Comparison of CDMA and GPRS

China Mobile GPRS and China Unicom CDMA are the two major focus of mobile communications this year, on the one hand, their pilot operations to make mobile business more colorful, on the other hand, their operations exposed a variety of problems. What about GPRS and CDMA? , where they are primarily compared to mobile data communications services.

GPRS and CDMA have their advantages and disadvantages

Advantages of GPRS

Compared with the original GSM dialing mode of circuit Exchange data transmission, GPRS is packet switching technology, its main advantages are as follows:

"Forever Online" users at any time to maintain contact with the network, no need to establish a connection process, eliminating the WAP login pain;

According to the amount of WAP in accordance with the length of the charge, and GPRS to flowmeter fees, do not browse the Web page or download files without spending money;

The shortcut login is theoretically 3-5 seconds and the network is busy for no more than 8 seconds;

High-speed transmission GPRS transmission speed is theoretically 171.2kbps, considering the network configuration and the different brands of mobile phones, the current speed can reach 20~30kbps;

Automatic switching in the voice business, the data can still be transmitted, users do not have to repeat the Internet operation.

The problem that GPRS faces

GPRS mobile phone lack of market to choose too few mobile phones, and high prices;

A variety of application software needs to be developed at present, a variety of application software for GPRS service is needed.

Rates and billing issues also need to be resolved the tariff and billing methods are very important for the development of GPRS business market, and it is urgent to develop a new rate and billing system based on packet data service to ensure the development of GPRS business market. (Computer science)

Advantages of CDMA

High utilization rate, large system capacity theoretically, the capacity of CDMA mobile network is 20 times times larger than that of analog network, which is 10 times times larger than analog network, and 4-5 times larger than GSM.

Easy to lose the line using soft switching technology, overcome the GSM hard switch easy to drop the shortcomings of the words;

Strong anti-interference ability even in the case of large background noise, can also get better call quality, with large capacity, broad coverage and so on, can greatly reduce investment and reduce operating costs;

"Green cell phone" CDMA mobile phone launch power is low, cell phone battery life long, there is a "green phone" reputation.

Problems faced by CDMA

The quality of network communication needs to be improved

Because China Unicom's CDMA is still in the initial stage of construction, in the coverage capacity, the network's integrity is inferior to the current GSM network, but also can not reflect the technical advantages of CDMA format.

Single type of business offering

At present, single voice service is an important aspect restricting the development of China Unicom CDMA. For operators, business is the key point to drive revenue growth, good business can not only bring a surge in business revenue, but also to improve the loyalty of users in the network. At present, China Unicom's CDMA can not provide a significant difference between the GSM business to attract users.

Insufficient supply of handset terminals

In China Unicom CDMA trial operation period, there was a lack of CDMA mobile phone supply, which restricts the development of CDMA users. The main reason for this situation is: the production of CDMA mobile phone manufacturers a lot of, but they are in China Unicom CDMA test operations see the future of CDMA, in the production of mobile phones more cautious, dare not increase investment.

Single Fee form

Although China Unicom CDMA charges with China Mobile GSM consistent, but compared with China Mobile, Unicom's CDMA charges form a single, lack of attractive high-end users of the tariff package.

China Mobile's strategy on moving data

2001, along with China Mobile group company in the first launch of GPRS test business, mobile data Services in the domestic set off a burst of commentary upsurge. How does China Mobile develop the GPRS business market, and what is the strategy for the mobile data Service market? Do some analysis here.

1. China Mobile to push GPRS business necessity

China Mobile's GPRS business was first driven by the pressure of its rival, Unicom. Because China Unicom is about to launch an enhanced is-95a-oriented, supplemented by the cdma1x of the CDMA network, technically, CDMA can effectively support high-speed packet data communication. In order to keep the competitive advantage and reduce the loss of high-end users, China Mobile must vigorously develop GPRS and the upcoming CDMA to contend with.

Secondly, China Mobile 2000 launched a WAP business much neglected, to save Wap,gprs is currently the only way. From the current situation, 3G commercial time has become inevitable, GPRS as a 3G 2.5G technology, the need for more and more obvious. In addition, GPRS is not the abandonment of WAP, but the inheritance of WAP, WAP devices can be used smoothly on GPRS.

2. China Mobile to develop GPRS strategy

In the market positioning, China Mobile in the trial commercial stage will be the target users of GPRS in two categories of people: business people and new people, age between 25-35 years old, have a higher income, and have a high mobile phone use rate, high Internet access rate. For the formal commercial market positioning, the principle is based on customer demand, but business users, high-end users, group users, new categories, such as the GPRS market will become the focus of the launch.

In the competitive strategy, China moved to change its usual, began to focus on integrated marketing. First of all, China Mobile is not built for the network and competition for competition, they began to establish a suitable business model, and with the development of short message business and mobile dream network to push GPRS business. Second, China Mobile focused on the content of the construction, they introduced a lot of icp/isp to participate in content construction, with social forces to create more new business to attract more users, to achieve a total win. China Mobile has achieved results in this regard, domestic and foreign well-known sites have joined the cooperation, the current Chinese mobile partners in the field has reached more than 300. Moreover, China Mobile is actively addressing the GPRS network construction and channel transmission issues, to the quality of services to meet the needs of future users.

China Unicom's strategy on moving data

1. The need for China Unicom to develop mobile data services

Although China Unicom GSM and China Mobile GSM than the gap is very large, CDMA first-phase engineering equipment is mainly is-95a system, business is still based on voice business, but China Unicom data business is imperative. The reason is: one, China Mobile first launched GPRS from China Mobile pressure, Unicom has to launch mobile data services to ensure that their users do not lose; second, China Unicom new Spatiotemporal CDMA will user group positioning in high-end users, high-end users need data services to meet their job needs, Pressure from users has allowed China Unicom's CDMA to open its data business as soon as possible. With the launch of China Mobile GPRS business, Unicom in CDMA also open Data Services, China Unicom GSM network may also launch GPRS business.

Therefore, China Unicom launched the data business is inevitable, and may be a dual-mode, not only in CDMA, but also in GSM may open the data business at the same time. To that end, China Unicom is also ready on the network, in the first phase of the CDMA project, China Unicom has been a destination in the eastern developed provinces and cities using cdma1x equipment for the future mobile data business needs, in the GSM network and Shanghai Siemens reached an agreement, ready to build in Shanghai GPRS experimental network.

2. China Unicom's Open Data service strategy

In the market positioning, China Unicom CDMA will be user positioning in high-end users, the target is mainly group users, high-end white-collar, and China Mobile GPRS business market positioning is basically consistent, this avoids in the data business with China Unicom GSM network head-on competition, but only with the fierce competition, Because in GSM users, most high-end users are concentrated in the hands of China Mobile, while the Chinese unicom GSM users ARPU value is generally low. China Unicom's future GPRS business may focus on the maintenance of the network users, while attracting a part of China Mobile's high-end users. In the construction of the content, China Unicom adopted the same strategy as Chinese mobile, vigorously introduced a number of icp/isp, to cooperate.

Therefore, China Unicom in the data business strategy is basically based on CDMA, supplemented by GPRS, with China Mobile GPRS launched all-round, head-to-head competition, as far as possible to avoid the internal two different modes of competition.