Homework 10-25-2008

HomeWork Report :Homework 10-25-2008

Chinese name :曹志信

English name : Gordon

Student number : 9776611

Summarize 3GPP LTE in 200 words.

 

This year new wireless network norm (3GPP) Put out a technological LTE again, uses and opposes it with Wimax main forces that Intel led, the wireless communication products are combined at present (GSM/EDGE, WCDMA , HSPA , UMT/HSXPA (2Gà3G) )The high-speed data transmission equipment is the demand of LTE. Service that LTE offers in Voice, image, upload the data transmission downloading at present, can meet all of future use's demands.

LTE finishes normal verification in 2008, it is estimated that supports all action communication apparatuses after 2011 years. Though the products of Wimax have already appeared on the market careful and long, the maturity of apparatus compatibility has not been sound yet, lead to the fact that has not totally eaten early Mimo or WLAN market any more pursuing for several years yet, so will see the competitions of Wimax and LTE in recent years.

The wireless network brings the service content of data transmission, lie between to enjoy the facility of the network by the mobile phone or NB, but consider to the mobile phone to correspond to it to LTE, NB uses under the condition of Wimax ,The uploading / downloading the counting rate of the materials. And the most effective doing in the test amount with the electricity of province, according to present specification, follow-up LTE is expected to rise, because I like the network of using whenever and wherever possible, but does not hope to change the inclusive establishment value of system whenever and wherever possible.

HomeWork Report : Homework 10-4-2008

HomeWork Report :Homework 10-4-2008

Chinese name :曹志信

English name : Gordon

Student number : 9776611

 

1.    Why 2G is faster than 1G?

Response :

1G Cellular characteristic

A. First ancestor initially of the wireless communication

B. Utilize AMPS technology, cover the frequency of utilization again

C. Transmit in order to imitate the signal

D. High unit price

5. There is few amount of user used

2G Cellular characteristic

A. Few keynote of the amount of user improved

B. Utilize TDMS technology, within different time, can utilize frequency further, make rate of utilization raise

C. Transmit the digit signal

Utilize 2G (TMDA) Advantage

A. Can increase communication users' quantity

B. Security is improved

C. The support of the service is good: Service of adding value such as the pronunciation, data, information, the fax

Utilize using the special bee nest type action communication network finally, is called the ' platform on bases of little cell ' to form cell dose that the form is like the hexagon by a lot of, and can roam world, can be regarded as and reach the real action communication.

The above talks to regard manufacturer's development technology as and consider, general users are by listening to, speak, spread the news in brief, considering finally regard news as the main fact, so the development of science and technology, can let interpersonal interdynamic close.

2.Why cellular is better than broadcast?
Response :
Broadcast rely mainly on the fact that frequency is cut at the technology, in use particular users the frequency cut, as to users amount few 。

TDMA forms the time matrix of frequency with the system, produces a lot of time slots on every frequency at Cellular technology, every these matrix a passway at all, under the circumstances that the base station is controlled and distributes, is it or not business to offer the telephone to an arbitrary movement customer or promote the systematic capacity.

As for development of the communication, just enable more persons to transmit information each other, that novel science and technology can replace the old products, let the mankind enjoy science and technology to come all the time as for the human nature.

Note:

TDMA technology:

It is Time-Division Multiple Access that English is written completely. Regard communicating in sound as the example, as its name suggests, TDMA technology is to stagger the time that each spokesman makes a speech. That is to say can only someone make a speech at the same time, such sound of spokesman can interfere with, and clear janitor. Liken the telephone system of the action to the general meeting occasion. The platform of mobile phone base can be likened to a president, and user likens the mobile phone to the persons who participate in having a meeting. When a lot of people want to make a speech at the same time, presidents can assign order and time that everybody make a speech, and each spokesman makes a speech in accordance with the time assigning, can avoid the noisy situation that have a meeting and often have so. Certainly while using the mobile phone, the user will have no feeling that timesharing makes a speech, the reason is the frequency switched over in this kind of timesharing quickly, and after the sound compresses via the digit, so long as short time can convey on behalf of a certain period of voice signals out very, other time distribute other user.

