EV-DV is the best choice in the process of CDMA2000 evolution

At present, after the CDMA network upgrade to the cdma20001x, what way should further take the transition to 3G, the global communication world is launching the intense discussion. In our country, this is also concerned about the development of CDMA industry people's common concern.

There are two ways to transition from CDMA to 3G: one is to transition from cdma20001x to ev-do, then to EV-DV, and the other to direct transition from cdma20001x to EV-DV.

Technical features

The main technical features of ev-do include: the data rate up to 2.4MBIT/S can be supported in the 1.25MHz channel, the cdma20001x is not available, and the specialized spectrum required for ev-do needs to be deployed.

The main technical features of EV-DV include: support the data transfer capability of the peak-3.1mbit/s/sector, support real-time and non-real-time services, be compatible with is-95a/b and cdma20001x, and support data and voice services on the same carrier.

Ev-do uses a separate carrier support data service, which supports high speed data services with a peak rate of 2.4mbit/s in the 1.25 MHz channel, while EV-DV in a 1.25MHz channel, it can provide both voice and high-speed packet data services at the highest rate up to 3.1mbit/s. The spectrum utilization ratio of EV-DV is higher than ev-do.

Operators can use the 1 x EV-DV features to simultaneously provide voice and data services on the same channel, thus flexibly and efficiently utilize the spectrum. Combined with the load management functions of specific systems, operators can further manipulate the use of wireless resources, such as operators can distribute channels according to service categories, or control the use of channels in the form of reserved capacity. (Computer science)

Network Investment Analysis

It is the operator's concern whether the existing investment can be used well again. Because 1xev-do cannot be technically cdma1x-compliant, more new network units are needed to provide 1xev-do services. The EV-DV can realize is-95a/b and CDMA 20001X, and can make full use of the existing 1x network equipment, and the required hardware upgrades will be limited to the BTS air interface part.

From the point of view of protecting existing operators ' investment, EV-DV's greatest advantage comes from its post compatibility. One of the goals of the 1XEV-DV standard is that it must be able to continue to support voice and other existing services, so most of the current CDMA2000 standards are included within the 1XEV-DV standard. At the same time, operators to provide additional data capabilities at the same time to the 1x network equipment reuse, so that the network easily upgraded to 1XEV-DV.

Comprehensive analysis

Comprehensive above analysis, China's CDMA operators need not rush to deploy ev-do network, can EV-DV network mature, direct deployment EV-DV network.

From the perspective of return on investment, do as a data service network grafted on the 1x network, its construction needs to add some new network elements that are not in the 1x network. In addition, a new network requires a rich and lucrative data business market to recycle investments in ev-do networks.

However, the current reality is that the domestic data business market is not mature, mainly includes two aspects: first, the ordinary users have not yet to high speed data services show a high enthusiasm; secondly, there is a lack of a large number of content providers can develop rich content. These two reasons are interrelated.

At present, China's data services based on the 2.5 generation has not been widely promoted, most people still use the 2nd generation of terminals and services, limited data business needs can fully use 2 and 2.5 generation system to meet. This shows that users lack of strong demand for data services, which is a very critical issue.

Second, content providers are becoming an important link in the value chain of mobile data services. The rich content of Korean data business is a necessary prerequisite for the success of Korean operators ev-do. Compared with South Korea, China's content provider's strength to be weak.

Therefore, from the current situation in China, CDMA operators should use the existing 2.5-generation network, actively cultivate the data business market and develop a number of outstanding content providers. After 1-2 years, the domestic mobile data business market is truly mature, you can directly deploy EV-DV network. Because at that time if the EV-DV smoothly to achieve commercialization, and also more mature, ev-dv of course is the best choice, if not the smooth development of mature, then choose ev-do or what other better technology is not too late.