期刊名称：International Journal of Advanced Computer Science and Applications(IJACSA)
印刷版ISSN：2158-107X
电子版ISSN：2156-5570
出版年度：2019
卷号：10
期号：9
页码：383-391
出版社：Science and Information Society (SAI)
摘要：Worldwide Interoperability for Microwave Access
network accepts the challenge of last mile wireless access for
internet. IEEE 802.16 standard, commercially known as WiMAX
provide wireless broadband experience to the end subscribers
and challenges many wired solutions like Digital Subscriber Line
(DSL) and cable internet. Wireless network has many inherent
issues like coverage holes; capacity optimization and mobility are
few of them. Adding relays to multi-hop WiMAX IEEE 802.16j
network present an effective solution to address them to some
extent but this amendment does not elaborate any algorithm
regarding the relay selection and narrate no performance
guarantees. In this work, we proposed linear model that fairly
allocates wireless resources among subscribers in 802.16j
network. A relay selection algorithm is also presented to
optimally select nodes with higher signal-to-noise ratio as relay
station for nodes with lower signal-to-noise ratio objectively
maximize overall network capacity. This scheme further extends
network coverage area and improves network availability. We
also did extensive performance evaluation of the proposed linear
model. Results show that optimal relays selection scheme do
provide a substantial increase of up to 66% in overall network
capacity in the fixed WiMAX network. This improvement is
substantial at places where network condition is not optimal.
Investigating the problem further leads to the conclusion that the
relay selection criterion is the key to achieve maximum network
capacity.
