3.Medium Access Control

•Download as PPT, PDF•

7 likes•7,415 views

Medium access control (MAC) is the sublayer of the data link layer that coordinates use of a shared medium in wireless networks. It addresses problems like hidden and exposed terminals through techniques like carrier sense multiple access (CSMA) and time division multiple access (TDMA). TDMA divides time into slots and assigns slots to different users to avoid collisions. Early random access protocols like Aloha and slotted Aloha had low throughput due to many collisions, while later protocols use RTS/CTS handshaking and carrier sensing to reduce collisions and improve throughput.

Why is special MAC required? ,[object Object],[object Object]

Multiple Access Techniques ,[object Object],[object Object],[object Object],[object Object]

Algorithms in TDMA ,[object Object],[object Object],[object Object],[object Object],[object Object]

(Contd.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

(Contd.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

(Contd.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

(Contd.) ,[object Object],[object Object],[object Object],[object Object],[object Object]

(Contd.) ,[object Object],[object Object],[object Object],[object Object]

The network layer is responsible for routing packets from the source to destination. The routing algorithm is the piece of software that decides where a packet goes next (e.g., which output line, or which node on a broadcast channel).For connectionless networks, the routing decision is made for each datagram. For connection-oriented networks, the decision is made once, at circuit setup time. Routing Issues The routing algorithm must deal with the following issues: Correctness and simplicity: networks are never taken down; individual parts (e.g., links, routers) may fail, but the whole network should not. Stability: if a link or router fails, how much time elapses before the remaining routers recognize the topology change? (Some never do..) Fairness and optimality: an inherently intractable problem. Definition of optimality usually doesn't consider fairness. Do we want to maximize channel usage? Minimize average delay? When we look at routing in detail, we'll consider both adaptive--those that take current traffic and topology into consideration--and nonadaptive algorithms.

Transmission Control Protocol (TCP)

k33a

Data link layer

Mukesh Chinta

Multiple Access Protocal

tes31

Packet radio protocol

Priya Kaushal

Computer Networks Unit 1 Introduction and Physical Layer

Dr. SELVAGANESAN S

Carrier-sense multiple access with collision detection (CSMA/CD) is a media access control method used most notably in early Ethernet technology for local area networking.Carrier-sense multiple access with collision detection is a media access control method used most notably in early Ethernet technology for local area networking. It uses carrier-sensing to defer transmissions until no other stations are transmitting.

Packet switchingasimnawaz54

Chapter 4 data link layer

Naiyan Noor

Distance Vector Routing Protocols

KABILESH RAMAR

InternetworkingRaghu nath

Lecture 6

Joe Christensen

unit 3 Multiple Access.ppt

zmulani8

What's hot

Mobile computing (Wireless) Medium Access Control (MAC)

Jyothishmathi Institute of Technology and Science Karimnagar

Congestion control

Aman Jaiswal

Routing algorithm

TechStudent1

Mobile computing unit2,SDMA,FDMA,CDMA,TDMA Space Division Multi Access,Frequ...

Pallepati Vasavi

IT8602 Mobile Communication - Unit I Introduction

pkaviya

Classification of routing protocols

Menaga Selvaraj

Multiple access techniques

Bibhu Prasad

TCP and UDP

Ramesh Giri

IEEE 802.11 Architecture and Services

Sayed Chhattan Shah

The medium access sublayerLal Bahadur Gehlot

Wireless networking_ASRao

Balaji Institute of Engineering & Sciences

Spread spectrumManish Srivastava

Unit 2

Assistant Professor

Multiple access techniques for wireless communication

Dr.Umadevi V

Transport layer

Mukesh Chinta

CSMA /CD PPT ON SLIDESHARE

Khushboo Pal

Packet switchingasimnawaz54

Chapter 4 data link layer

Naiyan Noor

Distance Vector Routing Protocols

KABILESH RAMAR

InternetworkingRaghu nath

What's hot (20)

Mobile computing (Wireless) Medium Access Control (MAC)

Congestion control

Routing algorithm

Mobile computing unit2,SDMA,FDMA,CDMA,TDMA Space Division Multi Access,Frequ...

