Implementation and performance study of opportunistic network coding in 802 11 based wireless ad hoc networks using qualnet

... Vai river); food poisoning (case of Melamine infected in infant milk); and other cheating in selling products to customers (the fraud in selling fuel) After suffering these cases, society requires ... individual people and company on CSR concept, the CSR implementation of companies in Ha Noi and its impacts to the development of the companies And in orde...

Ngày tải lên: 13/03/2014, 14:20

... (between and 24 h) used by the authors In another study, 258 differentially expressed genes were identified in C gigas in response to exposure to hydrocarbons for and 21 days [22], and some of these genes ... among the down -regulated genes Expression of herbicide -regulated genes The time-dependent expression of 13 genes that were up -regul...

Ngày tải lên: 30/03/2014, 15:20

... second mechanism, adaptive pacing, is used for regulating the data flow in a more balanced and fair way Adaptive pacing adds an extra interval to the backoff time, which is equal to the transmission ... However, only a single path is used for data transmission and the second one maintained as a backup path to minimise the chance of route unavailability To select a primary path...

Ngày tải lên: 21/06/2014, 00:20

... 20–30] for ad hoc networks with directional antennas are based on the IEEE 802.11 four-way handshake, with some adaptations to take advantage of directional communications Such adaptations include, ... this section More information about directional antenna models is found in [15–18] In wireless ad hoc networks with omnidirectional antennas, there is only one type...

Ngày tải lên: 21/06/2014, 23:20

... examined the uniform throughput of large ad hoc networks confined to a region of fixed area It was found that, for a large enough total area, as the total number of nodes increases, the achievable ... achievable throughput can exhibit an up-anddown behavior reaching a a maximum at a critical spatial node density that is proportional to a power of t...

Ngày tải lên: 22/06/2014, 00:20

... represents the local topological status of the wireless ad hoc network To a certain extent, the node locations and their corresponding degrees would affect the configuration of the wireless ad hoc network ... from (3) and reflects the distribution of A in the Y − Z plane Thus, the problem in three-dimensional space can be reduced to the combination of...

Ngày tải lên: 22/06/2014, 22:20

... The TCP instability problem in 802.11-based wireless ad hoc networks was first reported in [1], and it was further investigated in [2] The TCP unfairness problem in multihop wireless ad hoc networks ... propose a busy tone assisted broadcast and link error detection scheme with low overhead and good energyefficiency, where only the sender needs to transmit two short m...

Ngày tải lên: 22/06/2014, 22:20

... in wireless networks: efficient protocols and outage behavior,” IEEE Transactions on Information Theory, vol 50, no 12, pp 3062–3080, 2004 [4] M Qin and R S Blum, Capacity of wireless ad hoc networks ... wireless networks, ” IEEE Transactions on Information Theory, vol 46, no 2, pp 388–404, 2000 [2] S Toumpis and A J Goldsmith, Capacity regions for wireless ad hoc netwo...

Ngày tải lên: 22/06/2014, 22:20

... in wireless networks: efficient protocols and outage behavior,” IEEE Transactions on Information Theory, vol 50, no 12, pp 3062–3080, 2004 [4] M Qin and R S Blum, Capacity of wireless ad hoc networks ... wireless networks, ” IEEE Transactions on Information Theory, vol 46, no 2, pp 388–404, 2000 [2] S Toumpis and A J Goldsmith, Capacity regions for wireless ad hoc netwo...

Ngày tải lên: 22/06/2014, 22:20

... because of the affinity of one of the strains involved in the study towards the reactor material Since the interaction of population and resource dynamics in biofilm communities can be very different ... improvements that may be revealed by experimental results to be necessary to account for a qualitatively and quantitatively accurate description of siderophore mediat...

Ngày tải lên: 13/08/2014, 16:20

... between network layer and application layer The availability of cross- layer information can greatly help both in network layer and in application layer By taking the offered load information from ... physical radio Without such kind of information, transport and application layers cannot adapt (or react) to the additional physical -layer time-varying constraints su...

Ngày tải lên: 09/09/2015, 11:24

... both physical (PHY) layer and medium access control (MAC) layer In this thesis, we focus on cognitive radio networks (CRN) and aim to improve the spectrum sensing performance at the PHY layer and ... Sensing Strategies for Cognitive Radio Mesh Networks Chapter Cooperative Spectrum Sensing Strategies for Cognitive Radio Mesh Networks In this chap...

Ngày tải lên: 10/09/2015, 15:53

... the two major areas related to the work described herein These are the study of TCP performance in ad hoc networks and the mathematical approaches to model TCP in the Internet 2.1 2.1.1 TCP in ... THE STUDY OF TCP PERFORMANCE IN IEEE 802. 11 BASED MOBILE AD HOC NETWORKS LI XIA (B Sc., Nan Jing University, PRC ) A THESIS SUBMITTED FO...

Ngày tải lên: 13/09/2015, 21:25

... Decision Process Single-Agent: basic MDP, SMDP, HSMDP Mobile Ad Hoc Network Multi-Agent: DEC-POMDP How to Achieve Stability? How to Control & Optimize? How to Derive Bounds? Model-Based: DP Irreducibility, ... V-Uniform Ergodicity, Drift Conditions Model-Free: NDP/RL, Policy Gradient Main Contribution: Achieve Stability, Bounds, Optimal Control & Optimization simultaneously ệ ẵẵ è ì...

Ngày tải lên: 14/09/2015, 12:46

... message on the performance of opportunistic network coding scheme We then use the findings for further study of network coding scheme on large scale wireless ad- hoc networks We find out there is an ... mobile ad- hoc networks In this thesis we propose to first study and investigate the performance behavior and key control parameters of opportunistic...

Ngày tải lên: 16/10/2015, 11:59