Solutions and Services for Wireless ... and Services for Wireless Networks
Enabling Voice, VoIP, Messaging and IP Data
Connectivity Solutions and Services for Wireless Networks
Enabling Voice, VoIP, Messaging and IP Data
ADC Solution
Network ... X
Alarm Panels
An interface panel designed to centralize
multiple alarm circuite into a single
connection/interface point. Contact product
management or TAC for more information.
X X
Connectivity...
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Tài liệu WIRELESS NETWORKS FOR IN-BUILDING ENVIRONMENTS White doc
Ngày tải lên :
27/01/2014, 15:20
... or indoor cells, resulting in
different quality of the mobile coverage inside the different buildings.
5
284 23-3026 Uen Rev B
2.2 Coverage using Dedicated In- Building RBS
In- building ... satisfactory in- building coverage, but in other cases it is far
from acceptable.
Thick walls, metal-coated windows and other obstacles often hinder radio
waves from penetrating inside buildings. ...
believed to increase the need for in- building solutions.
It can also be assumed that in most cases mobile Internet users will be sitting
comfortably inside buildings, rather than walking around...
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Security and Privacy Vulnerabilities of In-Car Wireless Networks: A Tire Pressure Monitoring System Case Study ppt
Ngày tải lên :
23/03/2014, 10:20
... the interstate highway I-26
(Columbia, South Carolina) with two cars running in par-
allel at speeds exceeding 110 km/h.
4.2 Eavesdropping Range
We measured the eavesdropping range in both indoor ... (2008),
3187–3199.
16
Eavesdropping
range
Indoor
noise floor
Outdoor
noise floor
Boosted
range
Amplified
noise floor
Original
noise floor
Original
range
(a) indoor vs. outdoor (w/o LNA) (b) with LNA vs. without LNA (indoor)
Figure ... risks in wireless
hotspot networks. In Security in Pervasive Computing,
First International Conference (2003), pp. 10–24.
[20] GRU T ESE R , M., A N D GRU NWAL D, D. Enhancing loca-
tion privacy in...
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security & quality of service in ad hoc wireless networks
Ngày tải lên :
25/03/2014, 12:07
... dissolving the resin covering the silicon
using fuming acid. The next step involves layout reconstruction using a systema-
tic combination of microscopy and invasive removal of covering layers. During
layout ... routing mes-
sages and advertize non-existent links, provide incorrect link state information
and flood other nodes with routing traffic, thus inflicting Byzantine failures on
the system.
The wireless ... metric information can be inserted into legitimate
protocol packets by malicious insider nodes.
3.6 Attacks against routing or network layer
Attacks against routing are basically of two types: internal...
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Báo cáo hóa học: " Enabling location-aware quality-controlled access in wireless networks" pdf
Ngày tải lên :
20/06/2014, 22:20
... traffic scheduling in
802.11 WLANs with access point, in Proceedings of IEEE VTC-Fall (2003)
16. S Kim, B-S Kim, Y Fang, Downlink and uplink resource allocation in IEEE
802.11 wireless LANs. ... Analytical modeling of TCP clients in Wi-Fi hot
spot networks, in Proceedings of IFIP Networking (2004)
36. S Choi, K Park, C Kim, Performance impact of inter-layer dependency in
infrastructure ... unfairness
by reducing the chances of transmission for the sending
stations in the way of increasing the minimum conten-
tion window size. The downlink compensation access
(DCA) algorithm in [16] gives...
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Báo cáo hóa học: " Minimum-length scheduling with rate control in wireless networks: a shortest path approach" docx
Ngày tải lên :
20/06/2014, 22:20
... proportional
fairness in wireless networks, in Proceedings of Conference on Information
Sciences and Systems (CISS) (2008)
24. A Pantelidou, A Ephremides, What is optimal scheduling in wireless
networks? , in Proceedings ... problem of joint sche-
duling and rate control in single-hop wireless networks
under the objective of minimizing the required time to
deliver all data traffic to the intended destinations. First,
we ... (i.e. , [1-10]) studies the mini-
mum-length schedul ing problem only for time-invariant
wireless networks. Since the wireless channel in reality
is time-varying, in the second part of this paper,...
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Báo cáo hóa học: " Enabling location-aware quality-controlled access in wireless networks" ppt
Ngày tải lên :
21/06/2014, 00:20
... a wireless link error
scenario comes into play in order to see whether the
fairness is supported in t ime-varying unreliable wireless
link, whi ch is to ver ify the role of
ω
s
i
in calculating
per-location ... unfairness
by reducing the chances of transmission for the sending
stations in the way of increasing the minimum conten-
tion window size. The downlink compensation access
(DCA) algorithm in [16] gives ... contents-providing services, presence services, and E-911
locating services, have recently been drawing much attention in wireless network community. Since LBSs rely on
the location information in providing...
