World Expo Park TD-LTE network built and LTE FDD shared platform
World Expo Park TD-LTE network built and LTE FDD shared platform
If 2009 is China's "3G first year", 2010 can be called the "TD-LTE year" of China's communications industry. The world's first TD-LTE scale demonstration network will make a wonderful appearance at the Shanghai World Expo.
Every 30 minutes, the construction site of the Danish National Pavilion at the Shanghai World Expo was filmed and passed back to Denmark for documentary production. It was not the staff in the Expo, but the 12-meter-high outside the Danish Pavilion. The camera system on the antenna tower and the TD-SCDMA network in the Expo Park.
At present, the world's first TD-LTE scale demonstration network in Shanghai World Expo Park is under intense construction, and builders hope it will become a highlight of this World Expo: The "point-and-shoot" adopted by media reporters at the Beijing Olympics will be in The World Expo will be upgraded to "shot and shoot", and the upload will no longer be limited to high-definition photos, but also support high-definition video content; security personnel will realize high-definition mobile video surveillance throughout the park; buses in the park and the Huangpu River Cruise ships watch high-definition live broadcasts in the park through large screens ... The featured services based on TD-LTE also include high-definition video conferencing, high-definition live navigation, and wireless high-speed Internet access. The unprecedented high-speed data service experience will be realized by the TD-LTE network in the Shanghai World Expo Park.
The reporter recently learned that China Mobile has basically completed the TD-LTE indoor coverage of the Expo Park and the installation and power-up of some outdoor base stations. Some outdoor base station construction is coordinating site resources, related business commissioning and network optimization work with venues in other countries. Expanding.
Actual measurement 70Mbps
"The first TD-LTE system of the World Expo venue has been officially opened in the permanent building of the Shanghai World Expo, the World Expo Center in the 'One Axis and Four Pavilions'. The measured data transmission rate on the site reached 70Mbps, which is more than 20 times the existing 3G technology." The head of China Mobile Shanghai told reporters.
Through the planned 17 outdoor sites and 8 indoor sites, China Mobile Shanghai has achieved a TD-LTE network that fully covers a 5.28 square kilometer Expo Park, including the Huangpu River crossing the park and the China Pavilion, Theme Pavilion, Performing Arts Center, 8 venues including the Expo Center.
The reporter learned that the outdoor part of the TD-LTE network was built by Huawei, and the indoor coverage was built by Motorola and Shanghai Bell respectively. Nokia Siemens Networks will demonstrate TD-LTE at the Finland Pavilion. Datang Mobile has undertaken the TD-LTE of the Information and Communication Pavilion For network construction and security, ZTE Corporation undertakes to build the TD-LTE indoor coverage of the World Expo News Center. The American Pavilion also expressed strong interest in the indoor coverage of TD-LTE. During the World Expo, Shanghai Mobile will also launch commercial TD-LTE data card terminals for user experience.
TD-LTE will enter the complete set test
At the same time, the reporter learned that individual domestic manufacturers have completed the basic set test of TD-LTE field led by the Ministry of Industry and Information Technology. This stage mainly evaluates the high-bandwidth wireless network capacity and many key TD-LTE functions. TD-LTE field test is divided into two places: Huairou and Shunyi. Huawei, ZTE, Datang and Putian tested in Huairou to achieve full coverage of the main urban area of ​​Huairou. The site selection is based on the original 2G and 3G sites. For indoor testing, Huairou has reserved a test range for it. Foreign manufacturers including Motorola, Nokia Siemens, Alcatel-Lucent and Ericsson are testing in Shunyi.
At this stage, the basic scale of TD-LTE field test is 5 base stations and 15 sectors for each equipment vendor. The test content includes throughput, delay, coverage, mobility, multi-user scheduling, user experience, etc. The test items are mainly divided into There are nearly one hundred projects in three categories: functional testing, RF testing and performance testing. Currently, all manufacturers have basically completed functional testing and RF testing. Only a few domestic manufacturers have completed comprehensive performance testing.
