Fairness issues in multihop wireless ad hoc networks
Fairness issues in multihop wireless ad hoc networks
... fewer chances to win the contention) 1.4 Fairness Issues in Multihop Wireless Ad Hoc Networks As in wireline networks, fairness in multihop wireless ad hoc networks can also be investigated at ... 1.3.1 10 Fairness Issues in Multihop Wireless Ad Hoc Networks 12 1.4.1 1.4 Model of Multihop Wireless Ad Hoc Networks 12 MAC/Link Layer (...
Báo cáo hóa học: " Research Article QoS-Aware Maximally Disjoint Routing in Power-Controlled Multihop CDMA Wireless Ad Hoc Networks" pdf
... Also, in order to provide assured QoS, we propose multiple disjoint paths (minimum two) routing as opposed to single path routing Single path routing is not reliable The path may be broken during ... are two types of disjoint paths, namely, nodedisjoint paths and link -disjoint paths Node -disjoint paths are also link -disjoint, but not vice versa An example is illus- trated in...
Báo cáo hóa học: " A survey of performance enhancement of transmission control protocol (TCP) in wireless ad hoc networks" pptx
... 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...
Báo cáo hóa học: " Research Article Tree-Based Distributed Multicast Algorithms for Directional Communications and Lifetime Optimization in Wireless Ad Hoc Networks" pptx
... Cheng, J Sun, M Min, and D.-Z Du, “Energy-efficient broadcast and multicast routing in ad hoc wireless networks,” in Proceedings of the 22nd IEEE International Performance, Computing and Communications ... Leung, and O W W Yang, Distributed multicast algorithms for lifetime maximization in wireless ad hoc networks with omni -directional and directional...
Topology Control in Wireless Ad Hoc Networks phần 1 pdf
... MobiHoc – Tokyo, May 24, 2004 Tutorial outline Introduction – – – Stationary networks – – – Motivation: the need for Topology Control (TC) in ad hoc networks An ad hoc network model Topology ... consumption and/or increasing network capacity Istituto di Inform atica e Telem atica Introduction: 1/ 7 5th ACM MobiHoc – Tokyo, May 24, 2004 Topology control: an inform...
Topology Control in Wireless Ad Hoc Networks phần 2 ppsx
... di Inform atica e Telem atica the CTR: 3/ 12 5th ACM MobiHoc – Tokyo, May 24 , 20 04 CTR: probabilistic approaches In many realistic scenarios, node positions are not known in advance (for instance, ... distributed uniformly in R = [0,1 ]2 Here, the CTR is defined as the minimum transmitting range that generates at least 99% of connected graphs the CTR: 9/ 12 5th ACM MobiHoc – To...
Topology Control in Wireless Ad Hoc Networks phần 3 potx
... the minimum-power path in G’ and in G In words, the power stretch factor is a measure of the increase in the energy cost due to the fact that we communicate using the routing graph G’ instead ... routing messages between nodes in an energy-efficient way Why use the routing graph G’ instead of G? – Because G’ is sparse, thus the task of finding routes between nodes is much easier...
Topology Control in Wireless Ad Hoc Networks phần 4 pot
... Major advantage of topology control: reduce interferences, thus increasing network capacity node degree = “measure” of expected interference (low is good) So far, emphasis on reducing the ... algorithm that constructs a broadcast spanner is known Istituto di Inform atica e Telem atica Energy-efficient communication: 7/7 5th ACM MobiHoc – Tokyo, May 24, 20 04 Topology control proto...
Topology Control in Wireless Ad Hoc Networks phần 5 ppsx
... mobility model in the ad hoc networks community Every node chooses uniformly at random a destination in [0,1]2, and moves towards it along a straight line with velocity chosen at random in [vmin,vmax] ... Optimal value of k for increasing values of n (from [Blough et al 03]) Remark: setting k = guarantees connectivity w.h.p for values of n ranging from 50 to 50 0 Istituto di Inf...
Topology Control in Wireless Ad Hoc Networks phần 6 potx
... Open issue Istituto di Inform atica e Telem atica Mobility: 10/10 5th ACM MobiHoc – Tokyo, May 24, 2004 Open issues Considerable body of research devoted to TC in ad hoc networks, but several ... idealized model of a real wireless network Main limitation of this model: assumption that the radio coverage area is a perfect circle In realistic scenarios: radio coverage area infl...
Topology Control in Wireless Ad Hoc Networks phần 7 ppt
... Preliminary step in this direction: the determination of the information exchange period for the LMST protocol [Li et al.03b] Istituto di Inform atica e Telem atica Open issues: 7/ 11 5th ACM MobiHoc ... reconfiguration o o o In general, there is a trade off between the frequency of re-execution of the TC protocol and “quality” of the topology Open issue: given a certain constraint (on...
Topology Control in Wireless Ad Hoc Networks phần 8 ppt
... 7/16 5th ACM MobiHoc – Tokyo, May 24, 2004 Infinite loop If not implemented carefully, the optimization described in the previous slide can lead to packets getting into infinite loops! n1 S ... level-based implementation of kneighbors topology control The basic idea is the following: – – – – Every node starts transmitting at minimum power After a certain stabilization period, the no...
Implementation and performance study of opportunistic network coding in 802 11 based wireless ad hoc networks using qualnet
... 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...
WIRELESS AD-HOC NETWORKS docx
... Preface VII Section MAC Protocols for Wireless Ad-Hoc Networks Chapter Comparison of the Maximal Spatial Throughput of Aloha and CSMA in Wireless Ad-Hoc Networks B Blaszczyszyn, P Mühlethaler ... for Wireless Ad-Hoc Networks Provisional chapter Chapter Comparison of the Maximal Spatial Throughput of Comparison of the Maximal Spatial Throughput of Aloha and CSMA in Wireless...
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