Modeling Of Subscriber Station Energy Consumption Network 802.16

Worldwide Interoperability for Microwave Access (WiMAX) is a Broadband Wireless Access (BWA) technology that has high speed and wide access for multimedia communication. The reception of quality video or voice packets at the receiver is related to how efficient the energy consumption is sent by the Subscriber Station (SS). The more video or voice packets that are sent, the more energy consumption is needed. One way to calculate energy consumption at a WiMAX subscriber station is by using mathematical modeling. This final project is modeling energy consumption in WiMAX. From the simulation, it is found that the change in the bit rate affects the energy consumption of the subscriber station. Through simulation, training data is generated to obtain a mathematical model.The mathematical model contains the components of the state duration and the level of energy consumption. Mathematical models are then used to predict energy consumption in WiMAX. The model is tested through the generation of test data. The test results through simulation showthe percentage deviation of the average energy consumption of training data with mathematical modeling on average is 0.180%. Meanwhile, the energy consumption of test data and mathematical models has an average deviation of 0.187% and 0.191%. The least energy consumption is generated when the MAC Initialization state (state i0) is 0.001 Joule, while the highest energy consumption is the Uplink Frame state (state i14) of 101.017226 Joule.

Method for optimization of frequency resource allocation with frequency reuse for cognitive radio system

The concept of cognitive radio can be described as a radio with the study of capabilities, i.e. as a radio that is able to gain knowledge about the radio environment and adjust its operating parameters and protocols accordingly. The task of minimizing the frequency band is relevant at the stage of the cognitive radio network functioning when distributing the frequency resource between subscriber stations. With the ever-growing demand for frequency bands, this challenge is driven by the need to improve the efficient use of the radio frequency spectrum through frequency reuse methods. This paper proposes a method for ensuring the reuse of frequencies based on obtaining estimates of mutual distances between subscriber stations in real time. An algorithm is proposed for solving the problem of frequency resource allocation optimization for a cognitive radio network with frequency reuse. The algorithm is based on the method of local optimization, one of the approximate methods of discrete programming. In this case, the condition of local optimality is that the operating frequency assigned to the next subscriber station must be the closest to the frequency assigned in the previous step. The efficiency of the frequency resource optimization algorithm for the LTE network was analyzed using simulation modeling. The dependences of the bandwidth on the number of subscriber stations served are obtained. The analysis showed that the use of this algorithm allows to reduce the frequency band by 2 -3 times. The analysis also showed that the efficiency of the algorithm increases with the growth of the number of subscriber stations served simultaneously.

Pengaruh Jarak Base Station Dengan Subscriber Station Terhadap Kinerja Wimax

Peningkatan permintaan layanan telekomunikasi tidak sepenuhnya dapat di penuhi oleh penyelenggaratelekomunikasi, Hal tersebut dikarenakan keterbatasan jaringan kabel yang tersedia dan mahalnyapenyelenggaraan untuk jaringan kabel tersebut. Broadband Wireless Access (BWA) menjadi salah satu alternatifsolusi untuk permasalahan tersebut. Seiring berkembangnya teknologi wireless, kemudian muncul WiMAX (Worldwide Interoperability for Microwave Access) sebuah standar internasional mengenai wireless system yangmengacu pada standar IEEE 802.16. Kebutuhan kualitas layanan yang baik menjadi tolak ukur, tingkat kepuasanpelanggan. Jarak Base Station (BS) dengan Subscriber Station (SS) merupakan salah satu faktor yangberpengaruh terhadap kinerja WIMAX, karena jarak antar keduanya akan menyebabkan parameter Free SpaceLoss (L FS ) semakin besar, hal ini mengakibatkan kinerja WiMAX akan semakin turun.

Performance Evaluation of Angular Separation on Cell Site Diversity Gain

There have been remarkable advancements in the field of broadband wireless access (BFWA) technologies. These technologies operate in microwave frequencies where rain attenuation is the most important factor leading to signal impairments. The use of cell site diversity (CSD) can help in overcoming the signal fading. During the event of rain, when the signal level falls below a particular threshold, the subscriber station switches to another base station in the coverage area. The CSD gain bears strong correlation with the angular separation between the various base stations. This paper analyses the effects of CSD gain on angular separation.

IMPACT OF MULTIPLAY TRANSMISSION IN MOBILE WIMAX USING OVERLAY SCANNING

The growing demand for mobile internet and wireless multimedia applications has motivated the development of broadband wireless-access technologies in recent years. There are several issues that could impact the base station handover as a serious problem in the mobile communication system. In hard handover, a short time break known as handover interruption decreases the quality-of-services (QoS) due to connection between mobile subscriber station (MS) and serving base station (BS) is closed and ranging hand initiation to establish new connection. Prolonged time of request and response due to number of neighbours to scan will cause delay in handover process. This research proposed performance analysis of WiMAX/IEEE 802.16 with mobility supported to scan the channels provided by the mobile station. The proposed strategy required the mobile station for operation with a scan that can be used to reduce the time when trying to establish a network connection or do between neighboring base station handover. A second type is the fast handover that is proposed to reduce the unnecessary surrender to six different access modes. The mobile WiMAX air interface utilizes orthogonal frequency division multiple access (OFDMA) as the preferred multiple-access method in the downlink (DL) and uplink (UL) for improved multipath performance and bandwidth scalability. All simulations are run using MATLAB software to develop a new Overlay Scanning Mechanism (OSMA) algorithm. OSMA mainly focus on when to perform a scan to estimate future needs. Simulation results are expected to show WiMAX coverage by using real world data to detect movement and show that there are strategies that reduce the time required for scanning operations significantly.

Analysis of Propagation Models, Delay, and Throughput for WiMAX in Urban Environments

This chapter presents a theoretical and experimental analysis of the electromagnetic signal propagation between a base station and a subscriber station in an urban setting using the IEEE 802.16d standard and test bed results, which are then compared to Ergeg’s (1998) modified version of the Hata-Okomura (1980) mathematical propagation model. The experimental results of the measurements are similar to the model using the type terrain Category B (Suburban). Additionally, under experimental conditions, equipment with technology IEEE 802.16d and IEEE 802.16e were used to analyze delay and throughput while data, voice, and video was transmitted. The tests show that delay is acceptable for Fixed WiMAX, although it is barely adequate for Mobile WiMAX. As far as throughput is concerned, the average rate is adequate to support applications that include data, voice, and video.