Cross-layer Packet-dependant OFDM Scheduling Based on Proportional Fairness

Cross-layer Packet Dependent OFDM scheduling based on proportional fairness

This paper assumes each user has more than one queue, derives a new packet dependent proportional fairness power allocation pattern based on the sum of weight capacity and the packet’s priority in users’ queues, and proposes 4 new schemes of cross-layer packet dependent OFDM scheduling for heterogeneous classes of traffic based on proportional fairness. Scenario 1, scenario 2 and scenario 3 lea...

Cross-Layer Proportional Fair Scheduling with Packet Length Constraint in Multiuser OFDM Networks

In this paper, we investigate the proportional fair scheduling (PFS) problem for multiuser OFDM systems, considering the impact of packet length. Packet length influences scheduling schemes in a way that each scheduled packet should be ensured to be completely transmitted within the scheduled frames. We formulate the PFS problem as an optimization problem. Based on the observations on the struc...

Packet-Mode Scheduling with Proportional Fairness for Input-Queued Switches

Input-queued switches are able to overcome head-of-line (HOL) blocking and achieve high throughput by using virtual output queueing (VOQ) and efficient scheduling algorithms. In this case, the buffers and control logic work at the line speed [2], which enables such architecture to be scaled up to backbone routers with very high speed, as realized in Tiny Tera [3], Cisco GSR [4], Lucent GRF [5],...

Cross-layer Packet Scheduling in Mimo Cellular Networks

Adaptive Resource Allocation in Multiuser OFDM Systems with Proportional Fairness

Multiuser orthogonal frequency division multiplexing (MU-OFDM) is a promising technique for achieving high downlink capacities in future cellular and wireless LAN systems. The sum capacity of MU-OFDM is maximized when each subchannel is assigned to the user with the best channel-tonoise ratio for that subchannel, with power subsequently distributed by water-filling. However, fairness among the ...

Vulnerability Evaluation of Proportional Fairness Scheduling to Retransmissions Attacks

Channel aware schedulers of modern wireless networks such as the popular Proportional Fairness Scheduler (PFS) improve throughput performance by exploiting channel uctuations while maintaining fairness among the users. In order to simplify the analysis, PFS was introduced and vastly investigated in a model where frame losses do not occur, which is of course not the case in practical wireless ne...