Zhang Dechao of China Mobile Said That the Innovative Architecture of Volt Helps to Build an Intelli

In recent years, with the vigorous development of online on demand, online education, IPTV, VR and various interactive game services in China, people's demand for bandwidth continues to grow, and wired broadband has entered the Gigabit era. Therefore, 10g   PON and Gigabit intelligent gateway have been commercialized on a large scale, and the resulting network upgrading pressure is also on the table of major domestic operators.

During the 2019 China International Optoelectronics Expo, Zhang Dechao, manager of the transmission and access network research office of the Institute of network and it technology of China Mobile Research Institute, said in an interview with c114 that the innovative architecture of volt will help to build an intelligent and open optical access network. "The core value of phase 1 is to solve the problem of network interoperability."

Zhang Dechao, manager of transmission and access network research office, Institute of network and it technology, China Mobile Research Institute

Interworking difficulties perplexing operators

According to the latest statistics, as of July 19, China Mobile's fixed line broadband users had reached 178 million, 100 megabyte users have been basically popularized, ultra 100 megabyte Ge users have gradually become the mainstream, and the broadband network has entered a new era of Gigabit. However, the traditional wired broadband network has many limitations, such as poor interworking, high upgrade cost and inflexible support for new services, which affect the network upgrade and slow down the online speed of new services.

Interoperability is a world-class problem for three reasons. Zhang Dechao explained: "Firstly, the interworking test needs to be conducted in pairs, with heavy workload and long test cycle. It takes 17 working days for a single gateway. Secondly, due to the black box characteristics, when the network fails, the operator can only deal with the problems from the interface characteristics. It is difficult to solve the specific implementation problems in the module. The technical clarification caused by black box interworking can be up to 10 times in a year. Then, the current network If the versions are not unified, there will also be interoperability problems. "

In addition, in order to ensure the stability and reliability of the network, operators are often very cautious about OLT upgrading, because even if a small function module is added, the OLT software must be upgraded as a whole. In order to avoid affecting users, the deployment of new functions is extremely cautious.

The latest development of VLT architecture

Back at the end of December 18, China Mobile first released the new technology architecture of volt, Cami interface (universal access network management control interface) and prototype system, aiming to build the technology architecture of volt for unified and centralized management and control, and is committed to solving the constraints of Gigabit broadband development such as Gigabit home gateway interworking.

At the meeting, China Mobile signed an action initiative with 13 research institutions, equipment manufacturers and chip manufacturers, such as China Academy of communications and communications, Huawei, ZTE, Fiberhome and Broadcom, calling for the joint establishment of volt test bed and interworking test environment; accelerate the maturity of Cami software module and jointly realize 10g   GPON is a more efficient interworking commercial.

OLT is an important network element of the optical access network, which is connected with the user's intelligent gateway to provide integrated service access services. The technical architecture of volt proposed by China Mobile separates the management and control of 10G GPON optical fiber access from the forwarding equipment, controls based on the nfv cloud platform, constructs an open system with flexible functions and dynamic network upgrading, and efficiently uses the unified and standardized Cami interface Realize the interworking between volt and Gigabit home gateway.

"Setting up a joint R & D project team for Cami module is an innovation in organizational form and fruitful," Zhang Dechao explained, "China Mobile first worked with its partners to determine the modular architecture for the internal innovation of Cami modules, and then determined the functional boundaries of Cami internal modules. Following the unified specifications of China Mobile, when the joint project team carries out modular R & D, it does not need to consider the interworking of OLT itself too much, as long as the gateway takes into account the interworking between Cami modules, which greatly simplifies the interworking process Amount and difficulty. "

It is understood that the Cami north interface "shields" the diversity of EMS from many manufacturers, the Cami module "shields" OMCI is misunderstood, and the Cami South interface "shields" Olt-up device differences. At present, cloud Cami has been jointly developed by multiple manufacturers and launched a test version, which has realized the docking with the manufacturer's management platform and OLT and ONU hardware. The overall design and R & D of gateway Cami have been completed, the systematic docking test with Huawei, ZTE, Fiberhome and Nokia traditional OLT devices has been completed, and the unified cloud Cami docking demonstration has been completed.

Gather the strength of the people and prosper the people

With the continuous promotion of China's "broadband China" strategy and the "double g and double mention" According to the clear requirements of, cloud access network and open interworking are the inevitable trend of network development. The innovative technical architecture of volt not only adapts to the evolution trend of future networks, but also effectively solves the problems of network interworking and openness, and provides flexible new functions and new business support capabilities. It is a key technical measure to prosper industrial development and realize "speed-up and cost reduction" in the Gigabit era.

In view of the above situation, representatives from Huawei, ZTE, Shanghai Nokia bell, beacon, Broadcom and other manufacturers expressed their support at the recent forum on "cloud evolution of volt, leading the Gigabit new era".

Cami live demonstration

At present, China Mobile is stepping up the joint commissioning of Cami, in order to further deepen the Cami system test, continuously improve the system performance, stability and scalability, and improve the product maturity. At the same time, China Mobile will also promote the reverse integration of Cami, promote the reverse integration of Cami plug-ins on both sides of the end and cloud with the manufacturer's system, improve the deployment mode of volt, and further promote the national architecture of volt International and industry standardization.

Zhang Dechao said, "China Mobile will communicate and negotiate with its partners and apply the achievements we have made to 10g PON OLT of various manufacturers as soon as possible. According to the overall arrangement of the company, it is planned to start the pilot work of the current network before the end of 19 years to verify and evaluate the performance and reliability of Cami's current network deployment and operation."

Source: c114

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