Delay sensitive scheduling schemes for heterogeneous QoS over wireless networks

TitleDelay sensitive scheduling schemes for heterogeneous QoS over wireless networks
Publication TypeJournal Article
Year of Publication2007
AuthorsHan, Z., X. Liu, J. Z. Wang, and K. J. R. Liu
JournalWireless Communications, IEEE Transactions on
Pagination423 -428
Date Publishedfeb.
Keywordschannel scheduling, delay sensitive scheduling schemes, diversity reception, heterogeneous QoS, modified proportional fairness scheduling schemes, multiuser diversity, quality of service, scheduling, time scheduling, users satisfaction factor, weighted round-robin, wireless channels, wireless networks

Future wireless networks will support the growing demands of heterogeneous and delay sensitive applications. In this paper, a users' satisfaction factor (USF) is defined to quantify quality of service (QoS) for different types of services such as voice, data, and multimedia, as well as for different delay constraints. This USF not only predicts the final delivered QoS during transmission, but also take advantages of the fact that different packets can be decoded at different time in the receivers. Based on this USF, four types of scheduling schemes considering tradeoffs between system performance and individual fairness are proposed. These schemes explore the time, channel, and multi-user diversity to guarantee quality of service and enhance the network performance. From the simulation results, the proposed scheduling schemes achieve different tradeoffs between individual fairness and high system performance for the heterogeneous and delay sensitive applications, compared with the weighted round-robin and the modified proportional fairness scheduling schemes


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