Presentation on Wireless devices
- 1. Presentation on Bluetooth, Infrared, Wi-Fi, GSM & GPRS Presented By Name: X ID: 0000 Department: CSE Section: A
- 2. Bluetooth Advantages: It avoids interference from other wireless devices. It has lower power consumption. It is easily upgradeable. It has range better than Infrared communication. The Bluetooth is used for voice and data transfer. Bluetooth devices are available at very cheap cost. No line of sight hence can connect through any obstacles. Free to use if the device is installed with Bluetooth. The technology is adopted in many products such as head set, in car system, printer, web cam, GPS system, keyboard and mouse. Disadvantages: It can lose connection in certain conditions. It has low bandwidth as compared to Wi-Fi. It allows only short range communication between devices. Security is a very key aspect as it +can be hacked. Bluetooth is a short-range wireless technology standard used for exchanging data between fixed and mobile devices over short distances using UHF radio waves in the ISM bands, from 2.402 GHz to 2.480 GHz, and building personal area networks (PANs). It was originally conceived as a wireless alternative to RS-232 data cables.
- 3. Infrared Advantages: Infrared transmission requires minimum power to operate and can be set up at a low cost. This is a secure way to transfer data between devices as the signal cannot pass beyond a room or chamber. Disadvantages: The speed of data transfer in infrared is slow. Infrared can be used for a small range distance. Infrared signals are interpreted by objects and people. These signals are impacted by weather conditions. Infrared (IR), sometimes called infrared light, is electromagnetic radiation (EMR) with wavelengths longer than those of visible light. It is therefore invisible to the human eye. Types: Because of the huge temperature range covered by Infrared and the different physical characteristics of the heat as you progress through the frequencies, infrared itself has been divided into three different types of Infrared: Short Wave (Or Near Infrared, or IR-A). 0.78 to 1.5 microns: covers the thousands to high hundreds of degrees Centigrade. Medium Wave (Or Medium or Middle Infrared, or IR-B). 1.5 to 3 microns: covers the high hundreds to mid-hundreds of degrees Centigrade. Long Wave Infrared (Or Far Infrared, or IR-C). 3 microns to 1000 microns (1mm): covers the mid hundreds of degrees centigrade to absolute zero. Applications: • Medicine • Military • Industry • Biological systems • Meteorology • Car locking systems • Computers • Emergency response systems • Environmental control systems • Headphones • Home security systems • Navigation systems • Telephones • TVs, VCRs, CD players, stereos
- 4. Wi-Fi Advantages of Wifi: Convenience – The wireless nature of such networks allow users to access network resources from nearly any convenient location within their primary networking environment (a home or office). With the increasing saturation of laptop-style computers, this is particularly relevant. Mobility – With the emergence of public wireless networks, users can access the internet even outside their normal work environment. Most chain coffee shops, for example, offer their customers a wireless connection to the internet at little or no cost. Productivity – Users connected to a wireless network can maintain a nearly constant affiliation with their desired network as they move from place to place. For a business, this implies that an employee can potentially be more productive as his or her work can be accomplished from any convenient location. Deployment – Initial setup of an infrastructure-based wireless network requires little more than a single access point. Wired networks, on the other hand, have the additional cost and complexity of actual physical cables being run to numerous locations (which can even be impossible for hard-to-reach locations within a building). Expandability – Wireless networks can serve a suddenly-increased number of clients with the existing equipment. In a wired network, additional clients would require additional wiring. Cost – Wireless networking hardware is at worst a modest increase from wired counterparts. This potentially increased cost is almost always more than outweighed by the savings in cost and labor associated to running physical cables. Wi-Fi is a family of wireless network protocols, based on the IEEE 802.11 family of standards, which are commonly used for local area networking of devices and Internet access, allowing nearby digital devices to exchange data by radio waves. Key capabilities of Wi-Fi 6 Orthogonal frequency division multiple access (OFDMA) effectively shares channels to increase network efficiency and lower latency for both uplink and downlink traffic in high demand environments Multi-user multiple input, multiple output (multi-user MIMO) allows more downlink data to be transferred at one time, enabling access points (APs) to concurrently handle more devices 160 MHz channel utilization capability increases bandwidth to deliver greater performance with low latency Target wake time (TWT) significantly improves network efficiency and device battery life, including IoT devices 1024 quadrature amplitude modulation mode (1024- QAM) increases throughput for emerging, bandwidth intensive uses by encoding more data in the same amount of spectrum Transmit beam forming enables higher data rates at a given range to increase network capacity Advancement of Wi-Fi Disadvantages of Wifi: Security – To combat this consideration, wireless networks may choose to utilize some of the various encryption technologies available. Some of the more commonly utilized encryption methods, however, are known to have weaknesses that a dedicated adversary can compromise. Range – The typical range of a common 802.11g network with standard equipment is on the order of tens of meters. While sufficient for a typical home, it will be insufficient in a larger structure. To obtain additional range, repeaters or additional access points will have to be purchased. Costs for these items can add up quickly. Reliability – Like any radio frequency transmission, wireless networking signals are subject to a wide variety of interference, as well as complex propagation effects that are beyond the control of the network administrator. Speed – The speed on most wireless networks (typically 1-54 Mbps) is far slower than even the slowest common wired networks (100Mbps up to several Gbps). However, in specialized environments, the throughput of a wired network might be necessary.
