4th Generation Mobile Phones Information Technology Essay

4th Generation Mobile Phones Information Technology Essay ABSTRACT 4G technology is a transition from the earlier technology i.e. 3G technology and it promises to bring some of the revolutionary changes in the mobile world which will be very favorable for the mobile users. Fasters data and IP packet transmissions and a lot of other applications like high quality voice and multimedia in real-time anywhere across the globe are some incontrovertible features of the 4G mobile phones. This switching of the technologies are promised to be accomplished by the end of this commercial year by a number of mobile carriers like VERIZON and ATT. Thus mobile users will be enjoying the best of the mobile phone technology by the end of the year. 4G technology is supposed to be the best because all the flaws that were experienced in the former ones are tried to eliminate in this one to give the best results to the users. FOURTH GENERATION MOBILE PHONES (4G) INTRODUCTION: Since past some decades cell phone world has experienced a considerable amount of transition. This transition initiated from the First generation (1G) mobile phones carried forward by the 2G and 2.5G mobile phones. Nowadays, people are habituated of using the 3G technology. But the technologies and inventions are ever-restless and therefore the cell phone industry is again hopping with a great speed towards the Fourth generation (4G) technology. 4G mobile phone technology is a complete replacement of wireless communication in 3G technology. Like the transition of 2G technology to 3G technology had increased data-transmission speeds, the transition from  3G  technology to 4G technology promises even higher data rates than existed in previous generations and thus considered to be a successor to 2G and 3G standards. 4G promises voice, data and high-quality multimedia in real-time (streamed) form all the time and anywhere (Fendelman, n.d, Para 03). NOMENCLATURE: The fundamental nature of the service is responsible for the typical nomenclature of the cell phone generations. Analogue technology was flipped from first generation to the digital technology in the second generation. Third generation was designed with multimedia support which is now going to flip to the fourth generation where transmission of data and IP packets is faster than the former generations.A 4G system is expected to provide a comprehensive and secure all-IP based solution where facilities such as IP telephony, ultra-broadband Internet access, gaming services and streamed multimedia may be provided to users (4G and Beyond 3G Technology, n.d. Para 05). Thus switching to the 4G is like moving from a dial up internet connection to a cable or DSL which can make all the works done fasters and faster than the previous ones. 4G marks the end of the traditional CDMA/GSM divide (German, 2010 March 15, Para 04). TYPES: There are 2 main types of 4G one of which is the Long-term evolution LTE and the other one is mobile WI-MAX. LTE: A natural extension of the current 3G technology is the Long-Term Evolution (LTE) which is also referred as the pre-4G technology. Transmission of all data including voice takes place as LTE is architectural design that can send all types of IP packets and data. For a 20 MHz channel the downlink transmission bit rate of LTE up to 100 Mbps and 50 Mbps in the uplink and the bit rate capacity increases for a  Multiple-input multiple-output  (MIMO)( 4G and Beyond 3G Technology,n.d. Para 05). According to German (2010, March 15) some of the well-known mobile carriers in United States like VERIZON and ATT and several across the globe would convert their network to LTE and worlds first publicly available LTE-service was opened in the two Scandinavian capitals  Stockholm  and  Oslo  on the 14 December 2009. VERIZON said that LTE testing in Seattle and Boston has gone well and that it will bring the technology to 25 to 30 markets this year (German, 2010 March 15, Para 06).  