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Báo cáo hóa học: " Opportunistic scheduling policies for improved throughput guarantees in wireless networks" doc
Ngày tải lên :
21/06/2014, 01:20
... Robin Scheduling
Max CNR Scheduling
Proportional Fair Scheduling
Normalized CNR Scheduling
Borst&Whiting Scheduling
Optimal Scheduling
Adaptive Optimal Scheduling 1
Adaptive Optimal Scheduling ... Robin Scheduling
Max CNR Scheduling
Proportional Fair Scheduling
Normalized CNR Scheduling
Borst&Whiting Scheduling
Optimal Scheduling
Adaptive Optimal Scheduling 1
Adaptive Optimal Scheduling ... Robin Scheduling
Max CNR Scheduling
Proportional Fair Scheduling
Normalized CNR Scheduling
Borst&Whiting Scheduling
Optimal Scheduling
Adaptive Optimal Scheduling 1
Adaptive Optimal Scheduling...
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báo cáo hóa học: " Handoff optimization in 802.11 wireless networks" pot
Ngày tải lên :
21/06/2014, 02:20
... access
point (AP). In order to reduce the time in processing a
handoff, its operations must be integrated across layers.
Even though lower-laye r protocols involved in handoff
are simplex, integration ... balancing in wireless LANs
using association control. Proceedings of ACM Mobicom October 2004.
15. Du L, Bai Y, Chen L: Access point selection strategy for large-scale
wireless local area networks. ... Access
Handoff optimization in 802.11 wireless networks
IP Hsieh and Shang-Juh Kao
*
Abstract
In 802.11 wireless networks, a complete handoff procedure for a mobile node requires access point (AP) selection,
AP...
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Báo cáo hóa học: " Research Article Location-Based Self-Adaptive Routing Algorithm for Wireless Sensor Networks in Home Automation" doc
Ngày tải lên :
21/06/2014, 05:20
... receives the RREP, it inserts the
routing information about D into its routing table and uses
this routing information to send data to D.
Instead of blindly searching for the route in the entire
network, ... and X. F. Piao,
“Routing protocol for wireless sensor networks in home
automation,” in Proceedings of the 8th IFAC International
Conference on Fieldbuses & neTworks in Industrial & Embedded
Systems ... wireless
sensor networks, ” Wireless Networks, vol. 8, no. 2-3, pp. 169–
185, 2002.
[13] D. Braginsky and D. Estrin, “Rumor routing algorithm for
sensor networks, ” in Proceedings of the 1st ACM Interna-
tional...
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Báo cáo hóa học: " Research Article Virtual Cooperation for Throughput Maximization in Distributed Large-Scale Wireless Networks" pptx
Ngày tải lên :
21/06/2014, 08:20
... .Finally,(e) follows from the fact that 1 −x ≤
e
−x
, ∀x, and noting that α = α.Combining (72)and(79)
and substituting into (68)yields
16 EURASIP Journal on Advances in Signal Processing
Since ... we study the throughput
maximization of a distributed single-hop wireless network
with K links, operating in a bandwidth of W. Wireless
networks using unlicensed spectrum (e.g., Wi-Fi systems
based ... action in the proposed distributed wireless network
as a virtual cooperation without broadcasting information
from one link to the other links.
The network throughput in this paper is defined in two
ways:...
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Báo cáo hóa học: " Research Article A Simulation Study: The Impact of Random and Realistic Mobility Models on the Performance of Bypass-AODV in Ad Hoc Wireless Networks" pdf
Ngày tải lên :
21/06/2014, 11:20
... U. Baroudi, “Bypass-AODV: improving
performance of ad hoc on-demand distance vector (AODV)
routing protocol in wireless ad hoc networks, ” in Proceedings
of the International Conference on Ambient ... the routing overhead in
Bypass-AODV experiences little increase relative to AODV,
as shown in Figure 13. On the other hand, increasing the
speed will increase the possibility of overlapping between
groups, ... all the nodes in the ad hoc network share the
same transmission medium. If a node is transmitting, other
nodes within a certain range of the transmitting node cannot
transmit. Two ranges are defined...
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Báo cáo hóa học: " Research Article Cross-Layer Handover Scheme for Multimedia Communications in Next Generation Wireless Networks" potx
Ngày tải lên :
21/06/2014, 11:20
... algorithm providing better
performance to the multiinterface terminals in the integrated
networks can be found in [18].
3.2.4. SIP and MIP Bing Update. After sending UNA to the
NAR for announcing its ... current connecting link is going down (i.e.,
LGD event). Then the HDM chooses the target handover
network by using the neighboring network information in
the MN’s cache, and turns on the corresponding ... as
MIH
Link Up (the L2 connection is established, and the link
is available for the user), MIH
Link Going Down (the loss
of the L2 connection is imminent), and MIH
Link Down
(the L2 connection...
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