Long Term Evolution (LTE) network standard defines requirements to guarantee Quality of Service (QoS) for diverse
applications such as VoIP, video and web browsing according to the Third Generation Partnership Project (3GPP) specifications. The
Radio Resource Management (RRM) techniques such as Call Admission Control Schemes play an important role in providing such
guarantees. Consequently, several schemes have been proposed to manage resources while ensuring QoS to wireless applications. This
paper presents a survey of Call Admission Control (CAC) Schemes. These algorithms are classified into CAC with Pre-emption, Resource
Reservation (RR), Resource Degradation (RD), Delay Awareness (DA) or Channel Awareness (CA). The operational procedure, strengths
and weaknesses of each scheme are discussed. The comparative analysis of these schemes is also presented. The analysis provides an
insight on open research issues for future research.
Published In:IJCSN Journal Volume 6, Issue 4
Date of Publication : August 2017
Pages : 523-532
Figures :02
Tables : 03
Muhammad Aminu Lawal : received the B.Eng. and M.Sc.
degrees in Electrical and Computer Engineering from Federal
University of Technology Minna, Nigeria, in 2007, Nigeria, and
Universiti Putra Malaysia (UPM), in 2014, respectively. He is
working with the department of Mathematics and Computer
Science at Umaru Musa Yar’adua University Katsina, Katsina
State, Nigeria His research interests include Scheduling Algorithm
and Call Admission Control in LTE networks.
Ibrahim Saidu : obtained the B.Sc. and the M.Sc. degrees in
Mathematics from Usmanu Danfodiyo University Sokoto, Nigeria,
in 1998 and Bayero University Kano, Nigeria, in 2009,
respectively. He also obtained another BIT and M.S. degrees in
Computer Science from Al-Madinnah International University and
Universiti Putra Malaysia (UPM), respectively. In addition, he also
obtained PhD degree in Computer Networks at UPM. Currently, he
is working with the department of Mathematics and Computer
Science at Umaru Musa Yar’adua University Katsina, Katsina
State, Nigeria. His research interests include Quality of Service
and Resource Management in Wireless Networks.
Yusra Sade Abdullahi : obtained B.Sc and M.Sc in physics from
Bayero University Kano, Nigeria in 2011 and 2017 respectively.
She is currently working with the department of Physics at Umaru
Musa Yar’adua University Katsina, Katsina State, Nigeria. Her
research interests include Computational and Solid state Physics.
LTE Networks, Call Admission Control, Radio Resource Management, QoS.
In this paper, we presented a survey of CAC schemes
proposed in recent literature, aiming at admitting call
requests into the LTE network based on available
resources. The schemes are classified into CAC with
Resource Reservation (RR) , Resource Degradation (RD)
,Pre-emption ,Delay Awareness (DA) and Channel
Awareness (CA).The way each scheme operates as well
as the advantages and the disadvantages are also
discussed. Furthermore, comparative analysis has been
provided. The analysis indicates that the majority of the
schemes have poor resource utilization because resources
are not fully used. Also the analysis shows new calls
experience high call blocking probability due to
prioritization used.
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