Indian Journal of Science and Technology
DOI: 10.17485/ijst/2018/v11i22/121348
Year: 2018, Volume: 11, Issue: 22, Pages: 1-17
Original Article
F. Juan Carlos Vesga, H. Martha Fabiola Contreras and W. Harold Esneider Perez
Escuela de Ciencias Basicas Tecnologia e Ingenieria (ECBTI), Universidad Nacional Abierta y a Distancia; Carrera 27 Nro. 40-43. Bucaramanga, Colombia; [email protected], [email protected], [email protected]
*Author for correspondence
F. Juan Carlos Vesga,
Escuela de Ciencias Basicas Tecnologia e Ingenieria (ECBTI), Universidad Nacional Abierta y a Distancia; Carrera 27 Nro. 40-43. Bucaramanga, Colombia; [email protected]
Objectives: The growing demand of wireless connectivity supported in the standard 802.11 has brought high levels of interference between the adjoining Access Points (APs), due to the shared use of the ISM bands, considerably affecting the network performance. The objective of this paper is to propose an optimization model for the allocation of channels in the band of 5 GHz, supported in the use of allocation models. Methods Analysis: A scenario formed by 6-storey building and 24 Access Points distributed within the building (AP) is proposed. The optimization model for the allocation of band frequencies of 5 GHz is represented as a problem of linear programming, based on an allocation model, which is an alternative for the transport. The model seeks to maximize the allocated bandwidth to each AP, to minimize the interference between AP, increase the SINR levels and spectral efficiency, by means of the optimal clustering of channels within the UNII range. In order to determine if the proposed model (MF) does a better allocation of channels than the current model (MA), which incorporates RRM policies? A hypothesis contrast was carried out under difference of means for two independent samples, by means of the use of T-students test. Findings: Even though several works have been done related to the channel allocation, there was no evidence of any optimization model oriented to the band of 5 GHz and that is why the proposed model could be considered as the first optimization model for this frequency band. Based on the obtained results, it was possible to observe that the proposed optimization model (MF) did a better allocation of spectral resources compared to the current model (MA), being able to increase in more than 50% in the average SINR with a 95% confidence. Application: The model MF can be considered as a tool in future works of research, related to the design and analysis of wireless networks that use 5 GHz bands, in order to assess the performance, efficiency and QOS aspects.
Keywords: Cannel Allocation, Efficiency, Optimization, Performance, SINR, WLAN
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