Acco rding to the VERIZON, downloading speeds of 40Mbps to 50Mbps and upload speeds of 20Mbps to 25Mbps (German, 2010 March 15, Para 06). However according to Nelson and Pica (2010, March 3) the average speeds will range from 5Mbps to 12Mbps for downloads and 2Mbps to 5Mbps for uploads. In contrast ATT has announced that they will begin LTE testing in this commercial year and launch their network in the upcoming year 2011 (German 2010 March 15, Para 07). LTE is not only being planned to launch by the end of this year in United Stats but also the Telco Mobile One (M1) in Singapore conducted a demo of LTE technical trial. Also NTT Do Como will the first to introduce LTE in Japan this year itself. WI-MAX: WI-MAX is elaborated as Worldwide Interoperability for Microwave Access, and unlike LTE it is not an extension of current cellular system rather its more related to current Wi-Fi technology. The initial version for mobile use is based on the 802.16e wireless standard (Wi-Fi is 802.110) (German, 2010 March 15, Para 11). It has potential for very long range transmission (up to 30 miles) and could offer speeds of about 10Mbps (German, 2010 March 15, Para 11).   Where all the majority mobile carriers are interested in using the LTE the only US carrier to adopt the Wi-max technology is SPRINT. SPRINT has a Wi-max network in 27 cities and shows potential average speeds of 3Mbps to 6Mbps with maximum speed up to 10Mbps. FEATURES: The 4G standards were thought to be introduced in order to facilitate users by some of the most incredible features that includes providing flexible channel bandwidth between 5MHz to 20MHz to a maximum extent up to 40 MHz. Also a data rate of at least 100Mbps between any two locations across the globe. It also promises to provide a maximum Link spectral efficiency in downlink up to 15bit/s/Hz and 6.75bit/s/Hz in uplink which means 1000Mbps in downlink should be possible over less than 67 MHz bandwidth. Furthermore the system spectral efficiency for downlink of 3bit/s/Hz/cell and for uplink it is 2.25 bit/s/Hz/cell. Ultimately 4G has all the flaws recovered that were noticeably found in the former standards. SPECIFICATION: ACCESS TECHNIQUES: 4G exhibited increase in efficiency and ability in terms of the access techniques used for it. Plain TDMA i.e. Time division multiple access and FDMA i.e. Frequency division multiple access were used in he 1G technology. But TDMA is less efficient as it is unable to handle high data rate channels. This is because TDMA requires large guard periods to improve the multipath impact. Similarly there were problems with FDMA as it used more bandwidth to avoid inter-carrier interferences. Thus to overcome these problems in the 2G technology one set along with the combination of TDMA and FDMA other set of access scheme was introduced which is known as the CDMA i.e. Carrier division multiple access. Thereby the system capacity was increased but as a drawback placed a soft limit on it rather than the hard limit (i.e. a CDMA network will not reject new clients when it approaches its limits, resulting in a denial of service to all clients when the network overloads) (Rumney M, 2008). Data rate is increased as this access technique is able to manage multiple path channel. This enabled the third generation systems, such as  IS-2000,  UMTS,  HSXPA,  1xEV-DO,  TD-CDMA  and TD-SCDMA, to use CDMA as the access scheme(Rumney M, 2008). Although CDMA technique seems to be good so far yet it suffers from poor spectral flexibility and computationally intensive time domain equalization for wideband channels. More importance is given to the OFDMA i.e.Orthogonal FDMA, IFDMA i.e. Interleaved FDMA, SFDMA i.e. Single carrier FDMA and MFDMA i.e.Multicarrier FDMA because of the troubles in the traditional FDMA, TDMA and CDMA. The later used access schemes are based on efficient FFT (Fast fourier transform) algorithm and frequency domain equalization which would result in lower number of multiplications/s. Also bandwidth can be controlled and a spectrum can be formed in a flexible way. IPv6 SUPPORT: Circuit switched and packet switched networks are the base of the infrastructure of the 3G where as 4G will be based on packet switching only which would require low latency data transmission. Till the time when 4G will be introduced in the market and be a most used device the process of IPv4 address will be exhausted as a result a new version will be essential so that more wireless enabled devices can be supported. So IPv6 is be used to accomplish this task. By increasing the number of  IP addresses, IPv6 removes the need for  Network Address Translation  (NAT), a method of sharing a limited number of addresses among a larger group of devices, although NAT will still be required to communicate with devices that are on existing  IPv4  networks (Morr, D 2009). SOFTWARE-DESIGN RATIO (SDR): SDR  