Managing your broadband network into profit: for wireline telcos and ISPs, broadband services are the key to future growth. Yet managing and operating a broadband network is a different proposition from previous networks – Advertorial
GETTING TO PROFIT
Service providers need to be aware of these key factors when preparing their broadband offerings
Broadband is not the same as the Internet
The Internet should be regarded as one of the broadband service networks, along with VPN, the voice network, and so on. Different service networks can offer different revenues, and hence a broadband network should be able to support multiple service networks.
A broadband network needs to be managed
A broadband network should offer different levels of QoS and different capabilities, such as anti-hacking measures, bandwidth control, flexible billing functions, security and so on. Bandwidth requirements also must be managed. To achieve greater cost-effectiveness, we must schedule the bandwidth and QoS for different services, and charge according to bandwidth.
Broadband needs a profitable value-chain
The failure of many Internet content providers (ICPs) has demonstrated the difficulties they face in obtaining reliable revenues. Broadband service providers must foster an approach which assists all participants in the value-chain to make a profit. Carriers are well-placed to act as hubs linking users with content providers.
In building profitable broadband telecom networks, service providers must provide these solutions
To ensure user management, which user packet labeling, authentication, authorization and bandwidth control, the B-RAS must interwork with access devices. The common labeling technologies are PPP, PVC and VLANm, while common authentication technologies are PPPoE, PPPoA and WEB.
Hackers have proliferated as the Internet has expanded. Huawei provides a number of solutions. First, access devices can be used to separate users from each other, and to sign and locate users utilizing PVC or VLAN. Second, binding IP, MAC, and ports in a user management list is also effective. The third method is an access control list (ACL), which can control the switching of packets on layer 3.
Flexible billing can help to increase the user base. Billing may vary according to duration, traffic, or content, or by mixing these approaches. Traffic-based billing helps to manage bandwidth consumption. For some types of users, carriers could also offer prepaid broadband, while content-based billing could also help the development of ICPs.
QoS on the Internet is low, so it makes for limited revenue. If carriers want to develop value-added services such as VPN, multicasting and multimedia, then they must improve QoS. Different services have different QoS requirements, and bandwidth schedule and traffic project should be implemented. The major forms of assurance are CAR (Committed Access Rate), 802.1p, MPLS, and RSVP.
The number of devices in broadband networks is much greater than that in traditional narrowband networks. Therefore, operators need new technologies to reduce the elements of management and the number of IP addresses for the EMS (element management system). User line testing and environment monitoring are also needed just as in the PSTN.
BUILDING BROADBAND IN NANJING
In 2000, China Telecom began to build a broadband network in Nanjing, one of China’s largest cities.
The convergence layer was made up of about 30 large-capacity L3 switches. At the access layer, small capacity L3 switches worked with L2 switches to serve such high-density areas as MTU, MDU and residential cells. The DSLAM provided universal coverage and interconnected with IP core network through the existing ATM network.
But later, the carrier found that the fixed monthly charge approach blocked growth of end-users and ICPs, while ADSL traffic jammed the gateway between the IP network and the ATM network.
To solve these problems and put the service provider on the path to profitable growth, the broadband network was modified in late 2001.
The SmartAX MA5200 acts as distributed B-RAS, managing both ADSL and Ethernet users. It provides IP+MAC+VLAN binding technology to prevent unauthorized access, and the CAR function to control user bandwidth and 802.1p to ensure QoS. The SmartAX MA5100 acts as the DSLAM, connected with the MA5200 through the FE optical interface. The ADSL Internet traffic flows into the IP network through the MA5200, instead of through an ATM network. In case there is a requirement for frame relay or leased line service, the MA5100 will be connected with an ATM network at the same time.
The Quidway S series LAN switch supports VLAN by port and 802.1p. It is deployed in a building to offer Ethernet access, and links with the MA5200 through optical FE. Currently the Nanjing network serves 80,000 ADSL users and 40,000 Ethernet users and can scale up to potentially several hundred thousand customers.
Thanks to Huawei’s philosophy of building broadband networks for profit, the network is now a robust and highly functional engine for business growth.
COPYRIGHT 2003 Advanstar Communications, Inc.
COPYRIGHT 2004 Gale Group