With the transformation from text to flow medias such as the audio frequency, video,etc. of content experienced that people surf the Net, bandwidth demand is being heightened and assaulted the land network of the city constantly, how to promote the network bandwidth to become the important subject that the land network of the city is being newly built or transformed. After all, scale dispose FTTH solve kilometer of problems only, and city land network loud to disappear than the network, there is a car just as every household to improve the condition of going out, but the traffic of the road is developed out of step, go out congested, people get back to the intersection of traffic and inconvenient state. So, FTTH only goes out of the first step of door, there must be land networks of cities and offer the great broadband that carries the end, could solve and go out on the issue to block up, guarantee the flow is unblocked, promote users to experience. ... Read more
3G city land network mainly there is new Ethernet strengthen technology of Ethernet or telecommunication grade Ethernet Technology, IP/MPLS three layers bear the weight of technology and PTN technology. ... Read more
Not long ago, the development of each regional broadband and video business in the world of 2008 that the broadband forum was announced. This report reveals, even if global economy is influenced by financial storm, but the news from broadband and video field is still exciting. Up to the end of 2008, the global IPTV user’s total number is up to 21,700,000, has increased by 63% compared with the end of 2007. The broadband forum thinks, people are still in the trend of rising to the demands of broadband and video business. ... Read more
Under the trend that the LAN merges with the wide-area network, the city land network is rising in the scale, in the intersection of E-government and network, the intersection of education and scientific research and network, the intersection of broadband and the intersection of city and the intersection of land and the intersection of network and field, VPN from backbone to assemble, shift business. ... Read more
The birth of a new technology is inseparable from influence of the great environment of the market, one that is with firm network broadband IPTV market before and after 2005 is burning hot to expedite the emergence of one grade of ether CarrierEthernet of telecommunication Technology is similar, the market of movement broadband beginning to enter high-speed development period in 2007 generates a key impact on birth of PTN. On CE and PTN requirement in telecommunication grade QoS is similar, all a kind of application in one grade of land networks of city of telecommunication of ether technology. But PTN technology increases and moves the unique demand born the weight of, includes supporting PWE3/MPLS MPLS-TP of TDM/ATM/Eth Bearing capacity of the business and supporting the synchronism that the network moves ahead simultaneously with Tai Wo IEEE1588v2 technology. On the network size at the same time, the quantity of base station of a city is far greater than the quantity of DSLAM, this has just determined to require higher to PTN on group’s Nets’ ability. ... Read more
Under the drive of the telecommunication service IP, convey technology and data technology to draw lessons from each other, tending to merge gradually. The question of perplexing operator and apparatus producer at present is the complexity of the land network demand of the city and bears the weight of the uncertainty of the technological route of the network. All kinds of views exist as to the developing direction of the land network of the city, including the end goes to the end PTN scheme, end to go to end IP/MPLS scheme and telecommunication grade Ethernet to insert and assemble IP/MPLS key network scheme etc.. ... Read more
1,Background and goal ... Read more
At present, the land network of the broadband IP city has already begun to take shape in China, increasingly many users have already realized the advantage of the broadband network, the broadband access becomes users’ primary access way. Operators such as China Telecom, China Netcom, CHINAUNICOM,etc., according to its own user’s development, have built up their land nets of own broadband IP city in a lot of districts and cities of China. ... Read more
Fiber optic communication is to carry on the communication way transmitted with the optic fibre after various electric signals are modulated through the light wave. Fiber optic communication is different from wired electric communication, the latter utilizes the metal media to transmit signals, fiber optic communication is to utilize the transparent optic fibre to transmit the light wave. Though light and electricity are the electromagnetic wave, frequency range differs greatly. ... Read more
IT day by day which enterprises and the VIP customer employed, make traditional the intersection of ATM and the intersection of special line and network or exchange until key the intersection of MSTP and network of structure unable to meet the VIP customer employ the loud bandwidth effectively with circuit, many business, IP and flexible new demand that covers. In order to solve this problem, many one grade of land network technology of city of business operator of conveying the network arises at the historic moment on the basis of dividing into groups, it supports the two-way connection passway facing packet switching service, is suitable for various thickness particle business, capable of carrying to the network of group of the end, the ones that have offered and is suitable for enterprise’s VIP customer’s many business characteristics more ” Flexibility ” Transmit the pipeline; Having inherited the operation of SDH technology, managed and safeguarded the mechanism at the same time, it is the rational choice facing future VIP customer’s special net gradual progress. ... Read more
