Small internal antennas for indoor UMTS base station with WLAN access point

2006 ◽  
Author(s):  
Aimo Arkko ◽  
Jani Ollikainen
Keyword(s):  
Access Point ◽  
Base Station

AMC-Loaded Wideband Base Station Antenna for Indoor Access Point in MIMO System

2015 ◽  
Vol 63 (2) ◽  
pp. 525-533 ◽  
Author(s):  
Guihong Li ◽  
Huiqing Zhai ◽  
Long Li ◽  
Changhong Liang ◽  
Rongdao Yu ◽  
...  
Keyword(s):  
Mimo System ◽  
Access Point ◽  
Base Station

Cooperative Communication System Architectures for Cellular Networks

2010 ◽  
pp. 522-547
Author(s):  
Mischa Dohler ◽  
Djamal-Eddine Meddour ◽  
Sidi-Mohammed Senouci ◽  
Hassnaa Moustafa
Keyword(s):  
Business Models ◽  
Access Point ◽  
Cooperative Networks ◽  
Base Station ◽  
System Architectures ◽  
Data Rates ◽  
Promising Solution ◽  
Coverage Problems ◽  
The Cost

An ever-growing demand for higher data-rates has facilitated the growth of wireless networks in the past decades. These networks, however, are known to exhibit capacity and coverage problems, hence jeopardizing the promised quality of service towards the end-user. To overcome these problems, prohibitive investment costs in terms of base station or access point rollouts would be required if traditional, non-scalable, cell-splitting, and micro-cell capacity dimension procedures were applied. The prime aim of current R&D initiatives is, hence, to develop innovative network solutions that decrease the cost per bit/s/Hz over the wireless link. To this end, cooperative networks have emerged as an efficient and promising solution. We discuss in this chapter some key research and deployment issues, with emphasis on cooperative architectures, networking, and security solutions. We expose some motivations to use such networks, as well as latest state-of-the-art developments, open research challenges, and business models.

Performance Improvement of MU-MIMO System by Optimizing the K-Factor for the K-Mean User Grouping Algorithm

2016 ◽  
Vol 5 (3) ◽  
pp. 89
Author(s):  
Ankush Kansal ◽  
Pawandeep Singh
Keyword(s):  
Mimo System ◽  
Access Point ◽  
Base Station ◽  
Optimum Number ◽  
Multiuser Mimo ◽  
User Grouping ◽  
Single Antenna ◽  
User Groups ◽  
Sum Rate ◽  
Grouping Algorithm

<p>In this paper, downlink multiuser-MIMO system with large number of transmitting antennas at the base station and R user terminals each having single antenna is considered. According to this design, an access point communicates with large number of users in the Rayleigh fading scenario. Due to large number of users, it becomes difficult to accommodate all of them in the system simultaneously. So, a user grouping technique known as K-mean clustering is used, such that a group of users with similar conditions at that particular time are served together. While making groups, the interference is surely reduced but the number of users being served at a time also reduces. So, it is necessary to make out the balance such that the performance of the system is maintained while accommodating maximum number of users. So, optimum number of user groups needs to be formed. The results show that when groups are increased from two till four sum rate increases but when five groups are made the sum rate decreases to a point but, is still higher than two groups.</p><p> </p>

scholarly journals Implementasi Point to Point Jaringan Internet Nirkabel di SMA Universitas Klabat

2016 ◽  
Vol 2 (2) ◽  
pp. 240
Author(s):  
Jimmy Moedjahedy
Keyword(s):  
Life Cycle ◽  
Access Point ◽  
Base Station ◽  
Network Development ◽  
Development Life Cycle ◽  
Point To Point

