MAC seminar

Comparison of MAC protocols in wired systems and wireless systems Mridula Sharma 19.07.2010 Comparison of MAC protocols in wired systems and wireless systems

Outline ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Comparison of MAC protocols in wired systems and wireless systems

Introduction ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Comparison of MAC protocols in wired systems and wireless systems ,[object Object],[object Object],[object Object],[object Object]

Introduction Comparison of MAC protocols in wired systems and wireless systems

Introduction Functions of MAC layer Comparison of MAC protocols in wired systems and wireless systems ,[object Object],[object Object],[object Object]

Multiple Access Protocols ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Comparison of MAC protocols in wired systems and wireless systems

ALOHA ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Comparison of MAC protocols in wired systems and wireless systems

Pure ALOHA ,[object Object],[object Object],[object Object],[object Object],Comparison of MAC protocols in wired systems and wireless systems Fig. : Frames transmitted at completely random intervals

Pure ALOHA- Efficiency ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Comparison of MAC protocols in wired systems and wireless systems

Slotted ALOHA Comparison of MAC protocols in wired systems and wireless systems ,[object Object],[object Object],Fig. : Throughput versus offered traffic for ALOHA systems

Carrier Sense Multiple Access (CSMA) Comparison of MAC protocols in wired systems and wireless systems ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Comparison of MAC protocols in wired systems and wireless systems Fig. : Comparison of channel utilization versus load for various random access protocols

CSMA with Collision Detection (CSMA/CD) Comparison of MAC protocols in wired systems and wireless systems ,[object Object],[object Object],[object Object],Fig. : CSMA/CD can be in one of the three states: Contention, Transmission or Idle .

Collision Free Protocols Comparison of MAC protocols in wired systems and wireless systems ,[object Object],[object Object]

Limited Contention Protocols Comparison of MAC protocols in wired systems and wireless systems ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Limited-Contention Protocols The Adaptive Tree Walk Protocol Comparison of MAC protocols in wired systems and wireless systems

Wavelength Division Multiple Access Protocols Comparison of MAC protocols in wired systems and wireless systems ,[object Object],[object Object],Fig. : Wavelength Division Multiple Access

Ethernet Comparison of MAC protocols in wired systems and wireless systems ,[object Object],[object Object],[object Object],[object Object]

802.3 Frame Layout Comparison of MAC protocols in wired systems and wireless systems ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Wireless Networks Comparison of MAC protocols in wired systems and wireless systems ,[object Object],[object Object]

Wireless LAN Requirements Comparison of MAC protocols in wired systems and wireless systems ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Problems Comparison of MAC protocols in wired systems and wireless systems ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Multiple Access with Collision Avoidance (MACA) Comparison of MAC protocols in wired systems and wireless systems ,[object Object],[object Object],[object Object],[object Object],[object Object]

MACA for Wireless (MACAW) Comparison of MAC protocols in wired systems and wireless systems ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Wireless LANs MAC Sublayer Comparison of MAC protocols in wired systems and wireless systems ,[object Object],[object Object]

Wireless LANs MAC Sublayer Comparison of MAC protocols in wired systems and wireless systems ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

CSMA/CA Ethernet-like Comparison of MAC protocols in wired systems and wireless systems ,[object Object],[object Object],[object Object],[object Object],[object Object]

Comparison of MAC protocols in wired systems and wireless systems Fig. : IEEE 802.11 Medium Access Control Logic

CSMA/CA- MACAW Comparison of MAC protocols in wired systems and wireless systems ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

CSMA/CA- point Coordination Comparison of MAC protocols in wired systems and wireless systems ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Comparison of MAC protocols in wired systems and wireless systems Fig. : IEEE 802.11 Protocol Architecture

802.11 MAC Frame Layout Comparison of MAC protocols in wired systems and wireless systems ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

802.11 MAC Frame Layout Comparison of MAC protocols in wired systems and wireless systems ,[object Object],[object Object],[object Object],[object Object],Note : 802.11 supports encryption at MAC level, Ethernet does not !!!

Broadband Wireless Comparison of MAC protocols in wired systems and wireless systems Goal : Use wireless connection between buildings i.e. avoiding the use of the local loop ,[object Object],[object Object],[object Object],[object Object],WiMAX (World Interoperability for Microwave Access) is a family of IEEE 802.16 aiming at replacing ADSL and cable modems

Broadband Wireless Comparison of MAC protocols in wired systems and wireless systems ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Fig. : TDD frame contatinig time slots

Broadband Wireless- 802.16 Frame Structure Comparison of MAC protocols in wired systems and wireless systems Fig. : (a) a generic frame (b) a bandwidth request frame ,[object Object],[object Object],[object Object],[object Object]

Wireless Sensor Networks Zigbee Comparison of MAC protocols in wired systems and wireless systems ,[object Object],[object Object],[object Object]

Conclusion Comparison of MAC protocols in wired systems and wireless systems

Comparison of MAC protocols in wired systems and wireless systems Fig: Channel allocation methods and systems for a common channel

Conclusion Comparison of MAC protocols in wired systems and wireless systems ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Conclusion Comparison of MAC protocols in wired systems and wireless systems ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

References ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Comparison of MAC protocols in wired systems and wireless systems

Thank You!!! Any Questions??? Comparison of MAC protocols in wired systems and wireless systems

MAC seminar

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