Move the sharp increase of the flow demand of the data, the development in wireless broadband technology such as HSPA, WiMAX, bring CDMA a operator big pressure, has accelerated CDMA to performing progress and cutting down of LTE. Then, how is CDMA to LTE smooth gradual progress?
LTE is a gradual progress direction of the future
Move the intersection of data and business, develop rapidly while being contemporary, operator have, face, move the intersection of data and business, increase sharply the intersection of data and the intersection of flow and the intersection of demand and increase severely, the intersection of cost and the intersection of person who compress and challenge that bring. In order to deal with and challenge, and further make profits in moving business of data, the operator prepare the upgrading gradual progress of the existing mobile network actively.
CDMA industry has wandered up and down between LTE and UMB for a time to the gradual progress tactics of the future, in the development process of two kinds of technology, major CDMA operators such as U.S.A. Verizon, Japan KDDI, South Korean SK telecom and South Korean telecommunication KTF,etc. claim to turn to LTE camp one after another, make the industry chain of LTE destine to be riper and completer than UMB in the future. Qualcomm claim to give up UMB in November of 2008. So far, the signpost from CDMA to LTE gradual progress is totally clear. Meanwhile, wireless broadband technology such as HSPA, WiMAX were brought CDMA pressure of a operator, accelerated CDMA to performing progress and cutting down of LTE.
High throughput, prolong when being low and low cost, it is three basic demand that the network developed in the future, the goal of LTE is to cater to these three requirements – -LTE adopts a series of most advanced technology such as OFDMA/SC-OFDMA/MIMO, to realize the throughput of the high data, its goal of the throughput of doing from head to foot, respectively for not lower than 100Mbps and 50Mbpsing; To do away with a hierarchical system the intersection of network and framework LTE, problem of prolonging solve well, business its prolong less than 5ms when the layer, control layer to be smaller than 100ms; And the whole IP framework, flexible frequency spectrum utilize the tactics, SON technology etc. for LTE very large cost advantage.
At present, CDMA such as Japan KDDI, U.S.A. Verizon run the introduction that is being set about preparing LTE in the commercial city.
CDMA grows coexisting with LTE
Though the business of the data is developed rapidly, the speech business still will be the important source that CDMA operator make profits in the future, CDMA network will still be developed continuously within some time. And technology such as HSPA/WiMAX bring CDMA competition pressure of a operator, and the data business is increased sharply and brought the pressure of the network now, have accelerated CDMA operator’s progressing and cutting down to the performing of LTE network. So, the stage when grow that CDMA and LTE certainly will coexist on lifespan. KDDI has been clear recently to superpose LTE network, the development tactics which the two serve together on the basis of existing CDMA network. And Verizon shows clearly CDMA network that finishes being upgraded in 2007 will be run continuously while proposing LTE gradual progress tactics.
From a different perspective, LTE phased tactics that introduces, require CDMA and its coexistence too. The stage of LTE is introduced, means LTE covers the hot area at first at initial stage, offer the high-capacity movement broadband inserting service, cover completely progressively. Cover stage in the focus, LTE offers movement broadband of the regional high speed of the focus service, the intersection of CDMA and the intersection of network and low the intersection of speed and sewing and moving broadband to serve wide to cover with can offer, such stereoscopic service network that melted, let the operator make one’s own operation tactics in a flexible way, offer diversified services. The operation brand that CDMA and WiMAX that SprintNextel puts forward coexist and grow at present, it is this kind of CDMA OFDMA LTE/WiMAX Model of stereoscopic network of melting. Sprint introduces CDMA/WiMAX bimodulus terminal station, devoted to the intercommunication switch of CDMA and WiMAX network, give play to the stereoscopic network covering and comprehensive advantage of the capacity maximizing.
The operator faces two major challenges
At CDMA it and not coexist at LTE and in LTE gradual progress when,last two challenge operator: First, while developing the existing CDMA network, how to guarantee existingly to make an investment in and is protected in the gradual progress of LTE; Second, how about guarantee user in the gradual progress experience, prevent users from retreat network.
To the first challenge, there should be one CDMA and LTE solution of the platform altogether, in order to guarantee the smooth gradual progress from CDMA to LTE, fully protecting has investment. CDMA and LTE the intersection of hardware and platform to the intersection of LTE and smooth to escalate and precondition of the gradual progress CDMA altogether. LTE and CDMA belong to two kinds of totally different wireless technology, the solution of the hardware platform has put forward very high technical requirement for the apparatus supplier to offer different wireless technology altogether. Nowadays the development that the industry appeared to having the wireless product if GSM/UMTS/CDMA/WiMAX takes the development policy which is unified the platform, if apparatus provider have technology already the platform accumulates sure experience technically together, and can apply to the solution from CDMA to LTE gradual progress, it is upgraded that will be smooth to CDMA-LTE and the gradual progress solution one will be put forward and playing a great role. Except the maturity of the platform, on the basis of CDMA and LTE of this platform, it is especially not only performance of LTE but also a question that can’t be ignored. Apparatus provider must in the intersection of research and positive input under process of LTE, make one’s own LTE research and develop the process and walk in the industry forefront, could guarantee the performance based on LTE solution of the platform altogether, thus guarantee the smooth upgrading gradual progress from CDMA to LTE. In addition, the provider’s end will make the sharing to the network equipment of the solution reach and maximize to end ability, strengthen CDMA to the smoothness of LTE gradual progress, protect the investment of the operator.
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