According to the latest GSA data, as of July 16 this year, 194 commercial LTE networks have been deployed globally, an increase of 48 networks compared to the end of last year, and the number of LTE users has exceeded 100 million.
As one of the world's largest mobile communications markets, China's LTE network construction is destined to be a hot topic this year. At present, Chinese operators and various parties in the industry are actively deploying LTE network and terminal testing. Taking China Mobile as an example, Xi Guohua, chairman of China Mobile, once said that by the end of this year, China's LTE TDD network will cover more than 100 cities, and the purchase of LTE terminals will exceed 1 million. Xi Guohua believes that 4G LTE, which integrates TDD and FDD, will bring unprecedented development opportunities for the entire industry chain.
In addition, China Mobile has emphasized on many occasions that it is necessary to build LTE "quality networks" "rapidly and efficiently", to expand and enhance the international influence of LTE TDD technology on a global scale, and to promote the global deployment and promotion of LTE TDD through industrial cooperation .
1000 times and 25 billion
Why develop LTE network? We might as well look at a few data. 1000 times-Qualcomm Chairman and CEO Dr. Paul Jacobs said in a speech earlier, "Global mobile data traffic will achieve substantial growth, and we must prepare for a 1,000-fold increase in the future"; 25 billion ——By 2020, there will be 25 billion devices connected to the world. This data also comes from Qualcomm's prediction.
Similar to the "1000 times" statement, China Mobile Chairman Xi Guohua recently said that the rapid development of mobile smart terminals has become the most important way to access the Internet. In 2012, China Mobile's data traffic increased by 187%. "Operators have already Entering the era of traffic operations. "According to Ericsson's report, from the fourth quarter of 2012 to the first quarter of 2013, the quarterly growth rate of global data traffic was 19%, while the growth of voice traffic was only 4%.
From the perspective of industrialization, mobile communication technologies represented by LTE and subsequent evolution are destined to be the source of power technology to support the rapid rise of the Internet of Things. Wang Xiaochu, chairman of China Telecom Group Corporation, recently said that Internet + renewable energy will bring the third industrial revolution in human history, and "the vigorous development of mobile Internet will promote the formation of the third industrial revolution."
Multi-mode multi-frequency is the focus of LTE development
That's right, LTE is a development trend, and building a premium network with a demonstration effect on a global scale is an important appeal of Chinese operators. So from a terminal perspective, what are the key points and directions of development? We can observe several recently released LTE star terminals.
Samsung has released several of the latest phones in the Galaxy S4 series. Galaxy S4 LTE-A——Supports LTE-A / WCDMA / GSM, using LTE carrier aggregation technology, which can double the LTE data transmission rate up to 150Mbps. This phone uses the Snapdragon 800 processor integrated Qualcomm's third-generation 4G LTE modem; Galaxy S4 AcTIve-using the Snapdragon 600 processor, the media said, "Whether it is an LTE network in the 2, 4, 5, 7 band, or HSPA + (850/1900/2100) and dual band GSM / EDGE networks are perfectly compatible "; Galaxy S4 mini-supports LTE / HSPA + / GSM, and this phone will also have a dual SIM card version, using the Snapdragon 400 processor.
(Pic: Galaxy S4 LTE-A)
Indeed, supporting LTE / 3G multi-mode and multi-frequency is the clear development direction of LTE terminals, and the same is true in China. Tianyu Longtong ’s newly released Tianyu Touch 1 smartphone, using the Snapdragon 400 processor, supports LTE TDD / LTE FDD / WCDMA / TD-SCDMA / GSM multimode and multiband; and Sony ’s first LTE TDD smartphone for China Mobile Xperia SP M35t supports WCDMA band 1/2/5/8, LTE FDD band 3/7, GSM GPRS / EDGE 850, 900, 1800, 1900MHz, LTE TDD band 38/39/40/41 and TD-SCDMA band 34 / 39, using the Snapdragon S4 series processor; also using the Snapdragon S4 processor, Coolpad also recently launched a support for "five-mode 13-band" smartphone 8920.
Multi-mode multi-frequency is also the development idea of ​​China Mobile and other operators. According to media reports, China Mobile released multiple LTE TDD terminals during MWC. The media said that these terminals support LTE TDD, LTE FDD, TD-SCDMA, WCDMA, GSM, etc., and support TD-LTE Band38 / 39/40/41, TD-SCDMA Band34 / 39, WCDMA Band1 / 2/5, FDD LTE Band7 / 3/1/17, GSM Band2 / 3/8 and other frequency bands, Qualcomm The processor provided "strong power" for the launch.
At present, all Qualcomm LTE chipsets support both LTE TDD and LTE FDD. In LTE / 3G multi-mode, the Qualcomm third-generation modem Gobi MDM9x25 is used as an example to support LTE Rel10, HSPA + Rel10, 1x / DO, TD-SCDMA, GSM / EDGE; In addition, the Qualcomm Snapdragon 800 series processors that emphasize "high integration" and "single chip" also integrate Gobi 9x25 modulation and demodulation solutions. At present, there are more than 150 smart terminals using the third-generation modulation and demodulation scheme are under development.
"40 frequency bands" is a difficult problem in LTE terminal design
Regarding multi-mode and multi-frequency, the industry generally believes that the inconsistency of frequency bands is the biggest obstacle to the design of LTE terminals in the world today. At present, the diversity of the global 2G, 3G, and 4G LTE network frequency bands poses challenges to mobile terminal development. Global 2G and 3G technologies each use 4 to 5 different frequency bands. With 4G LTE, the total number of network frequency bands is nearly 40.
Qualcomm recently launched the RF360 RF front-end solution, which can alleviate this problem while improving RF performance, helping OEM manufacturers to more easily develop and support all seven network standards (LTE-FDD, LTE-TDD, WCDMA, EV- DO, CDMA 1x, TD-SCDMA and GSM / EDGE) multi-frequency multi-mode mobile terminals. Qualcomm anticipates that OEM manufacturers using the complete RF360 solution will launch in the second half of 2013.
It is also worth noting that Qualcomm has launched a new RF transceiver chip WTR1625L, which is the industry ’s first product that supports carrier aggregation and significantly increases the number of frequency bands it can support. WTR1625L will support all cellular modes and all frequency bands and frequency band combinations that have been deployed in the world or are in commercial planning for 2G, 3G and 4G / LTE. In addition, it also has an integrated high-performance GPS core that supports GLONASS and Beidou satellite navigation systems.
LTE and 3G evolution are synchronized
Practice has proved that the OFDMA modulation method adopted by LTE is excellent in providing a higher data transmission rate with a larger bandwidth. LTE's low-overhead resource management design optimizes the use of OFDMA, resulting in high spectral efficiency (data capacity). LTE's powerful mobility and seamless handover capabilities also fully demonstrate its superiority over other OFDMA solutions. At the same time, 3G and its evolution technology will continue to provide ubiquitous broadband coverage and voice services outside the LTE area-recent growth in the number of users and revenue of many major operators proves that mobile broadband based on HSPA and EV-DO The service has achieved great success. Taking WCDMA evolution as an example, according to GSA statistics, as of May, 315 HSPA + networks have been deployed worldwide, and 42Mbps dual-carrier HSPA + networks are also increasing, currently reaching 134.
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