Thoughts on the construction of data metropolitan area access network

Objective:
Human beings have entered the era of network economy. With the continuous development of the Internet, the user's business needs are increased exponentially, the load of the network increases sharply, in this case, the network broadband has become the focus of the construction of information superhighway. However, how to achieve better enterprise benefit in the increasingly competitive situation depends on the access bandwidth and business satisfaction of key customer groups. In the current user bandwidth requirements, 2M and 2M below the data also occupy a significant proportion. Therefore, metropolitan access network as the basic layer of the entire telecommunications network, not only the broadband backbone business access and extension, more importantly, should be able to fully meet the needs of all kinds of large users of data bandwidth.
The status of Metro access network
As of June 2000, China's urban telephone penetration rate reached 32.1 per hundred people, the major cities to reach or more than 50 per hundred people, residential telephone proportion to 81.6%, but the phone is low. From the business point of view, voice business is still the proportion of the first, accounting for more than 70%. With the development of data service, DDN node machine, ATM, IP backbone network construction has formed a certain scale, based on broadband video on demand, distance education, telemedicine and other value-added services have emerged; Internet network development in the ascendant, Isp/icp/iap a large number of emerging; intelligent community, Soho and other users appear, with the enterprise network, Government network, campus network, hotels, financial securities, commercial and residential buildings together constitute the metropolitan area network of large customer base.
Among the various user categories, 5 types of major customers: Group Enterprises (including government agencies), small and medium schools, large and medium-sized school, Financial securities, intelligent community is the focus of competition among operators. How to meet the different bandwidth and business requirements of these large users is the soul of the construction of Metropolitan access network.
According to the results of the CTIA survey, the bandwidth of the 2M and 2M in our cities can basically meet the needs of about 85% of the user's business. In other words, in the construction process of the metropolitan Access network, the focus should not be limited to the current broadband access network, but should pay attention to the bandwidth requirements of various large users. The analysis of various users shows that the demand of narrowband data and broadband exists simultaneously. As a carrier, should be able to provide a comprehensive access means and targeted business, will get the good loyalty of large customers.
The following is an analysis of business and bandwidth requirements for major customers in the city:
Can be seen: in addition to ADSL and LAN access technology can bring the 2-10m bandwidth requirements, large users of narrowband data business needs more, bandwidth concentration in 64kbit/s-2mbit/s.
And the reality is: the demand and potential demand of large users exist for a long time, but the access bandwidth is lagging behind, and the subdivision of large users is also a matter of recent concern. The user's business demand is always limited by the access bandwidth, but the potential increase based on the original bandwidth can not solve the new business needs fundamentally.
This trend can be seen from the development and application of access networks: with the continuous extension of access network, the user's various services will be provided by the access network, access network in the PSTN, DDN, IP/ATM networks optimization and interoperability process, will be a voice, data and video in one broadband integrated services access platform. In the domain of Access layer, all voice, narrowband DDN data, all kinds of broadband services and value-added services should be provided by a unified platform.
Analysis of bandwidth requirement of large user
There is often a lot of talk about developing business and meeting users ' business. So what is the relationship between business and bandwidth? In fact, business and bandwidth are interactive relationships: bandwidth is the basis of business development, business development must rely on the development of access bandwidth, while the rise of business, especially value-added services, has greatly facilitated the expansion of access layer bandwidth, the access to the bandwidth proposed higher demand. So the following analysis of the user mainly around the bandwidth.
(1) Group Enterprises
Group enterprises, including government agencies, large enterprises and other units, its characteristics are: a large number of computer terminals and internal LAN, the need to provide high-bandwidth, shared access to the Internet, to address the needs of users of the Internet. Most large groups also have a large number of remote branches, the need to build a unified information network, hope to be able to provide low-cost, safe and efficient solutions, with conference TV and other high-quality video business needs, want to provide full business access, price-insensitive. The bandwidth requirement is greater than 2M.
(2) Small and medium-sized enterprises
SME user characteristics: User computer terminals are not many, but hope to be able to provide a higher rate (>56k), sharing the way of the Internet, but the bandwidth requirements are not high. Some enterprises for the implementation of corporate Internet or e-commerce, the establishment of corporate websites, need to connect to the Internet. No video business needs, very sensitive to price. Low bandwidth requirements of small and medium-sized enterprises, can provide low-cost narrow-band DDN/FR and other ways to solve the user's demand for data services, in the low cost of broadband access, it is appropriate to develop IP/ADSL access.
(3) Chung-chung School
Large and medium-sized School user characteristics: Most of the school building has a local area network, and the interconnection between the needs of the Internet users (students) intensive, the need for a cheap, high-speed Internet access. The use of data network for distance teaching needs, users want to be able to provide a low-cost Internet solution, while solving the campus data network building needs. IP access is a good way to solve this problem.
(4) Financial securities
Characteristics of financial Securities users: The data service demand is single, mainly for data terminal network, the number of user data terminals large, distributed geographically wide. Low-end users of the data business bandwidth requirements, high security requirements, high-end users of data business requirements, high security requirements, business volume, confidentiality and QoS requirements, price-sensitive, and users want to be able to different levels of users to provide different price solutions. For such a large user, the DDN access with high QoS guarantee is combined with the high-speed LAN interconnection based on ATM, which can basically meet the requirements.
