localization in the wireless sensor networks

localization in the wireless sensor networks

localization in the wireless sensor networks

... hiệu quả cho các quá trình ra quyết định. 9 Đồ án 2 Localization in the wireless sensor networks 10 Đồ án 2 Localization in the wireless sensor networks CHƯƠNG II. ỨNG DỤNG MẠNG CẢM BIẾN KHÔNG DÂY 2.1 ... TRONG ĐỊNH VỊ 17 Đồ án 2 Localization in the wireless sensor networks Hình 3.1 Định nghĩa của các loại nút và tọa độ tương đối 18 Đồ án 2 Localization...

Ngày tải lên: 27/05/2014, 11:41

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SECURITY IN WIRELESS SENSOR NETWORKS – IMPROVING THE LEAP PROTOCOL pptx

SECURITY IN WIRELESS SENSOR NETWORKS – IMPROVING THE LEAP PROTOCOL pptx

... Wireless sensor networks usually consist of a single or multiple base stations acting as points of centralized control, whereby they provide access to other networks. These networks are unique in their ... main purpose of these nodes is to gather information or events occurring from their targets. The main functions associated with sensor nodes include: collecting informatio...

Ngày tải lên: 05/03/2014, 23:20

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Event-to-Sink Reliable Transport in Wireless Sensor Networks docx

Event-to-Sink Reliable Transport in Wireless Sensor Networks docx

... reporting frequency rate used by the sensor nodes sending their read- ings to the sink in the decision interval . The variation of the Fig. 2. Observed event distortion for varying reporting frequency ... carry the same Event ID, then there is a single event oc- currence in the wireless sensor field as shown in Fig. 1. In this case, the sink achieves the desired...

Ngày tải lên: 16/03/2014, 19:20

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On the Lifetime of Wireless Sensor Networks

On the Lifetime of Wireless Sensor Networks

... containing all nodes covering the point x at any time during the time interval [t − t, t] σ (t, x) gives a set containing all connected nodes covering the point x at any time during the time interval ... extent. Combining the lifetime measures from the different parts can be done similarly to the combining of the single criteria, for example by using the minimum. 5. APPLIC...

Ngày tải lên: 28/04/2014, 13:38

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The Impact of Spatial Correlationon Routing with Compressionin Wireless Sensor Networks

The Impact of Spatial Correlationon Routing with Compressionin Wireless Sensor Networks

... values. In this figure, D = n = 105 and the near-optimal cluster size obtained from Theorem 4.1, s no = 14 is indicated by the vertical line in the plot. Intersections of the dotted lines and the ... and (c) show the performance of the clustering for the different power levels. For lower power, there is an increase in the routing cost since links become more lossy. Howe...

Ngày tải lên: 28/04/2014, 13:41

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The Impact of Spatial Correlationon Routing with Compressionin Wireless Sensor Networks

The Impact of Spatial Correlationon Routing with Compressionin Wireless Sensor Networks

... values. In this figure, D = n = 105 and the near-optimal cluster size obtained from Theorem 4.1, s no = 14 is indicated by the vertical line in the plot. Intersections of the dotted lines and the ... and (c) show the performance of the clustering for the different power levels. For lower power, there is an increase in the routing cost since links become more lossy. Howe...

Ngày tải lên: 28/04/2014, 13:41

33 299 0
WIRELESS  SENSOR NETWORKS

WIRELESS SENSOR NETWORKS

... ðại Học Quốc Gia Thành Phố Hồ Chí Minh Trường ðại Học Bách Khoa Thành Phố Hồ Chí Minh Khoa ðiện-ðiện Tử Bộ Môn Viễn Thông  WIRELESS SENSOR NETWORKS Kỹ Thuật, Giao Thức và ... (single-hop) giữa các node , dùng giao thức ñịnh tuyến tỉnh. Hình 2.1: Dạng 1 WSNs , liên kết multipoint-to-point, multihop dùng ñịnh tuyến ñộng ðại Học Bách Khoa TPHCM Wireless S...

Ngày tải lên: 25/04/2013, 19:19

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C-MAC: Model-driven Concurrent Medium AccessControl for Wireless Sensor Networks

C-MAC: Model-driven Concurrent Medium AccessControl for Wireless Sensor Networks

... noise and the signals from both the sender and jammers. Therefore, the strength of interfering signals cannot be obtained from the RSS of collided packets. In order to obtain the SINR at the receiver, ... ongoing transmissions in the vicinity are not significantly affected by the increased interference. If the check is passed, the node obtains the level of interferenc...

Ngày tải lên: 01/09/2013, 15:23

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Tài liệu Wireless Sensor Networks (P2) docx

Tài liệu Wireless Sensor Networks (P2) docx

... Bách Khoa TPHCM Wireless Sensor Networks Bộ Môn Viễn Thông Kỹ Thuật,Giao Thức và Ứng Dụng 42 Chương 5 GIAO THỨC ðIỀU KHIỂN TRUY CẬP TRONG MẠNG WIRELESS SENSOR NETWORKS Mạng ... mang thông ñiệp xin cấp khe thời gian ñể phát dữ liệu. Thông ñiệp thường nhỏ hơn gói dữ liệu, gọi là minislots. Khi một trạm có dữ liệu ñể ðại Học Bách Khoa TPHCM Wireless Sensor...

Ngày tải lên: 21/01/2014, 04:20

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