"One third of the world" is China Mobile's goal for TD-SCDMA in the domestic 3G market. Now this goal is further pushed to TD-LTE, and its realization space is global. At the "New Generation Broadband Wireless Mobile Communication Development Forum" co-sponsored by the New Generation Broadband Wireless Mobile Communication Network Major Specialized Experts Group and the Telecommunication Research Institute of the Ministry of Industry and Information Technology, Huang Yuhong, Vice President of China Mobile Communications Research Institute, said: -LTE has the foundation for global development, and has the right time, geographical position, and harmony. "Accelerating development and striving for resources is the key to the current industrialization and internationalization of TD-LTE.
The first phase of the test network test ends
In early October, the first phase of the TD-LTE 6 city scale network test has entered the closing period. This test demonstrates the strong industrial support capabilities of TD-LTE. According to Wei Guiming, deputy chief engineer of the Communications Standards Institute of the Telecommunications Research Institute, in terms of system equipment, Huawei, Nokia Siemens Networks, ZTE, Datang, Shanghai Bell, Motorola, Ericsson, and Fiberhome have completed 2.6GHz single system test, 2 & TImes; 2 test , Key technology and field network performance test. Xinyoutong and Putian have completed single system testing and 2 & TImes; 2 testing, and Samsung has completed single system testing.
In terms of chips, the chips of 6 companies including Hisilicon, Chuangyi Video, Qualcomm, Aite, ZTE Microelectronics, and Saiken have completed functional, indoor and outdoor performance, and 2 & TImes; 2 interoperability tests. Lianxin and STMicroelectronics have completed functional testing. Lianxin is conducting indoor performance and interoperability testing. Chongyouxin Branch is conducting functional testing. Spreadtrum is in the state of functional commissioning.
"Different from the TD-SCDMA test period, in addition to the system and terminal, TD-LTE has also developed instrument test links for the development and verification of the TD-LTE terminal conformance test system." Wei Guiming told reporters. In 3GPP international standards, including radio frequency, protocol, and wireless resource management, it is fully synchronized with LTE FDD. The core specification was successfully completed in 2010, the R8 version has been frozen, and TTCN code development has been completed.
In 2011, it was mainly improved on the basis of R9 version and kept in full synchronization with LTE FDD. In the development of the meter, there are more than 10 participants such as Annet and Rod Schwartz. The radio frequency and protocol meters have basically synchronized with LTE FDD, and the radio resource management meter is relatively lagging behind LTE FDD.
In terms of test set verification, the TD-LTE working group strengthened its organization and carried out GCF certification in an orderly manner, narrowing the gap with FDD. Radio frequency and protocol test cases are basically synchronized with LTE FDD, and radio resource management test cases are about half completed compared to LTE FDD.
"Seven system vendors have completed the network construction, and three system vendors are building the network. China Mobile has purchased more than 2,800 terminals for scale trials." Speaking of the overall situation in the first phase of the 6-city scale network trial, Wei Guiming said, " Seven system vendors and three chip vendors have basically completed the first phase of the test, focusing on the four major parts of wireless network performance, multiple antennas, indoor coverage and terminal testing, as well as core network and bearer network testing. "
The TD-LTE test started in 2009 is divided into three major phases. These three phases are connected one by one, making the system equipment from the prototype to the test system to the third stage of pre-commercial equipment; the terminal from the FPGA development version to ASIC The pre-commercial terminal from the chip to the present has achieved high-quality, high-efficiency and low-cost to promote industrial maturity.
The next phase of testing will target multimode terminals
According to reports, the first phase of the test mainly verifies the scale of the same-frequency networking capability, verifying the multi-antenna method, etc., to achieve system and single-mode chip maturity. The second phase of the test mainly verifies the performance of R9 and promotes the development of multi-mode terminals. "The second phase of the test is expected to start at the end of October and early November." Wei Guiming said.
There are two conditions for entering the second stage of testing. First, in the first-phase single-mode test in 6 cities, two systems and two chips completed the test and met the requirements; second, two multi-mode terminals (TD-LTE / TD-SCDMA / GSM) using different chip solutions. Mtnet's Huairou and Shunyi outfield conducted test verification and optimization, completed the test and met the requirements.