 

3. Describe a short history of development of cellular technology from 1G to 3G with a prediction of 4G and beyond.

Response :

Begun research and development by Bell Lab, by the early military use, regard as the portable technology of conveying pronunciation and information, develop the 1st generation of mobile communication equipment during that time,Cutting frequency, giving to users, but the shortcoming is that there are few high unit price and user amount, semiconductor technology fast growing later on, channel mobile communication equipment into, make Cheng,

Reduce cost and construction period effectively, and it is to stagger the time that each spokesman makes a speech to develop TDMA technology. That is to say that there can only be a person's speech at the same time ,Such spokesman's voice will not be interfered with, and the clear janitor. The frequency that timesharing switch over quickly, and after sound compress via the digit, So long as short time can convey on behalf of a certain period of voice signals out very, other time distribute other user. Use a quantity to improve to improve with the rate of utilization of frequency. 

     Take TDMA and CDMA as the core in the development of 2G, in the technology frequently of exhibition of this introduction CDMA

(Code-Division Multiple Access ) ,But it is initial to begin, its system will need high power and communication distance to interfere with questions such as other users,etc., 

Find out the way to solve here too;

1.Power Control: Cooperate with the distance of the products, automation controls Gain Value.

2.Hand off : Make use of technology of the encoder to improve dead time, increase the systematic capacity.

        After finishing introducing the communication system, introduce performing the special of algorithm of it at the same time, there is frequency, time many troughs, regard other information as background noise while conversing. 

        3G action communication era comes and echoes ' the mobile phone of multimedia will be employed ' the opportunity, multimedia, game, the image is transmitted, digit TV  Wait for application, 4G it will whether ' mobile phone network ' add ' the wide-band network ' to two loud combination that employed. Data (data) originally in the network Materials, will apply to the demand of moving ,Combine with the pronunciation (voice) on the original mobile phone Materials, all networks (IP) Melt.

 

4. Read the article that discussed the future of mobile social networks.

Response :

The present person is because of the relation with busy work, less and true social personnel communicate and share, but make use of MySpace and FaceBook social network to contact other people.

    The advantage on the network is at present: Can store any place arbitrarily on the network, then share to other users open, or in order to have a look around the information of the other one, if meet the theme of interest, can exchange information each other, reach the speciality of helping each other.

    The development of this network can be used in the mobile phone products at present, transmit or receive the personal communication message with the bluetooth function of the mobile phone, can obtain hotel owner's newer products advantage in the network at the same time. Other application is GPS way, may help you to orientate the function, certainly can set up the blacklist in this network too, avoid meeting the personages that harasses.

social networks: Future trend, the network will carry out amalgamation to enable more users to exchange with other networks, can know more interesting persons, mainstreams of workings, things by reaching network of utilizing. 

Homework 9-27-2008

HomeWork Report
Chinese name :曹志信
English name : Gordon
Student number : 9776611

1. Install Google Browser Google Chrome and Firefox 3.0, try a few websites and compare their performance. For example, youtube, blogspot, msn, and yahoo.

Ans.
In the world of the internet network, there is few browser software at present, carry on the plan of the open source code, for instance companies such as apple wekit and Mozilla Firefox and Google Chrome,etc., it make internet the networks it last engine it stick to enter at people demand further with and looking for information most more high-efficiency. Introduce to two browsers among them in course, I utilize this browser to carry on the demand of the use habit that I often surf the Net on ordinary days, to verify the advantages and characteristics of two of Mozilla Firefox and Google Chrome, with youtube, blogspot, msn, and yahoo. carries on the difference to compare. I more often use IE7 to regard as the main browser software at present, but feel inconvenient deeply to let other IE webpages crash to drive webpages sometimes to it, after finishing course, use these two suits of software, find its characteristic is: Google Chrome : 1. Can type materials or webpage that you wanted to look for,etc. in the website district directly 2. Relatively IE materials search the fast and correct rate to raise 3. Can set up the application software of Google directly the line of shortcut and get on the network and move ahead simultaneously 4. Can carry on many paging ways, exchange and arrange and join and pull out the function of paging 5. But set up in the webpage that is lost, set up and close it, but not all is closed 6. As to problematic websites, will tell and inscroll in advance 7. Can use similar webpage download, management message that download their Firefox 3.0 1. Spend bookmark way conveying instant network information to the user in the shortest time 2. Inscroll Email way relatively IE fast 3. Will record the websites that will inscroll in the near future, and will publish the record on the new webpage beautifully After using the browsers of Mozilla Firefox and Google Chrome, both ones one is characteristic, but if I choose the browser that use, then I will select Google Chrome, because use the application software of Google relatively long, and the application software supported is very convenient, so long as can enable resource-sharing, reach convenience with the ethnicity.


