Common Public Radio Interface

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Specification

Specification Overview

The first version of the CPRI interface specification will have the following scope:

1. A digitized and serial internal base station interface between 'Radio Equipment Control' (REC)
and 'Radio Equipment' (RE) will be specified.

2. The necessary items for transport, connectivity and control are included in the Specification. This includes User Plane data, Control Plane transport mechanisms, and means for synchronisation

3. The Specification will cover Layers 1 and 2 of the OSI stack.

3a. The physical layer (layer 1) will support both an electrical interface (i.e. what is used in traditional base stations), and an optical interface (e.g. for base stations with remote radio equipment).

3b. Layer 2 shall support flexibility and scalability.

4. The Specification shall comply with 3GPP UTRA FDD release 5.

Interface Specification Download Terms and Conditions

Non-assertion of Essential Patents and Copyrights

The Parties shall not assert any of their Essential patents against any Party or a third party using, developing, having developed, manufacturing, or having manufactured and/or selling any RE and/or REC product that includes an interface which is fully compliant to the Specification, but solely to the extent that the interface is fully compliant to the Specification.

Such obligations not to assert shall apply against any Party or third party provided that and as long as such Party/party does not assert any of its Patents against the non-asserting Party, its affiliates, its customers, and/or subcontractors producing the non asserting Party's product.

In this event the applicable Party shall, subject to reciprocity and upon the asserting party's request, offer on fair, reasonable and non discriminatory terms and conditions a license to its Essential patents to use, develop, having developed, manufacture, or having manufactured
and/or selling any RE and/or REC product that includes an interface which is fully compliant to the Specification, but solely to the extent that the interface is fully compliant to the Specification.

"Essential patents" means any Specification patents or patent applications of such a nature that a party could not, technically, manufacture and/or sell RE and/or REC products that include an interface which is fully compliant to the Specification without infringing such patent or patent application.

"Relevant patents" shall mean any patents or patent applications whose claims subject matter can be used or interfaces with the Specification and that would be infringed by any product or application used or interfacing with the Specification.

"Patents" shall mean any Essential or Relevant patents or patent applications as defined above.

The copyright for the Specification is owned jointly by all Parties. The Parties shall not assert any copyright in order to prevent free copying of the Specification in connection with the use thereof.

In short this means that the CPRI parties agrees not to assert any patents agains the downloading party as long as the downloading party does not assert any patents agains the CPRI group

No License

IN ORDER TO AVOID ANY DOUBT, BY DOWNLOADING THE SPECIFICATION NO EXPRESS OR IMPLIED LICENSE AND/OR ANY OTHER RIGHTS WHATSOEVER ARE GRANTED FROM
ANYBODY.

Before downloading the Interface Specification you must read and accept the above stipulated Specification Download Terms and Conditions.

CPRI specifications version 1.4, 2.1, 3.0 and 4.0 are now available for download. Version 1.4 contains editorial and corrective changes from version 1.3. Version 2.1 contains editorial and corrective changes from version 2.0. Version 3.0 contains the addition of WiMAX, an increase in the line bit rate and the inclusion of change requests and Version 4.0 is adding LTE to the specification.

Radio Equipment (RE) and
Radio Equipment Control (REC) description

Download document describing (defining) RE and REC

Comments and proposals

Comments and proposals to CPRI can be submitted from www.cpri.info/comments.html.

The CPRI Specification versions 1.4, 2.1, 3.0 , 4.0 and 4. 1 are now available for download on the Specification section of this homepage. A variety of CPRI products have been made available to the market by the individual CPRI Parties.

May 20 2009
The CPRI Specification version 4. 1 (in addition to 1.4, 2.1, 3.0 , 4.0 ) is now available for download on the Specification section of this homepage. The new 4. 1 release extends the specification to encompass higher line-rates for LTE (Long Term Evolution). A variety of CPRI products have been made available to the market by the individual CPRI Parties.

October 04 2008
The CPRI Specification versions 4.0 (in addition to 1.4, 2.1, 3.0) is now available for download on the Specification section of this homepage. The new 4.0 release extend the specification to encompass the developments for LTE (Long Term Evolution). A variety of CPRI products have been made available to the market by the individual CPRI Parties.

March 06 2007
CPRI specifications version 1.4, 2.1, and 3.0 are now available for download. Version 3.0 contains the addition of WiMAX, an increase in the line bit rate and the inclusion of change requests. Version 1.4 and 2.1 is unchanged.

August 29 2006
CPRI specifications version 1.4 and 2.1 are now available for download. Version 1.4 contains editorial and corrective changes from version 1.3. Version 2.1 contains editorial and corrective changes from version 2.0.

October 15 2004
CPRI specifications version 1.3 and 2.0 are now available for download. Version 1.3 contains editorial and corrective changes from version 1.2. Version 2.0 contains support for networking.