'Pure aloha' diaporamas de présentation

Chapter 5

Chapter 5. The Medium Access Sublayer. The Medium Access Layer. 5.1 Channel Allocation problem - Static and dynamic channel allocation in LANs & MANs 5.2 Multiple Access Protocols - ALOHA, CSMA, CSMA/CD, Collision-free protocols, Limited-contention protocols, Wireless LAN protocols

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The Medium Access Control Sublayer

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The Medium Access Control Sublayer

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UNIT IV DATA LINK LAYER

UNIT IV DATA LINK LAYER. Medium Access Control Techniques A mechanism which provides a link with reliable communication. There is an available dedicated link(or channel) between the sender and the receiver.

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Chapter 4

Chapter 4. The Medum Access Sublayer. MA Sublayer. Additional Reference Local and Metropolitan Area Networks , William Stallings, Prentice Hall, 2000, 6th ed. Networks could be point to point or broadcast. Key issue : who gets access to the (single) channel when there is competition

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CSC 335 Data Communications and Networking

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CEN 4500 Data Communications

CEN 4500 Data Communications. Chapter 4: The Medium Access Control Sublayer. Instructor: S. Masoud Sadjadi http://www.cs.fiu.edu/~sadjadi/Teaching/ sadjadi At cs Dot fiu Dot edu. Recap. Networks are divided into two categories Point-2-point connections (WANs)

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Lecture Focus:

Lecture Focus:. Data Link Layer Media Access Control ( MAC ). CSCS 311. Data Communications and Networking. Lecture 23. Media Access Control. Two sub-layers of data link layer: The upper sub-layer is responsible for data link control

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Wireless Application Protocol

Wireless Application Protocol. Random Assignment Protocols. Random Assignment Protocols.

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Data link layer divided into two functionality-oriented sublayers

Data link layer divided into two functionality-oriented sublayers. RANDOM ACCESS.

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The Medium Access Control Sublayer

The Medium Access Control Sublayer. Chapter 4. The Channel Allocation Problem. Static Channel Allocation in LANs and MANs Dynamic Channel Allocation in LANs and MANs. Dynamic Channel Allocation in LANs and MANs. Station Model. Single Channel Assumption. Collision Assumption.

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Part 3: The Medium Access Control Sublayer

Part 3: The Medium Access Control Sublayer. Summary. Part A Functions The problem Where are we now? The Channel Allocation Problem Part B Dynamic Channel Allocation Technologies ALOHA Protocols CSMA CSMA/CD (old ETHERNET) Switching (Fast ETHERNET) Wireless LANS. Part A: Functions.

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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 12 Multiple Access

Chapter 12 Multiple Access. Figure 12.1 Data link layer divided into two functionality-oriented sublayers. Figure 12.2 Taxonomy of multiple-access protocols discussed in this chapter. 12-1 RANDOM ACCESS.

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Chapter 4

Chapter 4. The Medum Access Sublayer. MA Sublayer. Additional Reference Local and Metropolitan Area Networks , William Stallings, Prentice Hall, 2000, 6th ed. Networks could be point to point or broadcast. Key issue : who gets access to the (single) channel when there is competition

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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: TG4a (UWB)2-MAC proposal for UWB-LDR wireless networks Date Submitted: November 15, 2005 Source: G.M. Maggio (ST) & L. De Nardis, M.-G. di Benedetto (U. di Roma)

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