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Details van artikel 17 van 39 gevonden artikelen
| Titel: |
Cross Layer Scheduling Algorithms for Different Rate Traffic in OFDM Broadband Wireless Systems |
| Auteur: |
Haiying Julie Zhu Roshdy H.M. Hafez John Sydor |
| Verschenen in: |
International journal of computer networks & communications |
| Paginering: | Jaargang 1 (2009) nr. 3 pagina's 21-32 |
| Jaar: |
2009 |
| Inhoud: |
Cross layer optimization plays a key role in radio resource management of broadband wireless systems (BWS).Maximal SNR (MaxSNR) and Round Robin (RR) are two conventional scheduling strategies which emphasizeefficiency and fairness respectively. Proportional Fair (PF) provides a tradeoff between efficiency and fairness.Here, we tailor PF to OFDM-based BWS (OPF). To meet QoS requirements for multi-rate services in multimediasystems, we propose two algorithms: Adaptive OPF (AOPF) and Multimedia AOPF (MAOPF). Under timevarying and frequency selective fading wireless channel, system performances of OPF, AOPF, MAOPF areevaluated and compared with conventional MaxSNR and RR. We define user satisfaction rate and average userrate as optimization indication. Joint PHY and MAC simulation results show that OPF gives a good compromisebetween system throughput and fairness by providing the highest user satisfaction rate; MAOPF favors the highdate rate by increasing throughput while providing the highest average user rate. |
| Uitgever: |
Academy & Industry Research Collaboration Center (provided by DOAJ) |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 17 van 39 gevonden artikelen
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