Benxi Netcom IPTV Network Building Programme

At present telecom operators traditional voice business relative saturation,but its broadband Internet access and application business is in a stage of rapid development. With the continuous growth of broadband subscribers, development and utilization of broadband network platform to enter the field of broadband television, a telecommunications operators to improve the strategic importance of business income. Whether at home or abroad, this is an important. rapid development trend.As the network transmission technology and the maturity of streaming media technology, high-speed Internet to provide television service is a reality. In recent years, broadband networks based on IP set-top boxes and the IPTV service has become a hot market, has become the telecom operators the focus of attention. IPTV market is one of the greatest prospects for broadband value-added applications, the development of IPTV in terms of telecom operators in promoting broadband access business development, expanding broadband multimedia applications, value-added telecom services to increase revenue, improve the competitiveness of enterprises, and other aspects Is very important.1. The key IPTV technology and its applicationIPTV key technologies including coding options, multicast technology applications, content distribution network CDN and Electronic Program Guide.①Encoding Options According to the three audio and video compression codec algorithm to compare the characteristics, including MPEG-4 and WMV9 as the current relatively mature audio-video coding standard in the same video quality close down yards.According to the MPEG-4 standard itself can be more options, operators need to regulate standards to ensure interoperability among vendors. WMV9 is a private, non-MPEG-4 and similar shortcomings, but the openness of the poor standards H.264 as the next generation of audio and video coding standard in the same yards down video quality than MPEG-4 and WMV9 a considerable extent, can not increase bandwidth circumstances greatly enhance the quality of IPTV business, a conditional future The main large-scale commercial coding standard. Therefore, the Liaoning Netcom selected as H.264 IPTV future encoding formats, but because standards, the system costs, and other various reasons, the temporary choice as MPEG-4 encoding format, H.264 to be mature after the transition to the H.264 .②Multicast Technology ApplicationAccording to the location multicast replication, in the online multicast IPTV bearing the realization of the following two ways: (1) Broadband Access Server (BRAS) support multicast, such is not suitable for large-scale multicast IPTV means the network, But applicable to IPTV service in the early stages. (2) DSLAM support multicast, multicast mode suitable for such large-scale IPTV business Liaoning Netcom is part of a network of ATM DSLAM is still the kernel, multicast capability is not strong. So Liaoning Netcom IPTV business of the live broadcast system currently used mainly BRAS multicast copying. The program provides direct distribution of video streaming to the edge POP, POP will be set at the edge and video streaming to the BRAS, BRAS multicast replication completed work, and through the channel PPPoE sent to the user.③Content Distribution Network and Electronic Program Guide To ensure that the content distribution network (CDN) utilization, in Liaoning Netcom IPTV system planning in accordance with the user's "80/20" of the design. "80/20" rule that 80% of the VOD users watching 20 per cent of the programmes. Based on this rule, the Cache node CDN space programme should be a centre for space the size of 20%, this can guarantee 80% of the users may Cache node programs directly without downloading the program from the Centre programme, this will be conducive to improving user response time and reducing network traffic.In Liaoning Netcom IPTV system, electronic program guides (EPG) the realization of a set-top box EPG server to the user to provide HTML pages approach. IPTV system programs and information stored in the database, EPG server from the database retrieval programs and information to HTML pages provided to the user in the form of set-top boxes, the set-top box analytic engine HTML pages after the user is presented. Users request the relevant information through the set-top box to return to EPG from EPG to the corresponding treatment.2. Benxi Netcom IPTV network building programmeThrough the Benxi broadband network status and is now carrying the IPTV business feasibility analysis, the IP bearer network of rehabilitation programmes, broadband access network optimization and deployment of QoS MAN, IPTV authentication methods and MAN Use of Multicast was discussed.①IP MAN's Transformation ProgrammeTaking into account the Internet business and IPTV mixed loading operations vulnerable to lead IPTV Internet business disruption, should adopt the idea of dual-plane, the Internet and IPTV services were carrying, and fully guarantee the safety of IPTV business and QoS. MAN only the original PC carrying the original Internet business. CDN with a combination of new technology for video multicast distribution of carrying the network, to provide users with QoS can guarantee that the IPTV business. On-demand business CDN technology can be used to program information as possible to push the edge users; business to the live form of multicast network, core network equipment should support the region multicast PIM-SM. At the same time broadband access networks carrying video and PC online business, business to do access control layer separation, respectively, into the different bearer network.②Broadband Access Network OptimizationWith IPTV users development, Benxi MAN Netcom may consider the star + Ring Network programme, the use of RPR convergence of the Central Link router and BRAS, SR, in order to achieve unicast and multicast flow of business Separation of transmission. One Xingxingjiegou for carrying unicast traffic, and the ring bearer for multicast traffic.③MAN QoS DeploymentStage 1:SR12 routers on the convergence layer for the deployment of the following: PTV in the SR12 connect the edge of the interface, all ingress traffic will be marked as a high priority QoS, DSCP value 5. Even in the SR12 BRAS under the direction of the export port GE, Scheduling, IPTV flow configuration for polling queue, a bandwidth of 30% of link bandwidth (300M).BRAS equipment for the deployment of the following: BRAS equipment in the port of export GE downlink direction, Scheduling, IPTV flow configuration for polling queue, a bandwidth of 30% of link bandwidth (300M). In BRAS for each user on the two business flow traffic shaping, and give priority to the flow of bandwidth IPTV service under the premise of guaranteed DSL lines into two business flows and, bandwidth than DSL lines. Stage2:DSLAM by modifying the configuration of complete IPTV users MODEM double up the transformation of PVC. MAN control of the business in the new dedicated IPTV access router(AR). MAN through different VLAN different VLAN, and the delineation of the different paths the uplink, complete separation ordinary business broadband Internet access and IPTV business data flow, integrated perfect the original QoS strategy.④Certification Means of IPTVIPTV authentication methods including PPPOE certification, DHCP authentication methods and static IP address, current, and Benxi, users generally use the ADSL PPPOE means that access. PPPOE certification of the way through the pros made the following comparison of optimization: First, the network bandwidth and relay BARS performance and the number of adequate planning and, if necessary, network expansions, and ensure MAN on the carrying capacity of IPTV business. Second, MODEM, the corresponding DSLAM equipment upgrading, in a dual protocol stack structure, will be moved to the next point multicast replication DSLAM equipment.⑤MAN Use of MulticastThrough multicast technology, we will be able to go to multicast replication business point of access control points (BARS or specialized IPTV access routers), or even move to DSLAM Ethernet switch level, significantly reduce the City Area Network bandwidth pressure. In this paper, static multicast routing, dynamic multicast routing methods and MSDP+MBGP+PIM-SM Multicast routing scheme manner in Benxi MAN pros use to contrast.3. Benxi Netcom IPTV business development forecastIPTV will be the emergence of Benxi Netcom may be stimulating rapid development of broadband networks once again a key application. Through IPTV platform, and Benxi, China Netcom can provide rich, personalized video programming, as well as many other value-added services, thereby stimulating domestic broadband access business to widen the scope of users, and change the current bandwidth was basically rely on rental income broadband business situation, effectively enhance ARPU value. IPTV business in the promotion process, we must first do a good job in market analysis, business positioning, to arrive at a reasonable operating mode, development of appropriate marketing strategies to be able to play a real Benxi Netcom IPTV network tremendous commercial potential.