'Contention window' diaporamas de présentation

ISSUES IN WIRELESS MAC PROTOCOLS

ISSUES IN WIRELESS MAC PROTOCOLS. Mohit Virendra Peng Lin Vidhya Seran. OUTLINE. MAC Fairness in Wireless Ad-Hoc Networks MAC Fairness in Wireless Cellular Networks Power Controlled Multiple Access Protocol for Wireless Ad-Hoc Networks. Why Mac Fairness?.

1.05k views • 75 slides

Adaptive Packet Reservation Protocols

Adaptive Packet Reservation Protocols. ??? ?? ???????? ???. O UTLINE. An Overview of IEEE 802.11 Legacy 802.11 ? DCF ( Distributed coordination function ) PCF ( Point coordination function ) QoS S upport M echanisms of 802.11e ? EDCF ( Enhanced DCF ) HCF controlled channel access.

707 views • 61 slides

Chapter 12 Multiple Access

1.12k views • 54 slides

Chapter 04 IEEE 802.11 Media Access Control

Chapter 04 IEEE 802.11 Media Access Control. Faculty of Computer Sciense and Engineering. Objectives. Describe and apply the following concepts surrounding WLAN frames - Terminology Review: Frames, Packets, and Datagrams - Terminology Review: Bits, Bytes, and Octets

669 views • 54 slides

Balancing Uplink and Downlink Delay of VoIP Traffic in 802.11 WLANs

Balancing Uplink and Downlink Delay of VoIP Traffic in 802.11 WLANs. Sangho Shin Henning Schulzrinne Columbia University Department of Computer Science. Motivation. VoIP in IEEE 802.11 WLANs. Distribution Network (DS). Access Point (AP). STAs. 1/30. Motivation.

597 views • 49 slides

MAC Research Highlight

423 views • 42 slides

MAC Research Highlight

426 views • 42 slides

Throughput Enhancement in Wireless LANs via Loss Differentiation

Throughput Enhancement in Wireless LANs via Loss Differentiation. Michael Krishnan, Avideh Zakhor Department of Electrical Engineering and Computer Sciences U.C. Berkeley September 9, 2009. Overview. Background Type of loss in wireless networks Estimating collision probabilities

507 views • 38 slides

Compressing Backoff in CSMA Networks

Compressing Backoff in CSMA Networks. University of Illinois (UIUC). Mahanth Gowda. Srihari Nelakuditi. Nirupam Roy. Presented by: Mo Li. Romit Roy Choudhury. University of South Carolina. University of Illinois (UIUC). University of Illinois (UIUC). Nanyang Technological University.

383 views • 36 slides

Qingjiang Tian and Edward J. Coyle Center for Wireless Systems and Applications ( CWSA )

SOSBRA: A MAC-Layer Retransmission Algorithm Designed for the Physical-Layer Characteristics of Clustered Sensor Networks. Qingjiang Tian and Edward J. Coyle Center for Wireless Systems and Applications ( CWSA ) School of Electrical and Computer Engineering Purdue University

412 views • 34 slides

QoS in IEEE 802.11 Networks

QoS in IEEE 802.11 Networks. Resources. Introduction. IEEE 802.11. Simple, Effective Designed for Best Effort Service Real Time Services: Throughput and Delay Sensitive End-to-End QoS Guarantees, IEEE 802.11e. IEEE 802.11 Architecture. ESS. Existing Wired LAN. AP. AP. STA. STA. STA.

589 views • 33 slides

M. Heusse, F. Rousseau, R. Guillier, and A. Duda LSR-IMAG, Grenoble, France

Idle Sense: An Optimal Access Method for High Throughput and Fairness in Rate Diverse Wireless LANs. M. Heusse, F. Rousseau, R. Guillier, and A. Duda LSR-IMAG, Grenoble, France In proceedings of SIGCOMM 2005. Presented by Chaegwon Lim. Idle Sense.

272 views • 27 slides

Mobile Ad hoc Networks COE 549 Random Access I

Mobile Ad hoc Networks COE 549 Random Access I. Tarek Sheltami KFUPM CCSE COE http://faculty.kfupm.edu.sa/coe/tarek/coe549.htm. Outline. Medium Access Control Protocols ALOHA BTMA CSMA Some simulation results. Medium Access Control.

439 views • 26 slides

A Multichain Backoff Mechanism for IEEE 802.11 WLANs

411 views • 25 slides

802.11 Specification overview

802.11 Specification overview. 802.11 Specifications. LLC. MAC Mgmt Service Interface. MAC Service Interface. LLC. MAC sublayer. MAC Layer Management. MAC Mgmt. WEP. MAC. MIB. PHY Service Interface. PHY Mgmt Service Interface. PLCP Sublayer. PHY. PHY layer Management. FH.

303 views • 23 slides

Multi-Class QoS in 802.11 Networks Using GDMC

323 views • 22 slides

VDCF Presentation

VDCF Presentation. Greg Chesson, greg@atheros.com Wim Diepstraten, wdiepstraten@agere.com Maarten Hoeben, Maarten.Hoeben@intersil.com Aman Singla, aman@atheros.com Harold Teunissen, hteunissen@lucent.com Menzo Wentink, menzo.wentink@intersil.com. VDCF Overview.

329 views • 21 slides

Channel Contention with a Large Number of Devices

Channel Contention with a Large Number of Devices. Date: 2011-07-14. Authors:. Abstract.

334 views • 18 slides

Collision Avoidance and Resolution Multiple Access with Transmission Groups

260 views • 15 slides