10-year review of Access Network Technology Development

The development of access network technology is still very rapid. From wired to wireless, people have higher and higher requirements on the network environment, and the market demand is also increasing. I believe that the future development will be faster, new technologies will also emerge constantly. Before the advent of the lamp, Aladdin's many dreams were still like the air. However, as the lamp ignited, Aladdin changed his fate. Like Aladdin's experience, the communication access network technology has completely changed people's life style after ten years of change, and the power of communication technology seems to have never been so powerful. Return to the starting point of ten years and review the magical time. Aladdin's lamp has been ignited, giants have been awakened, and the storm of communication technology is coming.

Meeting 1995

In the history of contemporary communication technology development, the 1995 s of the last century should be a very special year. After a period of commercial development in the communications industry, many factors have taken place during the annual social meeting and have produced a series of access network technology elements that affect the future development path of the communications industry, the contemporary communication industry has ushered in its own golden age.

Kevin Jacob (founder of Qualcomm, the father of CDMA in the industry) experienced a roller coaster of vertigo in 1995. In early 1995, Qualcomm, which was committed to solving the problem of commercial CDMA deployment, encountered a great deal of trouble-as more and more testing systems are deployed globally, the performance of the CDMA testing network has even left Qualcomm engineers confused. However, the rapid completion of "crisis research" in a short time has brought Qualcomm to the end. In July 1995, Qualcomm's watershed incident happened-sprintpolicyventures (STV) decided to use CDMA as its preferred technology. Since then, other companies that are hesitant about technology have successively decided to adopt CDMA. So far, CDMA, which will become the basic technology of 3G in the future, will start to "stream ".

In addition to the CDMA technology as a bright spot, Beijing Xinwei company proposed the TD-SCDMA communication technology system in 1995, which became the technology of 3G standard TD-SCDMA in the future ". The TETRA digital cluster standard was officially determined by ETSI (European Telecommunications Standards Association) in this year and began to be widely used by many European manufacturers.

In 1995, there were still many events in the wireless field that need to be noted: Nortel began to intervene in the wireless market this year. Previously, Nokia, which was still unknown, has been moving towards a successful multinational high-tech company since 1995. At the end of this year, Huawei began to expand into the GSM field with full horsepower. The selection of China's second generation mobile communication has also begun. All kinds of indications indicate that the development of wireless communication access network technology is imminent. The Internet also ushered in its own avalanche point in 1995. In the past year, HTTP (Web) groups began to exceed FTP traffic and became the most popular Internet protocol. The new Internet application model is making it a popular source of information. With the advent of the Internet business avalanche, some new access network technologies have been directly triggered and started to sprout. The most important one is the VoIP that we are now talking about.

The Israeli VocalTec company launched InternetPhone in 1995. This is not only the abuse of VoIP phones, but also the prelude to the commercialization of Telecom IP. Since then, people will not only be able to enjoy cheaper or even completely free calls and multimedia value-added services, but the content and appearance of the services in the telecom industry have also changed dramatically, the Practice and exclusiveness of the telecommunications industry with the PSTN circuit switching network as the transmission media have been gradually broken.

Human consciousness of worry seems to be inherent. At the beginning of the Internet boom, IPv4 has inherent defects in Address Resources and other aspects, some scientific workers with "Cleanliness" are no longer tolerable. To completely solve IPv4 problems, IETF (Internet Engineering Task Force) began to research and develop the next-generation IP protocol (IPv6) in 1995.

However, the development of the Internet is far from enough. The rapid development of services also requires the support of network transmission bandwidth. As a result, the well-known WDM (Wavelength Division Multiplexing) technology in Optical Communication started to enter a vigorous development period in 1995. However, EDFA (Er-doped fiber amplifier), which was subsequently pushed to commercial use, is also working with WDM to bring the broadband transmission market into full swing. From the perspective of technology history, in the eyes of some experts, EDFA can be fully compared with the role of transistors in electronic technology.

After the emergence of a revolutionary technology, a series of chain reactions will be triggered in related technical fields. This rolling technology group evolution shows an unstoppable trend, all of this was verified in 1995.

Progressive revolution

For the development of a technology, it will often revise or even subvert its initial "capability preset" in the subsequent industrial practices, and the development of technology will gradually mature between such sudden changes, the evolution of communication technology over the past decade has also proved this point.

From the very beginning, 3G was an ever-evolving technology with an unprecedented number of "revisions. At the beginning of the research and formulation of the 3G standard, IP and broadband technologies were not yet popularized, while the ISDN technology was being hyped up, therefore, 3G technology is basically the application of ISDN technology in mobile communication, which is the "original 3G" with a bandwidth of kbps ". Previously, 3G Based on ISDN technology had lagged behind in the face of IP and wireless broadband technology, and was inevitably challenged by some new wireless broadband technologies such as WiMAX, in this way, the version upgrade of 3G was launched quickly. The emergence of HSDPA (high-speed downlink grouping access network technology) and HSUPA (High-Speed Uplink grouping access) Technology, 3G has basically completed its own short board.