Rendy Munadi

Coexistence LTE with GSM and UMTS - performance analysis using seamcat simulation

The LTE (Long Term Evolution) technology is expected to offer a number of distinct advantages over other wireless technologies. Scarcity of spectrum had encouraged regulator and provider to refarmed the spectrum. Spectrum refarming for LTE in 900MHz, 1800 MHz or 2100 MHz frequencies band is considered to trigger the potential degradation of existing services such as GSM and UMTS. The simulations results decribe that in those frequencies band options, LTE can well coexist with other technologies in the ecosystem such as GSM and UMTS. Overall simulation results show that at 1800 MHz while LTE is interfered by LTE and others such as GSM and UMTS, the performance is lower than other frequencies, so the best option is at 900 MHz or 2100 MHz of the frequencies.

Inter-regional voice bandwidth calculation on IMS network

The inter-regional telecommunication network design in Indonesia is strongly influenced by the bandwidth of Voice over Internet Protocol (VoIP), where 40% of the national bandwidth is used to pass voice communication. Indonesia region is divided into seven regional areas; each of these is supported by two IMS Cores, which serves as the active core and the stand-by core. Regionals are interconnected with each other through an IP backbone network. It serves to get through a number of bandwidth when there is communication between the regionals. The bandwidth requirement can be obtained through the calculation of traffic in regional, inter-regional traffic, and along with demographic data as well as the number of customers who have registered on the IMS network. Since voice traffic is passed in IP networks, the voice bandwidth is calculated in bps (bits per second) units. Standard voice codecs used for the conversion are G.711 and G.729. The national bandwidth load for voice traffic on the IMS backbone network can be obtained using mathematical calculations. The results of the calculation are presented in bandwidth matrices of the seven regions traffic for each standard (G.711 and G.729).

Smart Garage Implementation and Design Using Whatsapp Communication Media

WhatsApp is a social networking app that serves as a communication medium. According to the Online Audience Measurement Standards named comScore, in 2017, WhatsApp application users in Indonesia amounted to 35.8 million people. As the most popular mobile application with the most users in the country, in this research the authors chose Whatsapp as a communication medium that will be integrated into one application of Internet of Things (IoT), that is Smart Garage. Smart Garage is a combination of information technology and computing technology that is applied to a house by relying on efficiency and device automation. The results of this research shows that it is better to use mobile data networks than using the wireless networks. The maximum delay when using mobile data is 7.5 s and 7.7 s when using wireless networks. The research using WhatsApp application still rare especially in the field of IoT.

Performance evaluation Gauss-Markov mobility model in vehicular ad-hoc network with spearman correlation coefficient

Vehicular ad-hoc network (VANETs) developed based on mobile ad hoc networks (MANETs), which is expected to provide communication between the vehicles and can be used for safety and entertainment applications for drivers and passengers. VANET have characteristics somewhat different from the MANET, the VANET mobile node moves faster, the number of nodes is more, topology changes very dynamically. Previous research shows that the model of mobility affecting network performance. An example of mobility model that is used to illustrate the movement of the mobile node is Gauss-Markov mobility model, which is used to illustrate changes of acceleration, velocity, and location, as well as its direction at any time. The contribution of this paper is the evaluation of the performance of Gauss-Markov mobility model on VANET, by evaluating various network performance metrics, particularly, packet delivery ratio, throughput, and delay use simulation software ns-3. This simulation was performed with the number of nodes and randomness index (a) that varies. From simulation results, there is a strong correlation between the decline in the value of Packet delivery ratio (PDR) and throughput with the addition number of MNs and also between the increase of delay and the addition number of MNs. In Gauss-Markov mobility model, the different value of alpha has no impact on PDR, Throughput, and delay.

A performance analysis of packet scheduling algorithms between homogeneous algorithm and hybrid algorithm in point to multipoint WiMAX networks

WiMAX (Worldwide Interoperability for Microwave Access) is a wireless technology that provides long distance broadband connectivity. It has high speed access, wide coverage areas, and provides various types of services. Applying WiMAX has challenging problem when it has to provide quality assurance of service (QoS) for different types of services with diverse QoS needs. To meet the QoS requirements, a scheduling algorithm is needed. Scheduling algorithm is to regulate the transmission of data packets, such as regulating the sharing of resources (bandwidth) for each user. This research implemented a WiMAX network simulation scheduling algorithm with homogeneous and hybrid algorithm methods. Representatives on the homogeneous algorithms method used Weighted Fair Queuing scheduling algorithm (WFQ) and Deficit Round Robin (DRR), whereas the hybrid algorithm method used a merge between DRR and WFQ scheduling algorithm. Testing the performance of the scheduling algorithm was performed by comparing the QoS class into 5 types, namely WiMAX UGS, RTPS, nRTPS, eRTPS and Best Effort. The parameters used to test the performance of a WiMAX network are throughput, packet loss, delay and jitter.

