'Hidden terminal problem' diaporamas de présentation

COS 461: Computer Networks Course Review (12 weeks in 80 minutes)

COS 461: Computer Networks Course Review (12 weeks in 80 minutes). Spring 2009 (MW 1:30-2:50 in CS 105) Mike Freedman Teaching Assistants: Wyatt Lloyd and Jeff Terrace http://www.cs.princeton.edu/courses/archive/spr09/cos461/. What You (hopefully) Learned in This Course.

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Wireless LANs and IEEE 802.11 MAC

Wireless LANs and IEEE 802.11 MAC. CSE 6590 Winter 2012. Overview. Applications of Wireless LANs. Key application areas: LAN extension cross-building interconnect nomadic access ad hoc networking. Infrastructure Wireless LAN. Ad Hoc Networking.

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Wireless LANs

Wireless LANs. CSE 3213 Fall 2011. Overview. Applications of Wireless LANs. Key application areas: LAN extension cross-building interconnect nomadic access ad hoc networking. Infrastructure Wireless LAN. Ad Hoc Networking. temporary peer -to-peer network (no infrastructure).

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Internet of Things: Wireless Networks

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Wireless Networking Understanding the departure from wired networks, Case study: IEEE 802.11 (WiFi)

Wireless Networking Understanding the departure from wired networks, Case study: IEEE 802.11 (WiFi). Many Motivations for Wireless. Unrestricted mobility / deployability Unplugged from power outlet Significantly lower cost No cable layout, service provision Low maintenance Ease

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Last class

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Exploration of Path Space using Sensor Network Geometry

Exploration of Path Space using Sensor Network Geometry. Ruirui Jiang, Xiaomeng Ban, Mayank Goswami , Wei Zeng , Jie Gao , Xianfeng David Gu Stony Brook University. Prob1: Scalable Multipath Routing. Deliver data using multiple (disjoint) paths Improving throughput Lower delay

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Mobile and Ad hoc Networks

Mobile and Ad hoc Networks. Background of Ad hoc Wireless Networks. Wireless Communication Technology and Research. Ad hoc Routing and Mobile IP and Mobility. Wireless Sensor and Mesh Networks. Student Presentations. Adhoc Wireless MAC. http://web.uettaxila.edu.pk/CMS/SP2012/teAWNms/.

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MANAGEMENT ISSUES FOR WIRELESS SENSOR NETWORKS, AN OVERVIEW:

MANAGEMENT ISSUES FOR WIRELESS SENSOR NETWORKS, AN OVERVIEW:. ruzzelli@ucd.ie. Examples of WSNs applications. environmental data collection: temperature light, humidity, pressure, solar radiation. This network has given biologists new view into the nesting patterns of Storm Petrels. .

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IEEE 802.11 CSMA/CA DCF

IEEE 802.11 CSMA/CA DCF. CSE 6590 Fall 2009. MAC Requirements. To avoid interference among simultaneous transmissions But enable as many non-interfering transmission as possible Maintain fairness among transmissions No centralized coordinators: fully distributed operations

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Hidden Terminal Problem and Exposed Terminal Problem in Wireless MAC Protocols

Hidden Terminal Problem and Exposed Terminal Problem in Wireless MAC Protocols. Networking basics. Medium Access Control (MAC) Protocol. Characteristics of Wireless Networks. Multiplexing : in a mobile and wireless network, the wireless medium is shared by many nodes.

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Hidden Terminal Problem and Exposed Terminal Problem in Wireless MAC Protocols

Hidden Terminal Problem and Exposed Terminal Problem in Wireless MAC Protocols. Networking basics. Medium Access Control (MAC) Protocol. Characteristics of Wireless Networks. Multiplexing : in a mobile and wireless network, the wireless medium is shared by many nodes.

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Chapter 6: Wireless and Mobile Networks

Background: # wireless (mobile) phone subscribers now exceeds # wired phone subscribers! computer nets: laptops, palmtops, PDAs, Internet-enabled phone promise anytime untethered Internet access two important (but different) challenges communication over wireless link

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Robcast: A singlehop reliable broadcast protocol for WSNs

Robcast: A singlehop reliable broadcast protocol for WSNs. Murat Demirbas Srivats Balachandran University at Buffalo, SUNY. Singlehop reliable (?) broadcast. Reliable broadcast is important

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Spectrum Sharing MAC-layer Protocols

Spectrum Sharing MAC-layer Protocols. Sang-Yoon Chang ECE 439 Spring 2010. Motivation. Bandwidth becoming scarcer and more valuable Increased demands on wireless applications Users demand higher performance Dynamically accessing multiple channels can increase spectrum efficiency

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Efficient MAC Protocols for Wireless Sensor Networks

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Date: 2012-01-19

Uplink Throughput Performance of IEEE 80211ah Networks under OBSS Scenarios . Authors:. Date: 2012-01-19. The OBSS Problem. Larger coverage range in IEEE 802.11ah network makes the OBSS problem more pronounced ( limited channels but increased interference area). AP. Abstract.

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Co-operative Adaptive Cruise Control(CACC)

Co-operative Adaptive Cruise Control(CACC). Anirudha U. Bodhankar Roll no. 04329003, MTech04 KReSIT, IIT Bombay. Adaptive Cruise Control. Independent device. Has control over acceleration and breaking. Use sensors to detect vehicle ahead and estimates its velocity.

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Ubiquitous Networks WLAN

Ubiquitous Networks WLAN. Lynn Choi Korea University. Portal. Distribution System. 802.11 - Infrastructure Mode. Terminology Station (STA) Wireless terminals Basic Service Area (BSA) Coverage area of one access point Basic Service Set (BSS) Group of stations controlled by the same AP

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