vimloc for large scale wireless mesh networks

... (RSAFE) schemes for large-scale networks The innovative idea of the SAFE scheme is to adopt the multiple subnets architecture for solving the scalability issue for large-scale networks while maintaining ... Software-based Fault-Tolerant Schemes for Large-scale Ethernet Networks 대규모 이더넷 망을 위한 새로운 소프트웨어 Trang 2Novel Software-based Fault-Tolerant Schemes for Large-scale Ethernet Networks Submitted in partial ... fulfillment of the requirements for the Ph.D degree in Information and Communications Trang 3Novel Software-based Fault-Tolerant Schemes for Large-scale Ethernet Networks Graduate School, Myongji

Ngày tải lên: 27/01/2021, 00:48

... suitable for small-scale deployments or low-bandwidth and limited processing applications such as wireless sensor networks and not wireless metropolitan area networks For large-scale networks, ... complexity Mesh Router Mesh Clients Mesh Clients Mesh Router Mesh Router Access Point a) Infrastructure Network b) Ad-Hoc Network c) Wireless Mesh Network Figure 2.1: Architectures of wireless access networks ... 13 2.2 Overview of Wireless Routing Protocols 17 2.2.1 Reactive Routing Protocols for Wireless Multi-hop Networks 18 2.2.2 Proactive routing protocols for wireless multi-hop networks 24 2.2.3

Ngày tải lên: 27/01/2021, 10:21

... a wireless backhaul mesh network Apparent link-failuresare often a significant cause for performance degradation of mesh networks, and thus a model is needed in order to diminish their effect For ... of mesh networks can be increased, but also the general performance of such networks can be improved.Apparent link-failures are often a significant cause for performance degradation of ad hocnetworks ... similarly for each edge, i.e the random graph G(V, E, p)where p is Trang 3Wired infrastructure MPPMP MP: Mesh Point MPP: Mesh Portal MAP: Mesh Access Point STA: Station Fig 2 A wireless mesh network

Ngày tải lên: 20/06/2014, 12:20

... implemented in the mesh routers Every packetreceived by a router from a mesh client should be compressed before being forwarded to themesh backbone, and each packet forwarded to a mesh client should ... does not present a good performance over wireless networks, since it was originallydeveloped for reliable connections (Koren et al., 2003), and characteristic of wireless networkspresent high packet ... propagation problem Thefact that wireless networks do not necessarily offers a feedback channel available to requestfor context recovery also influences the poor performance of CRTP The Robust Header

Ngày tải lên: 20/06/2014, 12:20

... transmission of the wireless networks makes these networks prone to passive eavesdropping by the external attackers within the transmission range of the communicating nodes Multi-hop wireless networks ... the brute force mechanisms Partial matching attacks exploit the weak implementations of encryption algorithms For example, the IEEE80.11i standard for MAC layer security in wireless networks is ... metrics, which have been shown to be critical for achieving high performance in wireless networks On the contrary, many of them even have to remove important performance optimizations in existing protocols

Ngày tải lên: 20/06/2014, 12:20

... network Mobile ad hoc network Sensor network Mesh router With gateway Wireless Mesh backbone Mesh router With gateway Figure 1 A wireless mesh network. Trang 3for selecting the next hop node First a ... mesh routers and mesh clients [1] Wireless mesh routers are inter-connected as a multi-hop backbone to provide mesh cli-ents, network access As shown in Figure 1, among all mesh routers, some ... using high-sensitive sensing device for multi-hop wireless mesh network Abstract Throughput maximization is one of the main challenges in multi-hop wireless mesh network (WMN) Throughput of the

Ngày tải lên: 20/06/2014, 22:20

... selection and Tx/Rx beamforming for large-scale MIMO systems in 60 GHz channels Ke Dong1, Narayan Prasad2, Xiaodong Wang3*and Shihua Zhu1 Abstract We consider a large-scale MIMO system operating ... resort to a simple stochastic gradient method for updating the beamformers 4.1 Stochastic gradient algorithm for beamformer update The algorithm for the beamformer update is a generali-zation of [14] ... antenna selection technique is used to fully exploit the beamforming gain afforded by the large-scale MIMO antennas Although various schemes for antenna selec-tion exist in the literature [7-10], they

