- In 2004, Datang Mobile began its research into TD-LTE technology and became directly involved in 3GPP LTE standardization.
- In June 2005, Datang Mobile submitted its LTE scheme based on OFDM and multi-carrier TD-SCDMA to 3GPP (the 3rd Generation Partnership Project).
- In October 2005, 3GPP accepted the OFDM scheme proposed by Datang Mobile, which was compatible with the TD-SCDMA structure, and named it "Frame Structure Type2", laying a solid foundation for the subsequent evolution of TD-SCDMA.
- In May 2007, the beamforming (BF) technology proposed by Datang Mobile was officially adopted by 3GPP as a TD-LTE inclusion, and subsequent updates were also adopted for LTE FDD.
- In November 2007, the 3GPP Working Group adopted a TD-LTE convergence proposal which was spearheaded by Datang Mobile and co-signed by 27 vendors. The proposal was officially written into 3GPP standards, and adopted at the RAN conference at the end of 2007.
- In December 2007, Datang Mobile developed the world's first prototype, made the first air interface call between eNB and NBT, and verified the theoretical peak rate of TD-LTE.
- In 2008, TD-LTE was further ratified at conferences in Spain, Italy, China (Shenzhen) and the U. S. The intelligent antenna technical proposal drafted largely by Datang Mobile was adopted in its entirety into the TD-LTE standard.
- In September 2008, Datang Mobile completed a TD-SCDMA/TD-LTE common platform, and in December of that year launched the industry's first pilot of TD-LTE.
- In March 2009, by virtue of the concerted efforts of China Mobile and Datang Mobile, the Dual-Stream BF project - enhanced downlink transmission for LTE, was successfully tabled at the 3GPP RAN #43 conference.
- In 2009, Datang Mobile launched TD-LTE end-to-end solutions based on IMS products, laying a solid foundation for operators to complete multi-network convergence for full-service operation.
- In October 2010, TD-LTE-Advanced was selected as an IMT-Advanced technology.
Datang Mobile is committed to ongoing TDD research. After years of effort, it now lays rightful claim to significant technological advantages in TDD. Datang Mobile owns the core patents for TD-SCDMA and TD-LTE technologies, and leads the development of TD-SCDMA and TD-LTE technologies and standards.
The concept of LTE was first raised at the 3GPP Long Term Evolution Workshop held in Toronto Canada in November 2004. At the workshop, the requirements for 3GPP UTRA future evolution, including air interfaces and network architectures, were first mooted. At the 3GPP RAN#26 conference held in Athens Greece in December 2004, 3GPP UTRA Long Term Evolution was officially accepted for evaluation in the field of new air interfaces and network architectures. The LTE concept proposed by 3GPP gave rise to the most important research program ever undertaken by 3GPP, attracting a large and unprecedented number of partners. Datang Mobile played an important role from its inception. During more than five years of standardization, Datang Mobile played a critical role in proposing and improving TD-LTE and TD-LTE-Advanced technologies.
- Dual-stream BF poised for rapid deployment
- Multi-antenna technologies represented by smart antenna are long-standing advantages of Datang Mobile. Over the past 10 years, from the standardization to commercialization of technologies from TD-SCDMA to TD-LTE, Datang Mobile has accumulated a comprehensive and unmatched understanding of smart antenna technologies. In May 2007, the BF technology proposed by Datang Mobile was officially adopted by 3GPP for inclusion in TD-LTE (R8).
- Virtually concurrently, Datang Mobile commenced study into Dual-Stream BF technology for 4G standards to enable smooth and uninterrupted evolution of TD-LTE Single-Stream BF in subsequent LTE versions and LTE-Advanced. The technology innovatively combines spatial multiplexing and BF to increase system throughput and meet the requirements of operators.
- In 2007 and 2008, Datang Mobile and China Mobile submitted their jointly developed Dual-Stream BF solutions to the IMT-A Group and standards sub-group, which were very well received and subsequently adopted. Before 3GPP initiated Dual-Stream BF, China Mobile and Datang Mobile had already begun, in June 2008, to insinuate the technology into LTE R9 and LTE-A. At the RAN＃43 conference held in March 2009, Datang Mobile worked with China Mobile to push for the adoption of Dual-Stream BF (R9) by 3GPP, and 3GPP RAN 1 also commenced moves towards standardization. In December 2009, 3GPP all but finished the Dual-Stream BF standardization project. In March 2010, 3GPP completely finished the Dual-Stream BF standardization project.
- 8-antenna Dual-Stream BF technology is an effective means of increasing throughput. According to the evaluation results submitted to ITU, sector and edge throughputs were increased by up to 80% and 130% respectively. In December 2009, Datang Mobile staged a TD-LTE technology release for industry experts to demonstrate the outstanding performance of Dual-Stream BF technology in increasing user throughput and coverage capacity. The innovative technology demonstrated at the release was recognized and commended by senior management and industry experts from the Ministry of Industry and Information Technology, China Mobile and various foreign operators.
- Progress of TD-LTE-Advanced
- In anticipation of IMT-Advanced standardization, at the beginning of 2007 Datang Mobile began to research technology and to facilitate standardization, focusing on LTE and ITU projects. As for its technology research, Datang Mobile incorporated TDD characteristics into its innovations, making a number of achievements and resulting in its 4G white paper. In addition, Datang Mobile actively participated in various 3GPP LTE projects, and as a result accumulated much technical competence. To facilitate standardization, Datang Mobile promoted TD-LTE milestones and the adoption of many technical standards into 3GPP specifications; During the different ITU IMT-Advanced stages, the requirement that ITU IMT-Advanced should accommodate TDD characteristics, smart antenna and other TD features were written into ITU documents. In addition, 3GPP and ITU cooperated closely so as to optimize interaction.
- At the ITU-R WP5D meeting in October 2009, China submitted its TD-LTE-Advanced technical proposal, which was accepted by ITU for future evaluation. China was thus a major contributor to the development of next-generation mobile communication IMT Advanced (4G) standard. As the major proposer, promoter and contributor to the development and implementation of the TD-LTE Advanced standard, Datang Mobile has, due to its persistent efforts from the beginning, made great achievements which will benefit both the company itself and the industry in general. TD-LTE-Advanced grew out of TD-LTE. Datang Mobile was the primary developer of TD-LTE technology and standards. Its raft of research projects in TD-LTE enhancement technology laid a solid foundation for its continuous domination in the standardization of TD-LTE-Advanced technology and standards.