is one form of open wireless architecture (OWA) (Rumney, 2008). The final version out in the market of the 4G device will be a perfect combination of the former standards. This can be realized efficiently using SDR technology, which is categorized to the area of the radio convergence (Rumney, 2008). INDISTINGUISHABLE ACCOMPLISHMENTS: The 4G iphone which is going to be launched as soon as possible is promised to multitasking which allows accomplishing one of more iphone applications at the same time and also lets to continue the applications running in the background even if the user makes or takes a call. Verizon is launching the 4G phone six months before the expectation because of some of the incontrovertible features of 4G that lures world towards itself. HTC HD3 and HTC HD2 are going to be 4G phones. CONCLUSION: Last but not the least the advancement in technology i.e. transition from the current 3G and 2.5G to 4G will make a drastic change in context of data transmissions which will be able to carried in some fraction of seconds. It will be definitely proved very helpful to the future generations. REFRENCES: Open wireless open mobile. (n.d.) Retrieved from http://4gmobile.com/ Fendelman, A. (n.d.) Retrieved from  http://cellphones.about.com/od/phoneglossary/g/4g.htm).    Choney, S. (2008, April 15) Retrieved from http://www.msnbc.msn.com/id/23902615 4G Phones (n.d.) Retrieved from http://fourgphones.com/ German, K (2010, March 15) Retrieved from http://asia.cnet.com/reviews/mobilephones/0,39050603,62061890,00.htm Att (2010, February 18) Retrieved from http://www.att.com/gen/press-room?pid=4800cdvn=newsnewsarticleid=30536 Pica, T Nelson, J (2010, March 8) Retrieved from http://news.vzw.com/news/2010/03/pr2010-03-02b.html Koh, D (2010, March 3) Retrieved from http://asia.cnet.com/crave/2010/03/03/singapore-may-be-ready-for-lte-as-early-as-q2-2011/ 4G. Retrieved from http://en.wikipedia.org/wiki/4G 4G and Beyond 3G Technology (n.d.) Retrieved from http://www.3g.co.za/content/view/73/33/

Dover Lights

Dover Lights Introduction 1) Have you ever been sitting at home bored looking for something to do? Have you ever wanted to see some paranormal activity that is close to home? 2) Good Morning my name is Micah Thomas 3) Some of you may know the place a) Dover Lights b) I will tell you about i) The history ii) About the spot iii) Encounters 4) I have even had a couple of personal experiences Body 1.History 1) Spanish Conquistadors buried gold in the Ozarks during the war a) The story behind the lights are the Conquistadors searching for the gold and silver they lost b) Conquistadors are thought to have littered the Ozarks in search of the treasures c) Written reports in the 1800’s of settlers finding deposits of silver d) Homesteaders found large deposits of silver seam ) Dover lights are something that has been around since the early 1800’s e) There are written documents from the 1800’s from settlers f) However most locals say the first real reports were in 1930 i) The Works Projects Administration scoured the hill country for stories ii) Civilian Conservation Corps built the rock wall at the overlook where the lights are most often viewed g) In the 1990’s MysteriousReality.Com posted the first film footage ever of the lights iii) Lights moving around bluffs and above the creek h) Around 2000 a camper called in emergency crews because he thought a vehicle had driven off one of the bluffs that rim the valley i) In March 2004 Ted Phillips of the Branson, Missouri from the Center for Physical Trace Evidence photographed what he described as intense and odd-colored lights ) In April 2009, a paranormal group filmed the lights iv) At the time of the filming the water levels were at record levels ruling out and human contamination 2. About the spot 1) Located about 17 miles outside of Dover Arkansas heading north on highway 7 a) Down a lonely stretch of dirt road b) Overlooking Big Piney Creek c) CCC overlooking the valley and creek d) No ele ctricity e) No man made light f) National Forest 2) Things to do g) Camping h) Canoeing i) Hiking j) Beautiful Overlook k) Popular party/drinking spot 3.Encounters 1) ‘’Lantern floating in the air† is what most people describe the light as a) The lights are the Spaniards lanterns they are using to search for the silver and gold i) If you yell out â€Å"we have your treasure† they will sometimes come out and chase up the hill side toward you b) 3 lights