Ngày tải lên: 21/06/2014, 01:20

... discrete wavelet transform (DWT) where the wavelet transformation can be carried out without the need for full be performed on a portion of the wavelet subbands The sequentially performs SPIHT coding ... also performs significance tests on both the 1 zerotree and degree-2 zerotree Despite improving the coding performance by providing more levels of descendant information for each performs significance ... suitable for processing large images especially in a hardware constrained environment where limited amount of memory is available A low-memory wavelet transform that computes the of memory required for

Ngày tải lên: 21/06/2014, 20:20

... Figure 2: Cluster-based network formation in CogMesh. in the context of wired and wireless networks [11–13] Network coding can offer network throughput improvement for two-way communication flows ... in a dynamic wireless mesh networking environment The research on CR has already penetrated into different types of wireless networking scenarios, covering almost every aspect in wireless communications ... paper, we focus on the cognitive wireless mesh networking framework, named as CogMesh which is described in [4] with more details As illustrated inFigure 1, CogMesh is a self-organized and self-configured

Ngày tải lên: 21/06/2014, 20:20

... the original work is properly cited 1 Introduction Wireless mesh networks (WMNs) consist of a multihop building large-scale multihop wireless networks is the insuf-ficient network capacity when ... will become one of the most important functions for cognitive radio networks in future open spectrum environment The characteristic of wireless mesh networks [1] makes it attractive and feasible ... multi-chanchan-nel wireless mesh networks We mathematically formulate the channel width adaptation, logical topology design, and routing as a joint optimization problem Our mathematical formulation

Ngày tải lên: 21/06/2014, 23:20

... consumption per node of LPL and DW-LPL for varying sleep intervals,Tpfor LPL andTb for DW-LPL In Figure 8(a),Tp =100 ms is best for data generation interval Td =10 s ForTd =30 s, the optimalTplies between ... sleeping for wireless sensor net-works,” IEEE/ACM Transactions on Networking, vol 12, no 3, pp 493–506, 2004 [4] I Rhee, A Warrier, M Aia, and J Min, “Z-mac: a hybrid MAC for wireless sensor networks,” ... the energy performance even for relatively large broadcast traffic ratio by introducing adaptive beaconing concept; In following sections we analyze the benefit of traffic adaptation for sporadic

Ngày tải lên: 21/06/2014, 23:20

... Trang 1Access-Point Allocation Algorithms for ScalableWireless Internet-Access Mesh Networks Nobuo Funabiki Graduate School of Natural Science and Technology, ... wireless coverage area in a conventional WLAN using a single wireless router (Akyildiz et al., 2005) The wireless mesh network adopts multiple wireless routers that are distributed in the service area, ... several variations of under-studying wireless mesh networks, we have focused on the one targeting the Internet access service, using only access points (APs) as wireless routers, and providing communications

Ngày tải lên: 21/06/2014, 23:20

... throughputs for different traffic patterns 4.6.4 Simulations for different bandwidth limits In our second simulations, the performance for different bandwidth limits is investigated for instance ... clusters for different bandwidth limits 4.6.6 Simulations for random networks In our fourth simulations, the performance for random networks with 50 APs is investigated to evaluate our algorithm ... APs is larger than the minimum one (50 m) Then, the wireless link is generated for any pair of APs within the distance of 110 m representing the wireless range in a free space However, this wireless

Ngày tải lên: 21/06/2014, 23:20

... Architecture for Infrastructure Wireless Mesh Networks Glêdson Elias, Daniel Charles Ferreira Porto and Gustavo Cavalcanti Federal University of Paraíba Brazil 1 Introduction Wireless Mesh Networks ... 2006) and AODV-ST (Ramachandran, K et al., 2005) Trang 2Mesh Router Static Mesh Client Mobile Mesh Client Fig 1 Infrastructure wireless mesh network As evinced in (Chen, J et al., 2006) and (Hossain, ... goals for routing protocols developed for WMNs is to reduce the routing overhead and improve network scalability The WMN’s architecture defines two types of nodes: mesh client (MC) and mesh router

