spaper07_slides - Performance Evaluation of the IEEE 802.16...

Info iconThis preview shows pages 1–10. Sign up to view the full content.

View Full Document Right Arrow Icon
Performance Evaluation of the IEEE 802.16 MAC for QoS Support Claudio Cicconetti, Alessandro Erta, Luciano Lenzini, and Enzo Mingozzi Presented by : Avanti Chimote Sarvesh Singh
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Motivation 802.16:- Standard for Broadband Wireless communication in MAN. Increase in growth of Multimedia Applications like VoIP, Video Conferencing. Hence to meet QoS Requirements, Scheduling services are provided by 802.16 This paper is aimed to state the effectiveness of these services via simulation.
Background image of page 2
802.16 MAC(WiMAX) 2 modes of sharing wireless medium. Mesh Point to Multipoint(PMP) PMP mode Cellular Structure of BS(Base Station) and SS(Subscriber Station) Co-ordinated by BS as opposed to Mesh where it is distributed
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
PMP Mode Uplink(from SS to BS) Downlink (from BS to SS) FDD – Frequency Division Duplex Full Duplex
Background image of page 4
Terminologies UL-MAP and DL-MAP:- Start and End times of uplink and downlink grants Physical Preambles for Synchronization SDU(Service Data units) converted into PDU(Protocol data units)
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
UL-MAP and DL-MAP Base Station (BS) Subscriber Station (SS1) 4 1 2 3 5 Send Physical Preamble Request the bandwidth as per data arrival rate of SDU Grant bandwidth Resend Physical Preamble Communication process
Background image of page 6
Data Transfer from SS Hybrid nature of request/grant mechanism Local distribution of Grant at SS Backlog Incremental Aggregate Based on this, several Bandwidth request mechanisms are propsosed. unsolicited requests, unicast polls, broadcast/multicast polls piggybacking
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Scheduling Services UGS(Unsolicited Grant Service) Real time applications with strict delay requirements Fixed size data packets at periodic intervals Base period and Grant size are pre-decided in connection phase rtPS(Real Time polling service) Real time applications with less stringent delay requirements Variable size data packets at periodic intervals Unicast polling by BS Eg: MPEG Video
Background image of page 8
Scheduling services (contd.) nrtPS(non-real-time Polling Service)
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 10
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 44

spaper07_slides - Performance Evaluation of the IEEE 802.16...

This preview shows document pages 1 - 10. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online