A new cross-layer scheme that combines grey relational analysis with multiple attributes and knapsack algorithms for WiMAX uplink bandwidth allocation

Abstract

To compensate for the adverse effects caused by radio link in worldwide interoperability for Microwave Access (WiMAX) networks, many radio resource management approaches have been present to assign orthogonal frequency division multiplexing access slots for seeking better performance. However, no WiMAX standards for optimal slot allocation have been defined. In this study, a new uplink bandwidth allocation scheme, GRAMA, which combines grey relational analysis with multiple attributes and the knapsack algorithms, is proposed to improve resource utilization while satisfying the user's requirements of throughput and fairness. Channel aware technology and service flow priority are used in the proposed scheme to achieve the highest performance index. A series of simulation is conducted under the scenarios of constant-bit-rate (CBR) voice traffic, variable-bit-rate (VBR) video traffic, and VBR data traffic. The performance is evaluated in terms of bandwidth utilization, transmission throughput, and fairness and simulation result which indicate that the proposed GRAMKA outperforms the conventional fuzzy and knapsack algorithms.

Efficient Resource Management for Uplink Scheduling in IEEE 802.16e Standard

“…The UL scheduling algorithm at the BS should lead its decision with all the SSs whereas the DL channel algorithm is only worried in communicating the decision locally to the BS [7]. But, the UL scheduling algorithm design is a challenging task due to the requirement in different level of QoS classes, fairness and application difficulty [6]. One of the efficient UL hybrid scheduling algorithms is the earliest deadline first (EDF).…”

“…Each SS acts as a router that helps and collaborates directly to transmit the data onto the SSs. The transmission schemes for all setup modes take place through two independent channels, either UL channels (from SS to BS) or downlink (DL) channel (from ASTESJ ISSN: 2415-6698 BS to SS) [5][6]. Note that, the UL channel is shared among all SSs while the BS is only using the DL channel scheme.…”