These technologies bring the network closer to mobile users and improve spectral efficiency (SE) per unit arena (i.e capacity). Due to lower power and smaller physical size, pico/ femto/ relay cells can also be deployed to eliminate coverage holes and relay cells can be used in backhaul, where wire line backhaul is unavailable or not economical [150]-[152]. The heterogeneous deployment of LTE networks comprising of conventional Macro cell base stations overlaid with LPNs. The often random and unplanned location of these access points can cause severe interference problems especially for cell edge users. This problem was typically addressed by coordinating base-station transmissions to minimize interference. Figure 2.10 shows a heterogeneous …show more content…
• Disadvantages: Despite the benefits that can be achieved by this technique, there are some challenges that need to be addressed, including management of the interfaces between heterogeneous environments and the dead zone problem. Towards this direction, 3GPP LTE standard has introduced Inter Cell Interference Coordination (ICIC) methods since Release 8 specifications. ICIC was developed to deal with interference issues at cell-edge and mitigates interference on traffic channels only in heterogeneous network. These limitations were bypassed with Release 10 specifications which introduced enhanced Inter Cell Interference Coordination (e-ICIC). Enhancements were brought to deal with interference issues in Heterogeneous Networks and mitigate interference on traffic and control channels. In such networks, two major scenarios for severe inter cell interference should be highlighted: macro-pico scenario with Cell Range-Extension (CRE) and macro-femto scenario with Closed-Subscriber-Group
This paper is organized as follows: Section II will discuss the evolution of mobile wireless networks, Section III will introduce objectives of the 5G mobile network, Section IV will talk about goals to be evaluated in 5G wireless network communications, and Section V will present some concluding remarks.
Assistance with the current macro cell is required to power the small cells and coordinate with internet and radio backhaul and maintaining the Quality of Service (QOS) in the process [1].
A large problem with LTE and all wireless technology is their limitations when it comes to bandwidth. There can only be so much information flowing through the air at any given time, and with mobile network saturation on the rise, mobile operator are scrambling to get things running smoothly. Mobile operators have gone so far as to limit the amount of usage people can incur, charging them a set amount of money, and overcharging at that. If a user or family goes over the amount in which they subscribed to, they are charged outrageous overage fees. Mobile networks are also limited by building and object penetration, meaning when you walk into a building with thicker walls, there is a chance that you may not receive a signal. Geographical constraints also affect both mobile and fixed services, by making it almost impossible to provide an area with service, either because lines are unable to be ran, or the foliage and landscape block wireless transmissions.
The initial 4G technology Sprint offered was based of WiMAX technology. WiMAX proved to be fast technology, but lackluster in its performance and capabilities in regards to LTE. LTE has become the primary 4G technology in the United States while development of WiMAX has ceased. In addition, Sprint’s 4G vision has switched to LTE. The question is raised “Why did LTE win over WiMAX?”. From many perspectives, LTE proved to be the superior technology.
Cellular Broadband is used to access Internet on mobile devices, such as mobile phones, tablets and mobile dongles. There are currently three different technologies used to access the Internet from a mobile device, these include 2G, 3G and the current 4G. Cellular broadband is a subscription-based service, which usually comes as part of your mobile tariff from your provider. However, you can get separate tariffs just for cellular broadband, these are used in laptops and tablets to provide Internet access on the move. ITU Telecom World research indicates that 90% of the world is covered by a 2G signal; where as 45% of the world has a 3G signal (www.itu.int). This shows that there is a high demand for this service, and it is a very popular option to access Internet while bring mobile. This type of service is something that could be incorporated within our health authority network, for example a 4G connection can be used as a backup internet backbone as well as employees using the service to access
5G aims at building hybrid networks utilizing both the Wireless LAN concept and WAN design. Thus, the world would have base stations everywhere providing ubiquitous network coverage to users at high speed. For example, a user walking on road is browsing internet using GPRS (General Packet Radio Service-WAN design). The moment he enters a mall with Wi-Fi (LAN design), seamless hand-over from GPRS to Wi-Fi would take place without the user’s
A network is a group of computers and other devices (such as printers,phones,or a television) that are connected by some type of transmission media. A network can be two computers connected by a cable in a home office or as large as several thousand computers that are connected across the world. Networks has two fundamentals known as the peer-to-peer and client/server.
Abstract— The next generation wireless networks are the fourth generation (4G) networks which are targeted for various applications; voice, data and multimedia communications. The mobile technologies 1G, 2G and 3G have lot of disadvantages which has led to the invention of 4G. As the users of mobile devices increase the demand for faster and efficient communication in the mobile network also increase. 4G aims to provide the quality of service (QoS) guarantee for many applications, is an important intension in the design of next-generation wireless networks. The authors concentrate on the 4G architecture and its comparison with 3G networks. The main focus is on three important mechanisms such as cross-layer approach, a novel QOS optimization architecture and robust header compression technique with some header compression mechanisms with respect to different QoS parameters.
Wireless communication is the transfer of information over a distance without the use of enhanced electrical conductors or "wires”.
Network carriers are usually the carriers which have started their business a long time ago or an airlines that have found a market gap for the Full service airline. Network carriers as a custom have a variety of services they offer. Diversification of traveling classes for passengers: First-, Business-, Economy comfort and Economy classes. Of course pricing of these classes varies as well by the comfort and frills added to the product. The latest change has been withdrawing almost all the services to the level of LCCs fares. FSCs also offer freight services, either just using the belly, in other words, the aircrafts baggage department, or having additional freighter aircrafts, which carry only cargo on board.
Back too 4G/LTE, these two network are the next stage in mobile networking that is suppose to deliver much faster speed than there predecessors. Now some company’s offer 4G only not the LTE, 4G is actually a High Speed Packet Access network known as HSPA. The 4G HSPA offers down speeds between 5 megabits and 8 megabits per second. While 4G LTE is considerably much faster than 4G alone, 4G LTE uses (Multiple Input Multiple Output) MIMO technology. MIMO
interference mitigation techniques are interference cancellation, interference coordination and the third one is interference randomization currently investigated within 3GPP [1]. However, by using these techniques also the performance or improvements offered by the mitigation techniques are limited since inter cell interference is difficult to remove completely. A
The undersigned hereby certify that they have read and award a pass in INWK 6800 for the seminar project entitled "Vertical Integration in Wireless Networks" by Krishna Shesha sai in partial fulfilment of the requirements for the degree of Master of Engineering.
V. Erceg, et al, [39] a statistical path loss model, derived from 1.9GHz experimental data collected across the United States of America in 95 existing macrocells were presented. In all the 95 cellular base stations that were
Communicating with patients The New Medicine Service (and MURs) provides a formal opportunity for pharmacists to communicate with patients on a one-to-one basis about their medicines and underlying medical condition(s). The NMS permits the interventions to be done either as a face-to-face appointment or via telephone. Careful consideration must be given as to which of these communication methods is adopted by the pharmacy as each method brings its own advantages and disadvantages.