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Physical Cell Identity (PCI) has an essential role in the operation of the Long-Term Evolution network (LTE/LTE-A), and is specifically used to identify cells in the network. An improper PCI assignment might lead to cell conflict with undesirable consequences. To solve the aforementioned PCI's challenges, this paper presents a new graph-coloring algorithm called the Matrix Based algorithm that provides...
Long Term Evolution (LTE) is a breakthrough in broadband technology which aims to support several high level quality and real time multimedia services for the mobile users. This paper proposes a resource block preserver (RBP) scheduling algorithm which optimizes the performance of the downlink transmission system in LTE network. The resource block preserver algorithm has two layers, upper and lower...
The challenge of removing redundant handover (HO) has gained more importance after the existence and deployment of femtocell in the network. By nature, the existence of femtocell can lead to the increase of handover initiation. However, 3GPP standard provides Mobility Robustness Optimization (MRO) to optimize handover performance. MRO is a use-case for Self-Organizing Network (SON). The conventional...
The IP multimedia subsystem (IMS) functionality is designed to work on a variety of wireless access technologies and in all network coverage such as macrocell, microcell and femtocell. In this paper we have implemented an IMS registration procedure for the LTE-based femtocell networks. Additionally, we proposed the SIP based IMS framework mechanism for LTE-based femtocell implementation. Two processes...
Femtocell or Home eNode cell in LTE is a home base station that anticipated to be deployed in very large numbers with fully automated manner. Femtocell provides enhanced coverage for in-building cellular services. The enhanced data rates enable new multimedia services which in turn generate new revenue. However, with all the convenience such device can provide, locating the user's geographic location...
The aim of designing the architecture for the IP multimedia subsystem is to provide fixed and mobile multimedia services independent of the access network technologies. One of these access networks is the 4th generation broadband LTE which supports femtocell deployment as to improve the indoor end-user experience. In this work we proposed an IMS module for the signalling in the LTE-based femtocell...
The vertex-colouring problem is a well-known classical problem in graph theory in which a colour is assigned to each vertex of the graph such that no two adjacent vertices have the same colour. The minimum vertex-colouring problem is known as NP-hard problem in an arbitrary graph. In this paper a graph colouring algorithm based on modified incidence matrix is proposed for resolving Physical Cell ID...
Physical Cell Identity (PCI) assignments and conflicts are still posing huge challenges in the LTE-femtocell based network. This challenges stem from the problem of only 504 unique PCls are available in the LTE network. In this work we propose an approach to solve this problem with minimum needs of human intervention, besides preserving the network resources by discarding the need of periodically...
This study proposed an algorithm to stabilize jittery videos directly without the need to estimate camera motion. A stable output video will be attained without the effect of jittery that caused by shaking the handheld camera during video recording. Firstly, salient points from each frame from the input video is identified and processed followed by optimizing and stabilize the video. Optimization...
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