capacity of ad hoc wireless networks pdf

... Madsen, F H P Fitzek, and R Prasad, “Impact of different mobility models on connectivity probability of a wireless ad hoc network,” in Proceedings of the International Workshop on Wireless Ad-Hoc ... pp 173–219, Addison-Wesley, Reading, Mass, USA, 2001 [2] D B Johnson, D A Maltz, and J Broch, “DSR: the dynamic source routing protocol for multi-hop wireless ad hoc networks,” in Ad Hoc Networking, ... degradation in high-speed conditions 1 Introduction Research has gained a significant advance in the develop-ment of routing protocols for wireless ad hoc networks [1, 2] The movement pattern of

Ngày tải lên: 21/06/2014, 11:20

... probability of its success was established by analyti-cal means The subject of this paper is the effect of the route dis-covery process (RDP) on the throughput capacity of ad hoc networks Previous ... 1 INTRODUCTION In wireless ad hoc networks, the terminals (nodes) commu-nicate without the aid of any infrastructure There are many challenges involved in the design of these networks One par-ticular ... February 2007 Recommended by Ananthram Swami Throughput capacity of large ad hoc networks has been shown to scale adversely with the size of networkn However the need for the nodes to find or repair

Ngày tải lên: 22/06/2014, 19:20

... networks (WLANs) Although often used in practical implementations of mobile ad hoc networks, IEEE 802.11 presents several drawbacks in the context of ad hoc networks, one of them being its poor ... of medium access control (MAC) protocols for ad hoc networks has been dominated by the IEEE 802.11 standard, which was initially implemented in the context of single-hop wireless local area networks ... degradation of IEEE 802.11 in the presence of fading channels has been studied in detail in [5] In this paper, authors quantitatively estimated the degradation of the network throughput due to fading

Ngày tải lên: 21/06/2014, 22:20

... INTRODUCTION An ad hoc wireless network is a special type of wireless net- work that does not have a wired infrastructure to support communication among the wireless nodes. In multi-hop ad hoc networks, ... number of nodes of all three classes is set to 30. The energy capacity of class A nodes, P,is made enough to cover the whole region, the capacity of class BnodesisP/4, and the capacity of class ... environment of wireless networks. There are a lot more works on energy-efficient communi- cation in ad hoc wireless networks, such as in [15, 16]. Sing et al. studied five different metrics of energy-efficient

Ngày tải lên: 22/06/2014, 22:20

... larger the variance of ¯ G is, the higher the rate of increase in the admission capacity is, and the admis- sion capacity in the case of a small variance is greater than in the case of a large variance. ... ex- cess capacity ratio with respect to the thermal noise power. Similar patterns of admission capacity are observed. Figure 7 shows the admission capacity versus the tar- geted excess capacity ... equal regard- less of the value of φ. Figure 11 shows the admission capacity versus the targeted outage ratio with respect to the thermal noise power. Similar patterns of admission capacity are ob-

Ngày tải lên: 22/06/2014, 22:20

... Revised 15 April 2005 Wireless ad hoc sensor networks differ from wireless ad hoc networks from the following perspectives: low energ y, lightweight routing protocols, and adaptive communication ... of routing in ad hoc sensor networks. A lot of development has been seen in ad hoc routing since the introduction of highly dynamic destination-sequenced distance-vector routing (DSDV) [1]. Ad ... route discoveries, which is the most critical part of ad hoc wireless sensor networks. EARP is well suited for sensor networks due to its ability to adapt to the environment and make routing decisions

Ngày tải lên: 23/06/2014, 00:20

... these papers are designed for mobile ad hoc networks but not sensor networks Unlike sensor networks, bat-tery constraint is not a major issue of mobile ad hoc networks Therefore, only few papers ... challenge of the design of wireless sensor networks is the limited energy resource of the battery of the sensors This limited resource restricts the operational time that wireless sen-sor networks ... consid-erations in wireless ad-hoc sensor networks (WASNs): maximizing the amount of data sent between any pair of all sensor nodes until the first sensor node is out of battery As in sensor networks,