Point to Point jaringan nirkabel merupakan solusi untuk menghubungkan dua jaringan yang berada dilokasi yang berbeda dan sulit untuk dilewati kabel jaringan. SMA Universitas Klabat walaupun terletak satu kawasan dengan kampus utama universitas namun lokasi gedung agak jauh dan sulit untuk dilewati kabel. Tujuan dari penelitian ini adalah untuk membangun insfrastruktur jaringan internet lewat point to point, analisis dan desain access point yang akan digunakan serta pembagian bandwidth yang merata ke setiap client. Metode penelitian yang digunakan dalam penelitian ini adalah Network Development Life Cycle dengan tahapan analisis, desain, simulasi, implementasi, monitoring dan manajemen. Base station dan client yang digunakan adalah nano station M5 ubiquiti, access point yang digunakan untuk koneksi jaringan nirkabel disetiap gedung adalah ubiquiti UAP dan pembagian bandwidth diatur menggunakan mikrotik router board. Hasil implementasi dari penelitian ini adalah koneksi internet dapat tersalur dari kampus utama universitas ke SMA serta dapat digunakan oleh siswa dan guru baik diruangan kelas maupun dikantor.Kata kunci—Point to Point, Bandwidth, Jaringan Nirkabel, Ubiquiti

scholarly journals Study of Multiband DRA for Mobile communication

2015 ◽  
Vol 5 ◽  
pp. 75-77
Author(s):  
Dorik Narayan Yadav
Keyword(s):  
Mobile Communication ◽  
Information Transfer ◽  
Access Point ◽  
Base Station ◽  
Antenna Design ◽  
Mobile Unit ◽  
Wideband Antennas ◽  
Fundamental Parameters ◽  
Multiband Antennas ◽  
Personal Devices

The explosive demand for mobile communication and information transfer using personal devices such as mobile phone or notebook computer has caused the need for major advancements of antenna design. With the development of 3G and 4G technologies multiband and wideband antennas operating at additional frequency band such as UMTS and LTE are required. In this chapter it is initially presented the fundamental parameters of antenna to be taken into account while designing an antenna and determining the operating frequency bands. Multiband antennas which are used especially in mobile unit are described. The techniques to make an antenna convenient for multiband operations are given. There different antennas such as monopoles, PIFA are examined with several examples in the literatures. In the last part, the types of wideband antennas (micros strip patch antenna, DRA of planer) used in mobile communication which are more appropriate for base station or access point applications are presented.  The Himalayan Physics Vol. 5, No. 5, Nov. 2014 Page: 75-77

scholarly journals P2P Communication among Computers and Smartphones Based on Bluetooth and Wi-Fi Direct Technologies

2020 ◽  
Vol 14 (1) ◽  
pp. 23
Author(s):  
Venant Uzayisenga ◽  
Tri Kuntoro Priyambodo
Keyword(s):  
Data Transmission ◽  
Usability Testing ◽  
Access Point ◽  
Base Station ◽  
Third Party ◽  
Average Score ◽  
Functional Testing ◽  
Functional Requirements ◽  
Wireless Technologies ◽  
System Usability Scale

As result of the development of technology, most of modern computer and smartphones are Bluetooth and Wi-Fi direct wireless technologies enabled. While those wireless technologies come with the benefits of interconnecting devices without the need access point or central base station. However, computer and smartphones connected via Bluetooth based or via Wi-Fi Direct connection does not guarantee intercommunication or data transmission in meaningful way. Therefore, third party software is always needed to help for achieving data transmission. In this research an effort is done to design and develop P2P software applications and web based application by using C# and ASP.net MVC programming languages as features of Visual Studio 2017. Application would facilitate P2P communication of interconnected devices via the same channel. Built software system has been tested based on functional testing method, and usability testing. The result from functional testing shows that P2P communication meets functional requirements while usability testing has an average score of 72.2% from System Usability Scale method. The results from SUS scores brands our proposed P2P communication system to be good and highly accepted.

