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Which of the following is the best 4G technology? Clarify the relationship between FDD and TDD (1)

upload and download. The advantage is that FDD saves a lot of time and consumes more resources (in fact, TDD needs to reserve a large protection band to avoid interference and consume some resources ). Because it is a "one-way street" that runs two-way "traffic flow", TDD can only control traffic through time (Time Division Duplex), so that the downloaded traffic will pass through and the uploaded traffic will pass. Many people put TD-SCDMA and TDD together, in fact, there is no relationship be

How is the development of 4G + operator?

How is the development of 4G + operator? In the recent period, 4G + has become a keyword that the three major domestic operators are scrambling to mention. The so-called 4G +, is the LTE-A (LTE-Advancde), is based on the original 4G network, the use of carrier aggregation technology (CA), further expand the network spectrum, network quality optimization, in essence, 4G + is the evolution of 4G technology.

Tell me about the 4G that looks good.

Recently in the project to use mobile terminal equipment, naturally inevitably need to remove the mobile network problems.Saying that many leaders actually do not know the technology, always like blind pursuit of new, like to discuss 4G.In fact, through my many aspects of understanding, (well ~ My daughter-in-law also want to start a kidney six, so carefully analyzed a bit)In fact, 4G is still in a very impractical stage, so we still choose to Unicom 3G best.In fact, now so-called Fdd-

4G new-generation broadband wireless network investment

Cao Shumin, member of the CPPCC National Committee and vice president of the Institute of Telecommunications, said yesterday that, as the only major national science and technology project in the communication industry, "Next-generation broadband wireless mobile communication network" will obtain at least 2 billion yuan of national financial investment this year and next, and the initial funding for enterprises and local support is estimated to be about 10 billion yuan.This project sup

"Turn" 4G mobile phone call why will break network 4G Internet and call cannot coexist cause analysis

Compared with 2g/3g, 4G is the biggest feature is to provide a peak rate of more than 100Mbps, since the speed can be off 20M of fiber-optic fixed network, that used for voice calls is a piece of cake? Unfortunately, this is where the problem arises.Because the current LTE network (4G) does not support voice services, so whether it is Td-lte (mobile 4G) or Fdd-lte

Using the Internet type from the Android end

Android's use of the Web type, which is preferred network mode, is stored in the Settingsprovider. Of course, the modem will also save a copy, but according to the Android design, the settingsprovider stored in the user set value as the main, if the AP core and modem is not synchronized, will be the AP core host to the modem side of the request. from Android M Start , Android Settingsprovider storage mode is changed from the original databases Swap XML Files , so , We just need to change the way

JavaScript handles HTML DOM

Originally just want to write a blog post, finally get like refactoring, the more do the more dissatisfied, first of all:) HTML dom-javascript processing HTML DOM Get HTML element Changing HTML elements Adding or deleting HTML elements Add Event Handling Get HTML Object Some properties NodeType Constants other Do not recommend using+Hover Show details get HTML element +s

An optimization method for paging display of data query

Existing methods: Start time [@start_dt] End time [@end_dt] other conditions [] Total query data: [XXXX] 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19-20 Disadvantages: If you have 1000 data, each page shows 50, you need to display 20 page connections. The query needs to query a total amount of data first: Db.coll_name.find ({date:

MongoDB's query operation

conditions.5.5 Queries with sub-documents in the arrayWhen the array contains sub-documents, you can also construct query criteria for the fields in those sub-documents.Use array subscripts to navigate to specific subdocumentsThe query condition in this way is to use both the subscript representation of the array and the dot number (.) of the field in the document. notation to specify a field in a subdocument in an array. It's a bit of a detour, let's take a look at concrete examples.Db.users.f

MongoDB command use Daquan (common commands)

* from UserInfo where >22; 5. Check the records of age Db.userInfo.find ({age: {$lt: 22}});Equivalent to: SELECT * from UserInfo where 6. Check the records of age >= 25Db.userInfo.find ({age: {$gte: 25}});Equivalent to: SELECT * from UserInfo where age >= 25; 7. Check the records of age Db.userInfo.find ({age: {$lte: 25}}); 8. Query age >= 23 and age Db.userInfo.find ({age: {$gte: $lte: 26}}); 9. Query th

Basic use of MongoDB

db.userInfo.find({age: {$gte: 25}}); Equivalent to: select * from userInfo where age> = 25; 7. query records of age db.userInfo.find({age: {$lte: 25}}); 8. query age> = 23 and age db.userInfo.find({age: {$gte: 23, $lte: 26}}); 9. query data whose name contains mongo db.userInfo.find({name: /mongo/}); // Equivalent to % select * from userInfo where name like ‘%mongo%’; 10. query names starting with mongo

How does one configure the Samsung Note7 edition? How does one test the performance of the Samsung Note7 edition?

