Data transmission method and system for realizing compatibility of CDMA and WCDMA

Abstract

The invention discloses a data transmission method for realizing the compatibility of WCDMA and CDMA, which comprises the following steps: mapping the service data of a CDMA system and / or a WCDMA system to a CPRI basic frame by a transmitting end and distributing the service data into the CPRI basic frame according to the configuration of the system; transmitting the CPRI basic frame and system configuration information to a receiving end by the transmitting end, carrying out frame resolving and data interleaving resolving on the received CPRI basic frame by the receiving end, carrying out multiplexing resolving according to the system configuration information, carrying out mapping resolving on the data after multiplexing resolving, and recovering a data format required by the corresponding system. The invention also discloses a data transmission system for realizing the compatibility of the WCDMA and the CDMA correspondingly. The invention can realize the transmission of CDMA single-mode service data, WCDMA single-mode service data or WCDMA / CDMA two-systematic service data on the same physical connection, which can save equipment resources and is beneficial to the smooth switching of different modes.

Description

technical field [0001] The invention relates to data transmission technology in mobile communication, in particular to a data transmission method and system for realizing the compatibility between code division multiple access (CDMA) and wideband code division multiple access (WCDMA). Background technique [0002] In recent years, the development of communication system architecture has gradually formed such a trend: the radio frequency unit and the baseband processing unit are separated, and the two are connected through long-distance transmission means (such as optical fiber), and then the radio frequency unit is placed in various places where needed . This architecture improves the flexibility of networking on the one hand, and reduces the maintenance cost of the network on the other hand. Therefore, this architecture is more and more recognized by users, and there are more and more application occasions. In 2003, this architecture was proposed as part of the CPRI (Comm...

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Problems solved by technology

[0004] The compatibility method between the existing WCDMA system and the CDMA system is to switch between the two sets of codes, which cannot be unified at the bottom layer, that is, it cannot be truly called the compatibility between the WCDMA system and the CDMA system. Therefore, the existing technology needs to pass through different optical fibers or cables. Realize the interconnection and intercommunication between REC and RE, which consumes a lot of resources and is not conducive to the smooth switching of different standards

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