Integrated Service Optical Network operation mode

With the rapid growth of data business, the opening and formation of market competition, and the emergence of various new technologies, the network structure is also evolving. The data business includes the high-speed Internet of individuals and enterprises and the interconnection between enterprises, which forms the new broadband value chain in the network. In the broadband value chain, a complete solution such as user access, service delivery and content delivery by monopolistic telecom operators is no longer in line with market cultivation, competition and development requirements. Only in each part of the value chain there are more providers, can promote the development of telecommunications, such as local operators will continue to emerge, including ISPs, providing user access, certification and billing, IDC, ICP, ASP and other services to complete host hosting, content provision, application delivery. These local operators do not have their own backbone networks, so there is a strong demand for bandwidth. On the other hand, the group of users, especially the financial sector, large enterprises, government agencies, institutions, and other branches have their own local area network, and how reliable and secure interconnection between the LAN, forming the national and even the global group user intranet, to achieve office networking, improve efficiency, This also requires network operators to provide good quality and price solutions.

In the connection of the special line interconnection, at present, the domestic 2M below the use of Ddn and FR, with the increase in optical fiber transmission capacity, user use per bit of bandwidth costs will drop, with the development of broadband and video services, user demand for bandwidth is very strong, 2M below the low rate of business will become less Ddn and FR no longer have the advantage of achieving faster access, flexible scheduling, and long-distance transmission over 2M to GE's high-speed business. Enterprise interconnection can also be achieved through VPN using ATM/IP devices, improve bandwidth utilization, but according to the survey, in the data business in the proportion of VPN is relatively small, the United States VPN business revenue accounted for about 3% of the entire data business, in China VPN almost no business revenue, the main reason is technology, QoS protection, Security and reliability are not fully guaranteed.

Traditional optical network is mainly adapted to the transmission of TDM services, in the transmission of variable bandwidth packet service is not enough, and the multiple service delivery platform (MSTP) is the next generation of SDH equipment, not only to complete the traditional TDM service transmission, but also access to ATM, ETN/IP business, It is the technical guarantee to realize the operation of integrated optical network to realize the two-layer bridging and switching function, and to complete the access and transmission of the data service. Through the next generation SDH equipment, the establishment of broadband dedicated line network, can provide 64k￣155m line business, including Ethernet, ATM services, can also provide wavelength rental. Rich business types, low bandwidth costs, to meet the needs of local operators and groups of users interconnection requirements.

The operational, manageable optical network of MSTP consists of two levels of service delivery and business management, such as in the metropolitan area, where the network structure provided by the business can be divided into backbone layer, edge aggregation layer and access layer. When networking, consider the use of distributed switching structure, business convergence and exchange at the edge of the convergence layer completed, through the unified planning, can not use expensive DXC (digital crossover device). The backbone layer completes the operation of large particles, such as VC-4, wavelength and so on.

In addition to the traditional language, video, data exchange equipment, MSTP, as an operating network, can also provide all kinds of bandwidth rental business to meet the local operators and group users of bandwidth requirements. The bandwidth rental service provided on the MSTP is not through the ATM, IP layer equipment processing, can be better to do bandwidth isolation, can provide high transmission efficiency, security, and Low-cost solutions. The services provided by Integrated Services Optical Network include:

Line business: 64K Voice/v.24/v.35 DDN Business, 1.5m/2m/34m/45m/140m PDH business, 155m/622m or higher sdh/pos business, 10m/100m/1000m ETN business.　　The basic feature is that the business is fully transparent, and bandwidth and security are fully guaranteed. Shared Services: 155m/622m ATM business convergence through the transmission, through vp-ring to achieve shared bandwidth size and business protection on the ring, 10m/100m/1000m ETN business convergence through transmission, through mapping the number of granular vc12/vc3/vc4 flexible bandwidth and VLAN to achieve flow control, and ip-ring to realize shared bandwidth and business protection on the ring. The basic feature is high bandwidth utilization.

Wavelength business: from 34m~10g to any rate and protocol business, including GE, FICON, ESCON, Fiber channel and other services. The basic characteristic is the transmission business capacity is big, the kind is many, the protocol is transparent.

In order to realize the operation of Optical network business, business management is equally important and a set of effective business process and management mode must be established. Optical Network Business Operation process generally includes the following parts: Business applications, business acceptance, business delivery, business optimization, billing and business management, and several other parts. First, the customer to the operator to put forward business applications, operators according to network resource management system to see whether there is a network in line with customer demand for bandwidth resources, to determine the user access through the purchase of equipment, increase the business of a single board or on the existing equipment directly provide business port to achieve.

MSTP can achieve End-to-end business automatic configuration, that is, by simply selecting the source, destination and business type, a few minutes after the establishment of path connectivity, to achieve rapid and flexible operation of the business. After the establishment of the business path, but also after testing, acceptance can be transferred to the customer use.

MSTP also inherited SDH mature, perfect business protection functions, including SNCP, MSP, DNI and so on. It also integrates vp-ring, ip-ring and other technologies to provide virtual shared optical path protection. A variety of protection coexistence, to ensure that the business in the network failure, can quickly recover, improve the availability of the circuit time, to ensure a comprehensive business SLA (service level negotiation).

Network management, in addition to the traditional SDH network performance, Alarm, configuration, security and other aspects of management, but also to achieve end-to-end link performance testing and monitoring, network resource optimization, billing data provision, CNM (Customer network Management), OVPN (Optical virtual private network) and other functions. Network resource optimization system can optimize business path and improve bandwidth utilization according to network traffic. Billing strategy provides a variety of ways, such as time, flow and monthly subscription system, to provide differentiated services with different billing methods. Through CNM, customers can see the overall business view of the lease, understand the link situation, lease port, port failure status, port flow information and other basic conditions. All these fully guarantee the manageability of the optical network operation.

With the development of intelligent Optical Network characteristics in MSTP, the network has the topology automatic discovery, the route automatic discovery and the mesh network protection function, on the one hand makes the bandwidth to provide, the service configuration is more flexible, the network protection route is richer, the bandwidth utilization rate is higher, on the other hand the interoperability of the optical network system between different manufacturers will also be improved. From the development of technology to ensure the optical network operation direction. With the carrier's concern and development to the different parts of the telecom value chain, the transmission network gradually moves from the basic supporting network to the core operation network provided by the integrated service, and the MSTP of the next generation SDH equipment adapts to the demand of the transport network operation.