A Deficit Round Robin With Fragmentation Scheduler for IEEE
802.16e Mobile WiMAX1,2  Free registration required  Executive
Summary  Deficit Round Robin (DRR) is a fair packet-based
scheduling discipline commonly used in wired networks where link
capacities do not change with time. In wireless networks
especially wireless broadband networks such as IEEE 802.16e
Mobile WiMAX, the link capacity can change over time and also
depends on the user location. Moreover, Mobile WiMAX allows
packet fragmentation which violates the packet-based service
concept of DRR. Therefore, the traditional DRR can not directly
be used in such networks. Therefore, the authors introduce
Deficit Round Robin with Fragmentation (DRRF) to allocate
resources in a fair manner, while allowing for varying link
capacity. Similar to DRR and General Processor Sharing (GPS),
the DRRF achieves perfect fairness. DRRF results in a higher
throughput than DRR while causing less overhead than GPS.    •
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