TD-LTE multimode terminals are closer to commercial products. Wei Guiming said: "On the TD-LTE multi-mode terminal / chip solution, multi-mode terminals must support TD-LTE, TD-SCDMA, GSM tri-mode, and also support LTE FDD." In the standby or dual standby mode, a single chip or dual chips may be used. The multi-mode data card single-standby or dual-standby mode supports both TD-LTE / TD-SCDMA / GSM single-chip, only the dual-standby mode uses TD-LTE + TD-SCDMA / GSM dual-chip; multimode The dual-standby mobile phone uses the same chip as the multi-mode dual-standby data card; the multi-mode single-standby CSFB mobile phone uses a TD-LTE / TD-SCDMA / GSM single chip that supports CS Fallback.
In the research and development of TD-LTE multimode terminals / chips, dual-chip multimode solutions will be introduced more quickly. By using existing TD-LTE single-mode chips and TD-S / GSM commercial chips to form a dual-chip multi-mode terminal, there are currently four plans to provide multi-mode data cards or dual standby mobile phones in the fourth quarter of this year. The single-chip multi-mode solution is the future development direction. They all use a 40-nanometer process and support at least TD-LTE / TD-S / GSM three-mode. Seven chip companies plan to provide this chip next year, and others Chip companies plan to provide it by the end of 2012 or 2013.
TD-LTE international spectrum is critical
Promoting the internationalization of TD-LTE is one of the purposes of six-city network testing. "During the LTE phase, the TDD pattern has undergone great changes." Cao Shumin, Dean of the Telecommunications Research Institute, said, "With the increase in asymmetric frequency bands and single-band frequency bands, 66 operators in 22 countries around the world have TDD frequency bands. "
"As of now, 2 operators have officially launched TD-LTE commercial services, 10 operators have made clear TD-LTE commercial plans, 33 TD-LTE test networks have been reached, and the number of TD-LTE base stations is expected to reach 6500 by the end of 2011 Huang Yuhong said, “Japan ’s Softbank, Indian Batty, American Clearwire, European Hi3G, Middle Eastern Mobily, and Brazil ’s SkyTV became the first TD-LTE operators. Other potential regions include Southeast Asia, South America, Canada, Middle East, Africa, and Russia Etc. Among them, the population of Southeast Asia exceeds 600 million, and the potential for wireless broadband is huge. "
From the perspective of market strategy, operators represented by Softbank and Clearwire of Japan pay attention to feature terminals such as iPhones supporting TD-LTE. Therefore, it is hoped that the industry will reach an agreement on frequency bands and terminal strategies as soon as possible. Emerging markets represented by India, Southeast Asia, South America, the Middle East, and Russia hope to deploy TD-LTE before the development of local LTE FDD to seize the opportunity. Their product needs are mainly data cards and home gateways, and they look forward to China's guidance and help. The WiMAX camp represented by developed and developing countries depends on when TD-LTE terminal costs drop to WiMAX levels.
Strive for more frequency resources and industrial resources, maintain synchronized development with LTE FDD, and build an end-to-end international industrial chain. Among international operators, expanding the market is the basic idea of ​​TD-LTE internationalization. "In promoting the international development of TD-LTE, we realize that the most important thing is to find the frequency." Huang Yuhong said, "When the United States pushed the WiMAX technology, it found the 2.6GHZ frequency and lobbied to various countries."
The timing of frequency band planning in China is very important. Wu Hequan, an academician of the Chinese Academy of Engineering, believes that the frequency of mobile communication is obviously insufficient, especially TDD, and 2.6GHZ is currently an important global TD-LTE application frequency band. "2.3GHZ is a globally planned TDD frequency band. It is recommended that China coordinate the mid-to-long-term use of this frequency as early as possible." Wu Hequan said, "At present, FDD has about 548MHZ available frequency bands, and TDD has about 150MHZ." For low-frequency bands that TDD needs very much Resources, Wu Hequan said: "700MHZ is the golden frequency band of LTE. At present, China is used for broadcast TV, and hopes that in the process of TV from analog to digital, it is possible to release spectrum resources.
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