IT8602 Mobile Communication - Unit I Introduction

Classification of routing protocols

Multiple access techniques

TCP and UDP

IEEE 802.11 Architecture and Services

The medium access sublayer

Wireless networking_ASRao

Spread spectrum

Unit 2

Multiple access techniques for wireless communication

Transport layer

CSMA /CD PPT ON SLIDESHARE

Packet switching

Chapter 4 data link layer

Distance Vector Routing Protocols

Internetworking

Similar to 3.Medium Access Control

Lecture 6

Joe Christensen

unit 3 Multiple Access.ppt

zmulani8

M.A.C (Medium Access Control)

JaironLanda

Ea 452 chap9

Ritika Khanna

MultipleAccess.ppt

Jayaprasanna4

Multiple access procedures

abishajesus

Wireless & Mobile Lecture # 18Bit Hacker

Chapter 7 multiple access techniquesKaushal Kabra

Multiple Access in Computer Network

Hitesh Mohapatra

Error Detection and correction: Types of Errors, Error Detection mechanism (Linear codes, CRC, Checksum), Error Correction mechanism: Hamming Encoding. Data Link Control and Protocols: Flow and Error Control, Stop-and-Wait ARQ. Go-Back-N ARQ, Selective Repeat ARQ, HDLC and Point-to-Point Protocol Multiple Access: Random Access (ALOHA, CSMA, CSMA/CD, CSMA/CA), Controlled Access (Polling, Reservation, Token Passing), Channelization (FDMA, TDMA, CDMA). Wired LANs (Ethernet): Traditional Ethernet, Fast Ethernet, Gigabit Ethernet.

Embedded System serial Communication.ppt

vipulkondekar

7 multiplexingHattori Sidek

AIU_CN_2.pptx

GasanBaalbaky

9 multiple accessampas03

Multiple access techniques for wireless communications

METHODIST COLLEGE OF ENGG & TECH

multiple access for wireless mobile communications

METHODIST COLLEGE OF ENGG & TECH

MEDIUM ACCESS CONTROL

junnubabu

In the seven-layer OSI model of computer networking, media access control (MAC) data communication protocol is a sublayer of the data link layer (layer 2). The MAC sublayer provides addressing and channel access control mechanisms that make it possible for several terminals or network nodes to communicate within a multiple access network that incorporates a shared medium, e.g. an Ethernet network. The hardware that implements the MAC is referred to as a media access controller. The MAC sublayer acts as an interface between the logical link control (LLC) sublayer and the network's physical layer. The MAC layer emulates a full-duplex logical communication channel in a multi-point network. This channel may provide unicast, multicast or broadcast communication service.

Mac

Mahesh Kumar Attri

Carrier-sense multiple access with collision detection (CSMA/CD)

university of Malakand Dir Lower

10 high speedla-nsHattori Sidek

multiple access in wireless communication

panditadesh123

Similar to 3.Medium Access Control (20)

Lecture 6

unit 3 Multiple Access.ppt

M.A.C (Medium Access Control)

Ea 452 chap9

MultipleAccess.ppt

Multiple access procedures

Wireless & Mobile Lecture # 18

Chapter 7 multiple access techniques

Multiple Access in Computer Network

Embedded System serial Communication.ppt

7 multiplexing

AIU_CN_2.pptx

9 multiple access

Multiple access techniques for wireless communications

multiple access for wireless mobile communications

MEDIUM ACCESS CONTROL

Mac

Carrier-sense multiple access with collision detection (CSMA/CD)

10 high speedla-ns

multiple access in wireless communication

3.Medium Access Control

Recommended

Recommended

More Related Content

What's hot

What's hot (20)

Similar to 3.Medium Access Control

Similar to 3.Medium Access Control (20)

More from Sonali Chauhan

More from Sonali Chauhan (20)

3.Medium Access Control