The formation of interoperability standards for GPON and EPON has created the same conditions for development. With the continuous development of GPON industry, PON technology duel has just begun. Recently, China's first GPON equipment specifications and GPON equipment test specifications, by the Ministry of Industry and Information Technology Institute of Telecommunications Institute led by the Institute of Communications completed.
The GPON interworking test jointly conducted by the Institute of Communications Standards and China Unicom has resulted in the first interoperability between OLT (Optical Line Unit) and ONU (Optical Network Unit) of the two key GPON devices in the world after four years of two years. The industry's first GPON interoperability test instruments. After testing and verification, GPON equipment has been able to achieve data services, VoIP services, multicast services and multi-service integrated bearer at the GPON physical layer, TC layer, OAM and OMCI layer interoperability.
It is reported that, according to the test results formed GPON equipment specifications have been submitted to the relevant departments of Industry and Information Technology for approval, and will be released soon. Full participation in the GPON interoperability testing communication standard Ao Li, deputy director of the Institute told reporters that the completion of the test and the introduction of technical specifications for the GPON industry scale to provide a standard support, which will greatly promote the GPON deployment process.
Exchange threshold has been crossed
The GPON and China Unicom's GPON Interoperability Test started in August 2007 and has undergone four phases of testing in two years. The first three phases are based primarily on the physical layer and TC layer, OMCI layer and business-related layer of the basic test. The fourth phase of the test, which started in March this year, is based on the first three basic tests and tests the GPON standard.
The fourth phase of testing Ericsson, Shanghai Bell, Motorola, Huawei, Fiberhome, ZTE and UT Starcom 7 equipment manufacturers to participate. "Test results show that, GPON equipment features perfect performance in line with expectations, the mainstream manufacturers of OLT and ONU interoperability problems." Ao Li said.
For a long time, GPON equipment interoperability between different vendors has been plagued GPON size an important reason for the development. In order to solve the problem of GPON interoperability, FSAN has been working on the interoperability of GPON and international interoperability testing since 2006.
Launched by FSAN from June 22 to June 26, 2009, the eighth GPON Interoperability Test hosted by France Telecom and ETSI was completed. According to the summary data provided by the ETSI website, nearly 90% of the interoperability of each individual test item is achieved. The overall interoperability is as high as 94.4%. Based on the summary data provided by the ETSI website, this test takes the first version of OMCI implementation guidance compiled by the OISG working group as the implementation benchmark. Interworking tests demonstrate better interoperability than ever before. Just at this time, the domestic GPON interoperability testing has also made important achievements, we can say that this time the international and domestic GPON interoperability testing progress remained the same.
How far is it from maturity?
In the two years of the GPON interworking test in China, GPON has been deployed in China at a very limited number of levels due to the lack of industry standards. And this time is the rapid development of EPON in China, China Telecom and China Unicom's PON equipment purchases are all based on EPON, EPON subscribers already exceeded 10 million lines. Only from the domestic market, the current GPON lags far behind the EPON, but why standard organizations, operators and equipment vendors are still insisting GPON development?
Technically, EPON is based on Ethernet and IP protocols and GPON supports ATM, TDM, SONET / SDH, and Ethernet protocols. The downlink rate and split ratio are also different. The industry generally believes GPON controllers can support a wide range of services while boosting bandwidth due to higher levels of integration than EPON controllers. For operators, in the case of EPON and GPON function similar, what kind of technology construction network is valued more convenient and cheaper. Shen Chengbin of China Telecom Shanghai Research Institute said that when using scale construction, operators are choosing the technology based on the optimal construction investment. Before the development of EPON, EPON was a matter of course. GPON to get the scale of deployment in the country, need a better investment and construction ratio.
From the market development point of view, EPON can quickly develop the main time node is the EPON industry in 2007 the promulgation of standards. EPON industry standards by China Telecom in a number of pilot and interoperability testing on the basis of the introduction of industry standards for operators to collect with a basic basis and reference. Later, China Telecom's EPON industry standards, but also become the other operators EPON acquisition and construction of the main reference. "Now GPON equipment technical standards, GPON industry has set the standard for the use of the basis to provide a GPON industry standard to speed up the molding, GPON in the country a large number of commercial is already a rule to follow." Ao Li said.
However, GPON, just to achieve industry standards is not enough, to establish a sound system of operation and maintenance and IT support system is a symbol of the maturity of GPON, the current domestic carriers are doing this work. Shen Chengbin said that GPON support and operation and maintenance system development is still very important, GPON network configuration and IT system development so far still in progress, EPON's success for the GPON pilot done a good bedding.
GPON industry at the same time as the basic part of the system chip came good news in the operator to promote GPON development. Currently in the domestic GPON chip suppliers have expanded to Broadlight, PMC-Sierra, Broadcom, Marvel, Cortina, Hisilicon, Infineon, Ikanos and many other recent chip giant Broadcom announced this year will launch GPON chip to the Chinese market to support the development of GPON . The EPON mainstream suppliers only three, namely PMC-Sierra, Teknovus and Cortina.
Within the region should be unified technology
Among the seven vendors participating in this test, there are not only GPON vendors, but also the main supporters of EPON such as ZTE, Fiberhome and UT. The scope of the vendors involved in the test is very wide. EPON equipment providers to join, it means that the market began to guide GPON?
ZTE fixed network chief architect Ma Runbin told reporters, GPON test and pilot, did not affect the progress of EPON, ZTE EPON production and 10GEPON R & D is still in an orderly manner. Fiberhome also expressed a similar view. It seems the future of both EPON and GPON market has taken shape.
Wei Le, director of China Telecom Science and Technology Commission said that in order to make better use of EPON, GPON, the two need to make preparations for joint use of both, proceed with the development of compatible support systems for both. Speaking from the technology, to achieve compatible EPON, GPON support system is feasible, Shen Cheng Bin said. There are currently no commercial trials of whether to deploy both systems in the same area for actual deployment. However, some experts suggest that in a certain area, or choose a unified technology as well. Ao Li said that from the perspective of reducing procurement and management and maintenance costs, it is recommended that a region choose only one system. Shen Chengbin also said that in the long run, using a technology to complete the access network more in line with the operation and maintenance and cost requirements.