- 5. GSM Advantages: More suitable network with robust features. No roaming charges on International calls. Worldwide connectivity and extensive coverage. SAIC and DAIC techniques used in GSM provide very high transmission quality. The phone works based on the SIM card so that it is easy to change the different varieties of phones by users. GSM signals don't have any deterioration. Easy to integrate GSM with other wireless technology such as CDMA and LTE. It has the ability to use repeaters. Because of the pulse nature of transmission talk time is generally high. Disadvantages: Bandwidth lag because of multiple users shares the same bandwidth so the transmission can encounter interface. It can interfere with certain electronics, such as hearing aids that are due to pulse transmission technology. As a result, many locations, such as hospitals, airports and petrol pumps require cell phones to be turned off. To increase coverage repeaters are required to be installed. It provided limited data rate capability so for high data rate advanced version of GSM devices are used. Many of GSM technology is patented by Qualcomm thus license needs to be obtained from them. Manufacturers are not releasing IS-95 devices due to the lack of a big market so IS- 95 is normally installed in the small tower. GSM has fixed maximum call sites range up to 35 km that is very limited. There is no end-to-end encryption of user data. Several incompatibilities within the GSM standards. Electromagnetic radiation is more with the use of GSM. Microcells affected by the multipath signal loss. The Global System for Mobile Communications (GSM) is a standard developed by the European Telecommunications Standards Institute (ETSI) to describe the protocols for second-generation (2G) digital cellular networks used by mobile devices such as mobile phones and tablets. It was first deployed in Finland in December 1991. By the mid-2010s, it became a global standard for mobile communications achieving over 90% market share, and operating in over 193 countries and territories. GSM Features Phone call encryption, Data networking, Caller ID, Call forwarding, Call waiting, SMS, and Conferencing.
- 6. GPRS Advantages GPRS brought mobile users out of the usual society and into the WAP world, and the internet finally comes inside the mobile to rule the world. An enormous amount of information can be exchanged from and to the mobile over the internet by applying GPRS. It enabled mobile phones with compact and portable internet links for laptops. In a few cases, access to the internet is not available instantly, but the GPRS acts as a lifesaver in mobile networks. Most mobile can be implemented as a modem when once connected to a laptop; the GPRS will be a great backup option. GPRS access is possible in remote locations; the interaction through GPRS is cheap by using the standard GSM network. The instantaneous messaging services and mail services support the user to send messages for low-cost rates through GPRS connection in substitute to short message services. The clients pay only for transported data and not at the time of the internet connection. It offers wireless services to the internet irrespective of any location at the time of available network signal. It enables the user to browse data using the internet on a laptop or mobile, even accessing a remote location. Using GPRS, the user can connect to the internet constantly. Disadvantages: The technology of GPRS utilizes the GSM of the cellular network to send the data even though when the connection is inactive. The network-related functions cannot be utilized, but the data session operates as usual. It belongs to the B-class GPRS device. When any two radios integrated into the device, it enables both features to execute simultaneously. It belongs to class-A, which is less popular, extensive and expensive. The mobile phones come under the category class-B. The connection of GPRS operates slowly than 56K connections on the laptop. It is due to some restrictions on GPRS. General Packet Radio Service (GPRS) is a packet oriented mobile data standard on the 2G and 3G cellular communication network's global system for mobile communications (GSM). GPRS was established by European Telecommunications Standards Institute (ETSI) in response to the earlier CDPD and i-mode packet-switched cellular technologies. It is now maintained by the 3rd Generation Partnership Project (3GPP). Services offered: GPRS extends the GSM Packet circuit switched data capabilities and makes the following services possible: SMS messaging and broadcasting "Always on" internet access Multimedia messaging service (MMS) Push-to-talk over cellular (PoC) Instant messaging and presence—wireless village Internet applications for smart devices through wireless application protocol (WAP) Point-to-point (P2P) service: inter-networking with the Internet (IP) Point-to-multipoint (P2M) service: point-to- multipoint multicast and point-to-multipoint group calls GPRS Protocol Stack
- 7. Thank You