Ngày tải lên: 21/06/2014, 23:20

... – 75) Held, G (2005) Wireless Mesh Networks, Auerbach Publications Hossain, E & Leung, K (2009) Wireless Mesh Networks: ... QoE and QoS in Wireless Mesh Networks IEEE Latin-American ... traditional link-state algorithm for ad hoc networks. OLSR is a proactive protocol Trends and Challenges for Quality of Service and Quality of Experience for Wireless Mesh Networks 131 which uses ... Quality of level support in wireless mesh networks This section discusses the main approaches to assure quality level support for multimedia applications in wireless mesh networks with focus on

Ngày tải lên: 21/06/2014, 23:20

... WMN are Mesh Routers and Mesh Clients Mesh clients form ad hoc sub-networks Mesh routers form the mesh backbone for the mesh clients Each node in WMN could act as a relay, forwarding traffic generated ... 1Administrative Technical Issues in Wireless Mesh Networks Trang 3On the Capacity and Scalability of Wireless Mesh Networks Yonghui Chen Dept of Electronics and Information Engineering of HUST ... However, Wireless mesh network (WMN) has been regarded as an alternative technology for last-mile broadband access, as in fig 1 Fig 1 A typical application of WMN Typical nodes in WMN are Mesh Routers

Ngày tải lên: 21/06/2014, 23:20

... Trang 1Virtual Home Region Multi-hash Location Management Service (VIMLOC) for Large-Scale Wireless Mesh Networks 1 J Mangues-Bafalluy, M Requena-Esteso, J Núñez-Martínez and A Krendzel ... comparison of such schemes neither for ad hoc nor for mesh networks The above analysis motivates our work on a DLM scheme for large-scale WMNs, called VIMLOC, which is described in the following section ... IEEE; “VIMLOC: Virtual Home Region Multi-Hash Location Service in Wireless Mesh Networks”, by Krendzel et al., which appeared in Proc Wireless Days-2008, United Arab Emirates © [2008] IEEE; “Wireless

Ngày tải lên: 21/06/2014, 23:20

... smaller than that of mesh clients Mesh routers constitute a wireless mesh backbone providing a wireless infrastructure for mesh clients In each cell, mesh clients are connected to the mesh router like ... infrastructure wireless mesh networks, ” IEEE Transactions on Mobile Computing, vol 7, no 8, pp 1011–1024, 2008 J Robinson and E W Knightly, “A performance study of deployment factors in wireless mesh networks, ” ... non-asymptotic throughput derivation for WMNs The WMN model indicates that all wireless mesh routers contend for the same wireless channel of capacity W1 in EURASIP Journal on Wireless Communications and...

Ngày tải lên: 21/06/2014, 18:20

... consists of mesh gateways, mesh routers and mesh clients as illustrated in Fig 2.1 [3] The mesh gateways make it possible for WMNs to integrate with any Figure 2.1: Wireless Mesh Networks general ... antenna systems 2.1 Wireless Mesh Networks In this section, we discuss the motivation and characteristics of general WMNs followed by an introduction of MIT Roofnet Wireless mesh networks are a natural ... [3] I F Akyildiz, X Wang, and W Wang Wireless mesh networks: a survey Computer Networks, 47(4):445–487, 2005 [4] J Bicket Bit-rate selection in wireless networks Master’s thesis, MIT, 2005 [5]...

Ngày tải lên: 26/09/2015, 10:59

... decentralized wireless networks, ” IEEE Transactions on Wireless Communications, vol 7, no 12, pp 5408–5419, 2008 [22] M Ebrahimi, M A Maddah-Ali, and A K Khandani, “Throughput scaling laws for wireless networks ... power control for wireless ad hoc networks, ” IEEE Transactions on Wireless Communications, vol 3, no 1, pp 74–85, 2004 [11] I Katzela and M Naghshineh, “Channel assignment schemes for cellular ... in wireless data networks, ” IEEE Transactions on Communications, vol 50, no 2, pp 291–303, 2002 [16] J Huang, R A Berry, and M L Honig, “Distributed interference compensation for wireless networks, ”...

Ngày tải lên: 21/06/2014, 08:20