2.1     DEFINITIONMobile Computing is an umbrella term used to describe technologies that enable people

to access network services anyplace, anytime, and anywhere. Ubiquitous computing and nomadic computing are synonymous with mobile computing. Information access via a mobile device is plagued by low available bandwidth, poor connection maintenence, poor security, and addressing problems. Unlike their wired counterparts, design of software for mobile devices must consider resource limitation, battery power and display size. Consequently, new hardware and software techniques must be developed.

2.2 SPECIFICATION, SERVIS AND FREQUENCIES OF MOBILE COMPUTING

SPECIFICATION OS: Android OS, v4.2 (Jelly Bean)

Chipset: Mediatek MT6589TCPU: Quad-core 1.5 GHz Cortex A7GPU: PowerVR SGX544MP2Sensors: Accelerometer, proximity, compass

SERVICES Messaging: SMS(threaded view), MMS, Email, Push Mail, IM, RSSBrowser: HTML5Radio: FM radioGPS: Yes, with A-GPS supportJava: Yes, via Java MIDP emulator-Google Search, Maps, Gmail,-YouTube, Calendar, Google Talk

FREQUENCIES 2G Network: GSM 850 / 900 / 1800 / 19003G Network: HSDPA 850 / 1900 4G Network: HSDPA 900 / 2100Speed: HSDPA, 21 Mbps; HSUPA, 5.76 MbpsWLAN: Wi-Fi 802.11 b/g/n, Wi-Fi hotspotBluetooth: Yes, v3.0 with A2DPUSB: Yes, microUSB v2.0, USB On-the-go

3.0 INTERNET TECHNOLOGY AND SERVICES

3.1 VoIP

Voice Over IP is a telephone service that uses the Internet as a global telephone network. Many companies, including Vonage, 8×8 and AT&T (CallVantage), typically offer calling within the country for a fixed fee and a low per-minute charge for international. Broadband Internet access (cable or DSL) is required, and regular house phones plug into an analog telephone adapter (ATA) provided by the company or purchased from a third party.

3.2 BLOG

A blog is a lot like a journal except it is generally intended to be read by others. The topics for blogs vary greatly; some being about day to day activities and others taking a more corporate or political slant. There is no defined or widely accepted format and so blogs range from one liners that the author adds every few hours to relatively long, well thought out arguments for or against a topic of interest.

4.0 TYPE OF NETWORK

4.1 PAN

A Personal Area Network (PAN) is a computer network used for communication among computer devices (including telephones and personal digital assistants) close to one person. The devices may or may not belong to the person in question. The reach of a PAN is typically a few meters. PANs can be used for communication among the personal devices themselves (intrapersonal communication), or for connecting to a higher level network and the Internet (an uplink). Personal area networks may be wired with computer buses such asUSB and FireWire. A wireless personal area network (WPAN) can also be made possible with network technologies such as IrDA and Bluetooth.

4.2 VPN

Short for (Virtual Private Network), VPN is a type of network that allows a user to connect to a network through a tunneling protocol and access internal internet and intranet web sites and e-mail. Virtual Private Networks are commonly used to allow an employee with a large company to connect to the company’s intranet.

4.3 WLAN

A Wireless Local Area Network, sometimes referred to as LAWN ( local area wireless network ) is one in which a mobile user can connect to a local area network (LAN) through a wireless (radio) connection. The IEEE 802.11 group of standards specify the technologies for wireless LANs. 802.11 standards use the Ethernetprotocol and CSMA/CA (carrier sense multiple access with collision avoidance) for path sharing and include an encryption method, the Wired Equivalent Privacy algorithm. A personal area network.

4.4 WIMAX

WiMax is the industry term for a long-range wireless networking standard. WiMax technology has the potential to deliver high-speed Internet access to rural areas and other locations not serviced by cable or DSL technology. WiMax also offers an alternative to satellite Internet services.WiMax technology is based on the IEEE 802.16 WANcommunications standard. WiMax signals can function over a distance of several miles / kilometers. Data rates for WiMax can reach up to 75 megabits per second (Mb/s). A number of wireless signaling options exist ranging anywhere from the 2 GHz range up to 66 GHz.

5.0 CONCLUSION

Mobile computing (like the peer to peer transaction model did) brings about a new paradigm of distributed computing in which communication may be achieved through wireless networks and users can compute even as they relocate from one support environment to another. The impact of mobile computing on systems design goes beyond the networking level and directly effects data management. Although being a relatively new area, mobile data management has attracted a lot of research efforts, motivated by both a great market potential and by many challenging research problem.

REFERENCE

http://www.wimax.com/deployment/network

http://en.wikipedia.org/wiki/Computer_network