Ngày tải lên: 14/12/2017, 17:47

... effective transport capacity of ad hoc dispersed spectrum cognitive radio networks is derived, and the effects of 3D node distribution on the effective transport capacity of ad hoc dispersed spectrum ... sensor networks,” Ad Hoc Networks, vol 7, no 4, pp. 778–790, 2009 [14] G Ferrari, B Baruffini, and O Tonguz, “Spectral efficiency-connectivity tradeoff in ad hoc wireless network,” in Proceed-ings of ... transport capacity perfor-mance analysis of conventional ad hoc wireless networks considering 2D node distribution is conducted in [14] In the current section, this analysis is extended to ad hoc dispersed

Ngày tải lên: 21/06/2014, 05:20

... (one NAL unit/RTP payload), the division of original stream into many RTP substreams leads to an increase of the number of RTP headers To limit the multiplications of header information, the interleaved ... increasing number of communication services The need of interoper-ability between networks is crucial and media adaptation at the entrance of bottleneck links (e.g., wireless networks) is with ... measure of congestion instead of the previous distortion Besides, packet scheduling algorithms can switch between different versions of the streamed video, encoded with different qualities, instead of

Ngày tải lên: 22/06/2014, 01:20

... end-points Because of the nature of ad hoc networks, rout-ing protocols should be highly dynamic and robust Ad hoc routing protocols are often classified regarding its method of finding and maintaining ... size of the ad hoc network has a large impact on its feasibility for these types of scenarios Thus, in our study, we addressed issues associated with typ-ical multimedia networks: connectivity (address ... integrated environments Particularly, it al-lows a better understanding of the inherent limitations of ad hoc wireless networks and of the potentially multiple func-tionalities deployed there This promotes

Ngày tải lên: 22/06/2014, 19:20

... Trang 1Wireless Ad Hoc & Sensor NetworksMedium Access Control Application Transport Protocol WS 2010/2011Network Protocol Media Access Protocol Prof Dr Dieter Hogrefe Dr ... Channel (Radio) Outline • Multiple Access Technique • Designing Issues of MAC protocols • Classification of MAC protocols Classification of MAC protocols • Protocols examples • Characteristics of Link ... Reservation Multiple Access Trang 2Wireless Ad Hoc & Sensor NetworksMedium Access Control Application Transport Protocol WS 2010/2011Network Protocol Media Access Protocol Prof Dr Dieter Hogrefe Dr

Ngày tải lên: 09/07/2014, 08:13

... digital electronics and wireless communications have led to the emergence of ad hoc wireless sensor networks, which consist of a large number of sensing devices that are capable of sensing, processing ... Abstract: Broadcasting is a common and basic operation used to support various network protocols in wireless networks To achieve energy-efficient broadcasting is especially important for ad hoc wireless ... Algorithm for Broadcasting in Ad Hoc Wireless Sensor Networks Naixue Xiong 1,2 , Xingbo Huang 3 , Hongju Cheng 3, * and Zheng Wan 1 1 School of Information Technology, Jiangxi University of Finance

Ngày tải lên: 02/11/2022, 09:22

... Europe provides date rates of up to 2 Mbps Another important technology in the evolution of wireless networks isthe Wireless Local Area Networks (WLANs) In the early days of WLANsindustry-specific ... hadconsiderable problems in delivering packets in the downstream direction evenwhen the nominal capacity of the link was not reached Finally, the thesis discusses the suitability of wireless networks ... of the network on the application-perceivedQuality of Service is of great significance when it comes to customer satisfac-tion Therefore, application-perceived Quality of Service in wireless networksmust

Ngày tải lên: 18/10/2013, 12:15

... as we did using GNU Radio [2] in conjunction with the Universal Software Radio Peripheral (USRP) [1], a low-cost public software radio platform Moreover, the implementation of the in-car system ... capture and analysis of raw sig-nal data For this, we used GNU Radio [2] in con-junction with the Universal Software Radio Peripheral (USRP) [1] GNU Radio is an open source, free software toolkit ... the use of TPMS is not voluntary and they are hard to deactivate Second, wireless is easier to jam or spoof because no physical connection is necessary While spoofing a low tire pressure readings

