'Csma' diaporamas de présentation

? 4 ? ??????

? 4 ? ??????. ????? ?????? ?????? ??? ????? ?????. ?????. ????????????????????????????????? ?????????????? ????????????????? ????????????? ??????????????????????? = (N^2-N)/2 ?. ?????. ????????????????????? ?????????? ????????? ?????????????. ?????. ????????

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Medium Access Control

Medium Access Control. Channel Allocation. Static channel allocation in LANs and MANs FDMA, TDMA, CDMA Dynamic channel allocation in LANs and MANs MAC protocols: with collisions, polling, token. Static Channel Allocation. Delay for one fast channel: Delay for multiple FDM slower channels:.

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? 4 ? ???????

? 4 ? ???????. 4.1 ?????. LAN ??? ????? ????? / ???? ??? / ???? ?????????. 4.1 ?????. ??????? ???? ?? ?? ???. 4.1 ?????. ??????? ???? ?? ( ?????? ) ?? ( ???????? ). 4.1 ?????. ??????? ???????? ???????????????? ???? / ???? / ???? / ???? / ???? CSMA/CD CSMA/CA

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Physical Layer

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Random Access Networks

Random Access Networks. CSMA Families. References. Chapter 9 of the book. Throughput Analysis for Persistent CSMA Systems, HIDEAKI TAKAGI AND LEONARD KLEINROCK. IEEE TRANSACTIONS ON COMMUNICATIONS, VOL. COM-33, NO. 7, JULY 1985

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Chapter 3 Network Technologies

Chapter 3 Network Technologies. Local Area Networks. IEEE ????. A LAN (Local Area Network) is a data communication system allowing a number of independent devices to communicate directly with each other, within a moderately sized geographic

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Chapter 6

Multiple Radio Access. Chapter 6. Introduction Contention Protocols ALOHA Slotted ALOHA CSMA (Carrier Sense Multiple Access) CSMA/CD (CSMA with Collision Detection) CSMA/CA (CSMA with Collision Avoidance). Outline. Multiple access control channels

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Chapter 12. Multiple Access

Chapter 12. Multiple Access. Random Access Controlled Access Channelization. Data Link Layer: Two sublayers. Data link layer divided into two functionality-oriented sublayers IEEE made this division for LANs. Medium Access Protocols. Random Access.

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Chapter 12. Multiple Access

Chapter 12. Multiple Access. Random Access Controlled Access Channelization. Data Link Layer: Two sublayers. Data link layer divided into two functionality-oriented sublayers IEEE made this division for LANs. Medium Access Protocols. Random Access.

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Chapter 13

Chapter 13. Multiple Access. Figure 13.1 Multiple-access protocols. 13.1 Random Access. MA. CSMA. CSMA/CD. CSMA/CA. Figure 13.2 Evolution of random-access methods. Figure 13.3 ALOHA network. Figure 13.4 Procedure for ALOHA protocol. Figure 13.5 Collision in CSMA.

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Introduction to Wireless Networks

Introduction to Wireless Networks. Michalis Faloutsos. IEEE 802.11 Wireless LAN - 1. Wireless LANs: untethered (often mobile) networking IEEE 802.11 standard: MAC protocol unlicensed frequency spectrum: 900Mhz, 2.4Ghz. IEEE 802.11 Wireless LAN - 2.

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CSE 461: Multiple Access Networks

CSE 461: Multiple Access Networks. This Lecture. Key Focus: How do multiple parties share a wire? This is the Medium Access Control (MAC) portion of the Link Layer Examples of access protocols: Aloha CSMA variants Classic Ethernet Wireless. Application. Presentation. Session.

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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: Provision of multiple grades of quality for the IEEE 802.15.4e Date Submitted: Sep., 2008 Source: Seong-Soon Joo, Anseok Lee, Chang-Sub Shin, Wun-Cheol Jeong, Jong-Suk Chae Company: ETRI

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HomeRF

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ECSE-4730: Computer Communication Networks (CCN)

ECSE-4730: Computer Communication Networks (CCN). Chapter 5: The Data Link Layer - 3 Shivkumar Kalyanaraman: shivkuma@ecse.rpi.edu Biplab Sikdar: sikdab@rpi.edu http://www.ecse.rpi.edu/Homepages/shivkuma. Ethernet Switches - 1. layer 2 (frame) forwarding, filtering using LAN addresses

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Medium Access Control Protocols, Local Area Networks, and Wireless Local Area Networks

Medium Access Control Protocols, Local Area Networks, and Wireless Local Area Networks. Lecture Note 10. Medium Access Control Protocols and Local Area Networks. Part I: Medium Access Control Part II: Local Area Networks Part III: Wireless Local Area Networks.

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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: [ Data rate availability in 433MHz with in Japanese RR ] Date Submitted: [17 May, 2010] Source: [Masashi Shimizu] Company [NTT] Address [239-0847 1-1 Hikarinooka Yokosuka Japan]

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IEEE 802.11 Wireless LAN

802.11b 2.4-5 GHz unlicensed radio spectrum up to 11 Mbps direct sequence spread spectrum (DSSS) in physical layer all hosts use same chipping code widely deployed, using base stations. 802.11a 5-6 GHz range up to 54 Mbps 802.11g 2.4-5 GHz range up to 54 Mbps

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IEEE 802.11 Wireless LAN

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