On Radio And Television Cable Network Reconstruction Of Two-way - Two-way Network, Cable Television,

Abstract: January 13, 2010, Chinese Premier Wen Jiabao chaired a State Council executive meeting

, decided to speed up the telecommunications network, Radio and TV The progress of network and Internet triple play. In response to the threat of other operators to meet the triple play era, Radio Reconstruction of two-way network is imperative, paper, from radio and television network, the user's access bandwidth requirements, discusses the access network for radio and television transformation model.

Keywords: HFC Network, CMTS, EPON, EOC

Of: Wuhan Yangtze Optical Technology Co., Ltd. Jin-Hua Wu

For different operators, using what technology to build backbone networks, MAN is basically the same, and investment in network construction primarily in the device input, no cases of Radio and Television Department. The construction of a new access network, the network construction investment is mainly in line construction, because the business is carried out gradually, so the cost can be covered, while business quickly is the key.

Radio and television broadcasting one-way traditional business is business, the traditional HFC network is a multipoint tree network structure. Cable Abundant resources, is relatively close to the user, but generally tree network structure. Radio has the biggest advantage is that more households Coaxial cable Of-home resources. Coaxial cable operating frequency can reach 1GHz, with the national digital television Overall conversion In advance, there will be more left vacant frequency resources data communications, and with the development of modulation techniques Hz frequency band for each bearing more and more bits.

Transformation of the current broadcast access network technologies are mainly two categories is the CMTS + CM, one is EPON technology. Must be considered when using EPON technology-home technology adopted is five lines households? Or coaxial cable households (EOC technology)? Five line-home technology is most mature, but because five lines 100m transmission distance limitations, as well as households and construction issues, there is a higher coverage costs, operational issues such as opening a long cycle, it does not apply. Even in telecommunications, FTTB + LAN mode is also only for the network construction of new quarters. EPON + EOC compared to EPON + LAN is more suitable for two-way radio and television network of the old city reconstruction, and also demonstrates the characteristics of radio and television.

Affect how operators upgrading the access network, another factor is the bandwidth required for users to access, so the following access bandwidth from the start, to analyze the CMTS + CM, EPON + EOC cost of these two access methods.

Access bandwidth analysis: Traditional Internet business there are some basic features, such as acts of sudden, on the delay is not sensitive to low upstream bandwidth; But with the continued emergence of new Internet business, the user concept of consumption and consumer behavior also occurred change: from simple web browsing, send and receive e-mail and other basic applications turned Video , P2P, online gaming, large-scale applications, and because the Internet entertainment and communication functions continuously enhanced, enabling users online rate and complication rate has greatly increased, these are access network bandwidth, network latency has a higher demand and on the downstream bandwidth gap is also decreased.

For radio and television operators, broadcast television, whether SD or HD , HFC networks are still the most economical means of transmission.

The following table is a rough business access bandwidth analysis.

Business access bandwidth of 1), IPQAM way Ordinary Internet service access rates 30%, VoIP service access rate of 10%, 30% interactive service access, a 50 in the optical node of the downstream bandwidth to: 50 * 30% * 2M +50 * 10% * 0.1M = 30Mbps, upstream bandwidth demand: 50 * 30% * 0.5 +50 * 10% * 0.1 +50 * 30% * 0.02 = 8Mbps.

High speed internet service access rate 30%, VoIP service access rate of 10%, 50% interactive service access, a 50 in the optical node of the downstream bandwidth to: 50 * 30% * 4M +50 * 10% * 0.1M = 60Mbps, uplink bandwidth as: 50 * 30% * 1 +50 * 10% * 0.1 +50 * 50% * 0.02 = 16Mbps.

2), IPTV means Ordinary Internet service access rate of 30%, VoIP service access rate of 10%, 30% interactive service access, one 50 of the optical node of the downstream bandwidth to: 50 * 30% * 2M +50 * 10% * 0.1M +50 * 30% * 2M = 60Mbps, upstream bandwidth demand: 50 * 30% * 0.5 +50 * 10% * 0.1 +50 * 30% * 0.02 = 8Mbps.

High speed internet service access rate 30%, VoIP service access rate of 10%, 50% interactive service access, a 50 in the optical node of the downstream bandwidth to: 50 * 30% * 4M +50 * 10% * 0.1M +50 * 50% * 2M = 120Mbps, the uplink bandwidth requirements for the: 50 * 30% * 1 +50 * 10% * 0.1 +50 * 50% * 0.02 = 16Mbps.

CMTS + CM and EPON + EOC cost analysis of two access methods

Because the CMTS to provide the bandwidth is limited, consider the following IPQAM only way, the initial user access bandwidth demands such a situation, and the optical node 200 according to plan (taking into account the actual transformation of optical node coverage CMTS User relatively large size), each CATV optical receiver 4 RF outputs, each output cover 50 users, passive coaxial distribution network.

CMTS + CM (2 million users in the sub-front, 100 optical node)

EPON + EOC (2 million users in the sub-front, 100 optical node)

From the above analysis we can see, both cover the cost or the cost per household, CMTS + CM transformation methods are obviously inferior to EPON + EOC transformation method. Transformation even in the line (cable) side, CMTS + CM need room in the optical node to the front of the laying of a sub-return core optical fiber, the front room that points to the optical node is a star network, with the original tree optical distribution network is not. The EPON network structure and network structure of the natural integration of radio and television, generally laying cable operators will be considered when a certain redundancy, thus making a two-way network without the need to change light distribution when the transformation of a large network.

by:gaga

POST COMMENT

The Importance Of Home Firearm Safety Home Safety Without Expensive Alarm Monitoring Radio Shack Store Locator And Locations Nearest You Inverter Technology Development And Needs Analysis - Electron Devices, Frequency Converter - The Computer Safety Guidelines And Tips For Using Your Computers Possible Energy Sources For Your Electronic Gadgets Electronic Medical Records (EMR) Made For Texans, By Texans Is Your Safety In Good Hands With Fish Oil? Electronic Record Management Technology & Healthcare Organizations Large Or Small, Led Light Bars Are Just What You Need To Maintain Safety For You And Your Vehicle. Electrostatic Precipitator (esp) For Thermal Power Plants Use Cabinet Cooler to Prevent High Temperatures in Electronic Components Why should I wear safety boots?