In order to grapple with the continuously increasing demand on the multimedia traffic over high speed wireless LAN, we need a QoS-oriented MAC for wireless multimedia system.
The IEEE 802.11's PCF is an optional capability, which is connection-oriented, and provides contention-free service, but some papers have proved that it is not efficient when use PCF to transmit voice. And there are no any efficient bandwidth allocation scheme for more high bandwidth requirement source like video in PCF.
In this thesis, we will propose a efficient centralized scheduled access MAC approach in IEEE 802.11 to satisfy heterogeneous traffic mix. There are two main algorithms to achieve the goal, queue management algorithm for downlink and uplink to satisfy video traffic's high bandwidth requirement, polling list management method enhance the efficiency of the polling scheme for transmitting voice traffic.
We evaluate the system performance by the network simulator OPNET, we use the MPEG-1 and ITU G.711 PCM standard as the video and voice traffic . The result shows that the centralized scheduled access MAC approach we propose has excellent efficient and compelling performance.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0718100-150912 |
| Date | 18 July 2000 |
| Creators | Wu, Being-Eing |
| Contributors | Li-Ming Tsung, Chy-Nan Chen, Chu-Sing Yang |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | English |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0718100-150912 |
| Rights | unrestricted, Copyright information available at source archive |
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