Ngày tải lên: 23/03/2014, 10:20

... units for other nodes Ad hoc network applications Here are three kinds of applications of the ad hoc concept: ad hoc linking, ad hoc networkingand ad hoc association Ad hoc linking is a feature ... discussion ofsome of the important developments of ad hoc networks with applications and provide aroad map to the contents of the book abstrac-Development of Ad Hoc Networking An ad hoc network ... to provide a plethora of inventions that enable dynamic networking solutions So one may wonder why we need the new term ad hoc networks An ad hoc network is an assembly of wireless devices that

Ngày tải lên: 04/07/2014, 06:20

... standards with wired networks ~ Wireless networks are much more equipment-dependent than wired networks ~ Easier to implement security policies on wired networks Trang 6Effects of Wireless Attacks ... help of freely available tools ways in which a whacker can assess the vulnerability of a firm’s network Trang 7Types of Wireless NetworkThere are four basic types: Trang 8Advantages and Disadvantages ... charge of authentication and is accepting the association of the station: • Unless an add-on authentication system (e.g., Radius) is used ~ MAC address is trusted as giving the correct identity of

Ngày tải lên: 12/07/2014, 23:20

... Trang 1IMPLEMENTATION AND APPLICATIONSOF AD HOC CONSTRAINTS CHENG CHI KAN KENIL NATIONAL UNIVERSITY OF SINGAPORE 2008 Trang 3IMPLEMENTATION AND APPLICATIONSOF AD HOC CONSTRAINTS CHENG CHI KAN KENIL ... as possible, taken into account the efficiency trade-offs This thesis tigates the roles of ad hoc constraints in these four issues inves-An ad hoc constraint is an arbitrary constraint with no ... rules for the game of Life 59 4.2 A8 × 8 board made to 9 × 9 by padding dead cells (shaded) A super-cell is any3 × 3 square of cells A super-row is a 3 × n (here n = 9) rectangle of cells A super-block

Ngày tải lên: 11/09/2015, 09:05

... optimization in ad hoc wireless networks through adaptive control of marginal utility: http:// ieeexplore.ieee.org/xpl/articleDetails.jsp?reload=true&arnumber=655473 3.3 SCADA Systems 9 Trang ... Trang 16SCADA systems have traditionally used combinations of radio and direct serial ormodem connections for communications The remote management or monitoringfunction of a SCADA system is often ... misconfigurations of equipment, and exponentiallygrowing number of vulnerabilities urge for comprehensive research, monitoring,assessment, and testing of the wireless equipment and software One of the most

Ngày tải lên: 05/03/2019, 08:37

... dụ của mạng MANETThuật ngữ “Ad hoc” trong mạng không dây chỉ một mạng không có cơ sở hạ tầng cố định, nơi hình dạng mạng được hình thành bởi các nút mạng Chế độ “Ad hoc” của chuẩn IEEE 802.11 ... nút báo hiệu, lôi kéo các nút S trong vùng lân cận để tạo thành các vùng Phương pháp BEAD nghiên cứu mạng ad hoc phân cấp ba tầng với các nút di động (MN) ở tầng thấp nhất, tiếp theo là các nút ... ‘HeadInfo’ chứa NodeID của mình Nút trung gian có thể loại bỏ gói HeadInfo nếu nó nhận được thông tin về một nút có NodeID lớn hơn, hoặc cập nhật thông tin nút đứng đầu và nhân bản gói ‘HeadInfo’

Ngày tải lên: 11/04/2023, 10:51

... referred to as mobile ad hoc networks (MANETs) [33] or as infrastructure-less wireless networks. 1.2 Mobile Ad Hoc Networks A Mobile Ad hoc NETwork (MANET) is a system of wireless mobile ... and Local Ad Hoc Wireless Networks M arco Conti 2 M ulticasting Techniques in Mobile Ad Hoc Networks X iao Chen and Jie Wu 3 Qualit y of Service in Mobile Ad Hoc Networks ... ower-Conservative Designs in Ad Hoc Wireless Networks Y u-Chee Tseng and Ting-Yu Lin 5 P erformance Analysis of Wireless Ad Hoc Networks A nurag Kumar and Aditya Karnik 6 ...

Ngày tải lên: 03/06/2014, 01:08