The test results show that the functions of the TD-LTE products participating in the test are basically similar. At present, the main performance of each equipment manufacturer's TD-LTE is network performance, including the ability to control the network such as scheduling and algorithms, and the control of delay. Zhou Jianguo, deputy chief engineer of the Wireless MarkeTIng Department of Huawei China, told reporters that Huawei achieved 12UE concurrency in the Huairou field, that is, 12 end users simultaneously access and realize all high-speed data services, and at the same time, by simulating different user usage scenarios in different environments Reasonable scheduling of system resources achieves reasonable allocation of cell resources, ensuring the QOE experience for all users.
In the follow-up, TD-LTE testing will enter the complete set testing phase of the system, which is an extended test for basic set testing. The reporter was informed that the Telecommunications Research Institute of the Ministry of Industry and Information Technology is currently leading the writing of a complete set of test specifications, which is planned to be completed between April and June. Huang Xiaoqing, president of the China Mobile Research Institute, previously stated that China Mobile ’s goal is to begin nationwide scale trials of multiple cities by the end of this year. The number of base stations in each city will reach more than 100. If the trials are successful, you can Some key networks are upgraded.
WiMAX camp or reversal TD-LTE
TD-LTE is being favored by more and more operators, and it does not exclude commercial users who originally supported WiMAX. Feng Ye, Vice President of Shanghai Bell, said: "Alcatel-Lucent is working hard to promote its leading WiMAX customers to TD-LTE, and has begun TD-LTE trials with many operators around the world in 2010, including first-class such as Orange in France. Operator. "Zhuang Jing, president of Motorola (China) Technology Co., Ltd. and president of Motorola China Research Institute, said that the TD-LTE equipment tested by Motorola and overseas operators is its third-generation OFDM product, including support for TD-LTE, BBU for LTE FDD and WiMAX.
At present, China Mobile is promoting the establishment of a joint TD-LTE internationalization industry joint project team with various manufacturers. It will promote the TD-LTE internationalization process through exhibitions, international operator cooperation, and global roadshows. In addition, overseas operators such as China Mobile and Vodafone and organizations such as NGMN and LSTI have been conducting TD-LTE testing and verification work. Jiang Su, general manager of ZTE's TD-LTE products, said that he has recently completed LSTI related tests, and its system functions, performance, and stability are in the industry's leading position. The follow-up test will be closer to the real network according to the needs of the operator, focusing on TD-LTE co-frequency networking, edge cell scheduling, spectrum allocation, power control, cross-cell interference coordination, etc., mainly to solve the problem of inter-cell interference in the same frequency networking . Zhou Jianguo said that Huawei and China Mobile completed the LSTIFCTM12a phase test in Huayang, Chengdu in early January this year. This is the industry's first large-scale field test. The test results were submitted to LSTI earlier.
Emphasize the common platform with LTEFDD integration
The integrated and balanced development of TD-LTE and LTE FDD has always been a hotspot in the industry. The reporter was informed that the software versions of TD-LTE and LTEFDD of some domestic manufacturers are expected to achieve basic synchronization this year. At present, all equipment manufacturers claim that they support the design of the common platform products of the two, such as Huawei SingleRAN solution & fourth-generation unified base station platform, ZTE new generation SDR base station platform, and Ericsson common platform LTE products. In February of this year, Huawei was the first in the world to demonstrate multi-party HD video interworking services based on FDD / TDD LTE wireless access, including a total of four parties including LTE test networks in Barcelona, ​​Germany and Austria.
Experts pointed out that, similar to the early stage of TD development, the bottleneck of the current TD-LTE industry lies in the lagging development of terminals and test instruments, which makes it difficult to evaluate indicators during system testing.
In addition, how to solve inter-cell interference in the same-frequency networking is a hotspot of TD-LTE research. Yang Yao, TD Product Manager of ZTE Corporation pointed out that CIC (InterCell Interference Cacellation) technology is one of the important technical solutions. 
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