Delay-Sensitive Network Selection and Offloading in LTE-A and Wi-Fi Heterogeneous Networks

2020 ◽  
pp. 2150120
Author(s):  
Chun-Chuan Yang ◽  
Jeng-Yueng Chen ◽  
Yi-Ting Mai ◽  
Yi-Chih Wang
Keyword(s):  
Traffic Congestion ◽  
Access Network ◽  
Access Point ◽  
Base Station ◽  
Network Selection ◽  
Core Network ◽  
Delay Sensitive ◽  
Radio Access ◽  
Lte Advanced ◽  
Average System

LTE-Advanced (LTE-A) offloading is concerned about alleviating traffic congestion for the LTE-A network, which includes the core network and the radio access network (RAN). Due to the scarcity of the radio resource, offloading for the LTE-A RAN is more critical, for which an efficient way is to integrate Wi-Fi with LTE-A to form a heterogeneous RAN environment. An LTE-A UE (User Equipment) with the wi-fi interface can therefore access the Internet via an LTE-A base station of Evolved Node B (eNB) or a wi-fi Access Point (AP). In this paper, wireless network selection for UEs with delay-sensitive traffic in the heterogeneous RAN of LTE-A and wi-fi is addressed. Based on the queueing model of M/G/1, a novel network selection and offloading scheme, namely Delay-Sensitive Network Selection and Offloading (DSO), is proposed. The average system time at LTE-A eNBs and wi-fi APs calculated according to M/G/1 is used for network selection as well as offloading operations in DSO. The benefit of DSO in terms of satisfying the delay budget of UEs and load balancing is demonstrated by the simulation study.

D2D- and DTN-Based Efficient Data Offloading Techniques for 5G Networks

2021 ◽  
pp. 437-456
Author(s):  
Bighnaraj Panigrahi ◽  
Hemant Kumar Rath ◽  
Bhushan Jagyasi ◽  
Anantha Simha
Keyword(s):  
Cellular Networks ◽  
Smart Phone ◽  
Access Point ◽  
Base Station ◽  
Access Networks ◽  
Network Resources ◽  
Available Bandwidth ◽  
Close Proximity ◽  
Efficient Data ◽  
Delay Tolerant

With the advancement of smart phone technologies cellular communication has come to a stage where user bandwidth has surpassed the available bandwidth. In addition, the well-organized but stubborn architecture of cellular networks sometimes creates hindrance to the optimal usage of the network resources. Due to this, a User Equipment (UE) experiencing a poor channel to the Base Station (BTS) or evolved NodeB (eNB) or any other Access Point (AP) retransmits the data. In such scenarios, Device-to-Device (D2D) communication and offload/relay underlying the cellular networks or the access networks provides a unique solution where the affected UE can find a close proximity offloader UE to relay its data to eNB. Delay Tolerant Networks (DTN) is another framework which has potential usage in low-connectivity zones like cell edge and/or remote locations in cellular networks. This chapter investigates various possibilities where D2D and DTN can be jointly used to improve teledensity as well delayed but guaranteed services to poor or no connectivity areas.

scholarly journals A wireless caching helper system with heterogeneous traffic and random availability

2021 ◽  
Vol 2021 (1) ◽  
Author(s):  
Ioannis Avgouleas ◽  
Nikolaos Pappas ◽  
Vangelis Angelakis
Keyword(s):  
Performance Metrics ◽  
General System ◽  
Arrival Rate ◽  
Access Point ◽  
Base Station ◽  
Heterogeneous Traffic ◽  
Small Cells ◽  
System Throughput ◽  
Multimedia Content ◽  
Packet Arrival

AbstractMultimedia content streaming from Internet-based sources emerges as one of the most demanded services by wireless users. In order to alleviate excessive traffic due to multimedia content transmission, many architectures (e.g., small cells, femtocells, etc.) have been proposed to offload such traffic to the nearest (or strongest) access point also called “helper”. However, the deployment of more helpers is not necessarily beneficial due to their potential of increasing interference. In this work, we evaluate a wireless system which can serve both cacheable and non-cacheable traffic. More specifically, we consider a general system in which a wireless user with limited cache storage requests cacheable content from a data center that can be directly accessed through a base station. The user can be assisted by a pair of wireless helpers that exchange non-cacheable content as well. Files not available from the helpers are transmitted by the base station. We analyze the system throughput and the delay experienced by the cached user and show how these performance metrics are affected by the packet arrival rate at the source helper, the availability of caching helpers, the caches’ parameters, and the user’s request rate by means of numerical results.

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