Samsung Galaxy Note 7 (n9300/full netcom) Basic parameters Listing Date August 2016 Mobile Phone Type 4G mobile phone, 3G mobile phone, smartphone, tablet phone, camera phone, ventilation phone, mobile phone screen touch screen type capacitive screen, multi-touch main screen size 5.7 in. main screen material

Boot USB drive should do this

Everyone should have at least one bootable USB flash drive, so that you can get the most out of it, whether it's installing the system or troubleshooting it.So how to start the USB flash drive How to make it? In the view of LTE learning Ambassador Sun teacher, there are three ways of making:The first kind: the small white commonly used method, is uses various launches the special production tool of the USB stick, for example old peaches, the Chinese c

MongoDB Basic command with

;>= 25 of recordsDB. userInfo. Find({age: {$gte: 25}});Equivalent:select>=;= 25 of recordsDB. userInfo. Find({age: {$lte: 25}});> = 26DB. userInfo. Find({age: {$gte: $lte: 26}});9. Query the data containing MONGO in nameDB. userInfo. Find({name:/mongo/});Equal to percentSelect * from UserInfo where name is like '%mongo% ';10, query the name in the beginning of MONGODB. userInfo. Find({name:/^mongo/});Select

How to transmit the microwave of 4G network

Microwave Transmission Microwave transmission is one of the most flexible, the most adaptable means of communication, with fast construction, small investment and flexible application, microwave transmission is not only widely used in mobile networks, but also favored by fixed network operators. Widely used in radio and television, security video surveillance transmission, control and so on. China also has the backbone of the national microwave link. On December 4, 2013, the Ministry of Indust

Glory Magic How to install SIM card? Glory Magic Sim Card method

It will be the end of this year, Huawei has put a big move, launched the glorious Magic mobile phone. Presumably a lot of people have already started. The first thing to start with is to install a SIM card. So, how about the Glory Magic SIM card? Below, and small weave together to see the Glory Magic installed SIM card method. First, Glory Magic Card information: Network format Network, the Glory Magic is a full netcom smartphone, and support dual-card double, while supporting Mobile, Unico

South Korea to successfully develop the 3.9 generation of mobile communications systems leading the world

Transferred from: http://www.cnbeta.com/articles/48325.htm South Korea's research team has successfully developed a next-generation mobile communication system that can transmit a variety of information in a 120-kilometer high-speed movement, said 30th (ETRI). 3GPP (3Generation Partnership Project) long-term Evolution plan (LTE Long term Evolution) "and was the first to complete auditions worldwide. Yonhap noted that the "3GPP

MongoDB basic Commands

after the query is removed ("name"); Filtering out the same data in name is equivalent to:SelectDistict Name fromUserInfo; 3, Query age =22 of Records Db.userInfo.find ({" Age": A}); Equivalent to:Select* fromUserInfowhereAge = A; 4, Query Age >22 of Records Db.userInfo.find ({age: {$gt: A}}); Equivalent to:Select* fromUserInfowhereAge > A; 5, Query Age 22 of Records Db.userInfo.find ({age: {$lt: A}}); Equivalent to:Select* fromUserInfowhereAge A; 6, Query Age >=25 of Records Db.userInfo.find

MongoDB basic commands are used

({age: {$gt: 22}});Equivalent to: SELECT * from UserInfo where >22;5. Check the records of age Db.userInfo.find ({age: {$lt: 22}});Equivalent to: SELECT * from UserInfo where 6. Check the records of age >= 25Db.userInfo.find ({age: {$gte: 25}});Equivalent to: SELECT * from UserInfo where age >= 25; 7. Check the records of age Db.userInfo.find ({age: {$lte: 25}});8. Query age >= 23 and age Db.userInfo.find ({age: {$gte: $

MongoDB Basic command with

: {$gt: 22}});Equivalent to: SELECT * from UserInfo where >22;5. Check the records of age Db.userInfo.find ({age: {$lt: 22}});Equivalent to: SELECT * from UserInfo where 6. Check the records of age >= 25Db.userInfo.find ({age: {$gte: 25}});Equivalent to: SELECT * from UserInfo where age >= 25;7. Check the records of age Db.userInfo.find ({age: {$lte: 25}});8. Query age >= 23 and age Db.userInfo.find ({age: {$gte: $

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