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Performance analysis of packet aggregation in wlans with simultaneous multi-user access (work in progress)
Publikationstyp
Conference Paper
Date Issued
2009-05
Sprache
English
First published in
Number in series
5550 LNCS
Start Page
248
End Page
259
Citation
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 5550 LNCS (): 248-259 (2009-07-17)
Contribution to Conference
Publisher DOI
Scopus ID
Publisher
Springer
A cross-layer wireless LAN system is considered which transmits packets for a number of users simultaneously using OFDMA or SDMA transmission. Due to varying packet lengths and physical bitrates for each user, this results in different transmission times so that users with faster transmissions have to wait until the transmission of the slower users is complete. Packet aggregation can reduce the loss of airtime and enhance the throughput without affecting the delay by filling in the gaps with additional packets which are ready for transmission. In this paper, the throughput is determined analytically and by simulation with and without packet aggregation for some given distribution functions of the packet size and the transmission time. For a more realistic channel model, the throughput enhancement due to packet aggregation is determined by simulations. It is shown that dependent on the distribution of the different flows, a significant throughput enhancement can be achieved.
Subjects
Multi-user access
Packet aggregation
Wireless LANs
DDC Class
004: Informatik