wireless networks in range but cannot connect

Ngày tải lên: 21/06/2014, 17:20

Ngày tải lên: 18/10/2013, 12:15

... 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...

Ngày tải lên: 21/12/2013, 08:17

... 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...

Ngày tải lên: 17/01/2014, 11:20

... 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...

Ngày tải lên: 27/01/2014, 15:20

... 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...

Ngày tải lên: 23/03/2014, 10:20

... 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...

Ngày tải lên: 25/03/2014, 12:07

... 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...

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,...

Ngày tải lên: 20/06/2014, 22:20

... 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...

Ngày tải lên: 21/06/2014, 00:20

... 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...

Ngày tải lên: 21/06/2014, 01:20

Ngày tải lên: 21/06/2014, 01:20

... 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...

Ngày tải lên: 21/06/2014, 02:20

... 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...

Ngày tải lên: 21/06/2014, 05:20

... .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:...

Ngày tải lên: 21/06/2014, 08:20

... 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...

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...

Ngày tải lên: 21/06/2014, 11:20

Ngày tải lên: 21/06/2014, 11:20

Ngày tải lên: 21/06/2014, 16:20

Ngày tải lên: 21/06/2014, 17:20