PTN meets LTE and bears the weight of the requirement Reconstruct economy and move broadband network
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.
The earliest PTN market demand comes from 2G/3G operators such as European Vodafone, CIS Megafone,etc. in 2007, because move broadband increment and charge and rent too higher factor of cost of TDM chain way with the tradition, the operator needs building one’s own transmission network to lower costs badly; It is judgements of the future thrust to be already in saturation and data business in Europe on the basis of the speech business, operator these hope, adopt based on IP kernel to convey product choose, in network technique of conveying. PTN not only meet the high quality requirement of bearing the weight of 2G speech business but also supports to count and reply by raising conveying efficiency of 3G data business, PTN support to clock synchronization dispelled and moved reliance on TDM of the network fundamentally at the same time. For above-mentioned reasons, these major operators have chosen PTN in many kinds of technology such as MSTP, router, CE and PTN.
Because operators such as Vodafone,etc. will succeed in disposing PTN products in 2008, form the demonstration effect to other operators, 2008- TOP10 transnational operators such as FT/Orange, Telefonica/O2, T-Mobile,etc. are introduced PTN to use for moving construction which bears the weight of the network one after another in 2009. The domestic operator began to canvass the subject that SDH makes the transition in 2007, China Mobile successively organized test three times in 2008- 2009, to verify the maturity of PTN technology, and carried on the pilot project commercial in scale in some provinces. China Telecom will begin to follow and verify PTN technology in 2008, and carry on the commercial verification of Nets in some provinces. CHINAUNICOM is studying and canvassing the application of PTN actively too. Only Huawei Company PTN products have already topped more than ten thousand in the whole world commercial scale at present, major producer put out PTN series products, industrial informationization department release PTN relevant standard and norm too, can be thought to undergo nearly three years of development, PTN industry has been already ripe at present.
The mere network faces improving
Traditional mere network whether MSTP and point reach some wave divide technology into as main fact mainly in market, MSTP to cover, insert, assemble get to carry get the intersection of end and Nets key backbone, the wave divides technology mainly in long-distance key application. Realized IP at first from the operator moved in key network 2004, in this course, convey network wave divide into perform, enter, face big particle and OTN technology that IP bore the weight of progressively by two level from and MSTP too. Insert, assemble layer, the intersection of MSTP and network above the in the world 60% used for, move base station, bear the weight of. With the intersection of base station and IP and broad band, MSTP face the challenge in per bit of cost under the efficiency and loud bandwidth mode of transmitting, under such a background, because PTN technology become more and more, become, take over MSTP, undertake, construct, move primary choice to bear the weight of the network by IP naturally while being ripe already. The industry generally think PTN is that MSTP is inserting and assembling the direction of one layer of gradual progress at present. Can predict with the large-scale commercial arrangement for PTN, inserting the newly-increased construction amount of MSTP network of assembling layer will drop gradually.
Because PTN has combined IP and and conveyed the advantage of technology, has reflected the value that technology merges, so need every producer in IP technology and transmit the network technique and have stronger accumulation, focus on, on the basis of moving and bearing the weight of the unique demand could offer, accord with the intersection of operator and true product of demand. , have producer that technology accumulate and practise at 3G and LTE for some but speech, its may have limitation by product and solution, during construction of network size will store sure technological risk in. Move the intersection of broadband and PTN, convey the intersection of market and pattern of network, change, help those have strong producer of competitiveness in wireless, transmitting and IP technology furthermore.
Because it is to lie in being carried to high quality and low-cost connection ability of the end that the light conveys the main value of the network, the foundation that the end reaches the end is the network mode of group doing away with a hierarchical system, the traditional MSTP network is from inserting to central transmission and managing finishing in the same floor, the transmission course of the business is totally transparent, so is very convenient in management is safeguarded, quality is ensured, it is the best too to the customer’s security.
In view of technology, only convey field PTN and adopt PWE3/MPLS TP at present Have realized TDM/ATM/Eth,etc. moves and fixes the narrowband, broadband business and replies and uses the demand in Ethernet, and realized it on the basis of the synchronous technology of dividing into groups; OTN has realized broadband GE/10GE, FC special line , CPRI the interface of distributed base station When moving and fixing the demand that business high efficiency of the large particle bandwidth, low cost transmit. Face, move fixed the whole business, convey, have PTN and the intersection of OTN and technology, have very strong complementarity.
