Cooperative internet access using heterogeneous wireless networks

... wide array of wireless networks, ranging from satellite networks to Wireless Personal Area Networks, with Wireless Wide Area (Cellular) Networks and Wireless Local Area (WiFi) Networks being ... 1.1 Convergence of Heterogeneous Wireless Networks Development in new wireless access technologies and increase in mobile users’ demands for ubiquitous high-speed Internet...

Ngày tải lên: 14/09/2015, 08:46

... Communications and Networking MAP New AR MN AAA server CN RS RA BU Authentication and binding registration AAA request AAA reply BA IP config and DAD Data flow Figure 4: HMIPv6 domain handover signaling call ... signaling overhead during handover, we introduce a novel mechanism that enhances handover performance in terms of further reducing handover delay and packet loss while main...

Ngày tải lên: 21/06/2014, 17:20

... propose cooperative protocols for video transmission to better utilize system resources for performance improvement Moreover, because of the broadcast nature of the phase in cooperative transmission, ... video transmission with side information, we have obtained up to dB gain over the amplify-and-forward or decode-and-forward protocols For the multiuser case, we conce...

Ngày tải lên: 21/06/2014, 20:20

... adapting the bandwidth of existing call an (or ah ) = − j means accept the new class-i i i (or handoff class-i) call into RAT- j after adapting (degrading) the bandwidth of existing call( s) In the ... at least the minimum bandwidth needed Handoff calls are prioritized over new calls by using different call rejection thresholds for new and handoff calls, and also by using diffe...

Ngày tải lên: 22/06/2014, 19:20

... DESIGN OF MEDIUM ACCESS CONTROL TECHNIQUES FOR COOPERATIVE WIRELESS NETWORKS WANG YU (B Eng., Huazhong University of Science and Technology, China) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR ... delivered in a 1.1 Cooperative Medium Access Control Figure 1.2: System model for centralized networks Figure 1.3: System model for distributed networks 1.1...

Ngày tải lên: 09/09/2015, 09:59

... mobile data While the need for broadband wireless Internet access is widely accepted, there remains great uncertainty and disagreement as to how the wireless Internet future will evolve.2 The goal ... histories Speaking broadly, 3G offers a vertically integrated, top–down, service-provider approach to delivering wireless Internet access; while WiFi offers (at least potentially)...

Ngày tải lên: 15/03/2014, 22:20

... unfairness by reducing the chances of transmission for the sending stations in the way of increasing the minimum contention window size The downlink compensation access (DCA) algorithm in [16] gives ... presence of link errors In order to handle wireless link errors within TaLE framework, we need to measure and reflect link reliability into the proposed algorithm Underlying reasonin...

Ngày tải lên: 20/06/2014, 22:20

... unfairness by reducing the chances of transmission for the sending stations in the way of increasing the minimum contention window size The downlink compensation access (DCA) algorithm in [16] gives ... presence of link errors In order to handle wireless link errors within TaLE framework, we need to measure and reflect link reliability into the proposed algorithm Underlying reasonin...

Ngày tải lên: 21/06/2014, 00:20

... http://jwcn.eurasipjournals.com/content/2 011 /1/ 3 10 11 12 13 14 15 Page 12 of 12 T Korakis, Z Tao, Y Slutskiy, S Panwar, A cooperative MAC protocol for ad hoc networks IEEE Pervasive Computing and ... ITU-R M .12 25 http://www.itu.int/oth/R0A0E00000C/en (2009) doi :10 .11 86 /16 87 -14 99-2 011 -3 Cite this article as: Khalid et al.: Coherence time-based cooperativ...

Ngày tải lên: 21/06/2014, 03:20

... on Wireless Communications and Networking nodes in the heterogeneous WSNs has been considered in [12, 13] In this paper, we investigate secure clustering of wireless sensor nodes with evaluating ... information exchange prior to and after deploying sensor nodes and gateways: (a) embedding keys into gateways and sensor nodes, (b) information exchange between sens...

Ngày tải lên: 21/06/2014, 11:20

... original data segments, and we refer to it as Cooperative Coding and Caching (C ); compre for example Network Coding (NC) and no coding at all (Non-NC ) 3.1 Overview of Cooperative Coding and Caching ... the caching data management This paper takes advantages of coding to facilitate the caching management for streaming data in multihop wireless...

Ngày tải lên: 21/06/2014, 17:20

... “Polarization Division Multiple Access With Polarization Modulation for LOS Wireless Communications by Bin Cao, Qin-Yu Zhang, and Lin Jin discusses a potential multiple access and modulation ... Multiple access communications in future-generation wireless networks Norman Abramson1, Claudio Sacchi2, Boris Bellalta*3 and Alexey Vinel4 Department of Electrical Engineering,...

Ngày tải lên: 21/06/2014, 17:20

... 2 EURASIP Journal on Wireless Communications and Networking this protocol, both under an individual and a sum-power constraint assuming perfect channel state information ¨ In the third article, ... delve into the ou appropriate coding schemes for a two-user cooperative communications channel They propose the use of coordinate interleaved trellis codes over QPSK and 8PSK modulations...

Ngày tải lên: 21/06/2014, 22:20

... to estimate the location of a transmitter with minimal information available at a set of receivers Our approach adapts the concept of moving average from a weighting method over time and applies ... et al [17] and localizes the transmitting source of a message to the (x, y) coordinates obtained from averaging the coordinates of all receiving devices within range Weighted...

Ngày tải lên: 21/06/2014, 23:20

... scheme, our spectrum access scheduling achieves spectrum sharing of the same RF bands among wireless users that operates different wireless systems, instead of supporting homogeneous wireless stations ... wireless systems or the whole system to be spectrum agile In this paper, the spectrum access scheduling approach changes the base stations in order to allow the coexist...

Ngày tải lên: 21/06/2014, 23:20