Packet data service of CDMA 1xRTT

CDMA2000 standard developed from IS-95 CDMA, and to the mobile phone users backward-compatible, that is, the existing IS-95 CDMA mobile terminals can still continue to use in CDMA2000 network. According to the development of CDMA2000, can be divided into 1xRTT and 3xRTT phase, 3xRTT CDMA2000 provides the maximum 20MHz channel bandwidth and 2.4MB/S data transmission rate. Because of the 3xRTT technology span and equipment investment, the current development of the 1xRTT phase of the product can meet the basic requirements of wireless mobile Internet, but also for the market to bring buffer, but also for the future smooth transition to the CDMA2000 of higher stage to build the foundation.

1xRTT Wireless packet network characteristics of high mobility: 1xRTT network users can use the CDMA specific should switch, soft switching, more soft switching technology, can be implemented in most cases without interruption of the cell switching, in this respect compared to GSM has unparalleled advantages.

Mobile IP Address: By running the mobile IP protocol, regardless of the user moved into the IP subnet, can maintain the end IP address, all application connections can be maintained.

Forever Online: This is the advanced feature of the 3rd generation Mobile communication, which enables users to keep their network connections regardless of whether they are in a data call or not. When the user is in a state of no data exchange for a long time, the air connection between the mobile station and the base station is released, but the network connection is maintained. Not only can save wireless resources, but also save user costs. (Computer science)

High performance price ratio: compared to 3xRTT, 1xRTT investment cost is low, full-featured, smooth technology transition and small risk, very suitable for China's national conditions. 1xRTT supports 144Kbps data transfer rate, enough to meet the basic needs of users including video conferencing, and low price.

The structure and composition of the network compared with the second generation CDMA system, 1xRTT system has introduced the data core network based on packet switching on the basis of its RF access network and circuit switching core network, which can support up to 144KBIT/S packet data service.

The Group control function block (Packet controls function,pcf) mainly acts as the interface between the RF part and the packet Network (IP network), while the Packet Data Service node (Packet Data Service NODE,PDSN) acts as the agent of the mobile IP, It has the functions of establishing, maintaining and terminating the PPP connection and authentication, authorization and billing of mobile users. Among them, MSC for Mobile switches, BSC for the base station controller, BTS for the RF transmission system.

Open RP 1xRTT products for Nortel Networks

In order to enable the North electric equipment and other manufacturers of interconnection, Nortel launched in accordance with China's CDMA2000 specifications open RP Interface products, compatibility and quality have been further improved.

The open RP 1xRTT product of Nortel Networks also incorporates an integrated design that integrates the functions of PCF into BSC, with the RP interface of BSC. PCF relies on the stable and reliable BSC platform, strengthens the reliability, also hides the A8/a9 interface between BSc and PCF, and runs faster and more reliably with the internal bus, and reduces the cost of the equipment investment and maintenance of the users.

It can be foreseen that the advanced third generation mobile communication network technology will bring the new situation of mobile communication, and provide strong support for the rapid growth of China's economy.