all three different colors ii) Red light seen most often iii) Blue light iv) White light 2) Professional sightings c) Have been on several different TV shows v) Discovery’s ghost hunters vi) Arkansas ghost and urban legends ii) Forgotten USA d) All have reported about the same thing viii) 3 lights floating/dancing/racing across the canyon ix)Some have done day time explorations and say the valley is to dense and steep for some human to be doing it e) Some professional and scientist say that it could be gas being let off x) Used to mine sulfur out of the valley years ago xi) Some say the gas could make the glowing 3) Personal sightings f) I have been to the lights about 30 times xii) Seen them about 10 times g) Seen all three lights 5 times ) Seen just the red twice and seen just the white twice i) Been legitimately scared about 30 times Conclusion 1) You now know the a) History of the lights b) Where they are located c) And what some encounters are 2) No one has solid evidence on what this phenomenon really is d) But it is fun to go out and watch i) Weather you believe in ghost ii) Just want to go hang out and get away from town iii) Its always a fun and exciting adventure e) And if you are feeling really brave go up to the edge and yell â€Å"we have your treasure† but get ready to â€Å"run like a little girl†

Absence at school Essay

Students who arrive late for their first class period (7:25 am-8:11 am) DO NOT GO TO THE ATTENDANCE OFFICE. Go directly to class and present a note to your first period teacher signed by your parent/guardian; otherwise, late arrivals will be considered UNEXCUSED. ? Students who arrive late after the first period has concluded should GO DIRECTLY TO THE ATTENDANCE OFFICE. Present a note from your parent or guardian to the Attendance Office. Students who arrive late without a note from home will be marked as UNEXCUSED LATE. I HAVE TO GO TO THE DOCTOR/DENTIST/ORTHODONTIST: WHAT TO DO? ? When you have an early dismissal due to a medical appointment, you must present a signed note from your parent/guardian to the Attendance Office to receive an EARLY DISMISSAL PASS. Sign out at the Attendance Office prior to leaving the school building for your scheduled appointment. Students need to sign out at the Attendance Office for all appointments even if their departure time is during their lunch period. When you return to school from an appointment, you must sign-in at the Attendance Office. You will be issued an EXCUSED PASS to return to your next scheduled class period.? All medical appointments require a note from the doctor’s office when the student returns to school. I’M SICK/INJURED AND CAN’T COME TO SCHOOL: WHAT TO DO? ? When you’re absent from school due to illness or injury, you or your parent are not required to call the school. Instead, you must bring a note signed by your parent/guardian to the Attendance Office within three (3) days after returning to school. ? If you are absent for five or more (5) days due to illness or injury, you must submit a doctor’s note when you return to school. ? If you become ill at school, you must report to the Health Room. Ask a teacher or counselor for a note giving you approval to leave class and visit the Health Room. Students dismissed from school by the Health Room must sign out at the Attendance Office. The Health Room will issue an early dismissal pass to be presented to the Attendance Office. Within three (3) days of returning to school, you must bring a note signed by your parent or guardian to the Attendance Office. Whitman Tip Sheet #5 MY FAMILY WANTS TO TAKE A VACATION WHEN SCHOOL IS IN SESSION: WHAT TO DO? ? Absences due to family vacations are considered as UNEXCUSED unless school administration makes the determination to approve the absence. Your parents must request permission in writing at least one week (5 school days) prior to the anticipated absence. You must bring this written request from your parent/guardian to the Attendance Office. The Attendance Office will issue an approval form (attached to parental note) for you to present to each teacher to initial. The teachers’ initials indicate their agreement to allow you to make-up any assignments missed. The approval form and note then go to the assigned grade level administrator, who makes the final decision to approve or deny your absence. I NEED TO MISS SCHOOL TO VISIT COLLEGES. WHAT TO DO? ? You must present a note to the Attendance Office from a