Whom network of service provider adopt to depend on, insert layer, the intersection of edge and layer and key layer, divide into the topological structure of layer in the past. Such topological structure is usually very necessary, because the router at that time was distributed density low, there are only two years too in life-cycle time. ... Read more
LTE project is the gradual progress of 3G, it improves and strengthens the aerial access technology of 3G, adopts OFDM and MIMO to be regarded as the only standard of its gradual progress of wireless network. Under 20MHz spectral bandwidth, can offer the peak value speed of down 100Mbit/s and up 50Mbit/s, the performance of improving the edge users of Residential Area, improve capacity and reducing system of Residential Area to delay. ... Read more
The wireless LAN is being employed from the traditional wireless LAN of non- real-time data to the wireless LAN gradual progress of the integrated service, users, to the service quality QoS Demand grow with each passing day [1 ],last different requirement the business one diversification about network, need the network to offer different service quality QoS assurances [2 ] to all kinds of users and business. IEEE802.11e standard is proposing for meeting the demands for the service quality of the mobile communication business of people, but in the network is larger or the network is topological under a frequent situation of the change, the suggestion value in the standard is often not enough to meet the business demand. How to set up the standard parameter value rationally according to the present network supports and business distribution situation, let adaptive network its, in order to realize the intersection of network and optimization the most of performance, it is one that need problem that solve urgently. ... Read more
The appearance of PTN is to only convey network technology and develop the inevitable outcome under the environment of communication realistic network and business of service provider. Ideal that imagine at first convey network only IPoverWDM whether IP divide into groups until simple encapsulation right to buy building up above the intersection of light and layer of intelligence directly in scheme, right to mix one layer of functions and try hard to simplify, thus is limited within the range of interface signal form, until the unified control level is at all aspects ‘ Grouping, circuit, wavelength, wave tape, optic fibre,etc. Realize the most high-efficiency scheduling of resource of bandwidth of optic fibre. Very early already clear goal this, but maturity of technology its remain time also. ... 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
The summary has introduced the principle of QoS, has described especially that is realized by IxNetwork 5.40 two layers and the methods of testing and steps of three layers QoS, have summarized 5 great advantage characteristics of IxNetwork 5.40. ... Read more
First, scheme summary ... Read more
As employing a kind of very extensive technology in route technology, IP way carrying the important task of route trade development by technology. Believe with the development of communication trade, IP the intersection of route and technology can completion further stabilize too, bring the good network environment to user. ... 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
