'Busy tone' diaporamas de présentation

Medium Access Control in Wireless Networks

Medium Access Control in Wireless Networks. Overview. Issues with spectrum sharing Current MAC protocols Power management Rate control Interaction with PHY layer. Medium Access Control. Wireless channel is a shared medium MAC coordinates transmission between users sharing the spectrum

1.07k views • 78 slides

A Survey of Wireless Communications

818 views • 68 slides

Chapter 7 Wireless Ad Hoc Networks

Chapter 7 Wireless Ad Hoc Networks. What is an Ad Hoc Network?. Definitions: An ad-hoc network is one that comes together as needed, not necessarily with any assistance from the existing Internet infrastructure Instant infrastructure

770 views • 67 slides

The research about power control in Our LAB

The research about power control in Our LAB. 2003, 07, 23. Introduction. Single-Channel MAC Protocol with Busy Tones and Power Control (2000) Multi-Channel MAC Protocol with Power Control (2001) Increasing the Throughput of Packet Radio Networks with Power Adjustment (2001)

817 views • 65 slides

Wireless Networking & Mobile Computing CS 752/852 - Spring 2012

Wireless Networking & Mobile Computing CS 752/852 - Spring 2012. Lec #5: Advanced MAC Schemes Dual Busy Tone & Collision Notification. Tamer Nadeem Dept. of Computer Science.

604 views • 51 slides

MAC Protocols for Ad Hoc Wireless Networks

MAC Protocols for Ad Hoc Wireless Networks. Wireless Interference. A radio interface either transmits or receives (half-duplex). A receiver must get a minimum SINR for successful reception This means no other transmitter (interferer) in vicinity. If untrue -> collision (SINR insufficient).

509 views • 35 slides

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/.

895 views • 34 slides

MEDIUM ACCESS CONTROL

MEDIUM ACCESS CONTROL. Wireless channel is a shared medium MAC coordinates transmission between users sharing the spectrum Goals: prevent collisions while maximizing throughput and minimizing delay Why Special MAC needed in Wireless Domain? Why not CSMA/CD?. HIDDEN & EXPOSED TERMINAL.

648 views • 33 slides

Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)

Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: ETRI PHY Proposal for PAC Date Submitted: May 5, 2014 Source : Kapseok Chang, Byung-Jae Kwak, and Moon-Sik Lee and Byung-Jae Kwak (ETRI) Company: ETRI

366 views • 31 slides

Mobile Computing COE 446 Wireless Multiple Access

Mobile Computing COE 446 Wireless Multiple Access. Tarek Sheltami KFUPM CCSE COE ht http://faculty.kfupm.edu.sa/coe/tarek/coe446.htm. Principles of Wireless Networks K. Pahlavan and P. Krishnamurth. CSMA/CA BTMA DSMA. Outline. 802.11b 2.4-5 GHz unlicensed radio spectrum

522 views • 25 slides

A Busy-Tone based MAC Scheme for Wireless Ad Hoc Networks using Directional Antennas

A Busy-Tone based MAC Scheme for Wireless Ad Hoc Networks using Directional Antennas. Hong-Ning Dai, CUHK Kam-Wing Ng, CUHK Min-You Wu, SJTU. GLOBECOM 2007. Outline. Introduction Related work Busy-Tone based Directional MAC (BT-DMAC) Simulation results Conclusion. Introduction.

304 views • 22 slides

Dual Busy Tone Multiple Access (DBTMA) : A Multiple Access Control Scheme for Ad Hoc Networks

Dual Busy Tone Multiple Access (DBTMA) : A Multiple Access Control Scheme for Ad Hoc Networks. Z. Haas and J. Deng IEEE Trans. on Communications June, 2002 This paper completely solves hidden and exposed terminal problems. Key Idea & Goals & Main Results. Key idea:

353 views • 20 slides