parent/guardian at least one week prior to the requested absence for college visits or participation in college orientation programs. The Attendance Office will issue an approval form for you to obtain each teacher’s approval. You then take this form and the parental note to your grade level administrator for approval. The approval form and parental note are returned to the Attendance Office. You need to limit your visits to colleges so you do not miss too much school. I NEED TO MISS SCHOOL DUE TO PARTICIPATION IN A NON-SCHOOL EVENT. WHAT TO DO? ? A note signed by your parent/guardian must be given to the Attendance Office at least 24 hours in advance. The Attendance Office will issue an approval form for you to obtain each teacher’s approval. You then take this form and the parental note to your grade level administrator for approval. The approval form and parental note are returned to the Attendance Office. WHAT TYPES OF ABSENCES ARE CONSIDERED EXCUSED? The State of Maryland regards the following as lawful absences from school*: ? Student illness ? Death in immediate family ? Court summons ? Religious observances ? Violent/hazardous weather ? Emergencies designated by the Superintendent of Schools ? State emergency ? Work or other activity accepted by school authorities. *Any absences not falling into these categories may or may not be approved. Approval is at the sole discretion of the grade level administrator taking many factors into consideration. Each situation will be reviewed on an individual basis. Whitman Tip Sheet #5 MAKING UP MISSED WORK ? It is the sole responsibility of each student to obtain from the teacher any work missed. The student should request from each teacher a date on which all make-up work for that class is due. Students will receive a zero for missed work if the absence is unexcused. TRUANCY ? Each teacher is responsible for taking attendance daily. At the end of each school day CONNECT ED (Automated Attendance System) will scan the Attendance database for ABSENCES. Any student with an ABSENCE that has not been excused will receive a call home via the automated Attendance system. The call is scheduled to contact parents each evening. AGE OF MAJORITY ? When students reach age 18, the law allows them to sign their own absence notes, but only if the parents agree and sign the required form, which is available from the Attendance Office. The school can rescind the Age of Majority status if the student has too many absences or tardies.

Teenage Driving and Accidents - 1461 Words

â€Å"Everywhere is walking distance if you have the time,† said by Steven Wright. Teenagers look forward to their sixteenth birthday so they are able to drive. Everyone has felt that feeling where they can hardly wait to get behind the wheel and start driving. Little do people know teen drivers are more likely to die from a car accident than from a homicide, suicide, or cancer combined (Littlefield). They are mostly inexperienced with the road and how to handle distractions. If the age were moved to eighteen teenagers would have more driving experience (Sostarecz). Teenage drivers are extremely eager to drive because of freedom, but they are not aware of the distractions and peer pressure on the road; their experience of driving is not as well†¦show more content†¦The main distraction in a car is the cell phone; 11% of teenage drivers in fatal crashes were distracted and 21% were distracted by the cell phone (Rocky). Teenagers will mainly use cell phones to keep in c ontact with friends when they drive (Sostarecz). Other near crashed victims say it was the cause of texting, eating, or not paying attention to the road (Littlefield). Some teenagers are not aware of the road signs and are not able to identify things that more experienced drivers can. Teenagers do not look around to see their surroundings causing car accidents (Emmer). If the driver is not aware of his or her surroundings all people in the vicinity are at risk of getting injured. Another example of distractions and peer-pressure is intoxication. An example of this is when a teenage girl did not look around her and hit someone on their motorcycle causing them to go into a coma (Emmer). They were able to blood test the girl and saw that she had been intoxicated by marijuana. This may not have been peer-pressure, but it was a foolish decision made by an inexperienced teenager. 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