Analysis secure socket layer protocol with heartbleed bug and distributed denial-of-service

Nowadays one-way communications such as video streaming are easier to be used. One of service which eases those communications is Internet Protocol Television. By easiness of service packet-based that has entered in the whole of world made simplifies access of IPTV services. This research simultaneously uses 2 types of attacks. Those are Distributed Denial-of-Service and Heartbleed bug, with hacker or penetration tester does not belong to examiner. In the final task, the experiments of analysis are taken from 3 scenarios: using VLC program, web page-interface, and web page-interface after being attacked by penetration tester or hacker, with Open-Shortest Path First as routing protocol, and Protocol Independent Multicast as grouping of videos IP. The result has showed that Heartbleed bug did not detect on this experiment related to the result of QoS parameters, while DDoS could disturbed the stabilities of network performance.

Forecasting formulation model for amount of fault of the CPE segment on broadband network PT. Telkom using ARIMA method

Currently, there is no forecasting activities undertaken within the PT. Telkom to predict Fault will occur in the broadband network, which prevents fault broadband networks are still focused on the process of correction, on the other hand, the accuracy of a prediction is the value that determines the quality of the model or algorithm is run that prediction. The results determine the accuracy of prediction and prevention process, this involves time and costs [1J. There are several methods for predicting fault will occur in broadband networks, among others; GARCH, ARM A, ARIMA [1], Kalman Filter and Hidden Markov [2J. These methods are methods autoregresi and nonlinear time series [1], the methods used in this research is the method ARIMA (Autoregressive Integrated Moving Average). This method was chosen because the CMSE (Cumulative Mean Square Error) value of this method is the most excellent [1] [2J. In the Broadband Network PT Telkom, 61.7% occurred in the segment disorders CPE (Customer Premise Equipment). Find a formulation to predict the amount of fault that would occur per type of disturbance in this segment with the aid of ARIMA method It will help to prepare a good resource skills, knowledge and cost in prevention activities, improving the quality of CPE devices and improve service quality PT Telkom. This research was conducted with the order or lag monthly data, run two scenarios, first; 24 observation data lag with 12 forecast lag, second; 30 observation data lag and 6 lag forecasts. This research resulted in the value of AR = 4, d = 1 and MA = 5. It appears that more observation data and the shorter lag forecast, then the results produced ARIMA will be more accurate. This can be seen in comparison error deviation and/or CMSE for each scenario.

OLSR and AODV routing protocol performance analysis in ad hoc mobile phone network to maintain the connectivity of celluler network

The connectivity of the user equipment is one of the important thing that must be keep by the operator. To maintain this connectivity, operator should be smart to determine the network infrastructure that is low cost, easy, and fast to be implemented. To solve those connectivity problem, in this study will be designed an ad hoc mobile phone network. In an ad hoc network mobile phone which is built on a mesh client of the Wireless Mesh Network (WMN) allows a user equipment (UE) that having a poor link quality or out of eNode-B coverage will still get service from eNode-B by transmitting data packets over others UE which has better link quality using using wi-fi technology that already exist in each UE. This network is chosen because it is self-configuring, self-organizing, self-healing and does not require fixed infrastructure in implementation and does not require communication with the higher entities such as core or Radio Network Controller (RNC).

Modifing Power Source Aware Routing (PSAR) algorithm with fuzzy logic addition in ZigBee network

Routing mechanism is one of the many ways to optimize the performance of Zigbee network that used battery-powered device. Therefore, a variety of routing algorithms are developed to obtain the optimal performance. One of the examples is Power-Source Aware Routing (PSAR) algorithm. However, PSAR algorithm has problem that the reconfiguration of battery powered node from communication path is not always possible to be conducted due to the availability of lots of battery-powered devices, or node located outside the communication range, etc. We proposed the modified PSAR algorithm by adding a fuzzy logic. This was to select the optimal battery powered node to forward the message to their neighbors. The results of the simulation indicate that for overall battery powered node, PSAR algorithm has 10.5 percent smaller energy consumption in average compared to Tree algorithm. In addition as a result of the reconfiguration, PSAR algorithm has longer lifetime node. For overall battery-powered node, the modified PSAR algorithm has 6.1 percent smaller energy consumption compared to PSAR algorithm. The modified PSAR algorithm has also more balance lifetime node.