R & D is not only the key to promoting the improvement of enterprise products and technological progress, but also can bring many patents to enterprises. In the information and communication industry, the patents of top companies are often converted into industry standards, thus becoming the core competitiveness of enterprises. And those patents that are "buried" in the standard, when the corresponding technology is commercialized on a large scale, often become a weapon for enterprises to participate in competition or a fence to achieve self-protection. A few days ago, the reporter went to Huawei North Research Institute to understand Huawei's contribution to the TD-LTE standard, but unexpectedly discovered Huawei's rigorous layout of wireless technology standards and patent architecture.
Leap into the leading enterprise of LTE standard
The reason why Huawei can play a leading role in the standardization organization is inseparable from the large investment.
"Huawei's leadership in the LTE standard has improved rapidly. From 2008 to the first half of 2013, Huawei has entered 7402 LTE proposals into 3GPP RAN1-RAN5 and passed 2196." Director of the Huawei Wireless Network Standards and Patent Department Sun Lixin said, "According to the latest standard impact assessment report released by the consulting company ABI in April 2013, Huawei is already one of the leaders in the standardization work in the LTE field." ABI's inspection of LTE standard leadership is divided into 6 The latitudes are the leadership position, the rapporteur position, the number of proposals, the number of proposals passed, the discussion manuscript, and the revision of mature standards in the standardization organization.
"In fact, the reason why Huawei can play a leading role in the standardization organization is inseparable from our investment. We have a continuous and stable investment in the entire wireless communication standard. We start from the project in the world, There are more than 200 research and standard engineers working in the field of LTE / LTE-Advanced. "Sun Lixin said.
Huawei has been actively involved in TD-LTE standardization since 2004, and has participated in the standardization of all versions of LTE since the first version of LTE, Rel-8 (Rel-8, Rel-9, Rel-10, Rel-11, Rel-12). At present, Huawei has 1 chairman and 2 vice-chairmen in 5 groups of 3GPP RAN; starting from Rel-8, it has undertaken more than 50 rapporteurs in LTE. On various topics in the LTE field, Huawei is a major contributor and a standard-setting facilitator, and has a large number of technical proposal inputs; the first physical layer topic reporter in Chinese companies (Rel-10 UL MIMO) The first chairman, the company that contributed the most to the proposal; there are currently 18 LTE-related TS / TR reporters.
In terms of patent structure, Huawei has applied for more than 60,700 patents in China, the United States, Europe and other countries and regions, including nearly 15,300 patents in the wireless communications field. Huawei has 2204 sub-primary patents in the international standards of wireless communication; LTE / EPC has declared 871 basic patents on ETSI, accounting for 15% of the world's total, ranking first in the world; of which UMTS has already been listed on ETSI 778 declarations, accounting for 6% of the total declarations in the UMTS field; 145 GSM declarations have been declared in the GSM field, accounting for 3% of the total declarations in the GSM field. So far, Huawei has invested more than 300 standard research engineers in the field of wireless communications.
Sun Lixin said: "In terms of patents, in the past few years, we first realized self-insurance, and then realized zero payment for cross-licensing of external patents. Two to three years after the launch of the LTE market, we will have a certain income in patents."
Core contribution to TD-LTE
Huawei is the only enterprise that conducts self-assessment on both TDD and FDD systems.
The TD-LTE standard has been developed from Rel-8, Rel-9, Rel-10, Rel-11 and other four versions from the first version to the present. The Rel-12 version is still under discussion and formulation.
"From the beginning of the standardization of LTE technology, Huawei has adopted the keynote of TDD and FDD to promote the integration of the two systems and the simultaneous development of the two systems to promote the synchronization of the TDD system with the FDD system in terms of basic functions, important features, performance, and testing Development, to ensure that the TDD system can be fully developed, laid a solid foundation for the establishment of a healthy industrial chain from the beginning, and the strategy has always been implemented in the entire standardization process of LTE / LTE-A. "Sun Lixin said.
From the beginning of LTE standardization work, Huawei, together with China Telecom and China Mobile, have promoted the integration of TDD and FDD frame structures, laying a solid foundation for the future maturity of TD-LTE and the growth of the industry. Due to the characteristics of TDD technology, the HARQ design of TD-LTE is more complicated than that of FDD, and in the TD-LTE standard, the design of HARQ timing is one of the most critical core links. In Rel-8, Huawei, China Mobile, Datang and other companies fully invested in leading the discussion of TDD HARQ design, ensuring the steady progress of the TD-LTE standard.
Dual-stream beamforming is an important feature of the Rel-9 physical layer protocol, which can effectively improve the downlink data throughput of TD-LTE. This issue is led by China Mobile as a reporter. Huawei has invested a lot of energy to help it successfully complete. There are a lot of outputs on pilot pattern design, CQI feedback, hardware calibration, control signaling design, multi-user MIMO, and more than 30 proposals have been output.
From 2011 to 2012, because TD-LTE lags behind FDD in the development of test standards, Huawei has dedicated people to promote this work. After six months of high-intensity work, it has ensured the completion of TD-LTE test cases and ensured FDD and Synchronization of TDD standard processes. Huawei has also contributed to the promotion of China ’s Zuchong algorithm to the LTE standard, and through effective standard scheme design, this algorithm can be applied to terminals of earlier protocol versions, accelerating the deployment rhythm of Zuchong ’s algorithm in the network.
In the development of Rel-12 and subsequent standards, Huawei first proposed the LTE HI technology optimized for small cells in the industry, and promoted the standardization of 3GPP with the support of the competent authorities such as the Telecom Research Institute, and obtained the corresponding issue report. Huawei once again played a leading role in the technical direction of Rel-12.
"It is worth mentioning that in 2008, ITU launched the 4G technology call for IMT-Advanced, and 3GPP also started the ITU self-assessment work. Huawei provided complete and comprehensive TDD and FDD self-assessment results within 3GPP, and The only company that includes both TDD and FDD formats and meets all ITU needs. "Sun Lixin said," In this assessment, we guarantee that TDD can expand coverage. "
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