With inserting and assembling MSTP to PTN gradual progress, the key backbone should keep all network ability of group that convey the network to carry the end to OTN gradual progress, need PTN and OTN to possess the ability to the end to manage, unify the disposition and report an emergency and ask for help or increased vigilance and link in unison of end. Otherwise increase the complexity of operator’s network maintenance and management.
Because of the above-mentioned reasons, PTN will consider to except the influence of the pattern of market of mere network at present every producer is conveying the accumulation of technology and IP technological ability, also consider managerial ability of the network and and factors such as the network OTN/WDM intercommunication ability,etc. now.
Introduce the tactics and have nothing in common with each other
PTN IP flexibility and conveys the integration apt to maintain the characteristic of network, because network background and different in scale, there are certain differences too in the technological tendentiousness while building PTN of global operator. Some less network, such as overseas some sub network of operator adopt, rent, mix group at the network to the intersection of IP and technological demand of flexibility building, network size large, end it reaches carry self-built intensity to be high, CIS, domestic operator,etc. apt to maintain the stronger demand in grade to convey technological telecommunication for instance.
Renting and building and mixing group’s network scene, it is three layers of apparatuses such as the router that the ones that connect with PTN are general, so to controlling the aspect to support some commonly used L3 route agreements to put forward the demand on PTN interface, because the major PTN producer adopts PTN apparatus of the router hardware framework, is capable of expanding in good agreement, so has well met this demand, such as some sub nets of Orange and Telefonica.
Until end reach carry self-built the intersection of PTN and the intersection of group and the intersection of network and scene, it is a close network to be relative to convey network, only need meeting and connecting with RNC, base station on the interface. L2 static group’s network controlled on the basis of the network management is a main fact, in order to improve disposing efficiency, network management and apparatus support some dynamic agreements too. Because such a network is generally a large-scaler network, the operator puts forward higher requirement to PTN easy safeguarding and ability of fast localization of fault. Such as some sub network, Zhejiang moving, Chongqing telecommunication of CIS Megafone, Vodafone and T-Mobile,etc..
Meet LTE and bear the weight of the demand
Our country, with the releasing of 3G license plate, the operator has accelerated rhythm in bearing the weight of network technology and making the transition too. Because wireless technology prones to merging, no matter WCDMA of CDMA or UNICOM of TD-SCDMA, telecommunication of moving will be to LTE TDD/FDD finally Gradual progress, so will all unify and satisfy LTE TDD/FDD finally in bearing the weight of the technological demands of network Above bearing the weight of. To bearing the weight of the network, TDD and FDD main difference lies in moving ahead simultaneously, exists as to the demand two that the frequency move ahead simultaneously, in addition TDD also demands to support time to move ahead simultaneously, though traditional FDD does not need base station to support time to move ahead simultaneously, but because of some broadband business of LTE-FDD future, such as IMB IntegratedMobileBroadcast , it needs to support the time of base station to move ahead simultaneously too to orient service,etc. in base station, so final LTE is unanimous to the demand for bearing the weight of the network. On mainly reflecting in telecommunication grade, the whole scene and apt to maintain ability as to the key demand that LTE bears the weight of the network, degree is very high that these demands coincide with actual ability of PTN products, we can say PTN has already made good preparations ahead of time in LTE was born the weight of.
The rhythm on TD-SCDMA, WCDMA and CDMA base station IP of three major operators is similar, differ by in about one year from beginning to end. But because telecommunications and connecting after the recombination, base station and transmitting resources to need planning and construction again, so will slightly lag behind moving in conveying the IP rhythm of network, moving in test and verification of PTN does a large amount of preparation ahead of time, and promoted the maturity of standard and industry, this shortens telecommunications and connect and introduce research on to investigate cycle in the new technology in fact.
The demand for moving broadband and bearing the weight of has promoted and conveyed the integration of technology and IP technology, PTN only focuses on and moves sustainable development that the key demand of broadband can guarantee the network.