(5) Intelligent Community
According to the overall goal of the National residential District Intelligent System Engineering: the construction of intelligent community is to adapt the modern information transmission technology, network technology and information integration technology, carry on careful design, optimize integration, elaborate construction and engineering demonstration, improve the content and living environment level of the high technology of residence, in order to meet the demand of modern living life in the 21st century. The characteristics of Intelligent Community users: users need to be able to ensure high-speed Internet access, and through a unified access platform to provide automatic meter reading, property monitoring and other intelligent management. Video on Demand (VOD), online education and online medical and other video business needs, community properties need to maintain the development of community value-added services, users want to be able to use a unified broadband platform to provide users with intelligent value-added services solutions. For the construction of intelligent community, the main broadband access, such as ADSL, LAN and other broadband community construction.
From the above analysis, we can see that: the construction of Metro access network has shifted from carrying voice based services to providing a variety of data bandwidth changes. With the opening of telecom market and the rise of multiple operators, the services provided by the company are mutually complementary and fundamentally changed with the traditional single telephone service, and the essence of competition is the contention of user access bandwidth.
Honet Metropolitan Access Network Solution-SBI Super Bandwidth component strategy
Different types of user requirements of the business, resulting in different user requirements for access to the bandwidth vary, the need for telecommunications operators in accordance with the characteristics of users to put forward a personalized solution. The main concerns of operators: Metropolitan access network equipment and its existing data equipment access is convenient, whether to establish a reasonable tariff policy and provide timely and reliable after-sales service, as well as the availability of solutions to the development of the Huawei's Super Bandwidth access solution 桽 BI Strategy provides a flexible and comprehensive means for the construction of Metropolitan access network.
Sbi-super bandwidth infrastructure, super bandwidth architecture, is the use of FTTB (Business) way, with access network equipment to meet the bandwidth needs of various users, occupy the commanding heights of network access and competition, For commercial users to provide a full range of bandwidth solutions, as well as good after-sales service to meet customer current and future business expansion. Under the competition form, the SBI strategy is the best means to occupy the big users.
Corresponds to the access network device, sbi=n*b-nod+ 1* OLT, where B-nod is called the bandwidth node, is equivalent to the ONU device. ONU as a bandwidth node, with the fiber-optic cable to provide large users with a variety of bandwidth required to provide large users with a package of solutions, is the core component of SBI strategy. Bandwidth nodes do not need to be managed, providing centralized management, monitoring, testing, configuration and other functions on the Olt side. B-b-nod according to the user line capacity and the use of the environment are divided into the following series: onu160b,onuf01a,onuf02a,onu512a,onu512c,onu512d,onu1000a, to meet the different conditions of user requirements.
According to the geographical distribution characteristics of large users, there are 2 types of B-nod: Single mode and mixed mode. The single mode mainly refers to the large customer distribution is more concentrated, from the physical attributes of the single mode of view. Generally located in office buildings, commercial and residential buildings, the user access capacity below 1000 lines, business needs include voice, data services. Voice business is mainly Centrex business and value-added services, such as: Call transfer, CID, long-distance busy and so on, leased line bandwidth to nx64k, business type for the Internet or LAN interconnection. Because the large customer distribution is more concentrated, so the demand for the special line business is relatively concentrated. Mixed mode mainly refers to a variety of large customers belonging to a business node area, from the physical distribution characteristics of the mixed model. User access capacity is below 2000 line. The business requirements of large users are basically the same as the single mode. In mixed mode, the bandwidth requirements of various users vary widely. In the same bandwidth access point B-nod, according to the category of large customers, unified to provide a wide range of bandwidth, give full play to the B-nod integrated access advantages.
The SBI strategy focuses on the bandwidth requirements of the major customers of the business access point and presents a package solution based on the type of large users. B_nod can be a separate network, but according to the urban large user distribution is not concentrated, the type is complex, the capacity is unequal, can compose the ring type, the tree type, the star type and so on the topological structure, the recommendation best networking strategy is uses the Sdh/apon mixed transmission, b_nod the more points cloth puts the principle to solve the big customer bandwidth problem SBI bandwidth to provide a platform-oriented approach, combined with flexible networking, to meet the city's large customers multi-level needs of multi-level.
According to the bandwidth requirement characteristics of large users, the SBI strategy is as follows:
(1) Group Enterprises
SBI strategy--according to the specific situation of broadband backbone network, the use of broadband ADSL, LAN and other access technology, combined with SDH/ATM/IP network technology, the B-nod placed into the building and intelligent wiring system, to provide users with convenient broadband access.
(2) Small and medium-sized enterprises
SBI strategy--according to its demand characteristics, B-nod uses ADSL, DDN, n*64kbit/s, 64kbit/s and other data interfaces.
(3) Chung-chung School
SBI strategy--mainly provide the means of interconnection of LAN, B-nod out 10/100base-t interface.
(4) Financial Securities users
SBI strategy-for low-end users, mainly provide a full range of DDN data interface:
2.4KBIT/S--19.2KBIT/S (v.24), 64kbit/s (v.35/v.24), n*64kbit/s (v.35), e1,2b1q and other interfaces; For high-end users, mainly provide 2b+d,n*64kbit/s,10/ 100base-t and other interfaces.
(5) Intelligent Community users
SBI strategy--for the different patterns of community construction and the characteristics of the community, ADSL and LAN community, B-nod provide end-to-end solutions, IDT (Intelligent terminal equipment) to provide a variety of serial port access to the user's home a variety of terminals, such as water meters, meters, gas meters and other access to the Community property Center B-nod provides ADSL interface while providing 10/100BASE-T access to various servers in the community, supporting a variety of billing methods.
Conclusion
The construction of Metro access network should be based on the subdivision of users and bandwidth requirements, take into account the current needs of customers and long-term demand, with comprehensive data bandwidth SBI strategy to occupy the strategic commanding heights of network access, in order to be in the fierce market competition, invincible.