Section iv provides an application example of cpri in a realistic lte scenario. User air interface network digitizedradio base station internal interface specification layer 1 layer 2. A cpri link transports digitized rf signals antennacarriers in a complex baseband format. Cpri specification v6 common public radio interface. An overview of the cpri specification and its application to cran. The parties cooperating to define the specification are ericsson ab, huawei. An analysis of spectrum allocation, software radio architectures. Cpri allows efficient and flexible iq data interface for various standards e. The cpri specification was specifically created to handle the signal data in this format. Oftentimes, cpri links are used to carry data between cell sites and base stations. Cpri is the short form of common public radio interface. The specification is being developed by a consortium of original equipment manufacturers which. The common public radio interface cpri is the successful industry cooperation defining the publicly available specification for the key internal interface of radio base stations between the radio equipment control rec and the radio equipment re. The cpri intel fpga ip core targets highperformance, remote radio network applications.
The first version of the cpri interface specification will have the following scope. The common public radio interface, or cpri, is an evolving specification for wireless communications networks defined by a consortium of. Common public radio interface cpri is an evolving specification being worked on by a collection of oem manufacturers in telecom. Cpri is a highspeed serial interface for network radio equipment controllers rec to receive data from and provide data to remote radio equipment re. The common public radio interface cpri standard defines an interface between radio equipment control rec and radio equipment re. The common public radio interface cpri standard defines the interface of base. Furthermore, the reference configurations and 4 the basic nomenclature. A digitized and serial internal base station interface between radio equipment control rec and radio equipment re will be specified. Interface cpri ports on bsc92qds and establish communication with radio. The parties cooperating to define the cpri specification and are now encompassing ericsson, huawei, nec and nokia. Oftentimes, cpri links are used to carry data between cell sites and base stations the purpose of cpri is to allow replacement of a copper or coax cable connection between a radio transceiver used example for mobiletelephone communication and typically. It involves the use of baseband units and remote radio units that communicate with each other. By separating the base frequency band and the radio frequency band, cpri achieves a fronthaul setup that can deliver specific benefits in telecommunications.
An analysis of spectrum allocation, software radio architectures and. Cpri common public radio interface is a specification for wireless communication networks that defines the key criteria for interfacing transport, connectivity and control communications between baseband units bbus and remote radio units rrus, which are also called remote radio heads rrhs. Cpri vs ecpri difference between cpri and ecpri used in 5g. Abstract the common public radio interface cpri specifi cation has been. Following the successful program to enhance the cpri specification to support novel radio access technologies, increasing capacity demands as well as. Cpri common public radio interface cpri common public radio interface is a specification for wireless communication networks that defines the key criteria for interfacing transport, connectivity and control communications between baseband units bbus and remote radio units rrus, which are also called remote radio heads rrhs. The i and q samples are interleaved together to create a single word. The necessary items for transport, connectivity and control are included in the specification.
However, neeraj patel, vp of software and services solutions at. The common public radio interface cpri is an industry cooperation aimed at defining a publicly available specification for the key internal interface of radio base stations between the radio equipment control rec and the radio equipment re. In such a case, cpri provides an interface for the interconnection of remote radio heads with a baseband unit by means of. The example in this document uses the following software and hardware. An4990, enabling cpri on bsc92qds application notes. In such a case, cpri provides an interface for the inter. Common public radio interface cpri has been around for quite some time. Synthesizable example design and simple demonstration test bench provided. Cpri fronthaul wireless links for 4g lte networks using millimeter wave mmw eband and.
The logicore cpri ip core is a highperformance ip core solution that implements the common packet radio interface cpri. Qam modulation software defined radio, sdr wireless lan. System and interface definition with ecpricpri iwf type 1 and type 2 12. This definition explains cpri common public radio interface, a free and open specification for communication networks for the interface. What is ecpri, and why is it important for 5g and open vran. Cpri is popular standard for transporting baseband iq signals to the radio unit in traditional bs base station. Each sample has an inphase i and quadrature q component.
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