Current Issue : January - March Volume : 2018 Issue Number : 1 Articles : 5 Articles
5G encompasses the development of various key wireless communication technology standards. The development entails both\ntechnological advancement and social interaction. This paper analyzes 5G development and its significant shift from a strategy\npolicy to a user-oriented development showing the coplay of technology and society in China. Based on this theory, relevant\nproposals are recommended for future technical development and industrial regulation. Also, to increase the throughput and\nspectrum efficiency, channel assignment and load balance are considered. A hybrid routing protocol TOHRP (tree-based and ondemand\nhybrid routing protocol) and a distributed channel assignment algorithm LBCA (Load Based Channel Assignment) in the\nmultichannel environment are proposed and they solve the traditional problem of (1) waste of spectrum and (2) self-interference.\nThe computer-simulated experiment shows that the algorithm improves the performance....
A mobile ad hoc network (MANET) is a collection of mobile nodes that dynamically form a temporary network without using\nany existing network infrastructure. MANET selects a path with minimal number of intermediate nodes to reach the destination\nnode. As the distance between each node increases, the quantity of transmission power increases. The power level of nodes affects\nthe simplicity with which a route is constituted between a couple of nodes. This study utilizes the swarm intelligence technique\nthrough the artificial bee colony (ABC) algorithm to optimize the energy consumption in a dynamic source routing (DSR) protocol\nin MANET. The proposed algorithm is called bee DSR (BEEDSR). The ABC algorithm is used to identify the optimal path from\nthe source to the destination to overcome energy problems. The performance of the BEEDSR algorithm is compared with DSR\nand bee-inspired protocols (BeeIP). The comparison was conducted based on average energy consumption, average throughput,\naverage end-to-end delay, routing overhead, and packet delivery ratio performance metrics, varying the node speed and packet size.\nThe BEEDSR algorithm is superior in performance than other protocols in terms of energy conservation and delay degradation\nrelating to node speed and packet size....
Wireless indoor and outdoor microcells (WIOMs) have emerged as a promising means to\ndeal with a high demand of mobile users for a variety of services. Over such heterogeneous networks,\nthe deployment of WIOMs costs mobile/telecommunications company high capital expenditures and\noperating expenses. This paper aims at optimising the WIOMs taking into account various network\ncommunication environments. We first develop an optimisation problem to minimise the number\nof cells as well as determining their optimal locations subject to the constraints of the coverage\nand quality-of-service (QoS) requirements. In particular, we propose a binary-search based cell\npositioning (BSCP) algorithm to find the optimal number of cells given a preset candidate antenna\npositions. The proposed BSCP algorithm is shown to not only reduce the number of cells for saving\nresources but also requires a low computational complexity compared to the conventional approaches\nwith exhaustive search over all available sites. Moreover, EDX SignalPro is exploited as a simulation\nplatform to verify the effectiveness of the proposed BSCP for the WIOMs with respect to various\npropagation modes and antenna parameters of different types, including isotropic, multiple-input\nsingle-output and multiple-input multiple-output....
In the competitive telecommunications market, the information that the mobile telecom\noperators can obtain by regularly analysing their massive stored call logs, is of great interest.\nAlthough the data that can be extracted nowadays from mobile phones have been enriched with\nmuch information, the data solely from the call logs can give us vital information about the customers.\nThis information is usually related with the calling behaviour of their customers and it can be used to\nmanage them. However, the analysis of these data is normally very complex because of the vast data\nstream to analyse. Thus, efficient data mining techniques need to be used for this purpose. In this\npaper, a novel approach to analyse call detail records (CDR) is proposed, with the main goal to extract\nand cluster different calling patterns or behaviours, and to detect outliers. The main novelty of this\napproach is that it works in real-time using an evolving and recursive framework....
Wireless Local Area Network (WLAN) offloading is an important approach to\naddress the data traffic challenge faced by Long Term Evolution (LTE) network.\nLegacy offloading solutions based on the core network suffer from the\nlimitations of load unbalance and user experience degradation. To solve this\nproblem, 3GPP has recently proposed a radio access network (RAN) assisted\nWLAN offloading scheme. In this article, we thoroughly analyze the performance\nof this new scheme, with emphasis on the RAN auxiliary parameters\nand control rules defined in it. Furthermore, two kinds of offloading algorithms\nbased on this scheme are proposed and compared with the traditional\nsolutions by simulation. Results show that the RAN-assisted offloading\nscheme can increase average user throughput and leverage resources available\nin both LTE and WLAN systems....
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