2. Subscribe to our course website by Google reader, put the Google reader block on your iGoogle.
Ans. My webpage appears by way of picture .

3.Comment on the article Serious potential in Google's Browser

Ans.

While leaning towards the article in this one, hosts are speaking the key value that the browser is existing, only offer the ability to work of the simple and easy network line with the present browser interface, as to now internet network day new different message; If the network swindles money, hacker's software and virus, one let people experience the unable sense of the browser relatively, but Google has enough information and ability can improve any question that will be met on the network, the browser utilizing Google to pursue newly can improve this question, and emphasize humanized use, there is interdynamic type software that employs interfaces, make us by paying the utmost attention to changing the browser.
Google lists several advantages such as Email here, and browse through the information of the network and application software of the internet network, the picture of using that it is dull to improve the early network interface in Email, Google adopts humanization now, there are instant warning menus if using, let the person that uses for the first time grasp ahead of time. Browsing through the information of the network, will demonstrate the webpage that you will browse through in the near future, and while searching for the materials, will look for the materials with the commonly used network, reduce the time that the materials search for and improve efficiency. The application software of the internet network, let the network software lie between the media used the taking off machine by this software
Google Chrome changes people's use habit to the network, downloads the materials in for example the early webpage, after download is finished, if the user forgets and puts the position, then the download again of demand, make people feel convenient, but Google Chrome improve question this, after when whom you download, will go on, record and deposit position remind, let people feel, humanize on webpage. Browser need have security and novel break-through of technology, let, use people feel convenient to can take this browser as the core even more, will irritate the rival with time, press close to even more the software interface that the mankind used.


4. Watch the video recording of Larry Page's "Broadband for the future."

9-20 till 9-27 Homework by 9776611

PerComm 2007 homeWork Report
Chinese name :曹志信
English name : Gordon (The old English name is Robert)
Student number : 9776611

From the bulletin of Nokia, does development to know communication system evolves, and clearly understand that changes people? The way to communicate with each other, by hearing at the beginning, say, to using the exchanger to reach the point-to-point technology that hear of in step behind.

To wireless from wired communication apparatus change to later stage, emphasize science and technology is always in innovating, bulletin introduce current mobile phone function of new invention, GPS make a reservation till now can spend video-information or surf the Net from map for initial stage function inquire latest message that parking for instance, with controlling air pollution index,etc..

Portable handheld communication apparatus whether people hang on scientific and technological result borned to think everyday, it is the most obvious too to develop to science and technology, after when innovative science and technology, how is it to attract people's eyes, and pay attention to the convenience that science and technology bring.

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Kai-Fu_Lee_-_Google_Keynote,_WWW_2008_Beijing
The main shaft talked about is : " Cloud Computing "

Present people, will involve the relation with the network all the time, hope the network can bring the information wanted to know to me, making use of machine studying new information and technology of application, the technology of that Cloud Computing is changing the occupation mode that people use the internet network.

The characteristic of Cloud Computing: Store the materials or data in Cloud Computing, user's end and some and has not opened the place of the position of server, utilizing PC or other peripheral interfaces that can obtain the materials with the line of network to obtain the materials, the software service of the latest technology in Cloud Computing, Google network service.

Introduce Cloud Computing the six characteristic advantages here again
1. User's centre: Make materials accompany by you are can with can up to the situation applicable to all with the type apparatus while being other at the same time at any time.
2. Task centre: Enable different software application of the past, such as the form or mail form is turned into a fixed way, benefit the materials to express it by concrete task way.
3. Powerful: Connect with limitless PC and system in series, let machine store and operation and function of search make operation in step, more early PC is fast
4. Accessible: Can let you do particular searching the concrete type, reach website's information of the proximal network
5. Intelligent: Cloud Computing can make a large number of materials collection and ability of the data analysis.
6. programme: Require the description in the past to follow from the data.

Cloud Computing stand up computer network finally, but also new break-through at academia even more, offer help, reach method that difficult scientific problem solve fast, let internet network new to employ surface to have new break-through too .